Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1990-04-18
1990-12-11
Combs, E. Michael
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
72456, 413 69, B21D 2221
Patent
active
049761315
ABSTRACT:
A redraw apparatus is provided for a can body making apparatus wherein the redraw carriage of the redraw apparatus is mounted for substantially friction-free sliding reciprocating movement over a pair of spaced apart support posts which are fixedly mounted on the housing holding the can forming and ironing dies. Also, a counterbalancing system is provided for applying a force to counterbalance the weight of a portion of structures used to reciprocate the redraw carriage. Additionally, a raw assembly is provided for supporting a ram for movement through the redraw apparatus and the can forming and ironing dies wherein a pair of spaced apart elongated shafts are fixedly mounted and a ram carriage having the ram attached thereto is provided with liquid bearings using liquid coolant comprising water having solubles contained therein for mounting the ram carriage on the elongated shafts for substantially friction free movement thereover. A guide liquid bearing is also used to ensure proper alignment of the ram. Also disclosed in a reciprocating ram which is supported solely by a liquid bearing wherein the liquid bearing using liquid coolant comprising water having solubles contained therein has a sufficient length to ensure the proper alignment of the leading portion of the elongated ram as it engages a can blank in a redraw assembly and moves it through the forming and ironing dies to form an elongated can body.
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Analysis and Design of Sliding Bearings, Lubrication Principles, pp. 5-66 thru 5-73, 10" Block-Head Universal Air Bearing Spindle.
Grims Conrad M.
Hahn Roger A.
Johansson Bert E.
Adolph Coors Company
Combs E. Michael
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