CN1557597A - Multifunctional integrated welding and cutting equipment - Google Patents
Multifunctional integrated welding and cutting equipment Download PDFInfo
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- CN1557597A CN1557597A CNA2004100210627A CN200410021062A CN1557597A CN 1557597 A CN1557597 A CN 1557597A CN A2004100210627 A CNA2004100210627 A CN A2004100210627A CN 200410021062 A CN200410021062 A CN 200410021062A CN 1557597 A CN1557597 A CN 1557597A
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Abstract
The multifunctional integral welding and cutting power supply apparatus has structure comprising five parts of input rectifying and filtering circuit, welding and cutting inverter, HF transformer, output rectifying filter circuit and control circuit. The input rectifying and filtering circuit consists of one full bridge rectifier circuit and one filter circuit; the welding and cutting HF transformer consists of two converting switches and one transformer; and the output rectifying filter circuit and control circuit consists of full wave rectifying diodes, protecting RC elements, output inductor, output filtering capacitor and dead load; and the control circuit consists of PWM pulse generator, drive circuit, overcurrent and overheat protecting circuit and program control circuit. The present invention has the advantages of high efficiency, saving in power consumption, high performance, wide current regulating range, low cost, etc.
Description
Technical field
The present invention relates to a kind of welding and cutting power supply, belong to the power supply technical field.
Background technology
The novel welding inverter that grows up along with modern power electronics technology is owing to energy-efficient, the excellent tool electric arc processes of development prospect (welding, the cutting) equipment that becomes of control performance.
In the production and construction scene, in most cases need welding and cut two kinds of technologies to possess simultaneously, if an inverter can weld, can cut again, not only can convenient construction, and can save investment, the welding and the cutting double-purpose electric source key problem in technology be output voltage transfer problem (welding output voltage low, cutting output voltage height), welding cutting double-purpose electric source or employing separative element constitute welding and cutting device at present, perhaps adopt transformer tapping machinery control to constitute the integral type welding and cutting device, the former adds two equipment of needs in man-hour carrying out metal, causes equipment investment to waste, the latter adopts transformer tapping, the mode that former limit and secondary switch, this switching mode, transformer tapping many (4) causes the manufacturing process difficulty, control is complicated, in addition, how transformer tapping can bring than large space to high frequency inverter is unavoidably disturbed, and produces for normal work and makes troubles.
Summary of the invention
The objective of the invention is for solving the deficiency of above welding/cutting power supply structure, for welding and cutting provide a kind of multi-functional, volume is little, in light weight, simple in structure, control integral type welding and cutting device easily, to realize the variation of welding and cutting function, SMAW, dc argon arc welding, pulsed argon arc welding, four kinds of functions of plasma cutting are arranged with facility.
The present invention's structural design is achieved in that multifunctional integrated formula welding and cutting device is by input rectifying filter circuit, welding and cut inverter, high frequency transformer, output rectifier and filter and control circuit five parts and form.
As shown in Figure 1, the input rectifying filter circuit is made up of full bridge rectifier B1 and B2, filter capacitor C1, C2, C3, C4; Full bridge inverter is made up of controlled tr tube (MOSFET) VT1-VT4 and Resistor-Capacitor Unit; The welding and the cutting high frequency transformer by change-over switch J2 and J3, be with a tapped transformer to form; Output rectifier and filter is made up of full-wave rectification diode VD1 and VD2, resistance-capacitance protection element, outputting inductance L2, output filter capacitor C11, dead load R14; Control circuit is made up of pwm pulse generator TL494 (see figure 4), drive circuit (see figure 2), overcurrent and overheating protection circuit, sequence circuit (see figure 4).
Its connection is: mains supply is through switch S 1 and rectifier bridge B1; the B2 input connects; B1; the output of B2 is through input filter capacitor C1; C2; C3; C4; back and full-bridge inverter switching tube MOSFET (VT1; VT2; VT3; VT4;) connect, resistance-capacitance protection device R6C5 is housed on the switching tube; R10C7; R7C6; R11C8 output connects relay J 2; high frequency transformer TR1; transformer secondary output connects output commutation diode VD1; VD2; resistance-capacitance protection device R12C9; R13C10; rectification is after current divider FL; reactor L2; output filtering R15C11; load R14; high-frequency bypass capacitor C12; C13; C14; connect radio-frequency generator; radio-frequency generator is by the TR1 secondary coil; J3-1; J4-1; J5; R16; step-up transformer TR5; SD SP; R17; oscillating capacitance C15; high-frequency coupling coil TR6 forms.(as shown in Figure 1)
Detailed circuit is illustrated in conjunction with the accompanying drawings.
