CN101941114B - Plasma arc initiating device - Google Patents
Plasma arc initiating device Download PDFInfo
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- CN101941114B CN101941114B CN2010102663453A CN201010266345A CN101941114B CN 101941114 B CN101941114 B CN 101941114B CN 2010102663453 A CN2010102663453 A CN 2010102663453A CN 201010266345 A CN201010266345 A CN 201010266345A CN 101941114 B CN101941114 B CN 101941114B
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Abstract
The invention relates to a plasma arc initiating device, consisting of a main contactor, a main transformer, a wave chopper, a pulse arc initiating circuit, a high frequency starting circuit, an arc initiating relay, an inductance approach switch, an arc initiating resistor, an inductor, a resistor and a cutting torch, wherein two ends of the main transformer are respectively connected to the main contactor and the input end of the wave chopper, two output ends of the wave chopper are respectively connected to the inductor and the resistor, the pulse arc initiating circuit and the arc initiating resistor are connected in series and connected between the other end of the inductor and the other end of the resistor, the pulse arc initiating circuit and the high frequency starting circuit are connected in parallel, the arc initiating relay is connected between the pulse arc initiating circuit and the high frequency starting circuit, two ends of the high frequency starting circuit are respectively connected with two ends of the cutting torch, and the other end of the inductor is connected with a work-piece to be processed through the inductance approach switch. The invention has the advantages of small size, simple structure, long arc initiating continuous time, long service life, low failure rate and stability and reliability.
Description
Technical field
The present invention relates to CUT, relate in particular to the arc initiation device that is used for the electric arc generation in the CUT and continues.
Background technology
Air plasma arc cutting is the plasma arc bundle that relies on high temperature and high speed, melts the workpiece part metals and evaporation, and the matrix that blows off, a kind of cutting method of formation joint-cutting along with moving of plasma arc cutting torch.Because the temperature of its arc bundle is higher than the fusing point of present most metal and oxide thereof far away, so can cut most materials.The air plasma arc cutting has been widely used in the plate cutting in the productions such as automobile, rolling stock, chemical industry, boats and ships, machine room, ventilation, environmental protection at present.
The plasma arc initiation device is to be used for the device that electric arc produces and continues in the CUT.Traditional plasma arc initiation device is made up of each apportion element; These apportion element costs are expensive; Fault rate is high, as easy as rolling off a log damage in the process that produces high-frequency and high-voltage, so the fault rate of plasma arc initiation device will account for 80% of whole CUT fault rate.Device such as high frequency transformer, high frequency capacitance is in short-circuit condition in producing the process of high-frequency and high-voltage, electric current is very big, so service life is short, arcing time factor is low, and striking is no more than 5 minutes continuous time.And each apportion element is heavy, and whole arc initiation device volume is big, complex structure, causes difficulty for maintenance and user's normal use.
Summary of the invention
To the above-mentioned deficiency of existing plasma arc initiation device, the applicant improves through research, and another kind of striking length continuous time, long service life, fault rate is low, volume is little, simple in structure, reliable and stable plasma arc initiation device are provided.
Technical scheme of the present invention is following:
The plasma arc initiation device is made up of main contactor, main transformer, chopper, pulse arc ignition circuit, high frequency start-up circuit, striking relay, inductance approach switch, striking resistance, inductance, resistance and cutting torch; The two ends of said main transformer connect the input of main contactor and chopper respectively, and two outputs of chopper connect inductance and resistance respectively; Be connected after the series connection of pulse arc ignition circuit and striking resistance between the other end of the other end and resistance of inductance; The pulse arc ignition circuit is parallelly connected with the high frequency start-up circuit; Be connected with the striking relay between pulse arc ignition circuit and the high frequency start-up circuit, the two ends of high frequency start-up circuit are connected with the two ends of cutting torch respectively; The other end of inductance is connected with workpiece to be processed through inductance approach switch.
Its further technical scheme is: be connected with current divider resistance between said inductance and the striking resistance.
Useful technique effect of the present invention is:
The present invention is made up of main contactor, main transformer, chopper, pulse arc ignition circuit, high frequency start-up circuit, striking relay, inductance approach switch, striking resistance, inductance, resistance and cutting torch; Volume is little, simple in structure, reliable and stable, and striking length continuous time, long service life, fault rate are low.
Description of drawings
Fig. 1 is a structure chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is specified through embodiment.
As shown in Figure 1, the present invention is made up of main contactor 1, main transformer 2, chopper 3, pulse arc ignition circuit 4, high frequency start-up circuit 5, striking relay 6, inductance approach switch 7, striking resistance 8, inductance 9, resistance 10 and cutting torch 11.The two ends of main transformer 2 connect the input of main contactor 1 and chopper 3 respectively, and two outputs of chopper 3 connect inductance 9 and resistance 10 respectively, and chopper 3 is used for producing the direct current that cutting is used.Be connected after 8 series connection of pulse arc ignition circuit 4 and striking resistance between the other end of the other end and resistance 10 of inductance 9, pulse arc ignition circuit 4 is used for the output current maintenance when high frequency produces.Be connected with current divider resistance 13 between inductance 9 and the striking resistance 8, be used to measure electric current.Pulse arc ignition circuit 4 is parallelly connected with high frequency start-up circuit 5; Be connected with striking relay 6 between pulse arc ignition circuit 4 and the high frequency start-up circuit 5; High frequency start-up circuit 5 is used to produce the high-frequency and high-voltage alternating current, and (present embodiment is 10～15KV/AC, thereby 2MHz) begins to produce plasma arc.The two ends of high frequency start-up circuit 5 are connected with the two ends of cutting torch 11 respectively.The other end of inductance 9 is connected with workpiece 12 to be processed through inductance approach switch 7.
