Grooving insert and cutting tool thereof

Abstract

The invention discloses a groove processing blade and a cutting tool thereof. The blade is composed of an upper positioning surface, a lower positioning surface, two side surfaces and two end surfaces connecting the upper and lower positioning surfaces, and the upper positioning surface, the lower positioning surface The surface is symmetrical about the mid-side plane of the center of the two sides. In the plane parallel to the side surface, there is the same distance between the upper positioning surface and the lower positioning surface. The cutting part of the cutting tool is provided with a sipe, and the sipe is composed The clamping surface, the support surface and the back support surface are composed, and the upper and lower positioning platforms and the sipe of the cutting blade cooperate with the clamping surface, the support surface and the back support surface of the cutting tool respectively. The insert has the characteristics of clamping stability and improved positioning accuracy of the insert, and the cutting tool equipped with the insert has the characteristics of high positioning accuracy, reduced cutting vibration, high cutting efficiency and long service life.

Description

technical field [0001] The invention relates to the field of metal cutting, in particular to a grooving insert with a stable positioning structure and long service life and a cutting tool with low size requirements. Background technique [0002] The positioning of the grooving blade in the up and down direction is realized by the upper and lower positioning surfaces of the blade. The upper and lower positioning surfaces of the blade are usually designed as a pair of convex or concave surfaces and matched with the paired and corresponding concave positioning surfaces or convex surfaces. The cutter body with the type positioning surface is used to process various groove types. figure 1 What is shown is a cutter structure in the prior art in which the blade is a concave positioning surface, and the cutter body is a convex surface for matching positioning. This kind of blade is easy to manufacture and easy to use; at the same time, the contact positioning method of the convex s...

AI Technical Summary

Problems solved by technology

Generally, the inserts for grooving are cemented carbide inserts, which are often deformed during sintering. When the inserts are assembled on the cutter body, it is difficult to completely contact the upper and lower positioning surfaces, especially for cutting inserts with small cutting widths. During the cutting process, the inserts are deformed. Especially serious, the upper and lower positioning surfaces of the blade and the positioning of the cutter body may contact at the protruding part of the blade deformation

When the protruding part is in the middle of the blade, the blade will lose the positioning effect in the side direction. When the blade is cutting sideways, the blade will be quickly worn or broken due to unstable clamping; when the protruding part is in contact with the edge of the blade , the edge load of the upper and lower positioning surfaces of the blade is too large, and the wall thickness between the upper and lower positioning surfaces of the blade and the side is too small, and the shear stress of the upper and lower positioning surfaces of the blade is too large, which is very easy to cause the blade to collapse in the direction of the upper and lower positioning surfaces

When the blade deformation is serious, even if the protruding part of the upper and lower positioning surfaces of the blade has a large clamping force, the blade clamping is unstable, and the blade is prone to breakage during cutting, and when the blade is used for rotary tool processing, cutting vibration can cause The blade breaks away from the cutter body and flies out centrifugally, threatening the safety of the operator

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