What is laser welding machine?
The laser welding machine is a machine that uses high-energy pulse laser to irradiate the workpiece to achieve the purpose of welding.
It can adjust the energy of pulse laser by setting different laser frequency and pulse width, so as to weld the workpiece accurately.
Types of laser welding machines
The laser welding machine is also often called energy negative feedback laser welding machine, laser cold welding machine, laser argon welding machine, laser welding equipment, etc.
According to its working mode, it can be divided into laser mold welding machine (manual laser welding equipment), automatic laser welding machine, jewelry laser welding machine, laser spot welding machine, optical fiber transmission laser welding machine, galvanometer welding machine, handheld welding machine, etc.
The special laser welding equipment includes sensor welding machine, silicon steel sheet laser welding equipment and keyboard laser welding equipment.
Weldable graphics include: point, straight line, circle, square or any plane graphics drawn by AutoCAD software.
Working principle of laser welding machine
The laser welding machine is a machine that uses the characteristics of laser to realize workpiece welding.
Laser welding is to radiate the high-intensity laser beam to the metal surface. Through the interaction between the laser and the metal, the metal absorbs the laser and converts it into heat energy, so that the metal melts and cools and crystallizes to form welding.
Mechanism of two kinds of laser welding
1. Heat conduction welding
When the laser irradiates the material surface, part of the laser is reflected and part is absorbed by the material, which converts the light energy into heat energy and heats and melts. The heat of the material surface layer continues to transfer to the depth of the material in the form of heat conduction, and finally, the two weldments are welded together.
When the laser beam with high power density irradiates the material surface, the material absorbs light energy and converts it into heat energy. The material is heated, melted and vaporized to produce a large amount of metal steam. Under the reaction force generated when the steam exits the surface, the molten metal liquid is pushed around to form pits. With the continuous irradiation of the laser, the pits penetrate deeper. When the laser stops irradiation, the molten liquid around the pit flows back, and the two weldments are welded together after cooling and solidification.
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.
Parts and functions of laser welding machine
Laser welding is an efficient and precise welding method using high energy density laser beam as heat source.
Laser welding is one of the important aspects of the application of laser material processing technology.
In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding.
The welding process belongs to heat conduction type, that is, laser radiation heats the surface of the workpiece, and the surface heat diffuses internally through heat transfer. By controlling the parameters such as laser pulse width, energy, peak power and repetition frequency, the workpiece melts and forms a specific molten pool.
Because of its unique advantages, it has been successfully applied to the precision welding of micro and small parts.
A complete laser welding machine is mainly composed of five parts.
Part I: laser welding host
Laser welding host mainly produces laser beam for welding, which is composed of power supply, laser generator, optical path part, control system and so on.
Some low-power lasers are usually built into the automatic worktable of laser welding.
Part II: cooling system
The cooling system provides cooling function for the laser generator, which is generally equipped with 1-5 HP water circulating chiller.
Part III: laser welding automatic worktable or motion system
The system is used to realize the automatic welding function of laser by moving the laser beam according to the welding track according to specific requirements. Generally, there are three motion control forms:
- The workpiece moves and the laser head is fixed;
- The laser head moves and the workpiece is fixed;
- Both the laser head and the workpiece move;
The whole system compiles the motion control program through CNC programming to control the movement of the worktable according to the requirements, and the simplified programming system has the advantages of simple operation, no professional technology or educational foundation, and can support and grasp quickly.
Common workbench systems on the market include:
- Manipulator motion system;
- 3D workbench;
- Four axis linkage workbench;
- Gantry welding workbench;
- Cantilever workbench, etc;
Both of them can realize precise welding motion control.
Part IV: tooling fixture
Generally, in the process of laser welding, the laser welding fixture is mainly used to fix the welded workpiece, and enable it to be loaded, unloaded and positioned repeatedly, so as to facilitate the automatic laser welding.
Therefore, fixture is one of the essential equipment in laser welding production. Especially in batch production, whether the fixture is designed in place will directly affect the production efficiency and yield.
