CN1173793C - Digital signal control system for microbeam plasma welding machine - Google Patents
Digital signal control system for microbeam plasma welding machine Download PDFInfo
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- CN1173793C CN1173793C CNB021112568A CN02111256A CN1173793C CN 1173793 C CN1173793 C CN 1173793C CN B021112568 A CNB021112568 A CN B021112568A CN 02111256 A CN02111256 A CN 02111256A CN 1173793 C CN1173793 C CN 1173793C
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Abstract
The present invention relates to a digital signal control system for a micro-beam plasma welding machine. The present invention is characterized in that the present invention adopts a digital signal processor (DSP) as a central processor unit; a sequential control interface is arranged between a gas valve control relay, a small arc power supply start-stop control relay, a main arc power supply control relay and an arc starting start-stop control relay, and the DSP processor; a man-machine conversation interface is arranged between a keyboard, a liquid crystal digital display, a process switch and a welding gun switch, and the DSP processor; a detector of a water switch and an interface are arranged between the water switch and the DSP processor; a fault interface circuit is arranged between a fault detection circuit for water, electricity and gas and a fault alarm indicator lamp, and the DSP processor; a main arc power supply interface circuit which detects and controls the work of a main arc power supply is arranged between the main arc power supply and the DSP processor; therefore, the reliable operation of a micro-beam plasma welding machine is ensured.
Description
Technical field:
The present invention relates to microbeam plasma welding machine, particularly a kind of digital signal control system of microbeam plasma welding machine.
Background technology:
Micro beam plasma welding is the comparatively complicated a kind of welding technique of process in the welding equipment, the microbeam plasma welding machine of realizing this method welding process includes the water route, protection gas, ion gas, little arc power, main arc power source, hardware devices such as arc initiation device, the work of all these hardware devices all is to carry out under the driving of electricity and control, this kind equipment was many in the past finishes with electric wiring, hardware system is quite complicated, volume is big, the equipment heaviness, electromagnetic interference is serious, the performance and the reliability of operation of equipment are reduced greatly, also useful chip microcontroller is to the control of these hardware devices, as " microbunch plasma arc special welding machine " (number of patent application: 89106259.9), " constant power microbeam plasma arc welder " (number of patent application: 86101100), but since single-chip microcomputer only be suitable for controlling and simple with, or, NOT logic computing and adding, subtract arithmetical operation, be difficult to carry out comparatively complicated formula, logical operation is to carrying out a large amount of information processings, control law that image is handled and realized optimizing and complicated control system are then powerless; Simultaneously, also difficulty realizes the good man-machine interaction system and finishes self adaptation, self study process, differs greatly from intelligentized welding equipment.
Summary of the invention:
The technical problem to be solved in the present invention just is to overcome the deficiency of above-mentioned prior art microbeam plasma welding machine control system, optimize the control of MICROBEAM PLASMA WELDING process on the one hand, make it to have the intelligent performance of auto-adaptive controling ability and self study process, make machine user oriented more on the other hand, the microbeam plasma welding machine miniaturization that more becomes, and a kind of digital signal control system of microbeam plasma welding machine is provided.
Technical solution of the present invention is as follows:
A kind of digital signal control system of microbeam plasma welding machine, comprise main arc power source and main arc power source start and stop control relay, little arc power and start and stop control relay thereof, arc initiation device and start and stop control relay thereof, gas circuit and Air Valve Control relay thereof, water route and hydraulic pressure switch thereof, keyboard, liquid crystal digital shows, the process switch, arc welding gun switch, water, electricity and gas failure detector circuit and fault alarm indicator lamp is characterized in that:
1. adopt data signal (data signal) processor to make central processing unit;
2. between Air Valve Control relay, little arc power start and stop control relay, main arc power source control relay, striking start and stop control relay and digital signal processor, be provided with the SECO interface;
3. between keyboard, liquid crystal digital demonstration, process switch and arc welding gun switch and digital signal processor, be provided with man-machine dialogue interface;
4. being provided with hydraulic pressure switch between hydraulic pressure switch and digital signal processor detects and interface;
5. between water, electricity and gas failure detector circuit and fault alarm indicator lamp and digital signal processor, be provided with the fault interface circuit;
6. between main arc power source and digital signal processor, also be provided with the main arc power source interface circuit that detects and control main arc power source work.
