GB768230A - Improvements in and relating to apparatus for cutting or working electrically conductive materials - Google Patents
Improvements in and relating to apparatus for cutting or working electrically conductive materialsInfo
- Publication number
- GB768230A GB768230A GB1535453A GB1535453A GB768230A GB 768230 A GB768230 A GB 768230A GB 1535453 A GB1535453 A GB 1535453A GB 1535453 A GB1535453 A GB 1535453A GB 768230 A GB768230 A GB 768230A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gaps
- additional
- spark
- gap
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
768,230. Cutting by spark discharge. SPARCATRON, Ltd. Jan. 27, 1955 [June 3, 1953], No. 15354/53. Class 83 (4). Apparatus for the electro erosion of metals, particularly metal carbides, tool steel and stainless steel by electric spark discharges from a capacitance 3 across a gap between an electrode 1 and workpiece 2, has at least two spark gaps in series in the discharge circuit. One or more additional spark gaps 6, 7 may be provided in a direct current supply circuit, Fig. 5. In an alternating current supply circuit, Fig. 4, an electrode 1 is connected through an additional spark gap 6 with one side of the capacitance 3 and another electrode 10 is connected to the other side. The workpiece 2 is earthed. An inductance 11 may be provided in the discharge circuit and/or in the charging circuit to render the circuit resonant. The additional spark gaps may be air gaps or they may be immersed in a liquid dielectric or electrolyte contained in receptacles 12, 13. Preferably the additional spark gaps consist of tungsten electrodes immersed in paraffin whose dielectric strength has been decreased by a colloidal suspension of graphite, the paraffin being circulated through the gap by a stirring device. Alternatively one or more of the additional gaps may be formed by_rotary interrupter electrodes, Fig. 6 (not shown). Rectifiers may also be included in the discharge circuit. The additional gap or gaps may-have means for automatically maintaining the gap or gaps constant or at predetermined different widths and automatic means may be provided for cleaning the electrodes. In rotary interrupter type gaps the speed of the interruptions may be varied. A protective casing may be provided for the workpiece and/or its electrode and/or the additional gaps and a safety device thereon renders the apparatus inoperative when the casing is out of position. Specifications 637,872 and 756,727 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1535453A GB768230A (en) | 1953-06-03 | 1953-06-03 | Improvements in and relating to apparatus for cutting or working electrically conductive materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1535453A GB768230A (en) | 1953-06-03 | 1953-06-03 | Improvements in and relating to apparatus for cutting or working electrically conductive materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB768230A true GB768230A (en) | 1957-02-13 |
Family
ID=10057659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1535453A Expired GB768230A (en) | 1953-06-03 | 1953-06-03 | Improvements in and relating to apparatus for cutting or working electrically conductive materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB768230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3067317A (en) * | 1958-12-20 | 1962-12-04 | Philips Corp | Spark discharge electro-erosion apparatus |
-
1953
- 1953-06-03 GB GB1535453A patent/GB768230A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3067317A (en) * | 1958-12-20 | 1962-12-04 | Philips Corp | Spark discharge electro-erosion apparatus |
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