Method for processing a plate workpiece

Patent metadata

Field	Value
Publication number	US-10297384-B2
Application number	US-201615347322-A
Country	US
Kind code	B2
Filing date	Nov 9, 2016
Priority date	Nov 10, 2015
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A workpiece made of plate is subjected to a treatment which locally modifies its magnetic permeability. Subsequently, the magnetic permeability of the workpiece is examined locally resolved by a probe in order to find at least one surface region which is suitable for intended processing, and the processing is performed locally limited to the selected region.

First claim

What is claimed is:

1. A method for processing a workpiece made of plate comprising:
treating the workpiece to modify a magnetic permeability of a local region thereof;
subsequently examining the magnetic permeability of the workpiece to find at least one surface region which is suitable for an intended processing; and
processing the workpiece to perform the intended processing relative to the at least one surface region,
wherein treating the workpiece comprises alloying an additive material into the local region of the workpiece.

2. The method according to claim 1 , wherein the workpiece is ferritic and treating the workpiece further comprises austenitizing the local region of the workpiece.

3. The method according to claim 1 , wherein the workpiece is austenitic and treating the workpiece further comprises ferritizing the local region of the workpiece.

4. The method according to claim 1 , wherein processing the workpiece comprises cutting the workpiece relative to the at least one surface region to obtain a part from the workpiece configured for further processing.

5. The method according to claim 4 , wherein the workpiece comprises a plurality of identically formed austenitized regions, the method further comprising cutting a plurality of parts from the workpiece, each of the plurality of parts having a similarly arranged austenitized region.

6. The method according to claim 5 , wherein the workpiece comprises a plate strip.

7. The method according to claim 5 , wherein the workpiece comprises a blank.

8. The method according to claim 1 , wherein processing the workpiece comprises forming the local region.

9. The method according to claim 1 , wherein the local region comprises a fastening point configured to receive a second workpiece for fastening with at least one of welding, screwing, or riveting.

10. The method according to claim 9 , wherein the fastening point is selected in an austenitized surface region.

11. A method for processing a workpiece made of plate comprising:
providing an austenitic workpiece;
ferritizing the workpiece to modify a magnetic permeability of a local region thereof;
subsequently examining the magnetic permeability of the workpiece to find at least one surface region which is suitable for an intended processing; and
processing the workpiece to perform the intended processing relative to the at least one surface region,
wherein processing the workpiece comprises cutting the workpiece relative to the at least one surface region to obtain a part from the workpiece configured for further processing.

12. The method according to claim 11 , wherein the workpiece comprises a plurality of identically formed austenitized regions, the method further comprising cutting a plurality of parts from the workpiece, each of the plurality of parts having a similarly arranged austenitized region.

13. The method according to claim 12 , wherein the workpiece comprises a plate strip.

14. The method according to claim 12 , wherein the workpiece comprises a blank.

15. The method according to claim 11 , wherein processing the workpiece comprises forming the local region.

16. The method according to claim 11 , wherein the local region comprises a fastening point configured to receive a second workpiece fastening with at least one of welding, screwing, or riveting.

17. The method according to claim 16 , wherein the fastening point is selected in an austenitized surface region.

18. A method for processing a workpiece made of plate comprising:
providing a ferritic workpiece;
austenitizing the workpiece to modify a magnetic permeability of a local region thereof;
subsequently examining the magnetic permeability of the workpiece to find at least one surface region which is suitable for an intended processing; and
processing the workpiece to perform the intended processing relative to the at least one surface region,
wherein processing the workpiece comprises cutting the workpiece relative to the at least one surface region to obtain a part from the workpiece configured for further processing.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Sanders Ronald
• Baumgart Hartmut

Classifications

• C21D2211/005

  Ferrite · CPC title

• C21D2201/00

  Treatment for obtaining particular effects · CPC title

• H01F41/0253 Primary

  for manufacturing permanent magnets · CPC title

• C21D9/48

  deep-drawing sheets · CPC title

• B23K9/00

  Arc welding or cutting · CPC title