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通常使用常规气垫进行板材拉深，噪声和制件质量并不比用双动拉抻压力机更好，但是，如果使用数控气垫，情况就会好得多。下面介绍日立造船公．司的数控气垫（见下图）。该气垫有两个特点：（１）在拉深过程中拉深力可控气垫的四角各有一个油缸，当气垫下行时，四个油缸内的油
Conventional air-cushioning is generally used for sheet metal drawing, and noise and part quality are no better than double-acting pull presses, but the situation is much better with a CNC air cushion. The following describes Hitachi Shipbuilding. Division NC air cushion (see below). The air cushion has two characteristics: (1) in the drawing process can be controlled pull the four corners of the air cushion have a cylinder, when the air cushion down, the four cylinder oil