Chemical Heat Treatment of Steel in CNC Machine Tool Plant


Chemical heat treatment is to place a metal or alloy workpiece in an active medium at a certain temperature for heat preservation, so that one or several elements penetrate into its surface to change its chemical composition, structure and properties. Compared with surface quenching, chemical treatment not only changes the structure of the surface layer, but also changes the chemical composition of the surface layer. After chemical heat treatment in CNC machine tool factory, combined with conventional heat treatment, the surface and core of the same workpiece can obtain different microstructure properties.
The CNC machine tool factory can be divided into carburizing, nitriding, carbonitriding, boronizing and dissolving chromium, etc. according to the different elements infiltrated.
1) Port carbon of CNC machine tool factory steel
Carburizing is a chemical heat treatment process in which steel workpieces are heated and maintained in a carburizing medium to infiltrate carbon atoms into the surface layer. The main purpose of the carbon is to improve the surface strength, wear resistance and fatigue strength of the workpiece, while maintaining the good toughness of the core.
Carburizing steels are generally low-carbon non-alloy steels and low-carbon alloy steels, and the carbon content is oi%-o.2s%. The traditional carburizing methods include gas, liquid, and solid. Gas carburizing is commonly used in CNC machine tool factories. In order to improve the efficiency and quality of carburizing, new technologies such as vacuum carburizing and vacuum ion carburizing are gradually being promoted and applied.
2) Chlorination of steel in CNC machine tool factory
Nitriding is a chemical treatment process in which nitrogen is infiltrated into the surface of the workpiece to obtain a high nitrogen hardened layer. The purpose of nitriding is to improve the surface hardness, fatigue strength, adhesion resistance and wear resistance of steel.
The steel for nitriding is usually steel with alloying elements such as Al, Cr, Mo, Ti, V, etc., because these elements easily form various nitrides with fine particles, uniform distribution, high hardness and stability with ammonia. After nitriding, the workpiece will obtain high hardness, and no quenching treatment is required. In order to ensure the mechanical properties of the core, quenching and tempering treatment should be carried out before nitriding.
Compared with carburizing, the workpiece after nitriding has high hardness, wear resistance and hot hardness without quenching. However, the chlorine time in the roadway is long, the cost is high, and the nitriding layer is thin and brittle, which cannot withstand the impact. It is mainly used for precision parts with high surface hardness, wear resistance, corrosion resistance and high temperature resistance, such as precision machine tool spindles, screw rods, etc.
3) Carbonitriding (cyanidation) of steel in CNC machine tool factory
Carbonitriding is the process of carburizing and ammonia to the surface of steel at the same time, which is customarily called cyanidation. Cyanidation in CNC machine tool factory is to put the workpiece in an active medium containing cyanide or cyanide, and after heating and holding for a certain period of time, carbon and nitrogen will diffuse into the surface layer of the workpiece. Because cyanide is highly toxic, gas carbonitriding has been gradually used instead of cyanide. At present, there are many applications of medium temperature gas carbonitriding and low temperature gas carbonitriding. Medium temperature gas carbonitriding is mainly carburizing, and its purpose is to improve the hardness, wear resistance and fatigue strength of steel; low temperature gas carbonitriding Co-infiltration is mainly based on fluorine infiltration, and its purpose is to improve the wear resistance and adhesion resistance of steel.


At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest CNC milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Motor Of CNC Machine Tool And Electric Control Of Machine Tool


Modern metal cutting machine tools use electric motors as power sources. Machine tool spindle speed, table or tool post feedThe regulation and the control and operation of the working cycle are inseparable from the electrical components, electronic components and systems. The electrical control system of the machine tool has become an indispensable part of the modern machine tool. The electrical-based automatic control system continuously improves the performance of the machine tool and greatly simplifies the structure of its working mechanism and transmission mechanism.

After more than a century of development, with the continuous updating of electrical appliances and electrical control systems, the structure of machine tools has not changed.Continuous improvement, performance continues to improve. Electric drag has unparalleled advantages and development prospects in speed regulation. The use of DC stepless speed regulation motor to drive the machine tool makes the original complex structure of the gearbox very simple, greatly simplifies the machine tool structure, and improves the transmission efficiency and rigidity. In recent years, the motor-spindle components for CNC machine tools, milling machines, and machining center machine tools have been successfully developed. The rotor of the AC motor is directly installed on the spindle, so that it has a wider range of stepless speed regulation, and the vibration and noise are stable. Reduced and completely replaced the spindle speed change gearbox, which will have a profound impact on the transmission and structure of the machine tool.


