不銹鋼封頭的熱沖壓成型工藝過程說明
在(zai)(zai)封頭沖(chong)壓(ya)成(cheng)(cheng)型(xing)(xing)時,為了降(jiang)低坯料(liao)與模(mo)具間的摩擦力(li),沖(chong)壓(ya)成(cheng)(cheng)型(xing)(xing)時大都在(zai)(zai)下模(mo)的表面涂以潤(run)(run)滑(hua)劑。不銹鋼封頭沖(chong)壓(ya)成(cheng)(cheng)型(xing)(xing),一般使用(yong)的潤(run)(run)滑(hua)劑為55%石墨+45%機油。封頭沖(chong)壓(ya)設備及成(cheng)(cheng)型(xing)(xing)過(guo)程見圖4-30. 壓(ya)力(li)機噸位的選擇:毛(mao)坯厚(hou)度(du)8=30~40mm,壓(ya)力(li)機噸位應≤400噸,毛(mao)...