Dynamic quality detection method for whole assembly of automobile products
A quality inspection method and vehicle assembly technology, which can be used in vehicle testing, machine/structural component testing, measuring devices, etc., and can solve problems such as inability to dynamic quality control and assurance
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[0029] The present invention is used as a dynamic quality inspection method for the whole vehicle assembly of automobile products, and its evaluation index, standard inspection point, evaluation index calculation formula and evaluation index standard are respectively as follows:
[0030] (1) Evaluation index: Based on the "dynamic stiffness (K) of the assembly coupling interface between the chassis parts and the body parts of the automobile d )" as an evaluation index of the quality of assembly dynamics.
[0031] Dynamic stiffness K d =K+j2πfC, where K is the static stiffness of the coupling interface (Newton / m, N / m), C is the damping coefficient of the coupling interface (Newton·sec / m, Ns / m), and f is the dynamic force excitation frequency ( Hz), It is an imaginary unit. Dynamic stiffness has been proved by mechanical structure dynamics theory to accurately and comprehensively describe the dynamic characteristic index of coupling stiffness (resistance to elastic deformation) and ...
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