Said digital signal processor is TMS320F240.
The control procedure of the digital signal control system of this microbeam plasma welding machine comprises initialization, preset parameter, system's adjustment and welds four parts.
Said initialization procedure comprises:
1. system initialization;
2. input and output initialization;
3. interrupt system initialization;
4. friendly interface initialization;
5. initialization finishes, and enters the process switch and detects.
Said preset parameter process comprises:
1. switch is put the preset parameter position;
2. display parameters preset the interface;
3. select cursor is moved to the option that will carry out preset parameter by function key;
4. import or revise parameter values;
5. cursor being moved to next parameter that need preset line parameter of going forward side by side presets;
6. finish until all preset parameters or modification;
7. press end key, return beginning;
Said welding process comprises the following steps:
1. welding process starts by arc welding gun switch control, makes arc welding gun switch be in enable position;
2. digital signal processor starts the Air Valve Control relay by the SECO interface and opens gas circuit and carry out pre-gas, through certain pre-gas after the time;
3. digital signal processor starts little arc start and stop control relay by the SECO interface and opens little arc power;
4. digital signal processor starts striking start and stop control relay by the SECO interface and opens arc initiation device and draw little arc; And constantly detect little arc loop current, ignite until little arc;
5. digital signal processor is opened main arc power source by SECO interface startup minor arc start and stop control relay, i.e. alternation of hosts's arc;
6. digital signal processor constantly detects the minor arc electric current by the main arc power source interface circuit, if do not ignite the minor arc electric current, then continue alternation of hosts's arc, otherwise enter minor arc electric current ascent stage, reach the welding current of actual requirement until the minor arc electric current, enter the welding plateau;
7. the CPU of digital signal processor constantly carries out the processing of information gathering and data, constantly adjusts parameter, to obtain constant welding current;
8. the CPU of digital signal processor constantly detects arc welding gun switch by man-machine dialogue interface simultaneously, and when detecting arc welding gun switch and be in end position, digital signal processor cuts out arc welding gun switch by the dialogue on human rights interface, enters terminal procedure;
9. terminal procedure, welding current descends by certain slope, and when the minor arc electric current reduced to 0, digital signal processor cut out main arc power source by SECO interface disconnection minor arc start and stop control relay, disconnects little arc start and stop control relay, turns down arc power;
10. prolong the gas time through one section then, disconnect Air Valve Control cut-off gas circuit by the SECO interface;
The welding process finishes.
Technique effect of the present invention:
Adopted the digital signal chip TMS320F240 of 2000 systems of American TI Company in the technical scheme of the present invention, utilize its various abundant algorithm software programs, carrying out field data fast handles, as digital signal processing filter, Fast Fourier Transform (FFT) etc., and realize more complete control law, as PID control law, the minimum control law etc. of clapping.Simultaneously, utilize its superior sheet inner peripheral interface, finish interface and communication with complicated MICROBEAM PLASMA WELDING equipment as 28 I/O parallel interfaces, 16 road A/D translation interfaces, 12 road pwm signal G-interfaces, 3 road timer/counter interfaces, realize perfect man-machine interactive system simultaneously.In addition, utilize the comparatively complete real-time monitoring system of this chip and " house dog " system, guarantee the reliability service of entire equipment.
Description of drawings:
Fig. 1 is the structured flowchart of microbeam plasma welding machine digital signal control system of the present invention.
Fig. 2 is a control system control principle flow chart of the present invention.
Fig. 3 is a control system parameter keyboard initialization process flow chart of the present invention.
