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Spring manufacturing process

A manufacturing process and coil spring technology, which is applied in the field of manufacturing process with small thermal attenuation rate, can solve the problems of high spring thermal attenuation rate, low spring thermal attenuation rate, and short service life, so as to reduce thermal relaxation and deformation, reduce thermal The effect of attenuation

Active Publication Date: 2012-10-03
HANGZHOU FUCHUN SPRING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a spring manufacturing process with long service life under high stress and low spring thermal attenuation rate; it solves the technology of short service life of spring under high stress and high spring thermal attenuation rate existing in the prior art question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The manufacturing process of the spring includes the following processes:

[0025] The first step is to coil the spring. The steel wire is coiled according to the direction of rotation, prefabricated height, outer diameter and number of turns, and the two ends of the spring are tightened together to complete the preliminary spring shape;

[0026] The second step, tempering, put the spring into the tempering furnace for stress relief tempering;

[0027] The third step is end grinding, grinding the two ends of the spring flat, and the grinding angle is greater than 300 degrees;

[0028] The fourth step, shot blasting, three shot blasting, the diameter of the first shot blasting is larger than the diameter of the second shot blasting, the diameter of the second shot blasting is larger than the diameter of the third shot blasting, the first shot blasting The frequency is higher than the frequency of the second and third shot blasting, the three shot blasting times are the ...

Embodiment 2

[0035] If it is necessary to make a spring with a length of 68mm and an outer diameter of 13.5mm, using the manufacturing process of the spring of the present invention, the spring is first rolled, the steel wire is wound and the two ends of the spring are tightened, and the spring parameter after winding is 13.6 ±0.1mm, the prefabricated height is 79±0.5mm, and the total number of turns is 17.8; then, carry out stress-relief tempering on the coiled spring in a tempering furnace with a tempering temperature of 410±10°C, and the tempering holding time is 60 ±3 minutes; After the tempering treatment is completed, the end faces of the springs are ground, and the two ends are ground flat, and the angle of the grinding surface is greater than 300 degrees; after the grinding, the shot blasting treatment is carried out, and the shot blasting treatment includes 3 shots. A steel shot with a diameter of 0.6mm is shot blasted in a shot blasting machine with a frequency of 60HZ for 30 minu...

Embodiment 3

[0037]The production process of the spring, the first step is to inspect the raw materials, check the diameter of the steel wire, the tensile strength of the material, the surface quality, etc., to ensure the normal work of the spring in the hot oil environment; the second step is to carry out the first sample , according to the online equipment, complete all production process processing, determine whether the final product meets the requirements of the drawing, and fine-tune the production process parameters; the third step is to coil the spring according to the spring parameters such as the outer diameter of the spring, the prefabricated height, and the total number of turns. And tighten the two ends of the spring; the fourth step is to carry out stress relief tempering in the tempering furnace, the tempering temperature is kept at 400 degrees, and the temperature is kept for 60 minutes; the fifth step is to grind the two ends of the spring, and the grinding surface angle Gr...

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Abstract

The invention relates to a spring manufacturing process. The spring manufacturing process comprises the following steps of: reeling a spring, namely reeling a steel wire according to a rotating direction, a preset height, an outer diameter and the number of turns, and tightly compressing the two ends of the spring; tempering, namely putting the spring into a tempering furnace for stress relief tempering; grinding end surfaces, namely grinding the two end surfaces of the spring flatly, wherein the grinding angle is more than 300 degrees; performing shot-blasting for three times, wherein a first-time shot-blasting diameter is greater than a second-time shot-blasting diameter, and the second-time shot-blasting diameter is greater than a third-time shot-blasting diameter; performing creep deformation tempering, compressing the spring to ensure that a positioning length is reached, fixing on a fixture, putting the fixture with the spring into the tempering furnace, preserving the heat, and performing water cooling immediately to reach room temperature after a discharging process; washing; demagnetizing; and performing rust-proof treatment. By the spring manufacturing process, the spring has long service life and is low in thermal attenuation ratio under high stress; and the technical problems of short service life and high thermal attenuation ratios of springs under the high stress existing in the prior art are solved.

Description

technical field [0001] The invention relates to a manufacturing process of a spring, in particular to a manufacturing process requiring the spring to have a small thermal attenuation rate. Background technique [0002] Springs are very common in current applications, and all walks of life use springs with different strengths, stiffnesses and service life according to different purposes. Therefore, the manufacturing process of the spring is also different. The current public documents include: "Manufacturing process of high-stress valve spring (CN101439458A)" includes the following processes: spring coiling, rolling steel wire blanks into semi-finished springs; first tempering, tempering the springs at low temperature Stress; spring grinding, grinding the two end faces of the spring to achieve the required length; chamfering, removing the burr of the spring after grinding; stress optimization; second tempering, tempering the spring again at low temperature to relieve stress ...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 邵文武沈有忠
Owner HANGZHOU FUCHUN SPRING
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