The course of work of main circuit is: to be through full-bridge inverting that the high-frequency alternating current of frequency 100kHz adds transformer TR1 elementary through becoming the smooth direct current electricity behind the rectifying and wave-filtering for civil power (220VAC50Hz), (transformer voltage ratio is 6: 1 during welding in step-down through TR1, be changed to 1.5: 1 during cutting, switch by relay J 2), behind the output rectifying and wave-filtering, output is fit to the direct current (floating voltage 53V during welding, floating voltage 210V during cutting) of welding and cutting.
Fig. 2 is No. 4 drive circuits, its input is connected to the output (9 pin of TL494,10 pin) of PWM integrated manipulator IC1 (TL494) through pulse transformer (TR3, TR4), triode (T4, T5), output is connected to grid and the source electrode of switching tube MOSFET respectively, and the function of this circuit is to realize the power amplification of pwm pulse signal.
Fig. 3 is pulse generating circuit and set-point circuit, pulse generating circuit is made up of IC 3 (TL494), Resistor-Capacitor Unit, triode (T1, T2), the set-point circuit is by relay J 6, electric current regulator potentiometer W3, maximum current limit potentiometer W1, pulse frequency potentiometer W7, dutycycle potentiometer W8, peak current pulse is closed potentiometer W6 and is formed, its function is when argon arc welding, realize the impulse welding connection function, when cutting and manual electric arc welding, close pulse function, and can be provided with or regulate welding or cutting current size.
Fig. 4 is by the PWM pulse-width modulation circuit, the voltage-stabilized power supply control circuit, and overheating protection circuit, current foldback circuit, feedback circuit, sequence circuit, the broken height frequency circuit is formed.
The voltage-stabilized power supply control circuit is by control transformer TR2, rectifier bridge B1 (KBP307G), three terminal regulator VLT1 (7812), VLT2 (7912) and filter circuit are formed, purpose be for other control circuit provide voltage-stabilized power supply (± 12V);
Overheating protection circuit is made up of thermistor RJ (being placed in the transformer coil), comparator IC1B (LM324), peripheral Resistor-Capacitor Unit, adjustment potentiometer W1.Purpose is when transformer is overheated, closes the output of PWM pulse-width modulation circuit.
Current foldback circuit is by current transformer L1, resistance R 3, IGCT SCR and peripheral circuit (among Fig. 4; R35, C18, D11, W2, C5, R12, inductance L 3), comparator IC1A (LM324) and peripheral circuit form; purpose is when overcurrent or current break (di/dt is excessive) appear in main circuit, closes PWM output.
Feedback circuit is made up of operational amplifier IC1D (LM324) and peripheral circuit, the feedback circuit input signal is taken from current divider FL two ends, output is connected to PWM pulse-width modulation circuit and broken height frequency circuit, the function of this circuit is that current feedback signal is carried out filtering and amplification, and current signal is provided for the broken height frequency circuit.
The PWM pulse-width modulation circuit is made up of IC1D (TL494), oscillation resistance R40, oscillating capacitance C27, Dead Time control element (C34, R150, R41), pi regulator (R42, C26, R43).The function of this circuit is the pwm pulse signal that produces two-way complementation (phase phasic difference 180 degree), and under the effect of given and feedback circuit signal, regulates or the stable pulse width.
The broken height frequency circuit by reference voltage VREF (+5V), comparator IC5A (LM339), triode T9, relay J 5 and peripheral Resistor-Capacitor Unit form, the input signal of circuit is the current feedback amplifying signal, the function of this circuit is when main circuit has electric current, cuts off the striking high frequency.
Sequence circuit is by arc welding gun switch GUN, electromagnetic gas valve DF, relay J 4, schmitt inverter IC4 (CD40106), optocoupler (PC1, PC2), triode (T3, T8) and peripheral Resistor-Capacitor Unit form, when the function shape pushes MMA (SMAW), 102 and 103 connections, the J4 adhesive, J4-1 and J4-2 are opened by normally closed often becoming, this moment is when carrying out SMAW (MMA): when functional switch pushes TIG (argon tungsten-arc welding), press arc welding gun switch GUN, can carry out the TIG welding, if increase peak point current/pulse and close potentiometer W6 this moment, can realize that also pulse TIG welding connects; When functional switch pushes CUT (air plasma cutting), 100 and 101 connections, J2 and J3 adhesive, circuit switches to cut state, and press cutting gun switch GUN this moment, can carry out the air plasma cutting.
