無錫精密鈑金加工的沖(chong)(chong)(chong)(chong)裁(cai)加(jia)工(gong)(gong)是(shi)利用模具使板(ban)料(liao)(liao)分離的一種(zhong)沖(chong)(chong)(chong)(chong)壓(ya)加(jia)工(gong)(gong)方法。沖(chong)(chong)(chong)(chong)裁(cai)既(ji)可(ke)以得到平(ping)板(ban)零件(jian)，也可(ke)以為彎曲、拉深、成形等工(gong)(gong)序準備毛坯。是(shi)利用沖(chong)(chong)(chong)(chong)模的刃口使板(ban)料(liao)(liao)沿一定的輪廓(kuo)線產(chan)生(sheng)剪切(qie)變形并分離。沖(chong)(chong)(chong)(chong)裁(cai)在沖(chong)(chong)(chong)(chong)壓(ya)生(sheng)產(chan)中所(suo)占的比例最大。在沖(chong)(chong)(chong)(chong)裁(cai)過程(cheng)中，除剪切(qie)輪廓(kuo)線附近的金屬外，板(ban)料(liao)(liao)本(ben)身并不(bu)產(chan)生(sheng)塑(su)性變形，所(suo)以由平(ping)板(ban)沖(chong)(chong)(chong)(chong)裁(cai)加(jia)工(gong)(gong)的零件(jian)仍然是(shi)一平(ping)面(mian)形狀

沖裁(cai)可分為(wei)剪切(qie)(qie)(qie)、落(luo)料(liao)、沖孔(kong)、切(qie)(qie)(qie)斷、切(qie)(qie)(qie)口和(he)(he)剖切(qie)(qie)(qie)等。①剪切(qie)(qie)(qie)是(shi)將(jiang)大平板(ban)剪切(qie)(qie)(qie)成條料(liao)。②落(luo)料(liao)是(shi)沿一條封閉(bi)的(de)分離線將(jiang)所需(xu)的(de)部分從(cong)板(ban)料(liao)上分離出來。③切(qie)(qie)(qie)邊(bian)是(shi)切(qie)(qie)(qie)去(qu)拉深件(jian)的(de)飛邊(bian)。④沖孔(kong)是(shi)在板(ban)料(liao)上沖出孔(kong)、槽和(he)(he)百葉窗等