Bar press with hydraulic drive

Abstract

A bar and tube extruding press for thrilling metal ingots into profiles, tubes, bars or the like includes a male die and a female die, through which a metal ingot can be pressed by the male die a container, and a driving device, in which the driving device has at least one main cylinder tor applying the main pressing force of the male die to the metal ingots, characterized in that on the one hand the driving device having at least one speed-controlled internal gear pump for providing the hydraulic oil to the at least one main cylinder, with which the at least one main cylinder can be driven, and at least one hydraulic advance and / or return cylinder for moving the male die in relation to the female die or at least one electrical drive for moving the male die in relation to the female die and with which the male die can be moved into a position in which the speed-controlled internal gear pump only then interacts with the at least one main cylinder in such a way that the main pressing force is applied to the male die by the at least one main cylinder.

Description

RELATED APPLICATIONS[0001]This application is a continuation-in-part application of U.S. application Ser. No. 16 / 559,178 filed Sep. 3, 2019 which is a continuation application of U.S. application Ser. No. 15 / 311,894 filed Nov. 17, 2016 which is a National Stage application of International Application PCT / EP2015 / 061270 filed May 21, 2015 and which claims priority of German application DE 10 2014 209 685.5 filed May 21, 2014, all of the applications are incorporated herein by reference thereto.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The invention relates to a bar and tube extruding press for forming metal ingots into profiles, tubes, billets, or the like, comprising a male die and a female die, through which a metal ingot can be pressed by means of the male die, comprising a ingot container, and comprising a driving device, in which the driving device comprises at least one main cylinder for applying the main pressing force of the male die to the metal ingots.2. Pri...

AI Technical Summary

Benefits of technology

[0011]Such a design of the driving device of the bar and tube extruding press makes it possible to use standard electrical motors with higher mass moments of inertia in combination with smaller dimensioned frequency converters for operating the speed-controlled internal gear pump(s).

[0053]It should be noted here once again that the drive concept can be implemented at significantly lower noise in the present bar and tube extruding press by using an internal gear pump rather than an external gear pump.

Problems solved by technology

But such axial piston pumps are relatively expensive.

Furthermore, they have the disadvantage that they are characterized by high pulsation rates, particularly at low speeds, which eventually does not only result in undesirable vibrations but in a relatively high noise level.

In addition, the known bar and tube extruding presses have a relatively high power consumption.

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