Patent GB-663056-A (GB)
Title: Improvements in or relating to coiling machines
IPC: B21C47/30
Filed: 1949-04-26
Abstract: 663,056. Rolling winding and reeling. DAVY & UNITED ENGINEERING CO., Ltd., and RUSSELL, R. G. April 26, 1949, No. 11056/49. Class 83 (iv). [Also in Group XXIX] In a machine, particularly for coiling strip material, as it leaves the rolling-mill, on a collapsible mandrel 102 a vertically-movable cradle 129 for supporting the coil and a stripper plate 142 movable relative to the cradle 129 in a direction parallel to the axis of the mandrel are mounted on a carriage 120 which is movable parallel with the axis of the mandrel to carry the coil away. The carriage 120 runs on tracks 123 under the action of a double-acting piston 167 and is made in the form of a tank to act as a sump for the discharge from hydraulic valves in the control system, the oil escaping to a settling tank through a slidable pipe 125. The cylinder 161 for the piston 167 has restriction passages 169, 173, for reducing the speed towards each end of the stroke. The stripper plate 142 is vertically slidable under the action of a doubleacting piston 145 to engage the coil 101 and is mounted in a second carriage 134 which is horizontally slidable on the first carriage 120 under the action of a piston 135. The cradle 129 is raised above the carriage 120 by a piston 132 which is capable of yielding if the winding of the coil continues, rollers 130 mounted at the top of the carriage engaging the under-face of coil 101 and permitting the winding of the latter to continue while engaged by the cradle. During winding the mandrel 102 is held in the expanded condition by means of a doubleacting piston 113 and toggles 107, 109, mounted in a box 106. The apparatus is operated in sequence through a system of manuallyoperated and automatic valves, the manual controls 179, 188, 199, being mounted on a tank 175 acting as a sump for hydraulic fluid. Part of the automatic control system is contained within the carriage 120, the valves on the carriage being actuated through the manual controls by hydraulic rams 246, 249, 252, 255, 258 and by one fixed stop 261, all mounted externally to the carriage, and engaging the valves on the carriage at one end or the other of its stroke. Hydraulic pressure-fluid is supplied to the carriage 120 from a chamber 165 in the actuating cylinder 161 through a passage 162 in the piston 167, the chamber 165 being permanently connected to the pressure supply. In operation, as the winding of the coil 101 nears completion momentary movement of the lever 188 to the right raises the stripper 142 and cradle 129 and locks them in position, a spring- loaded relief valve 222 permitting the piston 132 to be forced downwards as the winding proceeds to completion. Momentary movement of the lever 179 then moves the carriage 134 to the right by actuating piston 135 and locks it in position with the stripper 142 hard against the coil 101 which is still firmly held by the expanded mandrel 102. Operation of the lever 199 then releases the mandrel by operating the cylinder 115 after which the piston 167 in the cylinder 161 is automatically actuated to move the carriage 120 to the right, the operator releasing the lever 199 to re-expand the mandrel 102 as soon as the coil 101 is clear. On continued movement of the carriage 120 the carriage 134 is automatically returned to the left and movement of the lever 188 to the left by the operator then causes the stripper plate 141 and cradle 129 to be lowered and the piston 167 to move to the left returning the carriage 120 to the original position. Safety devices 137, 152, 154 are fitted which are operable by the stripper carriage 134 and the cradle 129 to prevent inadvertent movement of the carriages when the stripper plate and cradle are not correctly positioned. The hydraulic system may be replaced by an electrical system using limit switches and relays which control electric motors driving the carriages through worm gears and racks.