A bending test device for dissimilar steel welding process qualification

Abstract

The invention discloses a bending test device for dissimilar steel welding process evaluation, which comprises a base on which a constant pressure roller assembly and a dynamic pressure roller assembly are installed, the constant pressure roller assembly includes a fixed roller seat fixed on the base, the fixed roller The fixed pressure roller is installed on the seat for rotation; the dynamic pressure roller assembly includes the movable roller seat, the dynamic pressure roller is installed on the movable roller seat for rotation, the gap is set between the dynamic pressure roller and the fixed pressure roller, and the fixed roller seat is provided with a pressure roller. Tightening device, the base is equipped with a rotary transmission part and a linear transmission part, the rotary transmission part is installed on the base in rotation and connected with the moving roller base, and the linear transmission part is installed on the base in a straight line and is connected to the rotary transmission part. The linear transmission part cooperates with the indenter of the pressure testing machine. The bending test device can cooperate with the pressure testing machine to drive the moving roller seat to rotate around the center of the fixed pressure roller. When bending, the force of the welded sample is relatively uniform, so that the deformation of the steel on both sides of the weld is consistent, ensuring the accuracy of the test results and saving lost strength.

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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