CN103692072B - High-power class laser plasma arc diced system - Google Patents
High-power class laser plasma arc diced system Download PDFInfo
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- CN103692072B CN103692072B CN201310703568.5A CN201310703568A CN103692072B CN 103692072 B CN103692072 B CN 103692072B CN 201310703568 A CN201310703568 A CN 201310703568A CN 103692072 B CN103692072 B CN 103692072B
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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
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Abstract
The invention provides a kind of high-power class laser plasma arc diced system, its input connects three-phase alternating current input power; This system comprises Plasma Are Cutting Machine, magnetic control means and collaborative controller; One end of described magnetic control means is connected with three-phase alternating current input power, and the other end is connected with collaborative controller and Plasma Are Cutting Machine respectively; Described collaborative controller and Plasma Are Cutting Machine are interconnected.This invention high-power class laser plasma arc diced system adaptability is wide, expansion is convenient, the cutting accuracy of high powered plasma arc cutting machine and the cutting power to cut deal can not only be improved, scarfing allowance is little, stock utilization is high, and electrode erosion situation can be improved, increase the service life, reduce operating cost.
Description
Technical field
The present invention relates to Welding Technology and Equipment technology, more particularly, relate to a kind of high-power class laser plasma arc diced system.
Background technology
In recent years, in equipment manufactures such as ocean engineering, nuclear power, Aero-Space, automobile, wind-powered electricity generation, thermoelectricity, boats and ships, track traffic, petrochemical industries, its equipment maximizes increasingly, structure is day by day complicated and material is tending towards diversification, in the urgent need to a large amount of efficient, high-performance cutting processing technology and equipment.Wherein, gas cutting, plasma cut and laser cutting apply method for hot cutting more widely in industrial production.Laser cutting is mainly applicable to the cutting of thin plate, and it has the advantage that precision is high, scarfing is narrow and can save a large amount of cutting material, but adopt the equipment cost of laser cutting and production cost all higher.Compare traditional Methods of OFC-A, plasma arc cutting has the advantages that thermal deformation is little, cutting speed is faster, productivity ratio is high, the scope of application is wider and can cut nearly all material, when cutting the carbon steel of same thickness, its cutting speed is 5 ~ 7 times of O2-C2H2 cutting; And relative to laser cutting, plasma-arc cutting devices and job costs lower, and very high cut quality can be reached, especially in, in thick plates cutting, it has more the advantage of cost and efficiency.
But the scarfing of existing high powered plasma arc cutting is relatively wide, and cutting accuracy is high not enough, and cutting processing process also needs reserved larger allowance, and even reach the 1.5-2 of flame gas cutting doubly, stock utilization is not high, and loss is more.At present, the stock utilization of China's plasma arc cutting is about 68%, and external industrially developed country is more than 80%, according to China's 1 year cutting steel 7,000 ten thousand tons calculating, if stock utilization can be brought up to 80%, steel 8,400,000 tons can be saved every year, by the huge economic benefit of generation and social benefit.
At present, external just in Devoting Major Efforts To Developing fine plasma arc cutting method, the domestic R&D work that also to have had many producers to carry out relevant, the cutting accuracy of portioned product is close to the level of laser cutting, but cutting thickness or limited, and it is long to cut delay time, thus have impact on production efficiency.In addition, along with the increase of cutting thickness, cutting current and killer voltage must be improved; Meanwhile, in order to improve cutting accuracy, reducing scarfing allowance, needing again to compress plasma arc further, make thermal source more concentrated, make the energy density at arc spot place very high.Above-mentioned two factors can cause electrode to produce serious scaling loss, have influence on the life-span of cutting electrode, even affect production efficiency and cost.
Summary of the invention
The object of the invention is to overcome shortcoming of the prior art with not enough, provide that a kind of cutting accuracy is high, cutting power strong, the heat of electrode tip is distributed more even, to reduce electrode erosion and long service life high-power class laser plasma arc diced system; The cutting accuracy of this plasma arc diced system when cut deal cuts is close to laser cutting level, and stock utilization improves more than 5%, thus enhances productivity and production cost.
In order to achieve the above object, the present invention is achieved by following technical proposals: a kind of high-power class laser plasma arc diced system, is characterized in that: its input connects three-phase alternating current input power; Comprise Plasma Are Cutting Machine, magnetic control means and collaborative controller; One end of described magnetic control means is connected with three-phase alternating current input power, and the other end is connected with collaborative controller and Plasma Are Cutting Machine respectively; Described Plasma Are Cutting Machine one end is connected with three-phase alternating current input power, and the other end and collaborative controller are interconnected.
