Apparatus and method for testing the welding strength of bolts and nuts

Abstract

The invention provides a bolt / nut weld strength testing device. The device is used for testing the weld strength of a bolt or nut welded on a plate and comprises a pressure applying machine, pressure separation equipment and a calculator, wherein the pressure applying machine comprises a workbench and a pressure applying arm; the pressure applying arm is arranged above the workbench and can reciprocate close to or far from the workbench; the pressure separation equipment comprises a first pressure separation part and a second pressure separation part; one end of the first pressure separation part is connected on the workbench and the other end of the first pressure separation part is provided with a bearing surface for bearing the plate; the second pressure separation part is connected on the pressure applying arm; the calculator is connected with the pressure applying machine; the pressure applying arm drives the second pressure separation part to act on the bolt or the nut and separate the bolt or the nut from the plate; the calculator is used for collecting the pressure value of the bolt or the nut in the pressure separation process. The device can obtain the quantified weld strength of the bolt or the nut, can judge whether the weld strength of the bolt or the nut is good or not through data comparison and is stable and reliable in detection process. The invention also relates to a bolt / nut weld strength testing method.

Description

technical field [0001] The invention relates to the technical field of automobile crash tests, in particular to a device and method for testing the welding strength of bolts and nuts. Background technique [0002] At present, all major automobile producing countries in the world have formulated strict automobile collision safety regulations, and automobile development and production must pass strict implementation regulations. The process of automobile development and production needs to test the welding strength of nuts and bolts of the body-in-white. Therefore, it is necessary to verify and test the strength of the nuts and bolts of the body-in-white welded with nuts and bolts and mounting parts (such as seats, etc.) to make the body-in-white The body can meet and guarantee the strength and safety regulations of real vehicles. [0003] That is to say, the welding strength of the bolts and nuts on the body-in-white is directly related to the success or failure of the test,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bolt and nut welding strength testing device, which can obtain the quantitative welding strength of bolts and nuts, and can judge whether the welding strength of bolts and nuts is good or bad through data comparison, and the detection process is stable and reliable, and is suitable for mass production It can effectively find the problem of unstable welding strength of bolts and nuts

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