GB1120292A - Control arrangement in electro-erosive apparatus - Google Patents
Control arrangement in electro-erosive apparatusInfo
- Publication number
- GB1120292A GB1120292A GB41840/65A GB4184065A GB1120292A GB 1120292 A GB1120292 A GB 1120292A GB 41840/65 A GB41840/65 A GB 41840/65A GB 4184065 A GB4184065 A GB 4184065A GB 1120292 A GB1120292 A GB 1120292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- electrode
- pulse
- contacts
- relays
- 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
- B23H1/024—Detection of, and response to, abnormal gap conditions, e.g. short circuits
-
- 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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/18—Electric circuits specially adapted therefor, e.g. power supply for maintaining or controlling the desired spacing between electrode and workpiece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
1,120,292. Spark erosion. INDUSTRIELLE ELEKTRONIK AGIE LOSONE BEI LOCARNO, A.G. FUR. 1 Oct., 1965 [15 July, 1965], No. 41840/65. Heading B3V. [Also in Divisions G3 and H2] Electro-erosion apparatus is supplied from a pulse-generator (not shown) over a transistor switch TR1 and the working current passes through a resistor 11 across which is connected a circuit 2 including a relay 25 which operates to close contacts 26, 21 when a capacitor 24 is fully charged. Thus if an arc occurs in the working gap between the electrode 106 and a workpiece 107 a relatively large current passes and capacitor 24 charges up and operates relay 25; at the same time the electrode feed motor M, under the control of a regulating device 5, reverses to retract the electrode 106 from the workpiece, the armature voltage of the motor then being such that a signal of positive potential is produced at point 508. This signal is applied over transistors TR2, TR3, TR4 in a circuit 4 to operate a relay 45 whereby contacts 43 and 44 are closed. With both relays 25 and 45 operated, an A.C. supply on lines 102, 103 is connected over contacts 21, 26, contacts 43, 44, a diode 36 and a valve 39 associated with a time-delay circuit 37, 38, to operate a relay 310 whereby the supply to the electro-erosion apparatus is interrupted by way of contact 33, a fault indicator 311 is energized by way of contact 34 and a device 6 is operated by way of contact 35. The device 6 acts to charge one or more of the pulse generator output parameters, e.g. pulse frequency, pulse amplitude, or pulse width so that when the system automatically starts up again, i.e. when relays 25 and 45 fall off, arcing is less likely to occur. Electric switches or transductors may replace the relays 25, 45 and 310. Thus, the protective system responds only when the arc persists and the electrode is being retracted, and the Specification describes how this obviates unnecessary actuation under certain operating conditions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH996865A CH438519A (en) | 1965-07-15 | 1965-07-15 | Spark erosion device with reversible electrode feed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1120292A true GB1120292A (en) | 1968-07-17 |
Family
ID=4357655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB41840/65A Expired GB1120292A (en) | 1965-07-15 | 1965-10-01 | Control arrangement in electro-erosive apparatus |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3439146A (en) |
| AT (1) | AT258431B (en) |
| CH (1) | CH438519A (en) |
| DE (1) | DE1565388C3 (en) |
| GB (1) | GB1120292A (en) |
| SE (1) | SE340211B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3597570A (en) * | 1968-05-27 | 1971-08-03 | Mitsubishi Electric Corp | Device for detecting sustained arcing across electrospark machining gaps |
| FR2063115A1 (en) * | 1969-04-02 | 1971-07-09 | Inoue K | Servo-system for electro-machining |
| US3654420A (en) * | 1970-08-14 | 1972-04-04 | Mitsubishi Electric Corp | Apparatus for shaping a workpiece by electrical discharge with detection means for stopping the shaping operation under abnormal conditions |
| DE3134443C2 (en) * | 1980-01-22 | 1993-12-16 | Mitsubishi Electric Corp | Device for the electroerosive machining of a workpiece |
| DE3323609A1 (en) * | 1982-06-30 | 1984-01-12 | Mitsubishi Denki K.K., Tokyo | ELECTRICAL UNLOADING MACHINE |
| US4628171A (en) * | 1985-01-11 | 1986-12-09 | Port City Machine & Tool Company | Mechanical feed EDM machine for making threaded and nonthreaded bores |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL298679A (en) * | 1963-02-28 | 1900-01-01 | ||
| US3288693A (en) * | 1963-07-23 | 1966-11-29 | Exnii Metallorezhushtchikh Sta | Method for automatically controlling electrode device feeding in electric erosion machines and an arrangement to carry out this method |
-
1965
- 1965-07-15 CH CH996865A patent/CH438519A/en unknown
- 1965-08-20 AT AT769365A patent/AT258431B/en active
- 1965-10-01 GB GB41840/65A patent/GB1120292A/en not_active Expired
-
1966
- 1966-06-24 DE DE1565388A patent/DE1565388C3/en not_active Expired
- 1966-06-27 US US560503A patent/US3439146A/en not_active Expired - Lifetime
- 1966-07-12 SE SE09496/66A patent/SE340211B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1565388C3 (en) | 1975-11-06 |
| DE1565388B2 (en) | 1975-03-06 |
| US3439146A (en) | 1969-04-15 |
| DE1565388A1 (en) | 1970-03-19 |
| AT258431B (en) | 1967-11-27 |
| SE340211B (en) | 1971-11-08 |
| CH438519A (en) | 1967-06-30 |
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