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Process for processing arc-shaped spring

A processing technology and arc-shaped technology, which is applied in the field of arc-shaped spring processing technology, can solve the problems of low yield, unsatisfactory spring consistency, and low production efficiency, and achieve low cost, easy control of parameters, and good results.

Active Publication Date: 2014-04-02
HANGZHOU FUCHUN SPRING
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0018] The invention provides an arc-shaped spring capable of thermally forming a free angle greater than 45 degrees at one time, which has high production efficiency, good consistency of formed springs, and a production process for an arc-shaped spring with stable quality; it solves the problem of large angles in the prior art The yield rate of arc-shaped springs is low, the production efficiency is low, and the spring consistency after forming is not ideal.

Method used

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  • Process for processing arc-shaped spring
  • Process for processing arc-shaped spring

Examples

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Embodiment

[0047] A processing technology for arc springs, which uses OTEVA 75SC material as the raw material for processing, checks the raw materials and eliminates unqualified products, and rolls the spring. The spring coiling is carried out on a computer numerical control spring coiling machine with more than four axes. The steel wire blank is wound into a cylindrical coil spring by tightening the two ends of the spring according to the prefabricated height, outer diameter and number of turns. After coiling the spring, keep the annealing temperature at 410°C in the tempering furnace for stress relief annealing, the holding time is 60 minutes, and the residual stress on the surface of the spring is less than 150Mpa. After annealing, grind the two ends of the spring, the grinding angle is 270~330 degrees, and the remaining thickness of the end is greater than 0.15d (d is the diameter of the steel wire). The center of the bow-shaped spring is bent to form a bow-shaped spring. The angle b...

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Abstract

The invention relates to a process for making a spring and in particular relates to a process for processing an arc-shaped spring, which comprises the following steps: winding into a spring, annealing, grinding and thermoforming to obtain an arc. The process is simple, comprises the steps of bending the rectilinear cylinder springs into the arc shape directly and thermoforming. The formed arc-shaped springs have good consistency and stable quality. The arc-shaped springs are formed by thermoforming the rectilinear cylinder springs in one time and have the free angle of more than 45 degrees. The process solves the technical problems in the prior art that the arc-shaped springs with large angles have low yield and low production efficiency and the consistency of the formed springs is not ideal.

Description

technical field [0001] The invention relates to a manufacturing process of a spring, in particular to a processing technology of a large arc arc spring. Background technique [0002] As a widely used elastic element, springs are mostly cylindrical in shape. The production and processing can be divided into cold coil forming and hot coil forming. The main processing steps of cold coil forming are coil spring→stress relief annealing→end surface grinding→ (Chamfering)→Shot blasting→Standing treatment→Surface treatment→Packaging, etc. [0003] In order to better match its assembly space, the spring is also designed to be non-cylindrical, such as the spring used for the dual-mass flywheel of an automobile. The processing technology of this spring is not exactly the same as that of the cylindrical spring. [0004] For example, the Chinese patent No. CN101092014A was announced on December 26, 2007, and the name is a manufacturing process and special equipment for an arc spring us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21F35/00
Inventor 邵承玉
Owner HANGZHOU FUCHUN SPRING
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