Handheld Laser Welding Machine: The Basic Guide

According to preliminary understanding, most stainless steel products are produced by argon arc welding and other common welding methods

Although these methods can meet 80% of the production needs, they will leave defects in many welding products.

For example: undercut, incomplete penetration, dense porosity and cracks

It not only reduces the firmness of the joint, but also becomes the corrosion source of crevice corrosion.

In the welding process, not only the welder’s technology has a certain level, but also the requirements for welding skills and the cost of flux are too large, which will increase the cost of production.

Moreover, the working steps of processing after welding are very slow.

Because of these defects, the handheld fiber laser welding machine was born.

Hand held laser welding technology mainly uses laser beam as the energy source to impact welding joint to achieve welding purpose

It is a new welding method with good welding performance and small deformation, which is widely used in processing and welding of various metals.

Handheld laser welding machine has the advantages of simple operation, beautiful weld, fast welding speed and no consumables.

Handheld laser welding machine

Welding of thin stainless steel sheet, iron sheet, galvanized sheet and other metal materials can perfectly replace the traditional argon arc welding, electric welding and other processes.

Hand held laser welding machine can be widely used in cabinet, kitchen, stair, elevator, shelf, oven, stainless steel door and window guardrail, distribution box, stainless steel home and other industries with complex irregular welding process.

Hand held laser welding speed is fast, 2-10 times faster than traditional welding, a machine can save at least 2 welders a year.

The welding seam after welding is smooth and beautiful, reducing the subsequent grinding process, saving time and cost.

The laser welding workpiece has no deformation, no welding scar and firm welding.

Laser welding consumables less, and with long service life.

Weldable graphics include: point, line, circle, square or any plane graphics drawn by AutoCAD software.

Main features of hand held laser welding machine

  • It is easy to operate and can be used by ordinary employees without high training cost.
  • It has the advantages of high efficiency, large welding size, fast welding speed, delicate and beautiful weld, and reduces the subsequent grinding process.
  • It can be widely used for welding stainless steel plate, iron plate, galvanized plate, aluminum plate and other metal materials.
  • The welding spot is small, the heat affected area is small, the welding workbench is not needed, and the floor area is small.
  • The handheld laser welding equipment can complete the welding operation as long as it is equipped with handheld laser welding joint, and the replacement cost of accessories is low.

Advantages of hand held laser welding machine

Advantages of handheld laser welding technology:

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.

Traditional welding vs handheld laser welding

Compared with the traditional welding method, what are the advantages of the handheld laser welding machine?

  • Simple operation: it can be welded at first hand without high training cost.
  • Fast and efficient, wide processing range: laser welding machine energy concentration, high efficiency and high-speed welding, smooth and beautiful weld, reduce the subsequent grinding process.
  • Wide range of weldable materials: stainless steel plate, iron plate, galvanized plate, aluminum plate and other metal materials can be welded.
  • Breakthrough the limitations of workpiece shape and processing environment: small solder joint, small heat affected area: no need to set up a welding workbench, small space occupation, flexible processing, fast welding speed, movable for long-distance operation, not limited by environmental space.
  • Low maintenance cost: as long as the handheld laser welding equipment is equipped with handheld laser welding joint, the welding operation can be completed, and the replacement cost of accessories is low.
  • High-cost performance: manual hand-held laser welding machine can not only carry out hand-held laser welding operation, but also engage in mold high-precision welding repair operation through the later erection platform. It is the preferred high-cost performance welding production equipment for more small-scale manufacturers.

Application of hand held laser welding system

As important support of green remanufacturing technology, laser processing technology has obvious competitive advantages compared with traditional processing methods

Because of its high speed, high precision, low energy consumption and many other advantages, it is widely used in microelectronics and electrical appliances, automobile, aerospace, machinery manufacturing, printing and packaging and other important areas of the national economy. It is an efficient manufacturing equipment tool for the country to achieve the strategic goal of intelligent manufacturing.

