JPS5464054A - Plasma accidental fire monitoring device - Google Patents
Plasma accidental fire monitoring deviceInfo
- Publication number
- JPS5464054A JPS5464054A JP13023377A JP13023377A JPS5464054A JP S5464054 A JPS5464054 A JP S5464054A JP 13023377 A JP13023377 A JP 13023377A JP 13023377 A JP13023377 A JP 13023377A JP S5464054 A JPS5464054 A JP S5464054A
- Authority
- JP
- Japan
- Prior art keywords
- plasma
- torch
- accidental fire
- current
- shunt
- 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.)
- Pending
Links
Landscapes
- Plasma Technology (AREA)
Abstract
PURPOSE: To permit the easy monitoring of plasma accidental fire by the procedure in which the locus of plasma torch is displayed at the same time as the movement of plasma torch and the indication of the locus of torch is stopped by detecting an abrupt change on the occasion of accidental fire in arc current, etc.
CONSTITUTION: The arc current sent from the arc current rectifier 14 to the high frequency generator 16 is detected by the shunt 19 and then incorporated into the control module 20 to control the sequence of plasma flow and acr current..And, the current divided by the shunt 24 is amplified to excite the relay and the contact 27 is closed. When arc current is rapidly reduced by an accidental fire, the current incorporated into the shunt 24 is reduced to open the contact 26, and thus a hold signal is put in the control portion 5. Thus, the operation o the plasma torch 12 is stopped and at the same time the indication of the displayer 32 indicating the movement of the torch 12 is stopped, so that the condition of accidental fire in torch can be monitored from a distant place.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13023377A JPS5464054A (en) | 1977-11-01 | 1977-11-01 | Plasma accidental fire monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13023377A JPS5464054A (en) | 1977-11-01 | 1977-11-01 | Plasma accidental fire monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5464054A true JPS5464054A (en) | 1979-05-23 |
Family
ID=15029285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13023377A Pending JPS5464054A (en) | 1977-11-01 | 1977-11-01 | Plasma accidental fire monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5464054A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999007511A1 (en) * | 1997-08-08 | 1999-02-18 | Kabushiki Kaisha Yaskawa Denki | Arc welding monitoring device |
-
1977
- 1977-11-01 JP JP13023377A patent/JPS5464054A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999007511A1 (en) * | 1997-08-08 | 1999-02-18 | Kabushiki Kaisha Yaskawa Denki | Arc welding monitoring device |
| US6271500B1 (en) | 1997-08-08 | 2001-08-07 | Kabushiki Kaisha Yaskawa Denki | Arc welding monitoring device |
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