In such scheme, plasma arc cutting system of the present invention increases a high performance magnetic control means on Plasma Are Cutting Machine, by the Collaborative Control of collaborative controller, externally-applied magnetic field is utilized to improve the magnetostrictive effect of plasma arc jet, make electric arc more concentrated, reduce scarfing width, make the cutting accuracy of this plasma arc diced system when cut deal cuts close to laser cutting level, stock utilization improves more than 5%, thus enhances productivity and production cost.In addition, the present invention utilizes externally-applied magnetic field control electrode upper plasma arc spot to carry out homogeneity motion, the heat of electrode tip is distributed more even, reduces electrode erosion, thus extends the service life of electrode.
Described Plasma Are Cutting Machine comprises plasma arc cutting power supply, Ignitable gas devices, chilled water unit, plasma arc burning torch and executing agency; Described plasma arc burning torch is connected with plasma arc cutting power supply, Ignitable gas devices, chilled water unit and executing agency respectively; Described chilled water unit is connected with plasma arc cutting power supply; Described collaborative controller is interconnected with executing agency and plasma arc cutting power supply respectively; Described plasma arc cutting power supply is connected with three-phase alternating current input power.
More particularly, described Plasma Are Cutting Machine is analogue enlargement type Plasma Are Cutting Machine, or described Plasma Are Cutting Machine is the Plasma Are Cutting Machine of Digital Control.Plasma Are Cutting Machine of the present invention both can be traditional analogue enlargement type Plasma Are Cutting Machine, also can be the Plasma Are Cutting Machine of Digital Control.
Described collaborative controller comprises ARM micro control system, visual man-machine interface, relay module, signal detection module, communication interface modules and signal driver module; Described ARM micro control system is connected with visual man-machine interface, relay module, signal detection module, communication interface modules and signal driver module respectively;
Described collaborative controller is interconnected with executing agency and plasma arc cutting power supply respectively and refers to: the executing agency of described relay module and Plasma Are Cutting Machine is interconnected to control the motion of executing agency; Plasma arc cutting power supply and the executing agency of described signal detection module and Plasma Are Cutting Machine are connected; When described Plasma Are Cutting Machine is analogue enlargement type Plasma Are Cutting Machine, the signal driver module of collaborative controller is connected with the plasma arc cutting power supply of Plasma Are Cutting Machine, replaces the given of plasma arc cutting power supply with the drive singal realizing signal driver module; When described Plasma Are Cutting Machine is the Plasma Are Cutting Machine of Digital Control, the communication interface modules of collaborative controller is connected with the plasma arc cutting power supply of Plasma Are Cutting Machine, to realize information interaction and Collaborative Control.
Described magnetic control means comprise main circuit, with the interconnective controller of main circuit and the magnet exciting coil that is connected with main circuit; Described magnet exciting coil is connected with the plasma arc burning torch of Plasma Are Cutting Machine, and is arranged on plasma arc burning torch; Described controller is connected mutually with collaborative controller.
Described main circuit is connected to form successively by current rectifying and wave filtering circuit, prime constant-current source and rear class inverter bridge; Wherein, the input of current rectifying and wave filtering circuit is connected with three-phase alternating current input power, and the output of rear class inverter bridge is connected with magnet exciting coil; The mode of operation of described prime constant-current source is phase shifting full bridge soft switch pattern; The mode of operation of described rear class inverter bridge is low frequency full bridge hard switching modulating mode.
Described controller comprises ARM minimum system, failure protection module, high-frequency drive module, low frequency driving module, supply module, current feedback module and CAN interface circuit; Described ARM minimum system is connected with failure protection module, high-frequency drive module, low frequency driving module, supply module, current feedback module and CAN interface circuit respectively; One end of described failure protection module is all connected with three-phase alternating current input power with one end of supply module; Described high-frequency drive module and current feedback module are connected with the prime constant-current source of main circuit respectively; Described low frequency driving module is connected with the rear class inverter bridge of main circuit; The communication interface modules of described CAN interface circuit and collaborative controller is interconnected.
Described ARM minimum system by model be the ARM microprocessor one of LM4F232H5QC, jtag interface circuit one, crystal oscillating circuit one and reset circuit one connected to form by peripheral circuit; Described crystal oscillating circuit one is connected to form by peripheral circuit by crystal oscillator Y1, electric capacity C125 and electric capacity C126; Described reset circuit one is connected to form by peripheral circuit by switch S 1, resistance R106, resistance R107 and electric capacity C127; Described jtag interface circuit one is connected to form by jtag interface chip and resistance R100, R101, R102 and R103.
