Why choose laser for tube cutting?
The laser has three characteristics: good monochromatic, coherent and parallel.
Therefore, it is particularly suitable for material processing.
Traditional domestic pipe cutting methods are mainly hand saw cutting, sawing machine cutting, roller extrusion, abrasive wheel cutting and gas welding cutting, etc.
These processing methods basically have the disadvantages of low cutting efficiency and high labor intensity, while laser cutting is widely used in the industrial field due to the advantages of faster processing efficiency and good processing effect.
With the development of science, technology and industry, pipe manufacturing parts have been widely used in industrial sectors such as aircraft manufacturing, engineering machinery, transportation, petrochemicals and livestock farming.
In actual production, the tube has the advantages of low production cost, good formability, light weight of structural parts and material saving, so tube cutting has an important position in the industrial field.
Because the shape, size and application of the tube are different, and the cutting of the tube is subject to factors such as processing quality, it is crucial to select reasonable machining equipment, processing methods and technological measures.
However, there are many drawbacks to pipe cutting. Even if traditional cutting methods can achieve the application effect, the processing efficiency is low and the processing efficiency is low.
Therefore, the combination of pipe cutting and laser technology will make the field of pipe cutting have a broader development prospect.
What is tube laser cutting machine?
The tube laser cutting machine is mainly used to cut various metal hollow round tube materials, such as stainless steel tubes, carbon steel tubes, galvanized tubes and other industrial and civil metal tubes.
This type of pipe is generally used in building materials, industrial pipes, office furniture, sports and fitness equipment and so on.
The tube laser cutting machine adopts fiber laser and is the preferred cutting machine for small and medium-sized enterprises.
With the maturity and rapid development of laser technology, it began to be widely used in various sectors.
Laser cutting technology has also evolved from cutting metal sheets to cutting metal pipes.
The birth and application of professional laser tube cutting machine has greatly improved the processing efficiency of metal tubes.
Tube Laser Cutting Machine Parts and Components
The tube laser cutting machine is a state-of-the-art mechanical equipment for precision processing and cutting of tube raw materials. It is generally composed of laser generator, load-bearing base, cutting head, tube clamping chuck, cooling device and control system.
Working principle of tube laser cutting machine?
Laser tube cutting machine is a high-efficiency metal tube cutting machine. The main principle is to use laser irradiation to cut various graphics on pipe fittings and profiles.
It is a processing method that does not touch the surface of the part.
The tube laser cutting machine is a high-tech product that integrates numerical control technology, laser cutting and precision machinery.
With the characteristics of professional performance, high speed, high precision, high efficiency and high cost, it is the preferred equipment in the non-contact metal pipe processing industry.
The tube laser cutting machine has great freedom and strong compatibility with the tube material, shape, size and processing environment.
The new tube laser cutting machine can even cut metal materials with strong symmetry, such as I-beams and angle steel.
It has excellent spatial controllability (change of direction, rotation, scanning, etc.) and time controllability (on, off, pulse interval) and is easy to control.
Due to the high precision and less burr of laser cutting, the time consumed by subsequent processing is greatly reduced.
When changing the diameter or shape of the tube, simply modify the program.
Therefore, the development of pipe cutting software is of great research value.
The combination of laser cutting system and computer numerical control technology can form efficient automatic equipment, which is a high-quality, efficient and low-cost processing technology.
Advantages of tube laser cutting machine
The cutting principle between laser cutting machine and flatbed laser cutting machine is not much different.
As a special laser cutting machine, the tube laser cutting machine is mainly used for standard metal tubes (round tube, rectangular tube, oval tube, etc.), profiles (channel steel, angle steel, etc. .) and part of the molded tube.
The advantages over traditional processing techniques are as follows:
- It has high cutting precision and the contour accuracy can reach ±0.05mm.
- The cut is flat, without burrs, fine slit and less material loss.
- It is non-contact processing and the laser cutting of the heat-affected zone is very small, with almost no deformation.
- It has high cutting efficiency, which can achieve mass production.
- It has good flexibility, being able to change or replace the product at any time with the use of the professional CNC system and material programming software suite.
Thus, laser pipe cutting machines can replace mechanical drilling, milling, sawing, punching or burr cleaning and other processes that require hard equipment and tools for processing various metal pipes.
