Device and method for intelligently measuring joint bending angles of welding and connection of dissimilar materials

Abstract

The invention discloses a device and a method for intelligently measuring joint bending angles of the welding and connection of dissimilar materials, and solves the problem that partial tests are unsuccessful because the conventional bending performance testing device cannot measure data of bending angles on site. The technical scheme is that: two symmetrical high-strength wing plates are arranged on two supporting rolls of the conventional three-point bending device so as to support a test piece and prevent the test piece from moving in the bending process; meanwhile, two precision bearing systems are introduced so as to construct a bending angle measurement device system which measures the bending angles of materials all the time in cooperation with a universal testing machine control system and a universal testing machine loading system. By the method and the device, the bending angles of welding materials can be directly obtained through the tests, the aim of controlling the tests by controlling the bending angles is fulfilled at the same time, and finally bending angle measurement tests are intelligently controlled so as to obtain reliable test data. The device improves measurement indexes of joint welding performance of material welding and connection of a universal testing machine, improves the accuracy of test data of the testing machine, and greatly saves time and economic cost.

Description

Technical field: [0001] The invention belongs to the field of material mechanics testing, and in particular relates to a joint bending angle measuring device and method for welding and connecting dissimilar materials. Background technique: [0002] In the mechanical performance test and research of welding metal materials, there is a very important mechanical performance test—bending performance test. Through the test, the bending angle, bending strength and corresponding fracture index can be obtained, which have stipulated the corresponding technical standards at home and abroad. [0003] Retrieval of relevant domestic and foreign literature In the European Patent Office EPO patent retrieval database, two Japanese scholars, FUKUDA TOSHIHIKO and KUMAGAL MASAKALI, conducted research on the bending properties of welded lap joints, but they basically used a winding bending test method with one end fixed and device. In the experiment, it is difficult to directly obtain the nu...

AI Technical Summary

Problems solved by technology

[0006] At present, the testing devices and methods commonly used at home and abroad can only test the bending performance of the specimen, but cannot directly and dynamically measure the bending angle angle; Calculating the bending angle, the result is due to the interference of the mechanical clearance of the testing machine itself and the wear of the transmission system, the accuracy is greatly reduced, and the error is large, which has a great impact on the experimental results

At the same time, several existing test devices mentioned above cannot solve the problem of ensuring that the entire bending performance test experiment is carried out as expected by using the bending angle to accurately control the test process; progress puzzle

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