Advantage of the present invention is:
Energy-efficient: this welding job efficient can reach more than 80%, the power factor height, and open circuit loss is minimum, is desirable energy-conserving product; Performance is good: this machine adopts advanced line principle design, and complete machine has good steady-state characteristic and dynamic characteristic, and constant current is stable, and reaction speed is fast, and the miniature electric arc initiation device is arranged, thereby striking is more prone to, arc stability, and it is little to splash, the electric arc good springiness; The electric current adjustable range is wide: output current is set arbitrarily in 10～160A scope and is regulated during welding, to satisfy the requirement of the different welding procedures of different user; Cost is low: adopt compressed air during cutting, greatly reduce cost than the gas medium that adopts other; Defencive function is complete: be provided with under-voltage protection, overtemperature protection, line fault in the machine by protection, will stop output automatically in case abnormal conditions occur, and the light emitting diode indication is arranged, treat to resume work automatically after abnormal conditions disappear; This welding machine can be used as conventional DC welding machine, argon arc welding machine and cutting machine and uses, and a tractor serves several purposes and volume are little, in light weight, easy to carry.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is a drive circuit schematic diagram of the present invention;
Fig. 3 is pulse generating circuit of the present invention and set-point circuit diagram;
Fig. 4 is a control circuit schematic diagram of the present invention;
Fig. 5 is a front and back panel structural representation of the present invention.
Among Fig. 5: 1; power switch; 2; the inspection air cock; 3; function switch; 4; improper indicator lamp is (under-voltage; overheated; fault); 5; power supply indicator; 6; ammeter, 7; pulse peak current is regulated turn-knob, 8; pulse duty factor is regulated turn-knob; 9; pulse frequency is regulated turn-knob; 10; argon gas delay protection time turn-knob, 11; current settings turn-knob (being that background current is set during pulsed argon arc welding), 12; air cleaner; 13; output cable "+" socket; 14; output cable "-" socket, 15; the bat-handle switch connector socket, 16; cooling fan; 17; the argon gas sebific duct connecting hole of giving vent to anger; 18; argon gas gas inlet rubber tube connecting hole, 19; AC220V imports cable, 20; the 8mm earth stud.
The specific embodiment
The course of work of the present invention is:
The welding job process: by civil power through rectification, filtering, be reverse into high frequency and obtain low-voltage and high-current through high-frequency rectification, filtering again, realize output constant current control with electronic impulse pulsewidth circuit PWM, obtain steep external characteristics simultaneously.
The cutting course of work: welding machine is placed cut state; after connecting air compressor; open the work of cutting machine power switch cooling fan; after the cutting torch switch is pressed; at first electromagnetic gas valve is connected; give and send compressed air with cooling electrode; after compression sprays from nozzle of cutting torch; alternating current becomes direct current through rectification circuit; producing the plasma arc bundle for cutting torch uses; radio-frequency generator and striking device work meanwhile; produce the high frequency voltage plasma arc that ignites, plasma arc is in the mechanical compress effect of nozzle; the comprehensive function of the thermal pinch of arc bundle and electromagnetism pinch effect forms strong beam-plasma flame stream down, with the local heat fused rapidly of workpiece; by high-voltage high-speed air stream the deposite metal cutting matrix that blows off is formed otch; finish cutting process, for guard electrode after cutting operation is finished, compressed air still continues to supply with; close after the time-delay several seconds, with cooling electrode.
