We know that numerous welding methods can be used for aluminum alloy according to different application occasions, along with blend welding, resistance welding, gas welding technique, various other welding methods such as plasma arc welding, electron light beam welding, vacuum cleaner diffusion welding can likewise be easily bonded with each other light weight aluminum alloy. The welder shall choose the proper technique based upon the material of light weight aluminum and also aluminum alloy, the density of the weldment, the price and also the weldability demands.

1. TIG welding

TIG has been commonly utilized in light weight aluminum alloy welding TIG welding in aluminum is characterized by warm concentration, arc security, weld steel thickness, however there are likewise easy to generate pores, must not be run under outside problems. It's generally used for welding medium thickness and also density of much less than 3 mm light weight aluminum alloy sheet, the workpiece deformation is significantly less than gas welding and hand arc welding

Air Conditioning TIG welding cathode has the cleansing result of eliminating oxide film, without flux, staying clear of the rust of the joint by residual flux and also slag after welding The joint kind can be unlimited, and also the weld is well formed as well as the surface is bright. The erosion of the welding zone by argon gas circulation speeds up the air conditioning of the joint, improves the structure and also buildings of the joint, and also appropriates for all-position welding

2. MIG welding

Automatic, semi-automatic MIG offer large welding arc power, warm concentration, tiny heat effect zone and has great production effectiveness, that's 2 ~ 3 times than that of manual TIG, can bu utilized for welding density of less than 50 mm aluminum and aluminum alloy plate. For example, the thickness of 30 mm welding light weight aluminum plate need not preheat, just need to weld the front and back layers to get a smooth surface area, good quality weld. Semi-automatic MIG appropriates for placing welds, short discontinuous welds and also welds with irregular framework form. Semi-automatic argon arc soldering iron can be made use of for practical and flexible welding, yet the size of WELDERMETALS semi-automatic welding cable is little, causing better sensitivity to bond porosity.

3. Resistance area welding

Resistance place welding has numerous advantages such as high production performance, conserving labor and minimizing price, but it additionally has some problems such as high welding existing and also weld flaws.

The experimental outcomes show that the resistance area welding can understand the efficient connection of 5052 light weight aluminum alloy joint, and can be identified by using ultrasonic C-scan. There are several aspects impacting the size of nugget as well as shear stamina of resistance spot welding joints, which raise with the rise of welding present and also welding time, as well as reduce with the rise of electrode stress. Compared with pure aluminum, the plastic deformation temperature area of aluminum alloy is narrow, the linear growth price is huge as well as the elongation is small, so it is needed to properly control the welding specifications to stay clear of splits as well as shrinkage holes. Resistance place welding can be utilized to bond the density of light weight aluminum alloy sheet less than 4, the items with higher quality needs can utilize DC shock wave spot welding, seam welding machine welding

4. Rubbing mix welding

Light weight aluminum alloy welding is easy to generate pores, this time around friction mix welding will certainly can be found in handy. Rubbing stir welding is a sort of strong state link modern technology which can be used for all kinds of alloy plate welding. Compared to the standard fusion welding approach, it has no splash, no smoke and dust, no need to include welding cable and also safety gas, and also the joint has no pores and also fractures. Compared with regular rubbing welding, it is not limited by shaft components and also can bond straight welds. This welding approach has a series of other benefits, such as good mechanical buildings of the joint, energy saving, no contamination, and low pre-welding preparation demands. Light weight aluminum and light weight aluminum alloys with reduced melting factor are better for rubbing stir welding.

5. High power thickness welding.

Laser welding, electron light beam welding as well as plasma arc welding are sorts of high power thickness welding.

Laser welding.

Laser is widely utilized in many fields especially in light weight aluminum alloy welding. Compared to the typical welding innovation, laser welding has an extremely significant advantages, such as tiny contortion, small thermal impact variety, quick welding speed, light joint damages, reduced heat input, yet in order to acquire a great developing impact and also top quality of the weld, the proper welding parameters are particularly vital. The results of pulse laser welding of 5052 light weight aluminum alloy sheet show that under the welding criteria of defocus of -2.5 mm, welding rate of 270 mm/min and also pulse regularity of 18Hz, the weld with excellent surface developing and particular depth of infiltration can be acquired.

Electron light beam welding.

Electron beam of light welding (EBW) refers to welding by utilizing the heat energy generated by pestering the joint of the work surface with focused high-power thickness electron beam in a high vacuum cleaner environment. It is a welding approach that integrates steel heating and also combination to develop a weld. Vacuum cleaner can avoid the influence of air on the weld development. It is tough to gauge the temperature level in the process of electron light beam welding. Although the home heating power thickness is high, the weld depth proportion and the adaptability is large, it is limited by the welding devices, and also the shapes and size of the work surface. Prior to welding, the workpiece is required to be demagnetized to stop the magnetic migration from affecting the welding result.

Plasma arc welding.

Plasma arc welding is a new and also reliable welding approach, which has the features of high productivity, high welding effectiveness, inexpensive, great weld high quality, fast welding rate, small anxiety and deformation, and so on. Rectangle-shaped wave AC welding power is frequently utilized in the ion arc welding of aluminum as well as light weight aluminum alloys, and argon gas is utilized as the securing gas. Plasma arc welding of pure aluminum and also antirust light weight aluminum has excellent welding impact.

6. CMT welding.

CMT welding, as an additive production approach, has been extensively utilized in auto market, armed forces as well as nuclear power plant. CMT welding innovation has the benefits of little heat transfer, even more secure arc, little welding deformation, uniform weld, etc. Yet due to the fact that the warm input is low, the efficiency is low. CMT welding transcends to MIG welding to some extent, can acquire much better welding joint of light weight aluminum alloy than pulse welding, and also it appropriates for slim aluminum sheet welding.