| 摘要 |
968,420. Making beams; welding by fusion; straightening. PULLMAX A.B. March 22, 1962 [March 23, 1961], No. 11001/62. Headings B3A, B3E and B3R. In a machine for making beams consisting of web and flange plates fusion welded together, a flange-plate and a web plate are longitudinally fed through the machine under the guidance of rollers, and the joint between the web plate and the flange plate is welded at a position between two sets of rollers which press the flange plate against the web plate. Consumable electrode welding may be used. The welding may be carried out continuously while the plates are fed or intermittently during intervals when the plates are stationary. The web plate 1, Figs. 2 and 3, is fed between vertically adjustable rollers 4, 5, 6, 7 and the flange plates 2, 3 are supported on rollers 14, 15 and pressed against the web by driven rolls 16, 17 having inclined knurling which presses the flanges downwardly. Two complete sets of rolls are provided,the rolls 16, 17 being side-by-side and the rolls 4, 5, 6, 7 being staggered. The rolls serve to guide and straighten the plates 1, 2, 3. The rolls on one side of the beam are mounted on a fixed frame 20. The rolls on the other side of the machine are mounted on two slides 18 each of which is individually adjustable towards or away from the beam on guides on a frame 21 which is itself adjustable in the same direction. Welding is effected at a position between the inlet and outlet pairs of rolls 16, 17. In a modification, Figs. 4 and 5, for welding a T-beam, the flange plate 45 is supported on vertically adjustable rolls 71 and guided by rolls 68. The web plate 44 is pressed against the flange plate 45 by grooved rolls 54, 55 and is guided by adjustably mounted rolls 59, 60. The rolls 54, 55 are adjustable by rotation of threaded supporting columns 56 by a chain 58 driven by a motor 57. In order that after welding the beam shall be straight it is pro-stressed during welding by the upward pressure of a roller 89 mounted on a fluid pressure ram 52 and rotated by a motor to feed the beam through the machine. |