It can perform cutting, chamfering, grooving or hole cutting, scoring and other possible size and shape characteristics of complex tubular structures, etc., which is widely used in the processing of sheet metal, kitchenware, lighting, automotive, medical equipment , hardware, fitness equipment industries.
Classification and characteristics of laser tube cutting machine
With the rapid growth of metal pipe production and consumption, laser pipe cutting machine equipment is quickly popularized.
At present, there are a wide variety of laser tube cutting machines on the market, which can be divided into two categories according to the tube axial feeding method.
Fixed Material Cutting Type Laser Tube Cutting Machine
This type of laser tube cutting machine only processes fixed length tubes, which are mainly used to process the tube surface contour with constant axis and variable cross section, the two ends of the tube cannot be processed .
Although cut-to-length laser tube cutter has great limitations and low productivity, it occupies a large market share due to its special features.
Figure 1 shows the decorative pattern on the surface of a lamp stem and lampshade processed by a fixed material cutting laser tube cutter.
Fig.1 Lamp stem and lampshade processed by a laser tube cutter with fixed material cutting.
Working principle
As shown in Fig. 2, the laser tube cutter for cutting fixed material consists of two clamping chucks that hold the tube in place, the chuck makes a synchronous rotational movement around the tube axis, and the laser head makes axial and radial tube feeds for cutting.
Laser Tube Cutter for Feed Cutting
This type of laser tube cutting machine is mainly used for processing coaxial tube of the same cross section, which can not only process various contour shapes on the tube surface, but also can cut according to the designed length of the tube part within the designed travel of the machine.
Compared to laser tube cutter for fixed material cutting, it is more flexible, scalable and higher cutting efficiency, which currently occupies most of the professional laser tube cutter market.
As shown in Figure 3, the feed cutting laser tube cutter can be used to batch process various standard metal tube profiles such as square and round tubes and cut them.
Fig.3 Square and round tubes processed by a laser tube cutter with feed cutting.
Working principle
As shown in Figure 4, the tube is clamped by a clamping mandrel, the support mandrel holds the tube radially.
All the chucks around the tube axis synchronous rotary movement, clamping chuck fixed tube to do axial feeding, the laser head to do radial tube feeding and cutting.
At present, the feed cutting laser tube cutter is mainly based on two chucks on the market, which is economical, but its shortcomings are also obvious.
Fig.4 Working principle diagram
1) Poor stability of cutting accuracy
For tubes with very long parts or low rigidity, with deformation due to gravity plus the action of the centrifugal force of rotation of the mandrel, even if the servo roller or forming wheel support is increased, it is difficult to guarantee the stability of cutting accuracy.
2) Tail material, even though the laser head can cross the supporting mandrel cutting, but the clamping end of the mandrel still cannot cut, resulting in tube waste.
To solve these shortcomings, some equipment manufacturers use two mandrel-feed laser tube cutting machines as the basis, expanding the design of multi-mandrel laser tube cutting machine, as shown in Figure 5.
Between them,
1) It increases a set of supporting chuck and can ensure that a certain length of pipe almost free from deformation by gravity and centrifugal force of chuck rotation, which can effectively guarantee the stability of cutting precision and cutting length of parts is not limited in the machine's travel range.
2) It raises a set of clamping mandrels for material capture, when the feed mandrel is in the limit position, the tube is clamped by the capture mandrel to make axial feeding movement, which can ensure most of the cutting of material with zero pipe tail.
3) Although the above design can completely solve the shortcomings of the two chuck feed cutting type laser tube cutter, the increase in the cost of chucks, the number of servo shafts and the CNC system.
This also explains why the current multi-chuck feeding and cutting type laser tube cutter has not become a mainstream trend.
How to use tube laser cutting machine?
First, the focused laser beam must be synchronized with the cut tube in the automatic tube cutting production line;
Secondly, it is necessary that the laser beam after focusing can rotate a circle relative to the tube to be cut, and the laser beam axis always intersects perpendicularly with the tube axis.
During the cutting process, the laser beam of the tube cutting production line moves with the tube to be cut.
These synchronous movements must be controlled by a special control system, which is why the study of the automatic production line for laser tube cutting is of great importance.
Because the tube laser cutting machine adopts a non-contact processing method, it will not exert any pressure on the tube wall during the entire processing process, so it will not cause deformation or collapse of the outer surface of the tube.
Which auxiliary gas cutting is best for laser tube cutting machine?