In terms of electrical control, modern machine tools have comprehensively applied many advanced scientific and technological achievements, such as: computer technologytechnology, electronic technology, automatic control theory, precision measurement technology, etc. Especially in today’s information age, microcomputers have been widely used in all walks of life, and machine tools are one of the earliest devices to use computers. already 20 century 40 At the end of the 1990s, electronic computers were organically combined with machine tools to produce new machine tools. At present, various types of microcomputers with high quality, low price and reliable performance are widely used in the machine tool industry. Various factories and enterprises in my country are also vigorously using and promoting CNC machine tools and digital Display devices controlled by microcomputers.


The application of the latest science and technology makes the electrical equipment of machine tools continuously modernize, and continuously improve the degree of automation of machine tools and machine tools.Processing efficiency, expanding the scope of the process, shortening the labor intensity and reducing product costs.Various mechatronics that appear todayChemical products, CNC machine tools, robots, flexible manufacturing systems, etc. are the fruits of the modernization of machine tool electrical equipment.


All in all, electrical automatic control has an extremely important position in modern machine tool equipment, mechatronics, machinery manufacturingand equipment and other majors, as well as engineering and technical personnel engaged in mechanical design and manufacturing must master machine tool electrical and microcomputerTheoretical methods of control.

 


At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest CNC milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Manufacturing Process Of Pitch-based Carbon Fiber


Asphalt is a low-molecular-weight hydrocarbon compound mainly composed of condensed polycyclic aromatic hydrocarbon compounds, some of which contain a small amount of sulfur and oxygen. Asphalt has a characteristic that the carbon content is more than 70%, so it is often used to make carbon fiber. Carbon fibers made from pitch can be mainly divided into two types, one with lower mechanical properties and the other with particularly good tensile strength.In this article, I will tell you about manufacturingpitch-based carbon fiberbasic process flow.
 
The pitch base used to make carbon fibers needs to meet several conditions. First of all, the pitch fiber must have good spinning rheological properties and chemical activity, because after spinning, if the fiber is not melted, it needs to undergo chemical reaction. If the chemical activity of the pitch is too poor, it cannot be well completed. this step. It must then have the chemical structure, relative molecular mass and distribution required for the mechanical properties of the pitch fiber. In order to make qualified asphalt, its chemical composition must be continuously adjusted. In addition, pitch is in a molten state, unlike general polymers. It cannot be stretched after curing, the strength is not high, and it is relatively fragile. Therefore, when spinning, the diameter of the filament is required to be less than 15 μm, so as to improve the strength.
 
In order to prevent the pitch fiber from melting during carbonization, it must be treated without melting before carbonization. There are two methods, gas-phase oxidation and liquid-phase oxidation. Vapor-phase oxidation is carried out in oxidizing gases such as ozone and sulfur trioxide, while liquid-phase oxidation is carried out in oxidizing gases such as sulfuric acid and hydrochloric acid. In this way, more satisfactory pitch-based carbon fibers can be produced. Pitch-based carbon fiber is mostly used to make carbon fiber parts with high performance requirements, and has irreplaceable value in the market.

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.

Motor Drive Failure


Fault phenomenon: Once started, the external fuse of the driver is burned out, and the equipment cannot run. When the maintenance personnel inspected, they found that a power tube was damaged, but because there was no information, they could not figure out the function of the tube, thinking it was the front push of the power drive. , replaced a power tube, after the power was turned on, the insurance was burned again, and the replaced tube was also damaged.

After detailed inspection by the maintenance personnel, the initial analysis was correct, that is, the fuse was repeatedly blown, there must be an abnormal high current in the driver, and a power tube was found to be damaged, but the function of the tube was not clear. In fact, the tube is a stepper motor power drive tube, and the stepper motor is started at high voltage, so it has to withstand high voltage and large current. The static inspection of Shenyang No. 1 Machine Tool Factory found that in the circuit of the pulse ring distributor, the resistance value from the Power Supply to the ground terminal is very small, but there is no short circuit. According to the number of components in the line and its power consumption analysis, the resistance value from the power supply to the ground terminal should not be so small, so it is suspected that there are components in the line damaged.

