GB1215208A - Handling apparatus for handling round workpiece blanks which are to be shaped by means of a dishing press - Google Patents

Abstract

1,215,208. Planishing. SCHLEIFENBAUM & STEINMETZ OHG. 13 Sept., 1968 [15 Sept., 1967], No. 43604/68. Heading B3H. Handling apparatus for round sheet metal blanks which are to be formed by a planishing or dishing press comprises a frame longitudinally movable along guide rails and provided with at least two vertically disposed supporting rollers spaced at a distance corresponding to a fraction of the diameter of the blank and three support rollers the axles of which are aligned with a point located remote from the supporting rollers by the radius of the blank. The press 2 has a gate 1 through which travel the guide rails 3 and 4 for chassis 5 and 6. The chassis 6 are connected by a crosspiece 7 comprising two guides for slides 8 adjustable by a sprindle 9 having screw-threaded sections 10 and 11 of opposite threads engaging in nuts 12 on each slide. The spindle is rotated by a handle 13. The slides have vertical guides 14 for guide pieces 15 carrying the pivoted support rollers 21 the guide pieces being adjusted for height by a pressure cylinder 17. The slides also carry vertical supporting rollers 22. The chassis 6 are moved along the guides 4 by a motor 25 coupled to the chassis by endless chains or cables 27 via a driving shaft 24. The chassis 6 are coupled to the chassis 5 running in the guide rails 3 by threaded spindles 29 adjustable in nuts 30. The chassis 5 have pivot levers 31 connected by a crosspiece 32 provided with a support roller 33 driven by a motor 34. The levers 31 are operated by pressure cylinders 35. A longitudinal guide 36 on the crosspiece 32 has a guide roller 37 which engages the edge of the blank and which can be adjusted to any inclination. In operation the middle of the blank is first pressed by the planishing tool and the blank is raised by the support rollers 21 off the lower tool 52. The frame is then moved by the motor 25 so that a peripheral area of the blank is positioned between the pressing tools and the blank is lowered onto the lower tool. After each pressing the blank is rotated step by step by the roller 33 until the entire peripheral area has been shaped. The height of the support rollers determines the curvature of the blank. In a modification the supporting rollers 22 have a flange which acts as a height guide for the blank. In another modification (Fig. 4) the pivot levers 31 are actuated by levers 42 pivotally mounted on support members 40 movable along a track 43 by threaded spindles 45 driven by a drive means 44. The levers 42 are operated by pressure cylinders 39. With this arrangement for every movement of the frame the levers 31 are automatically re-aligned.