Part V: observation system
Generally, the laser welding machine shall be equipped with an observation system, which can carry out real-time microscopic observation on the workpiece, which is used to facilitate accurate positioning when compiling the welding program and inspect the welding effect during the welding process. Generally, it is equipped with CCD display system or microscope.
Characteristics of laser welding machine
Characteristics of laser welding:
High aspect ratio, small weld width, small heat affected zone, small deformation, fast welding speed, flat and beautiful weld, no treatment or simple treatment after welding, high weld quality, no pores, accurate control, small focusing light spots, high positioning accuracy, easy to realize automation.
Characteristics of laser welding machine:
The laser welding machine has a high degree of automation and simple welding process.
The non-contact operation method can meet the requirements of cleanliness and environmental protection.
Using a laser welding machine to process workpieces can improve work efficiency.
The finished workpieces have a beautiful appearance, small weld, large welding depth and high welding quality.
The laser welding machine is widely used in dental denture processing, keyboard welding, silicon steel sheet welding, sensor welding, battery sealing cover welding and so on.
However, the cost of a laser welding machine is high and the precision of workpiece assembly is also high. There are still limitations in these aspects.
Specifications of laser welding machine
Laser power density
Laser power density is one of the most critical parameters in laser processing.
With high power density, the surface layer can be heated to boiling point in microsecond time range, resulting in a large amount of vaporization.
Therefore, high power density is favorable for material removal processing, such as punching, cutting and engraving.
For low power density, it takes several milliseconds for the surface temperature to reach the boiling point. Before the surface vaporization, the bottom layer reaches the melting point, which is easy to form a good melt welding.
Therefore, in conductive laser welding, the power density is in the range of 104 ~ 106W/cm2.
The pulse waveform is an important problem in welding, especially for sheet welding.
When the high-intensity beam hits the material surface, some energy on the metal surface will be lost by reflection and the reflectivity changes with the surface temperature.
The reflectivity of the metal varies greatly during a pulse.
Pulse width is one of the important parameters of pulse welding. It is not only an important parameter different from material removal and material melting but also a key parameter to determine the cost and volume of processing equipment.
Effect of defocus
Because the power density of the spot center at the laser focus is too high, it is easy to evaporate into holes.
The power density distribution is relatively uniform on each plane away from the laser focus.
There are two defocusing modes: positive defocusing and negative defocusing.
If the focal plane is above the workpiece, it is positive defocus, otherwise it is negative defocus.
According to the geometrical optics theory, when the distance between the positive and negative defocus planes and the welding plane is equal, the power density on the corresponding plane is approximately the same, but in fact, the shape of the molten pool is different.
When negative defocusing, greater penetration can be obtained, which is related to the formation process of the molten pool.
Parameter table of laser welding machine
|Diameter||Joint form||Spec.||Joint performance|
|output power/J pulse||Pulse width/ms||Max load/N||Resistance/Ω|
|Copper and tantalum||Φ0.38||butt-joint||10||3.4||17||0.001|
Advantages of laser welding machine
With the continuous upgrading of laser welding technology, laser welding technology has undergone a qualitative leap.
Now, laser welding machine has been used in many fields, such as high-tech electronics, automobile manufacturing, precision machining and so on.
As a direction of laser application, laser welding is the combination of current technology and traditional technology, but it has different advantages from traditional processing.
10 advantages of laser welding machine
1. Good laser beam quality
After laser focusing, the power density is high.
The focal spot diameter is small after focusing high-power low-order mode laser.
2. Laser welding has the advantages of high speed, large depth and small deformation
Due to the high power density, small holes are formed in metal materials during laser welding, and the laser energy is transmitted to the deep part of the workpiece through the small holes, with less transverse diffusion.
Therefore, the material fusion depth is large in the process of laser beam scanning.
With high speed and large welding area per unit time.
3. Laser welding is especially suitable for welding precision sensitive parts
Because the laser welding machine has large aspect ratio, small specific energy, small heat affected zone and small welding deformation, it is especially suitable for welding precision and heat sensitive parts, and can eliminate post welding correction and secondary processing.
4. High flexibility of laser welding
Laser welding machine can realize welding at any angle and can weld inaccessible parts;
It can weld all kinds of complex welding workpieces and large workpieces with irregular shapes.
