| 摘要 |
<p>12 A SEGMENTED DRAWING DIE WITH A BINDING COLLAR ABSTRACT 5 [00351 THE PRESENT INVENTION PROVIDES A SHEET METAL DRAWING DIE ASSEMBLY (100). THE DIE ASSEMBLY (100) COMPRISES A DRAWING MEMBER (130) HAVING TWO OR MORE DIE SEGMENTS (I '34) AND A COLLAR (I 40) FOR BINDING THE TWO OR MORE DIE SEGMENTS TOGETHER WITH A PRE-TENSION FORCE F. DURING A DRAWING OPERATION, THE PRE-TENSION FORCE F 10 PROVIDES THE REACTION FORCE FOR PLASTICALLY DEFORMING A SHEET METAL (I 10) AT A DRAWING EDGE R2 ON THE DRAWING MEMBER (130). AT THE SAME TIME, THE PRE-TENSION FORCE ALLOWS THE DIE SEGMENTS (I 34) TO EXPAND WHEN A DRAWING FORCE EXCEEDS THE PRE-TENSION FORCE, THEREBY REDUCING THE FREQUENCY OF DIE CRACKING. 15 [0036]</p> |
