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

A manufacturing method and technology of two-way screw, which is 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 procedure

Inactive Publication Date: 2012-10-03
CHONGQING WANGJIANG IND
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  • Abstract
  • Description
  • 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 drawings and embodiments.

[0021] The method for manufacturing a two-way screw sleeve type tension spring according to the present invention has the following steps:

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

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

[0024] The third step is to insert screw sleeves: insert screw sleeves 2 on both ends of the cylindrical coil spring 1, first install the screw sleeve 2 made by a car in one end of the cylindrical coil spring 1, and spin it on the spinning fixture , Tighten one end of the cylindrical coil spring 1 so that one end of the cylindrical coil spring fits the tapered surface of the screw sleeve: Then, install the screw sleeve 2...

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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 thetwo-way threaded-insert type tension spring is reliable in use.

Description

Technical field [0001] The invention relates to a screw sleeve type spring and a manufacturing method thereof, in particular to a method for manufacturing a two-way screw sleeve type tension spring. Background technique [0002] Because it is very difficult to connect a closely wound cylindrical spiral spring with two threaded sleeves, the connection technology used in the past was to first closely wind the annealed 60Si2MnA steel wire into a cylindrical spiral spring, and then insert and connect the two ends to a threaded sleeve. , And then quenching and tempering to achieve material strength. This method requires high process control, complex operation process and long process, easy decarburization during spring quenching, and difficult surface treatment of the workpiece after quenching. The most important thing is that this type of extension spring requires a relatively large initial tensile stress (about 700N), and the two-way screw sleeve type extension spring produced by t...

Claims

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Application Information

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Patent Type & Authority Patents(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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