CN104439664A - Struck arc and cutting arc transfer circuit for plasma cutting machine - Google Patents
Struck arc and cutting arc transfer circuit for plasma cutting machine Download PDFInfo
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- CN104439664A CN104439664A CN201410796978.3A CN201410796978A CN104439664A CN 104439664 A CN104439664 A CN 104439664A CN 201410796978 A CN201410796978 A CN 201410796978A CN 104439664 A CN104439664 A CN 104439664A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/006—Control circuits therefor
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a struck arc and cutting arc transfer circuit for a plasma cutting machine. The transfer circuit is applied to the plasma cutting machine. One end of an RC parallel circuit of the transfer circuit is connected with a first terminal, and the other end of the RC parallel circuit is connected with a first contactor. The cathode of a first power diode is connected with the first contactor, the anode of the first power diode is connected with a fifth resistor, the other end of the fifth resistor is connected with one end of a fourth resistor and then connected with a second terminal, a fourth terminal and a second contactor, and the other end of the fourth resistor is connected with the first contactor. The anode of a second power diode is connected with the first contactor, the cathode of the second power diode is connected with one end of a sixth resistor, and the other end of the sixth resistor is connected with a starting circuit. The second contactor is further connected with a fifth terminal and the starting circuit. A filter circuit is connected with third terminal, the fourth terminal, the fifth terminal and a sixth terminal. The struck arc and cutting arc transfer circuit is simple in structure, reliable in switching and high in anti-interference capacity.
Description
Technical field
The present invention relates to a kind of CUT striking and cut arc carry circuit, in CUT.
Background technology
The electric control system of CUT comprises the major parts such as plasma electric source apparatus, arc initiation device, air-control device, digital control system, cooling system.Arc initiation device produces pilot arc before cutting arc occurs, even if the gas between nozzle and electrode ionization occurs and produces plasma jet, this is the first step operation of cut workpiece.Arc initiation device comprises high-frequency and high-voltage arc ignition circuit or high pressure low frequency arc ignition circuit, arc voltage testing circuit, striking and cuts arc carry circuit, surge voltage absorbing circuit, stube cable etc.Arc voltage testing circuit is responsible for starting arc ignition circuit, starts cutting process.Striking and cut between arc and need to cut arc carry circuit Switching power circuit by striking.
Up to now, although the application of CUT is increasingly extensive, it is one of necessary circuits that arc carry circuit is cut in striking, as be 201020603574.5 in the patent No., name be called a kind of have in the Chinese patent of the CUT of front guide arc and cutting arc forced branch function just to have relate to.But arc carry circuit is cut in the CUT striking of prior art, there is complex structure, it is unreliable to switch, disturb the shortcomings such as large.
Summary of the invention
Technical problem to be solved by this invention overcomes deficiency of the prior art and provides the CUT striking that a kind of circuit structure is simple, switching is reliable, antijamming capability is strong to cut arc carry circuit.
The technical scheme that the present invention solves the problems of the technologies described above employing is: arc carry circuit is cut in a kind of CUT striking, it is characterized in that: comprise commutation circuit, filter circuit, start-up circuit, the first terminal, the second terminal, the 3rd terminal, the 4th terminal, Five-terminals, the 6th terminal;
Described commutation circuit comprises RC parallel circuit, the first contactor, the second contactor, the 4th resistance, the 5th resistance, the 6th resistance, the first power diode, the second power diode; RC parallel circuit one end is connected with the first terminal, and the other end is connected with the first contactor; The negative electrode of the first power diode is connected with the first contactor, anode is connected with one end of the 5th resistance, and the other end of the 5th resistance is connected with the second terminal, the 4th terminal, the second contactor after being connected with the 4th resistance one end respectively, the 4th resistance other end is connected with the first contactor; The anode of the second power diode is connected with the first contactor, and negative electrode is connected with one end of the 6th resistance, and the other end of the 6th resistance is connected with start-up circuit; Second contactor is also connected with start-up circuit with Five-terminals;
Described filter circuit is connected with the 3rd terminal, the 4th terminal, Five-terminals, the 6th terminal.
Filter circuit of the present invention comprises the 7th resistance, the 8th resistance, the 9th resistance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity; One end of described 7th resistance, the second electric capacity is connected with the 3rd terminal, and the other end is connected with the 4th terminal; One end of 8th resistance, the 3rd electric capacity is connected with the 4th terminal, and the other end is connected with Five-terminals; One end of 9th resistance, the 4th electric capacity is connected with Five-terminals, and the other end is connected with the 6th terminal.
RC parallel circuit of the present invention comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, first resistance, the second resistance, the 3rd resistance, the first Capacitance parallel connection, after in parallel, a common port is connected with the first terminal, and another common port is connected with the first contactor.
The present invention compared with prior art, tool has the following advantages and effect: can realize safely and reliably by striking to the switching of cutting arc, and striking can be absorbed and cut the interference that arc brings, there is the advantages such as structure is simple, interference rejection ability is strong, safe and reliable, with low cost, be suitable for big-and-middle-sized CUT application scenario.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention circuit theory diagrams.
