JPS5744469A - Device for preventing damage of torch for plasma arc - Google Patents
Device for preventing damage of torch for plasma arcInfo
- Publication number
- JPS5744469A JPS5744469A JP12007380A JP12007380A JPS5744469A JP S5744469 A JPS5744469 A JP S5744469A JP 12007380 A JP12007380 A JP 12007380A JP 12007380 A JP12007380 A JP 12007380A JP S5744469 A JPS5744469 A JP S5744469A
- Authority
- JP
- Japan
- Prior art keywords
- torch
- power source
- base metals
- electric current
- plasma arc
- 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.)
- Granted
Links
- 239000010953 base metal Substances 0.000 abstract 4
- 238000013459 approach Methods 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000002159 abnormal effect Effects 0.000 abstract 1
Landscapes
- Arc Welding Control (AREA)
Abstract
PURPOSE: To prevent damaging and breaking of a torch owing to the generation of series arcs by detecting the abnormal approach of the torch to base metals when it occurs and interrupting electric power to be supplied between the electrode of the torch and the base metals.
CONSTITUTION: Electric power is supplied between base metals 4 and the electrode 5 of a torch T by an electric power source 2 for plasma arc, whereby a plasma arc PA is generated. The output electric current of the power source 2 is detected by an electric current detector 8. A control device 9 compares this detection signal with a reference value, and the phase of the control element TH of the power source 2 is controlled by the signal from the device 9. The constant electric current characteristics setting the output current of the power source 2 are obtained by this feedback controlling. Further, voltage is detected by a voltage comparator 11 and this and the reference voltage varied in accordance with the set current are compared. When the torch T approaches abnormally to the base metals 4 and the detection voltages drops lower than the reference voltage, an ouput is emitted to the power source 2, whereby the electric current is interrupted.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12007380A JPS6043831B2 (en) | 1980-08-30 | 1980-08-30 | Damage prevention device for plasma arc torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12007380A JPS6043831B2 (en) | 1980-08-30 | 1980-08-30 | Damage prevention device for plasma arc torch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5744469A true JPS5744469A (en) | 1982-03-12 |
| JPS6043831B2 JPS6043831B2 (en) | 1985-09-30 |
Family
ID=14777224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12007380A Expired JPS6043831B2 (en) | 1980-08-30 | 1980-08-30 | Damage prevention device for plasma arc torch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6043831B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62267080A (en) * | 1985-09-04 | 1987-11-19 | サ−マル・ダイナミクス・コ−ポレ−シヨン | Plasma torch interrupting circuit |
| WO1991016170A1 (en) * | 1990-04-17 | 1991-10-31 | Kabushiki Kaisha Komatsu Seisakusho | Standoff control method and apparatus for plasma cutting machine |
| US5225658A (en) * | 1988-03-24 | 1993-07-06 | Kabushiki Kaisha Komatsu Seisakusho | Stopping a plasma arc cutter upon completion of cutting |
| US5326955A (en) * | 1990-04-17 | 1994-07-05 | Kabushiki Kaisha Komatsu Seisakusho | Standoff control method and apparatus for plasma cutting machine |
| EP2594119B1 (en) | 2010-07-16 | 2016-03-23 | Hypertherm, Inc | Failure event detection in a plasma arc torch |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309111A (en) * | 1989-05-23 | 1990-12-25 | Nasu Tooa Kk | Construction of stack |
-
1980
- 1980-08-30 JP JP12007380A patent/JPS6043831B2/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62267080A (en) * | 1985-09-04 | 1987-11-19 | サ−マル・ダイナミクス・コ−ポレ−シヨン | Plasma torch interrupting circuit |
| US5225658A (en) * | 1988-03-24 | 1993-07-06 | Kabushiki Kaisha Komatsu Seisakusho | Stopping a plasma arc cutter upon completion of cutting |
| WO1991016170A1 (en) * | 1990-04-17 | 1991-10-31 | Kabushiki Kaisha Komatsu Seisakusho | Standoff control method and apparatus for plasma cutting machine |
| US5326955A (en) * | 1990-04-17 | 1994-07-05 | Kabushiki Kaisha Komatsu Seisakusho | Standoff control method and apparatus for plasma cutting machine |
| EP2594119B1 (en) | 2010-07-16 | 2016-03-23 | Hypertherm, Inc | Failure event detection in a plasma arc torch |
| US10039178B2 (en) | 2010-07-16 | 2018-07-31 | Hypertherm, Inc. | Failure event detection in a plasma arc torch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6043831B2 (en) | 1985-09-30 |
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