1. The selection principle of cutting parameters 　　 Whether the selection of cutting parameters is reasonable or not plays a very important role in whether the potential of the machine tool and the cutting performance of the tool can be fully utilized to achieve high quality, high yield, low cost and safe operation.3mm.4mm;

Rough boring αp=1mm, fine boring αp=0. Increasing the amount of back cutting αp can reduce the number of passes, and increasing the feed amount f is beneficial to chip breaking. Selection of cutting amount for bearing sleeve processing (1) Selection of back-cutting amount during rough machining, if the rigidity of the process system and the machine power allow, use as large a back-cutting amount as possible to reduce the number of feeds; When processing, to ensure the processing accuracy and surface roughness requirements of the parts.

Therefore, small (but not too small) back-cutting αp and feed f should be selected when finishing turning, and high-performance tool materials and reasonable geometric parameters should be selected to increase the cutting speed Vc as much as possible.15mm/r; during semi-finishing and finishing, according to the surface roughness requirements, according to the workpiece material, the radius of the tool tip and the cutting speed, select: semi-finishing f=0.75mm,

finishing turning αp=0. Vc =πdn/1000 (2－5) where: n is the rotation speed of the workpiece or tool (r/min) Vc is the cutting 6201 ball bearing speed (m/min) d is the rotation diameter of the workpiece or tool corresponding to the selected point of the cutting edge (mm) Combined with practical experience, the final spindle speed is determined as follows: rough machining n=600 r/min, semi-finish turning n=800 r/min, fine turning n=1000 r/min, fine boring n=700 r/min , Threading n=500r/min..1mm/r. 2.

According to the quality requirements of the machined surface, tool material, workpiece material and machine tool performance, refer to the cutting manual or related materials to select: rough turning outer contour αp=2mm, semi-finishing turning outer contour αp=0.1mm/r, fine boring f=0.2mm/r, rough boring f=0.