公开(公告)号：US3606787A

公开(公告)日：1971-09-21

申请号：US3606787D

申请日：1968-12-31

申请人： UMEHARA YOZABURO

发明人： UMEHARA YOZABURO

IPC分类号： B21D51/10 ,  B21D39/02

CPC分类号： B21D51/10

摘要： A PROCESS AND APPARATUS FOR PRODUCING SPRING PINS BY AUTOMATICALLY CUTTING INTO A PREDETERMINED LENGTH A LENGTH OF RECTANGULAR PLATE BLANK SO AS TO HAVE A WAVE-SHAPED CUT EDGE AND WINDING THE BLANK INTO THE PIN SHAPE. THE APPARATUS INCLUDES A MANDREL WHICH SERVES AS A CORE AROUND WHICH IS WOUND THE BLANK, FOUR TOOL POSTS EACH HAVING ONE MOVABLE DIE RESPECTIVELY DISPOSED OUTWARDLY PERIPHERALLY AND RADIALLY OF SAID MANDREL, A CONTROL DEVICE DISPOSED UPON THE FRONT SIDE OF THE MACHINE FRAME UPWARDLY AND TO THE LEFT OF SAID MANDREL HAVING A MOVABLE CONTROLLING MEMBER AND A GUIDE STANK DISPOSED UPON THE FRONT SIDE OF THE MACHINE FRAME UPWARDLY AND TO THE RIGHT OF SAID MANDREL FOR GUIDING SAID BLANK, WHEREBY THE LEADING EDGE OF THE BLANK TRANSFERRED ALONG THE GUIDE STAND IS ABUTTED AGAINST THE CONTROLLING MEMBER SO AS TO CONTROL THE LENGTH OF CUT, THEREAFTER THE BLANK IS CUT INTO A PREDETERMINED LENGTH SO AS TO HAVE A WAVE-SHAPED CUT EDGE BY A PAIR OF MATING CORRUGATED CUTTERS FORMED ON THE OPPOSED SURFACES OF THE GUIDE AND THE DIE OF THE TOOL POST, THE CUT BLANK IS WOUND AROUND THE MANDREL BY THE DIES OF THE TOOL POSTS, SO AS TO FORM A SPRING PIN HAVING A WAVESHAPED GROOVE AND FINALLY THE MANDREL IS RETRACTED SO AS TO AUTOMATICALLY DROP THUS FORMED SPRING PIN.