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: 2017-04-27
SMS GRP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0049]It is preferred even without the other features of the invention that a mineral oil with a high shear strength is used as hydraulic oil to start the at least one internal gear pump at the bar and tube extruding press without damage, particularly in mixed operation.
[0050]It is also preferred that the driving device is connected to a control unit in which a characteristic curve or a plurality of characteri

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 event

Method used

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Examples

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Embodiment Construction

[0054]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

The invention relates to a bar and tube extruding press for forming metal ingots into profiles, tubes, bars 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 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, characterized in that on the one hand the driving device comprises at least one speed-controlled internal gear pump for providing the hydraulic oil to the at least one main cylinder, by means of which the at least one main cylinder can be driven, and in that on the other hand the driving device additionally comprises 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, by means of which the male die can he 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 means of the at least one main cylinder.

Description

FIELD OF THE INVENTION[0001]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.PRIOR ART[0002]Such bar and tube extruding presses have been known for decades in prior art and are used for producing the most varied components from typically metallic materials, which are pressed through a female die and subjected to forming at a high degree of deformation.[0003]Main features of conventional bar extruding presses are an ingot loader between the male die and the ingot container and the generation of pressing force using a main cylinder and an advance and / or return cylinder, wherein all auxiliary movements, inc...

Claims

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Application Information

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IPC IPC(8): B21C23/21
CPCB21C23/211
Inventor WERSHOFEN-CROMBACH, ANDREASHAGEN, EWALDFREHE, STEPHAN
Owner SMS GRP GMBH
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