| 摘要 |
843,442. Copy-milling. DE SPA. & FILS, SOC. EN COMMANDITE PAR ACTIONS. June 25, 1956 [June 24, 1955], No. 19608/56. Class 83 (3). A machine for milling the bearing- surfaces of card flats 4, comprises a work-head 6 pivoted on a driving-shaft 7 which rocks the head through the intermediary of a clutch 34, 35, a clamp 5 for the card flat, and a camfollower 8 both on the head, the follower following a cam 9 to displace vertically the head and shaft 7 as these rock to feed the card flat past the cutter 1, and the clutch being disengaged at the end of the feed-stroke and the work removed before the head, is swung manually back to the starting- position. The shaft 7, in a sleevebearing 41 attached at one end to a gear-box 45, is guided for vertical movement in the machineframe 3 by slideways 68 engaged by a flange 43 on the bearing 41. The cutter-shaft 2 and a worm-shaft 57, which is slidable with the gearbox 45, are driven from a motor through beltgearing 53, 56, the worm-shaft driving the shaft 7 through two worm-gears 58, 59, 61, 62. A clamp 5 of the kind described in Specification 812,693 is carried at the top of the head 6, and the follower is supported by a bar 25 adjustable in the head by a screw 27 co-operating with a detent 26 engaging a notch in the bar. Nuts 29 secure the bar after adjustment, and furtheradjustment may be effected by changing the cam 9. Part 34 of the clutch is integral with the head and is engaged with the other part 35 of the clutch by turning a handle 37. A microswitch (not shown), operated by the flat, stops the driving-motor at the end of the operative swing of the head 6. |
