Device and method for testing bending property of joint for welding and connecting dissimilar materials

Abstract

The invention relates to a device and a method for testing the bending property of a joint for welding and connecting dissimilar materials, and solves the problem that the center of a welding line of a test piece and a pressure head cannot be always kept on the same vertical surface according to the test requirement during test operation of a universal testing machine. The technical scheme is that: two wing plates are symmetrically distributed on two supporting rollers of the device to support the dissimilar metal test piece and prevent the test piece from moving left and right in the bendingprocess; meanwhile, the two wing plates have functions of winding and guiding, so that the test piece is wound on the edge of the pressure head; the supporting wing plates can do arc movement with the test piece along tail end shafts of supporting plates in the testing process; and the test piece and the pressure head can be always kept on the same axis under the action of two supporting plates and a fastening system thereof. Through the method and the device, the dissimilar materials with large difference in physical properties can also be tested by the conventional universal mechanical testing machine, so that the test quality of the bending mechanical property of the joint for welding and connecting the dissimilar materials by using the universal testing machine is improved to a great extent, and time and economic cost are greatly saved.

Description

Technical field: [0001] The invention belongs to the field of material mechanics testing, in particular to a joint bending performance testing device and method for welding and connecting dissimilar materials. Background technique: [0002] In the mechanical performance testing and research of welding metal materials, there is a very important mechanical performance testing test—bending performance testing test to measure the bending angle, bending strength, and obtain the corresponding fracture index through the test, which is stipulated at home and abroad. corresponding technical standards. [0003] Retrieve relevant domestic and foreign literature In the EPO patent retrieval database of the European Patent Office, two Japanese scholars, FUKUDA TOSHIHIKO and KUMAGAL MASAKALI, conducted research on the bending performance of welded lap joints, but they still used a winding bending test method and device with one end fixed . At present, there are few documents documenting ...

AI Technical Summary

Problems solved by technology

[0006] This test device is currently a single set of test equipment. Due to the large space required, it is difficult to apply to the electronic universal mechanical testing machine. At the same time, domestic and foreign manufacturers have not yet produced a test device that can integrate the above two methods for the performance test of welded bending joints. Experimental scientific instruments, due to these factors in the test, these test equipment and methods have brought many problems to the bending performance test of the welded joints of different materials, that is, the centerline of the weld seam cannot always be consistent with the test process of the welded joints of different materials on the existing universal testing machine. The indenter is on the same vertical plane, the test often fails or the error is large

It is not only time-consuming and laborious, but also increases a lot of economic costs

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