GB793199A - Improvements in or relating to cutting machines - Google Patents

Abstract

793,199. Cutting by fusion. BRITISH OXYGEN CO., Ltd. Aug. 30, 1956 [Aug. 31, 1955], No. 25039/55. Class 83 (4). A cutting machine, particularly a flamecutting machine, has a first cutting head 5 movable under the control of a template 6 and a second cutting head 13 movable in a linear path, the movement of the first cutting head being resolved into two mutually perpendicular directions one of which is parallel to the linear path of the second cutting head, and means are provided for varying the speed of the second cutting head in dependence upon the second component of resolution. The template 6, which may be of magnetic material, is disposed between two rails 2 along which run carriages 3 connected by a transverse beam 1. A boom 4 movable lengthwise of the beam 1, carries the cutting head 5 and a tracing head 7 which may be a magnetized follower wheel driven by a motor. An endless chain or cable 16 passing around spaced jockey pulleys 15 on the beam is connected at 17 to the boom 4 and drives a pulley 18 mounted on a bracket 19 adjustably clamped to the beam 1. Pulley 18 carries a pinion 20 meshing with a rack on a slider 14 carrying the second cutting-head 13 and movable parallel with the rails 3. Thus, transverse movement of beam 17 drives chain 16, pulley 18 and pinion 20 which thus moves the slider 14 longitudinally. Pulley 18 may be stepped for varying the speed relationship. The beam 1 is preferably extended beyond the left rail 2 and carries a second set of cutting heads whereby two plates 10 may be cut simultaneously. Alternatively the first and second cutting heads may be interconnected for corresponding movement by two perpendicular racks meshing with a single pinion. The second cutting head may move along a bar such as 14 fixed to the beam 1.