Anti-seepage sleeve of gear shaft

Abstract

The invention discloses an anti-seepage sleeve of a gear shaft. The anti-seepage sleeve comprises a sleeve body (1), wherein a circle (2) is arranged at an opening of the sleeve body (1); the bottom of the sleeve body (1) is provided with a thread (3); and a step (4) is arranged between the thread (3) and the circle (2). The anti-seepage sleeve of the gear shaft, which is used in quenching, has the advantages of being convenient to mount and improved in anti-seepage quality, increasing the production efficiency and saving energy.

Description

technical field [0001] The invention relates to a gear shaft anti-seepage sleeve. Background technique [0002] In the process of manufacturing automobile gear shafts, heat treatment is a necessary process. In order to improve the surface wear resistance, fatigue strength, and core toughness of the gear shaft, carburizing and quenching is usually used, and the hardness of the threaded part must be controlled to ensure that it cannot exceed 38HRC to ensure the toughness of the thread and avoid the breakage of the thread. and fractures at the thread. Now, in order to control the thread hardness, it is usually used to apply anti-seepage agent on the thread and then carburize and quench, or to anneal at the thread section after carburizing and quenching. Carburizing and quenching after coating the anti-seepage agent on the thread increases the amount of labor, and the anti-seepage agent is a fluid substance, which may cause deviations in the anti-seepage area, which cannot ach...

AI Technical Summary

Problems solved by technology

Carburizing and quenching after coating the anti-seepage agent on the thread increases the amount of labor, and the anti-seepage agent is a fluid substance, which may cause deviations in the anti-seepage area, which cannot achieve product consistency, and the appearance of the product has obvious anti-seepage Traces; using intermediate frequency quenching after carburizing and quenching also increases the process and requires investment in intermediate frequency equipment, which requires high equipment and personnel, and intermediate frequency annealing wastes energy

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