| 摘要 |
971,319. Gear - finishing. NATIONAL BROACH & MACHINE CO. March 20, 1963 [April 12, 1962], No. 10985/63. Heading B3B, B3K and B3T. A gear-finishing machine comprises a rotary work support 20, Figs. 3 and 4, reciprocable horizontally in any direction, a cutter slide 56 movable vertically on a column, the axes of the work and cutter being horizontal, and means 26 for effecting vertical feed of the cutter. The table 20 can be rocked for crowning a gear and is adjustable angularly on slides which can be adjusted to set the direction of traverse whilst maintaining the set crossed-axes angle. A cutter feed motor 28, Figs. 4 and 21A, driving a screw 290 engaging the nut 26, and a cutterrotating motor 40 are both mounted in the column, which has two legs 61, 62 to allow work transfer means to pass through. A drive transfer box 50 supported by and partly within the column projects into the slide. The box 50 contains gearing 558 interconnecting a shaft 534 (position 48, Fig. 4) driven by the motor 40, with a splined shaft 334 (position 54, Fig. 4) driving the cutter 58, and gearing 552 interconnecting a shaft 436 (36), driven by the motor 28 with a shaft 308 (52) driving the screw 290. The cutter-drive includes change-speed gears controlled by hand-knobs. The screw 290 (Fig. 9) is coaxial with a gear 342 in the cutter drive and with a recess 348 in the slide which receives the angularly adjustable cutter head 56, Fig. 23. The head is adjusted angularly by a manually-rotatable worm engaging a worm-wheel 364. The cutter-spindle 570 is, supported by an outboard-bearing 598. The motor 28 drives the screw through an hydraulically-operated clutch 406 which controls the feed-speed by selecting the drive through wormgearing 392 and 400. The gearing also rotates a control disc 38, Fig. 12, having dogs to actuate switches 460, 462, 464, 466 which control withdrawal of the cutter slide, fast feed, incremental feed and dwell, the latter being achieved by a simultaneous switching-off and braking of the motor. After several strokes of the work with in-feed, a finishing stroke may be made without additional feed. |