The course of work of the present invention is following:
(1) flows in advance
A. when receiving enabling signal, main contactor 1 adhesive, three phase mains gives main transformer 2 power supplies through main contactor 1, and main transformer 2 secondary through behind the chopper 3 forms the dc source that is suitable for plasma arc cutting at the output of chopper 3.
B. the preparatory gas body of plasma at first flows out from the nozzle of cutting torch 11, has just set up the dc source that is suitable for plasma arc cutting between electrode of cutting torch 11 (negative pole) and the workpiece (positive pole).
C. pulse arc ignition circuit 4 chargings.
(2) striking
A. striking relay 6 closures, high frequency start-up circuit 5 is started working, and produces the required high-frequency and high-voltage of striking, about about 1～3S of striking time.
B. when high frequency produced, the plasma arc striking was successful, and 4 discharges of pulse arc ignition circuit come stabilizing circuit voltage, and voltage reduces extinguish arcs automatically on the high frequency start-up circuit 5.
(3) cut mode
A. the electric arc contact workpiece 12, and inductance approach switch 7 produces low level, an arc transfer then after detecting electric current.
B. high frequency start-up circuit 5 quits work, and striking relay 6 breaks off.
C. air-flow slowly increases up to the pressure that reaches setting.The plasma arc bundle of ejection high temperature and high speed in cutting torch 11 nozzles with the local fusing rapidly of workpiece, and blows away molten metal with high velocity air simultaneously, and forms narrow otch, accomplishes cutting process.Cutting finishes, and plasma arc extinguishes.
Each components and parts described in the present embodiment are prior art, can adopt the commercial goods.
Above-described only is preferred implementation of the present invention, the invention is not restricted to above embodiment.Be appreciated that those skilled in the art under the prerequisite that does not break away from spirit of the present invention and design, can make other improvement and variation.
Claims (2)
1. a plasma arc initiation device is characterized in that being made up of main contactor (1), main transformer (2), chopper (3), pulse arc ignition circuit (4), high frequency start-up circuit (5), striking relay (6), inductance approach switch (7), striking resistance (8), inductance (9), resistance (10) and cutting torch (11); The two ends of said main transformer (2) connect the input of main contactor (1) and chopper (3) respectively, and two outputs of chopper (3) connect inductance (9) and resistance (10) respectively; Be connected after the series connection of pulse arc ignition circuit (4) and striking resistance (8) between the other end of the other end and resistance (10) of inductance (9); Pulse arc ignition circuit (4) is parallelly connected with high frequency start-up circuit (5); Be connected with striking relay (6) between pulse arc ignition circuit (4) and the high frequency start-up circuit (5), the two ends of high frequency start-up circuit (5) are connected with the two ends of cutting torch (11) respectively; The other end of inductance (9) is connected with workpiece (12) to be processed through inductance approach switch (7).
2. according to the said plasma arc initiation device of claim 1, it is characterized in that, be connected with current divider resistance (13) between said inductance (9) and the striking resistance (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102663453A CN101941114B (en) | 2010-08-27 | 2010-08-27 | Plasma arc initiating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102663453A CN101941114B (en) | 2010-08-27 | 2010-08-27 | Plasma arc initiating device |
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| Publication Number | Publication Date |
|---|---|
| CN101941114A CN101941114A (en) | 2011-01-12 |
| CN101941114B true CN101941114B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102663453A Active CN101941114B (en) | 2010-08-27 | 2010-08-27 | Plasma arc initiating device |
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| Country | Link |
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| CN (1) | CN101941114B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350273A (en) * | 2013-06-18 | 2013-10-16 | 嘉兴力德数控科技有限公司 | Arc strike starting circuit of plasma cutting machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7208925A (en) * | 1971-08-16 | 1973-02-20 | ||
| CN2463097Y (en) * | 2001-02-16 | 2001-12-05 | 唐玉贵 | Multi-functional intelligent welding/cutting inverter |
| CN1369348A (en) * | 2001-02-16 | 2002-09-18 | 唐玉贵 | Intelligent multifunctional inverse-conversion power supply for cutting/welding |
| CN201776554U (en) * | 2010-08-27 | 2011-03-30 | 无锡华联科技集团有限公司 | Plasma arc striking device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2582950B2 (en) * | 1991-04-23 | 1997-02-19 | 株式会社日立製作所 | Plasma equipment |
-
2010
- 2010-08-27 CN CN2010102663453A patent/CN101941114B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7208925A (en) * | 1971-08-16 | 1973-02-20 | ||
| CN2463097Y (en) * | 2001-02-16 | 2001-12-05 | 唐玉贵 | Multi-functional intelligent welding/cutting inverter |
| CN1369348A (en) * | 2001-02-16 | 2002-09-18 | 唐玉贵 | Intelligent multifunctional inverse-conversion power supply for cutting/welding |
| CN201776554U (en) * | 2010-08-27 | 2011-03-30 | 无锡华联科技集团有限公司 | Plasma arc striking device |
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| Publication number | Publication date |
|---|---|
| CN101941114A (en) | 2011-01-12 |
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