Four turning-milling compound machining programming technology knowledge points worthy of your learning!

The development of turning-milling composite processing technology also puts forward higher requirements on CNC programming technology, which is also a bottleneck restricting processing equipment in actual production. Due to the relatively short time required to convert milling compound processing into actual production, in the absence of professional compound processing solutions, general-purpose CAM software is usually used to plan part of the processing program, and then the processing personnel will perform manual integration to meet the program requirements The processing program of the compound processing machine tool. This solution puts high demands on the craftsman.

Compared with traditional CNC programming technology, the programming difficulties of turning-milling compound machining are mainly reflected in the following aspects.

(1) There are many kinds of handicrafts. For craftsmen, not only must master the programming methods of various machining methods (such as CNC turning, multi-axis milling and drilling), but also must accurately define the relationship between the process and the way of advance and retreat. Therefore, when performing CNC programming, it is necessary to have an intuitive understanding of the current machining model and the distribution of machining allowances in order to facilitate the next machining programming and advance and retreat settings. tool.

(2) The serial and parallel sequence in the programming process must be determined strictly according to the process path. When many parts are processed on a machining center, they can be processed from wool into finished products. Therefore, the compiled result of the processing program must be consistent with the processing path. At the same time, multi-channel parallel processing needs to be considered comprehensively in the process of CNC machining programming. It can be seen that in order to achieve effective compound processing, a process solution integrated with process programming simulation should be developed.

(3) The current general-purpose CAM software does not yet support some functions of turning-milling compound processing. Compared with the traditional single-equipment processing, the machine tool movement and processing functions of the turning-milling combined processing are much more complicated. The current general-purpose CAM software is not enough to fully support the programming of these advanced functions, such as online measurement, sawing, automatic feed, tailstock control, etc. Therefore, programs compiled with general-purpose CAM software still require a lot of resources. It is a manual or interactive method applied to manual turning and milling combined processing.

(4) Integration of processing procedures. At present, NC programs compiled by general-purpose CAM software are independent of each other. In order to achieve complex automation and complete machining (such as turning and milling), these independent machining programs must be integrated and integrated. This integration must be guided by the process route of the part. First, determine which programs are parallel, and then determine the processing sequence of different processing methods, and give accurate tool replacement, card replacement, benchmark conversion, and advance and retreat instructions to wait.

It can be seen that it is very difficult to write CNC programs for turning-milling combined processing, and the current general-purpose CAM software for turning-milling combined processing still has many defects and deficiencies. In order to make up for these shortcomings, it is a more realistic solution to develop a special programming system suitable for product technology and compound processing equipment based on the existing general CAD/CAM software. This aspect reduces the repeated investment in software purchases, and at the same time avoids defects such as the inability to reuse process knowledge and complex staffing due to inconsistent programming platforms.

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