GB562446A - Machine for bending sheet metal - Google Patents

Abstract

562,446. Angular bending. PLATTS, R. March 16, 1943, No. 4241. [Class 83 (iv)] A bending-machine comprises two main rollers A, B, one above the other, running in 'bearings supported in end frames 1, 2, Figs. 3, 4, and a roller K supported by arms J, pivoted on the axle of the roller B, which are moved by detachable cams I to vary the curvature of the metal sheet. The cams are driven through adjustable gearing 3, 4 from the main rollers. If the sheet is to be bent laterally as well as longitudinally, the rollers are curved and the main rollers may be in separate segments A, A<1>, A<2>, B, B<1>, B<2>, pressed together by springs A<3>, B<3> to allow relative rotation. If this is not desired, the segments may be fixed relatively by pegs A<5> in sockets therein. The parts A<1>, A<2> or B<1>, B<2> may be mounted to rotate on spindles 6 of the part A or B and these spindles 6 may extend into and be removably secured to sockets C which carry the gears E, 3, &c. and the bearings so that by separating the frames 1, 2 the rollers A, B may be replaced by others of different size and shape. A shaped plate R may be arranged between the rollers K and B about the axis of which the arms J turn, this plate also being carried by said arms and both being connected thereto by ball joints if desired to allow of the arms being raised by different amounts. The effect of the cams can be varied by arranging, between them and the corresponding arms J, lovers L, Fig. 1, the pivots 5 of which can be moved through an arc by means of a lever M and handle P. The bearings of the roller B rest on cylindrical pins P, Fig. 3, each having a flat side so that they can be lowered, for insertion of work between the rollers, by rotating said pins. The arms J have enlargements J<1>, Fig. 1, which, when the arms are moved up, engage fixed rollers N and increase the grip of the rolls A, B.