What Is Laser welding？
Laser welding, also known as laser beam welding (“LBW”), is a technique in manufacturing whereby two or more pieces of material (usually metal) are joined together through the use of a laser beam.
It is a non-contact process that requires access to the weld zone from one side of the parts being welded.
The heat created by the laser melts the material on both sides of the joint, and as the molten material mixes and resolidifies, it fuses the parts.
The weld is formed as the intense laser light rapidly heats the material – typically calculated in milliseconds.
The laser beam is a coherent (single-phase) light of a single wavelength (monochromatic). The laser beam has low beam divergence and high energy content that will create heat when it strikes a surface
Like all forms of welding, the details matter when using LBW. You can use different lasers and various LBW processes, and there are times when laser welding is not the best choice.
Features of laser welding
1) Deep depth, fast speed and small deformation.
When using laser welding for workpiece connection, the connection gap of the welded workpiece is almost non-existent, and at the same time, the depth-to-width ratio of welding is large, the deformation after welding is small, the heat-affected zone is small, and the precision is high.
2）The welding device is simple and flexible, can be welded at room temperature or under special conditions, and does not have high requirements for the welding environment.
3) High power density
Laser welding has a considerable depth of melt and high power density, which can weld refractory materials, such as titanium alloys, etc.
4) High energy density and suitable for high speed welding
5) No wear and tear consumption of electrodes, tools, etc.
6) No pollution to the environment.
7) It is possible to achieve long-distance, hard-to-reach parts, multi-way simultaneous or time-sharing welding by optical fiber.
8) It is easy to change the laser output focal length and welding spot position.
9) It is easy to be mounted on a robot device.
Working principle of laser welding
Laser welding works by introducing heat into a joint with a powerful laser beam. The material is melted on each side of the joint and fuses the parts when it resolidifies.
At a minimum, you need a laser and the optics to focus it where you want, a way to move the beam precisely over the joint, and a worktable to fit up and hold the parts.
The actual process of refining, or “organizing,” light waves with optics into a narrow, highly energetic beam is quite complex. So, the mechanics of how a laser works are beyond the scope of this article.
There are many laser types with different levels of power. But the right beam can quickly heat metal on both sides of a joint to high temperatures.
The laser applies the needed energy fast. Depending on your laser and workpieces, you may need to shoot the beam at the metal in pulses that last for only a few milliseconds. Or, a continuous beam may be best. It depends on how much power is needed, and you do have a fair amount of control over how the LBW setup applies heat to the parts.
Of course, the molten metal will take a few seconds to cool and resolidify. But overall, it is a swift weld process, making it a highly productive way to join parts.
For this reason, LBW is popular where high welding rates are needed, like production lines.
Advantages and Disadvantages of Laser Welding Techniques
Laser welding technology has multiple benefits over conventional types of welding technologies. Here are a few of the advantages that you get by using laser welding machines.
- The integration of laser welding is easier with automation and Computer Aided Systems. This not only gives you greater control over the entire process but also the operation becomes more accurate and efficient.
- Tools are not affected during the welding process.
- The focus of the laser beam is very accurate. Thus, the final weld is of high quality and durable for a long time to come.
- The speed of the welding process is much higher than that of conventional welding techniques. This makes the laser welding technology suitable for batch productions.
- Laser welding is applicable to products that require a high level of accuracy, like in the manufacturing of medical industry products.
- The input energy is lower than that used in other types of welding techniques.
- No secondary finishing of the product is necessary after welding. Thus, saving the welding time and manpower.
- Contactless method. This means that there are no contacting parts and thus the quality of the final product and the life of the machines will be better.
Things to look out for during Laser Welding
Although there are no disadvantages of laser welding per se. However, there are a few things that need to be taken care of while applying the method on an industrial scale.
It is understandable that laser welding requires a certain amount of skill to accomplish the task. In case if the task is accomplished by someone who is not aware of the laser welding technique then the final product will suffer.
