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Bar press with hydraulic drive

a bar press and hydraulic drive technology, applied in the field of bar and tube extruder press, can solve the problems of relatively high noise level, undesirable vibration, and relatively high cost of axial piston pump, and achieve the effect of high shear strength

Inactive Publication Date: 2020-02-06
SMS GRP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a driving device for a bar and tube extruding press. It allows for the use of larger electrical motors with higher mass moments of inertia and smaller frequency converters to control the speed of the internal gear pumps. This results in quieter operation and reduced noise. The technical effects are improved performance and efficiency of the extruding press.

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.

Method used

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  • Bar press with hydraulic drive
  • Bar press with hydraulic drive

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Embodiment Construction

[0070]Of a bar and tube extruding press or a metal extrusion press 1, FIG. 1 essentially shows a base frame. This consists of a cylinder bar 2 and a counter bar 4, not displayed here, which is braced to it by way of traction sipes 3 (cf. for instance, FIG. 8a). Further contributing to the frictional connection between these components are pressure columns 5, which envelop the traction sipes 3 between the cylinder bar 2 and the counter bar 4. The pressure columns 5 also serve as guide supports of a male die traverse 6 which is movable in the base frame, and of a movable ingot container holder 7. The ingot container holder 7, which holds an ingot container or recipient 8, is moved by way of electric motors 12 or 13, specifically of servo drives, like the male die traverse 6, which supports the advance end of a press piston 11 guided with hydrostatic bearings in its cylinder housing 9 in the counter bar 4 (cf. FIGS. 2 through 4). Such an electric motor 12 or 13 is provided on each long...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B21C23/21
CPCB21C23/211B21C23/08
Inventor WERSHOFEN-CROMBACH, ANDREASHAGEN, EWALDFREHE, STEPHAN
Owner SMS GRP GMBH
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