GB958970A - Improvements in and relating to electrolytic machining process and current generatortherefor - Google Patents
Improvements in and relating to electrolytic machining process and current generatorthereforInfo
- Publication number
- GB958970A GB958970A GB3135460A GB3135460A GB958970A GB 958970 A GB958970 A GB 958970A GB 3135460 A GB3135460 A GB 3135460A GB 3135460 A GB3135460 A GB 3135460A GB 958970 A GB958970 A GB 958970A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cutter
- voltage
- workpiece
- supply
- sept
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
- G05F1/34—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
- G05F1/38—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
958, 970. Automatic voltage control systems. ATELIERS DES CHARMILLES S.A. Sept. 12, 1960 [Sept.12, 1959], No. 31354/60. Heading G2R. The supply system for an electrolytic cutter maintains constant the average voltage between the cutter and the workpiece, the time constants of the measuring circuit being chosen to reduce voltage surges. Direct current is supplied by transformer 1 and rectifier 10, 11 to the rotating cutter 12, and workpiece 13,which latter forms the anode. A portion of the cutter/workpiece voltage, tapped off coarse and fine potential dividers 19 and P, and a reference voltage obtained across a Zener diode 21 are applied to a transistor comparator T1, T2. Any unbalance controls a power transistor T3 which controls a saturable reactor L1 L2 in series with the supply to the transformer 1. The saturable reactor may be replaced by paralleled power transistors on the D.C. side of the supply. The cutter/workpiece voltage signal charges a capacitor C1 through parts of the potential divider resistors R7 when the signal is greater than the reference voltage. The time constant is made slightly less than the minimum period of uninterrupted cutting. The cutting is frequently interrupted by short circuits. The diode 20 prevents the capacitor C1 from discharging through R7 &c., during a short circuit and so it discharges through R11. The time constant of Cl,R11 is made longer than the maximum period of short circuit so that the system does not respond to changes in cutter/- workpiece voltage due to short circuits.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH7816859 | 1959-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB958970A true GB958970A (en) | 1964-05-27 |
Family
ID=4536273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3135460A Expired GB958970A (en) | 1959-09-12 | 1960-09-12 | Improvements in and relating to electrolytic machining process and current generatortherefor |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH357815A (en) |
| DE (1) | DE1188228B (en) |
| GB (1) | GB958970A (en) |
| NL (1) | NL255267A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2552597B1 (en) * | 1983-09-23 | 1989-12-29 | Degremont Sa | ELECTRIC POWER SUPPLY DEVICE FOR OZONE GENERATOR |
-
0
- NL NL255267D patent/NL255267A/xx unknown
-
1959
- 1959-09-12 CH CH357815D patent/CH357815A/en unknown
-
1960
- 1960-08-08 DE DEA35307A patent/DE1188228B/en active Pending
- 1960-09-12 GB GB3135460A patent/GB958970A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1188228B (en) | 1965-03-04 |
| CH357815A (en) | 1961-10-31 |
| NL255267A (en) |
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