Heat treatment method for check ring for automobile steering gear and clamp thereof

Abstract

The invention discloses a heat treatment method for a check ring for an automobile steering gear and a clamp thereof. The efficiency is high, and the quality is stable and reliable. The clamp comprises a stringing rod, wherein a positioning head is arranged at one end of the stringing rod, threads are arranged at the other end of the stringing rod and matched with a nut in a threaded mode, an upper lining pipe and a lower lining pipe are sleeved between the head of the stringing rod and the nut, a stringing positioning space of the check ring is formed between the upper lining pipe and the lower lining pipe, and the stringing rod, the positioning head, the nut, the upper liner tube and the lower liner tube are made of non-magnetic steel. The heat treatment method comprises the steps that the check ring is clamped through the clamp and installed in a numerical control quenching machine tool; through induction heating, all the check rings on the clamp are subjected to integral water spraying quenching and tempering, and the tempering hardness of the check rings is controlled according to the adjusted electrical parameters and thermal parameters; and in the quenching and tempering process, the numerical control quenching machine tool drives the clamp to rotate, all parts of the check rings are evenly sprayed with water and heated, the numerical control quenching machine tool drives the clamp to do reciprocating motion in the axial direction, and all the check rings are sprayed with water and heated.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment method for a retaining ring for an automobile steering gear and a fixture thereof. Background technique [0002] With the continuous expansion of the passenger car market, people's requirements for improving the quality of cars are becoming more and more urgent. The abnormal sound of the car steering gear is an important indicator for judging the quality of the car, and the gear assembly of the car steering gear During use, the riveting between the gear and the bearing is loose, and the metal impact sound caused by the axial movement of the gear is the main factor for the abnormal noise of the steering gear. The processing quality of the retaining ring directly affects whether the bearing is fastened or not, and directly affects the abnormal noise of the steering. The strength and hardness of the retaining ring are not enough, once it is deformed and loose...

AI Technical Summary

Problems solved by technology

[0004] Directly use raw materials without heat treatment. The hardness is about 140HBW. The hardness is low, the strength is low, and it is easy to deform. The retaining ring is loose, which cannot prevent the gear from moving, causing abnormal noise of the steering gear or steering safety accidents.

[0005] The conventional quenching and tempering method adopts periodic heat treatment furnace, bottom charging furnace, or salt bath furnace or box furnace, which has the problems of inconvenient clamping, uneven hardness, large deformation and low efficiency

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