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Short-pressure enhancing treatment of sweeping buffer spring

A technology for strengthening treatment and buffering springs, applied in the field of spring manufacturing, can solve problems such as inability to process springs, unable to produce qualified parts, etc., to achieve the effect of ensuring output characteristics, short production cycle, and improving bearing capacity

Inactive Publication Date: 2005-12-28
CHANGAN AUTOMOBILE (GRP) CO LTD
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the existing spring manufacturing process, and propose a short-pressure strengthening treatment method for vehicle-made buffer springs, which replaces the traditional strong-pressing and standing treatment process, and carries out the processing of vehicle-made buffer springs with large loads and large helix angles. Mechanical strengthening treatment solves the problem that the traditional processing methods of spring manufacturing cannot be processed and cannot produce qualified parts, which can make the spring fully plastically deformed to ensure its geometric size and output characteristics, and improve the bearing capacity and fatigue life of this type of spring

Method used

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  • Short-pressure enhancing treatment of sweeping buffer spring
  • Short-pressure enhancing treatment of sweeping buffer spring
  • Short-pressure enhancing treatment of sweeping buffer spring

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Embodiment Construction

[0020] Take the production of a buffer spring as an example to describe the method in detail below:

[0021] The structural parameters of the spring are shown in figure 1 , the pitch of the spring is 29mm, and the section thickness is 23.8 0 +1.5 mm, outer diameter 47 -0.25 +0.2 mm, inner diameter 18 -0.2 +0.6 mm, the finished product length H 0 for 276 -2 +1.5 mm, height H of working start state 1 262mm, pressure P 1 26KN, height H at the end of work 2 238.5mm, pressure P 2 73±2KN, spring pressure and height H j : 217mm; corresponding pressure P j 156KN

[0022] First, the first compression height of the spring should be calculated according to the prefabricated height HI of the spring, and the next compression amount of the spring should be determined according to each compression situation, and the compression amount and the corresponding pressure P′ and height H′ should be calculated, see Table 1 :

[0023] Table 1: List of buffer spring short pressure tes...

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Abstract

A short pressure reinforcing process of struck buffer elastic spring. The process adopts repeating the way of short pressure reinforcing process when mechanic reinforcing. The elastic spring can be completely plastometric set so that it reaches content force output property and increases endurance life. The process is used for parts with big lead angle and high load which cannot be processed by short pressure and halt.

Description

technical field [0001] The invention belongs to the technical field of spring manufacturing, and in particular relates to a spring mechanical strengthening treatment process, which is used for mechanical strengthening treatment of a car-made cylindrical helical spring that bears a large load and has a large helix angle. technical background [0002] From the perspective of spring design theory and manufacturing experience, if the residual stress in the spring material is opposite to the working stress, the load-bearing capacity of the spring can be improved. In the spring manufacturing process, a mechanical strengthening process should be used to make the surface of the spring material produce favorable forces. Residual stress, standing treatment or strong pressure treatment are the strengthening processes currently used in spring manufacturing. Standing treatment is to compress the spring to the working limit height or to the tight height several times, usually 3 to 5 times...

Claims

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Application Information

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IPC IPC(8): C21D7/02
Inventor 罗顺玲漆莉虹程刚向宏
Owner CHANGAN AUTOMOBILE (GRP) CO LTD
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