Method and device for producing rotationally symmetrical metal components

Patent metadata

Field	Value
Publication number	US-10953449-B2
Application number	US-201514963320-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Jun 17, 2013
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A method for producing rotationally symmetric structural components of metal, in particular steel, is provided. A blank is arranged in a torsion-proof manner on a first receptacle, the receptacle is rotated about a rotation axis so that the blank is caused to rotate about this rotation axis, at least one linear shaping element with a contour having at least partially an unrolled external contour of the rotationally symmetric structural component or a preform of the structural component is moved tangentially to the surface of the synchronously rotating blank, and the linear shaping element is at the same time pressed against the blank so that during the tangential movement the contour of the linear shaping element is formed at least partially into the blank. A kingpin or link pin of a connection link with a connection shaft and a link outer part is produced.

First claim

The invention claimed is:

1. A method comprising the steps of:
arranging a metal blank on a first receptacle such that the metal blank is rotationally fixed in relation to the first receptacle, the metal blank having an external contour having at least a first axial section and a second axial section,
rotating the first receptacle about a rotation axis so that the metal blank rotates with the first receptacle about the rotation axis,
moving at least one linear shaping element with a first contour and a second contour tangentially to the surface of the rotating metal blank, the first contour being different from the second contour,
pressing the at least one linear shaping element against the metal blank at the same time as moving the at least one linear shaping element so that the first contour of the linear shaping element is formed at least partially into the first axial section of the metal blank and so that the second contour of the linear shaping element is formed at least partially into the second axial section of the metal blank.

2. The method according to claim 1 , wherein the at least one linear shaping element is subdivided in a direction of the rotation axis into a first segment and a second segment, wherein the first segment of the at least one linear shaping element includes the first contour and is associated with the first section of the blank and the second segment of the at least one linear shaping element includes the second contour and is associated with the second section of the blank.

3. The method according to claim 2 , characterised in that the first and second segments of the at least one linear shaping element have different tangential movement velocities during the step of moving the at least one linear shaping element.

4. The method according to claim 1 , characterised in that the at least one linear shaping element is two linear shaping elements in engagement with the metal blank on opposite sides of the metal blank, used to form the external contour into the metal blank.

5. The method according to claim 1 , wherein the first receptacle comprises a third contour and wherein the method further comprises forming an internal contour corresponding to the third contour into the metal blank using the at least one linear shaping element.

6. The method according to claim 5 , further comprising a step of finally forming the internal contour and the external contour of the metal blank on a further rotatable receptacle on a parallel processing line using at least one further linear shaping element moving tangentially to the rotation axis of the blank.

7. The method according to claim 1 , characterised in that the metal blank is a rotationally symmetric preformed blank.

8. The method according to claim 1 , wherein, prior to the step of arranging, the method further comprises preforming a rotationally symmetric blank on a second rotatable receptacle by pressure rolling using at least one roll and wherein the rotationally symmetric blank is the metal blank used in the arranging step.

9. An apparatus comprising:
a first receptacle for a blank of metal rotatable about a rotation axis; and
transforming means comprising:
at least one linear shaping element configured to at least partially form an external contour of a kingpin or a link pin into an exterior of the blank,
means for moving the at least one linear shaping element tangentially and synchronously to the blank, and
means for exerting a force from the at least one linear shaping element onto the blank, so that the external contour is at least partially formed into the blank,

wherein the first receptacle for the blank is configured to at least partially form an internal contour into an interior of the blank at the same time as the at least one linear shaping element at least partially forms the external contour into the exterior of the blank, wherein the at least one linear shaping element is subdivided in the rotation axis direction into at least two segments, which are associated with different axial sections of the blank.

10. The apparatus according to claim 9 , characterised in that means are provided for varying the tangential movement velocities of each of the at least two segments of the at least one linear shaping element or of the respective linear shaping elements.

11. The apparatus according to claim 9 , further comprising at least one linear shaping element receptacle and wherein the means for moving moves at least one segment of the at least one linear shaping element relative to the at least one linear shaping element receptacle.

12. The apparatus according to claim 9 , wherein the at least one linear shaping elements comprises a first linear shaping element and a second linear shaping element, wherein the first linear shaping element and the second linear shaping element are in engagement with the blank on opposite sides of the blank.

13. An apparatus comprising:
a receptacle for a blank of metal rotatable about a rotation axis; and
transforming means comprising:
at least one linear shaping element configured to at least partially form an external contour into an exterior of the blank,
means for moving the at least one linear shaping element tangentially and synchronously to the blank, and
means for exerting a force from the at least one linear shaping element onto the blank, so that the external contour is at least partially formed into the blank,
wherein the receptacle for the blank is configured to at least partially form an internal contour into an interior of the blank at the same time as the at least one linear shaping element at least partially forms the internal contour into the exterior of the blank,

wherein the apparatus further comprises a final forming device comprising:
at least one further linear shaping element configured to form an external contour of a rotationally symmetric structural component, the rotationally symmetric structural component being formed from the blank,
a further receptacle for the rotationally symmetric structural component rotatable about a rotation axis,
means for moving the at least one further linear shaping element tangentially and synchronously to the rotationally symmetric structural component, and
means for exerting a force from the at least one further linear shaping element onto the rotationally symmetric structural component, so that the rotationally symmetric structural component can be finally formed.

Assignees

• Goevert Michael
• Malkemper Christian
• Brinkkoetter Susanne
• Thyssenkrupp Steel Europe Ag

Inventors

• Gövert Michael
• Malkemper Christian
• Brinkkötter Susanne

Classifications

• B21D17/00 Primary

  Forming single grooves in sheet metal or tubular or hollow articles · CPC title

• B21H5/027

  by rolling using reciprocating flat dies, e.g. racks (B21H5/022 takes precedence) · CPC title

• B21H7/00

  Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons (nails, pins B21G3/30) · CPC title

• B21D22/16

  over shaping mandrels or formers · CPC title

• B21D22/08

  with die parts on rotating carriers · CPC title