| 摘要 |
1287531 Rolling gear-wheels CARL HURTH MASCHINENUND ZAHNRADFABRIK 7 Jan 1971 [24 Jan 1970] 805/71 Heading B3M In a method of reducing the loading on the tool supports during chipless forming a gearwheel 38 by rotating a gear-shaped tool 12 in mesh therewith, the tool and gear axes are offset relative to each other in the feed direction. At the maximum feed position a plane 27 normal to the feed direction and a plane 41 containing the tool and gear axes include an acute angle α. The angle a should preferably be greater than 15 degrees but less than 20 degrees. The workpiece is fed in the direction of the arrow 40 either by a screw drive or by a fluid pressure operated feed (41), (43), Fig. 2 (not shown). The workpiece 38 is mounted on an arbor 52 in abutment with a shoulder 53 so that when rolling helical gears axial thrust is transmitted to an end stop 62. The arbour is journalled on rollers 47a, 48a, 47b, 48b, which are mounted on shafts journalled in supports 46, 46a. The shafts are axially adjustable to allow for workpieces of different widths. |