It has great flexibility to realize welding at any angle.
5. Laser welding can weld difficult materials
Laser welding can be used not only for welding between a variety of heterogeneous metal materials, but also for welding between titanium, nickel, zinc, copper, aluminum, chromium, niobium, gold, silver and their alloys, steel, kovar alloy and other alloy materials.
6. Low labor cost of laser welding machine
Because the heat input of laser welding is very low and the deformation after welding is very small, a very beautiful welding effect can be achieved.
Therefore, there is little follow-up treatment of laser welding, which can greatly reduce or eliminate the labor in the huge polishing and leveling process.
7. The laser welding machine is easy to operate
The laser welding machine has the advantages of simple welding equipment, simple operation process, easy to learn and easy to use.
The professional requirements for staff are not high, saving labor costs.
8. The laser welding machine has strong safety performance
The high safety welding nozzle can only touch the switch when it contacts the metal, and the touch switch has temperature sensing.
There are safety precautions for the special laser generator during operation. During operation, it is necessary to wear laser generator protective glasses to reduce eye injury.
9. The working environment of laser welding machine is diverse
The laser welding machine can be used in various complex working environments and can be welded at room temperature or under special conditions.
For example, laser welding is similar to electron beam welding in many ways. Its welding quality is slightly inferior to electron beam welding, but electron beam can only be transmitted in vacuum, so welding can only be carried out in vacuum, while laser welding technology is more advanced and can be used in a wide range of working environments.
10. The welding system is highly flexible and easy to realize automation
However, laser welding machine also has some limitations.
Due to the high cost of laser holiday-related systems, the one-time investment cost will be higher.
In addition, the laser welding machine also requires high installation accuracy of weldments, and the position of the light source on commercial workpieces shall not have obvious deviation.
It can be seen that the ten advantages of laser welding machines are much better than traditional welding methods.
In the future, the application of laser welding technology will not be limited to the current electronic, automotive, instrument and other fields.
It will also be more extensive in the military and medical fields, especially in the medical field, which has broad prospects.
Laser welding vs other welding processes
|Comparison items||Laser welding||Electron beam welding||Tungsten inert-gas arc welding||Gas metal arc welding||Resistance welding|
|Large depth ratio||+||+||–||–||–|
|Small heat affected zone||+||+||–||–||0|
|High welding rate||+||+||–||+||–|
|Weld section morphology||+||+||0||0||0|
|Welding under atmospheric pressure||+||–||+||+||+|
|Welding high reflectivity materials||–||+||+||+||+|
|Use filling material||0||–||+||+||–|
Application of laser welding machine
Laser tailor welding technology has been widely used in car manufacturing. According to statistics, there were more than 100 laser tailor welding production lines worldwide in 2000, and continue to grow at a high rate.
In Japan, CO2 laser welding is used to replace flash butt welding for the connection of rolled steel coils in the steel industry. In the research of ultra-thin plate welding, such as foil with plate thickness less than 100 microns, fusion welding cannot be carried out, but YAG laser welding with special output power waveform is successful, which shows the broad future of laser welding.
Japan also successfully developed YAG laser welding for the first time in the world for the maintenance of steam generator tubes in nuclear reactors and also carried out gear laser welding technology in China.
With the continuous development of science and technology, many industrial technologies have special requirements for materials, and the materials manufactured by smelting and casting can not meet the needs.
Due to the special properties and manufacturing advantages of powder metallurgy materials, they are replacing the traditional metallurgical materials in some fields, such as automobile, aircraft, tool and cutting tool manufacturing.
With the increasing development of powder metallurgy materials, the connection between powder metallurgy materials and other parts is becoming more and more prominent, which limits the application of powder metallurgy materials.
In the early 1980s, laser welding entered the field of powder metallurgy material processing with its unique advantages, which opened up a new prospect for the application of powder metallurgy materials.
For example, the brazing method commonly used in the connection of powder metallurgy materials was used to weld diamond, which caused the melting and falling off of solder due to low bonding strength and wide heat affected zone, especially unable to adapt to high temperature and high strength requirements, laser welding can improve the welding strength and high-temperature resistance.