Fig. 4 is a control system welding process flow chart of the present invention.
Concrete real-time mode:
Fig. 1 is the structured flowchart of microbeam plasma welding machine digital signal control system of the present invention preferred embodiment.As seen from the figure, microbeam plasma welding machine digital signal control system of the present invention comprises main arc power source 2 and main arc power source start and stop control relay 9, little arc power 6 and start and stop control relay 7 thereof, arc initiation device 10 and start and stop control relay 11 thereof, gas circuit 4 and Air Valve Control relay 5 thereof, water route 13 and hydraulic pressure switch 14 thereof, keyboard 16, liquid crystal digital shows 17, process switch 18, arc welding gun switch 19, water, electricity and gas failure detector circuit 21 and fault alarm indicator lamp 22 are characterized in:
1. adopted the digital signal chip TMS320F240 of 2000 series of American TI Company to make central processing unit;
2. between Air Valve Control relay 5, little arc power start and stop control relay 7, main arc power source control relay 9, striking start and stop control relay 11 and digital signal processor 1, be provided with SECO interface 12;
3. between keyboard 16, liquid crystal digital demonstration 17, process switch 18 and arc welding gun switch 19 and digital signal processor 1, be provided with man-machine dialogue interface 20;
4. being provided with hydraulic pressure switch between hydraulic pressure switch 14 and digital signal processor 1 detects and interface 15;
5. between water, electricity and gas failure detector circuit 21 and fault alarm indicator lamp 22 and digital signal processor 1, be provided with fault interface circuit 23;
6. between main arc power source 2 and digital signal processor 1, also be provided with the main arc power source interface circuit 3 that detects and control main arc power source work.
The controll plant of the digital signal control system of microbeam plasma welding machine of the present invention comprises water route, gas circuit, power supply, arc initiation device, interactive system and failure system.Water circuit system is that the hydraulic pressure switch 14 in 1 pair of water route 13 of digital signal processor detects through hydraulic pressure switch and interface circuit 15 detects; Air-channel system then is that digital signal processor 1 is exported control signals through SECO interface 12, and 5 actions of control Air Valve Control relay are to be switched on or switched off gas circuit 4; Power-supply system comprises little arc power system 6 and main arc power source system 2, wherein, 6 of little arc power systems carry out start and stop control, be that digital signal processor 1 is through SECO interface 12 output control signals, control little arc start and stop control relay 7 actions, to be switched on or switched off little arc power 6, main arc power source 8 need carry out start and stop control and quality control, start and stop control for main arc power source 8, carrying out start and stop with 6 of little arc powers controls the same, export control signals by digital signal processor 1 through SECO interface 12,9 actions of control minor arc start and stop control relay, to be switched on or switched off main arc power source 8, for its quality control, then be the size control of carrying out welding current, on the one hand by the control signal of digital signal processor 1 through main arc power source interface circuit 3 output control welding currents, regularly detect welding current by digital signal processor 1 through main arc power source interface circuit 3 on the other hand, compare with given signal by digital signal processor 1 inner setting, according to result relatively, constantly adjust the control signal of output by computing, so that welding current reaches constant output; The control of arc initiation device 10 also is to export control signals by digital signal processor 1 through SECO interface 12, and 11 actions of control striking start and stop control relay are to be switched on or switched off arc initiation device 10; Interactive system, the one, carry out the detection of execute-in-place switch by digital signal processor 1 through man-machine dialogue interface 20, mainly contain process switch 18 and arc welding gun switch 19; The 2nd, carry out on-site parameters by digital signal processor 1 through man-machine dialogue interface 20 and preset and on-the-spot demonstration, the former carries out preset parameter by keyboard 16, and the latter shows by digital display screen 17; Failure system then is to be detected by the water, electricity, gas of digital signal processor 1 through fault interface circuit 23,21 pairs of scenes of failure detector circuit, if their work is undesired, then digital signal processor 1 sends corresponding failure alarm signal through fault interface circuit 23, and by alarm lamp 22 display alarms.
