GB759096A - Heading machines - Google Patents

Abstract

759,096. Forging screws and rivets; shearing. ALEXANDER MACHINERY, Ltd., G. H. Feb. 2, 1955 [June 23, 1954], No. 18381/54. Class 83 (4). A heading machine for making screws, rivets or the like comprises a horizontal slider a actuated through a connecting rod d by a crank b and supporting a transversely slidable tool carrier e carrying a roller m engaging in a longitudinal channel k in an actuating member i horizontally slidable along guide rods hand actuated by a rotary cam n. The cam is driven from the crank-shaft by toothed gearing and has a helical groove in which is engaged a roller o connected to the actuating member i. Springs 18 cushion the movement of the actuating member i, and the sliding movement of the tool carrier is limited by adjustable stops 17, Fig. 3. Wire stock r to be headed is fed through a guide q, Fig. 4, and against a stop 15 by a pair of feed rollers 14, Fig. 1 (not shown). The projecting stock is then severed by a blade t, Figs. 3, 4, mounted on a horizontal slide u carrying a roller w engaging in the cam groove of a cam v. The blade t has a recess for receiving the cut-off length of wire stock and the latter is held in the recess by a spring-loaded gripper x whilst the wire is transferred to the heading die s, Fig. 4. The wire is pushed into the die by a first heading tool f, mounted on the tool carrier e, and a preliminary head is formed thereon. The tool carrier is then moved to the right and a final heading tool g is positioned and actuated to form the finished head on a rivet or the like 19. The latter is ejected from the die s by a spring- loaded ejector rod 3 actuated through a lever 7, thrust member 8, and follower 10, Fig. 2, by a rotary cam 11. When the blade x has been retracted for the next severing operation, the gripper x is raised by engaging an adjustable screw 2, Fig. 3.