Method and device for producing a wear-resistant surface on a workpiece

Patent metadata

Field	Value
Publication number	US-11118282-B2
Application number	US-201715498123-A
Country	US
Kind code	B2
Filing date	Apr 26, 2017
Priority date	Apr 26, 2016
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A method including closing upper and lower ends of a bore with upper and lower closure element, respectively; introducing a cathode into the bore; and flowing an electrolyte through an annular space between a wall of the bore an outer surface of the cathode to provide an inner surface of the bore with a wear-resistant surface by electrolysis.

First claim

What is claimed is:

1. A device comprising:
upper and lower closures configured to close a bore of a crankcase, the upper closure having screw holes configured to secure the upper closure to the crankcase via screws;
a cathode extending within the bore from the upper closure towards the lower closure to form an annular space between a bore wall and an outer surface of the cathode and configured to receive a flow of an electrolyte therethrough during electrolysis; and
outlet openings formed in the upper closure and configured to discharge a gas formed during electrolysis.

2. The device of claim 1 , further comprising an inlet line configured to feed the electrolyte into the cathode during electrolysis.

3. The device of claim 1 , wherein a free end of the cathode is spaced apart from the lower closure.

4. The device of claim 1 , wherein the annular space between the bore and the cathode increases continuously in the direction of the lower closure towards the upper closure with a conically tapering configuration of the cathode from a free end in the direction of the upper closure.

5. The device of claim 1 , wherein the cathode is a hollow cathode.

6. The device of claim 1 , further comprising a collecting space situated above the bore and on the upper closure element in which space gas that forms during the electrolysis collection.

7. The device of claim 1 , wherein the outlet openings comprise seven outlet openings.

8. The device of claim 6 , wherein the collection space includes an inflow opening corresponding approximately to a diameter of the bore wall.

9. A device comprising:
upper and lower closures configured to close a bore of a crankcase, the upper closure having screw holes configured to secure the upper enclosure to the crankcase via screws; and
a hollow cathode extending within the bore from the upper closure towards the lower closure to form an annular space between a bore wall and an outer surface of the cathode and configured to receive a flow of an electrolyte therethrough during electrolysis; and
outlet openings formed in the upper closure and configured to discharge a gas formed during electrolysis.

10. The device of claim 9 , further comprising an inlet line configured to feed the electrolyte into the cathode during electrolysis.

11. The device of claim 9 , further comprising a collecting space situated above the bore and on the upper closure element in which space gas that forms during the electrolysis collection.

12. The device of claim 9 , wherein the outlet openings comprise seven outlet openings.

13. The device of claim 11 , wherein the collection space includes an inflow opening corresponding approximately to a diameter of the bore wall.

14. A device comprising:
upper and lower closures configured to close a bore of a crankcase, the upper closure having screw holes configured to secure the upper closure to the crankcase via screws;
a cathode extending within the bore from the upper closure towards the lower closure to form an annular space between a bore wall and an outer surface of the cathode and configured to receive a flow of an electrolyte therethrough during electrolysis;
outlet openings formed in the upper closure and configured to discharge a gas formed during electrolysis;
a hat-like raised portion on the upper closure configured to collect gas formed during electrolysis; and
a cap configured to close the hat-like raised portion and including an outlet opening configured to discharge the electrolyte and the gas.

15. The device of claim 14 , further comprising an inlet line configured to feed the electrolyte into the cathode during electrolysis.

16. The device of claim 14 , wherein a free end of the cathode is spaced apart from the lower closure.

17. The device of claim 14 , wherein the annular space between the bore and the cathode increases continuously in the direction of the lower closure towards the upper closure with a conically tapering configuration of the cathode from a free end in the direction of the upper closure.

18. The device of claim 14 , wherein the cathode is a hollow cathode.

19. The device of claim 14 , wherein the outlet openings comprise seven outlet openings.

20. The device of claim 14 , wherein the hat-like raised portion includes an inflow opening corresponding approximately to a diameter of the bore wall.

Assignees

• Ford Global Tech Llc

Inventors

• Beauvir Jacques
• Morawitz Urban
• Verpoort Clemens Maria

Classifications

• C25D11/005

  Apparatus specially adapted for electrolytic conversion coating (apparatus in general for electrolytic coating C25D17/00) · CPC title

• C25D9/06

  by anodic processes · CPC title

• C25D17/004

  Sealing devices · CPC title

• C25D11/04

  of aluminium or alloys based thereon · CPC title

• C25D11/026 Primary

  Anodisation with spark discharge · CPC title