Clamping device for high-temperature tensile sample for metal sheet and use method of clamping device

A technology for clamping devices and tensile samples, applied to measuring devices, using stable tension/pressure to test material strength, instruments, etc., can solve problems such as complex structure, cumbersome operation, and affecting test efficiency, and achieve device structure Small size, good coaxiality, and easy-to-use effects

Active Publication Date: 2018-11-27
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing clamping methods that can meet the test requirements generally have problems su

Method used

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  • Clamping device for high-temperature tensile sample for metal sheet and use method of clamping device
  • Clamping device for high-temperature tensile sample for metal sheet and use method of clamping device
  • Clamping device for high-temperature tensile sample for metal sheet and use method of clamping device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] As shown in the figure, a clamping device for a high-temperature tensile test specimen of a thin metal plate. Both ends of the test specimen 6 are provided with fixing parts, and each fixing part is provided with a pin hole. The clamping device passes A pin hole is used to clamp and fix the sample 6. The clamping device includes a clamp body 1 and a clamping portion 2 connected to the clamp body 1. One end of the clamp body 1 is provided with a threaded hole 101. The threaded hole A connecting rod is installed in 101. One end of the connecting rod away from the threaded hole 101 is connected to the tensile test equipment. The other end of the clamp body 1 is provided with a clamping portion 2 integrally provided with the clamp body. An end of the clamping portion 2 away from the threaded hole 101 is provided with a groove 201 with an isosceles trapezoid in cross section, and the groove 201 extends along the end of the clamping portion 2 to one side of th...

Example Embodiment

[0058] Example 2

[0059] According to the clamping device and its method of use in Example 1, the material of the metal sheet is selected as Ti70, the thickness of the metal sheet is δ=1.5mm, the test temperature of the high-temperature furnace is 600 ℃, and the high-temperature tensile test is performed. Stress-strain curve see Figure 7 .

Example Embodiment

[0060] Example 3

[0061] According to the clamping device and its method of use in Example 1, the material of the thin metal plate is Ti31, the thickness of the thin metal plate is δ=0.7mm, the test temperature of the high-temperature furnace is 350℃, and the high-temperature tensile test is performed. Stress-strain curve see Figure 8 .

[0062] From Example 2 and Example 3, it can be seen that the clamping device and the method of use of the present invention are used for high temperature tensile test, and the wedge gasket Ⅰ3 and wedge gasket Ⅱ4 can be used to complete the high temperature of metal sheets with multiple specifications. After the tensile test, there was no obvious deformation at the fixed end of the sample, and the elastic section of the obtained stress-strain curve was linear, indicating that the clamping device and the method of use of the invention have good versatility and usability , Can be promoted.

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Abstract

The invention provides a clamping device for a high-temperature tensile sample for a metal sheet. The clamping device comprises a clamp body and a clamping part connected to the clamp body, wherein agroove is formed in one end, far from a threaded hole, of the clamping part; and a wedge-shaped gasket I, an annular gasket I, a sample, an annular gasket II and a wedge-shaped gasket II are sequentially arranged in the groove, a guiding slot I which extends downwards and has a U-shaped longitudinal section is formed in the top end of the wedge-shaped gasket I, a fixed block I is arranged at the bottom end of the wedge-shaped gasket I, a guiding slot II which extends downwards and has a U-shaped longitudinal section is formed in the top end of the wedge-shaped gasket II, a fixed block II is arranged at the bottom end of the wedge-shaped gasket II, and a fixed pin sequentially penetrates through the through hole I, the annular gasket I, a sample, the annular gasket II and a through hole IIso as to fix the sample to the clamping part. The clamping device has the characteristics of small size, simplicity and convenience in operation and the like, and the centering and fixation of the sample can be easily finished, so that the purposes of shortening the test preparation period and improving the test efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of testing the mechanical properties of metal materials, in particular to a clamping device for a high-temperature tensile sample of a thin metal plate and a method for using the same. Background technique [0002] When conducting high-temperature tensile tests on metal sheets in the laboratory, pins are usually used to connect dumbbell-shaped plate samples with pin holes processed at the clamping end to U-shaped high-temperature tensile fixtures, and separate the two sides of the pin holes. Add gaskets of appropriate thickness to limit lateral deformation on both sides of the pin hole to meet the requirements of the test standard. However, in actual operation, since the gasket and the sample must be put into the U-shaped fixture, the total thickness of the gasket and the clamping end of the sample must be less than the distance between the two side walls of the U-shaped fixture, and the two sides of the sam...

Claims

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Application Information

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IPC IPC(8): G01N3/04G01N3/18
CPCG01N3/04G01N3/18G01N2203/0017G01N2203/0226G01N2203/0282G01N2203/04
Inventor 张先锋杜卓同
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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