In the late 1980s, kW laser was successfully applied to industrial production. Now, the laser welding production line has appeared in the automobile manufacturing industry on a large scale and has become one of the outstanding achievements of the automobile manufacturing industry.
As early as the 1980s, European automobile manufacturers took the lead in using laser welding for sheet metal weldings such as roof, body and side frame. In the 1990s, the United States unexpectedly introduced laser welding into automobile manufacturing. Although it started late, it developed rapidly.
Italy uses laser welding in the welding and assembly of most steel plate components, and Japan uses laser welding and cutting processes in the manufacture of body panels. High-strength steel laser welding assemblies are more and more used in the manufacture of automobile bodies because of their excellent performance.
According to the characteristics of large batch and high degree of automation in the automobile industry, laser welding equipment is developing in the direction of high power and multi-channel.
In terms of process, Sandia National Laboratory of the United States and Pratt Witney jointly conducted research on adding powder metal and wire in the process of laser welding, and Bremen Institute of Applied Beam Technology of Germany conducted a lot of research on laser welding aluminum alloy body frame. It is considered that adding filler in the weld is helpful to eliminate thermal cracks and improve welding speed, To solve the tolerance problem, the developed production line has been put into production in the factory.
Laser welding has been widely used in the electronic industry, especially in the microelectronics industry.
Due to the small heat-affected zone, rapid heating concentration and low thermal stress, laser welding shows unique advantages in the packaging of integrated circuits and semiconductor device shells. In the development of vacuum devices, laser welding has also been applied, such as molybdenum focusing electrode and stainless steel support ring, fast heating cathode filament assembly, etc.
The thickness of the elastic thin-wall corrugated sheet in the sensor or temperature controller is 0.05-0.1mm, which is difficult to solve by traditional welding methods.
TIG welding is easy to penetrate, plasma stability is poor, and there are many influencing factors. However, laser welding has a good effect and is widely used.
Laser welding of biological tissues began in the 1970s. The successful welding of fallopian tubes and blood vessels with laser and its advantages have made more researchers try to weld various biological tissues and popularize it to the welding of other tissues.
The research on laser welding nerves at home and abroad mainly focuses on laser wavelength, dose, function recovery and the selection of laser solder.
Compared with the traditional suture method, laser welding has the advantages of fast anastomosis speed, no foreign body reaction in the healing process, maintaining the mechanical properties of the welding site, and the repaired tissue grows according to its original biomechanical properties. It will be more widely used in biomedicine in the future.
In other industries, laser welding is also gradually increasing, especially in the welding of special materials. Many studies have been carried out in China, such as laser welding of BT20 titanium alloy, HEL30 alloy and Li-ion battery. Germany has developed a new laser-welding technology for flat glass.
Development history of laser welding machine
Before the 1970s, because high-power CW laser had not been developed, the research focused on pulsed laser welding (PW).
Most of the early laser welding research experiments used Ruby pulse laser. The typical peak output power PM of 1ms pulse is about 5kW, the pulse energy is 1 ~ 5J, and the pulse frequency is less than or equal to 1Hz.
At that time, although the pulse energy was high, the average output power of these lasers was quite low, which was mainly determined by the low working efficiency of the lasers and the exciting properties of the luminous substances.
Due to its high average power, the laser soon became the preferred equipment for spot welding and seam welding after its emergence. Its welding process was carried out through welding spot lapping.
The laser seam welding with real significance was not realized until the birth of continuous power waveform laser with more than 1kW.
Present situation and the prospect of welding automation technology
With the increasing maturity of digital technology, the digital welding machine and digital control technology of dynamic grounding technology of representative office have steadily entered the market.
National large-scale basic engineering has effectively promoted the development and progress of advanced welding, especially welding automation technology.
The manufacturing of automobiles and parts requires the automation of welding with each passing day.
Since the end of the 20th century, the country has gradually promoted the basic welding method of automatic welding – gas shielded welding to replace the traditional manual arc welding, which has achieved initial results.
It can be predicted that in the future, automatic welding technology will develop at an unprecedented speed.