A few of these incidents where lack of technique or experience comes into play are as follows:
- A clear understanding of the job and the type of laser to use is a must for the technician working on the laser welding system.
- Removing air pockets is a must for the technicians. If the air pockets will stay during the welding process then the weld will not be durable and fail after a little time. This problem mostly arises in the pulse laser welding method.
- Application of the laser heat evenly along the surface of the metal during the laser conduction welding method is a must. If the laser heat will not distribute evenly along the surface, it might result in uneven welds, which will create reliability issues in the future.
- You have to be extra-cautious when welding on optical surfaces as they can get damaged easily.
Furthermore, the initial investment involved in laser welding machines is relatively higher than other welding methods. In addition, the maintenance cost of the machine is also higher if it develops issues during operation.
What Is Laser Welding Machine?
Laser welding machine is an eco-friendly power welding tool with handheld laser welding gun, CNC controller, or single-arm robot to join pieces of metals or thermoplastics. Laser beam provides a concentrated heat source, which is used for spot welding, butt joint, lap joint, lap edge, lap, T butt, seam welding, narrow welds, deep welds, and kissing weld with high welding rates. The process is frequently used in high volume applications with automation, which is based on keyhole or penetration mode welding.
Laser welding machines are engine driven welders used for a variety of applications from welding very small parts together commonly used by manufacturing businesses in the engineering, medical and electronics industries, through to welding thicker materials in the automotive and aerospace industries. Laser welding is a versatile, low cost way of achieving high quality spot welds for different materials and thicknesses.
A laser welding machine is also known as laser beam welding machine, laser welder, laser beam welder, laser welder machine, laser beam welding equipment, laser beam welding gun, laser beam welding tool, seam welding machine, laser bonding machine, laser brazing machine, laser joining machine, laser soldering machine.
Categorization of Laser Welders
There are multiple modes of laser welding that we can categorize the machines into. Therefore, we can categorize laser welding technology in various ways. Let’s start defining the laser welding machines by the different categories:
Categorization is based on the type of laser
The pulsed laser mechanism is ideal for metals that are light in nature and have low thickness. Thus, the pulsed laser makes intermittent exposure on the metallic body. Keeping it safe from burning or melting.
Furthermore, this type of laser welding is ideal for welding sheets of metal, razors, jewelry, and even medical prosthetics like screws.
The continuous laser is ideal for welding on parts that have a high thickness and are strong. Moreover, this welding technology is good for refractory surface metals too.
This type of welding is costlier than the pulsed type welding but in the long run, saves a lot of money and labor for you.
Categorization based on the source of laser
Currently, there are three main types of sources of laser for laser welding machines that use one of these laser sources i.e. Fiber laser, CO2 laser, and Nd: YAG laser. Each of these laser sources has their own benefits and are suitable for the different types of welding materials.
Fiber Laser Welding Machine
The fiber laser welding machine is ideal for working on metallic parts. Furthermore, it offers great reliability and efficiency. According to estimates, the accuracy of the laser welding machine using fiber laser is close to 25%.
The CO2 laser welders can provide a great continuous welding beam that creates efficient and durable welds. It can easily penetrate metals and non-metallic bodies.
The Nd: YAG lasers are less energy efficient as compare to the fiber laser welding machines. However, there are certain applications like greater laser control that you cannot achieve with other types of laser sources.
Summing up, you will get laser welders of all types, technologies, and sources. You will have to decide which type of laser welder will suit your business the best.
Before discussing the selection of the best laser welders, let’s have a look at the main applications of laser welding machines in the industry.
Working principle of fiber laser welding machine
When the pump light passes through the rare earth ion in the optical fiber, it will be absorbed by the rare earth ion. At this time, the rare earth atom electrons absorbing photon energy will be excited to a higher lasing energy level, so as to realize the inversion of the ion number. The reversed ion number will be transferred from the high-energy level to the ground state in the form of radiation, and release energy to complete the stimulated radiation. The laser produced by the optical fiber laser welding machine is output through the optical fiber, and is matched with the supporting workbench to complete the corresponding welding.
