Forming machine, particularly ring-rolling machine

Abstract

A forming machine, particularly a ring-rolling machine, which includes a hydraulically regulated linear axle, which is driven by way of an electro-hydrostatic actuator, can work precisely while having a simple mechanical-engineering structure. The machine may have at least one further hydraulically regulated linear axle, which is driven by way of an electro-hydrostatic actuator or by way of a drive other than an electro-hydrostatic actuator.

Claims

1. A forming machine comprising: (a) a radial roll stand carrying radial rolling rollers; (b) a radially displaceable mandrel lifting apparatus disposed on said radial roll stand being radially displaceable with respect to said radial roll stand by way of a drawing frame; (c) an axial roll stand carrying axial rolling rollers; (d) at least one hydraulically regulated linear axle regulated via an electro-hydrostatic actuator; (e) a control electrically coupled to said electro-hydrostatic actuator; (f) an electro-hydrostatic direct drive comprising a housing and hydraulics disposed within said housing, said electro-hydrostatic drive comprising the electro-hydrostatic actuator, wherein the at least one hydraulically regulated linear axle is coupled to the electro-hydrostatic actuator, and the electro-hydrostatic actuator controls a movement of the at least one hydraulically regulated linear axle; and (g) a hydraulic oil tank coupled to the electro-hydrostatic actuator.

2. The forming machine according to claim 1, further comprising a further drive and at least one further hydraulically regulated linear axle.

3. The forming machine according to claim 2, wherein the further drive comprises the at least one further hydraulically regulated linear axle.

4. The forming machine according to claim 1, wherein the forming machine is a rolling machine.

5. The forming machine according to claim 1, wherein the forming machine is a forging machine.

6. The forming machine according to claim 5, wherein the forming machine is a radial forging machine.

7. The forming machine according to claim 4, wherein the rolling machine is a ring-rolling machine.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages, goals, and properties of the present invention will be explained using the following description of an exemplary embodiment, which is also particularly shown in the attached drawing. In the drawing,

(2) the sole FIGURE shows a schematic side view of a ring-rolling machine.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(3) The ring-rolling machine 4 shown in the FIGURE, structured as a forming machine 1, comprises multiple hydraulically regulated linear axles 2, which are controlled, in each instance, by way of electro-hydrostatic actuators 3, as well as radial drives 5, 6 and axial drives 7, 8, which drive corresponding radial rolling rollers 10 and upper and lower axial rolling rollers 11, 12 by way of their roll shafts 9, in each instance.

(4) In known manner, the ring-rolling machine 4 comprises a radial roll stand 15, on which a mandrel lifting apparatus 16 is radially displaceable by way of an upper drawing frame 17, wherein the mandrel lifting apparatus 16 in turn can axially displace the mandrel, which is not shown for the sake of clarity. Likewise, a lower drawing frame 18 is provided for further modules. For example, the ring-rolling machine 4 shown in the FIGURE also has an intake-side centering unit 19 as well as a radially displaceable axial roll stand 14, which carries the two axial rolling rollers 11 and 12, and an axially displaceable pusher 20, by means of which the upper axial rolling roller 11 of the two axial rolling rollers 11, 12 can be axially set. All of these movement possibilities are controlled by way of hydraulically regulated linear axles 2, by means of electro-hydrostatic actuators 3, in this exemplary embodiment.

(5) The radial drives 5, 6 and axial drives 7, 8 are structured as torque motors, in each instance, and are connected to interact with the related roll shafts 9 without a gear mechanism. In this connection, the upper and lower roll shafts 9 of the radial drives 5, 6, which are each connected with the radial rolling roller 10, are configured in one piece in this exemplary embodiment, wherein in an alternative embodiment, they can also be disposed in multiple pieces but coaxially, one under the other, and can be connected with the radial rolling roller 10 directly or indirectly, in each instance.

(6) Therefore the forming machine 1 relies on direct drives and thereby guarantees a simple mechanical-engineering structure, without the precision suffering as a result. In particular, it is also possible to do without complex hydraulic systems, which also have to be transferred to moving modules and therefore require great line effort.

(7) Hydraulic oil tanks 22 for the related electro-hydrostatic actuators 3 are merely numbered as examples. These oil tanks 22 are preferably disposed on locally fixed modules with regard to the electro-hydrostatic actuators 3 to which they deliver the oil, in each instance, so that here, too, it is possible to do without movable hydraulic lines. Preferably, the oil tanks 22 are integrated into the electro-hydrostatic actuators 3. It is understood that such an arrangement of the oil tanks 22 on modules that are locally fixed with regard to the electro-hydrostatic actuators 3 or the integration of the oil tanks 22 into electro-hydrostatic actuators 3 or their housings is advantageous even independent of the other characteristics of the present invention, in a forming machine 1 having hydraulically regulated linear axles 2, even if electro-hydrostatic actuators 3 are not necessarily used, but rather other actuators that use hydraulic fluid are used.

(8) Thus, although at least one embodiment of the present invention has been shown and described, it is to be understood that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.