Torsion fatigue test method for spring steel wire and device

A technology for torsional fatigue and spring steel wire, applied in the field of spring steel wire torsional fatigue test method and device, can solve the problems of high test cost, major equipment accident, long test cycle, etc., to avoid mechanical wear, eliminate mechanical gap, improve Effects of security and stability
CN107436263AActive Publication Date: 2017-12-05中机生产力促进中心有限公司
8 Cites 32 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
中机生产力促进中心有限公司
Publication Date
2017-12-05

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a torsion fatigue test method for a spring steel wire and a device thereof. By setting of a steel wire test piece, a spring tension-compression fatigue test is equivalent to a torsion fatigue test of the spring steel wire with same parameters. According to the test method, the steel wire test piece is same in size with the steel wire for preparation of a spring product, compared with a material-based rotating bending fatigue test method, the torsion fatigue test method can meet requirements of dimensional factors in the fatigue test, correction factors can be reduced, more reliable results can be obtained, compared with a product-based tension-compression fatigue test method, the torsion fatigue test method has significant advantages in high-stress and large-amplitude test requirements. The test device can meet high frequency long period requirements in the process of the torsion fatigue test method by setting of a spring clamper for clamping and a part rolling bearing and a round head flat key, the test device is safe and reliable in the operation process of the test, a direct-drive servo drive system is used as a transmission mode, and safety and stability of long-period work of the test device can be enhanced.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of spring fatigue tests, in particular to a spring steel wire torsional fatigue test method and a device thereof. Background technique

[0002] The spring industry is a very important basic industry in the national industrial economy. In industries such as automobiles, electrical appliances and electronics, railways, aerospace, and energy, springs are indispensable and key basic components.

[0003] Under actual working conditions, most springs work under alternating loads, and their working stress is lower than the yield strength of the material. The spring works under alternating load, and the phenomenon of failure after long-term operation is fatigue damage. According to statistics, more than 80% of spring failures are caused by fatigue, most of which are sudden fractures. With the development of modern machinery in the direction of high speed and large size, spring products operate under harsh working...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More