Fiber laser welding machine is divided into pulse fiber laser welding machine and continuous. Among them, the pulse fiber laser welding machine can adjust the laser pulse single point energy by setting the laser peak power, frequency and pulse width; the continuous fiber laser welding machine can adjust the output laser power by setting the average laser power.
Handheld Fiber Laser Welding Machine Features
1. High laser energy density, small thermal effect area, not easy deformation, less or no subsequent processing.
2. Top brand gold cavity, high temperature resistance, corrosion resistance, the service life is 8 to10 years, the xenon lamp service life is more than 800 million times.
3. Easy spot welding, stack welding, splicing and continuous welding.
4. Variety of detection and protection measures using, greatly avoid the faults caused by a variety of external factors or human misuse, to protect the equipment with long-term stable operation.
5. Non-contact processing, stress free, noiseless, no pollution to the environment, which belongs to the green processing.
6. Good welding quality, smooth and beautiful appearance.
7. The communication function monitors all data of the laser.
8. The small fiber laser welding machine adopts a specific fiber to achieve the welding of tiny solder bumps.
9. High quality fiber laser beam, high conversion efficiency and therefore high welding speed, high aspect ratio, high strength.
10. Excellent spectral system minimizes energy loss to ensure that the laser energy of each fiber is almost the same.
11. The portable laser welder adopts optical fiber transmission, can realize remote welding, conveniently to equip with automatic welding workbench, manipulator, assembly line and other equipment together to work. More uniform light spot and more beautiful solder joints after the light transmission.
12. A variety of input and output signals are very easy to achieve the machine’s automated production and assembly line production.
13. Solder joints non-pollution, weld strength and toughness at least equivalent to or stronger than the base metal.
14. The manual fiber laser welder supports time spectroscopy and energy splitting or a combination of these two spectroscopic modes (customizable). Multi-channel fiber output, up to 4 fiber at the same time, significant cost savings, improve welding efficiency and reduce equipment space.
15. Touch screen input, friendly human-computer interaction makes setup and operation easier. The operating system is easy to learn and easy to operate.
What is Handheld Laser Welding Gun?
Handheld laser welding gun is a portable welder combined with laser generator, welding system, cooling system, and automatic wire feeder to achieve stitch welding, nail welding, butt welding, lap welding, lap welding, tailoring edge welding, crimp welding, T-welding, and more types of metal joints. The hand-held laser welding gun is flexible and convenient, which can realize long-distance welding and outdoor welding. The operating mode of the hand-held welding gun enables the part to be welded in any position and at any angle. It is suitable for spot welding of various complex welded joints.
The hand-held laser welding gun is composed of a gun body, a cooling chamber and a protective gas chamber. It is not only simple and compact in structure, easy to operate and carry anywhere, but also can be easily connected to the cooling medium source and the protective gas source, so that the welding gun can be effectively cooled, and the welding area can also be effectively used. A protective gas atmosphere is formed, which makes the weld quality reliable.
How to choose the laser beam source?
There are three types of sources: fiber laser, CO2 laser and Nd:YAG laser. The choice of source depends on the type of laser you have chosen (pulsed or continuous).
- The fiber laser:
- This technology is based on sharp and thin beams that allow continuous and penetrative work to be carried out.
- Like the CO2 laser, the fiber laser can penetrate thick sheets with great speed and efficiency.
- This laser offers an average efficiency of 25%.
- The CO2 laser:
- This technology uses a gas mixture of carbon dioxide, helium and nitrogen that is electrically-excited and optimized for continuous operation.
- Like the fiber laser, the CO2 laser can penetrate thick sheets with great speed and efficiency.
- It is more effective at penetrating thick steel parts than the fiber laser so it is more widely used.
- It is more flexible and can penetrate thicker and lighter materials than the fiber laser.
- This laser offers an average efficiency of 7% for 8,000 W.
- The Nd:YAG laser:
- It allows effective control of the power, duration and shape of the laser pulses.
