Processing method of heat treatment jig for thin ring piece and spring steel thin tooth piece

Abstract

The invention discloses a thin ring part heat treatment fixture which comprises a partition plate, a core rod, an upper mould plate and a lower mould plate, wherein the upper mould plate and the lower mould plate are oppositely arranged; a plurality of thin ring parts are stacked to form a plurality of thin ring part groups, and every two adjacent thin ring part groups are spaced by the partition plate; the partition plate is provided with a plurality of liquid holes, and the liquid holes are communicated with the annular end surfaces of the two adjacent thin ring part groups; the upper mould plate and the lower mould plate are both provided with first installation holes, and fasteners penetrate through the first installation holes of the upper mould plate and the lower mould plate and the liquid holes to clamp the partition plate and the plurality of thin ring parts between the upper mould plate and the lower mould plate. The invention also discloses a processing method of a thin spring steel tooth blade. The thin ring part heat treatment fixture disclosed by the invention can be used for improving the planeness of the thin ring parts subjected to quenching and tempering.

Description

technical field [0001] The invention relates to the technical field of heat treatment technology and its auxiliary equipment, in particular to a heat treatment fixture for a thin circular ring and a processing method for a spring steel thin tooth piece. Background technique [0002] Spring steel thin gear parts, the material is 65Mn or other spring steel, with internal or external teeth, the outer diameter is more than 200mm, and the thickness is 1.5-4mm. Spring steel thin gear parts have strict requirements on the thickness difference, and the dimensional tolerances of the teeth have higher requirements. At the same time, heat treatment hardness is required to reach HRC26-32. Since the thin tooth piece is a thin plate with a large size, it is easy to produce elliptical deformation during heat treatment, and it is difficult to guarantee the flatness. At the same time, spring steel has temper brittleness. [0003] The traditional process methods are as follows: the first m...

AI Technical Summary

Problems solved by technology

Since the thin tooth piece is a large-scale thin plate part, heat treatment is prone to elliptical deformation, and it is difficult to guarantee the flatness

At the same time, spring steel has temper brittleness

[0003] The traditional process methods are as follows: the first method is to use the combination of wire cutting and machining, which has low production efficiency and high production cost; heat treatment

Due to the out-of-round deformation during the heat treatment process of this method, the diameter of some dedendum circles is too small, and the parts need to be scrapped, while the diameter of the other part of the dedendum circle is too large, which requires additional partial tooth cutting and manual sizing procedures, which seriously affects the production of products. schedule and cost

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