Induction hardening tooling for outer shell of disc six-hole type cage constant velocity universal joint

Abstract

The invention discloses an induction hardening tooling for an outer shell of a disc six-hole type cage constant velocity universal joint. The induction hardening tooling comprises a base and a seal disc, wherein a straight shank is arranged at the bottom of the base; the seal disc is fixedly mounted on the base; a cavity is formed in the position, below the seal disc, of the base; a through hole is formed inside the straight shank; a counter bore is formed in the seal disc; a plurality of water spraying pillars are fixedly connected around the counter bore; blind holes are formed inside the plurality of water spraying pillars; and water spraying holes are formed in the inner side walls of the plurality of water spraying pillars. According to the induction hardening tooling, the purposes that the hole walls of six holes of a workpiece are effectively cooled, and the temperature is reduced are achieved; the edges of the six holes of the workpiece are prevented from generating cracks due to the high temperature penetrating actions of the inner cavity and six grooves when the workpiece is subjected to medium-frequency induction hardening; depths of hardening layers of the inner cavity and the six grooves of the workpiece are guaranteed to reach an effective range; the uniformity of clearances between the hole walls of the six holes and the water spraying pillars can be guaranteed through self centering; and the cooling water pressure and quantity received by the six holes of the workpiece can be guaranteed to be uniform.

Description

technical field [0001] The invention relates to the field of tooling for processing a shell of a disc six-hole type constant velocity universal joint, in particular to an induction hardening tool for a disc six-hole type constant velocity universal joint shell. Background technique [0002] Due to its unique ability to maintain the constant angular speed transmission torque of the two connecting shaft angles of different shafts, the constant velocity universal joint has a compact structure, efficient torque transmission, and has the ability to freely adapt to the distance between the two shaft ends. Changing requirements, so it is widely used in automobile drive shafts. The disc six-hole ball cage constant velocity universal joint is a variant of the ordinary joint with a splined shaft. The splined shaft can be used as a non-replaceable part because it is not easily damaged, and the easily damaged disc part is separated. , but also more suitable for intermediate drive shaft...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a disc six-hole type ball cage constant velocity universal joint shell induction hardening tool to overcome the defect that the existing intermediate frequency induction hardening will cause cracks on the edge where the six holes of the workpiece meet the arc groove. By continuously applying pressure to the inside of the six holes of the workpiece, the cooling water circulation keeps the temperature of the hole wall below the tissue transformation temperature. At the same time, the medium frequency induction quenching heating temperature of the six arc grooves in the inner cavity of the workpiece is not affected, ensuring that no cracks occur on the edge of the hole. And the phenomenon of stress concentration, so that the spherical surface of the inner cavity and the six arc grooves can be freely quenched by intermediate frequency induction and meet the technical requirements of the required depth of hardened layer and surface hardness

Images