| 摘要 |
PURPOSE:To make a titled press have advantages of a hydraulic press and a machine press which are operated at a high speed and do not require a slide adjustment, by providing a hydraulic pressure type slide for moving forward and backward independently an inner ram and an outer ram so as to be opposed to a machine type slide. CONSTITUTION:A mechanical means 2, and slides 3, 4 which are moves up and down, respectively, by a hydraulic pressure are provided on the upper and lower parts of a frame 1. The means 2 has a driven gear 5 and a cam 6A, and by an up-and-down motion of an eccentric circular body 7 by rotation of a crank shaft 6, the slide 3 is moved up and down at a prescribed stroke. The slide 4 is constituted of a double coaxial ram of inner and outer rams 4A, 4B, and moved up and down at a variable stroke by the respective independent cylinders 8, 9. A punch 10, an inner punch 11A and a die 11B are installed to the lower face of the slide 3, and the rams 4A, 4B, respectively. When both the rams 4 are lowered about simultaneously, and the slide 3 is made to descend, the closed punches 10, 11A descend, the punch 11A sinks into a forging base material of the inside of the punch, closed forging is started, the slide reaches the botton dead center, starts its ascent, and one cycle is ended.
|