The ARM micro control system of described collaborative controller by model be the ARM microprocessor two of LM4F232H5QC, crystal oscillating circuit two, jtag interface circuit two and reset circuit two connected to form by peripheral circuit.
The visual man-machine interface of described collaborative controller is connected to form by peripheral circuit by the liquid crystal display that model is the lcd drive chip of RA8875, model is the power supply boost adjuster of TPS61040, CAT4139LED backlight drive circuit and model are AT070TN92, to realize the human-computer interaction function of the setting of parameter, state display and fault diagnosis; Described visual man-machine interface is connected with ARM micro control system by GPIO mouth able to programme;
The signal detection module of described collaborative controller is connected to form by peripheral circuit by current sensor, voltage sensor, temperature sensor, flow sensor and corresponding signal conditioning circuit; Described signal detection module is connected with ARM micro control system by a/d converter port, realizes analog-to-digital conversion;
The RS-232 telecommunication circuit that the communication interface modules of described collaborative controller is made up of for main the chip taking model as SP3232E, take model as the RS-485 telecommunication circuit that forms of the chip of SP3485 and take model as CTM8251T chip for the main CAN communication circuit formed is connected to form by peripheral circuit; Described RS-232 telecommunication circuit is connected with ARM micro control system by UART port with RS-485 telecommunication circuit; Described CAN communication circuit is connected with ARM micro control system by CAN port;
The signal driver module of described collaborative controller is that the digital to analog converter chip of TLC5615 and photoelectric coupled circuit are connected to form by peripheral circuit by model, and the digital-to-analogue conversion and the isolation that realize signal are amplified; Described signal driver module is connected with ARM micro control system by GPIO port.
Principle of the present invention is such: electric arc produces contraction under the effect of mechanical compress effect, thermal pinch and magnetostrictive effect, form compression plasma arc, plasma arc cutting is exactly utilize the plasma arc of this high-energy-density to melt cut workpiece, and by Compressed Gas at a high speed, deposite metal blown open and form cutting scarfing, the general principle of plasma arc cutting that Here it is.The present invention is high-power class laser plasma arc diced system, and the cutting gun of general Plasma Are Cutting Machine is installed a set of high performance magnetic control means; When plasma arc cutting, magnetic control means is utilized to produce high-intensity magnetic field, by the Collaborative Control of collaborative controller, this magnetic field is utilized to strengthen the magnetostrictive effect of plasma arc, plasma arc is compressed further, reduces arc column sectional area, deflection and the energy density of electric arc are improved, thus reduce scarfing width, improve plasma arc cutting system to the cutting accuracy of cut deal and cutting power.In addition, due to the effect of strong external magnetic field, cause the arc spot on electrode to carry out the motion of homogeneity at electrode end surface, the heat of electrode surface is distributed and is tending towards even, reduce electrode erosion, thus improve electrode life.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, high-power class laser plasma arc diced system adaptability of the present invention is wide, not only go for digitlization Plasma Are Cutting Machine, also the transformation of traditional analog type Plasma Are Cutting Machine can be used for, only on the burning torch of existing Plasma Are Cutting Machine, magnetic control means need be installed, just expected effect can be realized by the Collaborative Control of collaborative controller, it reequips facility, and structure is simple.
2, high-power class laser plasma arc diced system of the present invention can improve cutting accuracy and the cutting power of plasma arc cutting technique further, reduce scarfing width, improve stock utilization and electrode life, thus reduce the longtime running cost of high powered plasma arc diced system.
3, the magnetic control means of the present invention's high-power class laser plasma arc diced system have employed advanced high-frequency inversion technology and the all-digitized demodulator technology based on ARM, and efficiency is high, and dynamic property is good, high to the control accuracy of magnetic field intensity and distribution character.