After power-on inspection, it is found that a chip is abnormally hot; after power-off, the power supply pin of the chip is disconnected, and static inspection, the increase of the resistance value of the power supply to the ground should be normal. Shenyang No. 1 Machine Tool Factory measured the resistance of the chip’s power supply to ground is very small. The machine tool factory checked the model of the chip, and it was a non-standard model, which was not found in many manuals. After circuit analysis, it was confirmed that it was the main component (ring pulse distributor) in the board.

In order to further confirm the problem of the chip, the machine tool factory first replaced the stepper motor power drive tube with the same withstand voltage and current power, restored the power supply pins of the chip, and replaced each winding of the stepper motor with a light-emitting diode circuit as a simulated load. After the machine tool factory is powered on, the light-emitting diodes are all on, and the machine tool factory is powered on all windings, which does not meet the circuit requirements, and there is no response to the input stepping pulse, so it is confirmed that the chip is damaged.

This chip is not available in the market. When the space in the driver housing allows, a combination circuit is used, that is, a ring pulse generator is designed with the combination of the existing D flip-flop and NAND gate, and is fabricated on a small printed circuit board. On the board, remove the original chip and install the small printed board on the pad of the original chip through the pins, and still use the light-emitting diode as a simulated load.

The machine tool factory removed the simulated load, connected to the host, powered on, and the equipment was running normally. The example of the machine tool factory shows that the maintenance personnel should not only be able to analyze the phenomenon (overcurrent) and find out the obvious cause of the failure (damage of the power tube), but also be able to analyze the primary cause of the failure step by step (damage of the pulse generator), And can use the existing component combination to replace the difficult-to-solve Device problem.


At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest Cnc milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Forming Analysis And Processing Of Complex Thin-walled Surface Aircraft Sheet Metal Parts


Sheet metal parts are an important part of modern aircraft. Relevant surveys and statistics show that sheet metal parts account for 70% of the total number of aircraft parts. From the perspective of production workload, the labor amount is about 15%. The complex structure, rich volume variety and large external expansion size are all significant features of sheet metal parts, and their processing quality will have a direct impact on the overall production progress and quality. In order to effectively meet the production needs of modern aviation enterprises, it is necessary to realize the utilization of advanced mechanical automation technology in combination with the actual situation.

 

1. Parts Analysis

 

We analyze the aluminum alloy material with a thickness of 0.3mm. After scientific thinking and analysis, we summarize the main problems in the following points and analyze them carefully.

 

(1) The thickness is thin, which has a direct impact on its ductility, resulting in the problem of poor ductility.

 

(2) One-time corner forming cannot be realized in a true sense, and phenomena such as cracking and wrinkling are generated in this process.

 

(3) There is an inseparable and close relationship between the surface processing position and the mold design work, but it is difficult to design and carry out the mold design work, which greatly hinders the smooth progress of the parts processing work.

 

(4) The complexity of parts is a significant feature of 3D surface design, so continuous process experiments are required, which will lead to an increase in cycle and cost to a certain extent, which is not conducive to the realization of the maximum economic benefits for relevant enterprises.

 

(5) The ultra-thin welding processing method used in the actual processing of the parts, so there will be great difficulties in welding the three-dimensional curved surface. This will increase the workload to a certain extent and have a negative impact on the improvement of construction work efficiency.

 

2. Discussion on the Feasibility of Part Forming

 

(1) The effective establishment of the model can be achieved by using 3D design software. In this process, attention should be paid to the use of parameterized commands. In order to promote another plane to be produced under the part in a true sense, it is not allowed to use scientific means to achieve the correct model. The establishment of 3D model coordinates. Take care to keep its height at a distance of 1mm from the ground. When actually setting the corresponding position, pay attention to the organic combination with the aviation sheet metal design module in the software.

 

(2) Pay attention to the reasonable use of CATIA software when actually analyzing the thickness. On this basis, not only the material thickness can be selected, but also the setting of the material properties of the part can be completed in this process, which will lay a solid foundation for the subsequent part forming work. Solid foundation. In the integral forming of the part, the thickness will change greatly, and the change rate at the bending corner will show the largest trend, which can explain that the wrinkling problem will occur at the corner to a certain extent.

