Hatebur Umformmaschinen Ag

Andreas Matt

Andreas Maritz

Mihai Vulcan

Raymond Schoenenberger

Markus Moser

Thomas Christoffel

Michael Suter

Patrick Stemmelin

Simon Reimer

Raymond Sch&ouml;nenberger

Stephan Leibundgut

Christian Burgin

Olivier Ritter

Heinz Stutzmann

Christian Bürgin

A ring rolling device for enlarging a ring blank includes a press element, a rotatably mounted mandrel and an advancing arrangement in which the mandrel is rotatably mounted with a first end part in a first rolling bearing and with a second end part in a second rolling bearing. The ring blank can be mounted around the mandrel. By means of the advancing arrangement, the mandrel is movable towards the press element and away from the latter again, wherein a roll gap which decreases in size, and in which the ring blank is rolled, is formed between the mandrel and the press element. The two rolling bearings are arranged axially fixed in the advancing arrangement, and the mandrel is mounted so as to be axially movable relative to these two rolling bearings.

Ring rolling device with axially fixed rolling bearings

A transport apparatus for transferring workpieces in a processing device includes at least two stations having at least two gripping tool units arranged on a gripping tool support which is movable back and forth between the stations of the processing device. The gripping tool support is movably mounted so as to be linearly guided and mounted by a parallelogram guide arrangement so as to be displaceable transversely with respect to its linearly guided movability. The gripping tool support is movable by a gripping tool support drive with two crank gear arrangements each having a gripping tool support drive motor.

Transport apparatus for transferring workpieces in a processing device

In a transport method for transferring workpieces between a plurality of successive stations of a processing device, especially a forming device, workpieces are in each case transported from one station to the respective next station of the processing device simultaneously by means of a plurality of gripping tools which are movable jointly in a transport cycle. In the event of a process disturbance, the transport cycle is suspended and the gripping tools with the workpieces are moved into a waiting position in which the workpieces are outside the operating range of processing tools of the stations of the processing device. Once the process disturbance has been eliminated, the transport cycle of the workpieces is resumed. By virtue of the movement of the gripping tools into a safe waiting position outside the operating range of the processing tools of the stations, consequent damage resulting from the process disturbance can be prevented.

Transport method for transferring workpieces

In order to produce a formed part furnished with a through hole, a rod material is advanced by a defined length in the direction of its lengthwise extension into a forming die through a stationary guide and then immobilised by a clamping arrangement that engages with it circumferentially. The end portion of the rod material is then axially swaged by a swaging tool and is thus shaped into a disc, the circumference of which is defined by the forming die. The disc is then penetrated axially by a dishing tool and impact extruded at the same time, the displaced material flowing between the dishing tool and the inner circumferential wall of the forming die. The formed part located in the forming die is then rotated coaxially relative to the rest of the rod material and thereby separated from the rest of the rod material by torsion shearing.

Method for producing a formed part furnished with a through hole

To produce a molded part with a through-hole, a rod-shaped blank is pushed through a guide into a cavity and fixed in place. The end region of the blank is compressed and reshaped into a disk. A disk core having the same cross-sectional shape as the blank is ejected out of the disk using a punch and pushed into the guide and moved back together with the unshaped part of the blank. The disk is severed from the disk core and the molded part is removed from the cavity. During the penetration step, the disk present in the cavity is subjected to an axial pressure in the disk core ejection direction and the blank is subjected to an axial counter-force opposite to the disk core ejection direction.

Method for producing a molded part provided with a through-hole

A hot-forming machine for the hot-pressing of workpieces comprises a die (,), an associated extendable and retractable ejector (,) and a forwardly and backwardly movable press ram (,). The ejector (,) is connected to a control piston (,) arranged displaceably in a pressure chamber (,). Liquid can flow out of the pressure chamber (,) via a liquid outlet bore (,) and a liquid discharge line (,). By means of a throttle (,) arranged in the liquid discharge line (,) the outflow of liquid and therefore the repulsion of the extended ejector (,) by the forwardly moving press ram (,) are delayed in such a way that a workpiece (,) arranged between ejector (,) and press ram (,) is pre-upset and descaled outside the die (,).

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Murg, Germany

Andreas Matt