- It is optimized for pulsed mode.
- But it emits pulses of very different wavelengths that do not all reach their target and then dissipate in the form of heat.
- This type of laser is less energy efficient (3 to 4% efficiency) than CO2 lasers (7 to 10%) and fiber lasers (25 to 30%).
Structure of laser welding machine
aser welding machine is generally composed of five parts,
1： Laser welding host:
The laser welding host mainly produces the laser beam for welding, which is composed of power supply, laser generator, optical path part, control system and other main parts,
2： Cooling system:
Cooling system provides cooling function for laser generator, generally equipped with 1-5 HP water circulating chiller (mainly for welding machine of square and round laser),
3： Laser welding automatic table or motion system:
The system is used to realize the laser welding, the laser beam moves according to the welding track according to the specific requirements, and realize the automatic welding function of the laser. Generally, there are three kinds of motion control forms: workpiece movement, laser head fixation, laser head movement, workpiece fixation, or laser head and workpiece movement. The whole system, through the way of CNC programming, compiles the motion control program to control the workbench movement according to the requirements, And after the simplified programming system, it has the advantages of simple operation, rapid holding without professional technology or education background. In the worktable system of square and circular laser, such as: manipulator motion system, two-dimensional, three-dimensional worktable, four-axis linkage worktable, gantry welding worktable, cantilever worktable, etc., precise welding motion control can be realized
Generally, in the process of laser welding, the laser welding fixture is mainly used to fix the welded workpiece, and make it can be repeatedly loaded and unloaded, repeatedly positioned, so as to facilitate the automatic laser welding. Therefore, the fixture is one of the necessary equipment in the laser welding production, especially in the batch production, whether the fixture is designed in place will directly affect the production efficiency and yield, Fangyuan laser has a large number of professional supporting designers, specially designed laser welding clamping solutions for customers, and provided 3D demonstration, so that customers can clearly understand the whole welding scheme
5、 Observation system:
Generally, the laser welding machine needs to be equipped with an observation system, which can carry out real-time microscopic observation on the workpiece. It is used to facilitate accurate positioning and check the welding effect in the welding process when preparing the welding program. Generally, it is equipped with a CCD display system or a microscope
What parameters should be checked?
Before using your laser welding machine, you will need to verify several parameters. Here are some common precautions to take to ensure that your welding operations are a success.
- Adjust energy
- It is important to adjust the energy appropriately in order to adapt the power to the process.
- This will prevent energy waste.
- Ensure that you have the correct beam diameter
- The diameter affects the welding performance.
- We recommend that you choose a laser beam with a diameter between 0.2 and 2 mm.
- Check the pulse frequencies
- Pulse frequencies that are too high result in pulse energies that are too low making the welding less efficient or even inefficient.
- Monitor the waveform of laser pulses
- We recommend that you change the waveform according to the metal you intend to weld.
- If you use an inadequate waveform, 60% to 98% of the laser energy will be lost and your welding operation will fail.
Factors affecting the quality of laser welding
Laser welding is a process in which a high-energy beam of laser light irradiates a workpiece, causing a dramatic increase in working temperature, and the workpiece melts and rejoins to form a permanent joint.
Laser welding has better shear strength and tear strength.
There are many factors that affect the quality of laser welding.
Some of them are extremely volatile and have considerable instability. How to properly set and control these parameters to keep them within the right range for the high-speed continuous laser welding process to ensure the weld quality.
The reliability and stability of weld forming is an important issue related to the practical and industrialization of laser welding technology.
The main factors affecting the quality of laser welding are divided into three aspects: welding equipment, workpiece condition and process parameters.
The most important quality requirements for lasers are beam pattern and output power and its stability.
The lower the beam pattern order, the better the beam focusing performance, the smaller the spot, the higher the power density at the same laser power, and the greater the weld depth and width.
Generally required base mode (TEM00) or low-order mode, otherwise it is difficult to meet the requirements of high-quality laser welding.
Currently, China’s lasers are still difficult to use for laser welding in terms of beam quality and power output stability.
