GB582869A - Improvements in profile cutting machines - Google Patents

Abstract

582,869. Copying by milling ; dividing by fusion. RAYLOR, W., and RAYLOR, J. W. Sept. 19, 1944, No. 17899. [Classes 83 (iii) and 83 (iv)] In a machine for cutting the ends of bars or tubes to fit against other bars &c. at an angle, the bar and a pattern 27 are mounted respectively in the rotatable spindles of headstocks 8, 9 and the cutting tool is mounted in a bracket 1 on a .slide 5 carrying a follower 28 which is maintained in contact with the pattern by a weight 29 and cable 30 passing over a pulley 31. The headstock spindles are rotated simultaneously by worms 11, 12 on a shaft 13 driven by worm gearing 14 from an electric motor 20. The speed of rotation of the spindles is varied in accordance with the shape of the pattern, to maintain a constant cutting speed, by means of a belt drive between the motor and shaft 13 comprising opposed cones 16, 18 and a belt 17 which may be moved along the cones by a belt shifter 21 adjusted by a screw and hand wheel 22. Alternatively, the belt shifter may be connected by a lever 23, pivoted at 24, and a link 26 to the slide 5 so as to vary the speed of rotation automatically in accordance with the position of the slide. A stop 32 is adjustable along a guide 33 and may be swung into line with the headstock 8 to position the work axially therein. The cutter may be an oxyacetylene or like flame cutter or a milling' cutter driven by a separate electric motor.