冲压工艺术语（5）
抽凸：沿着内孔周围将材料参与变形，而其他材料不产生明显的塑性流动，从而成形出低浅的凸包的一种冲压工序。
铆合：使两部分材料结合成一个整体的一种冲压工序。（它包括工件自铆和多个工件对铆）
压印：强行局部排挤材料，在工序件表面形成浅凹花纹，图案，文字或符号等一种冲压工序，被压印表面的背面并无对应浅凹和凸起。
Stamping process terminology (5)
Convexity: a stamping process in which the material is involved in deformation around the inner hole, while other materials do not produce obvious plastic flow, thus forming a low shallow convex hull.
Riveting: a stamping process that combines two parts of material into a whole. (it includes workpiece self riveting and multiple workpiece counter riveting)
Stamping: a stamping process in which materials are forced to be partially extruded to form a shallow concave pattern, pattern, character or symbol on the surface of the process part. There is no corresponding shallow concave or convex on the back of the surface to be stamped.
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