From the foreign situation, the laser beam quality and output power stability has been quite high, will not become a problem for laser welding.
The optical system is the biggest factor affecting the quality of welding is the focus mirror, the focal length used is generally between 127mm (5in) to 200mm (7.9in), the focal length is small to reduce the focus beam waist spot diameter is beneficial, but too small is easy to be contaminated and spatter damage in the welding process.
The shorter the wavelength, the higher the absorption.
Generally, materials with good conductivity have high reflectivity.
For YAG laser, the reflectivity is 96% for silver, 92% for aluminum, 90% for copper and 60% for iron.
The higher the temperature, the higher the absorbance, in a linear relationship.
General surface coating phosphate, carbon black, graphite, etc. can improve the absorption rate.
2）Condition of workpiece
Laser welding requires that the edges of the workpiece being processed and assembled with high precision, that the spot be strictly aligned with the weld seam, and that the original assembly precision and spot alignment of the workpiece not change during the welding process due to welding heat distortion.
This is because the laser spot is small, the weld seam is narrow, and generally no filler metal is added.
If the assembly gap is too large, the beam can pass through the gap and cannot melt the base material, or cause obvious nibbling, depression, such as spot to seam deviation is slightly larger may cause unfused or not welded through.
Therefore, the general plate butt assembly gap and spot seam deviation should not be greater than 0.1mm, the wrong side should not be greater than 0.2mm.
In actual production, sometimes the laser welding technology cannot be used because these requirements cannot be met.
To obtain good welding results, the allowable butt gap and lap gap should be controlled within 10% of the thin plate thickness.
Successful laser welding requires close contact between the substrates being welded.
This requires careful tightening of the parts to achieve the best results.
3) Welding parameters
(1) The impact on the laser welding mode and weld forming stability pieces, the most important of the welding parameters is the power density of the laser spot, which affects the welding mode and weld forming stability as follows.
With the laser spot power density from small to large in order for stable thermal conduction welding, mode instability welding and stable deep fusion welding.
Laser spot power density, in the case of a certain beam pattern and focus mirror focal length, is mainly determined by the laser power and beam focus position.
The laser power density is proportional to the laser power.
while an optimum value exists for the effect of the focal point position.
When the focal point of the beam is at a certain position under the surface of the workpiece (within the range of 1 to 2 mm, depending on the plate thickness and parameters), the most ideal weld seam can be obtained.
Deviation from this optimal focal position, the workpiece surface spot that becomes larger, causing the power density to become smaller, to a certain range, will cause changes in the form of the welding process.
The impact of welding speed on the form of the welding process and stable parts is not as significant as the laser power and focal position, only when the welding speed is too large, due to the heat input is too small to maintain a stable deep fusion welding process.
In practice, welding should be based on the requirements of the welded parts on the depth of melt to choose stable deep fusion welding or stable heat conduction welding, and to absolutely avoid mode instability welding.
(2) In the deep fusion welding range, the influence of welding parameters on the depth of melt:
In the stable deep fusion welding range, the higher the laser power, the greater the melt depth, about 0.7 times the relationship.
And the higher the welding speed, the shallower the depth of melt.
Under certain laser power and welding speed conditions, the focal point is in the best position when the depth of melt is maximum. If it deviates from this position, the depth of melt decreases and even becomes a mode of unstable welding or stable thermal conduction welding.
(3) The effect of protective gas
The main role of the shielding gas is:
Protection of the workpiece from oxidation during the welding process.
protection of the focusing lens from metal vapor contamination and sputtering of liquid molten droplets.
Dispersing the plasma generated by high power laser welding.
Cooling the workpiece and reducing the heat-affected zone.
The shielding gas is usually argon or helium, or nitrogen if the apparent quality is not high.
Their tendency to produce plasma is significantly different: helium, due to its high ionization body and fast thermal conductivity, has less tendency to produce plasma than argon under the same conditions, thus allowing for a greater depth of melt.
