| 摘要 |
The invention pertains to a double press for forging round or edged bar-shaped workpieces using two presses set at 90 DEG to each other, each having a pair of forging tools (A1, A2, B1, B2) that hydraulically work against each other, alternatingly driven by pump assemblies (5, 6), with pairs I and II of the forging tools being driven alternatingly and each of the pump assemblies (5, 6) being connected on its delivery side to a piston-cylinder unit (1, 3) of a forging tool (A1, A2) of the one pair I and on its suction side to a piston-cylinder unit (2, 4) of a forging tool (B1, B2) of the other pair II, and with the main lines (21, 22, 23, 24) between the pump assemblies (5, 6) and the piston-cylinder units (1, 2, 3, 4) being free of valves. The delivery direction of the pump assemblies (5, 6) is reversible, so that the pumps' delivery and suction sides change with a reversal of the delivery direction. |
