Rack assembly for forming splines in thin-wall member

Details Rack assembly for forming splines in thin-wall member Rack assembly for forming splines in thin-wall member

B - Operations, Transporting

21

H

90/22

B21H 5/00 (2006.01) B21D 53/28 (2006.01) B21H 5/02 (2006.01)

Patent

CA 1297326

P-352 RACK ASSEMBLY FOR FORMING SPLINES IN THIN-WALL MEMBER ABSTRACT An apparatus (10) and die assembly (26,30) for forming a splined power transmission member from a thin-walled blank. The apparatus (10) comprises a pair of die assemblies (26,30), each including a supporting frame (28), first (42) and second (44) die bodies independently mounted on the supporting frame (28) in end-to-end coaxial relationship with each other, with rough (46) and finish (48) spline-forming surfaces formed on the first (42) and second (44) die bodies, respectively. The pair of die assemblies (26,30) are supported with the spline-forming surfaces of the respective die bodies (42,44) in spaced, opposed, parallel relationship to each other. A power drive mechanism sequentially moves the pair of die assemblies (26,30) in opposed directions from a neutral position in which the rough spline- forming surface (46) of the first die body (42) of one of the pair of die assemblies (26) is in opposed relationship to the finish spline-forming surface (48) of the second die body (44) of the other of the pair of die assemblies (30). The power drive means effectuates a rough spline- forming stroke in which the die assemblies (26,30) move from the neutral position first to a position in which the rough spline-forming surface (46) of the first die body (42) of the one assembly (26) is in opposed parallel relationship to the rough spline-forming surface (46) of the first die body (42) of the other assembly (30) and then return the die assemblies (26,30) to the neutral position. Subsequently, there is a finish spline-forming stroke in which the die assemblies (26,30) are moved first from the neutral position to a position in which the finish spline-forming surface (48) of the second die body (44) of one of the assemblies (26) is in opposed parallel relationship to the finish spline-forming surface (48) of the second die body (44) of the other die assembly (30) and then returned to the neutral position.

536041

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