不銹鋼封頭的熱沖壓成型工藝過程說明
在封頭沖(chong)(chong)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)型(xing)時,為(wei)了(le)降低坯料與模具間的(de)摩擦力(li),沖(chong)(chong)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)型(xing)時大(da)都(dou)在下模的(de)表(biao)面涂以潤(run)滑(hua)劑(ji)。不銹鋼封頭沖(chong)(chong)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)型(xing),一般使(shi)用(yong)的(de)潤(run)滑(hua)劑(ji)為(wei)55%石墨(mo)+45%機(ji)油。封頭沖(chong)(chong)壓(ya)(ya)(ya)(ya)設(she)備及成(cheng)(cheng)型(xing)過程見圖4-30. 壓(ya)(ya)(ya)(ya)力(li)機(ji)噸位的(de)選(xuan)擇:毛(mao)坯厚度(du)8=30~40mm,壓(ya)(ya)(ya)(ya)力(li)機(ji)噸位應≤400噸,毛(mao)...