Auxiliary gas is one of the important components of laser tube cutting machine.
The main function is to blow away the iron scraps generated by cutting the tube through the high-pressure auxiliary gas ejected by the laser head when the laser head of the laser tube cutting machine is cutting the tube, so as to achieve the effect ideal cut.
Secondly, it can protect the lens and prevent iron debris during cutting from jumping into the lens to affect the laser beam output and effect during cutting.
Currently, there are three commonly used auxiliary gases for laser:
① air ② oxygen ③ nitrogen;
How can we choose auxiliary gas to get better cutting effect in daily life?
- Air
Air is the lowest-cost auxiliary gas among the three common auxiliary gases.
Of course, it cannot be used for laser cutting by simply breathing air.
The air used by the laser cutting machine can only be used after the water, oil, dust and other impurities in the air are filtered through the filter and the filtered air is compressed to about 20 kg by the air compressor.
It is suitable for aluminum, aluminum alloy, galvanized steel and other thin tubes, as well as in the case where the cutting requirements are not too high.
- Oxygen
Oxygen here refers to gas with a purity of 99.5%.
The laser tube cutter cuts the metal at the cutting site by melting and evaporating the high temperature generated by the laser focus to realize laser cutting.
While oxygen contributes to the aerobic reaction of laser metal and improves cutting efficiency.
At the same time, the oxygen oxide film on the surface of the tube contributes to the absorption of the light beam by the reflective material.
However, the surface after cutting will be black or dark yellow, which is suitable for cutting thick carbon steel pipes.
- Nitrogen
Nitrogen is the most expensive auxiliary gas among the three auxiliary gases.
Since nitrogen is an inert gas, the reaction of oxygen on the cutting surface of the pipe is suppressed during cutting with the laser pipe cutter, unlike cutting with oxygen.
Therefore, the surface of the nitrogen-cut tube will be shiny and white.
However, due to cost, it is recommended to use nitrogen as an auxiliary gas when the pipe surface is relatively rigid.
The above three different auxiliary gases have their own advantages.
Therefore, when selecting other auxiliary gases, it is necessary to cut them according to the actual situation.
For those who are not familiar with the technology, do not arbitrarily set and modify the gas auxiliary cutting, which will easily generate burrs and cause poor stability of the laser tube machine.
Key tube laser cutting technology
G UID and F light hiding S system
In a laser cutting device, the function of the light guidance system is to direct the beam output of the laser generator to the cutting head of the focusing light path.
For tube laser cutting, if you want to obtain a high-quality cutting slit, the small diameter and high power of the focusing beam focus point are required.
This allows the laser generator to perform lower order mode output.
In tube laser cutting, to obtain a relatively small beam focusing diameter, the laser must have a small transverse mode order time, preferably a fundamental mode.
The cutting head of the laser cutting device is equipped with a focusing lens. After the laser beam is focused by the lens, a small focused spot can be obtained, so that high-quality tube cutting can be carried out.
Trajectory C control of C revealing Head
In pipe cutting, the pipe to be processed belongs to a spatial curved surface, and the shape of the pipe is relatively complicated.
If it is programmed and machined by conventional methods, there will be some difficulties.
This requires the operator to select the correct machining path and appropriate reference point according to the requirements of the machining process, and use the numerical control system to record the feed condition of each axis and the coordinate of the reference point and then record the coordinates of the machining process and generate a machining program through the linear and circular interpolation functions of the laser cutting system.
Therefore, studying the automatic vertical function of the laser beam and the cutting tube is also one of the important technical contents of tube laser cutting.
Automatic C laser control C revealing F focus P position
In order to ensure the cutting quality of laser cut tube, maintaining focus on the vertical direction of the workpiece surface through automatic measuring and control devices is the key to tube laser cutting.
Currently, we have integrated the laser focus position with the direct axis (XYZ) of the laser processing system, which makes the movement of the laser cutting head lighter and more flexible, and the focus position can be well understood, so so as to avoid collision of the cutting head with the cutting tube or other objects during processing.
Influence of Main P process P ammeters
Pipe laser cutting is becoming more and more used in today's industrial society, and the pipes to be cut are increasingly diverse.
Furthermore, the tube parts themselves have their own complexity.