Detailed description of the invention
Below in conjunction with accompanying drawing, also by embodiment, the invention will be further described.
See Fig. 1, the embodiment of the present invention comprises commutation circuit 1, start-up circuit 2, filter circuit 3, the first terminal J1, the second terminal J2, the 3rd terminal J3, the 4th terminal J4, Five-terminals J5, the 6th terminal J6.
Commutation circuit 1 is for switching power supply route and carrying out EMI suppression; Start-up circuit 2 is the circuit starting striking, belongs to auxiliary circuit; Filter circuit 3 is EMI suppression circuit.
The first terminal J1 is for connecting power cathode.Second terminal J2 is for connecting positive source.3rd terminal J3 is for connecting power cathode.4th terminal J4 is for connecting cut workpiece.Five-terminals J5 is for connecting the earth.6th terminal J6 is for connecting the casing of CUT.
Commutation circuit 1 comprises RC parallel circuit, the first contactor RL1, the second contactor RL2, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first power diode D1, the second power diode D2.
RC parallel circuit one end is connected with the first terminal J1, and the other end is connected with the first contactor RL1.RC parallel circuit comprises the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1 parallel connection, after in parallel, a common port is connected with the first terminal, and another common port is connected with No. two terminals 2 with a terminal 1 of the first contactor RL1.
The negative electrode of the first power diode D1 is connected with No. four terminals 4 of the first contactor RL1, anode is connected with one end of the 5th resistance R5, and the other end of the 5th resistance R5 is connected with No. two terminals 2 of the second terminal J2, the 4th terminal J4, the second contactor RL2 after being connected with the 4th resistance R4 one end respectively, the 4th resistance R4 other end is connected with No. three terminals 3 of the first contactor.The anode of the second power diode D2 is connected with No. six terminals 6 of the first contactor RL1, and negative electrode is connected with one end of the 6th resistance R6, and the other end of the 6th resistance R6 is connected with No. two terminal T2 of start-up circuit 2.The coil CL1 of the first contactor RL1 and the coil CL2 of the second contactor RL2 are used for being connected with supervisory controller, accept supervisory controller and control.No. six terminals 6 of the second contactor RL2 are connected with a terminal T1 of start-up circuit 2.No. five terminals 5 of the second contactor RL2 control.No. four terminals 4 of the second contactor RL2, for being connected with striking step-up transformer secondary windings one end, are connected with Five-terminals J5 simultaneously.No. three terminals 3 of the second contactor RL2 are vacant.No. five terminals 5 of the first contactor RL1 are vacant.
Filter circuit 3 comprises the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4.One end of 7th resistance R7, the second electric capacity C2 is connected with the 3rd terminal J3, and the other end is connected with the 4th terminal J4.One end of 8th resistance R8, the 3rd electric capacity C3 is connected with the 4th terminal J4, and the other end is connected with Five-terminals J5.One end of 9th resistance R9, the 4th electric capacity C4 is connected with Five-terminals J5, and the other end is connected with the 6th terminal J6.Filter circuit 3 is EMI suppression circuit.
Operation principle of the present invention is as follows:
The first terminal J1 connects power cathode, and the second terminal J2 connects positive source, and the 3rd terminal J3 connects power cathode, and the 4th terminal J4 connects cut workpiece, and Five-terminals J5 connects the earth, and the 6th terminal J6 connects the casing of CUT.In the first stage of striking, first contactor RL1 maintains normality, No. two terminals 2 that the terminal 1 of the first contactor RL1 meets No. three terminals 3, the first contactor RL1 of the first contactor RL1 connect No. five terminals 5 of the first contactor RL1,4th resistance R4 with in parallel after the first resistance R1, the second resistance R2, the 3rd resistance R3 and the first electric capacity C1 form absorption circuit, absorb the surge voltage between the second terminal J2 and the first terminal J1.Second contactor RL2 departs from normality, a terminal 1 of the second contactor RL2 connects No. four terminals 4 of the second contactor RL2, No. two terminals 2 of the second contactor RL2 connect No. six terminals 6 of the second contactor RL2, second terminal J2 voltage is accessed start-up circuit 2 by a terminal T1 of start-up circuit 2, and flow out from No. two terminal T2 of start-up circuit 2, be connected with striking step-up transformer secondary windings with No. four terminals 4 of the second contactor RL2 by a terminal 1 of the second contactor RL2, carry out voltage superposition, produce high pressure, at this moment the voltage being superimposed with high-voltage alternating is just applied between nozzle of cutting torch and electrode, carry out striking.At the end of striking, the second contactor RL2 returns to normal, and No. two terminals 2 that the terminal 1 of the second contactor RL2 meets No. three terminals 3, the second contactor RL2 of the second contactor RL2 connect No. five terminals 5 of the second contactor RL2, depart from striking.First contactor RL1 departs from normality, No. two terminals 2 that the terminal 1 of the first contactor RL1 meets No. four terminals 4, the first contactor RL1 of the first contactor RL1 connect No. six terminals 6 of the first contactor RL1, and positive source is directly connected with cut workpiece with the 4th terminal J4 by the second terminal J2.Second terminal J2 be connected to the 5th resistance R5, the first power diode D1 between the first terminal J1, in parallel after the first resistance R1, the second resistance R2, the 3rd resistance R3 and the first electric capacity C1, form unidirectional absorption circuit.In whole striking with cut the arc stage, filter circuit 3 suppresses the interference voltage between the 3rd terminal J3, the 4th terminal J4, Five-terminals J5, the 6th terminal J6, prevents interference voltage from conducting to periphery.
