GB1415941A - Apparatus for electrolytically etching - Google Patents
Apparatus for electrolytically etchingInfo
- Publication number
- GB1415941A GB1415941A GB3183573A GB3183573A GB1415941A GB 1415941 A GB1415941 A GB 1415941A GB 3183573 A GB3183573 A GB 3183573A GB 3183573 A GB3183573 A GB 3183573A GB 1415941 A GB1415941 A GB 1415941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- workpiece
- electrode
- july
- signal
- output
- 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
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Weting (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
1415941 Electrolytic etching MITSUBISHI DENKI K K 4 July 1973 [5 July 1972 20 July 1972] 31835/73 Heading C7B [Also in Division H2] In apparatus for electrolytically etching a workpiece, the electrode 7 and workpiece 9 are connected respectively to output poles of a rectifier 6 rectifying the output of a step-down transformer 5 connected through a saturable reactor 4 to a three phase A.C. power source 1, and a detector 25 for detecting an abnormal phenomenon between the electrode and workpiece (e.g. sparking or current attenuation caused by oxide formation) imposes a signal on lines 12' and 36 which turns on thyristor 35 connected by way of diodes 34 to the primary windings of the transformer to short the output of the reactor. Simultaneously breakers 2 may be opened by a signal on line 33. A working gap shorting thyristor 28 (turned on by signal on line 30) and bias capacitor 37 (charged via line 39 from circuit 38) may be connected in series between the electrode and workpiece to break the working current. The detector may be arranged to make a succession of measurements of the working current (and voltage) by using sample and hole circuit and an operation amplifier to detect abnormal current attenuation (or sparks caused between the electrode and workpiece) by an abnormal phenomenon finding circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47067216A JPS4926897A (en) | 1972-07-05 | 1972-07-05 | |
| JP7273272A JPS5332352B2 (en) | 1972-07-20 | 1972-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1415941A true GB1415941A (en) | 1975-12-03 |
Family
ID=26408392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3183573A Expired GB1415941A (en) | 1972-07-05 | 1973-07-04 | Apparatus for electrolytically etching |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH588569A5 (en) |
| DE (1) | DE2333840C3 (en) |
| GB (1) | GB1415941A (en) |
| IT (1) | IT990962B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8903275D0 (en) * | 1989-02-14 | 1989-04-05 | Rolls Royce Plc | Electro chemical machining |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1565095C3 (en) * | 1965-11-02 | 1978-03-02 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Arrangement for limiting the short-circuit energy on the tool and workpiece in the case of electrolytically abrasive machines |
| DE1565262A1 (en) * | 1967-11-14 | 1970-02-05 | Aeg Elotherm Gmbh | Circuit arrangement for the protection of devices for electrochemical removal against short circuits |
| DE1816865A1 (en) * | 1968-12-24 | 1970-07-02 | Aeg Elotherm Gmbh | Method and circuit arrangement for short-circuit shutdown of devices for electrochemical material removal |
-
1973
- 1973-07-03 DE DE19732333840 patent/DE2333840C3/en not_active Expired
- 1973-07-04 GB GB3183573A patent/GB1415941A/en not_active Expired
- 1973-07-05 IT IT2623073A patent/IT990962B/en active
- 1973-07-05 CH CH992273A patent/CH588569A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2333840A1 (en) | 1974-01-10 |
| IT990962B (en) | 1975-07-10 |
| DE2333840C3 (en) | 1981-11-12 |
| DE2333840B2 (en) | 1981-02-12 |
| CH588569A5 (en) | 1977-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |