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

Abstract

Provides a more accurate dynamic tensile stiffness measurement technology. In the method for measuring the dynamic tensile rigidity of an outer panel of an automotive component of the present invention, the indenter is pressed against the surface of the outer panel to be measured with a predetermined load in a predetermined pressing direction intersecting the surface of the outer panel to be measured. The method of deforming the outer panel to be measured and measuring the deformation state of the outer panel to be measured is characterized in that a grid is transferred to the surface of the measured portion of the outer panel to be measured. A reference mark is arranged around the measured portion of the outer panel, and the indenter is pressed against the surface of the measured portion of the outer panel with the load and the indenter is directed perpendicularly to the pressing direction. direction, and multiple cameras are used to simultaneously and repeatedly photograph the grid of the surface of the outer panel to be measured deformed due to the load of the indenter from multiple positions, based on the captured images data, calculate the three-dimensional position information of the grid based on the correspondence relationship with the reference mark, measure the change in the deformation state of the measured outer panel accompanying the movement of the indenter, and use it as the panel deformation Data output.

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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