GB1202031A - Improved machine for straightening or bending elongated stock - Google Patents

Abstract

1,202,031. Straightening or bending elongated stock. SCAFFOLDING (GREAT BRITAIN) Ltd. 15 Aug., 1968 [15 Aug., 1967], Nc. 37463/67. Heading B3E. A machine for straightening or bending elongated stock such as tubes, rods or bars comprises a rectangular supporting frame with sides 10, 11, 12 and 13 in which is mounted a power unit 22 which drives a shaft 23; a first anvil having a fixed mounting 39; a pair of connecting-rods 25 connected at their one pair of ends to the shaft 23 so as to be reciprocated towards and away from the first anvil; a second anvil 31 connected at the other pair of ends of the connecting-rods 25; the first and second anvils having dies 33 and 49 arranged to engage a length of stock 35 placed therebetween at three positions, of which two are spaced apart on one side of the stock and the other is located between the two positions on the other side of the stock, and a pair of tiebar members 56 connected at one pair of ends to the fixed mounting 39 of the first anvil and at the other pair of ends to a fixed housing 21 around the shaft 23. The second anvil comprises a plate 27 fixed to the free ends of the connecting-rods 25 with a pair of spaced-apart downwardly-extending legs 26 which are pivotally mounted at their lower ends about a common horizontal axis so that the reciprocation of the connecting-rods 25 produce a pivotal back- and-forth movement of the die 33. The first anvil comprises a beam 46 having at each side a downwardly-extending bar 47 which is pivotally connected at its lower end by a pair of straps 48 about the pivot part 37. Two dies 49 are mounted on the first anvil at spaced-apart positions and are adjustable along the length of the anvil while the third die 33 is mounted on the second anvil between the other two dies. The fixed mounting 39 of the first anvil has two spaced-apart tubular housings 40 in each of which is a support member 41 comprising a screw-and-nut mechanism which engages and supports the first anvil. The support members 41 are adjustable in unison by use of a hand wheel 42 and sprockets 43 and 45 with an endless chain 44 to rotate the screw-and-nut mechanism.