| 摘要 |
355,245. Lathes. MAGDEBURGER WERKZEUGMASCHINENFABRIK AKT.- GES., Schwiesaustrasse, and MÍBIUS, W., 2, Schwiesaustrasse, both in Magdeburg, Germany. May 19, 1930, No. 15301. Convention date, April 24. [Class 83 (iii).] The control elements for the slides of a lathe or like machine tool are mounted in fixed positions in the bed of the machine, connection between the fixed and movable parts being effected by bevel gears mounted on oscillatable shafts. The drive for the slides may be taken from slow or highspeed shafts 6 and 7 respectively, the former driving through a wheel block 46, 47, selectively operated by dive keys, and thence through reversing gear and clutches 54, 55, Fig. 4, to spur wheels 13 and 23. The turret head 3 is longitudinally or transversely operated by a handle 15 which shifts the wheel 13 to drive either the pinion 10 engaging a rack on the slide, or a transverse shaft 16 connected to a screw 18; longitudinal movement of the drill turret is obtained by a fixed pinion 23, driven from the clutch 55, engaging a rack 24 fixed to the slide. The high-speed drive for the slides from the shaft 7 is obtained by movement of levers 22 and 30 controlling clutches and reversing gears 20 and 28 respectively. Operation of the lever 30 to effect rapid movement of the drill turret away from the headstock, Fig. 5, rotates by means of segments 31 and rod 32, a cam block 35, mounted on trunnions 34, into such position that when the turret slide reaches the end of its travel a roller 62, Fig. 5, engages the cam block and rotates the lever 39 in the direction B ; this action releases a brake 38, disengages an index pin 42 for the turret through the arm 40 striking a rod 41, and in turn sets in motion the drill turret by engaging the clutch 43. Movement of the drill turret away from the headstock is arrested by an abutment 61 on the slide striking a roller 60 on the cam block, Fig. 6, thus disengaging the clutch 59 ; rotation of the turret, however, continues until the index pin springs into its next stop position and disengages the clutch 43, bringing to rest also, the stop bar 45, at the same time an abutment 64a is released from a tongue 64, Fig. 5, which prevented the clutch 59 from being engaged for the reverse travel, on the clutch being thus engaged the turret moves towards the headstock and a roller 63 moves over the cam block, Fig. 12, (not shown), to again apply the turret brake 38. |