 

(3) The stress distribution of the formability can be performed in the CATIA software. Through the stress distribution graph, it can be obtained that the part has relatively large stress change characteristics, and the stress distribution of the part is 158.3MPa~427.5MPa. Among them, the stress change is in the fold. It is the largest outside the corner and can reach a maximum of 427.5MPa. This very variable corner point can be seen, the bend corner is vulnerable to damage.

 

(4) The application of CATIA software can also realize the strain analysis of the part. From the analysis of the results, it can be seen that the strain of the part has a relatively large change, and the strain changes from 0.0168 to 0.2345. Likewise, the largest strain occurs at the corners, which is prone to some wrinkling and cracking.

 

(5) Using CATIA software to further expand and analyze parts, it can be seen that the expanded graphics have a lot of intersections. Through CAE software, the content that cannot be displayed on the plane can be realized, so that the design defects can be minimized.

 

3. Parts splitting and unfolding

 

(1) In forming, the use of CATIA software can ensure further analysis of formability. Combined with the specific situation, it can be divided into two parts to be processed, mainly including surface forming and plane forming. With effective splitting, complex parts can be divided into two parts. The problem is simplified, and the problems of cracking and wrinkling are avoided as much as possible;

 

(2) Analyze the forming of the part through CATIA software, and carry out the analysis and design of the relevant forming plane and curved surface for the relevant stress, strain change and thickness in the part;

 

(3) After the sheet metal parts are unfolded and designed, in order to further process, it should be ensured that the effective unfolding process is carried out to ensure that the shape and size of the sheet metal are determined. Combined with the traditional unfolding method of sheet metal parts, due to the manual development based on experience, there are mainly the following difficulties: First, the problem of relatively low efficiency, it is easy to make mistakes in the unfolding, and further trial and error should be carried out; the second is the large workload , the specific process is very cumbersome; the third is the problem of relatively low precision, due to the large proportion of relying on experience, resulting in unnecessary waste of materials and labor. Make full use of the automatic unfolding of the sheet metal module in the computer-aided design software CATIA, can use the computer to process the automatic unfolding process, realize one-dimensional processing, and use the automatic calculation to obtain the unfolded shape, which can have the advantages of high precision and zero error rate.

 

(4) Based on the analysis of the formability of the parts, a certain comparison is made. From the split forming and the integral forming, it can be seen that for the integrally formed parts, the corresponding stress and thickness requirements cannot meet the material mechanics. performance, there will be surface intersections.

 

4, mold rapid design

 

Using the module modeling instructions in the 3D design software CATIA can ensure the establishment of a 3D model suitable for practical applications, and at the same time, establish 3D coordinates, and use the extraction volume command to effectively extract parts from the inner surface and inner plane, so that the 3D model can be hidden. Through the surface sweep, the related processed surface can be obtained, ensuring that it and the extracted body can be effectively stitched and processed as a whole. The plane is then established in the part, kept horizontal, stretched, effectively trimmed into a die, and positioned. On the basis of stretching, the trim body command should be used for effective trimming, which requires the shearing process between the target body and the cutter body, and the punch forming shape should be generated according to the actual situation. Then, the difference operation in the stretching command should be used. , effectively get the punch mold. Similarly, according to the three-dimensional software, the corresponding upper mold and female mold can also be obtained.

 

5, manual forming steps

 

Manually, on the basis of the above, it is possible to form punches and concave dies to form planes and curved surfaces of related parts, effectively ensuring that the corresponding planes, curves and 3D modeling are highly consistent. The relevant coordinate detection, which can measure the corresponding plane and curved surface, meets the requirements of the pattern.

 

6. Parts Welding Treatment

 

For the welding process of aluminum alloy, due to the existence of hot cracks, there are mainly cracks, and the related cooling heat affected zone metal will appear embrittlement, cracks, stress cracking, intergranular corrosion and other problems. Similarly, For the processing of this material, problems such as relatively poor thermal conductivity, relatively large welding deformation and relatively large linear expansion coefficient are inevitable.

 

7. Conclusion

 

Using the manufacturing technology in the 3D-aided design software, the integrated process from design to manufacturing of complex thin-walled surface sheet metal parts in aviation can be realized. Through intelligent manufacturing methods, it can effectively ensure that the product development time is greatly shortened, and the research and development cost is effectively reduced. cost, and help to reduce the error rework rate.

