Disposable cutting insert locking structure

Abstract

A disposable cutting insert locking structure is disclosed and includes a shank and a disposable blade. A tool apron is disposed at a front end of the shank. The tool apron has a positioning seat. Thepositioning seat has a V-shape. The positioning seat is provided with a screw hole. The disposable blade has a bottom. The bottom is formed with a positioning recess. A bolt hole is arranged in the positioning recess for a screw to be inserted from a top of the disposable blade and screwed to the tool apron. The central point of the bolt hole of the disposable blade and the central point of the screw hole formed in the tool apron have a small offset; when the disposable blade is locked on the tool apron, the disposable blade slightly deviates upwards, so that the positioning groove of the disposable blade and the positioning seat of the shank form V-shaped surface contact and are mutually pressed and jointed, the mutual pressing and locking positions of the positioning groove and the positioning seat are very close to the position of a tail end tool nose, and the assembly rigidity is effectively improved.

Description

technical field [0001] The invention relates to a support positioning structure design when a disposable blade is locked with a tool holder of a tool, in particular to an improved locking structure of a disposable blade. Background technique [0002] When the discarded blade 32 cuts, the cutting force F generates a moment M (FR) from the position of the tool tip to the screw 33 of the discarded blade 32 (such as Figure 13 , Figure 14 As shown), the phenomenon of deflection of the discarded blade 32 is caused, and the position of the tip of the discarded blade 32 is angularly offset, which affects the size of the cutting and the surface roughness of the workpiece, and even affects the service life of the tip; if When cutting workpieces with wavy groove appearance, such as Figure 14 As shown, the blades 321, 322 on both sides of the tip of the discarded blade 32 will cut alternately, that is, alternate cutting forces F will be generated, and an alternate moment M (FR ), w...

AI Technical Summary

Problems solved by technology

[0005] It is known that no matter whether the discarded tool is a discarded turning tool or a discarded milling cutter, there will be a small gap between the discarded insert and the V-shaped side surface. When the discarded insert is cutting, the first cutting edge The cutting force F generates moment from the position of the tool tip to the screw position of the discarded insert, which makes the discarded insert deflect in one direction or alternately deflect left and right, which in turn causes the cutting tool to vibrate, and the surface roughness value will increase. High, dimensional accuracy will decrease and many other deficiencies

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