GB944613A - Improvements in electrolytic machining apparatus - Google Patents
Improvements in electrolytic machining apparatusInfo
- Publication number
- GB944613A GB944613A GB4056360A GB4056360A GB944613A GB 944613 A GB944613 A GB 944613A GB 4056360 A GB4056360 A GB 4056360A GB 4056360 A GB4056360 A GB 4056360A GB 944613 A GB944613 A GB 944613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- workpiece
- relay
- supply
- contacts
- 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)
Abstract
In an electrolytic machining apparatus, a control system is effective to stop relative movement between an electrode and a workpiece and to cut-off the D.C. supply to the electrode and workpiece in response to minor transient changes in the D.C. supply due to short circuiting between the electrode and workpiece, the control system being substantially insensitive to a gradual change in, or steady state conditions of, the D.C. supply. In the arrangement shown, the control grid of a gas-filled valve 2D21 is normally biased so that the valve is non-conducting. This control grid is connected through a high-pass filter C3, C2, L1, a potentiometer R1, a capacitor C1 and conductors 63 to the electrode and workpiece. Under transient conditions due to a spark between the electrode and workpiece, a signal is applied to the control grid causing the valve to conduct. A relay RY6 is now energized and closes its contacts A to cause the energizing of a relay RY5, a signal lamp S and a thermal delay relay TDR. The relay RY5 closes contacts E to complete a holding circuit for itself, opens contacts B to cut-off the supply to the relay RY6 and the valve, and closes contacts C <PICT:0944613/C3/1> and D to cause the stopping of the movement between the electrode and workpiece, e.g. by causing the de-energizing of a drive motor (not shown) and to cause the interruption of the D.C. supply to the electrode and workpiece. After a short delay, the relay TDR opens its contacts F to interrupt the holding circuit for the relay RY5 so that the control system automatically returns to normal and permits the manual operation of a conventional starting system (not shown) to re-start the apparatus after the fault condition has been removed. The control system described also functions when the D.C. supply to the electrode and workpiece fails, to prevent mechanical damage to the electrode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86324659A | 1959-12-31 | 1959-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB944613A true GB944613A (en) | 1963-12-18 |
Family
ID=25340670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4056360A Expired GB944613A (en) | 1959-12-31 | 1960-11-25 | Improvements in electrolytic machining apparatus |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE598663A (en) |
| CH (1) | CH404017A (en) |
| GB (1) | GB944613A (en) |
| NL (1) | NL259072A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2944505A1 (en) * | 1979-11-03 | 1981-05-14 | Aeg-Elotherm Gmbh, 5630 Remscheid | METHOD FOR ELECTROLYTIC METAL WORKING, DEVICE FOR IMPLEMENTING THE METHOD AND DEVICE FOR ELECTROLYTIC METAL WORKING |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5836029U (en) * | 1981-09-03 | 1983-03-09 | 株式会社ソディック | electrical processing equipment |
-
0
- NL NL259072D patent/NL259072A/xx unknown
-
1960
- 1960-11-25 GB GB4056360A patent/GB944613A/en not_active Expired
- 1960-12-13 CH CH1394860A patent/CH404017A/en unknown
- 1960-12-29 BE BE598663A patent/BE598663A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2944505A1 (en) * | 1979-11-03 | 1981-05-14 | Aeg-Elotherm Gmbh, 5630 Remscheid | METHOD FOR ELECTROLYTIC METAL WORKING, DEVICE FOR IMPLEMENTING THE METHOD AND DEVICE FOR ELECTROLYTIC METAL WORKING |
Also Published As
| Publication number | Publication date |
|---|---|
| CH404017A (en) | 1965-12-15 |
| BE598663A (en) | 1961-06-29 |
| NL259072A (en) |
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