Fig. 2 is control system control principle flow chart among the present invention.The Digital Signals process of microbeam plasma welding machine mainly comprises initialization, preset parameter, system's adjustment and welds 4 modules.Wherein, preset parameter, welding, 3 processes of system's adjustment decide specifically enter which process by the testing result of process switch detection 29.When detecting process switch 18 in the welding position 30, then enter into welding process 31, finish 32 until welding process, be back to beginning 24 through 39; When detecting process switch 18 in preset parameter position 33, then enter into preset parameter process 34, finish 35 until the preset parameter process, be back to beginning 24 through 39; When detecting process switch 18 at rest position 36, then enter system's adjustment process 37, when system's adjustment process 38 finishes, be back to beginning 24 through 39.Initialization comprises system initialization 25, input and output initialization 26, interrupt system initialization 27, shows friendly interface 28 totally 5 steps, and whole procedure is entered by beginning 24, is back to beginning through 39 during end.
Flow process at preset parameter process and welding process is further described below.
Fig. 3 is the flow chart of control system parameter keyboard initialization process of the present invention.Keyboard presets and has 14 keys, and wherein 0,1,2,3,4,5,6,7,8,9 is 10 numerical keys, and it is 4 function keys that " moving to left ", " moving to right ", " carriage return " reach " end ".The numerical key of main minute button is handled and function key is handled so the keyboard of parameter presets, and before this, at first judges to have or not key to press, if there is key to press, then judges it is numerical key or function key.This program presets interface 40 beginnings by display parameters, the operator carries out keyboard preset parameter 41, CPU keyboard scan 42, and judged whether that key presses 43, if no key is pressed, continue keyboard scan 42,, then carry out key identification 44 if there is key to press, differentiation is numerical key or function key, if numerical key 45 then carries out numerical key and handles 46, and carries out numeral demonstration 47 in preassigned position; If function key 48 is then carried out function key and is handled 49, and differentiates whether be end key 50 simultaneously, if not end key then continues keyboard scan 42, handle 51 otherwise carry out preset parameter, finish preset parameter 52.
Fig. 4 is the flow chart of control system welding process of the present invention.Welding process is divided into start-up course and terminal procedure, total pre-gas, draw little arc, alternation of hosts's arc, rising, welding steadily, descend, prolong gas totally 7 stages, wherein, pre-gas, draw the start-up course that little arc, alternation of hosts's arc, rising, welding plateau are formed welding process, descending, prolong the gas stage then constitutes the terminal procedure of welding process, and these two processes are by arc welding gun switch 19 controls.
Said welding process comprises the following steps:
1. welding process starts by arc welding gun switch 19 controls, makes arc welding gun switch 19 be in enable position 55;
2. digital signal processor 1 starts Air Valve Control relays 5 by SECO interface 12 and opens gas circuit 4 and carry out pre-gas 56, through certain pre-gas after the time;
3. digital signal processor 1 is opened little arc power 6 by the little arc start and stop control relay 7 of SECO interface 12 startups;
4. digital signal processor 1 starts striking start and stop control relays 11 by SECO interface 12 and opens arc initiation device 10 and draw little arc 57, and constantly detects little arc current 58, when little arc does not ignite, continues to draw little arc 59, and when igniting little arc, drawing the little arc stage finishes;
5. digital signal processor 1 is opened main arc power source 2 by SECO interface 12 startup minor arc start and stop control relays 9, and promptly alternation of hosts's arc 60;
6. digital signal processor 1 constantly detects minor arc electric current 61 by main arc power source interface circuit 3, if do not ignite the minor arc electric current, then continue alternation of hosts's arc 62, otherwise enter minor arc electric current ascent stage 63, welding current rises by certain slope, reach the welding current of actual requirement until the minor arc electric current, enter welding plateau 64;
7. the CPU of digital signal processor 1 constantly carries out information gathering and data processing 65, constantly adjusts parameter 66, to obtain constant welding current;
8. the CPU of digital signal processor 1 constantly detects arc welding gun switch 19 by man-machine dialogue interface 20 simultaneously, when detecting arc welding gun switch 19 and be in end position 67, digital signal processor 1 cuts out arc welding gun switch 19 by man-machine dialogue interface 20, enters terminal procedure;
9. terminal procedure 68, and welding current descends by certain slope, when the minor arc electric current reduces to 0, digital signal processor 1 disconnects minor arc start and stop control relay 9 by SECO interface 12, close main arc power source 71, disconnect little arc start and stop control relay 7, turn down arc power 72;
10. prolong the gas time through one section then, disconnect Air Valve Control relay 5 by SECO interface 12 and close gas circuit 74;
The welding process finishes 75.