Therefore, according to the material, shape and processing requirements of pipe cutting, choosing the appropriate laser cutting process parameters to obtain the best cutting efficiency and quality has become the most concerning issue for all laser users. laser cutting system.
- Influence of Laser P flower
For a continuous wave output laser generator, the laser power has an important effect on laser cutting.
In theory, the higher the laser power, the higher the cutting speed.
But considering the characteristics of the pipe itself, maximum cutting power is not the best choice.
When the cutting power increases, the laser mode itself changes, which affects the focus of the laser beam.
In practical processing, we often choose to obtain the highest power density in the case of less than maximum power, so as to ensure the efficiency and cutting quality of the entire laser cutting.
- C 's influence revealing S peed
When cutting the tube by laser, it must be ensured that the cut
the speed is within a certain range to obtain better cutting quality.
If the cutting speed is slow, excessive heat will accumulate on the surface of the tube, and the heat-affected zone will become larger, and then the crack will become wider. Furthermore, the incision surface is cauterized by the discharged hot melt material, which makes the cut surface rough.
When the cutting speed increases, the average circumferential slit width of the tube becomes smaller. The smaller the diameter of the tube, the more obvious the effect.
By accelerating the cutting speed, the laser action time is shortened, the total energy absorbed by the tube decreases, the temperature at the front end of the tube decreases, and the slit width becomes smaller.
If the cutting speed is too fast, the tube will not be cut or cut, which will affect the entire cutting quality.
- Influence of tube diameter
When laser cutting the tube, the characteristics of the tube itself can have a great influence on the processing.
For example, the size of the pipe diameter has a significant impact on the processing quality.
Through research into laser-cut thin-walled seamless steel tubes, it has been discovered that the tube diameter and slit width will continue to increase while various process parameters remain unchanged.
- Auxiliary gas type and pressure
When cutting non-metallic pipes and part of metal pipes, compressed air or inert gas such as nitrogen can be used as auxiliary gas.
However, for most metal pipes, active gas such as oxygen can be used.
After determining the type of auxiliary gas, it is also important to determine the auxiliary gas pressure.
When cutting a pipe with a small wall thickness at a relatively high speed, the auxiliary gas pressure must be increased to prevent the adhering slag from being trapped in the gap; When the wall thickness of the cutting pipe is large or the cutting speed is slow, the auxiliary gas pressure must be reduced appropriately to prevent the pipe from being uncut or cut.
The position of the beam focus is also vital for laser cutting of tubes. During cutting, the focus position is generally at the surface position of the cutting tube connection. When the focus is in a good position, the slit is the smallest, the cutting efficiency is the highest, and the cutting effect is also the best.
In most cases, the beam focus is adjusted below the nozzle and the distance between the nozzle and the tube surface is approximately 1.5 mm.
At the same time, factors such as laser pulse shape and light output mode also have a certain influence on the cutting effect.
Trends in laser tube cutters
High precision and high efficiency
The future demand for tubes is growing, the processing requirements will be higher and higher, and improving processing accuracy and production efficiency is a necessary factor in the rapid development of professional laser tube cutting machine.
Modularization
User requirements change over time and the modular design allows for the addition or replacement of functional components to meet user requirements and maximize benefits for both parties.
Automation
There are already many users equipped with automatic loading and unloading units, the development of automation can effectively free up the workforce, alleviating the problem of labor shortages in enterprises.
Intelligence
With the popularization of the concept of “Industry 4.0” and the maturity of the development of 5G technology, the future of laser tube cutting machine will certainly achieve full automation.
That is to say, it integrates information collection, order placement, feeding, loading, tube identification, length measurement, automatic call program cutting, unloading, palletizing and shipping, which finally realizes intelligence.
Current status and future development of tube I aser C revealing
There are many advantages of laser tube cutting, such as narrow incision width, small heat affected zone, fast cutting speed, good flexibility, smooth cutting and no tool wear.
With the emergence and development of CNC (Computer Numerical Control) laser cutting machines, the development of various techniques for machining freeform surfaces and curves in space can show their unique side.
In laser cutting, not only must the laser spot move in 3D space relative to the workpiece according to a certain trajectory, but also the laser axis must be perpendicular to the machining surface of the tube to be cut throughout the machining process.
For auto-focus CNC fiber laser cutting heads, the nozzles automatically track the surface of the workpiece through an automated measurement and control system.