In a certain range, as the flow of protective gas increases, the tendency to suppress the plasma increases, thus increasing the melt depth, but increases to a certain range that tends to smooth out.
(4) Analysis of the monitorability of each parameter.
Among the four welding parameters, welding speed and shielding gas flow rate belong to the parameters that can be easily monitored and kept stable, while laser power and focal position are parameters that may fluctuate during the welding process and are difficult to monitor.
Although the laser power output from the laser is highly stable and easy to monitor, the laser power reaching the workpiece will change due to losses in the light guide and focusing system, and this loss is related to the quality of the optical workpiece, time of use and surface contamination, so it is not easy to monitor and becomes an uncertainty in welding quality.
The focal position of the beam is one of the most difficult factors to monitor and control among the welding parameters that have a great impact on the quality of the weld.
Currently in production, manual adjustment and repeated process tests are required to determine the appropriate focal position in order to obtain the desired depth of melt.
However, due to deformation of the workpiece, thermal lens effect or multi-dimensional spatial curves during the welding process, the focal position can change and may be out of the allowable range.
For the above two cases,
- On the one hand, the use of high-quality, highly stable optical components, with frequent maintenance to prevent pollution and keep them clean.
- On the other hand, it is required to develop real-time monitoring and control methods for the laser welding process in order to optimize parameters, monitor changes in the laser power and focal point position reaching the workpiece, and achieve closed-loop control to improve the reliability and stability of the laser welding quality.
Laser welding of steel materials
1.Laser welding of carbon steel and common alloy steel
In general, laser welding of carbon steel works well and its welding quality depends on the impurity content. As with other welding processes, sulfur and phosphorus are sensitive factors for weld cracking.
In order to obtain satisfactory weld quality, preheating is required for carbon contents above 0.25%.
When different carbon content of steel welded to each other, the torch can be slightly biased towards the low carbon material side to ensure the quality of the joint. Low-carbon boiling steel is not suitable for laser welding due to the high content of sulfur and phosphorus.
Low-carbon quelling steel is good for welding due to its low impurity content.
Medium and high carbon steels and common alloy steels can be laser welded well, but require preheating and post-weld treatment to relieve stress and avoid crack formation.
2.Laser welding of stainless steel
In general, laser welding of stainless steel is easier than conventional welding to obtain quality joints.
Due to the high welding speed heat affected zone is very small and sensitization does not become an important issue.
Compared to carbon steel, the low thermal conductivity of stainless steel makes it easier to obtain deep fusion narrow weld seams.
3.Laser welding between different metals
The extremely high cooling rate and the small heat-affected zone of laser welding create favorable conditions for the compatibility of materials with different structures after welding and melting of many different metals.
The following metals have been shown to be successfully laser deep-fusion welded:
- Stainless Steel ~ Mild Steel
- 416 stainless steel ~ 310 stainless steel
- 347 stainless steel ~ HASTALLY nickel alloy
- Nickel electrodes ~ cold forged steel
- Bimetallic strips with different nickel content
How Much Does A Handheld Laser Welding Machine Cost?
The average cost of a handheld laser welding machine is around $7,980 depending on the fiber laser powers based on the data from Google, Amazon, and STYLECNC. A cheap portable laser welder with 1000W fiber laser source is priced from $5,500 for beginners with hobbyists in home use. An affordable 1500W handheld fiber laser welding machine cost start at $7,800 for small business with low cost. The top rated portable fiber laser welder machine with 2000W handheld laser welding gun will cost $10,500 for commercial use in industrial manufacturing. The best budget 3-in-1 laser welding, cleaning, cutting machine prices range from $5,400 up to $8,000.
Application of laser welding Machine
Laser welding finds large applications in various types of industries. These industries range from the manufacturing industry to the medical industry to the jewelry manufacturing industry.
Here are a few of the industries that have major applications of laser welding technology.
Robotic welding of parts could never have become a reality if it was not due to the laser welding techniques. The laser beam is aligned on the seam of the parts to be welded. These units are then passed through the laser welding by a conveyor belt.
