GB773782A - Improvements in or relating to methods and apparatus for cutting electrically conductive materials - Google Patents
Improvements in or relating to methods and apparatus for cutting electrically conductive materialsInfo
- Publication number
- GB773782A GB773782A GB2064653A GB2064653A GB773782A GB 773782 A GB773782 A GB 773782A GB 2064653 A GB2064653 A GB 2064653A GB 2064653 A GB2064653 A GB 2064653A GB 773782 A GB773782 A GB 773782A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- workpiece
- electrode
- july
- relating
- 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
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
773,782. Cutting by spark discharges. SPARCATRON, Ltd., and RUDORFF, D. W. A. F. July 7, 1954 [July 24, 1953], No. 20646/53. Class 83 (4). In a method of eroding a workpiece by electric spark discharge in which the electrode 6 is maintained at negative potential, reverse flow of current across the spark gap from the electrode 6 to the workpiece 7 is prevented by providing a unidirectional shunt 8 across the electrode and workpiece through which the reverse current flow is by-passed. The shunt may include a selenium or copper oxide rectifier 8, which may be in series with a variable resistance and/or an inductance, or a thermionic valve rectifier whose filament current may be varied, Fig. 4 (not shown). Alternatively the short-circuit may include cyclically operated mechanical contactors. The charging current for the capacitors 4, 5 may be alternating or alternatively direct current may be used.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2064653A GB773782A (en) | 1953-07-24 | 1953-07-24 | Improvements in or relating to methods and apparatus for cutting electrically conductive materials |
| FR1105359D FR1105359A (en) | 1953-07-24 | 1954-07-23 | Method and apparatus for cutting or severing electrically conductive materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2064653A GB773782A (en) | 1953-07-24 | 1953-07-24 | Improvements in or relating to methods and apparatus for cutting electrically conductive materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB773782A true GB773782A (en) | 1957-05-01 |
Family
ID=10149356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2064653A Expired GB773782A (en) | 1953-07-24 | 1953-07-24 | Improvements in or relating to methods and apparatus for cutting electrically conductive materials |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1105359A (en) |
| GB (1) | GB773782A (en) |
-
1953
- 1953-07-24 GB GB2064653A patent/GB773782A/en not_active Expired
-
1954
- 1954-07-23 FR FR1105359D patent/FR1105359A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1105359A (en) | 1955-11-30 |
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