Reverse tool machining method in machining

Abstract

The invention discloses a reverse tool machining method in machining. The method comprises the following steps of S1, winding a circle of steel wire at the left end of a slender shaft to be machined,and clamping by using a three-jaw self-centering chuck to reduce the contact area so that the position of a workpiece in the chuck can be freely adjusted; S2, changing a lathe tailstock tip into an elastic tip; and S3, changing the feeding direction to enable a saddle moves from a spindle box to a tailstock, and pulling the workpiece. According to the method, a circle of steel wire is wound at theleft end of the slender shaft, the three-jaw self-centering chuck is used for clamping, the contact area is reduced, the position of the workpiece in the chuck can be freely adjusted, bending momentis prevented from being formed during clamping, deformation generated in the cutting process cannot generate internal stress due to clamping of the chuck, the tailstock tip is changed into the elastictip, and when the workpiece linearly expands and extends due to cutting heat, the tip can automatically retreat, so that bending deformation caused by thermal expansion can be avoided.

Description

technical field [0001] The invention relates to the technical field of back knife machining, in particular to a method for back knife machining in machining. Background technique [0002] The rigidity of the slender shaft is very poor. Improper clamping during turning can easily cause bending deformation and vibration due to the action of cutting force and gravity, which will affect the machining accuracy and surface roughness. The thermal diffusion performance of the slender shaft is poor. Under the action, there will be considerable linear expansion. If the two ends of the shaft are fixed supports, the workpiece will be bent due to elongation. Because the shaft is longer, the time for one tool pass is long, and the tool wear is large, which will affect the geometric shape accuracy of the part. SUMMARY OF THE INVENTION [0003] The object of the present invention is to solve the shortcoming existing in the prior art, and propose a kind of method of counter-tool machining...

AI Technical Summary

Problems solved by technology

[0002] The rigidity of the slender shaft is very poor. Improper clamping during turning can easily cause bending deformation and vibration due to the action of cutting force and gravity, which will affect the machining accuracy and surface roughness. The thermal diffusion performance of the slender shaft is poor. Under the action, there will be considerable linear expansion

If the two ends of the shaft are fixed supports, the workpiece will be bent due to elongation. Because the shaft is longer, the time for one tool pass is long, and the tool wear is large, which will affect the geometric shape accuracy of the part.