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Pulling and bending multi-axis loading fatigue testing machine

A fatigue testing machine and shaft loading technology, applied in the field of fatigue testing machines, can solve problems such as low efficiency, inability to obtain real data, and poor precision, and achieve the effect of simple mechanical structure, low power, and easy operation

Inactive Publication Date: 2014-07-02
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the fatigue performance test under multi-axial loading, the tensile, bending, and torsional fatigue strength of the material are measured separately, and then the fatigue life under multi-axial loading is estimated by using the equal strength theory. This test method is not only accurate Poor, inefficient and unable to obtain real data under actual working conditions

Method used

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  • Pulling and bending multi-axis loading fatigue testing machine
  • Pulling and bending multi-axis loading fatigue testing machine
  • Pulling and bending multi-axis loading fatigue testing machine

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Embodiment Construction

[0013] exist figure 1 and figure 2 In the tension-bending-torsion multiaxial loading fatigue testing machine shown, a cavity through which both ends are fixed in the support seat fixed on the frame, and a hollow tensile shaft is arranged in the cavity of the support, and the two Connected by splines. One end of the hollow stretching shaft is provided with a ring-shaped blocking plate, and the central screw hole of the blocking plate is engaged with the screw. The screw is set in the hollow stretching shaft and coaxial with it. One end of the screw is connected to The stepping motor A is connected, and the other end of the hollow stretching shaft is connected with the side of the chuck A that does not have a jaw, and the other side of the chuck A is equipped with a jaw, which clamps one end of the specimen. A limit sensor is set between the tensile support seat and the chuck A. The other end of the specimen is clamped on the jaws of chuck B. The jaws of the chuck B are opp...

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Abstract

The invention provides a pulling and bending multi-axis loading fatigue testing machine. The pulling and bending multi-axis loading fatigue testing machine is mainly characterized in that a stepping motor arranged on a rack is connected with one side of a chuck A by a screw rod and a hollow stretching shaft and can be used for testing a stretching fatigue of a test piece; a stepping motor B is connected with an eccentric shaft; the eccentric shaft is provided with an eccentric wheel, a bent connection rod and a bent force applying mechanism and can be used for detecting the bending fatigue of the test piece; the eccentric shaft is further provided with an eccentric wheel and a torsion connection rod and is connected with a hollow torsion shaft by a connection rod, a transition connection rod and a torsion rocker; the hollow torsion shaft is connected with the chuck B and can be used for detecting the torsion fatigue of the test piece. The pulling and bending multi-axis loading fatigue testing machine has the advantages of simple mechanical structure, easiness for operation, small power of the stepping motors and the like, and can be used for finishing tests of the fatigue performances of test piece materials from single stretching, bending and torsion to multi-shaft difficult combination loading conditions.

Description

technical field [0001] The invention relates to a testing device for mechanical processing, in particular to a fatigue testing machine. Background technique [0002] Fatigue performance is an important parameter to evaluate material performance. Fatigue testing machine is an important instrument and equipment for testing the fatigue performance of materials, parts and structures. It is one of the most commonly used equipment for material performance testing in the material industry and quality supervision departments at all levels. Its application fields involve machinery, metallurgy, aerospace, construction And other industries. Existing fatigue testing machines mainly include tension and compression fatigue testing machines, torsional fatigue testing machines, rotating bending fatigue testing machines, plane bending fatigue testing machines and the like. At present, for the fatigue performance test under multi-axial loading, the tensile, bending, and torsional fatigue st...

Claims

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Application Information

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IPC IPC(8): G01N3/26G01N3/32
Inventor 郑丽娟霍立军李燕郁冠英付宇明
Owner YANSHAN UNIV
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