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

5mm) takes the welding line take shape when receiving solder, solder the condition is laser power 700 W, 17V of ～ of 16 of electric arc voltage, solder 120A of ～ of voltaic 110, solder speed 2m/min. The electric current that transfers when short circuit is bigger (160A) of 100 ～ , the 2000 W of ～ of laser power 900 of compound solder, be located in area of mode of deep fusion welding, laser and short circuit transfer characteristic of compound of MAG electric arc is the frit that can add welding line significantly is mixed greatly deep wide than, this one characteristic makes in thick board in multilayer groove angle decreases when multi-pass welding, rise solder efficiency becomes a possibility. Graph 11 expect to use carbolic steel products (ply 10mm) is alone MAG solder and laser + short circuit transfers the comparison of figuration of the welding line when MAG solder. Solder when the condition is MAG solder, slope quarrel spends 60 ° , 22V of ～ of 19 of electric arc voltage, solder electric current 165 ～ 190A, solder speed 0.

5 ～ 0.

6m/min, of the welding line of 4 solder line that finish solder. Compound when soldering, slope quarrel spends 30 ° , laser power 2000 W, 22V of ～ of 19 of electric arc voltage, solder 190A of ～ of voltaic 165, solder speed 0.

5 ～ 0.

6m/ Min, of the welding line of two solder line that finish solder. (Laser of solid of high-power of material of 2) aluminium alloy (Nd: Electric arc of MIG of YAG) + pulse is compound heat source solders the technology is research target with aluminium alloy of 5A06 (LF6) , studied aluminium alloy laser + electric arc solders when compound solder the influence rule with the profound to welding line frit change of parameter. Consider to make clear, identical solder below hot input, the welding line frit that compound solder obtains is deep the; of pulse MIG solder that is more than identical electric current obtains the condition with deep frit of same welding line to fall, the photograph of pulse MIG solder of compound solder and identical electric current is taller than having solder speed, lower heat is inputted and smaller be out of shape. Graph 12 for frit of same welding line deep condition falls, the solder when compound solder and solder of alone pulse MIG fast, solder the comparison of hot input. The experiment returns solder of pair of alone pulse MIG and laser + the welding line figuration of pulse MIG solder had trade off study, when research shows the power when heat source of MIG electric arc is lesser, because aluminium alloy solders heat conduction is fast, after welding wire is fused be hard to as wet as embellish of mother capable person, it is accumulation only in welding line surface. After the laser of compound on the foundation of electric arc certain energy, the Yu Gao that dropped welding line and frit are wide than, fused metal is OK as good as Mu Cailiang profit is wet. The power when heat source of MIG electric arc is greater and solder when rate is rapidder, because welding line cooling rate is rapid, the exterior pulling force of bath metal is larger, create the hump welding line of discontinuous sex thereby. If be on this foundation the laser heat source of compound and certain power, can lower the cooling rate of welding line, reduce the exterior pulling force of bath metal, obtain successive welding line figuration thereby. Graph figuration of exterior of the 13 welding line when soldering for high speed of 5A06 aluminium alloy. (3) is aluminous / Nd of steel big facula: YAG laser + pulse MIG compound heat source is efficient frit - drill rod solders the technology is based on laser + electric arc is compound heat source solders in the process, laser energy is accurate and adjustable and laser has stable electric arc, improvement to solder process stability, rise solder the characteristic such as speed, put forward big facula laser - electric arc is compound heat source solders the method of heterogeneous metal. Use big facula Nd: YAG laser + pulse MIG compound heat source solders realized 5A02 aluminium alloy board as hot as armor plate of cold rolling galvanizing, cold rolling aluminum-plated steel board high grade and efficient frit - drill rod joins (aluminous mother capable person is fused solder, welding line joins for drill rod solder with steel mother capable person) , highest solder speed can be amounted to 5.

0m/ Min, of drawing sample rupture positional happening heats up influence area in aluminous mother capable person, the greatest tensile strength of contact can amount to capable person of 5A02 aluminium alloy mother of tensile strength 75% the left and right sides, adjacent at 5A02 aluminium alloy the intensity of connect of common and fused solder. Analysis of X ray diffraction makes clear, aluminous / steel frit - place of interface of join of solder of drill rod of connect of drill rod join made the compound between Fe3Al, FeAl2, Fe2Al5 and FeAl3 metal, the ply of compound layer is in 1.

4 μ of 5 ～ inside M limits, the intensity impact of the head of existence butt joint of the compound layer between Al- Fe metal is not big; Can chart analysis makes clear, atom of Al of place of interface of join of solder of contact drill rod, Fe diffuses sufficient. Graph 14 to use big facula Nd: YAG laser + pulse MIG compound heat source is efficient frit - drill rod solders the 5A02 aluminium alloy that the technology solders board the welding line with armor plate of cold rolling galvanizing. 2.

Laser + electric arc is compound heat source solders applied Harbin of the technology solders the laser that the institute will study successfully to develop + electric arc is compound heat source solders in the production that the technology used real product, typical product has stainless steel large indication screen housing (ply 1.

5mm, 160mm) of × of 650mm of dimension 900mm × solders, solved component part of large Bao Bi effectively solder be out of shape problem; Shock absorber of strong steel of excel in steel and freeboard steel body and cylindrical shell (1780MPa of ～ of intensity 1000, of 25mm) of ～ of ply 12 solder, solved effectively solder of crackle and chromic layer of plating of cylinder body lining burn what caustic reachs component part to be out of shape problem. Graph 15 to use laser + electric arc is compound heat source solders the technology solders shock absorber cylinder body. Harbin solders the institute is successful still with laser + electric arc is compound heat source solders the technology solved stainless steel double-faced and compound board (the ply of compound layer is in stainless steel 0.

15mm left and right sides, material is 0Cr18Ni9Ti, basic level uses data of Q235 mild steel, ply is in 1.

0 ～ 2.

Between 0mm) solder of contact corrode with be out of shape problem. In addition, harbin solders the institute is returned laser + electric arc is compound heat source solders in the rehabilitate that the technology used pattern of large aluminium alloy, solved rehabilitate of mould of large aluminium alloy successfully solder be out of shape problem. 4, epilogue Harbin solders research place laser and laser + electric arc is compound heat source solders the technology studies the respect did much work, better research achievement land applies in the production of real product, solved a variety of products to solder technical difficult problem. It is relatively mature that at present laser beam welding receives technology, and to laser + electric arc is compound heat source solders this anew model solder technology, its study the job basically is centered in this kind to solder on craft characteristic of the method, to laser + electric arc is compound the interaction mechanism of the laser when heat source solders and electric arc, solder the task such as the character of heat source remains to study further at going up from theory. CNC Milling CNC Machining