GB563859A - Improvements in or relating to methods of forming circular bodies or conical discs suitable for use in the construction of vehicle wheels or the like - Google Patents

Abstract

563,859. Making conical discs for vehicle wheels &c. BORG-WARNER CORPORATION. Nov. 2, 1942, No. 15400. Convention date, Nov. 3, 1941. [Classes 83 (ii) and 83 (iv)] Conical discs for the construction of vehicle wheels are made from flat stock by bending and welding into tubular form and rolling the strip to a taper either before or after welding to produce the conical shape. Tapering after welding may be effected between a conical roll 27 and a cylindrical roll 26 having a flange 29 to prevent the work from leaving the pass at its wider end. In a modification, oppositely arranged conical rolls 30, 31, Fig. 3, are employed. The coning of the part is limited by contact of the flange 29 with the surface 70. The work engages the flange 29 by one edge only until the coning is complete. In further forms, sets of conical rolls similarly arranged are employed, the pass converging towards the larger ends of the rolls. The tube may be rolled on a cylindrical roll 36, Fig. 9, by a traversed roll 37 that gradually approaches the roll 36. The tube may be forced over a flaring mandrel 40 by a pusher 39, a roll 37 assisting flow. In a further form, the tube is forced over a conical mandrel surrounded by conical rolls. The thick centre of the conical discs may be flanged over, for hub connection, whilst supported on a conical mandrel, either by a traversed roll or by a die 48, Fig. 13. In another method reversely arranged, double blanks 51, 52, Fig. 14, are cut without waste from a strip, the blank 51 is thinned at the edges by rolling, is cut along the centre line trimmed if desired, and bent up to conical form and welded. The blank 52 is similarly treated but is thinned at the centre.