Clamp for machining hard alloy broach

Abstract

The invention discloses a clamp for machining a hard alloy broach. The clamp comprises a base, a first reference surface and a second reference surface, wherein the first reference surface and the second reference surface are arranged on the base; a first included angle formed between the length direction of the first reference surface and the horizontal plane is equal to an included angle between the front edge surface of a broach chip containing groove and the vertical end surface of the broach; and a second included angle formed between the width direction of the first reference surface and the horizontal plane is equal to an included angle between the bottom surface of the chip containing groove and the symmetrical center line of the broach, and the composite angle of the chip containing groove is decomposed into two single angles. A third included angle is formed between the first reference surface and the second reference surface, the broach is calibrated through the two reference surfaces, so that the position of the chip containing groove is in a vertical state, linear cutting machining is facilitated, the linear cutting machining procedure is simplified, and the machining efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing cutting tools for aero-engines, in particular to a fixture for processing cemented carbide broaches. Background technique [0002] The broaches are one of the important process equipments for the manufacture of aero-engine discs, and the commonly used materials are high-speed steels. Carbide broaches are obviously better than high-speed steel broaches in terms of ensuring the surface accuracy and service life of parts, and are a good substitute for high-speed steel. Due to the high hardness of cemented carbide materials, it cannot be processed conventionally like high-speed steel, which makes it difficult to manufacture cemented carbide broaches, so it has not been widely used. In the manufacture of carbide broaches, the processing of chip pockets is one of the difficulties in manufacturing. [0003] The processing method currently used is wire cutting. Some carbide broaches can be placed...

AI Technical Summary

Problems solved by technology

However, for most carbide broaches with profiled surfaces, the bottom of the chip flute is not parallel to the center line of the broach, and forms an angle. It is difficult to place it directly on the wire cutting machine to cut out. It must be assisted by designing and manufacturing fixtures. Therefore, the fixture Difficulties in designing a broach

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