Laser and laser + electric arc is compound heat source solders technical research and application (on)

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One, overview laser beam welding receives a technology to make the application in waiting for industrial domain in aerospace, shipbuilding, car extensive with each passing day, receive used device with respect to high-power laser beam welding only and character, what basically use at present is aeriform laser and solid laser. Solid laser and aeriform laser are compared, its wavelengh is short, beam of light can convey through optical fiber, can solder with machine support of the people private plane cooperates, have flexible the characteristic of automation, it is to solder the development way that uses laser. Harbin solders the institute is the research organization that our country develops high-power solid laser beam welding the earliest to receive a technology. In last few years, harbin solders forward position of international of institute follow closely solders technology, the key is right high-power solid laser (Nd: YAG) + electric arc is compound heat source solders the technology has research and application development. Reach laser to popularize laser + electric arc is compound heat source solders the technology produces the application in the domain in our country, article key solders to Harbin the laser that the institute undertakes and laser + the research achievement that compound heat source solders and applied circumstance undertake electric arc brief introduction. 2, the research that laser beam welding accepts a technology and application 1.

The research Harbin that laser beam welding receives a technology solders research is in 20 centuries 90 time metaphase, introduced 2k W Nd of German HAAS company: YAG solid laser, the key began the laser beam welding that is based on nerve network to receive parameter to be opposite welding line appearance (advocate if welding line frit is deep) forecast research, the research of this respect can receive parameter to forecast welding line frit according to different laser beam welding already deep, at the same time can the frit with different basis is deep give out effective laser beam welding receives parameter, this considers to have important direct sense with production to the experiment. To monitor laser deep fusion welding receives the alveolus stability in the process, harbin solders home of institute rate preexistence began Nd: YAG laser beam welding receives process coaxial vision to conduct the research of feeling technology. Nd: YAG laser beam welding receives process coaxial vision to pass feeling system to be able to achieve alveolus status not only monitor and study, the frit of welding line of the implementation that monitor that still can be based on pair of alveolus configuration detects greatly and workpiece solder is appeared detect. Welding line frit detects greatly value and experimental value make clear quite, workpiece not frit of the welding line when solder is appeared detects greatly the error does not exceed 12 % ; commonly and detect greatly in frit of the welding line after workpiece solder is appeared the value is more than workpiece ply apparently. Accordingly, frit of the welding line after be based on workpiece solder to appear detects greatly the comparison of value and workpiece ply can detect the case that workpiece solder shows. Graph 1 expect to use carbolic steel products, laser power 1200W, solder speed 1.

8m/ Min, laser focal length is located in workpiece apparently when the image of alveolus coaxial vision that collects, the three-dimensional gray scale that the graph extracts on the 2 foundations that are the image of alveolus coaxial vision that collecting pursues. 2.

The applied Harbin that laser beam welding receives a technology solders the laser beam welding that the institute develops receives a technology to apply in civil production domain basically is car manufacturing industry, the product of main application has car gear-box gang gear to solder, of gear-box gear and axis solder, the car uses what car steering gear aids force oil cylinder to solder (of 3) seeing a picture and bracket of limousine car light solder (4) seeing a picture. Among them the welding line form that the car helps the welding line form of force oil cylinder be bracket of light of limousine car of; of welding line of the shape of a saddle-a falling-off between two peak periods with car steering gear is a space three-dimensional curve welding line. Use laser - robot three dimensional space solders the technology makes a space three-dimensional of welding line solder become relaxed freely. Graph the bracket of 5 limousine car light in soldering to be in. In addition, harbin solders the institute still receives laser beam welding what the technology uses stainless steel conveyer belt to solder, stainless steel is electronic-controlled of switch ark solder, of radiator of stainless steel of new-style Bao Bi solder (the civil product such as 6) seeing a picture creates a field. Weaponry of for military use uses accurate instrument part soldering also is Harbin solders institute laser beam welding receives a technology fundamental application domain. 3, laser + electric arc is compound solder technical research and application 1.

Laser + electric arc is compound heat source solders the technology studies " laser + electric arc is compound heat source solders " be a kind new-style solder method, this kind new-style solder the tall adaptability that the method has general arc welding already characteristic, have laser to regard as again solder the big frit of heat source is deep, high speed, low be out of shape characteristic, it is what in last few years rapid development rises is high grade and efficient solder technology. Harbin solders institute laser + electric arc is compound heat source solders research development of the technology basically is aimed at high-power solid laser (Nd: Of electric arc of YAG) + GMAW compound, the direction of research basically has mild steel laser + short circuit transfers MAG electric arc is compound heat source solders characteristic, aluminous / Nd of steel big facula: YAG laser + pulse MIG compound heat source is efficient frit - drill rod solders technology and laser of solid of high-power of excel in aluminium alloy (Nd: Electric arc of MIG of YAG) + pulse is compound heat source solders the technology. (Laser of 1) mild steel + electric arc of MAG short circuit is compound heat source solders character considers to make clear, arc welding of alone short circuit MAG is soldering lesserly electric current (60A) of 30 ～ and taller solder the (below speed>1.

5m/ Min) , gain stability very hard solder process. Graph 7 transfer for short circuit MAG arc welding, when 16V of electric arc voltage, solder voltaic 50A, solder speed 1.

The weaveform of voltage electric current when 5m/ Min pursues. Here short circuit transfers laser is joined on the foundation of electric arc, and laser power exceeds 900 W, be located in area of mode of deep fusion welding, stable short circuit process also can be obtained below the condition that solders in high speed. Graph 8 it is 16V for electric arc voltage, solder voltaic 50A, solder speed 1.

5m/ Min, laser power 1200 W is compound weaveform of the voltage when soldering, electric current pursues. Electric arc of MAG of short circuit of small electric current and high-power laser are compound have high speed, low be out of shape solder characteristic, apply to those who have clearance thin plate to solder. Graph data of the 9 steel that it is carbon varies the butt joint of ply board (board thick 1.

2mm+ 1.

8mm) , butt joint clearance 0.

The welding line figuration when 7mm, experiment condition is solder voltage 14V, solder voltaic 50A, laser power 2000W, solder speed 2m/ Min. CNC Milling CNC Machining