公开(公告)号：JPS60174233A

公开(公告)日：1985-09-07

申请号：JP2692784

申请日：1984-02-17

Applicant: SUMITOMO HEAVY INDUSTRIES

Inventor： TABATA TAKEYA ,  KAMIIDE TAKUO

IPC: B21K1/30

Abstract: PURPOSE:To manufacture a ring-shaped gear by means of forging, to shorten a manufacturing time, and to improve the strength of a gear bottom and the yield of a material by placing a ring-shaped material on a die, rotating it by a prescribed pitch each by a feed roller, and moving up and down a tooth die provided on a punch. CONSTITUTION:When a clutch 4 is operated, an eccentric shaft 2 rotates, and a slide 8 to which an eccentric disk 7 of its tip has been fitted so as to be oscillatable moves up and down along a guide fixed to a frame 1. A punch 9 provided with plural gear forming tooth dies 9a on the lower face is fixed to the lower part of the slide 8. A die 12 whose upper face 12a forms a part of a cylinder is fixed onto a bed 11 bulged from the frame 1 and provided, and a ring-shaped base material 13 heated to a forging temperature is placed on the face 12a. When the slide 8 moves up and down, the tooth die 9a gnaws at the upper face of the base material 13, and a tooth die is formed on the outside periphery of the base material 13. The material 13 is inserted and held by a cushion roller 15 supported by an pneumatic cylinder 14 and a feed roller 16, and rotated by an angle corresponding to a formed tooth die pitch, when the slide 8 is in the upper part.

公开(公告)号：JPS60174232A

公开(公告)日：1985-09-07

申请号：JP2692684

申请日：1984-02-17

Applicant: SUMITOMO HEAVY INDUSTRIES

Inventor： TABATA TAKEYA ,  KAMIIDE TAKUO

IPC: B21K1/30

Abstract: PURPOSE:To manufacture a ring-shaped gear by means of forging, to shorten a manufacturing time, and to improve the strength of a gear bottom and the yield of a material by placing a ring-shaped material on a cylindrical die, rotating and feeding it by a prescribed pitch each, and moving up and down a tooth die provided on a punch. CONSTITUTION:When a clutch 4 is operated, an eccentric shaft 2 rotates, and a slide 8 to which an eccentric disk 7 of its tip has been fitted so as to be oscillatable moves up and down along a guide fixed to a frame 1. A punch 9 provided with plural gear forming tooth dies 9a on the lower face is fixed to the lower part of the slide 8. A die use shaft 11 is supported axially so as to be rotatable by the frame 1, and to this end, a cylindrical die 12 with a collar 14 is fixed, on which a ring-shaped material 13 heated to a forging temperature is inserted and held. When the slide 8 moves up and down, the tooth die 9a of the punch gnaws at the upper face of the material 13, and a tooth die is formed on the outside periphery of the material 13. The start 11 is rotated by an angle corresponding to a formed tooth die pitch, when the slide is in the upper part, by a worm wheel 15 fixed to said shaft and a worm 16 engaged with it, and the material 13 becomes a gear.