Current situation of high efficiency and automatic welding technology
In the 1990s, the welding industry took the realization of mechanization and automation of the welding process as the strategic goal, which has been implemented in the scientific and technological development of various industries.
It is developing welding production automation, researching and developing welding production line and flexible manufacturing technology, and developing computer-aided design and manufacturing; Flux-cored wire increased from 2% to 20%; Submerged arc welding materials will also continue to grow at the level of 10%.
Among them, the growth rate of flux-cored wire is significantly increased, which will exceed that of solid cored wire in the next 20 years, and will eventually become the leading product of the welding center.
Prospect of welding automation technology
The development of electronic technology, computer microelectronics and automation technology promotes the development of welding automation technology.
In particular, the introduction of unit technology such as numerical control technology, flexible manufacturing technology and information processing technology has promoted the revolutionary development of welding automation technology.
(1) The intellectualization of welding process control system is one of the core problems of welding automation, and it is also an important research direction in the future. We should carry out research on optimal control methods, including linear and various nonlinear controls. The most representative are the fuzzy control, neural network control and expert system of the welding process.
(2) Welding flexibility technology
In future research, we will organically combine various optical, mechanical and electrical technologies with welding technology to realize the accuracy and flexibility of welding.
The fundamental way to improve the level of welding automation is to transform the traditional welding process equipment with microelectronic technology.
It is our current research direction to combine numerical control technology with all kinds of welding machinery and equipment to improve its flexibility level;
In addition, the combination of welding robot and expert system to realize the functions of automatic path planning, automatic correction of trajectory and automatic control of penetration is the focus of our research.
(3) The integration of welding control system is the integration of human and technology and the integration of welding technology and information technology.
Information flow and material flow are important components of the integrated system. Promoting their organic combination can greatly reduce the amount of information and the requirements of real-time control.
Attention should be paid to giving full play to people’s response and judgment ability in control and on-the-spot processing, establishing a friendly man-machine interface, and making people and the automatic system harmonious and unified, which are the factors that can not be underestimated in the integrated system.
(4) Improving the reliability, quality stability and control of welding power supply, as well as excellent dynamic performance, is also the subject we focus on.
Develop a high-performance welder that can adjust arc motion, wire feeding and torch attitude, detect weld slope beginning, temperature field, molten pool state and penetration, and timely provide welding specification parameters. Actively develop the computer simulation technology of welding process, so as to make the welding technology evolve from “technology” to “science”, which is an important aspect of welding automation.
Why choose laser welding machine?
Laser welding machine saves time and energy
In any work, in order to better meet their own requirements and realize faster process flow, we need to invent some corresponding tools to help them complete the processing of some process flow and better save time and energy.
With the continuous development of technology, great breakthroughs have been made in these aspects. Good automatic operation can be realized in any work in daily life.
For each factory, it can better improve its production and supply efficiency, reduce costs and obtain better operation benefits.
In the process of welding, in order to better improve their operation speed, it is very necessary to choose some good tools. The laser welding machine is a good choice.
Laser welding can achieve a better production effect
For every user, why can laser welding machines achieve better work efficiency?
As new energy, it has a stronger working state and can complete the effective treatment of some materials. Some new welding methods are also selected in the welding process to ensure the welding effect and complete the operation of each user in a short time.
In the future market, people’s living efficiency and working state will be faster and faster. In order to achieve better production effect and meet the requirements of more users, every factory should constantly improve its technology, achieve more breakthroughs and improve the defects and deficiencies in all aspects, effectively improve some performance that should be improved.
Only by constantly starting from this direction can our products obtain better competitive advantages, bring better use effects to each user, and realize the effective cooperation between the two sides.
Laser welding machine brings more convenience to manufacturers
In my opinion, in the welding process, choosing a laser welding machine is a good choice, which can bring more convenience to manufacturers and achieve higher work efficiency. For each factory, in the process of operation, it can complete its own work within a certain time and better improve the operation efficiency of its own factory. It is also very necessary to complete the effective welding of some large tools and improve their own process flow.
If this link is not guaranteed, a lot of time and energy may be wasted when welding some large tools, which is what every user does not want to see.
