Vorschub- bzw. Verschiebungseinrichtung (Translationsvorrichtung),insbesondere an Werkzeugmaschinen

摘要

1,159,381. Machine tools. NATIONAL RESEARCH DEVELOPMENT CORP. 12 Aug., 1966 [10 Aug., 1965], No. 34229/65. Headings B3B and B3T. A machine tool comprises, in a housing 11, a rotatable work-holder 18 which can be moved transversely and axially to engage the work with a tool in a holder. The chuck 18 is mounted eccentrically on a member (16) mounted eccentrically in an outer member 14 which is rotatable in the housing 11. A further housing 22 encloses the working chamber 21 and is formed with a land 24 on an end wall and a land 241 on the peripheral wall. The land 24 carries tool-holders 26, 27, 28, 25 carrying a drill, a boring tool and turning tools respectively. Land 241 is provided with two sets of three tools each, 37, 38. Work is fed in through an aperture 40. The member 16, Fig. 4, is fed axially by oil fed to ports 53 or 54 and slides in hydrostatic bearings 55. The oil is fed through a ball-joint 104 and telescopic pipes 103. The spindle 60 carrying the chuck 18 is rotated in hydrostatic bearings 651, 661 by twin swash-plate motors 61 driving through gears 62 and controlled by angularly adjustable port plates 731, 7311 and swash plates 811, 8111 controlled independently by hydraulic means. The member 16 is rotated within the member 14 by a ball motor 86 having an eccentric cam ring 84 splined to webs 81 on the member 16. A similar motor 110 and cam ring 111 rotate the member 14 relatively to the housing 11. Both motors are controlled by electrically operated valves 95, 117. All movement may be controlled manually, or by a computer for generating shapes and may be controlled in speed such as to provide a constant cutting speed. Air gauges may sense the size of the workpiece during machining and compensation made for wear. A further ball motor 120 may be provided to rotate the spindle 60 to a set position in addition to the swash plate motors for continuous rotation. In a modification, the machine tool is mounted in trunnions 150, Figs. 5 and 6, and has a free open end 153 so that, by positioning the tool vertically, swarf and cooling fluid may drop free on to a conveyer. Additionally, workpieces are fed by a conveyer 160 to a vibrating feeder 161 which delivers them automatically to the chuck. Finished workpieces pass from a shoot 162 back to the conveyer.