Patent GB-533608-A (GB)
Title: Improvements in or relating to apparatus for treating the edges of sheet metal
IPC: B23D1/26
Filed: 1939-10-25
Abstract: 533,608. Rolling; broaching. STEVENS, A. H. (Yoder Co.). Oct. 25, 1939, No. 28658. [Classes 83 (iii) and 83 (iv)] A machine for treating the edges of sheet metal comprises a support on which the sheet is fed and removable spaced edge-engaging devices arranged to upset or plane off the edges of the sheet. The base carries standards 2, 3, Fig. 1, provided with bearing boxes 4 for front and rear pairs of feed rolls 5, 6 for feeding a pair of webs or sheets A. The feed rolls are driven from a motor 16 through belt gearing 13, shaft 12, gearing 11, and universal shafts 8. A feed table 19 supported by a standard 18 has adjustable side guides 20 and adjustable rollers 23 for each sheet. Front and rear supporting members 26, 26a bolted to brackets 27a on the standards support carriers 30, each provided with a pair of edging rolls 31 engaging opposite sides of the web. Each carrier comprises end housings 32 connected by bolts 33, 33a having nuts 34 which may be adjusted according to the desired spacing of the edging members. Each housing has upper and lower bearings for the edging roll 31, each of which has a number of spaced grooves 47 of different cross sections, any of such grooves being brought into co-operation with the sheet by vertical adjustment of the edging roll. For this purpose the roll has a number of grooves 45 spaced similarly to the grooves 47 and coacting with an adjusting screw 44. A head portion 31a is provided on each edging roll for adjustment or removal. The support members 26, 26a are provided with tracks engaged by rolls 50a. Each housing carries a bracket fitted with an arm 56 which extends over the upper feed roll and is fitted with plates which form a throat which serves as a guide for the sheet. Within the housings the sheet is fed between interchangeable shoes 62 which support the sheet at its end portion and prevent buckling due to pressure of the edging rolls. Each carrier unit consisting of a pair of housings and edging rolls is free to move laterally in either direction so that any curvature in the sheet may be accommodated. In a modification, Fig. 7, planing cutters are employed instead of upsetting rolls. The feed rolls 105, 106 are driven through gearing 107, chain 108, and reduction gearing 110a from a motor 111. The cutter frame 112 is mounted to float laterally of the sheet A on rollers 115, Fig. 8, while other rollers 117a prevent longitudinal movement of the cutter frame. The frame carries a pair of removable cutter assemblies 118 that are connected together for floating movement laterally of the sheet A. The spacing between the cutters is determined by skims 119 interposed between shoulders on the frame 112 and wedge securing devices 120. The frame 112 has integral bridge members 121 and the support 118 is secured against one end of the bridge member by a wedge 122. By removing the wedges, the members 118 may be quickly removed. The cutters are mounted in blocks 123 having recesses to receive cutters 112<SP>1</SP> which are individually adjusted by abutment screws, The cutters are secured by screw and wedge devices and are set so that each takes a slightly deeper cut than the preceding cutter. Rollers 128, 128a engage the edges of the sheet to cause the cutter frames to follow any curvature of the sheet. The sheet is prevented from buckling by a series of rollers 138, 139 arranged on parallel shafts 138a, 139a.