Thermal treating processing method of spring stop rings and special tempering tool of thermal treating processing method

Abstract

The invention relates to a thermal treating processing method of spring stop rings and a special tempering tool of the thermal treating processing method. The thermal treating processing method comprises the following steps of stringing the spring stop rings which are thoroughly cleaned into strings, loading the strings into a vacuum quenching material frame, transporting the vacuum quenching material frame into a vacuum quenching furnace for quenching, and before heating in the vacuum quenching furnace, performing vacuumizing; heating the equipment to 650-670 DEG C, performing insulating for20-30min, and performing heating to the quenching temperature of 860-870 DEG C for quenching; then transporting the spring stop rings into a cold chamber, performing quenching oil cooling, performingcooling in an oil groove until the temperature is 100 DEG C or below, performing discharging from the furnace, and performing air cooling to the room temperature; and then loading the spring stop rings to the tempering tool, performing shaping tempering, enabling the spring stop rings to be sleeved into a screw rod, performing thermal rectifying with a pressing plate through nuts, performing feeding in the furnace for tempering, and performing tempering and water-cooling to the room temperature. Through the adoption of the thermal treating processing method disclosed by the invention, the defect that after the spring stop ring is used after being quenched, brittleness breaking is generated is solved, the deformation of the spring stop rings is reduced, the planeness of the spring stop rings is improved, and in the subsequent assembling and using course, the spring stop rings are avoided from generating cracks.

Description

technical field [0001] The invention belongs to the field of metal heat treatment, and in particular relates to a heat treatment processing method for a 60Si2MnA spring retaining ring. Background technique [0002] The spring retaining ring is generally used as a dial-back function in the product insertion mechanism, mainly through elastic repeated operation to achieve the purpose of use. During use, the workpiece mainly bears the role of extrusion elastic deformation, plays the role of cushioning and spring recovery, and has elasticity Well, high hardness and other characteristics. Usually, the purpose of workpiece insertion is achieved through elastic deformation storage capacity and elastic recovery. The main scope of use is within the hardness range of 45~55HRC. In the prior art, after the initial heat treatment method is heated in a salt bath furnace, due to the inconvenient control of the processing parameters, the hardness after heat treatment is generally between 4...

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Problems solved by technology

[0003] In order to solve the technical problems in the current production process, the purpose of the present invention is to provide a method to solve the problem of brittle fracture of the spring retainer after quenching, reduc

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