The Basic Guide of Handheld Laser Welding Machine
What is a handheld laser welding machine?
The handheld laser welding machine is a new generation of laser welding equipment, which belongs to non-contact welding.
There is no need to pressurize in the operation process.
Its working principle is to directly irradiate the high-energy laser beam on the material surface, melt the material inside through the interaction between the laser and the material, and then cool and crystallize to form the weld.
The hand-held fiber laser welding machine fills the gap of hand-held welding in the laser equipment industry, subverts the working mode of the traditional laser welding machine, and replaces the previous fixed optical path with hand-held, which is flexible and convenient, with long welding distance, and also makes it possible for laser welding to operate outdoors.
Handheld welding is mainly aimed at laser welding of long-distance and large workpieces to overcome the limitations of the travel space of the worktable. During welding, the heat-affected area is small, which will not lead to work deformation, blackening and traces on the back. Moreover, the welding depth is large, the welding is firm and the melting is sufficient.
It can not only realize thermal conductivity welding, but also continuous deep penetration welding, spot welding, butt welding, overlap welding, seal welding, seam welding, etc.
This process subverts the working mode of the traditional laser welding machine and has the advantages of simple operation, beautiful weld, fast welding speed and no consumables.
It can weld thin stainless steel plate, iron plate, galvanized plate and other metal materials, and can perfectly replace the traditional argon arc welding for stainless steel plate, iron plate, aluminum plate etc.
Working principle of handheld laser welding machine
The working principle of handheld laser welding machine is to use high-energy laser pulse to locally heat the material in small areas. The energy radiated by the laser is guided to the internal diffusion of the material through heat transfer, and the material is melted to form a specific molten pool.
The special advantage of laser heat source is that it has extraordinary heating capacity and can concentrate a large amount of energy on a small action point.
Therefore, it has the characteristics of high energy density, heating concentration, fast welding speed and small welding deformation, and can realize the rapid connection of thin plates.
When the power density on the laser spot is large enough (> 106w/cm2), the metal is heated rapidly under the irradiation of the laser, its surface temperature rises to the boiling point in a very short time, and the metal gasifies.
The metal vapor leaves the surface of the metal molten pool at a certain speed to produce additional stress, which reacts on the molten metal and makes it sag downward, resulting in a small pit under the laser spot.
With the heating process, the laser can be directly injected into the pit bottom to form a slender “small hole”.
When the recoil pressure of metal vapor is balanced with the surface tension and gravity of liquid metal, the small hole will no longer go deep.
When the spot density is large, the small hole will run through the whole plate thickness to form a deep penetration weld.
The small hole advances in the welding direction with the light beam relative to the workpiece.
The metal melts in front of the small hole, flows around the small hole to the rear, and solidifies again to form a weld.
It is a new welding method, mainly for the welding of thin-walled materials and precision parts, and can realize spot welding, butt welding, overlap welding, seal welding, etc.
Why use a handheld laser welder?
The handheld laser welding machine is mainly used for laser welding of long-distance and large workpieces.
During welding, the heat-affected area is small, which will not cause workpiece deformation, blackening and weld beading.
In addition, it has large welding depth, firm welding and sufficient melting.
There is no depression between the raised part of molten material in the molten pool and the matrix structure.
Characteristics of hand-held laser welding: hand-held welding joint is selected, which greatly overcomes the limitation of workbench space.
The welding head can also be fixed and welded by moving the workpiece. The welding head can rotate in all directions, which is convenient and simple to operate.
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The handheld welding head is equipped with 5m imported optical fiber, which is flexible and convenient, and can realize outdoor welding.
Advantages of handheld laser welding machine
Hand-held laser welding technology has the advantages of simple operation, beautiful weld, fast welding speed and no consumables.
In addition, the welding of thin stainless steel plate, iron plate, galvanized plate and other metal materials can perfectly replace the traditional argon arc welding, electric welding and other processes.
Fundamentally speaking, the handheld design of handheld laser welding machine plays a very important role in the application of production practice!
For the workshop which is engaged in small-scale processing or non large-scale welding, the handheld laser welding system is the best choice
The key point is that the welding products of small workshops are diversified and the shape of products is flexible. Manual laser welding can fully meet this demand.
The hand-held laser welding machine uses the hand-held welding gun instead of the previously fixed light path, which overturns the previous working mode of the laser welding machine.
This operation mode is not only convenient for the welding of mold, advertising words, kitchenware and other products, but also for outdoor laser welding.
In addition, the hand-held laser welding system can also be widely used in the complicated and irregular welding process of cabinet, kitchen, stair elevator, shelf, oven, stainless steel door and window guardrail, distribution box, stainless steel home and other industries.
Stainless steel, aluminum, copper, gold and silver jewelry can be welded, and including a lot of hardware, triangle valve, stainless steel sink, water pipe fittings, stainless steel pipe tee elbow, floor drain, door handle, door lock, etc.
1. Wide welding range
The handheld welding joint is equipped with 5m-10m original optical fiber, which overcomes the limitations of workbench space and can be welded outdoors and remotely;
2. Convenient and flexible use
Handheld laser welding is equipped with mobile pulley, which is comfortable to hold, and the station can be adjusted at any time without fixed station. It is free and flexible and is suitable for various working environment scenes.
3. Multiple welding methods
It can realize welding at any angle: overlap welding, butt welding, vertical welding, flat fillet welding, internal fillet welding, external fillet welding, etc.
It can weld workpieces with various complex welds and irregular shapes of large workpieces.
It can realize welding at any angle.
In addition, it can also complete cutting, welding and cutting can be switched freely, just change the welding copper nozzle to the cutting copper nozzle, which is very convenient.
4. Good welding effect
Handheld laser welding is hot melt welding.
Compared with traditional welding, laser welding has higher energy density and can achieve a better welding effect. The welding area has little thermal impact, is not easy to deform and blacken, has trace problems on the back, has large welding depth, sufficient melting, firm and reliable, and the weld strength reaches or even exceeds the base metal itself, which can not be guaranteed by ordinary welding machines.
5. Welds need not be polished
After traditional welding, the welding points need to be polished to ensure smoothness and no roughness.
Handheld laser welding just reflects more advantages in processing effect: continuous welding, smooth without fish scale, beautiful without scar, and less subsequent grinding process.
6. No consumables for welding
In most people’s impression, the welding operation is “left hand goggles, right hand welding wire”.
However, with the handheld laser welding machine, the welding can be easily completed, which further reduces the material cost in production and processing.
7. With multiple security alerts
Only when the welding nozzle touches the metal, the touch switch is effective.
After the workpiece is removed, the light is automatically locked, and the touch switch has temperature sensing.
High safety to ensure the safety of operators during work.
8. Save labor cost
Compared with arc welding, the processing cost can be reduced by about 30%.
The operation is simple and easy to learn, and the operator’s technical threshold is not high. Ordinary workers can take up their posts after a short training, which can easily achieve high-quality welding effect.
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