Above content described in this description is only to structure example of the present invention explanation.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (3)
1. an arc carry circuit is cut in CUT striking, it is characterized in that: comprise commutation circuit, filter circuit, start-up circuit, the first terminal, the second terminal, the 3rd terminal, the 4th terminal, Five-terminals, the 6th terminal;
Described commutation circuit comprises RC parallel circuit, the first contactor, the second contactor, the 4th resistance, the 5th resistance, the 6th resistance, the first power diode, the second power diode; RC parallel circuit one end is connected with the first terminal, and the other end is connected with the first contactor; The negative electrode of the first power diode is connected with the first contactor, anode is connected with one end of the 5th resistance, and the other end of the 5th resistance is connected with the second terminal, the 4th terminal, the second contactor after being connected with the 4th resistance one end respectively, the 4th resistance other end is connected with the first contactor; The anode of the second power diode is connected with the first contactor, and negative electrode is connected with one end of the 6th resistance, and the other end of the 6th resistance is connected with start-up circuit; Second contactor is also connected with start-up circuit with Five-terminals;
Described filter circuit is connected with the 3rd terminal, the 4th terminal, Five-terminals, the 6th terminal.
2. arc carry circuit is cut in CUT striking according to claim 1, it is characterized in that: described filter circuit comprises the 7th resistance, the 8th resistance, the 9th resistance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity; One end of described 7th resistance, the second electric capacity is connected with the 3rd terminal, and the other end is connected with the 4th terminal; One end of 8th resistance, the 3rd electric capacity is connected with the 4th terminal, and the other end is connected with Five-terminals; One end of 9th resistance, the 4th electric capacity is connected with Five-terminals, and the other end is connected with the 6th terminal.
3. arc carry circuit is cut in CUT striking according to claim 1, it is characterized in that: described RC parallel circuit comprises the first resistance, the second resistance, the 3rd resistance, the first electric capacity, first resistance, the second resistance, the 3rd resistance, the first Capacitance parallel connection, after in parallel, a common port is connected with the first terminal, and another common port is connected with the first contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796978.3A CN104439664B (en) | 2014-12-19 | 2014-12-19 | Arc carry circuit is cut in CUT striking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796978.3A CN104439664B (en) | 2014-12-19 | 2014-12-19 | Arc carry circuit is cut in CUT striking |
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| Publication Number | Publication Date |
|---|---|
| CN104439664A true CN104439664A (en) | 2015-03-25 |
| CN104439664B CN104439664B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410796978.3A Active CN104439664B (en) | 2014-12-19 | 2014-12-19 | Arc carry circuit is cut in CUT striking |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112471A (en) * | 1994-05-27 | 1995-11-29 | 常州泛洋电气设备有限公司 | Combination split type power supply apparatus for plasma cutter |
| CN1150075A (en) * | 1995-11-13 | 1997-05-21 | 天津大学 | Plasma cutting power supply |
| JP2008105043A (en) * | 2006-10-24 | 2008-05-08 | Komatsu Sanki Kk | Plasma cutting machine and plasma power source system |
| CN201685022U (en) * | 2009-12-11 | 2010-12-29 | 上海熔易焊接机制造有限公司 | Inverter multi-purpose arc welding machine plasma cutting insulating device |
| CN201848643U (en) * | 2010-11-12 | 2011-06-01 | 深圳市华意隆实业发展有限公司 | Plasma cutting machine with forced transfer function between guiding arc and cutting arc |
| 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 |
| CN103551716A (en) * | 2013-10-25 | 2014-02-05 | 华南理工大学 | Full-digital high-power plasma arc precise cutting system |
-
2014
- 2014-12-19 CN CN201410796978.3A patent/CN104439664B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112471A (en) * | 1994-05-27 | 1995-11-29 | 常州泛洋电气设备有限公司 | Combination split type power supply apparatus for plasma cutter |
| CN1150075A (en) * | 1995-11-13 | 1997-05-21 | 天津大学 | Plasma cutting power supply |
| JP2008105043A (en) * | 2006-10-24 | 2008-05-08 | Komatsu Sanki Kk | Plasma cutting machine and plasma power source system |
| CN201685022U (en) * | 2009-12-11 | 2010-12-29 | 上海熔易焊接机制造有限公司 | Inverter multi-purpose arc welding machine plasma cutting insulating device |
| CN201848643U (en) * | 2010-11-12 | 2011-06-01 | 深圳市华意隆实业发展有限公司 | Plasma cutting machine with forced transfer function between guiding arc and cutting arc |
| 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 |
| CN103551716A (en) * | 2013-10-25 | 2014-02-05 | 华南理工大学 | Full-digital high-power plasma arc precise cutting system |
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| CN104439664B (en) | 2016-08-24 |
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