Sheet fabrication services for mild steel, high strength low alloy (HSLA) steel, cold/hot rolled steel, galvanized steel, stainless steel, aluminum, copper and brass. Capable of fabricating parts up to 12 ft. length and +/-0.001 in. tolerance. Various capabilities include contract manufacturing,custom stamping,edge rolling, forming,top laser cutting, roll bending and welding. Finishing and secondary services such as hardware installation, tapping, deburring, cleaning, heat treating, plating, anodizing and painting available. Sheet Metal Prototype and low to high volume production runs offered. Suitable for commercial/residential architectural, aluminum brake shape parts, wall panel systems, brackets, general flashings, rails, call button plates and ship building component parts.

Carbon Fiber Roller Production Requirements


Roller is a supporting rotating part and rotates with it to transmit motion, and is an important part of torque or bending moment. In the past, it was mostly made of metal materials. With the increase in the requirements for the rollers, the application of carbon fiber rollers has gradually increased. What are the requirements for the production of carbon fiber rollers? Let’s find out in this article.
 
First of all, ensure the quality of the product. For the working surface of the carbon fiber roller, there should be no defects such as pores and grooves, and the surface thickness should be uniform. Otherwise, the temperature of the carbon fiber roller surface will be uneven, which will affect the quality of the product. Therefore, the surface of the carbon fiber roller should be finely processed to ensure dimensional accuracy and surface smoothness.
 
Rigidity is also a necessary condition for carbon fiber rollers. Under load, the bending deformation cannot exceed the allowable value of the material. The mechanical properties of carbon fiber composite materials are very outstanding, and their tensile strength, bending strength and stiffness are better than most metals. Structural material to meet the needs of strength.
 
The surface of the carbon fiber roller needs to work for a long time, so it must have corrosion resistance and wear resistance. Carbon fiber is a non-metallic material with low electrochemical activity, which can adapt to a variety of complex working environments. In terms of improving production efficiency, some light materials are needed to reduce inertia and increase rotational speed, which effectively reduces energy consumption and achieves the purpose of improving production efficiency. The density of carbon fiber composite materials is only 1.7g/cm3, Less than 1/4 of steel, it is a new generation of weight-saving materials.
 
China Be-cu Prototype Material Technology Co., Ltd. is a professional manufacturer of carbon fiber products, which can meet the needs of carbon fiber products in rail transit, automobile industry, medical equipment, and other fields. Exported to Europe and the United States and other countries.

 

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.

Keyway On Long Shaft With Disc Slotting Cutter For Lathe


1.Clamping of lathe workpieces

When milling a long keyway on a long shaft with a diameter of 20 ~ 60mm, the workpiece can be positioned on the T-shaped groove in the center of the worktable, pressed with a pressure plate, and processed with a disc-shaped groove milling cutter.

2.The method of centering the lathe

During milling, in order to make the center of the thickness of the disc slot milling cutter pass through the axis of the workpiece and ensure that the center of the workpiece is symmetrical on both sides of the keyway to be milled, the following two tool setting methods are commonly used in lathes.

  • After the cutting marks are aligned with the central workpiece, make the center of the thickness of the milling cutter roughly in the center of the workpiece, turn on the tool, and cut out an oval facet slightly smaller than the width of the groove at the busbar on the workpiece. Observe If the center of both ends of the milling cutter is at the center of the facet, the center of the width of the milling cutter passes through the center of the workpiece. After the center of the lathe is aligned, the transverse feed is tightened, and then the workpiece is adjusted.
  • After measuring and aligning the workpiece, make the center of the thickness of the milling cutter roughly align with the center of the workpiece, put the square ruler on the worktable, and make the ruler seedlings against the busbars on both sides of the workpiece respectively. Measure with a vernier caliper so that the dimension A=A’, that is, the center is aligned. After the center of the lathe is aligned, the workpiece can be processed.

3.Milling method

Mill through and semi-through grooves on the long shaft, and the depth can be milled at one time. When milling, press the pressure plate at a distance of 60~100mm from the end of the workpiece, and mill a slot length from the end of the workpiece inward; then stop, move the pressure plate to the end of the workpiece, and place the copper sheet on the workpiece to clamp the workpiece; observe the impact of the milling cutter on the workpiece.

Without pressing the plate, turn on the machine and mill out the full length by self-feeding. The long keyway can be milled by moving the platen and workpiece several times. When the lathe is moving, stop the rotation of the milling cutter first, use a brush to remove the chips in the groove, and retract the cutter to the original position, but the milling cutter should not be separated from the workpiece, release the pressure plate, and move the workpiece axially.

