GB906966A - Improvements in and relating to single-spindle automatic chuck lathes - Google Patents

Abstract

906,966. Turret lathes. WERKZEUGMASCHINEN - FABRIK GILDEMEISTER & CO. A.G. July 12, 1960 [July 14, 1959; July 18, 1959], No. 24302/60. Class 83 (3) A single-spindle automatic lathe comprises a polygonal tool-turret 5 which is longitudinally movable and a cross slide 35<SP>1</SP> movable by electro-mechanical means controlled by cams 26<SP>1</SP>, 27<SP>1</SP>, 28<SP>1</SP> adjustably mounted on a drum movable with the turret. The turret shaft 7 can be traversed by a screw 11 engaging a nut 10 and rotated by a fast motor 38 or an adjustable feed motor 37<SP>1</SP>, the feed speed being regulated by a potentiometer. The turret is indexed by a motor 15 rotating a Maltese cross great 18 and gearing 19-22. A disc 6 on the turret, in its travel, engages an adjustable member 14 to prevent rotation. A 90-degree rotation of the Maltese cross advances the pentagonal turret by 72 degrees. A shaft 25 is rotated by chain gearing 44 from the shaft 7 and carries fixed drums 26, 27 and a longitudinally-fast, but rotary, drum 28. The axial movements of the shaft 7 are transmitted to the shaft 25 by an arm 29 held against the disc 6 by a spring 31. The drum 28 carries dogs to start the motor 38, to control the speed of the feed motor 37<SP>1</SP>, and to control the speed and direction of rotation of the spindle 2 via gear-box 3: the drum 26 carries the dogs 261 to control the feed motor 37<SP>1</SP>: and the drum 27 carries the dogs 27<SP>1</SP> to stop the feed movements and cause a high-speed return movement, which movement is stopped by an adjustable switch 33 actuated by the disc 6. Two cross-slides 35<SP>1</SP>, 35<SP>11</SP> are driven by highspeed motors 38 and feed motors 37, which may be controlled by dogs on the drums 26 or 28 and by cams 40, 41. Push button operation may also be provided.