Milling cutter provided with groove width gradual change type chip breaker groove

Abstract

The present invention is applicable to the technical field of milling cutters, and discloses a milling cutter with a gradually changing chip breaker in groove width, comprising a milling cutter body, the milling cutter body including a handle part and a cutting edge part connected to the handle part, the The blade portion has at least two main helical grooves and at least one chip breaker groove, the direction of rotation of the chip breaker groove is opposite to that of the main helical groove, and the width of the chip breaker groove starts from the width of the blade portion The blade tip direction decreases toward the blade root direction, the helix angle of the main helical flute ranges from 20° to 45°, and the helix angle of the chipbreaker flute ranges from 20° to 85°. The milling cutter provided by the present invention has a chip breaker with gradually changing groove width. The width of the chip breaker is gradually reduced from the front to the rear. While ensuring the overall chip removal space of the tool, the dust removal at the tip of the tool is also emphasized. Space, to solve the phenomenon of dust clogging at the tip of the tool, the quality of the edge processing is good, and it can reduce the wear of the tool, which is beneficial to prolong the service life of the tool.

Description

technical field [0001] The invention belongs to the technical field of milling cutters, in particular to a milling cutter with a gradually changing chip breaker. Background technique [0002] With the development trend of light weight, miniaturization and high reliability of electronic system products, the wiring density of glass fiber cloth used in the production of highly integrated and multi-layer printed circuit board (PCB) boards is becoming more and more dense. As a result, milling is more difficult, copper foil chips are wrapped around the knife and glass fiber chips are difficult to remove, resulting in poor chip removal during PCB milling, which in turn leads to short tool life and board edge burrs after processing. Contents of the invention [0003] The object of the present invention is to overcome the disadvantages of the above-mentioned prior art, and provide a milling cutter with a gradually changing chip breaker, which has good chip removal effect, good edge...

AI Technical Summary

Problems solved by technology

[0002] With the development trend of light weight, miniaturization and high reliability of electronic system products, the wiring density of glass fiber cloth used in the production of highly integrated and multi-layer printed circuit board (PCB) boards is becoming more and more dense. As a result, the difficulty of milling is increased, and the copper foil chips are wrapped around the knife and the glass fiber chips are difficult to remove, which leads to poor chip removal during the milling process of the PCB, which in turn leads to short tool life and burrs on the edge of the board after processing.

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