When the lathe is milling, the position of the pressure plate should be paid attention to, and the milling cutter should not touch the pressure plate.


At Be-cu.com,we use advanced equipment to offer you Unparalleled precision for producing metal and plastic machining parts

  • We combine the latest Cnc milling and turning processes with proprietary technology to deliver high quality, on-demand parts.
  • Our team of engineers and machinists program the equipment to optimize cutting time, surface finish, and final tolerance to meet your design specifications
  • We specialize in cnc precision machining, single part prototyping, short to medium production runs, manufacture parts on time, every time, so you can stay ahead of schedule
  • CNC machining can create very similar parts to series parts. It is often more efficient and faster than other rapid prototyping technologies for the manufacture of a quantity of prototypes between 1 and 10 parts . We also recommend CNC machining for parts with large sizes (greater than 600 mm).

Fiber Laser Welding Brings New Capabilities And Flexibility


Welding metals and alloys with fiber lasers is bringing more new capabilities and greater flexibility to the field, which has led to increased attention from many leading manufacturers, especially in aerospace. These research and progress are mainly to develop processes and systems related to fiber laser welding of 2D and 3D components, including low, medium and high power CW and QCW fiber lasers.

Proven application on metals and alloys such as 304 stainless steel, titanium alloys (Ti-6Al-4V titanium alloy and Ti-6Al-2Sn-4Zr-6Mo titanium alloy) and nickel based refractory alloys including Inconel 625, Inconel Superalloys such as 718 and Hastelloy X. With their kilowatt average power, 1 μm wavelength, and high brightness (beam quality), high-power CW and QCW fiber lasers offer a laser source with new capabilities and flexibility

Compared to CO2 laser welding, 1 μm wavelength fiber lasers offer advantages including: the use of fiber optic cables without the need to turn mirrors, which makes beam guidance easier; more absorbed by metals, especially those that are well conductive, such as aluminum and Copper; less absorbed by the plasma plume formed on the weld puddle. Compared to high-power Nd:YAG lasers, the higher brightness of fiber lasers means that the laser beam can be focused to a smaller size as needed, which results in higher power density. These factors contribute to higher penetration and faster welding speeds than other laser sources at the same power. It will also contribute to a more stable welding process in a wide variety of metals and alloys.

Over the past 33 years, Laserdyne has installed many laser welding machines for aerospace (engine and airframe), automotive, electronics, hydraulic couplings, medical equipment and other applications using CO2 and Nd:YAG lasers As a laser light source, fiber lasers are more recently used. Extensive experience gives Laserdyne the full flexibility to use these lasers to weld high value-added components.

Welding Metals And Alloys

Welding experiments were performed with Prima Power Laserdyne equipment under a range of different laser parameters and shielding gas conditions. Use metallographic analysis (section) and X-ray techniques to record laser (spot size, laser power, etc.) and processing parameters (type of shielding gas, gas flow rate, gas delivery method, welding speed, focus position, etc.) and the resulting weld The relationship between shape and structure. For example, the tests shed light on the factors that cause porosity in welds and how to obtain porosity-free welds. These tests also illustrate the effect of laser and processing parameters on weld shape and structure.

The most comprehensive research has recently been around the application of laser welding of aerospace alloys (Figure 2). For these materials, the main challenge is that the requirements for the connection are extremely strict, and the welds must not have any cracks or pores. It must be ensured that the correct shape of the weld is obtained to guarantee good mechanical properties also at high temperatures. Tests have shown that CW and QCW fiber lasers have the ability to weld aerospace alloys.

The challenge, however, lies in the robustness of the laser and machining parameters, which means guaranteeing a consistently stable quality of the weld. Laserdyne has formulated laser and machining parameters for welding applications in all aerospace alloys. Welding tests have shown that weld quality is not controlled by a single parameter, but is influenced by a combination of laser and machining parameters. These studies also show that welds free of cracks and pores can be obtained relatively easily in a range of nickel- and titanium-based alloys.

The welding test also includes filler wire welding. The joining of certain alloys and dissimilar materials requires additional filler material to control the structure of the weld metal and avoid cracks, thereby ensuring the desired mechanical properties are obtained. In other cases, filler metal is used to control the geometry of the weld, giving the surface of the weld fusion zone a slight bump (reinforcement). Filler materials are also used to compensate for poor or even mismatches in laser welded butt joint construction. The laser wire filler welding process is affected by a variety of parameters, and many parameters of the laser and wire filler determine the quality of the resulting weld. Through the above welding tests, all important parameters related to the addition of filler material have been optimized, thus ensuring the quality of the weld.

