壓力機(ji)(ji)由(you)電(dian)機(ji)(ji)經過傳(chuan)動(dong)(dong)(dong)機(ji)(ji)構帶(dai)動(dong)(dong)(dong)工(gong)作(zuo)機(ji)(ji)構,對工(gong)件施加工(gong)藝(yi)力。傳(chuan)動(dong)(dong)(dong)機(ji)(ji)構為皮帶(dai)傳(chuan)動(dong)(dong)(dong)、齒輪傳(chuan)動(dong)(dong)(dong)的(de)減速機(ji)(ji)構;工(gong)作(zuo)機(ji)(ji)構分螺旋機(ji)(ji)構、曲柄連桿機(ji)(ji)構和(he)液壓缸(gang)。
壓(ya)(ya)力(li)(li)機分為四柱型氣液增壓(ya)(ya)機、壓(ya)(ya)力(li)(li)機分螺旋壓(ya)(ya)力(li)(li)機、曲柄(bing)壓(ya)(ya)力(li)(li)機和液壓(ya)(ya)機三(san)大類。曲柄(bing)壓(ya)(ya)力(li)(li)機又稱為機械壓(ya)(ya)力(li)(li)機。
螺旋壓力機無固定下死點,對較大(da)的模(mo)鍛件,可以多次打擊(ji)(ji)成形(xing),可以進(jin)行單打、連打和寸動(dong)。打擊(ji)(ji)力與工(gong)件的變(bian)形(xing)量(liang)有(you)關,變(bian)形(xing)大(da)時(shi)打擊(ji)(ji)力小,變(bian)形(xing)小(如(ru)冷擊(ji)(ji))時(shi)打擊(ji)(ji)力大(da)。在這(zhe)些方(fang)面(mian),它與鍛錘相似。但它的打擊(ji)(ji)力通過(guo)機架封閉(bi),故(gu)工(gong)作平穩,振動(dong)比鍛錘小得多,不需要很大(da)的基礎。
壓力(li)機(ji)(ji)的下部都(dou)裝有(you)鍛(duan)件頂出裝置(zhi)。螺旋(xuan)壓力(li)機(ji)(ji)兼有(you)模鍛(duan)錘、機(ji)(ji)械壓力(li)機(ji)(ji)等(deng)多種鍛(duan)壓機(ji)(ji)械的作用(yong),性能強,可用(yong)于模鍛(duan)、沖裁、拉深等(deng)工藝。此(ci)外,螺旋(xuan)壓力(li)機(ji)(ji)結構(gou)簡單,制造容(rong)易,所以應用(yong)廣泛。