Forming chamfered flange and splines in thin-wall member

Details Forming chamfered flange and splines in thin-wall member Forming chamfered flange and splines in thin-wall member

B - Operations, Transporting

21

H

80/29

B21H 5/04 (2006.01) B21D 53/28 (2006.01)

Patent

CA 1303389

P-348 FORMING CHAMFERED FLANGE AND SPLINES IN THIN-WALL MEMBER ABSTRACT OF THE DISCLOSURE A power transmission member (42), as well as apparatus (10,110,210) and method for forming the power transmission member (42) from a thin-walled blank. The apparatus (10,110,210) comprises a pair of opposed toothed dies (26,30;112,114;138,140). A toothed mandrel (40) is rotatably supported between the dies and received within the sleeve portion (46), flatly engaging an annular end wall (44) of the member. The dies (26,30;112,114;138,140) and mandrel (40) have chamfered surfaces (68,70), respectively, for forming a chamfered flange (66) on the power transmission member (42) as the toothed surfaees of the dies are relatively moved during the splining operation. A loading notch (122) is formed intermediately along the toothed work surface of each die member (112,114;138,140) for receiving a blank to be splined when the notches (122) are vertically aligned with one another in a neutral or loading position on opposite sides of the mandrel. Groups of rough (124,126,128) and finish (130,132) forming teeth are spaced along opposite sides of the notches (122), and progressively increase in height from group-to-group away from the notches. Initial opposed movement of the dies (112,114;138,140) from the loading position simultaneously engages opposing pairs of similar rough forming teeth (124,126,128) and the mandrel teeth (48) with the sleeve portion (46) therebetween, rough forming splines therein. The dies (112,114;138,140) are then moved in the reverse direction, simultaneously engaging opposed pairs of similar finishing teeth (130,132) and the mandrel teeth (48) with the sleeve (46) therebetween to finish forming the splines (64) therein.

593432

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