Claims (8)
1, a kind of multi-functional soldering and cutting apparatus, it is characterized in that this equipment filters circuit, welding by input rectifying and cut inverter, high frequency transformer, output rectifier and filter, control circuit five parts and form, wherein the input rectifying filter circuit is made up of full bridge rectifier B1, filter capacitor C1 and C2; Full bridge inverter is made up of controlled tr tube (MOSFET) VT1-VT4 and Resistor-Capacitor Unit; Welding and cutting high frequency transformer are by change-over switch J2, J3, form with the transformer of a tap; Output rectifier and filter is made up of full-wave rectification diode VD1 and VD2, resistance-capacitance protection element, outputting inductance L2, output filter capacitor C11, dead load R14; Control circuit is by pwm pulse generator TL494; drive circuit; the overcurrent and overheating protection circuit; sequence circuit is formed; its connection is: mains supply is through switch and rectifier bridge B1; the B2 input connects; B1; the output of B2 is through input filter capacitor C1; C2; C3; C4; back and full-bridge inverter switching tube MOSFET (VT1; VT2; VT3; VT4;) connect; resistance-capacitance protection device R6C5 is housed on the switching tube; R10C7; R7C6; R11C8; output connects relay J 2; high frequency transformer TR1; transformer secondary output connects output commutation diode VD1; VD2; resistance-capacitance protection device R12C9; R13C10; rectification is after current divider FL; reactor L2; output filtering R15C11; load R14; high-frequency bypass capacitor C12; C13; C14; connect radio-frequency generator; radio-frequency generator is by the TR1 secondary coil; J3-1; J4-1; J5; R16, step-up transformer TR5; SD SP; R17; oscillating capacitance C15; high-frequency coupling coil TR6 forms.
2, by the described welding cutting equipment of claim 1; it is characterized in that control circuit by the PWM pulse-width modulation circuit, voltage-stabilized power supply control circuit, overheating protection circuit; current foldback circuit; feedback circuit, sequence circuit, the broken height frequency circuit is formed; wherein the voltage-stabilized power supply control circuit is by control transformer TR2; rectifier bridge B1 (KBP307G), three terminal regulator VLT1 (7812), VLT2 (7912) and filter circuit are formed, purpose be for other control circuit provide voltage-stabilized power supply (± 12V).
3,, it is characterized in that overheating protection circuit is made up of thermistor RJ (being placed in the transformer coil), comparator ICIB (LM324), peripheral Resistor-Capacitor Unit, adjustment potentiometer W1 by claim 1,2 described welding cutting equipments.Purpose is when transformer is overheated, closes the output of PWM pulse-width modulation circuit.
4, by claim 1,2 described welding cutting equipments; it is characterized in that current foldback circuit is made up of current transformer L1, resistance R 3, IGCT SCR and peripheral circuit R35, C18, D11, W2, C5, R12, inductance L 3, comparator IC1A (LM324) and peripheral circuit; purpose is when overcurrent or current break (di/dt is excessive) appear in main circuit, closes PWM output.
5,, it is characterized in that feedback circuit is made up of operational amplifier IC1D (LM324) and peripheral circuit by claim 1,2 described welding cutting equipments.The feedback circuit input signal is taken from current divider FL two ends, and output is connected to PWM pulse-width modulation circuit and broken height frequency circuit, and the function of this circuit is that current feedback signal is carried out filtering and amplification, and current signal is provided for the broken height frequency circuit.
6, by claim 1,2 described welding cutting equipments, it is characterized in that the PWM pulse-width modulation circuit is made up of IC1D (TL494), oscillation resistance R40, oscillating capacitance C27, Dead Time control element (C34, R150, R41), pi regulator (R42, C26, R43), the function of this circuit is the pwm pulse signal that produces two-way complementation (phase phasic difference 180 degree), and under the effect of given and feedback circuit signal, regulate or the stable pulse width.
7, by claim 1,2 described welding cutting equipments, it is characterized in that the broken height frequency circuit by reference voltage VREF (+5V), comparator IC5A (LM339), triode T9, relay J 5 and peripheral Resistor-Capacitor Unit form, the input signal of circuit is the current feedback amplifying signal, the function of this circuit is when main circuit has electric current, cuts off the striking high frequency.
