Negative-type milling blade

Abstract

The invention discloses a negative-type milling blade comprising a blade body, wherein the blade body has an upper surface, a lower surface and a quadrangular peripheral surface and is also provided with a through hole and bosses around the through hole, and a main cutting edge and a smoothing edge are alternately arranged on the peripheral surface in sequence; the main cutting edge has a concave structure and gradually tilts close to opposite surfaces of the upper and lower surfaces from two ends respectively, and a non-tilting smooth middle part of the main cutting edge is formed at a position which is 1 / 6-1 / 3 of the length of the edge on the main cutting edge; and the front tool face of the non-tilting smooth middle part of the main cutting edge of the negative-type blade body is connected to the through hole perpendicular to the upper and lower surfaces by extending at a positive angle gently, and an open scrap accommodating groove leading to the through hole is formed at the bosses. According to the negative-type milling blade disclosed by the invention, by designing of the concave structure of the main cutting edge of the cutting blade and combining the design of a special opening structure groove at a bearing surface chip breaker groove of the blade, cutting force distribution and cutting flowing can be optimized, processing of self breaking scraps can be performed, and the processability and stability of a cutter are improved.

Description

technical field [0001] The invention relates to the field of metal cutting tools, in particular to an indexable negative milling insert for performing plane milling on processed materials. Background technique [0002] In the face milling process, the cutting tool repeatedly performs intermittent machining in the process of cutting in and out. Every time the main cutting edge cuts into the processed material, it will be subjected to a huge impact load, so the structure design of the main cutting edge is reasonable. Sex will have a huge impact on tool cutting performance. [0003] In the prior art, there are three structural forms of the main cutting edge of the indexable insert for face milling: one is that the main cutting edge is designed as a straight line segment and lies parallel to the upper and lower surfaces of the cutting insert; the other is that the main cutting edge It is designed as a straight line section but not parallel to the upper and lower surfaces of the...

AI Technical Summary

Problems solved by technology

1. The disadvantages of the groove structure of the closed chip breaking groove pattern are: (1) the closed chip breaking groove is easy to cause the chip flow in the groove is not smooth enough; (2) the small space in the groove is easy to form small chips in the chip holding Tank accumulation

2. The disadvantages of using a groove structure with a stepped section between the cutting edge surface and the adjacent surface are: (1) The stepped section structure causes the cutting edge to remove more cemented carbide material, which will reduce the overall strength of the cutting edge; (2) The support surface of this structural design is lower than the cutting edge, and chips will pass through the surface of the positioning surface, which is prone to friction and scratches on the support surface, which affects the positioning accuracy

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