公开(公告)号：US3796851A

公开(公告)日：1974-03-12

申请号：US3796851D

申请日：1972-07-28

申请人： BERNAL ROTARY SYST INC

发明人： PFAFF A

IPC分类号： B23H1/00 ,  B23Q35/12 ,  B23P1/12

CPC分类号： B23H1/00 ,  B23Q35/12 ,  B23Q2735/067

摘要： A cylindrical cutting die is made by mounting a line drawing of the pattern to be cut on a copy cylinder supported on the table of a milling machine for rotary movement in unison with a negative cylinder. A scanning device senses the pattern on the copy cylinder and coordinates rotary movement of the cylinders and linear movement of the machine table to cause a cutter mounted on the machine spindle to form a grooved reproduction of the pattern on the negative cylinder, which is then used in an electrical discharge machine, equipped with a fixture for rotatably supporting the negative cylinder on the machine head in axially parallel relation with a die blank cylinder in the machine tank and for rotating the cylinders at equal rotational speed, to cause a raised cutting pattern to be machined on the die cylinder corresponding to the grooved reproduction on the negative cylinder.