小孔冲压的工艺特点与模具设计.pdf

制造技术 /工艺装备 2009 8 ( , 118002) : , , , , , , , , , , : ; ; ; ; : TH 16; TG 76 : B : 1671 3133( 2009) 0 8 0083 04 P rocess characteristics and die design of sm all holes stam p ing JIANG J ing ( L iaon ing J id ian P o ytechn ic, Dandong 118002, L iaon ing, CHN ) A bstrac t: T he process of punching ho es and techno og ica features is d iscu ssed in deta i . F or the w ho e eng th or ientation of punch fo r sm a ho es, the gu ide s eeve is insta ed at str ipper p ate and the prec ision o f punching sm a ho e is mi proved through o rienta tion o f guide pi ar. T he m ater ie is ho d dow n by sheath before punch fo r sm a ho es. Because o f sm a con tact a rea be wt een sheath and m ater ie , pressure concentrate at the surrounding o f sm a ho e. So the ma terie is com pressed from three d irec tions, the surround ing of sm a ho e is w ithout burr and surface f in ish. D esign princ ip e of die is described through ana yzing char ac teristics o f itt e ho e punching. K ey w ord: sm a ho es stamp ing; o rienta tion; sheath; stam ping gap; princ ip e d td / t 1, d / t, , , , , , , , , , , 1 , , , , 2000 ~ 5000 , 001~ 002mm 1) 1 3) , , , , 2) , 1