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AssigneeHatebur Umformmaschinen AG
InventorsChristian Burgin, Thomas Christoffel, Andreas Matt, Patrick Stemmelin, Mihai Vulcan
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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.
A method for producing a formed part furnished with a through hole, in which a rod material is advanced by a defined length in the direction of its lengthwise extension into a forming die, the inner circumferential wall of which defines the outer circumference of the formed part to be produced, through a stationary guide having the same cross sectional shape as the rod material, the part of the rod material that is inside the forming die is penetrated axially and then separated from the rest of the rod material, and the formed part produced thereby is then transported away, wherein the rod material is immobilised axially after being advanced into the forming die, the portion of the rod material located inside the forming die is penetrated axially and at the same time impact extruded by at least one dishing tool, the displaced material flows between the at least one dishing tool and the inner circumferential wall of the forming die, the formed part formed thereby and located inside the forming die is rotated coaxially relative to the rest of the rod material together with the forming die surrounding it and the at least one dishing tool, and the formed part is thus separated from the rest of the rod material.
A device for producing a formed part furnished with a through hole, comprising advancing means and immobilising means for a rod material, a guide for the rod material, a forming die and penetration means for axially penetrating the part of the rod material that is located in the forming die, and a driving means with which the forming die including the portion of the rod material contained therein, which after axial penetration becomes a formed part, and the rest of the rod material are rotatable relative to each other, wherein the formed part can be separated from the rest of the rod material by torsion shearing.
Dependencies are inferred from the claim text.