Repairing method for mechanical machine-lathed compression spring

A compression spring and machining technology, which is applied in the repairing field of machined car-made rectangular section compression springs, can solve the problems of easy generation of waste, low production qualification rate and high processing cost, and achieve the effect of improving the manufacturing qualification rate.

Inactive Publication Date: 2006-11-29
CHANGAN AUTOMOBILE (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the production pass rate of mechanically processed rectangular (or trapezoidal) cross-section compression springs is not high, and this kind of manufacturing and processing costs are r

Method used

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  • Repairing method for mechanical machine-lathed compression spring
  • Repairing method for mechanical machine-lathed compression spring
  • Repairing method for mechanical machine-lathed compression spring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Below to choose 65Si 2 Taking the MnWA material as an example, the repair method of the compression spring made by machining is explained.

[0016] The rotation direction of the spring in this embodiment is right-handed, the effective number of turns n=13, and the total number of turns n 1 =14.5, the outer diameter of the spring is Φ33.6h12, the inner diameter is Φ13.6H12, the inner and outer round chamfers of the spring are both 1×45°, the free length

[0017] H 0 = 150 - 2 + 1.5 , stiffness η = p 2 - p 1 H 1 - H 2 ...

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Abstract

The invention discloses a mending method for mechanism processing compression spring that includes the following steps: taking spring backfire and controlling the rigidity at HRC44-HRC48; strutting every pitch of the spring; taking heating process of to the spring and ensuring the rigidity between HRC50-HRC53 after heating process; snapping 24hours and finishing mending. The invention could improve mechanism processing compression spring yield and sharply decrease produce cost.

Description

Technical field: [0001] The patent of the present invention relates to a repairing method of a spring, in particular to a repairing method of a rectangular (or trapezoidal) cross-section compression spring made by mechanical processing. Background technique: [0002] In mechanical processing, it is often necessary to process and produce equal-pitch compression springs. This kind of spring requires high elastic force, high quality requirements, and narrow hardness control range after heat treatment and quenching. Therefore, it is a spring product with very strict performance requirements. At present, there are two methods of processing and producing equal-pitch compression springs: one is winding, which is divided into hot winding and cold winding of raw materials in annealed state; the other is machining springs, That is, a piece of equal-pitch compression spring with a rectangular spring section is completely mechanically processed on a circular bar. The manufacturing proce...

Claims

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Application Information

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IPC IPC(8): C21D9/02C21D1/18C21D11/00
Inventor 付在再
Owner CHANGAN AUTOMOBILE (GRP) CO LTD
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