Device for producing at least one hollow valve

Patent metadata

Field	Value
Publication number	US-9828892-B2
Application number	US-201514965858-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Dec 11, 2014
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A device for producing at least one hollow valve for a gas exchange system may include at least one valve holder. The at least one valve holder may include a valve stem centring element, a valve receptacle and a valve head holder. The valve receptacle may receive a valve stem and the valve head holder may receive a valve head. A first carrier and a second carrier may be provided. The valve holder may be arranged on the first carrier. At least one cathode holder may be arranged on the second carrier. The cathode holder may include a cathode that is insertable through the first carrier via the valve stem centring element. At least one contact plate may be arranged opposite the valve head holder.

First claim

The invention claimed is:

1. A device for producing at least one hollow valve for a gas exchange system, comprising:
at least one valve holder, the at least one valve holder including a valve stem centring element, a valve receptacle and a valve head holder, wherein the valve receptacle is configured to receive a valve stem and the valve head holder is configured to receive a valve head;
a first carrier and a second carrier, wherein the at least one valve holder is arranged on the first carrier via the valve stem centring element;
at least one cathode holder arranged on the second carrier, the at least one cathode holder including a cathode insertable through the first carrier via the valve stem centring element and into a bore in the valve stem when the valve stem is received by the valve receptacle;
at least one contact plate disposed opposite the valve head holder; and
wherein the first carrier is arranged between the second carrier and the at least one contact plate, and wherein the at least one valve holder is disposed on the first carrier on a side facing towards the contact plate.

2. The device according to claim 1 , wherein the cathode penetrates through the first carrier.

3. The device according to claim 2 , wherein the valve stem centring element includes a passage receiving the cathode, further including a seal disposed in the passage sealing off the cathode from the valve stem centring element.

4. The device according to claim 2 , wherein the first carrier is movable relative to the second carrier.

5. The device according to claim 2 , wherein the first carrier is movable relative to the at least one contact plate.

6. The device according to claim 1 , wherein the cathode is sealed off via a seal from the valve stem centring element.

7. The device according to claim 6 , wherein the first carrier is fixed in position, and wherein the second carrier and the at least one contact plate are movable relative to the first carrier.

8. The device according to claim 6 , wherein the valve stem centring element includes one of an electrolyte supply and an electrolyte discharge and the at least one cathode holder includes the other of the electrolyte supply and the electrolyte discharge.

9. The device according to claim 1 , wherein the at least one contact plate is composed at least partially of an electrically conductive material.

10. The device according to claim 9 , wherein the electrically conductive material includes at least one of stainless steel and copper.

11. The device according to claim 1 , wherein the first carrier is movable relative to at least one of the second carrier and the at least one contact plate.

12. The device according to claim 11 , wherein the valve head holder is movable relative to the valve receptacle.

13. The device according to claim 1 , wherein the first carrier is fixed, and wherein at least one of the second carrier and the at least one contact plate is movable relative to the first carrier.

14. The device according to claim 1 , wherein the valve head holder is mounted resiliently and axially movable relative to the valve receptacle with respect to a valve stem axis.

15. The device according to claim 1 , wherein the at least one contact plate is movable relative to the first carrier, and further including a stop arranged between the first carrier and the at least one contact plate.

16. The device according to claim 1 , wherein the first carrier is movable relative to the second carrier when the hollow valve is mounted on the at least one contact plate.

17. The device according to claim 1 , wherein at least one of:
the valve stem centring element includes an electrolyte supply and the at least one cathode holder includes an electrolyte discharge; and
the valve stem centring element includes an electrolyte discharge and the at least one cathode holder includes an electrolyte supply.

18. The device according to claim 1 , wherein the valve receptacle is configured to mount the valve stem in at least one of a suspended relationship, a standing relationship and a lying relationship.

19. A device for producing at least one hollow valve for an internal combustion engine, comprising:
a valve holder including a valve receptacle and a valve head holder, wherein the valve receptacle is configured to receive a valve stem and the valve head holder is configured to receive a valve head;
a first carrier arranged between a second carrier and a contact plate, wherein the valve holder is arranged on the first carrier via a valve stem centring element;
a cathode holder arranged on the second carrier, the cathode holder including a cathode insertable through the first carrier via the valve stem centring element and into a bore of the valve stem when the valve stem is received by the valve receptacle;
wherein the contact plate is arranged opposed to the valve head holder; and
wherein the first carrier is movable relative to the contact plate.

20. A device for producing at least one hollow valve for an internal combustion engine, comprising:
a valve holder including a valve receptacle and a valve head holder, the valve receptacle configured to receive a valve stem and the valve head holder configured to receive a valve head;
a first carrier arranged between a second carrier and a contact plate, wherein the valve holder is arranged on the first carrier via a valve stem centring element;
a cathode holder arranged on the second carrier, the cathode holder including a cathode insertable through the first carrier via the valve stem centring element and into a bore of the valve stem when the valve stem is received by the valve receptacle; and
wherein the contact plate is disposed opposite to the valve head holder, and wherein the valve head holder is mounted resiliently and axially movable relative to the valve receptacle with respect to a valve stem axis.

Assignees

• Mahle Int Gmbh

Inventors

• Kroos Peter
• Luven Christoph

Classifications

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• B23H9/00

  Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects (heat treatment by cathodic discharge C21D1/38) · CPC title

• F01L3/14

  by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve · CPC title

• B23H3/00 Primary

  Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte · CPC title

• B23H7/26

  Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode · CPC title