| 摘要 |
1,193,387. Copy-turning. J. L. JEANNERET. 10 July, 1968 [12 July, 1967], No. 32896/68. Heading B3T. A copying lathe has a first copying slide 7 mounted at an angle to the workpiece axis 4 and arranged to move under the control of a feeler 8 of e.g. an hydraulic copying control device, and a second slide 12 driven from the first so as to make movements which are a mirror image across the workpiece axis of those of the first slide 7, a release device being provided whereby the second slide can be retracted from its working position. Both slides are mounted on a longitudinally movable carriage 5 and drive from the first to the second slide is effected by means of a shaft or rod.20 and steel band 26 attached thereto and to the slide 12. Alternatively the shaft 20 may co-operate with a rocker arm (Figs. 2, 9, not shown). The slide 12 is urged in a direction to keep the band 26 taut by a fluid pressurized cylinder 30 and piston 32. The tool 16 of the second slide 12 is carried by a toolholder 17 on a carriage 50 the latter being movable in a direction normal to the workpiece axis on ways 51 by a fluid operated cylinder unit 52. This radial movement effected by the unit 52 is accompanied by slight longitudinal movement as a roller 64 mounts a stepped portion 62 on the toolholder 17 which is slidable against the pressure of a spring 65 on ways 61. Micrometer screw heads 58, 72 serve to adjust finely the position of the tool 16 in the radial and longitudinal directions. In alternative embodiments the stepped portion 62 is replaced by an inclined portion (73), (Fig. 4, not shown) or (Figs. 9, 10, not shown) the ways (51) on which the carriage (50) is mounted are slightly inclined to the perpendicular to the workpiece axis so as to combine the radial and longitudinal retractive motions of the tool 16. Both tools 10 and 16 may be used simultaneously in which case the cut may be divided between the tools either radially, i.e. as regards depth of cut or in the axial direction. Alternatively the slides 7, 12 may carry respectively a roughing and finishing tool, the slide release device being utilized for slide 12 so that initially only the roughing tool is used and thereafter the finishing tool. |