8, by claim 1,2 described welding cutting equipments, it is characterized in that sequence circuit is made up of arc welding gun switch GUN, electromagnetic gas valve DF, relay J 4, schmitt inverter IC4, optocoupler (PC1, PC2), triode (T3, T8) and peripheral Resistor-Capacitor Unit, when functional switch pushes MMA (SMAW), 102 and 103 connections, the J4 adhesive, J4-1 and J4-2 are opened by normally closed often becoming, and carry out SMAW (MMA) this moment; When functional switch pushes TIG (argon tungsten-arc welding), press arc welding gun switch GUN, can carry out the TIG welding, close potentiometer W6 if increase peak point current/pulse this moment, can realize that also pulse TIG welding connects; When functional switch pushes CUT, 100 and 101 connections, J2 and J3 adhesive, circuit switches to cut state, and press cutting gun switch GUN this moment, can carry out the air plasma cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100210627A CN100343006C (en) | 2004-01-15 | 2004-01-15 | Multifunctional integrated welding and cutting equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100210627A CN100343006C (en) | 2004-01-15 | 2004-01-15 | Multifunctional integrated welding and cutting equipment |
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| CN1557597A true CN1557597A (en) | 2004-12-29 |
| CN100343006C CN100343006C (en) | 2007-10-17 |
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| CNB2004100210627A Expired - Fee Related CN100343006C (en) | 2004-01-15 | 2004-01-15 | Multifunctional integrated welding and cutting equipment |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101862894A (en) * | 2010-06-30 | 2010-10-20 | 无锡应达工业有限公司 | High-efficiency compact type solid state high-frequency induction welder |
| CN101966618A (en) * | 2010-11-12 | 2011-02-09 | 深圳市华意隆实业发展有限公司 | Reactor-free and shunt-free current type PWM inverter type welding cut power supply |
| CN102386800A (en) * | 2011-12-08 | 2012-03-21 | 崔建勋 | Low-voltage heavy-current high-power pulse power supply |
| CN102489910A (en) * | 2011-11-21 | 2012-06-13 | 江苏大德重工有限公司 | Numerical control flame cutting and shielded welding integrated machine |
| CN102794539A (en) * | 2012-08-31 | 2012-11-28 | 苏州市双马机电有限公司 | Limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder |
| 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 |
| CN103944429A (en) * | 2013-04-17 | 2014-07-23 | 济南田中工贸有限公司 | Dual-purpose machine for driving direct current arc welding machine and direct current motor |
| CN104393782A (en) * | 2014-11-05 | 2015-03-04 | 沈亚斌 | Single-phase inverter used for high-voltage DC and switching circuit |
| CN105364263A (en) * | 2015-08-27 | 2016-03-02 | 辽宁星云焊接设备制造有限公司 | Intelligent welding transverter |
| CN106374750A (en) * | 2016-09-19 | 2017-02-01 | 宁夏吴忠市好运电焊机有限公司 | Current-limiting pulse width double power supply inverter-type welding and cutting power supply circuit |
| CN106862737A (en) * | 2017-03-20 | 2017-06-20 | 华中科技大学 | Output overcurrent protection control circuit and the method for a kind of plasma cutting power supply |
| CN106862726A (en) * | 2017-03-17 | 2017-06-20 | 华中科技大学 | A kind of welding integrated power supply |
| CN106903447A (en) * | 2015-12-18 | 2017-06-30 | 贾奎中 | Charging portable plasma arc cuts bonding machine |
| CN108115250A (en) * | 2017-12-19 | 2018-06-05 | 浙江劳士顿焊接设备有限公司 | A kind of Multifunctional welding drive circuit |
| CN111438425A (en) * | 2020-04-13 | 2020-07-24 | 电王精密电器(北京)有限公司 | Multifunctional pulse arc welding power supply |
| CN112372129A (en) * | 2021-01-18 | 2021-02-19 | 烟台博迈精密机械制造有限公司 | High-frequency welding device is used in labeller production |
| CN115365625A (en) * | 2022-08-31 | 2022-11-22 | 深圳市佳士科技股份有限公司 | Circuit and equipment for cutting and welding |
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| JP2809683B2 (en) * | 1989-04-10 | 1998-10-15 | 松下電器産業株式会社 | Pulse arc welding machine |
| US5406051A (en) * | 1993-04-29 | 1995-04-11 | Electric Power Research Institute | Welding machine with a high frequency converter |
| CN2189999Y (en) * | 1994-05-19 | 1995-02-22 | 北京工业大学科技开发管理部 | Plasma-arc and argon arc welding controller with FET d.c.-a.c. converter |
