GB763220A - Improvements in or relating to a three-dimension contour producing machine - Google Patents

Abstract

763,220. Copy-milling. CINCINNATI MILLING MACHINE CO. April 21, 1954 [July 9, 1953], No. 11476/54. Class 83 (3). A three - dimensional copying - machine comoruses a tool 25 movably supported on a cross-slide 18 on a main slide 12 of the machine, a first tracermechanism 66, 75 carried by the bed and co-operating with a pattern 76 on a support 100 carried by the cross-slide, and a second tracer-mechanism 37 on the cross-slide cooperating with a second pattern on a support 53 mounted on the bed, one of the tracer-mechanisms 66, controlling the movement of the two slides and the other, 37, the position of the tool on the cross-slide. The cross-slide 18 carrying the motor 26 driving the milling- cutter 25 is moved by a hydraulic ram 20 on the main slide 12 moved by a hydraulic-ram 14. The depth-control tracer 39 is mounted on a slide 33 moved on the slide 18 by a hydraulicpiston 30 in a cylinder 29. An arm 34 on the slide 33 moves the cutter 25 in unison with the tracer. The tracer 39 is adjustable horizontally by a.slide 35 and a transverse slide 36. Movement of the tracer 39 according to the pattern on the fixed support 53 admits pressure to the cylinder 29, to raise or lower the tracer and cutter. A cam, operated by a piston formed with rack-teeth and moved by hand or by pressure in a line 62 under the control of the profiletracer, may override the tracer 39 to raise the cutter-and-tracer slide 33. The profile-tracer 75 and associated mechanism is mounted on the bed 10 and is of the type described in Specification 763,219, except that excessive upward movement of the tracer controls an auxiliary valve to raise the slide 33 as referred to above. The deflections of the tracer 75 control the movements of the pistons 14, 20 of the main slide 12 and cross-slide 18, by way of adjacent parallel control valves. The work 86 is a rotor having nozzles 89 to be machined, the nozzles being of oval shape with raised rear lips. The rotor is positioned by a forked-rod 92, advanced by rack-and-pinion gearing by a hand wheel 97 to embrace a nozzle. The pattern 76, secured on the arm 100 by a clamp 102 gives the oval outline shape of a nozzle and the other pattern gives the lip shape. A hand-control-wheel 103 brings the pattern 76 and tracer 75 into contact. The machine has start, stop, spindlecontrol, and rate-controlling buttons 105 to 108. Specification 578,883 also is referred to.