Electrode and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11440113-B2
Application number	US-201916559033-A
Country	US
Kind code	B2
Filing date	Sep 3, 2019
Priority date	Feb 7, 2012
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An electrode applied in electro-machining processes, where the electrode includes a main body portion and at least one built-in internal flushing passage for introducing a flushing liquid to a volume between the electrode and a workpiece to be machined. The electrode is made by an additive fabrication process that enables specialized flushing for enhancing waste material evacuation and incorporate special material properties like zones of high electrical conductivity and thermal resistance. The fabrication process produces materials and geometries that could not otherwise be made using conventional processing.

First claim

What is claimed is:

1. An electrode applied in electro-machining processes, comprising:
a main body made from an additive material fabrication process comprising a plurality of blocks protruding beyond a circumferential outer surface of the main body; and
at least one internal flushing channel formed by the additive manufacturing process through the main body between entrances on an internal shaft and a plurality of slots between the plurality of blocks configured to introduce a flushing liquid to a volume between the electrode and a workpiece to be machined;
wherein the main body comprises at least two portions made from different materials, wherein the at least two portions further comprise a main portion and a machining portion integrated with the main portion;
wherein the main portion comprises a rotating shaft and a hub capable of rotating with the rotating shaft, and the machining portion is integratedly formed on the hub; and
wherein the at least one internal flushing channel connects entrances on the rotating shaft with a plurality of exits adjacent to the machining portion, respectively.

2. The electrode of claim 1 , wherein the internal flushing channel comprises at least one curved channel.

3. The electrode of claim 2 , wherein the at least one curved channel is curved in a manner to facilitate flushing liquid delivery during rotating of the electrode.

4. The electrode of claim 1 , wherein the additive material fabrication process is a laser forming process.

5. The electrode of claim 1 , wherein the machining portion is configured to act on the workpiece to be machined in order to remove materials from the workpiece, and
wherein the main portion is made from a first electrically conductive material, and the machining portion is made from a second electrically conductive material having a melting point higher than that of the first electrically conductive material.

6. The electrode of claim 5 , wherein the first electrically conductive material comprises at least one of copper, nickel, aluminum, and iron.

7. The electrode of claim 5 , wherein the second electrically conductive material has a melting point higher than about 1800° C.

8. The electrode of claim 7 , wherein the second electrically conductive material comprises at least one of tungsten, molybdenum, and chromium.

9. The electrode of claim 5 , wherein the machining portion provides a circumferential outer surface for acting on the workpiece to be machined.

10. A method for manufacturing an electrode applied in electro-machining processes, comprising:
creating, with an additive material fabrication process, a main body of the electrode comprising a plurality of blocks protruding beyond a circumferential outer surface of the main body, and comprising at least one internal flushing channel formed by the additive manufacturing process through the main body between entrances on an internal shaft and an at least one slot between the plurality of blocks configured to introduce a flushing liquid to a volume between the electrode and a workpiece to be machined;
wherein the main body comprises at least two portions made from different materials, wherein the at least two portions further comprise a main portion and a machining portion integrated with the main portion;
wherein the main portion comprises a rotating shaft and a hub capable of rotating with the rotating shaft, and the machining portion is integratedly formed on the hub; and
wherein the at least one internal flushing channel connects entrances on the rotating shaft with a plurality of exits adjacent to the machining portion, respectively.

11. The method of claim 10 , wherein the internal flushing channel comprises at least one curved channel.

12. The method of claim 11 , wherein the at least one curved channel is curved in a manner to facilitate flushing liquid delivery during rotating of the electrode.

13. The method of claim 10 , wherein the additive material fabrication process is a laser forming process.

14. The method of claim 10 , wherein the machining portion is configured to act on the workpiece to be machined in order to remove materials from the workpiece, and
wherein the main portion is made from a first electrically conductive material, and the machining portion is made from a second electrically conductive material having a melting point higher than that of the first electrically conductive material.

15. The method of claim 14 , wherein the first electrically conductive material comprises at least one of copper, nickel, aluminum, and iron.

16. The method of claim 14 , wherein the second electrically conductive material has a melting point higher than about 1800° C.

17. The method of claim 16 , wherein the second electrically conductive material comprises at least one of tungsten, molybdenum, and chromium.

18. The method of claim 14 , wherein the machining portion provides a circumferential outer surface for acting on the workpiece to be machined.

19. The method of claim 10 , further comprising: providing the digital representation of the electrode with the at least one internal flushing channel for internal liquid flushing.

20. The method of claim 10 , further comprising: applying manufacturing parameters to each of the sequence or stack of layers based on the digital representation.

Assignees

• Gen Electric

Inventors

• Trimmer Andrew Lee
• Luo Yuanfeng
• Wei Bin
• Deaton Jr John Broddus

Classifications

• B22F12/53

  Nozzles · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B23H7/24

  Electrode material · CPC title

• B23H7/22

  Electrodes specially adapted therefor or their manufacture (B23H7/08, B23H7/12, B23H9/00 take precedence) · CPC title

• B23H1/04 Primary

  Electrodes specially adapted therefor or their manufacture (B23H9/00 takes precedence) · CPC title