4, the collaborative controller of the present invention's high-power class laser plasma arc diced system have employed digitized interactive mode, achieve the visualized management of man-machine interaction, make the operability of whole high-power class laser plasma arc diced system good, expansion and transplant more convenient.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention's high-power class laser plasma arc diced system;
Fig. 2 is the magnetic control means structured flowchart of the present invention's high-power class laser plasma arc diced system;
Fig. 3 is the collaborative controller structured flowchart of the present invention's high-power class laser plasma arc diced system;
Fig. 4 is the magnetic control means main circuit schematic diagram of the present invention's high-power class laser plasma arc diced system;
Fig. 5 is the magnetic control means controller architecture block diagram of the present invention's high-power class laser plasma arc diced system;
Fig. 6 is the ARM minimum system schematic diagram of the magnetic control means of the present invention's high-power class laser plasma arc diced system;
Fig. 7 is the collaborative controller functional interface schematic diagram of the present invention's high-power class laser plasma arc diced system.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
Embodiment
As shown in Figure 1, the input of the present invention's high-power class laser plasma arc diced system connects three-phase alternating current input power; This plasma arc diced system comprises Plasma Are Cutting Machine 100, magnetic control means 200 and collaborative controller 300; One end of magnetic control means 200 is connected with three-phase alternating current input power, and the other end is connected with collaborative controller 300 and Plasma Are Cutting Machine 100 respectively; Plasma Are Cutting Machine 100 one end is connected with three-phase alternating current input power, and the other end and collaborative controller 300 are interconnected.
Wherein, Plasma Are Cutting Machine 100 both can be traditional analogue enlargement type Plasma Are Cutting Machine, also can be the Plasma Are Cutting Machine of Digital Control, it comprises plasma arc cutting power supply 1001, Ignitable gas devices 1002, chilled water unit 1003, plasma arc burning torch 1004 and executing agency 1005; Plasma arc burning torch 1004 is connected with plasma arc cutting power supply 1001, Ignitable gas devices 1002, chilled water unit 1003 and executing agency 1005 respectively; Chilled water unit 1003 is connected with plasma arc cutting power supply 1001; Plasma arc cutting power supply 1001 is connected with three-phase alternating current input power.Collaborative controller 300 is connected with plasma arc cutting power supply 1001 mutually with executing agency 1005 respectively.Magnetic control means 200 comprise main circuit 201, with the interconnective controller 210 of main circuit 201 and the magnet exciting coil 220 that is connected with main circuit 201; Magnet exciting coil 220 is connected with the plasma arc burning torch 1004 of Plasma Are Cutting Machine 100, and is arranged on plasma arc burning torch 1004; Controller 210 is connected mutually with collaborative controller 300.
As shown in Figure 3, the collaborative controller 300 of the present invention's high-power class laser plasma arc diced system comprises ARM micro control system 3001, visual man-machine interface 3002, relay module 3004, signal detection module 3003, communication interface modules 3006 and signal driver module 3005; ARM micro control system 3001 is connected with visual man-machine interface 3002, relay module 3004, signal detection module 3003, communication interface modules 3006 and signal driver module 3005 respectively.Wherein, collaborative controller 300 is interconnected with executing agency 1005 and plasma arc cutting power supply 1001 respectively and refers to: relay module 3004 is interconnected to control the motion of executing agency 1005 with the executing agency 1005 of Plasma Are Cutting Machine 100; Plasma arc cutting power supply 1001 and the executing agency 1005 of signal detection module 3003 and Plasma Are Cutting Machine 100 are connected.When Plasma Are Cutting Machine 100 is analogue enlargement type Plasma Are Cutting Machine, the signal driver module 3005 of collaborative controller 300 is connected with the plasma arc cutting power supply 1001 of Plasma Are Cutting Machine 100, replaces the given of plasma arc cutting power supply 1001 with the drive singal realizing signal driver module 3005; When Plasma Are Cutting Machine 100 is the Plasma Are Cutting Machine of Digital Control, the communication interface modules 3006 of collaborative controller 300 is connected with the plasma arc cutting power supply 1001 of Plasma Are Cutting Machine 100, to realize information interaction and Collaborative Control.
As shown in Figure 2, the main circuit 201 of the magnetic control means of the present invention's high-power class laser plasma arc diced system is connected to form successively by current rectifying and wave filtering circuit 2011, prime constant-current source 2012 and rear class inverter bridge 2013; Wherein, the input of current rectifying and wave filtering circuit 2011 is connected with three-phase alternating current input power, and the output of rear class inverter bridge 2013 is connected with magnet exciting coil 220; The mode of operation of prime constant-current source 2011 is phase shifting full bridge soft switch pattern; The mode of operation of rear class inverter bridge 2013 is low frequency full bridge hard switching modulating mode.Controller 210 comprises ARM minimum system 2107, failure protection module 2101, high-frequency drive module 2102, low frequency driving module 2105, supply module 2102, current feedback module 2104 and CAN interface circuit 2106; ARM minimum system 2107 is connected with failure protection module 2101, high-frequency drive module 2102, low frequency driving module 2105, supply module 2102, current feedback module 2104 and CAN interface circuit 2106 respectively.Wherein, one end of failure protection module 2101 is all connected with three-phase alternating current input power with one end of supply module 2102; high-frequency drive module 2103 and current feedback module 2104 are connected with the prime constant-current source 2012 of main circuit 201 respectively; low frequency driving module 2105 is connected with the rear class inverter bridge 2013 of main circuit 201, and CAN interface circuit 2106 is interconnected with the communication interface modules 3006 of collaborative controller 300.
