| 摘要 |
1,248,740. Rolling; forging. SCHLOEMANN A.G. 30 Dec., 1968 [27 Dec., 1967; 2 Jan., 1968; 7 Aug., 1968; 28 Nov., 1968], No. 61785/68. Headings B3H and B3M. A device for forming workable materials comprises at least one pair of eccentrically mounted tool rings 4 whose peripheries move toward and away from each other during operation to form the material between them, means for driving each tool ring, a gear 7 associated with each tool ring, an eccentrically mounted second gear 8 having an eccentric centre point different from that of the tool ring and meshing with the first gear and a control means 5 for controlling the movement of the second gear, the number of teeth on the second and first gears being such that on each approach of the tool rings toward each other a different part of the periphery is used for forming. Each tool ring is preferably mounted on a shaft 1 which also carries an eccentric bearing 16 for the second gear. The control means is preferably a lever 5 mounted on a rocker 6 which is mounted in a stand frame at a point F. By adjusting the point F the speed at which the periphery moves relative to the gap between the tool rings during a forming stroke can be altered. Two pairs of tool rings working interdigitally and normal to each other may be used, Fig. 7 (not shown), and are preferably driven from a common drive. The tool rings may be rolls or can carry forming tools, Fig. 11, which engage the work 19 in successive strokes of the device. When two pairs of tool rings are used it is preferable for only one pair to impart thrust to feed the work, the other pair only performing the forming operation. In an alternative embodiment the tool ring has an internal gear which is linked to a stationary eccentrically mounted sun gear (14) by a movable planet gear (16) linked to the sun gear by a lever (15), Fig. 10 (not shown). |
