Method and device for measuring dynamic tensile rigidity of outer panels of motor vehicle components

Abstract

[Task] It is to provide a technique for measuring dynamic panel stiffness in a higher accuracy. [Solution for task] A method for measuring dynamic panel stiffness of an outer panel for automobile parts by pushing an indenter onto a surface of an outer panel to be measured in a given pushing direction intersecting to the surface under a given load to deform the outer panel and measuring a deformation state of the outer panel, characterized in that grids arranged in a regular lattice form are transferred to a surface of a measuring site of the outer panel to be measured; fiducial markers previously knowing three-dimensional position information are arranged on the periphery of the measuring site of the outer panel; the indenter is pushed onto the surface of the measuring site of the outer panel under the load and moved in a direction perpendicular to the pushing direction, during which the grids on the surface of the outer panel deformed by loading of the indenter are simultaneously and repeatedly shot from plural positions by means of plural cameras; three-dimensional position information of the grids is calculated corresponding to the fiducial markers based on the shot image data to measure a change in the deformation state of the outer panel associated with the movement of the indenter, which is output as panel deformation data.

Description

technical field [0001] The invention relates to a method and a device for determining the dynamic tensile stiffness of an outer panel of a motor vehicle component. Background technique [0002] Dynamic tensile rigidity exists as one of the performances required for outer panels of automotive parts such as doors, hoods, and roofs. In the case where the dynamic tensile rigidity is insufficient, for example, during wiping operations such as car washing or waxing in which a moving load is applied to the outer panel with a palm, cloth, etc. along the panel shape, the A so-called dent (べこつき) sound is generated, and the sense of quality of the vehicle is greatly impaired. Especially in recent years, since vehicle body weight reduction has become thinner and panel designs have become more diversified, sag tends to occur easily, and securing dynamic tensile rigidity has become a major issue for automobile manufacturers. [0003] The evaluation of the tensile rigidity of the convent...

AI Technical Summary

Problems solved by technology

In the case where the dynamic tensile rigidity is insufficient, for example, during wiping operations such as car washing or waxing in which a moving load is applied to the outer panel with a palm, cloth, etc. along the panel shape, the The so-called dent (べこつき) sound is produced, and the sense of quality of the vehicle is greatly damaged

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