沖孔模設計外文翻譯-其他專業(yè)-全文預覽
【正文】 from the ram of the press .Afer peration of the work material,the two punches enter the die bushing for a slight distance. The female member, or die, consists of two die bushings inswetwd in die block. Since this press tool punches holes to the diameters required, the diameters of the die bushings are larger than those of the punches by the amount of clearance. Since the work material stock or workpiece can cling to a punch on the upstroke, it may be necessary to strip the material from the punch .Springloaded strippers hold the work material against the die block until the punches are withdrawn from the punched holes .A workpiece to be pierced is monly held and located in a nest posed of flat plates shaped to encircle the outside part contours. Stock is positioned in dies by pins, blocks, or other types of stops for locating before the downstroke of the ram. Blanking Die Design A die replace the die bushing and the two piercing punches are replaced by one blanking punch .A stock stop is incorporated
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鄂ICP備17016276號-1