With the development of digital design and manufacturing technology, some shortcomings of ISO6983 gradually emerged: the numerical control program written by ISO6983 only contains a part of the information in the CAD/CAM system, some information is lost in the transmission and exchange; only some simple Linear and circular interpolation limits the improvement of machining quality and machining speed; ISO6983 and its extensions do not allow bidirectional data exchange between different CNC machines and computer-aided systems (CAX), which limits the processing of high-speed information. Integration; many extensions developed by vendors and end users have not been standardized.
Although ISO6983 is currently widely accepted and used worldwide, for high-speed cutting, this traditional programming interface has become a bottleneck for its further development. The design idea and structural framework design of high-speed cutting CNC programming system is to provide users with a software prototype system with simple input, easy to grasp and friendly man-machine interface. According to the characteristics of high-speed cutting, the prototype system performs process planning through human-computer interaction, and finally realizes the generation of STEP-NC program or the generation of ISO6983 program.
The overall design is the key to software development, and its rationality and effectiveness directly affect the quality of the software. According to the mission, requirements and characteristics of the target system, the high-speed cutting CNC programming system adopts a modular system approach. Each module is relatively independent in order to facilitate system maintenance and function expansion. And considering that the existing CNC system and machine tool do not support STEP-NC, the output of the programming system has two forms of CNC system.
High-speed cutting CNC programming system integration scheme CAD system adopts STEP geometric data format design, CAM output NC program has two forms. One is to generate the G code through the post processor, and the other is to generate the STEP-NC NC program and send it to the open CNC. There is also an alternative way to use the STEP standard to feed directly into the open CNC from the CAD to the shop floor programming system via the STEP-NC structure.
Conclusion Through the above research on the status quo and characteristics of high-speed cutting, a new NC machining programming strategy is proposed. On the basis of the common NC machining programming strategy, the residual machining model suitable for high-speed cutting and the advance and retreat knives suitable for high-speed machining are proposed. The tool path planning method, such as the tool path method, analyzes the limitations of the current CNC programming interface ISO6983. Through the research on the high-speed machining numerical control programming technology, the high-speed cutting CNC programming prototype system is developed. Due to the research of the new NC programming data interface STEP-NC at home and abroad is just getting started, there is not much information to be referenced, plus the limitations of hardware and software. Therefore, the research on the high-speed cutting CNC programming system still has some shortcomings. further improvement.
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