The externally-applied magnetic field of the present invention's high-power class laser plasma arc diced system can adopt transverse magnetic field, longitudinal magnetic field, double sharp magnetic field and rotating excitation field etc., and the present invention is that embodiment is described with alternating magnetic field.As shown in Figure 4, the main circuit 201 of magnetic control means 200 is interconnected by current rectifying and wave filtering circuit 2011, prime constant-current source 2012 and rear class inverter bridge 2013 and forms.Wherein, current rectifying and wave filtering circuit 2011 is connected and composed by three-phase commutation bridge D1-D6, electric capacity C1; Prime constant-current source 2012 is connected and composed by peripheral circuit by power switch pipe V1-V4, anti-paralleled diode D7-D10, resonant capacitance C1-C4, resonant inductance Lr, intermediate-frequency transformer T, output rectifier bridge D11-D14 and filter reactance L1; Rear class inverter bridge 2013 is connected and composed by peripheral circuit by power switch pipe V5-V8, anti-paralleled diode D15-D18 and electric capacity C5-C8.Three phase mains becomes more level and smooth direct current after current rectifying and wave filtering circuit 2011, then the Closed-loop control through being made up of power switch pipe V1-V4, by the high frequency stacked switch of power switch pipe V1-V4, convert high voltagehigh frequency square wave to, then low-voltage high-frequency square wave is converted to through intermediate-frequency transformer T, again through the fast recovery rectifier of output rectifier bridge D11-D14 and the smothing filtering of filter reactance L1, become direct current.Wherein, power switch pipe V1-V4 works in phase-shift soft switch commutating mode; The current signal of the current feedback module 2104 sampling filter reactance L1 output of controller 210, ARM minimum system 2107 is inputed to after conditioning, compare and digital operation with Setting signal in ARM microprocessor, then digital PWM signal is exported, the switching sequence and the dutycycle that control power switch pipe V1-V4 is gone after high-frequency drive module 2103 is isolated and amplified, realize the closed-loop control of electric current, form prime constant-current source.The direct current of this constant-current source output constant current characteristic enters into rear class inverter bridge, and rear class inverter bridge is a full-bridge topologies, wherein power switch pipe V5/V8 synchro switch, power switch pipe V6/V7 synchro switch; When power switch pipe V5/V8 opens, power switch pipe V6/V7 turns off; When power switch pipe V5/V8 turns off, power switch pipe V6/V7 switch; So just can output duty cycle and all changeable AC square wave current of frequency, if the output valve of constant-current source does synchronous change, then the AC square wave current size exported also can flexible modulation.This AC square wave current is input to magnet exciting coil 220, the excitation field required for generation.
As shown in Figure 5, the ARM minimum system 2107 of the magnetic control means controller of the present invention's high-power class laser plasma arc diced system is core primarily of the LM4F232H5QC chip based on M4 kernel, is aided with crystal oscillating circuit and reset circuit formation.Supply module 2102 provides the electric energy of power demand and magnitude of voltage for whole controller 210; Failure protection module 2101 can realize the detection of overvoltage, the fault such as under-voltage and overheated, and change the fault-signal of correspondence into on-off model, directly access the GPIO mouth able to programme of ARM minimum system 2107, LM4F232H5QC judges the fault type occurred according to the on-off model situation of change of corresponding GPIO mouth, and dispose according to the handling process preset, and information is sent to collaborative controller 300 and carries out malfunction display and warning; The output of current feedback circuit 2104 is directly linked into the ADC module of ARM minimum system 2107, carries out analog-to-digital conversion to current feedback signal; CAN interface circuit 2106 one end is directly connected with the CAN interface module of ARM minimum system 2107, and one end is connected with collaborative controller 300, realizes data communication and information interaction; Pwm signal needed for prime constant-current source controls directly is produced by the PWM port of ARM minimum system 2107, and is input to high-frequency drive module 2103 and carries out electrical isolation and power amplification; Two-way push-pull type low frequency digital pwm signal needed for rear class inverter bridge is then produced by the TIMER port of ARM minimum system 2107, is then input to low frequency driving module 2105 and carries out electrical isolation and power amplification.
