Method for testing recesses and dents on surface of automobile body

Abstract

The invention relates to a method for testing recesses and dents on the surface of an automobile body, and belongs to the technical field of vehicle detection. The method includes the following steps:adjusting constrained tooling to make a front cover, a rear cover, a vehicle door and a body-in-white fixing constrained point being consistent to CAE analysis according to the constrained requirements of a denting resistance test on the front cover, the rear cover, the vehicle door and body-in-white degrees of freedom during the CAE analysis; installing bending loaded electric cylinders and sensors, arranging the bending loaded electric cylinders according to the positions and numbers of the loading points of a bending stiffness test during the CAE analysis, and arranging the sensors according to the deformation positions and numbers of detected points of the bending stiffness test during the CAE analysis; performing loading, and performing loading testing on the front cover, the rear cover, the vehicle door and the body-in-white; and completing the test, and turning off equipment in a reversed order according to the boot order after the inspection equipment is normal. Through the simulating of an actual constrained condition and the adoption of a reasonable loading mode, loading force can be linearly increased, and the accuracy of stiffness tests on the surface of an automobilebody can be maximumly ensured.

Description

technical field [0001] The invention relates to a method for testing depressions and dents on the surface of an automobile body, belonging to the technical field of vehicle detection. Background technique [0002] The surface quality of body panels is an important index and characteristic that affects the performance of the body. Body coverings are often subjected to external loads during use, such as static loads such as human touch and pressure, snow accumulation, and impact loads such as stones and hailstones during travel. In addition, body panels are usually characterized by large dimensions and large curvatures, which are prone to dent deflection and even permanent deformation under the above loads. [0003] In the prior art, there is already a static stiffness test bench for the fixing point of the body, which is used for testing the static stiffness of the body-in-white of the research vehicle, simulating the constraints and load conditions in the actual working pro...

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Problems solved by technology

In addition, body panels are usually characterized by large dimensions and large curvatures, which are prone to dent deflection and even permanent deformation under the above loads

[0003] In the prior art, there is already a static stiffness test bench for the fixing point of the body, which is used for testing the static stiffness of the body-in-white of the research vehicle, simulating the constraints and load conditions in the actual working process, and used for testing the installation and fixing of the body. Static point stiffness can also be used to test the dent resistance of sheet metal parts on the outer surface of the car body, but only a test bench is disclosed in the prior art, and there is no specific stiffness test method for different parts of the car

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