CN1943960A - Coordinate control method for laser-electric arc composite welding - Google Patents
Coordinate control method for laser-electric arc composite welding Download PDFInfo
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- CN1943960A CN1943960A CN 200610048081 CN200610048081A CN1943960A CN 1943960 A CN1943960 A CN 1943960A CN 200610048081 CN200610048081 CN 200610048081 CN 200610048081 A CN200610048081 A CN 200610048081A CN 1943960 A CN1943960 A CN 1943960A
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Abstract
The present invention belongs to the field of material engineering technology, and is especially one kind of composite welding cooperating control method. One DLA closed-loop control system for the relative positions of laser and arc is established by means of industrial control computer and infrared imaging analysis technology, high speed video camera technology or other means. During the composite laser-arc heat source welding, the DLA closed-loop control system maintains the DLA set unchanged or regulate automatically based on the practical welding condition. The present invention has the positive effects of automatic control on the micro structure of welded joint, high welding quality, raised adoptability of the composite heat source, high automation, high welding stability and great industrial application foreground.
Description
Technical field
The invention belongs to field of material engineering technology, relate to a kind of welding control method for coordinating, particularly a kind of composite welding control method for coordinating.
Background technology
When laser and arcing in common region, laser and electric arc exist and interact, and are the The laser-arc hybrid welding technology of normal theory.Studies show that The laser-arc hybrid welding is not that two single sources simply superpose, but exist complicated coupling effect between the two, and the position parameter that best embodies this composite effect is exactly the mutual alignment (D between laser and the electric arc
LA).When laser and TIG electric arc or the electric arc combined welding of MIG, D
LASize directly influence welding penetration.Along with D
LAThe fusion penetration that diminishes increases, but unsuitable too small, because shine the molten bath central part when laser beam, causes that easily the deposite metal evaporates hastily and splash, and causes the face of weld moulding relatively poor.Therefore in order to obtain uniform fusion penetration and good surface forming, D
LASize must select according to materials to be welded and thickness of slab.But in the composite welding process, because the surface height variation of workpiece and the scaling loss of TIG or MIG electrode must cause D
LAFollow and change, need in welding process, carry out real-time D for this reason
LAAdjust.In addition, D
LAReal-time control can improve the Energy distribution state of composite heat power supply, therefore by coordinating control D
LASize can change the welding point temperature field and distribute, improve welding point tissue thereby reach, the purpose of raising property of welded joint.
Summary of the invention
In order to solve the deficiency of existing The laser-arc hybrid welding method, the present invention proposes a kind of hybrid Laser-Arc Welding control method for coordinating, it has solved in the existing laser-electric arc compound welding technology because D
LAThe a series of problems that are difficult to realize controlling and occur.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of new pattern laser-electric arc combined welding control method for coordinating, this method is in the laser-electric arc composite heat source material processing, adopts high speed video system, infrared thermal imagery analytical system and industrial computer to set up laser and electric arc mutual alignment D
LAClosed-loop control system.The step of concrete control method for coordinating is: one, according to material to be processed and thickness of slab, utilize industrial computer to preset the welding condition of laser power 200W-10kW, arc power 500W-5kW, shield gas flow rate 5L/min-25L/min; Two, in laser-electric arc composite welding process, utilize high speed video system 3, infrared thermal imagery analytical technology or mode that both combine to catch laser and electric arc interaction picture in real time, measure D
LAValue; Three, the initial value with measured value and predetermined set compares, and calculated difference, and this difference is passed to the industrial computer control system; Four, industrial computer feeds back to mechanical movement means by closed-loop control system with control signal, thereby realizes D
LAClosed loop coordinate control, wherein, the distance D between laser-impact point and the electric arc melting bath center
LABe 1 ~ 6mm, electrode 2 most advanced and sophisticated distance h to workpiece are 1-5mm.
The electric arc type is TIG electric arc, MIG electric arc, MAG electric arc or plasma arc.Type of laser is YAG Solid State Laser bundle, CO
2Gas laser beam or diode laser bundle.
In the The laser-arc hybrid welding process, utilize this D
LAThe closed loop coordinated control system makes D
LAIt is constant to keep not putting size, or adjusts automatically according to the actual welding situation.The complex method of this method is: laser is coaxial or paraxonic with electric arc.
