134 超音波援用によるメカニカルクリンチングの高強度化(塑性加工とその周辺技術)

概要

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Mechanical clinching is a mechanical joining method that has been attracting considerable attention as an alternative to spot welding or riveting, because of the many advantages it offers in assembling aluminum panel parts. However, the applications of this method are limited because it affords low peeling strength ; therefore, in order to increase the applicability of this method, it is necessary to improve the peeling strength afforded by it. In this study, a new method of mechanical clinching was devised whereby high-frequency ultrasonic vibration is applied to work pieces in a vertical direction. This vibration generates friction between the work pieces, and adhesion force is improved by destruction of oxide film. As a result, the peeling strength of ultrasonic assisted mechanical clinch is improved by 30 % compared with no ultrasonic assisted mechanical clinching, and improved by 95 % compared with the strength of general mechanical clinching : no ultrasonic assist and no degreasing condition.
一般社団法人日本機械学会の論文
2009-11-06