Bolt fixture structure for mechanical properties of bolts and testing device

A test device, a technology of mechanical properties, applied in the measurement device, the use of a stable tension/pressure test material strength, strength properties and other directions, can solve problems such as bolt sliding wire damage, achieve high accuracy, wide versatility, good The effect of economic benefits and scientific research value

Active Publication Date: 2013-02-13
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual engineering, there ar...

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  • Bolt fixture structure for mechanical properties of bolts and testing device
  • Bolt fixture structure for mechanical properties of bolts and testing device
  • Bolt fixture structure for mechanical properties of bolts and testing device

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Embodiment Construction

[0022] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] Such as figure 1 , figure 2 and image 3 As shown, the test device of the present invention includes a bolt fixture structure, a screw rod elongation test device, and a screw rod and nut relative slip test device. The bolt fixture structure includes a bottom plate 1 with a central hole in the center, a top plate 4, four uprights 3, twelve nuts 2, a tie rod 6, four stiffeners 5 and a series of spacers 8. The bottom plate 1 and the top plate 4 are fixed in parallel by four uprights 3, and the pull rod 6 for connecting with the chuck of the testing machine is vertically fixed on the top plate 4. The top plate 4 and the pull rod 6 are connected by a weld through the stiffener plate 5, and the columns 3 are distributed at the four corners of the bottom plate 1 and the top plate 4, and each corner is fixed by three nuts 2 inside and outside. Accord...

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Abstract

The invention discloses a testing device for mechanical properties of bolts. The testing device comprises a screw rod elongation testing device, a bolt fixture structure and a relative slippage testing device, wherein the relative slippage testing device comprises a displacement extractor, a clip type extensometer and a data collecting device; one end of the displacement extractor is fixed at the end part of a tested screw rod; one end of the clip type extensometer is fixed on the side surface of a tested screw cap; the other end of the clip type extensometer is fixed in a corresponding position of the displacement extractor; and the data collecting device is connected with the clip type extensometer and used for collecting sliding displacement data. According to the invention, the phenomenon that whether bolts with different specifications come into being slip or not before the screw rods are not snapped can be qualitatively checked; the slip bolts can be also quantitatively studied; slipping constitutive models between the screw rods and the screw caps are quantitatively studied; and tensile constitutive models of the screw rods can be also studied. The testing device for the mechanical properties of the bolts, disclosed by the invention, has the advantages of more comprehensive researches on tensile mechanical properties of the bolts, wide generality, high accuracy, good economic benefits and good scientific research values.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a device for studying the mechanical properties of bolts. Background technique [0002] Compared with other material structures, steel structures have many advantages such as high strength, light weight, high degree of industrialization, and short construction period. Wide range of applications. Because the bolt connection is convenient for assembly and disassembly, it is convenient for maintenance, it can increase the pre-tightening force to prevent loosening, and it will not cause the phase change of the joint material, so the bolt connection is widely used in steel structures, and even appears in other structures. In, for example, the segment connection of the shield tunnel. [0003] Since bolts play a very important role in the structure, bolt design is also the main point of structural design. At present, the design of the bolt mainly includes the self-locking desi...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/04
Inventor 柳献张姣龙唐敏张浩立陆仁超刘书
Owner TONGJI UNIV
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