As shown in Figure 6, the magnetic control means of the present invention's high-power class laser plasma arc diced system ARM minimum system primarily of model be the ARM microprocessor one of LM4F232H5QC, jtag interface circuit one, crystal oscillating circuit one and reset circuit one connected to form by peripheral circuit.Wherein, the magnetic control software based on FreeRTOS kernel is solidified with in described LM4F232H5QCARM microprocessor one; Crystal oscillating circuit one is connected to form by peripheral circuit by crystal oscillator Y1, electric capacity C125 and electric capacity C126; Reset circuit one is connected to form by peripheral circuit by switch S 1, resistance R106, resistance R107 and electric capacity C127; Jtag interface circuit one is connected to form by jtag interface chip and resistance R100, R101, R102 and R103.
Fig. 7 is the collaborative controller functional interface schematic diagram of the present invention's high-power class laser plasma arc diced system.ARM micro control system 3001 is connected and composed by peripheral circuit by the ARM microprocessor two taking model as LM4F232H5QC, crystal oscillating circuit two, jtag interface circuit two and reset circuit two.Visual man-machine interface 3002 is directly connected with the GPIO mouth able to programme of ARM micro control system 3001, create 7 cun of liquid crystal display AT070TN92 primarily of special liquid crystal driving chip RA8875, power supply TPS61040boost adjuster, CAT4139LED backlight drive circuit and group to be formed by peripheral circuit, realize the human-computer interaction functions such as the setting of parameter, state display, fault diagnosis.Relay module 3004 directly and the GPIO port able to programme of ARM micro control system 3001.Signal detection module 3003 is connected and composed by peripheral circuit primarily of current sensor, voltage sensor, temperature sensor, flow sensor and corresponding signal conditioning circuit, it is directly connected to the a/d converter port of ARM micro control system 3001, realizes analog-to-digital conversion.It is the main RS-232 telecommunication circuit formed that communication interface modules 3006 includes by SP3232E chip, be the main RS-485 telecommunication circuit that forms by SP3485 chip and be the main CAN communication circuit formed by CTM8251T chip, RS232 with the RS485 circuit of communication interface modules is directly connected with the UART port of ARM micro control system 3001, and CAN communication circuit is directly connected with the CAN port of ARM micro control system 3001.Signal driver module 3005 is directly connected with the GPIO port of ARM micro control system 3001, connected and composed by peripheral circuit primarily of the 10 figure place weighted-voltage D/A converter chip TLC5615 and photoelectric coupled circuit with serial line interface, the digital-to-analogue conversion and the isolation that realize signal are amplified.
The present invention's high-power class laser plasma arc diced system is work like this:
As shown in Figure 1, Figure 2 and Figure 3, three phase mains is powered to Plasma Are Cutting Machine 100, magnetic control means 200 and collaborative controller 300, plasma arc cutting power supply 1001 refrigeration radiating can be thought in chilled water unit 1,003 one aspect, dispel the heat for plasma arc burning torch 1004 on the one hand, for Ignitable gas devices 1002 and plasma arc burning torch 1004 provide Compressed Gas, blow molten metal open formation scarfing when cutting.Three phase mains input current is through current rectifying and wave filtering circuit 2011, prime constant-current source 2012, the rear class inverter bridge 2013 of excitation unit 200 main circuit 201, through the alternating current that digital low frequency modulations becomes dutycycle, frequency and size all adjustable, access magnet exciting coil 220 produces additional strong external magnetic field, and magnet exciting coil 220 is directly installed on plasma arc burning torch 1004; The collaborative work of collaborative controller 300 Collaborative Control Plasma Are Cutting Machine 100 and magnetic control means 200.When Plasma Are Cutting Machine 100 is traditional analogue type Plasma Are Cutting Machines, the signal driver module 3005 of collaborative controller 300 is directly connected with plasma arc cutting power supply 1001, replaces the given of plasma arc cutting power supply 1001 with this drive singal; If Plasma Are Cutting Machine 100 is numeric types, then the communication interface modules 3006 of collaborative controller 300 directly and Plasma Are Cutting Machine 100 carry out digital communication, realize information interaction and Collaborative Control.When cutting, collaborative controller 300 can also control the motion of executing agency 1005 by relay module 3004, also detect the status information such as actual output current waveform, voltage waveform, gas flow, executing agency's movement velocity, temperature of magnetic control means 200, Plasma Are Cutting Machine 100 simultaneously by signal detection module 3003, the match condition of excitation parameter with cutting work technological parameter is observed and passed judgment on.During cutting, system components is powered, system initializes, by collaborative controller 300, self-inspection is carried out to whole plasma arc system, then on visible human machine interactive interface, set corresponding excitation parameter and cutting technique parameter, enter cutting flow process afterwards, Plasma Are Cutting Machine 100 produces plasma arc, fusing workpiece, and molten material is blown open formation scarfing under compressed-air actuated effect; Now magnetic control means 200 is energized to magnet exciting coil 220, and produce strong external magnetic field, article on plasma arc compresses, and the deflection of plasma arc and energy density is improved, reduces the width of scarfing, improve cutting accuracy.Strong external magnetic field also makes the arc spot on electrode produce motion simultaneously, guarantees that the thermo parameters method on electrode is more even, reduces electrode erosion.