Laser welding technology is one of the important applications of laser processing. Among them, the important applications of hand-held laser welding are concentrated in the complex and irregular welding processes without fixture, such as sheet metal, chassis, water tank, distribution box, cabinet kitchen, stainless steel door and window guardrail, etc.

Although the development time is relatively short, it has replaced the traditional argon arc welding and electric welding in the welding of thin stainless steel plate, iron plate, aluminum plate and other metal materials in the above application scenarios.

At the same time, in recent years, due to the explosive growth of the development of new energy vehicles, a large number of power batteries have been expanded, and the laser welding industry has achieved further growth.

Hand held laser welding is gradually welcomed and recognized by the market, and has become a new bright spot in the laser market.

Industry insiders predict that in the future, after the laser handheld welding equipment has formed a standard, it will be widely used in rail transit, aerospace, automobile manufacturing, medical industry and other pillar industries.

Hand held laser welding

Challenges of hand held laser welding system

Although handheld laser welding system is more and more popular in the market, there are still some challenges.

Most of the hand-held laser welding machines provided by equipment manufacturers use continuous fiber lasers with power levels ranging from 200W, 300W, 500W to 1500W.

But for the sake of safety, the welder must undergo strict training, and the laser can not hit people or surrounding objects, otherwise, it will cause serious burns or even fire.

In addition, although the welding process is facing the workpiece, it will still produce high brightness reflection, so the operator must be equipped with special protective light goggles.

If the above problems are solved, the handheld laser welding system will get more recognition, and the market demand may develop rapidly.

What problems are solved by handheld laser welding system?

Application in the kitchenware industry

Hand-held kitchenware laser welder can save about 80% ~ 90% of electric energy. Compared with arc welding, the processing cost can be reduced by about 30%. It can weld dissimilar steel and dissimilar metal, and simply complete mechanization and automation.

Hand held kitchenware laser welder

2. Application in sheet metal processing field

In the field of sheet metal processing, compared with traditional argon arc welding, laser welding has obvious advantages: high efficiency, small thermal deformation, beautiful appearance, high strength, no need to polish after welding, seamless butt welding, bending, stamping and cutting.

laser welding laser welding

3. Application in stainless steel bathroom processing field

In the splicing welding process of stainless steel sanitary ware, handheld laser welding makes the seamless splicing of sanitary faucet welding, sink outlet splicing and so on, with bright welding seam. For the welding of right angle fillet, 360 ° welding can be achieved, which is easy to operate and more convenient.

welding process of stainless steel sanitary ware

Hand held laser welding vs traditional welding

With the development of economy and the improvement of welding technology, there are many welding methods for people to choose from.

Different from traditional welding equipment, more and more consumers choose laser welding machine in modern manufacturing industry.

So is laser welding really so good?

In order to help you better understand the characteristics of this product, I’d like to introduce the difference between laser welding and traditional welding.

Can laser welding replace traditional welding?

Let’s take a look at the welding methods separately.

welding methods

Low-temperature welding in traditional welding is an integrated welding method, in which the solder is heated by flame gun and spread in the gap of the metal to be welded.

Usually, the welded restoration should be embedded and preheated

This method is cumbersome and has shortcomings including easy to deform, solder joint fracture, corrosion etc.

At present, it is rarely used.

Hand held laser welding vs traditional welding

Hand held fiber laser welding machine working mode – hand welding, flexible and convenient, with longer welding distance.

Replace the fixed light path with a hand-held welding gun.

The hand-held fiber laser welding machine is mainly used for laser welding of long-distance and large workpieces. When welding, the heat affected area is small, which will not lead to work deformation, blackening and trace on the back.

Moreover, the welding depth is large, the welding is firm and the melting is sufficient.

There is no depression on the convex part of the dissolved material and the matrix structure of the solution pool!

What is the difference between hand welding and traditional welding?

The first characteristic of laser welding is that the deformation of the workpiece is very small and there is almost no joint gap.

