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Clamp for threaded fastener proof load tests

A technology for threaded fasteners and guaranteed load, applied in the field of threaded fastener testing devices, can solve problems such as large error in test values, and achieve the effects of prolonging service life, preventing corrosion and accurate test values.

Inactive Publication Date: 2014-01-15
CHENGDU GAOYUAN AUTOMOBILE IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional threaded fastener proof load test fixture has the disadvantage that when the big end of the bolt and the opposite end surface of the nut threaded with the bolt are not perpendicular to the axis of the bolt, the test value error of the thread proof load test is relatively large; therefore, the design of a A threaded fastener proof load test fixture with less test value error in the thread proof load test has become an urgent problem to be solved

Method used

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  • Clamp for threaded fastener proof load tests
  • Clamp for threaded fastener proof load tests

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] as attached figure 1 , attached figure 2 Shown: a proof load test fixture for threaded fasteners, including two symmetrically arranged chucks 3, several standard bolts 1 of different specifications, and several standard nuts corresponding to several standard bolts 1 one by one (in the figure not shown); the chuck 3 includes a chuck body 31, a flat pad 32 with a through hole 321, a follower pad 33 with a middle hole 331 whose aperture is smaller than the aperture of the through hole 321, and several sleeves with one end Adjusting washer 34 with retaining ring 341; the inner diameters of several adjusting washers 34 correspond to several standard bolts 1 one by one; the outer diameter of one adjusting washer 34 is in transition fit with the inner diameter of another adjusting washer 34 sleeved outside; the outermost The outer diameter of an adjusting washer 34 ...

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Abstract

The invention relates to the field of threaded fastener test apparatus, and especially relates to a clamp for threaded fastener proof load tests. The clamp for threaded fastener proof load tests comprises two symmetrically arranged clamp heads; each clamp head comprises a clamp body, a horizontal cushion block provided with a through hole, and a servo-actuated cushion block, which is provided with a middle hole, wherein the hole size of the middle hole is smaller than that of the through hole; one end of the servo-actuated cushion block is provided with a semi-spherical surface; one end of the horizontal cushion block is provided with a spherical-crown shaped recess, which matches with the semi-spherical surface; the clamp body comprises a clamping seat, wherein the bottom surface of the clamping seat is a plane and one side of the clamping seat is provided with a middle cavity, and the middle cavity is in a hole-through connection with the side wall of the clamping seat, and a clamping rod which is connected to the top surface of the clamping seat; the bottom of the clamping seat is provided with a bolt groove which is respectively in a hole-through connection with the side wall of the clamping seat and the middle cavity. The clamp for threaded fastener proof load tests guarantees the precision of the results of thread fastener proof load tests.

Description

technical field [0001] The invention relates to the field of testing devices for threaded fasteners, in particular to a proof load test fixture for threaded fasteners. Background technique [0002] The proof load of threaded fasteners is an important indicator for testing the mechanical properties of threaded fasteners. According to the national standards GB / T 3098.4-2000 and GB / T3098.2-2000, the proof load of threaded fasteners should be tested by tension The utility model of Chinese patent application No. CN201120273613.4 discloses a set fixture for multifunctional threaded fastener test, including main fixture, spacer, nut auxiliary fixture, and bolt auxiliary fixture. The cooperation between the block and different auxiliary fixtures can realize the mechanical performance tensile test and proof load test of bolts, nuts and studs with different specifications and types. The traditional threaded fastener proof load test fixture has the disadvantage that when the big end o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01M13/00
Inventor 姜君红侯海靖
Owner CHENGDU GAOYUAN AUTOMOBILE IND
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