Brings New System Features

A major hardware development is a new focusing lens group with a cross-nozzle design that ensures the compact form factor of Laserdyne’s third-generation BeamDirector system (called BD3Y). The cross-nozzle design provides a high-velocity gas barrier to prevent metal sparks from the weld area from contaminating the lens guard slide. The key to this design is that the cross nozzle also avoids contamination or interference from the welding shielding gas. Cross nozzles can affect complete shielding gas supply equipment, including welding coaxial gas nozzle tips.

The shielding gas liner will provide a controlled melting zone in the weld zone, where it will cool until the material is unaffected by the ambient atmosphere. This is important for welding materials that have a strong affinity for oxygen and nitrogen in the ambient atmosphere, such as titanium alloys. Another important benefit of the design of the focusing lens/shielding gas assembly for laser welding is that these assemblies can be quickly adjusted by means of an embedded focusing lens to change the size of the focused spot.

Increased Control For High-Quality Welds

The use of Laserdyne S94P controls has proven to enable new laser control capabilities, especially slow acceleration control of laser power and sub-millisecond laser pulse shaping, which results in more consistent, high-quality welds. It expands the range of materials for laser welding applications, thereby increasing the flexibility of laser welding systems. Pulse shaping has been shown to be effective in controlling the shape and structure of the weld. This is mainly achieved by controlling the temperature distribution during weld formation and cooling of the weld fusion zone and heat affected zone.

For example, the cooling of the alloy is controlled by providing a lower pulse amplitude after the initial part of the pulse, which gradually hardens with the rapid cooling during laser fusion. Another example is the use of pulse shaping (maintaining high pulse amplitude in the leading edge portion) for materials that reflect the laser beam. Rapidly heating the surface increases the absorption of the laser beam for a more consistent process.

All of the above functions have been standardized and implemented in the company’s product line of 3-axis and 7-axis systems. The progress on these fiber laser systems is just the beginning: as new users join, there is no doubt that their unique applications and their experience will help the industry to increase productivity, improve quality, and achieve greater benefits.

How To Use The Correct Joining Process In The Application Of Carbon Fiber Products


Carbon fiber products, if you want to have excellent performance, you need to use carbon fiber products produced by continuous carbon fiber composite materials. At this stage, continuous carbon fiber products are still mostly processed parts, which are applied to many industries. At this time, you need to do the corresponding Machining enables carbon fiber products to be stably and firmly connected to the equipment. At this time, it is necessary to consider what kind of connection process to choose. The carbon fiber products produced by Be-cu prototypes are designed into many industries, so I will tell you about them in this article.

 

In the connection method of carbon fiber products, there are two commonly used processes: gluing and mechanical connection. Of course, the connection of the two can also be mixed, so what kind of connection process is used needs to take into account the actual application of carbon fiber products. It can be viewed from several aspects.

First understand the bonding, bonding is to connect carbon fiber material with other materials through glue, then this is a fixed product connection, for example, you are industrial parts such as carbon fiber tubes and aluminum metal parts to become carbon fiber rollers, and then zero The components need to be fixed on the solar panel, which is also the way to be fixed. When gluing, make sure that the product does not need to be disassembled frequently. Once it needs to be disassembled, the gluing is not very suitable. In addition, during the gluing process , It is necessary to ensure the cleanliness of the glued part, so as to ensure that the strength of the glued joint meets the requirements. Although the carbon fiber products are not easy to disassemble in the glued way, the glued joint also has the advantages of glued joints. The strength performance of the glued carbon fiber products It will not be too low, and does not require drilling and other operations, and will not cause damage to the carbon fiber product, so that the surface of the carbon fiber product is not easy to corrode, and the stress will not have a great impact, and the carbon fiber product is not easy to deform. , the whole product will not have a great increase in quality, that.