The ratio of depth to width is high. When high power devices are welded, the ratio of depth to width is 5:1, and the highest is 10:1.

Weld strength is high, welding speed is fast, weld seam is narrow, and the surface state is usually good, eliminating the cleaning work after welding, the appearance is more beautiful than traditional welding.

Laser welding can weld inaccessible parts. It has great flexibility to carry out non-contact remote welding, but laser welding can only be used for thin plate, the penetration of the laser welding process is not enough, and the chassis and frame can not be welded.

This point can be achieved by spot welding, but the welding joint of spot welding needs to stack two thin plates together, and there will be 15mm lamination, which not only affects the appearance but also increases the weight of the car.

Laser welding is certainly the most advanced body welding technology at present, but it is impossible for the whole vehicle to adopt laser welding.

  • Laser welding is non-contact welding, the operation process does not need pressure, the welding speed is fast, the efficiency is high, the depth is large, the residual stress and deformation is small, can be welded at room temperature or under special conditions (such as closed space), the welding equipment is simple, does not produce X-ray.
  • It can be used to weld refractory materials such as high melting point metals, and even non-metallic materials such as ceramics and plexiglass. It has good effect and great flexibility in welding special-shaped materials. It can be used for non-contact long-distance welding of inaccessible parts.
  • Small spot can be obtained by focusing the laser beam. Because it is not affected by the magnetic field and can be accurately positioned, it can be used for micro-welding, which is suitable for assembly welding of micro and small workpieces in mass automatic production.
  • The laser beam is easy to realize beam splitting according to time and space, and can transfer laser beam to multiple workstations by switching device. Therefore, multi-beam simultaneous processing and multi-workstation processing can be carried out, which provides conditions for more precise welding.
  • Because laser welding is non-contact processing, there are no tool loss and tool replacement problems. At the same time, it does not need to use electrodes, so there is no worry about electrode pollution or damage. It is easy to carry out high-speed welding with automation, and it can also be controlled by digital or computer.
  • The technical requirement is that as long as you have some basic computer knowledge, ordinary employees can do it. Unlike the traditional welding machine, you need a master with high operation experience and good technology. So as to save a relative part of costsfor the enterprise once again.

hand welding

Can laser welding replace traditional welding?

The answer is yes.

Laser welding has more advantages than the following three characteristics.

  • Fast welding speed
  • Meet the requirements of mass production
  • Meet the requirements of continuous production

It is 2-10 times faster than traditional welding, and a machine can save at least 2 welders a year.

No technical requirements, general workers can operate, simple operation, easy to understand. You can weld beautiful products without a teacher.

The welding workpiece is flat, smooth, beautiful, no need to grind, polishing or simple processing. It just simplifies the polishing, saves time and cost.

Can laser welding replace traditional welding

Hand held laser welding machine vs argon arc welding

Welding process for dissimilar parts:

Argon arc welding: it is the way of spot welding, also known as spot welding. The spot welding of the workpiece is a welding scar and overlap. The heat effect is very large, and the post-treatment absolutely needs to be polished, otherwise there will be scar. Auxiliary welding wire is required.

Hand held laser welding: laser continuous light, because the laser does not contact the workpiece itself, the use of high temperature light, instantly melt metal, produce molten pool, with gas evenly fill the weld and cooling stereotypes. Hot or cold instantly, with very little heat effect, almost has no heat effect, beautiful weld, no welding scar. Later according to customer demand, the welding part can be used directly without grinding

Welding of stainless steel square tube

Welding of stainless steel square tube

Thickness requirements:

Thin plates cannot be welded by argon arc welding. It has a great heat effect and can’t weld sheet metal less than 1 mm.

Hand held laser welding is suitable for thin plate welding within 3mm. And argon arc welding method should be chosen if the thickness of sheet metal is over 4mm.