The above embodiment of the present invention has following characteristics:
1, wide apaptability: magnetic control means and the collaborative controller of the present embodiment are modular organization, as long as install magnetic control means on the burning torch of general Plasma Are Cutting Machine, just can realize the cutting that becomes more meticulous, almost can be applied to all general Plasma Are Cutting Machines; Magnetic control means have employed high-frequency inversion technology, and the time constant of major loop is little, and dynamic response is fast, and externally-applied magnetic field article on plasma arc Energy distribution is system without deaerator simultaneously, makes Magnetic control cutting process very sensitive; These all improve the Technological adaptability of the present embodiment.
2, cut quality is good: the present embodiment is according to the basic principle of plasma arc cutting, the magnetostrictive effect of plasma arc is strengthened by additional high-intensity magnetic field, the plasma arc that arc column sectional area is less, energy density is higher can be produced, thus decrease cutting scarfing width, improve cut quality, add raw-material utilization ratio, the cutting power of plasma arc to cut deal have also been obtained raising simultaneously.
3, operating cost is low: the cutting effect being realized class laser by magnetic control compress mode, not only saves raw material, also saves the cost of following process, but also can improve electrode life, is also conducive to enterprise and makes full use of existing manufacturing process.
4, good operability: the present embodiment has digitlization, visual human-computer interaction interface, optimum configurations and state show all very directly perceived; Both had digital communication interface simultaneously, and also had traditional analog interface circuit, also very convenient with the connection of Plasma Are Cutting Machine, expansion easily.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. a high-power class laser plasma arc diced system, is characterized in that: its input connects three-phase alternating current input power; Comprise Plasma Are Cutting Machine, magnetic control means and collaborative controller; One end of described magnetic control means is connected with three-phase alternating current input power, and the other end is connected with collaborative controller and Plasma Are Cutting Machine respectively; Described Plasma Are Cutting Machine one end is connected with three-phase alternating current input power, and the other end and collaborative controller are interconnected;
Described Plasma Are Cutting Machine comprises plasma arc cutting power supply, Ignitable gas devices, chilled water unit, plasma arc burning torch and executing agency; Described plasma arc burning torch is connected with plasma arc cutting power supply, Ignitable gas devices, chilled water unit and executing agency respectively; Described chilled water unit is connected with plasma arc cutting power supply; Described collaborative controller is interconnected with executing agency and plasma arc cutting power supply respectively; Described plasma arc cutting power supply is connected with three-phase alternating current input power;
Described Plasma Are Cutting Machine is analogue enlargement type Plasma Are Cutting Machine, or described Plasma Are Cutting Machine is the Plasma Are Cutting Machine of Digital Control;
Described collaborative controller comprises ARM micro control system, visual man-machine interface, relay module, signal detection module, communication interface modules and signal driver module; Described ARM micro control system is connected with visual man-machine interface, relay module, signal detection module, communication interface modules and signal driver module respectively;
Described collaborative controller is interconnected with executing agency and plasma arc cutting power supply respectively and refers to: the executing agency of described relay module and Plasma Are Cutting Machine is interconnected to control the motion of executing agency; Plasma arc cutting power supply and the executing agency of described signal detection module and Plasma Are Cutting Machine are connected; When described Plasma Are Cutting Machine is analogue enlargement type Plasma Are Cutting Machine, the signal driver module of collaborative controller is connected with the plasma arc cutting power supply of Plasma Are Cutting Machine, replaces the given of plasma arc cutting power supply with the drive singal realizing signal driver module; When described Plasma Are Cutting Machine is the Plasma Are Cutting Machine of Digital Control, the communication interface modules of collaborative controller is connected with the plasma arc cutting power supply of Plasma Are Cutting Machine, to realize information interaction and Collaborative Control.
