壓力機(ji)(ji)由電機(ji)(ji)經過傳(chuan)(chuan)動(dong)(dong)機(ji)(ji)構帶(dai)動(dong)(dong)工(gong)(gong)作(zuo)機(ji)(ji)構,對工(gong)(gong)件(jian)施加工(gong)(gong)藝(yi)力。傳(chuan)(chuan)動(dong)(dong)機(ji)(ji)構為皮帶(dai)傳(chuan)(chuan)動(dong)(dong)、齒輪傳(chuan)(chuan)動(dong)(dong)的(de)減速機(ji)(ji)構;工(gong)(gong)作(zuo)機(ji)(ji)構分螺(luo)旋機(ji)(ji)構、曲柄連桿機(ji)(ji)構和液壓缸。
壓(ya)(ya)(ya)力機(ji)分為(wei)(wei)四(si)柱型氣液(ye)增(zeng)壓(ya)(ya)(ya)機(ji)、壓(ya)(ya)(ya)力機(ji)分螺旋(xuan)壓(ya)(ya)(ya)力機(ji)、曲柄壓(ya)(ya)(ya)力機(ji)和液(ye)壓(ya)(ya)(ya)機(ji)三大類。曲柄壓(ya)(ya)(ya)力機(ji)又稱為(wei)(wei)機(ji)械(xie)壓(ya)(ya)(ya)力機(ji)。
螺(luo)旋壓力機無(wu)固(gu)定(ding)下(xia)死(si)點,對較大(da)(da)的(de)模鍛件(jian),可以多次(ci)打擊成形(xing),可以進行(xing)單打、連打和寸(cun)動(dong)。打擊力與(yu)工件(jian)的(de)變形(xing)量(liang)有關,變形(xing)大(da)(da)時打擊力小,變形(xing)小(如冷擊)時打擊力大(da)(da)。在這些(xie)方面,它與(yu)鍛錘(chui)相似。但它的(de)打擊力通過機架封閉,故工作平穩,振動(dong)比(bi)鍛錘(chui)小得多,不需要很大(da)(da)的(de)基礎。
壓力機(ji)的下部都(dou)裝有鍛(duan)件頂(ding)出裝置。螺旋壓力機(ji)兼有模鍛(duan)錘、機(ji)械壓力機(ji)等(deng)多種鍛(duan)壓機(ji)械的作用(yong)(yong),性(xing)能強,可(ke)用(yong)(yong)于(yu)模鍛(duan)、沖裁、拉(la)深(shen)等(deng)工藝(yi)。此外(wai),螺旋壓力機(ji)結構簡單(dan),制造容易(yi),所(suo)以(yi)應用(yong)(yong)廣泛。