The mechanical connection is to increase mechanical connections such as screws and flanges by opening holes. At this time, it is necessary to carry out corresponding machining machining methods for carbon fiber products. Pay attention to no damage and no burr tearing. The mechanical connection will increase the overall weight, but the mechanical connection is easier to disassemble and can transmit the overall load very well. In addition, there are other advantages in the mechanical connection. For example, in a different way than gluing, you will suffer Due to the influence of temperature and humidity, the overall stability of the mechanical connection is better. If there is a requirement for performance, the mechanical connection method will be used more. There are also defects in the bonding. For example, you will have stress problems in machining, and voids. The edges need to be sealed twice, including metal bolts to be treated for corrosion resistance, and the workload will be greatly increased.

There are also some products that will use both connections, also known as hybrid connection, that is, the way of glue and metal connection, which will make the performance of the entire connection more temperature, of course, the price will be higher, for If you need carbon fiber products, you are welcome to come to consult. Be-cu Prototype is a manufacturer specializing in carbon fiber products. It has ten years of rich experience in the carbon fiber field. It is engaged in the production and machining of carbon fiber products. The machine is also perfect and can complete the production of various types of carbon fiber products, which can be customized according to drawings.

 

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.

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The Working Principle And Classification Of CO2 Laser


The carbon dioxide laser was first used in 1964 with a wavelength of 10.6 μm. Because this is a very efficient laser, with a conversion efficiency of 10% as a commercial model, CO2 lasers are widely used for laser cutting, welding, drilling and surface treatment. As a commercial application laser up to 45 kW, this is the most powerful material processing laser available.

1.Operating Principle


A carbon dioxide laser is a molecular laser. The main substance is carbon dioxide molecules. It can manifest various energy states depending on its vibration and rotation patterns. The basic energy network is shown in Figure 1. The gas mixture in carbon dioxide is a plasma (plasma) formed from a low pressure gas (usually 30-50 Torr) due to the release of electrons. As the Maxwell-Boltzmann distribution law states, in a plasma, molecules exhibit a variety of excited states. Some will exhibit a high energy state (00o1) which behaves as an asymmetrically oscillating state.The molecule also occasionally loses energy when colliding with a hollow wall or emanating naturally. By naturally emitting this high-energy state drops to a symmetrical wiggling state (10o0) and emits photons (a beam of 10.6 μm wavelength) that may travel in any direction.

The Working Principle And Classification Of CO2 Laser

Occasionally, one of these photons will travel down the cavity along the optical axis and will also wiggle in the resonance mirror.

In general, the working substance of CO2 lasers is a mixture of carbon dioxide, helium, and nitrogen. Nitrogen acts as a buffer gas and its molecules resonate to deliver stimulating energy to carbon dioxide molecules. Since the relaxation level (01110) is the bottleneck, the helium acts as a thermal gullet to transfer energy to the level (01110) to the helium atoms.

2.The Types Of Carbon Dioxide Lasers


The way waste heat is rejected has a large impact on laser system design. In principle, there are two possible ways. The first method is based on the automatic processing of naturally diffusing hot gas to the pipe wall, and the operating principle is the sealing and slow axial flow laser. The second is based on gas forced convection, which operates on the principle of fast axial flow laser. In general, there are five main types of CO2 lasers:

  • Sealed or flowless
  • slow axial flow
  • Fast axial flow
  • fast lateral flow
  • Laterally Excited Atmosphere (TEA)

Sealed or flowless CO2 lasers are often used for beam deflection laser marking. Its discharge tube is completely sealed. The quality of this laser beam is very good. And in most cases the entire discharge tube can be replaced with a new one and the old one can be refilled so it is easy to maintain. This eliminates the need for a separate gas supply system. Only need to make fewer connections at the laser head. So it’s both tight and lightweight. But its energy output is low (usually less than 200 watts).

TEA CO2 lasers are commonly used in shield fabrication. Operate only in pulsed situations. Air flow is low and air pressure is high. The excitation voltage is about 10,000 volts. This laser beam energy distribution is uniform over a relatively large area. Its highest energy can reach up to 1012 watts and its pulse width is very small. However, this form of laser is difficult to focus on small spots due to multi-state operation.

3.The Power Supply Of The Pump


For CW CO2 lasers, there are generally three main ways to power the pump. For example: direct current (DC), high frequency (HF), radio frequency (RF). The DC Power Supply is the easiest to design. Electrons alternate between frequencies of 20-50 kHz in high frequency powered mode. High-frequency power supplies are compact in size and more efficient than direct current. In RF power supply electrons alternate between frequencies of 2 to 100 MHz. Compared with direct current, its voltage and efficiency are lower.

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