2. high-power class laser plasma arc diced system according to claim 1, is characterized in that: described magnetic control means comprise main circuit, with the interconnective controller of main circuit and the magnet exciting coil that is connected with main circuit; Described magnet exciting coil is connected with the plasma arc burning torch of Plasma Are Cutting Machine, and is arranged on plasma arc burning torch; Described controller is connected mutually with collaborative controller.
3. high-power class laser plasma arc diced system according to claim 2, is characterized in that: described main circuit is connected to form successively by current rectifying and wave filtering circuit, prime constant-current source and rear class inverter bridge; Wherein, the input of current rectifying and wave filtering circuit is connected with three-phase alternating current input power, and the output of rear class inverter bridge is connected with magnet exciting coil; The mode of operation of described prime constant-current source is phase shifting full bridge soft switch pattern; The mode of operation of described rear class inverter bridge is low frequency full bridge hard switching modulating mode.
4. high-power class laser plasma arc diced system according to claim 3, is characterized in that: described controller comprises ARM minimum system, failure protection module, high-frequency drive module, low frequency driving module, supply module, current feedback module and CAN interface circuit; Described ARM minimum system is connected with failure protection module, high-frequency drive module, low frequency driving module, supply module, current feedback module and CAN interface circuit respectively; One end of described failure protection module is all connected with three-phase alternating current input power with one end of supply module; Described high-frequency drive module and current feedback module are connected with the prime constant-current source of main circuit respectively; Described low frequency driving module is connected with the rear class inverter bridge of main circuit; The communication interface modules of described CAN interface circuit and collaborative controller is interconnected.
5. high-power class laser plasma arc diced system according to claim 4, is characterized in that: described ARM minimum system by model be the ARM microprocessor one of LM4F232H5QC, jtag interface circuit one, crystal oscillating circuit one and reset circuit one connected to form by peripheral circuit; Described crystal oscillating circuit one is connected to form by peripheral circuit by crystal oscillator Y1, electric capacity C125 and electric capacity C126; Described reset circuit one is connected to form by peripheral circuit by switch S 1, resistance R106, resistance R107 and electric capacity C127; Described jtag interface circuit one is connected to form by jtag interface chip and resistance R100, R101, R102 and R103.
6. high-power class laser plasma arc diced system according to claim 1, is characterized in that: the ARM micro control system of described collaborative controller by model be the ARM microprocessor two of LM4F232H5QC, crystal oscillating circuit two, jtag interface circuit two and reset circuit two connected to form by peripheral circuit.
7. high-power class laser plasma arc diced system according to claim 6, it is characterized in that: the visual man-machine interface of described collaborative controller is connected to form by peripheral circuit by the liquid crystal display that model is the lcd drive chip of RA8875, model is the power supply boost adjuster of TPS61040, CAT4139LED backlight drive circuit and model are AT070TN92, to realize the human-computer interaction function of the setting of parameter, state display and fault diagnosis; Described visual man-machine interface is connected with ARM micro control system by GPIO mouth able to programme;
The signal detection module of described collaborative controller is connected to form by peripheral circuit by current sensor, voltage sensor, temperature sensor, flow sensor and corresponding signal conditioning circuit; Described signal detection module is connected with ARM micro control system by a/d converter port, realizes analog-to-digital conversion;
The RS-232 telecommunication circuit that the communication interface modules of described collaborative controller is made up of for main the chip taking model as SP3232E, take model as the RS-485 telecommunication circuit that forms of the chip of SP3485 and take model as CTM8251T chip for the main CAN communication circuit formed is connected to form by peripheral circuit; Described RS-232 telecommunication circuit is connected with ARM micro control system by UART port with RS-485 telecommunication circuit; Described CAN communication circuit is connected with ARM micro control system by CAN port;
The signal driver module of described collaborative controller is that the digital to analog converter chip of TLC5615 and photoelectric coupled circuit are connected to form by peripheral circuit by model, and the digital-to-analogue conversion and the isolation that realize signal are amplified; Described signal driver module is connected with ARM micro control system by GPIO port.
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| CN104785922B (en) * | 2015-03-27 | 2017-05-31 | 大族激光科技产业集团股份有限公司 | Realize the laser cutting machine system and method for double-type control |
| CN105414728B (en) * | 2015-12-25 | 2017-09-15 | 华中科技大学 | A kind of air plasma cutter single-sensor arc ignition circuit and its control method |
| CN110125558B (en) * | 2019-05-22 | 2024-01-30 | 东莞市雷宇激光设备有限公司 | Laser cutting engraver control system |
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