Thus, the speed at which the process happens enables the rapid production of welded products. This technology has applications in an uncountable number of industries. Almost every manufacturing industry that makes use of metallic parts has a use for this kind of welding. Therefore, the application of laser welding is found at large in all types of metallic and non-metallic manufacturing industries that make use of welding of parts.
Another important application of laser welding is found in the jewelry industry. When you have to make intricate and delicate parts of jewelry from two different materials that are to be weld together, then the best option for welding them together is the laser welding technology.
According to twi-global, almost 15% of all the manufacturing processes in the industry involve laser application in one way or another. CO2-type welding has a large application in the automotive industry. The major application of welding is found in the manufacturing of gears, transmission parts, power trains.
Most of these products also require circular and annular welds. Thus, the circular welds are also well managed by laser welding. Furthermore, Nd: YAG has a high application in the welding of body parts and the structure of automobiles.
Laser welding has found large successes in the automotive industry primarily due to the speed of operation, accuracy, efficiency, and lower cost in the long run.
If you start listing down the individual industries that make use of laser welding then you will run out of time and writing space and time but you will not run out of the industries that make use of laser welding. Similarly, the medical industry has a large application of laser welding methods.
The most number of applications of the laser welding technique in the medical industry is the welding of dissimilar metal welding. Medical aids are usually made up of different types of electronic parts that are further fitted with multiple semi-conductors.
The main challenge in the scenario arises when the different metals and materials, possessing different chemical and physical properties are to be weld together. But the fiber laser welders do the job successfully.
A few of the hard metals and materials like stainless steel, 440C or 430, and Titanium alloys are also widely in use in the medical industry. These materials are to be weld together with a foolproof system that ensures the health of the patient.
Other devices like pacemakers, AEDs, drug pumps also make use of laser welding technologies.
Laser Welding vs MMA Welding vs MIG Wedling vs TIG Welding
Shielded metal arc welding (SMAW), also known as manual metal arc welding (MMAW or MMA), shielded metal arc welding (SMAW): large spatter, low utilization rate of filler metal, frequent removal of welding slag, replacement of welding rods, extremely slow speed, low production efficiency, and a strong dependence on the welder’s operating skills and experience.
Metal inert gas welding, also known as MIG welding: large welding wire consumption, large heat input, welding thin plates are easily deformed and burned through, welding of medium and thick plates needs to be grooved, and the welding seam is serious and requires subsequent polishing.
Manual tungsten inert gas welding, also known as manual TIG welding: The welding seam has shallow penetration and large melting width. It can only weld thin plates and has a large amount of deformation. Large currents will also cause the tungsten electrode to melt and evaporate. Manual wire filling is difficult and inefficient.
Hand-held laser welding: simple operation, deep penetration, fast speed, smooth and beautiful welding seam, small deformation, reduce the follow-up grinding process, and can weld beautiful products without a master.
Traditional manual arc welding requires experienced welders and a lot of training and research. The control device of GW air-cooled handheld laser welding machine is intuitive and concise. The machine is preset with commonly used welding parameters, and users can customize and save what they need Processing parameters, ordinary personnel can easily get started after a few hours of simple training, and they can work without a certificate.
The welding speed of traditional manual arc welding usually does not exceed 1cm/s, while the welding speed of hand-held laser welding can reach 2-10cm/s, and its efficiency is 2-10 times that of traditional manual arc welding, and at least 2 can be saved a year Labor cost. In addition, manual arc welding usually requires polishing after welding, and there is almost no need for polishing and cleaning after laser welding, which can save part of the labor cost.
Handheld laser welder can weld common steels (such as carbon steel, stainless steel, galvanized steel), aluminum alloys, and brass. The weld seam is beautiful, no deformation, no deformation of the weldment, no need for subsequent processing. If the laser welding machine is used to weld steel, the penetration depth can reach 4mm, and if it is welding aluminum alloy or brass, the penetration depth can reach 3mm.