The most outstanding advantage of the present invention is to utilize the various abundant algorithm software programs of TMS320F240 chip, Digital Signal Processing, carry out field data processing fast, realize complete control law, simultaneously, utilize its superior sheet inner peripheral interface, finish interface and communication with complicated MICROBEAM PLASMA WELDING equipment, realize perfect man-machine interactive system.And make the MICROBEAM PLASMA WELDING process rise to the height of the intellectuality control of Self Adaptive Control and self study process, make microbeam plasma welding machine have advanced person, novelty and high-grade characteristics by its control.
Claims (6)
1, a kind of digital signal control system of microbeam plasma welding machine, comprise main arc power source (2) and main arc power source start and stop control relay (9), little arc power (6) and start and stop control relay (7) thereof, arc initiation device (10) and start and stop control relay (11) thereof, gas circuit (4) and Air Valve Control relay (5) thereof, water route (13) and hydraulic pressure switch (14) thereof, keyboard (16), liquid crystal digital shows (17), process switch (18), arc welding gun switch (19), water, electricity and gas failure detector circuit (21) and fault alarm indicator lamp (22) is characterized in that:
1. adopt digital signal processor (1) to make central processing unit;
2. between Air Valve Control relay (5), little arc power start and stop control relay (7), main arc power source control relay (9), striking start and stop control relay (11) and digital signal processor (1), be provided with SECO interface (12);
3. show between (17), process switch (18) and arc welding gun switch (19) and the digital signal processor (1) at keyboard (16), liquid crystal digital and be provided with man-machine dialogue interface (20);
4. being provided with hydraulic pressure switch between hydraulic pressure switch (14) and digital signal processor (1) detects and interface (15);
5. between water, electricity and gas failure detector circuit (21) and fault alarm indicator lamp (22) and digital signal processor (1), be provided with fault interface circuit (23);
6. between main arc power source (2) and digital signal processor (1), also be provided with the main arc power source interface circuit (3) that detects and control main arc power source work.
2, the digital signal control system of microbeam plasma welding machine according to claim 1, that it is characterized in that described digital signal processor (1) employing is the digital signal chip TMS320F240 of 2000 series of American TI Company.
3, the digital signal control system of microbeam plasma welding machine according to claim 1 and 2 is characterized in that its control procedure comprises initialization, preset parameter, system's adjustment and welds four parts.
4, the digital signal control system of microbeam plasma welding machine according to claim 3 is characterized in that said initialization procedure comprises:
1. system initialization;
2. input and output initialization;
3. interrupt system initialization;
4. friendly interface initialization;
5. initialization finishes, and enters the process switch and detects.
5, the digital signal control system of microbeam plasma welding machine according to claim 3 is characterized in that said preset parameter process comprises:
1. switch is put the preset parameter position;
2. display parameters preset the interface;
3. select cursor is moved to the option that will carry out preset parameter by function key;
4. import or revise parameter values;
5. cursor being moved to next parameter that need preset line parameter of going forward side by side presets;
6. finish until all preset parameters or modification;
7. press end key, return beginning (24).
