Compared with the chip free process, precision mechanical (cutting) machining has the advantages of high material removal rate and good economy. For example, compared to laser plasma processing technology, this technology currently requires greater energy to achieve higher material removal rates; On the other hand, there are still issues with whether the processed workpiece can meet the requirements of dimensional and shape accuracy. Chip free stamping is mainly used for large-scale production. In order to ultimately obtain a qualified workpiece shape, most subsequent cutting processes are required. Therefore, the main advantage of mechanical processing is to achieve high precision of the workpiece.

Precision machining is widely used, especially with the production trend of a small amount of tendons, the requirements for the shape and dimensional accuracy of workpieces are becoming higher and higher, opening up new and broader fields for mechanical processing. The use of a lathe requires various turning processes, but attention should also be paid to machining techniques such as drilling, milling, grinding, and tooth picking. This is the processing method for milling center composite machine tools.

Precision detection of mechanical processing requires corresponding detection techniques, combining processing and detection. The inspection of precision machining includes offline inspection, in place inspection, and online inspection. Offline inspection refers to sending the workpiece to the inspection room for inspection after processing is completed; In place inspection refers to on-site inspection without removing the machine tool after processing. If any problems are found, it is easy to reprocess; Online inspection is carried out during the machining process to actively control and implement dynamic error compensation.

Error compensation is an important measure to improve machining accuracy and is the foundation for achieving a certain level of precision in machine tool manufacturing. Separate the influence error with an error compensation device and compensate for the error value. Among them, static error compensation is based on pre calculated error values and is compensated by hardware or software during the machining process. For example, the pitch error of the machine tool feed screw can be compensated by modifying the size; Dynamic error correction is based on online detection and can be corrected in real-time during processing.

Online detection compensation technology is a key technology for ensuring the quality of precision machining. Integrating detection technology into the content of precision machining, using online measurement methods, enables operators to promptly detect problems in the workpiece and provide feedback to the CNC system. A sampling survey shows that the economic losses caused by product quality issues in China, such as scrap, substandard, and repaired products, are about 10% to 15% of the output value. The most direct economic benefits of applying online measurement technology to precision machining are saving labor hours and improving measurement accuracy. In addition, by utilizing the functions of the machine tool CNC system, the CNC system can timely obtain feedback information from the detection system, correct system errors and random errors in a timely manner, change the motion of the machine tool, better ensure machining quality, and promote the development of integrated machining measurement.