| 摘要 |
The invention relates to extrusion and pipe presses (1), comprising a press frame consisting of a cylindrical spar (2) and a counter spar (4) connected thereto, in which a mobile billet container holder (7) supporting a billet container (8), which puts a billet (18) to be pressed, which was introduced by a loading device, into a press position in front of the counter spar (4) with the associated tool (38), and a mobile punch crosshead (6) are provided. In the cylindrical spar (2), a main cylinder, or press cylinder, is arranged, which in the cylinder housing (9) thereof receives a press piston (11), which at the front end thereof that is supported by the punch crosshead (6) is connected to a press punch (19). A compensation tank (15), which delivers hydraulic oil to the press piston (11) by way of a slider plate (28), is assigned to a main cylinder housing (9) connected to a tank line. With an extrusion press such as this, the considerable hydraulic expenditure, and in particular the non-productive time, are to be substantially reduced, while making the structural design more compact and simple at the same time. To accomplish this, the advancing and feed motions of the billet container holder (7) and punch crosshead (6) with press piston (11) are carried out by electromotive force, and both the precompression of the billet (18) loaded into the billet container (8) and the subsequent compression of the billet (18) are done by hydraulic loading of the press piston (11). Electric motors (12, 13) are assigned to the punch crosshead (6) and the billet container holder (7) as adjustment drives. A large-scale filling valve (20) is integrated in the cylinder housing (9) of the main cylinder for loading the press piston (11). |
| 主权项 |
1. A method of making metallic extrusions with an extrusion/tube press comprising a press frame consisting of a cylinder housing and a counter housing connected thereto, a mobile billet support therein supporting a billet holder that sets a billet to be pressed, which was introduced by a loader, into a press position in front of the counter housing with a tool, and a mobile punch crosshead, a main or press cylinder being provided in the cylinder housing and holding at a front end a press piston that is supported by the punch crosshead connected to a press punch, and a compensation tank that supplies hydraulic fluid to the press piston by the slide plate being provided for a main cylinder connected to a reservoir line, characterized in that the traveling and supply movements of the billet support and the punch crosshead with the press piston are achieved by electromotive means, and in that the precompression of the billet that is loaded in the billet holder as well as the subsequent pressing action of the billet are achieved by applying a force hydraulically to the press piston. |
