Technique for preparing machine holding carbide alloy rack type gear shaper cutter

Abstract

The invention relates to a manufacturing process of a machine-clamped hard alloy rack type cutter; the blade of the cutter chooses YT798 and is pre-punched out a positioning wire hole by an electro discharge drilling machine; a grinder is used for grinding the thickness and the width of two sides of the blade to satisfy the thickness size and the roughness required by the design, and then a wire electro-discharge machining is used for cutting the shape of the blade and a positioning hole used for assembling; AlTiN is coated on the blade evenly; a special fixture is used for finish milling the shape of a blade groove, at last an assembly positioning hole is bored in a coordinated borer. The knife body chooses 42CrMo, and the special fixture is used for milling the knife body shape of the rack type cutter, including clamping sizes and front angles; the hardening and tempering process and the nitrogen treatment are carried out to reach HB265-305, and the special fixture is used for crude grinding and fine grinding the clamping position surfaces and the planes of the front angles of the knife body; a special clamping fixture is used for cutting the tooth shape of the knife body on the wire electro-discharge machining; the tooth shape and back angles are clamped and cut once time. The machine-clamped hard alloy rack type cutter can be formed by finishing and grinding the blade groove through once assembly by template fitters; the manufacturing process of the machine-clamped hard alloy rack type cutter can be applied to the processing of gears with large module and high hardness.

Description

technical field [0001] The invention belongs to the technical field of cutters, in particular to a manufacturing process of a machine-clamped hard alloy comb-toothed cutter. Background technique [0002] At present, the production of general comb-tooth cutter is to adopt high-speed steel material as cutting material, after forging, machining, become the cutting tool for processing gear tooth profile. Compared with high-speed steel, cemented carbide has excellent red hardness and wear resistance, and its cutting performance and wear resistance are better than high-speed steel tools. [0003] The high-speed steel comb cutter can only process materials with heat treatment hardness less than HB320, and cannot process large modulus and high hardness workpieces. Contents of the invention [0004] In order to solve the above problems, the invention provides a manufacturing process of a machine-clamped cemented carbide comb-toothed cutter. The machine-clamped carbide comb-toothed...

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Problems solved by technology

[0004] In order to solve the above problems, the invention provides a manufacturing process of a machine-clamped cemented carbide comb-toothed cutter. The machine-clamped carbide comb-toothed cutter made according to the process can solve the problem of large modulus and high hardness (heat treatment hardness is greater than HRC55) tooth surface gear comb tooth processing problem, overcome the defect that high-speed steel tools cannot process hard tooth surface gear, and improve the machining accuracy of the gear

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