Production practice indicates that the key to pipe cutting is to eliminate cutting quality defects as much as possible, so as to meet the pipe processing requirements.
For complex pipe processing such as drilling, grooving, trimming or undercutting, laser cutting is not only faster than traditional machining methods, but also ensures excellent processing quality.
O overview of Tube I aser C revealing
During processing, the cutting of the tube parts must be ensured first to obtain the blank with the required tube length.
The traditional pipe cutting method is difficult to meet the needs of mass production, and the pipe parts processed by these traditional processing methods often have poor cutting surface quality, and some even have processing defects such as deformation and collapse .
In addition to the need to cut the tube, some other forms of processing are required, such as pattern cutting for decoration and lamps, linear spiral cutting, sine, cosine and marking, etc.
If these forms of pipe machining use traditional methods, not only will the processing efficiency be low, but it will also be difficult to achieve optimal processing requirements, and some can even not be processed at all.
Advantages of tube laser cutting
The notch width is generally 0.1-0.3mm for laser tube cutting (includes straight cutting, chamfering and shape cutting).
The cutting position and temperature can be precisely controlled, which favors automation and intelligent production.
What's more, compared with the traditional processing method, the cutting efficiency can be increased by 8 to 20 times, the processing cost can be reduced by 70% to 90%, and the material loss can be saved by 15% to 30%.
Furthermore, the noise of laser cutting is low and the impact on the environment is also light.
Conventional machining methods that require multiple sequential processes to complete machining can be achieved by laser cutting on the same equipment.
With the continuous improvement of equipment performance and processing technology, high-quality pipe cutting can be achieved by laser.
The Future of Tube Development Is Revealing
Laser cutting adopts a non-contact processing method, which does not exert any pressure on the tube wall during the entire process, so it will not cause deformation or collapse of the outer surface of the tube.
At the same time, when cutting the tube by laser, the thermal field of the groove is complicated, cooling is difficult, and the cutting slag is easy to block, which increases the difficulty of cutting.
Therefore, it is necessary to strengthen the in-depth study of these aspects.
Laser cutting has great freedom in the requirements of tube material, shape, size and processing environment. Its spatial control (beam direction change, rotation, scanning, etc.) and timing control (on, off, pulse interval) are excellent and easy to control.
Additionally, the greater precision and fewer burrs of laser cutting greatly reduce the follow-up time spent processing.
When changing the diameter or shape of the tube, just modify the program, so the development of tube cutting software is of great research value.
The combination of laser cutting system and computer numerical control technology can form efficient automation equipment and open a new path for high-quality, high-efficiency and low-cost processing.
In order to improve the efficiency of pipe cutting, the use of automatic laser cutting production line is the most effective production method.
How to use automatic pipe cutting production line?
Firstly, the laser beam after focusing must work synchronously with the tube that will be cut by the automatic production line.
Secondly, it is necessary that the laser spot after focusing can be rotated a circle relative to the tube to be cut, and the laser beam axis is always perpendicular to the tube axis. During the cutting process, the laser beam of the tube cutting production line moves along with the tube being cut.
During the cutting process, the laser beam from the tube cutting production line follows the tube to be cut. These synchronous movements must be controlled by a specialized control system, so the research on automatic tube laser cutting production line is also very significant.
Conclusion
Pipe laser cutting is inseparable from hardware – laser cutting system (including laser generators) and software – laser cutting technology.
From the hardware perspective, the future laser cutting machine will develop in the direction of high speed, high precision, high automation, flexibility and diversification; From a software perspective, future laser cutting will be combined with CNC technology to develop new software.
Therefore, the collection and completion of laser cutting process data, the establishment and improvement of expert systems are of great importance and research value for the development of the entire laser cutting industry.
FAQ about tube laser cutting machine?
What are the factors that affect the service life of laser tube cutting machine?
Three Main Factors Affect the Service Life of Laser Tube Cutting Machine
1. Wear between the mechanical bearings of the laser tube cutting machine will also affect the service life.
During use, lubricant can be regularly applied to the gear bearings to reduce wear on the machine and keep it operating normally.
2. The working environment of the laser tube cutting machine must be kept clean.
When the equipment processes the workpiece, it will produce a lot of processing residual powder,
Irregular cleaning will cause dust accumulation and affect the normal operation of the equipment.
In addition, it is also necessary to check the straightness of the laser tube cutting machine track and the flatness of the machine tool, and adjust it in a timely manner if it is found to be abnormal.
