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

Abstract

The invention is applicable to the technical field of milling cutters, and discloses a milling cutter provided with a groove width gradual change type chip breaker groove. The milling cutter comprisesa milling cutter body; the milling cutter body comprises a cutter handle part and a cutting edge part connected with the cutter handle part; the cutting edge part is provided with at least two main spiral grooves and at least one chip breaker groove; the spiral direction of the at least one chip breaker groove is opposite to those of the at least two main spiral grooves; the width of the at leastone chip breaker groove is reduced from the edge point direction to the edge root direction of the cutting edge part; the range of the spiral angle of each main spiral groove is 20-45 degrees; and the range of the spiral angle of the at least one chip breaker groove is 20-85 degrees. According to the milling cutter provided with the groove width gradual change type chip breaker groove, the widthof the chip breaker groove of the milling cutter is reduced from the front to the back gradually, so that a dust exhaust space of the tip of the milling cutter is expanded emphatically on the condition that an overall chip removal space of the milling cutter is ensured, the dust blocking problem of the cutter tip is solved, the plate edge processing quality is good, the abrasion to the milling cutter can be reduced, and the service life of the milling cutter can be prolonged advantageously.

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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