GB303600A - Improvements in folding or angle bending machines for working sheet metal and the like - Google Patents

Abstract

303,600. Kinghorn & Co., Ltd., A., Walker, W., and King, J. Nov. 8, 1927. Angular bending. - In folding or bending metal to form trays, Fig. 6, or flanged stove linings, rectangular pipes &c. by a machine of the type comprising a bar g which is swung upward by hand lever g<6> to bend the metal against a folding beam d the beam d is composed of a number of detachable sections e<4> with spacings in between to acommodate the two already bent up sides of a tray while the third and fourth sides are being bent up in turn. The sections e' may be held to the beam by bolts, or, to allow quick interchangeability, by security bolts f<1> screwing into a clamping bar f, the section being stepped, Fig. 3, to fit on steps on the clamping bar. The crossbar is secured to the machine by vertical spindles d<1>, Fig. 2, and when a spindle is lowered the beam d can be swung out horizontally at one end for removal &c. of the desired sections or to take off a bent square tube. The folding bar m is in two parts vertically adjustable for height as described in Specification 303,677. Feelers p<*> are provided carried by the adjustable member p' the feelers being in the form of thin blades arranged nn edge as described in Specification 8132/05 lying in front of the nose of the cross beam when the metal to be folded requires to be inserted from the back of the machine and which are retracted by treadle q* to lie below the beam when the metal is inserted from the front of the machine. The swing bar g is provided with stub axles g<1> with bosses comprising cast iron integral collar k and a hardened steel ring keyed thereon, the bosses resting on rollers j. A counterweight g<5> is connected to the stub axle g' and abuts against a stop block adjustably mounted in the slotted quadrant r<1> to allow the required amount of bending.