| 摘要 |
A clinching method includes establishing a first layer on a second layer. The first layer has an aperture formed therein and is thinner than the second layer. A rotating punch is engaged with the second layer through the aperture in the first layer, thereby generating frictional heat and softening the second layer. The rotating punch is configured with at least a first diameter, a shoulder, and a second diameter that is larger than the first diameter. The rotating punch is pressed into the softened second layer, thereby causing at least some of the second layer to: back extrude through an annulus defined by the aperture in the first layer and at least one of the diameters of the punch; contact the shoulder of the rotating punch; and extend onto a surface of the first layer adjacent the aperture.
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