hollow punch

基本解释

In sheet metal, drawing is a process of forming flat sheet metal into hollow shapes by means of a punch that causes the metal to flow into the die cavity.
在钣金加工中，拉深是一种可以用冲头将平板加工成空腔的工艺，空腔的形状取决于模具的形状。
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In sheet metal, drawing is a process of forming flat sheet metal into hollow shapes by mean of a punch that causes the metal to flow into the die cavity .
在板金上，拉伸是一个通过冲床将平板金属冲入模腔拉成中空形状工件的工艺过程。
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The second positioning piece is arranged within the hollow tube in adjacency to the air vent, and includes a second punch hole communicated with the air vent.
一第二定位件，设置于所述中空管体内邻近所述出气口处，并包括一与所述出气口相连通的第二穿孔；
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