Two-dimensional pre-stressing applying device and working method thereof

A technology of applying device and pre-stress, applied in the direction of measuring device, measuring force, instrument, etc., to solve the calibration problem and solve the effect of residual stress accuracy

Active Publication Date: 2019-08-06
江苏普埃图机电科技有限公司
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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a two-dimensional prestressing device and its working method to solve the calibration problem of measuring the residual stress accuracy of thin plate parts by the through hole method

Method used

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  • Two-dimensional pre-stressing applying device and working method thereof
  • Two-dimensional pre-stressing applying device and working method thereof
  • Two-dimensional pre-stressing applying device and working method thereof

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 Shown is a two-dimensional prestressing device, including a workbench 1, two linear sliding modules 2 vertically intersecting on the workbench 1, and a cross sample 8;

[0023] Wherein, the linear sliding module 2 includes a linear guide rail, two guide rail sliders adapted to the linear guide rail, and a connecting base plate 4 installed on the two guide rail sliders, and the two guide rail sliders are symmetrically distributed on the connecting base plate 4; the connecting bottom plates 4 on the two linear sliding modules 2 are vertically staggered up and down through the pads 3, and slide along their respective linear guide rails independently of each other; the two ends of the connecting bottom plates 4 are respectively installed with The electric platform 6 and the fixed platform 5 are respectively provided with sample clam...

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Abstract

The invention discloses a two-dimensional pre-stressing applying device and a working method thereof. The two-dimensional pre-stressing applying device comprises two linear sliding modules arranged ona work bench vertically and crosswise. Each linear sliding module includes a linear guide rail, two guide rail sliding blocks matching the linear guide rail, and a connecting bottom plate installed on the two guide rail sliding blocks; and an electric platform and a fixed platform are installed at the two ends of the connecting bottom plate respectively. Fixation of two opposite ends of a cross-shaped test sample is realized by using test sample fixtures arranged on the electric platform and the fixed platform; the electric platform pulls one end of the test sample to generate a tensile load;and the two-dimensional stress state of the test sample is monitored in real time by a strain rosette arranged at the center of the test sample to obtain a calibration test sample with the known two-dimensional stress. Therefore, the two-dimensional tensile load can be applied to the test sample rapidly and conveniently. The two-dimensional pre-stressing applying device and the working method thereof are suitable for calibration of samples with different sizes; and motions in two directions are independent of each other to form a mechanical two-dimensional motion decoupling assembly, so thata calibration problem of the measurement precision of the thin plate part residual stress based on a through hole method is solved.

Description

technical field [0001] The invention relates to a two-dimensional prestress applying device and a working method thereof, which are used for calibrating the accuracy of measuring residual stress by a through-hole method, and belong to the technical field of residual stress testing. Background technique [0002] The through-hole method is a commonly used method for measuring the residual stress of thin plate parts. This method uses strain rosettes to measure the strain caused by stress release around the hole after drilling, and then calculates the residual stress value according to the theory of elasticity. There are many factors affecting the measurement accuracy of the through-hole method, mainly including the accuracy of the drilling device, the measurement error of the rosette, and the theoretical calculation error, etc., and these factors affect each other, which is relatively complicated. Therefore, the calibration problem of the measurement accuracy of the through-hol...

Claims

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Application Information

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IPC IPC(8): G01L1/26
CPCG01L1/26
Inventor 潘龙王保升徐振钦闫注文洪磊王玉文
Owner 江苏普埃图机电科技有限公司
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