End mill used for processing titanium alloy

Abstract

The invention discloses an end mill used for processing titanium alloy. A mill body adopts superfine particle hard alloy containing 10%-12% of Co content, a blade part of the mill body is provided with four unequal cutting edges, the inclined angles between the four cutting edges are respectively 86 degrees, 94 degrees, 86 degrees and 94 degrees, an helical angle is 30 degrees-50 degrees, the thickness of a mill core is 60%-65% of the diameter of the mill core, a radial rake angle is 5-10 degrees, a rear angle is 11-13 degrees, and a radial rear angle is of an arc-shaped structure; an axial rake angle is 5 degrees, an axial rear angle is 7 degrees, a centripetal angle of an end cutting edge is 1.5 degrees, the two cutting edges pass the center, an inclined angle between a chip breaking slot and an axis is 60-70 degrees, the chip breaking slot extends to 0.25-0.35mm position of an external diameter cutting edge, and a tool nose is provided with a 0.12-0.15*45-degree closed angle protector; and the cutting edges are processed by passivation, the passivating degree R is 0.005m, and (Al, Ti) N coating layers are coated on the surfaces of the cutting edges. When the end mill is used for processing materials such as titanium, titanium alloy, heat-resistant steel and the like, the end mill has the advantages that the cutting effect is good and the service lives of tools are long.

Description

technical field [0001] The invention relates to a machining tool, in particular to an end mill for processing titanium alloy. Background technique [0002] At present, in the processing of titanium and titanium alloys, due to the characteristics of low thermal conductivity, severe work hardening, low elastic modulus, and high chemical activity of this metal material, it is regarded as a difficult-to-machine material. In milling, ordinary carbide end mills are difficult to do, and its difficult machining becomes a thorny problem in production. Due to the large amount of cutting heat generated during the machining process, most of which remain in the tool, resulting in rapid wear of the tool, work hardening occurs on the surface of titanium alloy parts, which affects the fatigue resistance and geometric accuracy of the part. In heavy-duty cutting, due to the low elastic modulus of titanium alloy, it will cause deformation and vibration. For example, when processing under high...

AI Technical Summary

Problems solved by technology

In milling, ordinary cemented carbide end mills are difficult to do, and its difficult machining becomes a thorny problem in production

Due to the large amount of cutting heat generated during the machining process, most of which remain in the tool, resulting in rapid wear of the tool, work hardening will occur on the surface of titanium alloy parts, affecting the fatigue resistance and geometric accuracy of the part

In heavy-duty cutting, due to the low elastic modulus of titanium alloy, it will cause deformation and vibration. For example, when processing under high temperature conditions, the titanium tool material and the tool have a tendency to undergo chemical reactions, which will accelerate tool wear and shorten the tool life. service life

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