GB266876A - A new or improved machine for the coiling or bending of metal strips on edge - Google Patents

Abstract

266,876. Line, A. J. Nov. 1, 1926. Curving; coiling. - A machine for bending or coiling L, T or other metal strip on edge consists of a pair of rolls rotating at different surface speeds, guides for supporting the strip before entering and after leaving the rolls and a shaping member disposed at the junction of the rolls. A strip 13 is passed between a pair of guide plates 6 through a pair of grooved rolls 3, 4 which, as shown, are of different diameters and mounted on shafts driven at the same speed or which may be of the same diameter and mounted on shafts rotating at different speeds. The strip engages a shaping member 9 pivotally mounted between a pair of guide plates 8, so as to bend it to the required radius. The member may be pivoted on a peg 10 and secured in position by pegs passing through one of a number of holes 12 or may be secured by bolts in grooves in the plates 8. The partly bent strip may be returned through the rolls to reduce the diameter of the bend, the rolls being reversed and a shaping member 14 provided. A series of such operations may be performed the shaping members being gradually brought closer to the rolls. The groove in the roll 4 may be slightly tapered so as to grip the strip. In forming a helix each turn as it leaves the machine lies close to the preceding turn or a guide member may be used to vary the pitch of the helix.