B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/67
B21D 26/02 (2006.01) B21K 1/42 (2006.01)
Patent
CA 1144007
(No. 62) ABSTRACT Apparatus for forming a sheet metal pulley from a cup- shaped blank in a single hydraulic forming operation. A pair of die holding members supports a plurality of groove-forming inner dies and is movably mounted on a base for horizontal reciprocal movement between open and closed die positions for capturing a pulley-forming blank therebetween. Tapered pins extend vertically through aligned openings formed in over- lapping shelf members of the die holding members to wedgingly clamp the dies toward each other and to lock them in a hori- zontally closed position. A ram plate is mounted on a plurality of vertical posts for reciprocal vertical movement with respect to the captured blank. The ram plate has a top die which exerts axial pressure on the hub portion of the blank during the hydraulic bulging of the blank side wall by a confined fluid within the blank in cooperation with the groove-forming inner dies. A plurality of pistons mounted on the vertical ram plate cammingly engage mating surfaces provided on the posts and adjacent cam shafts to mechanically lock the ram plate die in a vertically closed position. A burst of high pressure is applied to the trapped, partially formed pulley to final form the pulley by setting the metal of the pulley against the inner dies by exceeding the elastic limit of the metal, eliminating springback after the pulley is removed from the dies. Certain of the groove-forming inner dies are movable vertically independently of the top ram plate and hub die by hydraulic pistons to permit variation in the groove-forming sequence during the pulley forming procedure.
375984
Kraft Derald H.
Wolbert Fred A.
Macrae & Co.
Spun Steel Ltd.
LandOfFree
Apparatus for hydraulically forming sheet metal pulleys does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for hydraulically forming sheet metal pulleys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for hydraulically forming sheet metal pulleys will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-539862