Compound and a method of using the compound

Patent metadata

Field	Value
Publication number	US-2021107078-A1
Application number	US-202017036443-A
Country	US
Kind code	A1
Filing date	Sep 29, 2020
Priority date	Oct 14, 2019
Publication date	Apr 15, 2021
Grant date	—

Abstract

A dielectric gel for use in electro-discharge machining. Aspects of the dielectric gel include a liquid solvent phase entrapped in a three-dimensionally cross-linked fibre network.

First claim

We claim:

1 . A dielectric gel for use in electro-discharge machining, comprising a liquid solvent phase entrapped in a three-dimensionally cross-linked fibre network.

2 . The dielectric gel as claimed in claim 1 , wherein the liquid solvent phase comprises a polar liquid selected from the group consisting of water, arsenic, bismuth, gallium, germanium, and silicon

3 . The dielectric gel as claimed in claim 1 , wherein the three-dimensionally cross-linked fibre network comprises hydrophilic polymers.

4 . The dielectric gel as claimed in claim 1 , wherein the liquid solvent phase comprises an organic solvent and water.

5 . The dielectric gel as claimed in claim 4 , wherein the organic solvent is selected from the group consisting of aliphatic and aromatic hydrocarbons, silicone oil, dimethyl sulfoxide, isopropyl myristate, and vegetable oils.

6 . The dielectric gel as claimed in claim 4 , wherein the three-dimensionally cross-linked fibre network comprises a fibrous structure formed by a gelator.

7 . The dielectric gel as claimed in claim 6 , wherein the gelator is selected from the group consisting of lecithin, isopropyl myristate, isopropyl palmitate, dibutyllauroylglutamide, propylene glycol, polyethylene, polyhydric alcohols, sorbitan monostearate, sorbitan monopalmitate, and N-lauryl-L-alanine methyl ester.

8 . A method of electro-discharge machining (EDM) an article, the article being located in a workpiece, the method comprising the steps of:
providing an EDM device comprising an erosion electrode, and a ground electrode; positioning the erosion electrode proximal to the article; positioning the ground electrode in conductive connection with the article; providing a dielectric gel according to claim 1 , to a region bridging the erosion electrode and the article; moving the erosion electrode towards the article and into the dielectric gel; and generating an electrical potential in the erosion electrode sufficient to cause a breakdown in a gap between the erosion electrode and the article, to thereby cause a portion of the article to be eroded, the eroded portion being suspended in the dielectric gel.

9 . The method as claimed in claim 8 , wherein the erosion electrode is hollow, and the dielectric gel is dispensed to the region bridging the erosion electrode and the article through the hollow erosion electrode.

10 . The method as claimed in claim 8 , wherein an end of the erosion electrode is coated with the dielectric gel, and as the erosion electrode is moved towards the article, the dielectric gel bridges the region between the erosion electrode and the article.

11 . The method as claimed in claim 8 , wherein the dielectric gel has a viscosity characteristic such that a viscosity of the dielectric gel decreases with an increase of the temperature of the region bridging the erosion electrode and the article.

12 . The method as claimed in claim 8 , wherein the method comprises the additional step of:
evacuating the dielectric gel from the region bridging the erosion electrode and the article.

13 . A computer program that, when read by a computer, causes performance of the method as claimed in claim 8 .

14 . A non-transitory computer readable storage medium comprising computer readable instructions that, when read by a computer, causes performance of the method as claimed in claim 8 .

15 . A signal comprising computer readable instructions that, when read by a computer, causes performance of the method as claimed in claim 8 .

Assignees

• Rolls Royce Plc

Inventors

• Ahmed Shamraze
• Clare Adam
• Kell James
• Clark Daniel
• Speidel Alistair G
• Castro Palacios Monica M
• Smith Peter H
• NOVOVIC Donka

Classifications

• C08J3/075

  Macromolecular gels · CPC title

• B23H9/001

  Disintegrating · CPC title

• B23H1/08 Primary

  Working media · CPC title

• B01J13/0065

  containing an organic phase · CPC title

• B23H1/10

  Supply or regeneration of working media · CPC title