The invention has the beneficial effects as follows: 1) utilize D
LAThe closed loop control method for coordinating can be controlled the couple state of two kinds of thermals source in real time, promptly controls the input of composite heat power supply welding energy, realizes the automatic control to the welding point microstructure, thereby reaches the purpose that guarantees quality of weld joint.2) D
LAThe application of closed loop control method for coordinating can improve the applicability of The laser-arc hybrid welding technology, improves the automaticity in the actual production process.3) D
LAThe application of closed loop control method for coordinating can improve welding process stability, obtains continuous good quality solder joints.This new pattern laser-arc composite heat source technology can be utilized the energy of laser and electric arc to greatest extent, compares with existing laser-electric arc composite heat source process technology to have great advantage.No matter consider that from technological angle and economic angle very big commercial Application potentiality and development prospect are all arranged.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a laser-electric arc composite welding device schematic diagram of the present invention.
1. laser beams among the figure, 2. arc electrodes, 3. high speed video system.
The specific embodiment
Present embodiment adopts paraxonic laser-electric arc composite heat source device, and adopting the high-speed camera acquisition system is example, consults relative position shown in Figure 1.Wherein the angle between laser beam 1 and the arc electrodes 2 is 45 °; Laser beam 1 percussion point and arc electrodes 2 welding pool centre distance D
LABe 2mm; Electrode 2 most advanced and sophisticated distance h to workpiece are 2mm; High speed video system 3 is fixed together with the compound welding gun of being made up of laser transmission apparatus and arc electrodes.Control method for coordinating example:, utilize industrial computer to preset welding conditions such as laser power, arc power, shield gas flow rate according to material to be processed and thickness of slab.In laser-electric arc composite welding process, utilize high speed video system 3 to catch laser and the mutual picture of electric arc in real time, measure D
LAValue.The initial value of measured value and predetermined set is compared, and calculated difference, this difference is passed to the industrial computer control system.Industrial computer feeds back to mechanical movement means by closed-loop control system with control signal, thereby realizes D
LAClosed loop coordinate control.The closed loop coordinated control system that the present invention is set up can real-time tracking, monitoring D
LAVariation, according to the parameter variation range that presets, control D in real time
LASize, thereby realize D
LAClosed loop coordinate control.Adopt this mode, on the one hand laser energy and arc energy are not fully exerted, significantly reduce energy resource consumption, improve working (machining) efficiency.Can improve laser-electric arc composite welding automaticity on the other hand, improve the welding point shaping surface.
Claims (3)
1, a kind of new pattern laser-electric arc combined welding control method for coordinating, it is characterized in that, this method is in the laser-electric arc composite heat source material processing, to adopt high speed video system, infrared thermal imagery analytical system and industrial computer to set up laser and electric arc mutual alignment (D
LA) closed-loop control system, the step of concrete control method for coordinating is: one, according to material to be processed and thickness of slab, utilize industrial computer to preset the welding condition of laser power 200W-10kW, arc power 500W-5kW, shield gas flow rate 5L/min-25L/min;
Two, in laser-electric arc composite welding process, utilize high speed video system (3), infrared thermal imagery analytical technology or mode that both combine to catch laser and electric arc interaction picture in real time, measure (D
LA) value;
Three, the initial value with measured value and predetermined set compares, and calculated difference, and this difference is passed to the industrial computer control system;
Four, industrial computer feeds back to mechanical movement means by closed-loop control system with control signal, thereby realizes D
LAClosed loop coordinate control, wherein, the distance (D between laser-impact point and the electric arc melting bath center
LA) be 1 ~ 6mm, the most advanced and sophisticated distance (h) to workpiece of electrode (2) is 1-5mm.
2, a kind of new pattern laser according to claim 1-electric arc combined welding control method for coordinating is characterized in that, the electric arc type is TIG electric arc, MIG electric arc, MAG electric arc or plasma arc.
