Patent GB-1047181-A (GB)
Title: Strip shear and welder assembly
IPC: B21C37/083
Filed: 1964-01-17
Abstract: 1,047,181. Making strip stock; welding by fusion. GUILD METAL JOINING EQUIPMENT CO. Jan. 17, 1964 [Aug. 2, 1963], No. 2221/64. Headings B3A and B3R. In a combination shear and end welder for metal strip stock means are provided to shift the position of the shear after severing one strip end to provide sheared strip ends spaced apart. A stand 1 supports at one end a fixed plate 6 and at the other end a plate 7 adjustably movable laterally between guides 8, 9, both plate 6 and plate 7 carrying roll stands 12, 13, self-centring guide roll units 20, 21 and strip clamp units 34, 35. The roll units 20, 21 comprise supports 26, 27, Fig. 2 (not shown), freely movable along guide rods 24, 25 and carrying strip edge guide rollers 28, 29. A well 45 between the plates 6, 7 has runners 46, 47 at the sides thereof supporting rollers 48, 49, 50, 51 on an index table 52 which is movable by a piston and cylinder assembly 54 and guided by alignment shafts 57, 58 extending through ball bushings 65, 66 on the table. A shear unit 70 and a weld unit 71 are mounted on the table 52 inclined slightly to the normal to the longitudinal axis of the strip, the shear unit comprising a vertically movable head 74 on posts 75, 76 such that when the posts move downwardly bringing the head downwardly a spring-loaded clamping plate 77 clamps the strip against platen 78 while the blade 79 continues downwardly to shear the strip. The weld unit 71 comprises a platen 80, strip end clamps 81, 82 and supported by brackets 83, 84 guide rods 85 on which runs a weld carriage 86 movable by a drive from a motor 87. The carriage supports a vertical torch 88 using a consumable electrode, a tungsten electrode or a tungsten electrode with a fed wire, the torch being mounted on a slide elevating automatically at the end of a weld traverse and a backing 90 is provided in the platen 80. Gap control devices 92, 93 provided at the left-hand side of the table 52 each comprise a gap block 95, Fig. 3 (not shown), fixed to the framework, a gap blade 98 having two portions 104, 105 of different thicknesses to be raised or lowered by a piston device 101 and an index block 96 secured to the table. A modified blade with more than two portions or an octagonal cylinder with different distances between its flats may replace the blade 98. In operation the trailing end of strip is clamped by clamp 34 with the end projecting through the shear unit 70, the table 52 is moved to the left with the blocks 96 engaging the thinner part 104 of the blade 98 and the shear is operated. The operation of the shear also operates a switch to cause the table to be moved a short distance to the right and to cause the blade 98 to be raised and the table is then retracted to the left against the thicker part 105 of the blade. The shear unit is now spaced to the right of the trimmed end of the trailing end. A new strip is fed into the machine from the right with the leading end projecting slightly through the shear unit and is clamped by clamp 35. The edges of the strips are brought into alignment and the shear unit trims the leading end. With the strips still clamped the table 52 is moved to bring the weld unit over the spaced sheared ends, the weld clamps 81, 82 are operated and the torch 88 is traversed across the ends, to produce a joint of substantially the same thickness as that of the parent material. A gauging blade of uniform thickness may be employed when the abutment of the blocks 96 and 95 determine the first position and abutment with the blade determines the second position. Reference has been directed by the Comptroller to Specification 783,231.