Processing method for TC4 titanium alloy spiral groove screw tap

Abstract

The invention provides a processing method for a TC4 titanium alloy spiral groove screw tap. The method comprises the working procedures of blanking, rough turning, finish turning, milling, benching, heat treatment, grit blasting, surface treatment, external grinding working procedure, thread grinding, cutter grinding, relief grinding, laser carving, and the like. In the thread grinding working procedure, a tail of a spiral groove is used as a grinding benchmark, threads are at least fed for three times to grinding and processing, the threads are relief grinded to meet the requirement, and annealing is strictly prevented; in the relief grinding working procedure, different relief grinding manners are adopted according to the actual demands of the production, one manner is that a 0.5-1mm of allowance is kept during relief grinding of a dorsal horn, and another manner is that only the about 0.1mm of allowance is kept during relief grinding of the dorsal horn. Through the adoption of the method disclosed by the invention, the accuracy requirement of the spiral groove screw tap based on the TC4 titanium alloy materials can be effectively ensured, the production efficiency is greatly improved, and even more, the processing problem that a spiral tooth back is a curve tooth surface is perfectly solved.

Description

technical field [0001] The invention relates to a processing method for a TC4 titanium alloy spiral groove tap, belonging to the technical field of tool processing. Background technique [0002] With the development of science and technology and the company's own product needs, some difficult-to-process materials are increasingly used in production, such as TC4 titanium alloy materials, which are between α titanium alloy materials and β titanium alloy materials. It is characterized by high strength at room temperature and high temperature, good plasticity and toughness, can be strengthened by heat treatment, has a wide range of uses, and its machinability is between α titanium alloy and β titanium alloy. Although the TC4 titanium alloy material has superior performance in the processing process, the material has particularly high requirements on the hardness, wear resistance and red hardness of the tool. [0003] Based on the advantages of TC4 titanium alloy material, TC4 t...

AI Technical Summary

Problems solved by technology

However, because the TC4 titanium alloy material itself has processing difficulties, and the spiral flute tap also has processing difficulties, the processing of the TC4 titanium alloy spiral flute tap has become a difficult problem.

It is difficult to meet the precision requirements of the TC4 titanium alloy spiral flute tap itself and the precision requirements of the product by using the existing processing method, especially when the relief angle of the spiral flute tap is in the form of an arc, and the relief angle of the tooth profile is in the longitudinal direction of the tooth profile. On the cross-section, and the tooth shape is a spiral form, and the tooth shape changes on the tooth-shaped cross-section

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