Suitable process and function

Argon arc welding: suitable for stiffeners or fasteners, such as the welding of 4mm+ plate or pipe, bed body. If it does not require accuracy and beauty, only for reinforcement and bearing, then it has enough advantages. It can always dot, stack thickness, strengthen the workpiece itself, and do not need to pay attention to beauty. The product added value is also different from this. In this case, there is no need to choose laser welding.

Hand held laser welding: suitable for parts that require beautiful appearance, support parts and structural parts.

In case of missing or false welding

Argon arc welding: repeat spot welding on the original welding workpiece, there will be a pit, a point is a pit. In the later stage, if the welding is not good and can not be repaired, the more the place is repaired, the easier it is to collapse. The cost of large parts is very high. If it is scrap, the cost is very high.

Hand held laser welding: can repair welding, and the wordpiece can be welded flexible. You can also fill the welding wire according to the actual demand, and polish it slightly later.

welding with filler wire

welding with filler wire

Thermal effects

Argon arc welding: the heat effect is big, the heat dissipation is slow, the welding spot to the metal part is all red, very hot.

Hand held laser welding: no heat effect, fast heat dissipation.

Mobile flexibility

Argon arc welding: 3 meters long, behind a motor box (gun body) which is not easy to move.

Hand held laser welding: 5-20m long, easy to move.

Risk factor

Argon arc welding: big spark, easy to splash on the body and face

Hand held laser welding: no spark, laser protective glasses.

Worker requirements

Hand held laser welding: simple operation, 3 hours training can start welding products. Ordinary workers are easy to use.

Efficiency comparison

Hand held laser welding is 10 times faster than argon arc welding.

Welding load, or tension

Combined with the welding thickness and power, different power corresponding to the thickness can achieve full welding, complete penetration of the workpiece.

The place of penetration welding will be more solid than the material itself, because after being heated, it will be cut off, and it will be more firm and wear-resistant after the second heating and forging.

Customers can make samples to do their own tensile test, maybe the welding place is not broken, the none welding place is broken first.

Swing head handheld laser welding machine

Swing head handheld laser welding machine

Welding temperature

The maximum welding temperature can reach 4000 ℃, that is, heating and cooling instantly which can be controlled, and the heat effect is small.

Single side welding and double-side welding

Generally, the firmness of one-sided welding is not as good as that of two-sided welding. The surface of two-sided welding is heated more evenly and looks better, with less heat effect and minimum deformation.

Single side welding, the pursuit of beauty, or the pursuit of firmness, if you want to make it firm, you need to slow down the welding, then the heat will be a little more, and the heat effect will be greater.

Manual operation and daily maintenance of handheld laser welding machine

  • The hand-held laser welding machinist must undergo professional training, understand the use of system indicator lights and buttons, and be familiar with the most basic equipment knowledge;
  • Before the operation of the hand-held laser welding machine, the detection work trunking and wires are not damaged and exposed; it is strictly forbidden to put sundries and tools on the robot body, external shaft, gun cleaning station and water cooler;
  • It is strictly forbidden to place liquid objects, inflammables. The temperature of the operating room shall not exceed 25 ℃, and there shall be no leakage.
  • 4. Do a good job of testing regularly.
  • Because the welding machine is forced air-cooled, it is easy to inhale dust from around and accumulate in the machine. Therefore, you can use clean and dry compressed air to clean the dust inside the welder regularly.
  • Regularly check the wiring parts of the power wiring.
  • In the annual maintenance and inspection, the replacement of defective parts, the repair of shell and the reinforcement of insulation deterioration parts should be carried out.
  • Regularly check and replace the conductive nozzle
  • Clean and replace the spring hose regularly
  • Inspection of insulating rings

The above regular maintenance and inspection can reduce the occurrence of welding faults. Although it takes some time and energy, it can prolong the service life of the welding machine, improve the operation efficiency, ensure the performance of the welding machine and improve safety.

In addition, in the process of using hand-held laser welding machine, safety protection can not be ignored.

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