The importance of choosing a suitable laser welding machine
With the continuous maturity and development of laser welding technology, different configurations of laser welding machine equipment also correspond to different effects.
However, among many businesses, is it right to choose the more expensive and better laser welding machine equipment?
The answer is, of course, No.
So how to choose laser welding machine equipment is the most appropriate?
Only when we understand it clearly can we know what benefits it is to us. Let’s talk about the importance of selecting the appropriate laser welding machine now!
Before customers choose laser welding machine equipment, our idea is that the selected laser welding machine equipment can meet my needs, realize my processing effect, and bring benefits and benefits to me. Such equipment is what I want.
However, for laser welding machine manufacturers, the price positioning of laser equipment is high-end and low-end. In terms of processing effect, high-end equipment can make the processing effect more complete, and the styles are also various, such as processing multi-materials, metal and non-metal.
The processing effect is also very good, but such equipment is also valuable.
Is it best to choose high-end laser welding machine equipment?
Of course not. If your material is aimed at non-metallic materials, there are no metal materials, and the processing effect is not as great as that, it is recommended to choose the general one.
Because the more functions, the better the effect of the equipment, the more products processed, the more expensive the machinery and equipment.
In addition, if you don’t use all of its functions when you buy it, you’ll spend money on furnishings, so it’s not worth it.
Only understand what you want to do with this machine and equipment, do the same or several products, and then make choices according to your own needs.
Therefore, when choosing laser welding machine equipment, only the right one is the best.
The so-called suitability means that the products of merchants can be processed, and the industries with the most applications can meet your requirements. The benefits it brings can meet your requirements. Such equipment is worth more and corresponds to the suitability.
What factors determine the price of a laser welding machine?
If you don’t say anything about this problem, you can be sure that the high-efficiency and high-quality laser welding machine is definitely worth buying!
However, there are tens of thousands to hundreds of thousands of laser welding machines on the market. A good laser welding machine can double your work success.
So what should we consider when we determine whether the laser welder is worth it?
The first is power.
Laser is the core of laser equipment. The higher the power, the higher the price. Because the higher the power, the higher the requirements of the laser rod and cooling system.
The configuration of laser welding machine involves many aspects:
Laser welding machines for different purposes have different configurations, such as mold welding for welding molds, jewelry welding for welding jewelry, vibration mirror welding inside automatic welding machine, optical fiber transmission laser welding machine, optical fiber continuous laser welding machine, etc.
The equipment configuration is different, and the price is also different.
In addition, automatic welding machines are generally more expensive than manual welding machines, because the automatic control system requires supporting automatic configuration such as CCD camera monitoring system.
3. Requirements for customization
There are also some customized needs, so the price will be higher.
For example, some production processes need to customize some automatic fixtures, modify the workbench, or add additional functional accessories.
4. Working methods
The laser welding machine must be equipped with worktable, such as galvanometer working mode, automatic working mode, spot welding working mode and handheld working mode. The worktable belongs to non-standard products and needs to be designed according to customer products, so the price is not fixed.
Imports are usually more expensive than domestic imports, and domestic prices are uneven.
It can be said that the price of accessories can vary greatly.
The brand will also affect the quotation.
The brand is also a point of view that can not be ignored.
Laser welding machines are often hundreds of thousands, with high technical content and high level of after-sales service, so they must be purchased from formal channels. It is recommended to find manufacturers for direct sales. Good brand technology is more mature, product quality is good, performance is stable, and after-sales guarantee is more perfect.
What is the price difference between different brands of laser welding machines?
At present, laser welding equipment has been widely used in digital products, energy batteries, hardware and plastics, kitchen and bathroom, machinery manufacturing, precision electronics and craft jewelry.
The brands of laser welding machines are different, but the structure is similar. What are the differences of all kinds of laser welding equipment?
Reasons for the price difference of laser welding machine brands:
1. Manufacturing cost
There are many brands of laser welding machines, each with its own advantages, but their structure is similar.
A laser welding machine is composed of laser generator, welding gun head, control motherboard, operating system, electrical circuit components, sheet metal shell and other components.
