Bending test device for dissimilar steel welding process evaluation

Abstract

The invention discloses a bending test device for dissimilar steel welding process evaluation. The device comprises a base, wherein fixed press roller assembly and a moving press roller assembly are mounted on the base; the fixed press roller assembly comprises a fixed roller seat fixed on the base, and a fixed press roller is rotationally mounted on the fixed roller seat; the moving press roller assembly comprises a moving roller seat, a moving press roller is rotationally mounted on the moving roller seat, a placement gap is formed between the moving press roller and the fixed press roller, and a press device is arranged on the fixed roller seat; a rotary transmission part and a linear transmission part are mounted on the base, the rotary transmission part is rotationally mounted on the base and is in transmission connection with the moving roller seat, the linear transmission part is linearly and glidingly mounted on the base and is in transmission connection with the rotary transmission part, and the linear transmission part is matched with a press head of a pressure testing machine. The bending test device can be matched with the pressure testing machine to drive the moving roller seat to rotate around the center of the fixed press roller, a welded sample is relatively uniformly stressed when bent, steel material deformation on two sides of a weld joint is consistent, accuracy of a test result is guaranteed, and the effort is saved.

Description

technical field [0001] The invention relates to a bending test device, in particular to a bending test device for dissimilar steel welding process evaluation. Background technique [0002] Welding samples for dissimilar steel welding process evaluation, due to the different strength and hardness of the two materials, when using a traditional universal testing machine for bending tests, the samples often deviate, and in severe cases, the samples are scrapped, resulting in inaccurate or inaccurate test results. result. And the present inventor has submitted the dissimilar steel welding procedure qualification welding sample test device that application number is 201310149274.2 before, this test device can carry out bending test to welded sample better, but still has the following deficiencies: 1. The bending test device needs to be bent manually, and the operation is laborious, and the bending accuracy of the sample will be affected during manual bending; The center distance...

AI Technical Summary

Problems solved by technology

[0002] Welding samples for dissimilar steel welding process evaluation, due to the different strength and hardness of the two materials, when using the traditional universal testing machine for bending tests, the samples often deviate, and in severe cases, the samples are scrapped, resulting in inaccurate or inaccurate test results. result

And the inventor has submitted the application number before and is 201310149274.2 the dissimilar steel welding procedure qualification welding sample test device, this test device can carry out bending test to welding sample better, but still has the following deficiencies: 1. The bending test device needs to be bent manually, and the operation is laborious, and the bending accuracy of the sample will be affected when the manual bending is performed; The center distance between the pressure rollers is fixed, and the diameter of the dynamic pressure roller must also change when the diameter of the fixed pressure roller changes, resulting in a large amount of machining

And it is not possible to weld samples with a constant pressure roller diameter > 50mm

3. The design defect of the clamping mechanism limits the bending operation of the welded specimen with 4 times the wall thickness

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