The requirements of the large back feed rate slow feed process for grinding machines

Based on the characteristics of large back feed slow feed grinding, the following main technical issues should be considered in the design of slow feed grinding machines:

① The creep feed grinding with large back cut will produce a large grinding force, so the machine tool must have sufficient rigidity and spindle transmission power. The spindle generally adopts hydrostatic bearing.

② The slow feed mechanism adopts mechanical transmission, and the longitudinal feed speed of the workbench is 20-300mm. min - ¹， It is required to be stable and free from crawling.

③ The static and dynamic stiffness of the machine tool is good, and the thermal deformation is small. The stiffness of the process system is one of the reasons for workpiece processing errors. When grinding with a slow feed grinding machine, the grinding force is high, and a reasonable cross-sectional shape of the bed and the stiffness of the bed and column should be considered. The guide rail should be conducive to reducing critical speed, preventing crawling, and ensuring smooth operation.

④ There are special requirements for cooling, flushing, and filtering devices during slow feed grinding with large back feed. The grinding debris generated by the large back feed and slow feed grinding is fragmented and fine, which can easily adhere to the surface of the grinding wheel and cause the grinding wheel to block. The contact arc between the grinding wheel and the workpiece is long, making it difficult for the grinding fluid to enter the grinding area and easily causing surface burns. To effectively suppress temperature rise and ensure sufficient supply of grinding fluid in the grinding area, reasonable liquid supply methods and cooling devices should be used.

⑤ Adopting an advanced CNC control system with fast data processing capabilities and high functionality, it can achieve high-speed interpolation and program segment processing, as well as effective advanced processing capabilities.

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