Otherwise, it will increase the cutting error value of the workpiece, seriously affect the cutting quality and reduce the cutting speed.
3. The cutting head of the laser tube cutting machine needs careful protection, and the main part is the cutting head.
The cutting head is a very fragile and easily damaged part of the laser tube cutting machine.
During use, the cutting head must be prevented from colliding and must be cleaned and maintained regularly.
What are the punch cutting methods of laser pipe cutting machine?
As a thermal cutting technology, the laser tube cutting machine cannot avoid using punch cutting technology when cutting thick tubes;
Currently, there are two commonly used laser drilling methods: blast drilling and pulse drilling.
(1) Explosion drilling
After the material is irradiated by continuous laser, a hole is formed in the center, and then the molten material is quickly removed by the coaxial oxygen flow with the laser beam to form a hole.
Generally, the size of the hole is related to the thickness of the tube. The average diameter of the blast hole is half the thickness of the tube.
Therefore, the blast hole diameter for the thicker plate is large and not round.
It is not suitable for use on parts with higher requirements (such as oil screen seam tube) and can only be used on waste.
Furthermore, because the oxygen pressure used for drilling is the same as that used for cutting, spatter is large.
(2) Pulse piercing
Pulsed laser with high peak power is used to melt or vaporize a small amount of materials.
Air or nitrogen are often used as an auxiliary gas to reduce hole expansion due to exothermic oxidation.
The gas pressure is lower than the oxygen pressure during cutting.
Each pulse laser produces only small jets of particles and penetrates gradually, so the time to pierce the thick plate takes several seconds.
Once drilling is complete, the auxiliary gas is immediately replaced by oxygen for cutting.
The drilling diameter is smaller and the drilling quality is better than that of shot blast drilling.
The laser used for this purpose must not only have high output power;
More importantly, the time and space characteristics of the light beam, so the general cross-flow of CO 2 laser cannot meet the requirements of laser cutting.
Furthermore, a reliable gas path control system is required for pulse drilling to realize gas type and gas pressure switching and drilling time control.
In the case of pulse drilling, to obtain high-quality cuts, attention should be paid to the transition technology from pulse drilling when the workpiece is stationary to continuous cutting at constant speed of the workpiece.
At present, the tube processing range of the laser tube cutting machine is about 300mm in diameter.
Generally, tubes cut by the factory with laser tube cutting machine do not need to use this technology. You just need to know.
How to choose laser tube cutting machine?
In today's emphasis on quality, laser tube cutting machine plays a very important role in various metal processing industries.
To expand the market, many brands of small laser tube cutting machines have lowered their prices.
As a result, configuration and materials will be reduced appropriately and after-sales service cost will be saved.
They ignore the after-sales treatment of customers, and more equipment without strict control over products is sold, and the more serious the after-sales problems will be exposed.
In this case, the company will suffer a serious crisis of trust in the brand and word of mouth.
How to choose the brand when purchasing a laser tube cutting machine? Here are five suggestions that I hope will help you!
1. First of all, we should consider factors such as our own process range, the thickness of cutting materials and what materials need to be cut, and then determine the power of the equipment to be purchased.
Currently, the power of laser cutting machines on the market is between 500W and 6000W.
Professional brands of laser cutting machines can be customized according to customers' needs.
2. After the initial selection and demand determination, we can go to the market to know the brand and reputation of the laser cutting machine or the peers who purchased the laser cutting equipment.
Select a strong manufacturer for early communication and review.
In the later phase, we can carry out on-site investigations and more detailed discussions about machine price, machine training and payment method.
3. In the core part, some important parts of the laser tube cutting machine, especially the laser generator, laser cutting head, servo motor, numerical control system, laser lens, etc., should be distinguished from domestic or imported.
These components directly affect the cutting speed and precision of the equipment.
Professional laser tube cutting machine manufacturers will pay great attention to the configuration of these components!
4. Equipment operation should be simple and easy to use.
Companies using equipment can train personnel to operate in a short time, reduce learning time, and reduce the cost of using the equipment
5. After-sales service.
In the process of using laser tube cutting machine, it is inevitable to encounter some problems, so perfect after-sales service is particularly important.
Learn about the after-sales service of laser tube cutting machine brand manufacturers, which is helpful for further maintenance and equipment life!
