| 摘要 |
959,269. Milling. F. K. KOCH, [trading as PELTZER & EHLERS MASCHINENFABRIK]. April 11, 1963 [June 12, 1962], No. 14693/63. Heading B3K. A device for shaping the ends of bolts 33 comprises a shaft 2, with lower and upper portions 2a and 2b respectively, secured to the frame 1 of a milling machine. A tool support 4 rotatably driven by a motor 6 and gear 7 carries a cutter 5 and is mounted on shaft portion 2a with which it rotates. The upper shaft portion 2b is provided with a long boss 11 incorporating a driving flange 12 and is secured axially to the shaft by a circlip 13 and collar 14. An axially movable rotary table 15 is secured to the boss 11 by a key 16 and is surrounded by a housing 17 attached to the frame 1. The table 15 is rotated by a motor 22 through a worm 23 and worm gear 24 and has an annular slot 25a through which a stationary ring gear 25 passes. Pinions 26 on spindles 27 rotatably located in sleeves 30 in the table 15 mesh with the ring gear 25. Each spindle has a bolt receiving head 28 with a recess 28a corresponding to the shape of the head of the bolt 33. The axes of the spindles 27 are parallel to the axis of the cutter 5 and the spindles are axially displaceable in the table 15 by means of feed cams 41 and a restoring cam 42 which co-operate with rollers 38 and 40 respectively, on the spindle ends, and in conjunction with springs 24. In operation, the bolts 33 in the receiving heads 28 rotate with the spindles and are moved axially into engagement with the cutter 5 under the action of feed cam 41 due to the rotation of the table 15. The screw receiving heads are then returned to their initial positions by the restoring cam 42. The finished bolts are subsequently ejected from the receiving head by a spring-loaded stud 43. Other embodiments described include alternative arrangements of the receiving head suitable for socket-headed screws and a collet-type device for holding roundhead screws or bolts. Also, an embodiment of the device is described wherein the axes of the spindles and viewing heads are positioned radially at right angles to the axis of the cutter. |