A piece of good equipment must choose better components, and the equipment composed of good components will be more stable and have higher performance.
The pursuit of the low price will start from the components, reduce the cost, and the corresponding price will be reduced.
2. Technical level
There are many manufacturers of laser welding machines, and the technical level is uneven. The technical strength of a manufacturer can be seen from the product composition, commissioning and after-sales maintenance of the equipment.
The corresponding cost of manufacturers with certain technicians will also increase. The equipment price of such manufacturers will not be too low, and some manufacturers without core technology will promote the market at a low price. The principle of dividing goods for every penny is very practical here.
3. After-sales service
Equipment transactions will involve after-sales problems.
For laser welding machine, long-term use is bound to have some problems.
How long the production will be delayed if there is a problem with the equipment is a great test of the manufacturer’s after-sales ability.
Excellent after-sales personnel will not only make customers produce better, but also increase the cost of manufacturers. For manufacturers without after-sales service, this service is less, and the corresponding price will be cheaper.
Which laser welding machine equipment manufacturer is good?
The development level of the manufacturing industry is one of the factors reflecting a country’s comprehensive strength, and can also reflect the range of national economic growth from the side.
With the continuous growth of the economy, people’s consumption concept has also changed, and the demand for product quality and function is higher and higher, which makes the laser welding equipment manufacturers need to constantly improve the manufacturing process, improve the quality and improve the production efficiency in order to win the demand of the market and the recognition of users.
At present, the demand of manufacturing enterprises for laser welding machine equipment is increasing. The reason is that laser technology is used for welding processing. It has the advantages of fast welding speed, firm and beautiful weld, no secondary grinding treatment, simple operation, automatic batch production and processing, greatly improving the work efficiency of product processing and reducing the employment cost for enterprises.
Therefore, there is a huge market demand for laser welding machine equipment, and there are many laser welding manufacturers on the market.
The quality level of various laser welding equipment is uneven, and the price ranges from tens of thousands of yuan to hundreds of thousands of units.
Facing many laser equipment manufacturers, many users do not know how to choose.
Which laser welding machine manufacturer is good?
Let me briefly introduce some factors that need to be referred to when purchasing laser welding equipment.
1. First of all, it is necessary to know whether their own welding needs match the welding function of the manufacturer’s equipment
Such as welding thickness, penetration requirements, etc.
2. The quality of the laser welding machine must be considered
After all, tens of thousands of yuan for a device is not a small amount. It’s best to go to the site for sample welding and understand whether the functional requirements of the device are appropriate before purchase.
3. Equipment selection of large brand manufacturers and small brand manufacturers
Some customers believe that the quality of laser welding machines produced by big brand manufacturers must be better than that of small companies.
In fact, there is no certain standard.
Users buy equipment to create value and make profits.
The equipment price of large companies is obviously much higher, which leads to an increase in cost. The equipment of non-large brand companies generally has great discounts in price, the quality is not necessarily worse than that of brand companies, and the cost performance is high, which is also worth considering.
The after-sales service quality of laser welding machine manufacturers is a matter of great concern to many consumers.
After the welding equipment is purchased, the manufacturer’s technicians are also required to go to the site for debugging, layout and choosing configuration according to the actual production situation.
If there is any problem with subsequent equipment or parts that need to be replaced, the manufacturer shall be contacted in time for treatment.
How to select a laser welding machine?
With the rapid development of laser technology, the brands of laser welding equipment on the market are diverse and the product quality is uneven. When buyers buy laser welding equipment, they generally don’t know where to start.
How should we choose suitable laser welding equipment?
When selecting laser welding machine equipment, we can choose from the following aspects:
1. First determine whether the product is suitable for welding with laser welding technology
When selecting laser welding equipment, we must first determine whether our products are suitable for welding with laser welding machine equipment.
We analyzed the situation of more than 200 customers in the past. There are two main types of products that are not suitable for laser welding:
- The weld is too large (generally more than 0.5mm);
- The thickness is too thick (generally more than 5mm).