3, a kind of new pattern laser according to claim 1-electric arc combined welding control method for coordinating is characterized in that, type of laser is YAG Solid State Laser bundle, CO
2Gas laser beam or diode laser bundle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610048081 CN1943960A (en) | 2006-10-20 | 2006-10-20 | Coordinate control method for laser-electric arc composite welding |
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| CN 200610048081 CN1943960A (en) | 2006-10-20 | 2006-10-20 | Coordinate control method for laser-electric arc composite welding |
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| CN1943960A true CN1943960A (en) | 2007-04-11 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111767A (en) * | 2013-02-19 | 2013-05-22 | 鞍山煜宸科技有限公司 | Control method and device of laser-arc hybrid welding |
| CN104698332A (en) * | 2015-03-11 | 2015-06-10 | 西安交通大学 | Synchronous measuring device and method of arc and contact moving process based on laser imaging |
| CN106425144A (en) * | 2016-12-02 | 2017-02-22 | 机械科学研究总院青岛分院 | Composite welding device and composite welding method |
| CN106825953A (en) * | 2017-01-22 | 2017-06-13 | 大连理工大学 | A kind of hybrid Laser-Arc Welding real-time monitoring system and its regulation and control method |
| CN108581207A (en) * | 2018-07-03 | 2018-09-28 | 哈尔滨工业大学（威海） | A kind of the chevilled silk spacing real-time adaptive regulating system and adjusting method of laser-arc hybrid welding in industry |
| CN109202291A (en) * | 2018-11-01 | 2019-01-15 | 大连理工大学 | A kind of pulse laser induced arc-welding method for inhibiting plate sheet welding to burn defect |
| CN114043092A (en) * | 2021-12-10 | 2022-02-15 | 哈尔滨工业大学 | Point ring laser and electric arc composite welding method |
| CN114769882A (en) * | 2022-04-25 | 2022-07-22 | 广船国际有限公司 | Welding equipment and steel plate welding method |
-
2006
- 2006-10-20 CN CN 200610048081 patent/CN1943960A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111767B (en) * | 2013-02-19 | 2015-04-15 | 鞍山煜宸科技有限公司 | Control method and device of laser-arc hybrid welding |
| CN103111767A (en) * | 2013-02-19 | 2013-05-22 | 鞍山煜宸科技有限公司 | Control method and device of laser-arc hybrid welding |
| CN104698332B (en) * | 2015-03-11 | 2018-01-19 | 西安交通大学 | The synchronous measuring apparatus and method of electric arc and contact motion process based on laser imaging |
| CN104698332A (en) * | 2015-03-11 | 2015-06-10 | 西安交通大学 | Synchronous measuring device and method of arc and contact moving process based on laser imaging |
| CN106425144A (en) * | 2016-12-02 | 2017-02-22 | 机械科学研究总院青岛分院 | Composite welding device and composite welding method |
| CN106825953B (en) * | 2017-01-22 | 2018-09-04 | 大连理工大学 | A kind of laser-arc hybrid welding in industry real-time monitoring system and its regulation and control method |
| CN106825953A (en) * | 2017-01-22 | 2017-06-13 | 大连理工大学 | A kind of hybrid Laser-Arc Welding real-time monitoring system and its regulation and control method |
| CN108581207A (en) * | 2018-07-03 | 2018-09-28 | 哈尔滨工业大学（威海） | A kind of the chevilled silk spacing real-time adaptive regulating system and adjusting method of laser-arc hybrid welding in industry |
| CN108581207B (en) * | 2018-07-03 | 2021-03-02 | 哈尔滨工业大学（威海） | Real-time self-adaptive adjusting system and method for light wire spacing of laser-arc hybrid welding |
| CN109202291A (en) * | 2018-11-01 | 2019-01-15 | 大连理工大学 | A kind of pulse laser induced arc-welding method for inhibiting plate sheet welding to burn defect |
| CN109202291B (en) * | 2018-11-01 | 2021-03-19 | 大连理工大学 | Pulse laser induced arc welding method for inhibiting sheet welding burn-through defect |
| CN114043092A (en) * | 2021-12-10 | 2022-02-15 | 哈尔滨工业大学 | Point ring laser and electric arc composite welding method |
| CN114043092B (en) * | 2021-12-10 | 2022-05-27 | 哈尔滨工业大学 | Point ring laser and electric arc composite welding method |
| CN114769882A (en) * | 2022-04-25 | 2022-07-22 | 广船国际有限公司 | Welding equipment and steel plate welding method |
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