由于使用转台压力机能大大提高生产率,因而金属板料加工工业已开始大量使用这种压机。但在操作过程中,它有二个主要消耗时间的工序用在板料切割上,通常要先在金属板上冲切一系列小孔,然后用一冲槽的冲头把已冲好孔的板料再冲成一块块小的(成品)板片。这样加工有如下明显缺点:首先,在切板片时会产生许多废料;其次,用一台价值25000镑的机床去切割板料不合算。在转台压力机上作修剪加工还有一个潜在的缺陷,即冲头在工件上冲出的许多齿形缺口有时会凹凸不齐,要切除这些缺口须耗费大量工时,这会极大地妨碍 The use of turret presses can greatly increase productivity, so the sheet metal processing industry has begun extensive use of such presses. However, during operation, it has two major time-consuming processes for sheet metal cutting, usually punching a series of small holes in a metal plate and then punching a punched Sheet and then red into a piece of small (finished) plate. Such processing has the following obvious disadvantages: First, there is a lot of scrap generated when slicing the sheet; second, it is uneconomical to cut the sheet with a machine tool worth 25,000 pounds. There is also a potential drawback of trimming on turntable presses, where many toothed notches punched out of the workpiece by the punch are sometimes jagged, requiring considerable labor-intensive removal of these notches, which greatly hinders