The most suitable workpiece for laser welding is the thin plate workpiece with good consistency (the thickness is generally less than 3mm), and the weld width does not exceed 10% of the plate thickness. The double swing welding joint is required for the weld slightly exceeding the thickness, but the swing spot will cause laser energy dispersion and affect the cutting efficiency.
For workpieces with too large welds, we do not recommend that customers use laser welding. Similarly, thick plate laser welding is also due to high equipment costs and complex adjustment process. It is not recommended for customers at this stage.
For example, if the depth of product welding is between 2.5mm-3mm, and the depth of laser welding machine welding exceeds 3mm, it is certainly not suitable.
At present, most laser welding equipment manufacturers will provide free proofing service. Before purchasing, they must let the other party proofing to see the effect and then determine whether the use of laser welding equipment can meet their own requirements.
Manual welding or automatic welding?
Laser welding belongs to precision welding, which includes two aspects: one is the good effect of welding precision products, and the other is the high requirements for the welds of welded products.
If there are more than 15 wires in the weld, the welding wire must be filled, and the manual welding machine can only be used;
On the contrary, if the weld is less than 15 wires, automation can be realized. No gap is the best, because laser welding is realized by self melting the sample.
If there are many types of workpieces, each batch is few, and it is too cumbersome to make the tooling, or the workpieces are difficult to locate, the welding position is difficult to reach, and spot welding is most common, then the hand-held laser welding can be considered.
Handheld laser welding machines have been very popular in the past two years, but in fact, they are useless and can’t be right. Most customers have been cheated by unscrupulous and unscrupulous businessmen.
Because manual laser welding is difficult to control the position of light spot and focus, and a slight deviation will affect the welding effect, the welding consistency of this method is very poor, and it is difficult for manual operators to weld continuously for a long time.
In addition, the risk of manual laser welding is relatively large, and the harm caused by accidents is also great.
Customers must be careful when choosing hand-held laser welding, and should not be blinded by the welding video.
After that, let’s talk about the way of automatic laser welding.
If the customer’s welding track is complex, there are many curve tracks, special-shaped tracks, or several surfaces need to be welded at the same time, we recommend handheld laser welding machine.
It not only has high flexibility, but also cooperates with special tooling and linkage workbench, which can be clamped in turn, fully automatic welding, and realize multi-machine cooperative welding.
If the customer’s workpiece is simple, there are many long and straight seams, or the intersecting line welding of standard pipe fittings, we recommend the modular laser welding machine.
2. Select the power of laser welding machine according to their own product attributes
Laser generator is the core component of laser equipment. Generally, the higher the power, the higher the price.
This is because the higher the power, the higher the requirements for laser rod and cooling system in hardware configuration;
Generally, the greater the welding depth and thickness, the greater the power of the laser welding machine.
If you require a welding depth of 0.5mm, a 200W laser welding machine is OK.
It should be noted that in case of penetration welding and spot welding, 200W is sufficient;
For continuous welding, it is better to use a slightly higher laser power, because the 200W laser welder can weld 0.8mm at the deepest;
For continuous welding, the welding depth is about 0.5mm, so it is better to choose a 250W or 300W laser welding machine.
The deeper the welding depth, the greater the power of the corresponding laser welder.
3. Select the corresponding hardware configuration and the main purpose
The hardware configuration of laser welding equipment involves many fields, and the hardware configuration of laser welding machine equipment for different purposes is different.
For example, welding sheet metal box, fillet welding and overlap welding of stainless steel and carbon steel, optical fiber laser welding equipment, etc. the hardware configuration is different and the price is also different.
For example, penetration depth, penetration width, tensile force or air tightness requirements, welding length, weld shape, etc., which determine our choice of laser power, core diameter, welding joint proportion, manipulator spread, ground rail length, welding process, etc.
4. Make reasonable selection according to cost budget and purpose
Some people choose foreign brands, the price is higher.
In fact, the price of domestic laser welding machine equipment has more advantages. Now our domestic technology is constantly updated. In fact, domestic laser technology has already reached international standards. If there are after-sales problems, it will be more guaranteed and more convenient.
We can choose according to our own cost budget and purpose.
After reading the above four key factors, I believe you already know how to choose one laser welding machine that suits your practical demands.