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Method for manufacturing two-way threaded-insert type tension spring

A manufacturing method and technology of two-way screw, applied in the field of coiled spring and its manufacturing, can solve the problems of long process, product scrapping, high process control, etc., and achieve the effect of solving the problem of initial tension, solving the difficulty of forming, and simplifying the process program

Inactive Publication Date: 2010-10-27
CHONGQING WANGJIANG IND
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method has high requirements on process control, complex operation process and long process, easy decarburization of spring during quenching, and difficult surface treatment of workpiece after quenching
The most critical thing is that this type of extension spring requires a relatively large initial tensile stress (about 700N), while the initial tensile stress of the two-way screw-type extension spring produced by this process method is almost zero, resulting in the scrapping of products in batches. Moreover, the formed two-way helical tension spring has faster stress relaxation when it is working, etc.

Method used

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  • Method for manufacturing two-way threaded-insert type tension spring
  • Method for manufacturing two-way threaded-insert type tension spring
  • Method for manufacturing two-way threaded-insert type tension spring

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The manufacture method of a kind of two-way screw type extension spring of the present invention, its steps are as follows:

[0022] The first step is to select spring steel wire: the selected material grade is 60Si2MnA, and the strength level is 1620-1770Mpa;

[0023] The second step is to wind the cylindrical helical spring: the selected spring steel wire is tightly wound on the spring coiling machine to make the cylindrical helical spring 1, see figure 1 ;

[0024] The third step is to inlay the screw sleeve: inlay the screw sleeve 2 at both ends of the cylindrical coil spring 1 respectively, first install the screw sleeve 2 made of a car into one end of the cylindrical coil spring 1, and perform spinning on the spinning fixture , tighten one end of the cylindrical helical spring 1, so that one end of the cylindrical helical spring fits the ...

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Abstract

The invention discloses a method for manufacturing a two-way threaded-insert type tension spring. The method comprises the following steps of: selecting a spring steel wire; winding the spring steel wire to make a cylindrical spiral spring; embedding a threaded insert into the cylindrical spiral spring; performing sizing and tempering treatment; detecting the load of the obtained product on a spring tester according to the quality requirements of the product; immersing the two-way threaded-insert type tension spring which is tested and qualified into oil; and packaging the two-way threaded-insert type tension spring. The qualification rate of the two-way threaded-insert type tension spring produced by the method reaches 100 percent; compared with the traditional process, the method has the advantages that: the process procedures are simplified, the produced two-way threaded-insert type tension spring avoids quenching and surface treatment and the like, and the cost is reduced; and the two-way threaded-insert type tension spring is reliable in use.

Description

technical field [0001] The invention relates to a spiral sleeve type spring and a manufacturing method thereof, in particular to a manufacturing method of a two-way spiral sleeve type extension spring. Background technique [0002] Because it is very difficult to connect the tightly wound cylindrical helical spring with two screw sleeves, the connection technology used in the past is to first tightly wind the annealed 60Si2MnA steel wire into a cylindrical helical spring, and then carry out mosaic connection with a screw sleeve at both ends, and then , and then quenched and tempered to achieve material strength. This method has high requirements on process control, complex operation process and long process, easy decarburization of spring during quenching, and difficult surface treatment of workpiece after quenching. The most critical thing is that this type of extension spring requires a relatively large initial tensile stress (about 700N), while the initial tensile stress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F3/02
Inventor 孙源力胡国发邢雪芳舒跃文
Owner CHONGQING WANGJIANG IND
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