| JPH10286669A (en) * | 1997-04-14 | 1998-10-27 | Daihen Corp | Combined arc welding machine for manual/tig welding |
| JP3981208B2 (en) * | 1998-06-19 | 2007-09-26 | 株式会社ダイヘン | Arc machining power supply |
| CN2360203Y (en) * | 1999-01-06 | 2000-01-26 | 时代集团公司 | Argon arc welding machine with high pressure pulse arc striking function |
| CN2510217Y (en) * | 2001-10-12 | 2002-09-11 | 邢宝祥 | High-efficient energy-saving portable welding-cutting machine |
| CN1303750C (en) * | 2003-03-17 | 2007-03-07 | 华南理工大学 | Soft-switch hidden-arc welding contrarariant power supply with double closed-loop control |
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| CN101862894B (en) * | 2010-06-30 | 2011-03-30 | 无锡应达工业有限公司 | Solid state high-frequency welder |
| CN101862894A (en) * | 2010-06-30 | 2010-10-20 | 无锡应达工业有限公司 | High-efficiency compact type solid state high-frequency induction welder |
| CN101966618A (en) * | 2010-11-12 | 2011-02-09 | 深圳市华意隆实业发展有限公司 | Reactor-free and shunt-free current type PWM inverter type welding cut power supply |
| CN102489910A (en) * | 2011-11-21 | 2012-06-13 | 江苏大德重工有限公司 | Numerical control flame cutting and shielded welding integrated machine |
| CN102386800A (en) * | 2011-12-08 | 2012-03-21 | 崔建勋 | Low-voltage heavy-current high-power pulse power supply |
| CN102386800B (en) * | 2011-12-08 | 2014-06-18 | 崔建勋 | Low-voltage heavy-current high-power pulse power supply |
| CN102794539A (en) * | 2012-08-31 | 2012-11-28 | 苏州市双马机电有限公司 | Limited delay phase-shift full-bridge soft-switch inverter manual electric arc welder |
| CN103944429A (en) * | 2013-04-17 | 2014-07-23 | 济南田中工贸有限公司 | Dual-purpose machine for driving direct current arc welding machine and direct current motor |
| CN103944429B (en) * | 2013-04-17 | 2016-08-17 | 济南田中工贸有限公司 | The dual-purpose machine of direct-current arc welding, DC motor Driver |
| 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 |
| CN103551716B (en) * | 2013-10-25 | 2016-06-22 | 华南理工大学 | Full-digital high-power plasma arc precise diced system |
| CN103551716A (en) * | 2013-10-25 | 2014-02-05 | 华南理工大学 | Full-digital high-power plasma arc precise cutting system |
| CN104393782A (en) * | 2014-11-05 | 2015-03-04 | 沈亚斌 | Single-phase inverter used for high-voltage DC and switching circuit |
| CN105364263A (en) * | 2015-08-27 | 2016-03-02 | 辽宁星云焊接设备制造有限公司 | Intelligent welding transverter |
| CN106903447A (en) * | 2015-12-18 | 2017-06-30 | 贾奎中 | Charging portable plasma arc cuts bonding machine |
| CN106374750A (en) * | 2016-09-19 | 2017-02-01 | 宁夏吴忠市好运电焊机有限公司 | Current-limiting pulse width double power supply inverter-type welding and cutting power supply circuit |
| CN106862726A (en) * | 2017-03-17 | 2017-06-20 | 华中科技大学 | A kind of welding integrated power supply |
| CN106862737A (en) * | 2017-03-20 | 2017-06-20 | 华中科技大学 | Output overcurrent protection control circuit and the method for a kind of plasma cutting power supply |
| CN108115250A (en) * | 2017-12-19 | 2018-06-05 | 浙江劳士顿焊接设备有限公司 | A kind of Multifunctional welding drive circuit |
| CN111438425A (en) * | 2020-04-13 | 2020-07-24 | 电王精密电器(北京)有限公司 | Multifunctional pulse arc welding power supply |
| CN112372129A (en) * | 2021-01-18 | 2021-02-19 | 烟台博迈精密机械制造有限公司 | High-frequency welding device is used in labeller production |
| CN115365625A (en) * | 2022-08-31 | 2022-11-22 | 深圳市佳士科技股份有限公司 | Circuit and equipment for cutting and welding |
| CN115365625B (en) * | 2022-08-31 | 2023-09-22 | 深圳市佳士科技股份有限公司 | Circuit and device for cutting and welding |
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Assignee: Guangzhou SUNCEN Welding Equipment Co., Ltd. Assignor: Shenyang University of Technology Contract fulfillment period: 2008.1.7 to 2013.1.6 contract change Contract record no.: 2009440000740 Denomination of invention: Multifunctional integrated welding and cutting equipment Granted publication date: 20071017 License type: Exclusive license Record date: 2009.7.23 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.1.7 TO 2013.1.6; CHANGE OF CONTRACT Name of requester: CHANGSHENG WELDING EQUIPMENT INDUSTRY CO., LTD., G Effective date: 20090723 |
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