6, the digital signal control system of microbeam plasma welding machine according to claim 3 is characterized in that said welding process comprises the following steps:
1. welding process starts by arc welding gun switch (19) control, makes arc welding gun switch (19) be in enable position;
2. digital signal processor (1) starts Air Valve Control relay (5) by SECO interface (12) and opens gas circuit (4) and carry out pre-gas, through certain pre-gas after the time;
3. digital signal processor (1) is opened little arc power (6) by SECO interface (12) the little arc start and stop control relay of startup (7);
4. digital signal processor (1) starts striking start and stop control relays (11) by SECO interface (12) and opens arc initiation device (10) and draw little arc;
5. digital signal processor (1) is opened main arc power source (2), i.e. alternation of hosts's arc by SECO interface (12) startup minor arc start and stop control relays (9);
6. digital signal processor (1) constantly detects the minor arc electric current by main arc power source interface circuit (3), if do not ignite the minor arc electric current, then continue alternation of hosts's arc, otherwise enter minor arc electric current ascent stage, reach the welding current of actual requirement until the minor arc electric current, enter the welding plateau;
7. the CPU of digital signal processor (1) constantly carries out the processing of information gathering and data, constantly adjusts parameter, to obtain constant welding current;
8. the CPU of digital signal processor (1) constantly detects arc welding gun switch (19) by man-machine dialogue interface (20) simultaneously, when detecting arc welding gun switch (19) when being in end position, digital signal processor (1) cuts out arc welding gun switch (19) by dialogue on human rights interface (20), enters terminal procedure;
9. terminal procedure, welding current descends by certain slope, when the minor arc electric current reduces to 0, digital signal processor (1) disconnects minor arc start and stop control relays (9) by SECO interface (12), close main arc power source (2), disconnect little arc start and stop control relay (7), turn down arc power (6);
10. prolong the gas time through one section then, disconnect Air Valve Control relay (5) by SECO interface (12) and close gas circuit (4);
The welding process finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021112568A CN1173793C (en) | 2002-04-04 | 2002-04-04 | Digital signal control system for microbeam plasma welding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021112568A CN1173793C (en) | 2002-04-04 | 2002-04-04 | Digital signal control system for microbeam plasma welding machine |
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| CN1173793C true CN1173793C (en) | 2004-11-03 |
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| CNB021112568A Expired - Fee Related CN1173793C (en) | 2002-04-04 | 2002-04-04 | Digital signal control system for microbeam plasma welding machine |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323791C (en) * | 2004-01-16 | 2007-07-04 | 上海威特力焊接设备制造有限公司 | Welding machine fault detecting and protecting system, and its method |
| CN1323792C (en) * | 2004-01-17 | 2007-07-04 | 上海威特力焊接设备制造有限公司 | Welding machine output characteristic control method |
| CN101396753B (en) * | 2008-10-07 | 2011-02-09 | 上海工程技术大学 | High-frequency micro-beam plasma arc welding main-arc power-supply main circuit |
| CN101986370B (en) * | 2009-07-29 | 2012-06-13 | 上海工程技术大学 | Arc striking method for electric arc welding simulation training machine |
| CN104959720B (en) * | 2015-07-24 | 2017-06-23 | 上海沪工焊接集团股份有限公司 | Air plasma cutter sequential control method |
| JP6728022B2 (en) * | 2016-11-07 | 2020-07-22 | 株式会社ダイヘン | Arc start control method for plasma arc welding |
| CN111545883A (en) * | 2020-05-14 | 2020-08-18 | 上海气焊机厂有限公司 | Cutting machine control method and control device |
| CN111930034A (en) * | 2020-07-20 | 2020-11-13 | 安徽联维新能源科技有限公司 | Solar photovoltaic monitoring system |
| CN112894205A (en) * | 2021-01-16 | 2021-06-04 | 佛山市广凡机器人有限公司 | Robot control system for welding |
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2002
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