CN101259564A - Double-airflow non-high-frequency arc strike control device for plasma cutting machine - Google Patents
Double-airflow non-high-frequency arc strike control device for plasma cutting machine Download PDFInfo
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- CN101259564A CN101259564A CNA2008100240673A CN200810024067A CN101259564A CN 101259564 A CN101259564 A CN 101259564A CN A2008100240673 A CNA2008100240673 A CN A2008100240673A CN 200810024067 A CN200810024067 A CN 200810024067A CN 101259564 A CN101259564 A CN 101259564A
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- airflow
- flow
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- control device
- frequency arc
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Abstract
The invention discloses a dual airflow non-high-frequency arc starting control device for a plasma cutting machine, comprising a non-high-frequency cutting gun, a airflow providing system and a current control switch of a guide circuit, a time division airflow device is arranged on the airflow providing system, the time division gas flow device has two valves which are connected in parallel, one is a big gas valve with a larger flow rate and the other is a small gas valve with a smaller flow rate. The dual airflow non-high-frequency arc starting device applies the big and the small gas valves which are in the parallel connection state to control the time division airflow of the cutting gun, at the same time, IGBT K50T60 is taken as the current control switch of the guide circuit, which can obtain the precise current control (PCB is arranged at 18 to 20A) and rapid response; furthermore, when the cutting is finished, a nozzle of an electrode is cooled by the small gas, and a small arc can be re-started at any time.
Description
Technical field:
The present invention relates to a kind of CUT arc strike control device.
Background technology:
At present, the striking of general CUT must rely on HF (3000V～10000V, the high-frequency impulse of 100～200KHZ) the cutting plasma arc that ignites, its fatal problem is exactly easily electronic equipment to be produced stronger electromagnetic interference, therefore, its use is restricted, particularly with the supporting use of CNC, be very easy to disturb the operate as normal of control computer, and digital cutting is the fast and very large production technology of application quantity of development at present, utilize two air-flows to control non-high frequency technique, address the above problem effectively, will reduce the electromagnetic interference of CNC greatly.Because the special construction principle of non-high frequency burning torch, its arc process is to rely on gas to push electrode and nozzle open non-short-circuit condition by short-circuit condition, and form (drawing) electric arc by guiding (PILOT) circuital current between them, thereby form PILOT ARC (pilot arc is little arc); When the burning torch nozzle form again near workpiece and workpiece between the cutting minor arc, arc process is very responsive to the control of air-flow and striking electric current, crossing air flow and too little current all can can't the starting the arc or blow out electric arc, otherwise can damage electrode nozzle even rifle body fast and cause and can't normally cut.
Summary of the invention:
The object of the present invention is to provide a kind of rational in infrastructure, good working effect be used for the CUT double-airflow non-high-frequency arc strike control device.
Technical solution of the present invention is:
A kind of CUT double-airflow non-high-frequency arc strike control device that is used for, comprise that non-high frequency type burning torch, air-flow provide system, steering circuit current-controlled switch, it is characterized in that: air-flow provides the timesharing airflow apparatus is set in the system, the timesharing airflow apparatus is the valve of two parallel connections, one is the bigger atmos-valve of flow, and another is the less little air valve of flow.
The steering circuit current-controlled switch is IGBT K50T60.The flow of the atmos-valve that described flow is bigger is 30～100L/ minute, and the flow of the little air valve that flow is less is 5～15L/ minute.The valve of two parallel connections is consubstantiality bivalve forms.
The present invention uses the big or small air valve of state in parallel to control the timesharing air-flow of burning torch, simultaneously, by using IGBT K50T60 as the steering circuit current-controlled switch, (PCB is arranged on 18～20A) and fast reaction can to obtain precise current control, and when cutting finishes, with stingy cooling electrode nozzle, and can restart little arc at any time.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples:
Accompanying drawing is the configuration diagram of one embodiment of the invention.
The specific embodiment:
A kind of CUT double-airflow non-high-frequency arc strike control device that is used for, comprise that non-high frequency type burning torch 1, air-flow provide air pump 2, the steering circuit current-controlled switch 3 of system, air-flow provides the timesharing airflow apparatus is set in the system, the timesharing airflow apparatus is the valve 4,5 of two parallel connections, one is the bigger atmos-valve of flow 4, and another is the less stingy valve 5 of flow.Steering circuit current-controlled switch 3 is IGBT K50T60.The flow of the atmos-valve 4 that described flow is bigger is 30～100L/ minute, and the flow of the stingy valve 5 that flow is less is 5～15L/ minute.The valve of two parallel connections is consubstantiality bivalve form (promptly are arranged on the body, but work alone separately).PCB is arranged on 18～20A.Also has workpiece 6, machine output 7,8 among the figure.
Claims (4)
1, a kind of CUT double-airflow non-high-frequency arc strike control device that is used for, comprise that non-high frequency type burning torch, air-flow provide system, steering circuit current-controlled switch, it is characterized in that: air-flow provides the timesharing airflow apparatus is set in the system, the timesharing airflow apparatus is the valve of two parallel connections, one is the bigger atmos-valve of flow, and another is the less little air valve of flow.
2, the CUT double-airflow non-high-frequency arc strike control device that is used for according to claim 1, it is characterized in that: the steering circuit current-controlled switch is IGBT K50T60.
3, the CUT double-airflow non-high-frequency arc strike control device that is used for according to claim 1 and 2, it is characterized in that: the flow of the atmos-valve that described flow is bigger is 30～100L/ minute, the flow of the little air valve that flow is less is 5～15L/ minute.
4, the CUT double-airflow non-high-frequency arc strike control device that is used for according to claim 1 and 2 is characterized in that: the valve of two parallel connections is consubstantiality bivalve forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100240673A CN101259564A (en) | 2008-04-25 | 2008-04-25 | Double-airflow non-high-frequency arc strike control device for plasma cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100240673A CN101259564A (en) | 2008-04-25 | 2008-04-25 | Double-airflow non-high-frequency arc strike control device for plasma cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101259564A true CN101259564A (en) | 2008-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100240673A Pending CN101259564A (en) | 2008-04-25 | 2008-04-25 | Double-airflow non-high-frequency arc strike control device for plasma cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101259564A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889543A (en) * | 2015-05-03 | 2015-09-09 | 北京工业大学 | Non-consumable electrode welding method with gas-electricity pulse combined effect |
| CN106001877A (en) * | 2016-07-19 | 2016-10-12 | 上海通用重工集团有限公司 | Air plasma cutting machine |
-
2008
- 2008-04-25 CN CNA2008100240673A patent/CN101259564A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889543A (en) * | 2015-05-03 | 2015-09-09 | 北京工业大学 | Non-consumable electrode welding method with gas-electricity pulse combined effect |
| CN106001877A (en) * | 2016-07-19 | 2016-10-12 | 上海通用重工集团有限公司 | Air plasma cutting machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080910 |