GB447333A - Improvements in or relating to apparatus for the manufacture of metal tubes and other tubular articles - Google Patents

Abstract

447,333. Making tubes &c. McLAY, G. S., Shell Mex House, Strand, and WELLMAN SEAVER ROLLING MILL CO., Ltd., Victoria Station House, both in London. Nov. 15, 1934, No. 32903. [Class 83 (iv)] Stamping; rolling. - After passing a tubular billet through dies or rolls the reduced tube 39 is automatically stripped from the mandrel 16 of a push bench by continuing the forward movement of the tube to actuate grip levers 5 and 6, which grip and hold the mandrel and to start the forward movement of a tube stripper. The tube in its forward movement swings upwards a hinged slotted gate 35 until it clears the trailing edge of the gate which swings back until its slot straddles the mandrel only, thereby operating a pawl 46, Fig. 7, on its hinge 36 to open air valves 48, which supplies fluid both to the cylinder 15 of the mandrel grippers, and to the cylinder 42, Fig. 1, of the stripper carriage 18. The carriage 18 then moves to the right, the slot of the stripped plate 35 backed by the plate 27 of the carriage, engaging the tube end and stripping it off the mandrel. The tube is received on supports 29 which are pivoted up to discharge sideways the tube when a roller 32 engages a fixed cam 33 on the end of the bed. The carriage, at the end of its forward movement, operates a pull rod 49, Fig. 7, to exhaust cylinders 15 and 42 so that the mandrel is released from its grippers 5, 6, and rolls down the slope of its supports and the carriage is traversed back to the left. The mandrel supports 43 are swung aside by the backward movement of the carriage but are swung out again to mandrel supporting position by weight 45 when free to do so, as the carriage advances again. Specifications 300,288, [Class 83 (iv)], and 446,099 are referred to.