In precision CNC machining, what errors might occur?

In the field of precision part machining, CNC machining is a method that controls machine tool movements and processes through computer digitization and information digitization. CNC part machining is also an important indicator for measuring a country's technological development level, comprehensive national strength, and the degree of modernization in information technology, reflecting a nation's capabilities. So, what errors might occur during the CNC part machining process?

Firstly, the principle error in CNC part machining arises from using approximate machining motion modes or approximate tool profiles. As long as the principle error remains within allowable limits, this processing method is still feasible. Manufacturing errors, installation errors, and wear during machine tool usage directly impact the machining accuracy of CNC parts. Key factors include errors in the spindle rotation, linear motion of machine guides, and transmission chain errors.

Secondly, errors in manufacturing, installation, and wear of CNC part machining tools all affect the machining accuracy of the workpiece. During cutting, the cutting edge and cutting surface experience intense friction with the workpiece and chips, leading to tool wear. Errors in CNC part machining fixtures include positioning errors, clamping errors, fixture installation errors, and tool setting errors. These errors are mainly related to the manufacturing and assembly precision of the fixtures.

Lastly, positioning errors in CNC part machining primarily consist of datum misalignment errors and manufacturing errors in the positioning components. When machining a workpiece on a machine tool, multiple geometric features on the workpiece must be selected as positioning datums during the machining process. Positioning component manufacturing inaccuracies only occur in adjustment-method CNC machining and do not appear in trial-cutting method machining.