Thin sheets pre-tighten positioning clamping device

A positioning clamping and thin plate technology, which is applied in automobile manufacturing and mechanical fields, can solve the problem that the thin plate sample cannot limit the rotation of the sample, and achieve the effect of simple structure, accurate positioning and easy operation

Inactive Publication Date: 2008-01-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are fixtures at home and abroad that drive the curved chuck to clamp other samples through bolts, but for thin plate samples, the rotation of the sample in the plane of the plate cannot be restricted (that is, positioned along the width direction and the loading direction), and there are still There is no special fixture for positioning and clamping of spot welded tensile shear specimens along the width direction or loading direction

Method used

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  • Thin sheets pre-tighten positioning clamping device
  • Thin sheets pre-tighten positioning clamping device

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Experimental program
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Embodiment Construction

[0019] Embodiments of the present invention will be specifically described below with reference to FIGS. 1 to 3 .

[0020] As shown in FIG. 1 , this embodiment mainly includes a base 1 , a clamping block 2 , an "L"-shaped positioning block 3 , a pre-tightening slider 4 , fastening bolts 5 and fastening nuts 6 . Wherein, the upper surface of the base 1 is provided with a fixed chuck a integrated with the base 1, and a pre-tightening slider 4 is arranged on the right side of the fixed chuck a, and the pre-tightening screw 10 is arranged in a direction from right to left. The direction passes through the pre-tightening slider 4 and the fixed chuck a in turn and enables the pre-tightening slider 4 to slide left and right along the outer surface of the pre-tightening screw 10, and the pre-tightening screw 10 can pass through the nut 14 arranged at the left end of the pre-tightening screw 10 Make the left end surface of the pre-tightening slider 4 contact with the right end surface ...

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Abstract

The invention provides a sheet preload positioning and clamping device which pertains to the field of the machinery and automobile manufacture technology. The device consists substantially of a substrate (1), a clamping block (2), a positioning block (3), a preload slider (4), a fastening bolt (5), a fastening nut (6), a preload spring (9) and a preload screw (10). The positioning block (3) is a two-point positioning structure and arranged on the substrate (1). Under the force of the preload spring (9), the preload screw (10) drives the preload slider (4) to ensure a test piece to be positioned on the substrate (1). Under the force of the fastening nut (6), the fastening bolt (5) drives the clamping block (2) to clamp the test piece. The lower end of the substrate (1) is provided with a boss holding end, which can be clamped on the testing machine conveniently. No fixture needs to be dismounted throughout the test processes. The invention can ensure a spot welding test piece to maintain the same clamping position during a plurality of times of clamping and realize the clamping of the test piece.

Description

technical field [0001] The invention relates to a thin plate pre-tightening positioning and clamping device, which is used for positioning and clamping a spot welding fatigue sample in a unidirectional tension-shear fatigue loading test. It belongs to the technical field of machinery and automobile manufacturing. technical background [0002] Resistance spot welding has the advantages of low cost, high efficiency, and simple operation. It is very suitable for mass production and has been widely used in modern industry, especially in the automobile industry. As modern automobiles are increasingly developing towards high strength and high reliability, light weight, and fuel saving, thinner high-strength steel plates are increasingly used, and the stiffness of spot welded joints decreases due to thinner plates, making Its fatigue strength is weakened. Therefore, technicians should regard the fatigue performance of solder joints as an important parameter of automobile safety a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/00
Inventor 尚德广李承山王瑞杰孙国芹李学朋
Owner BEIJING UNIV OF TECH
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