How to solve the problem of laser marking machine-No laser

How to solve the problem of laser marking machine-No laser

Laser marking machine is that laser beam mark permanent marks on a variety of different material surfaces.Marking is the evaporation of surface material to expose the deep material, so as to carve out the exquisite patterns, trademarks and text. Laser marking machine is divided into, CO2 laser marking machine, play semiconductor laser marking machine, laser fiber play standard machine, YAG laser marking machine, the laser marking machine is mainly used to require some finer, the higher accuracy of the occasion. Used in electronic components, integrated circuits (IC), electrical appliances, mobile communications, hardware, tools, accessories, precision instruments, watch glasses, jewelry, auto parts, plastic buttons, building materials, PVC pipe.
But if the laser marking machine meet the problem-no laser,how should we do?
Fault phenomenon: the laser is not normal, in the high voltage side, the string into the current table, the current table shows the exception, or on a long time there is a current, or sometimes no, sometimes not controlled.The main reason is that the type of laser is not selected, the main board, the wiring board, the power supply or the control line and the cooling water cycle system.

Elimination method:        
1,Parameter settings, see if the type of laser is correct, it is the main reason for the failure of continuous light.  
2,Pull the nine core control line, to see whether there is a control line loose. Connection is not reliable.        
3,The power supply control line (nine cell lines) removed, according to the key burst of laser power supply, the power supply is still a motherboard failure analysis.
4.Press laser,if can out laser,that shows the laser power supply is well.
5.If press laser,can not our laser,that shows the laser power supply has problem.
6.When the power supply is well, connected to the control line, with a multimeter measuring connection plate on the switch control pin, no light, normal voltage in more than 4 volts, less than 3 V, motherboard output is not well; light emitting, the voltage should be below 2 volts, higher than 2.5 V output is not well.
7.Check whether the water cycle is well,the water flow is enough, whether there is a problem of water protection.

Improve the efficiency of laser cutting machine

Improve the efficiency of laser cutting machine 

Laser cutting machine is mainly using laser beam to the plate surface and release energy to see steel melting and evaporation, because energy is highly concentrated can rapid local heating to melt and vaporize steel plate, because the energy is concentrated, just only a small amount of steel reached other parts, basic not caused any deformation, using laser can produce complex shape of the workpiece, the cutting of the workpiece, the does not need for the next step processing can be used directly.
Laser cutting machine has three advantages: good cutting quality, fast processing speed, clean, safe, no pollution, in the production of laser cutting machine power is certain, so I want to improve efficiency, it is necessary to adjust operation.

1 The learning and manipulation of new machines           

In the process of operation, the operator needs to strengthen the learning and skills of the machine performance through the daily production. To will work on an alternative practice, spare time to strengthen the machine in all aspects of knowledge learning, do meet machine appear small problem can be solved, the problem appeared to know where the problem lies, and help solve the problem.

2 Know how to modify the CNC cutting procedures           

For CNC laser cutting machine, make changes to the program, using linear surgical method, will drive up to the point on the arc, the cutting down of circular cross section is very smooth, to ensure that the quality of the parts.

3 Optimize the scheduling scheme           

Through consultation and the fish Technology Department of the workshop, the two beam sharing a common edge cutting, this does not affect to the cutting effect, so the efficiency is to artificially raise.

A comprehensive analysis of technology characteristic of laser cutting machine

A comprehensive analysis of technology characteristic of laser cutting machine

With the development of laser technology and mature, laser equipment has been widely application in all walks of life, such as laser marking machine, laser welding machine, laser drilling machine and laser cutting machine, and so on, especially CNC laser cutting machinery and equipment in recent years rapid development, is widely used in sheet metal, metal products, steel structure, precision machinery, auto parts, glasses, jewelry, nameplate, advertisement, arts and crafts, electronics, toys, packaging and other industries. Compared with other cutting equipment, CNC laser cutting machine is mainly reflected in the following aspects:

1, with high cutting speed, cutting quality is good, high precision;      
2, cut line is narrow, the cutting surface is smooth, does not damage the work piece;          
3, not affected by the shape of the workpiece, the material is not affected by the hardness;          
4, in addition to the processing of metal materials, but also for non metal cutting processing;          
5, saving investment, saving materials, more effective cost savings;      
6, the operation is simple, safe, stable performance, improve the speed of new product development, with a wide range of adaptability and flexibility.

Mechanical structure of metal CNC laser cutting machine is the most important part, not only most of the components are installed in the rack, and also the work gravity and acceleration and deceleration during the full impact loads.

CNC laser cutting machine design and development work including:

1, determine the CNC laser cutting equipment in a variety of conditions and the environment of fast, high precision, stable operation of the conditions.       2, according to the functional requirements of the frame structure, parameters, combined with the structural characteristics of the laser cutting machine, the establishment of the corresponding dynamic model.          
3, the structure and parameters of the frame are studied, the influence of the parameters on the static and dynamic stiffness and thermal stability of the frame are studied, and the theoretical basis for the design of the frame is provided. 4, determine the frame and other parts of the mutual coupling relationship

Therefore, CNC metal cutting machine designed in how to arrange the metals to reduce weight, increase body stiffness, reduce the effects of temperature change on accuracy, it is necessary to focus on the problems in the design process.
Therefore, in CNC metal cutting machine design how reasonable layout of metal, reduce weight, improve the body stiffness, reduce the influence of temperature change on the accuracy, is should be focus on the problem of the design process.
In the metal cutting laser circuit, there is a strong interference between analog signal and digital signal problem. Photoelectric isolation circuit is in electrical isolation to light for coal medium of transmission signal, the input and output circuit can isolate. So it can effectively suppress noise in the system, to clear the earth loop interference, responds faster, long service life, small volume, shock resistance etc. the benefits the in the strong - weak interface, especially in microcomputer system of backward and to the channel obtained widely application.

Photoelectric coupler has three characteristics:          
1, the signal is transmitted to take the form of electric light electricity, the light emitting part and the light receiving part are not in contact, which can avoid the feedback and the interference of the output end to the input end;     2, the ability to suppress noise interference;          
3, with a durable, high reliability and high speed and other advantages, the response time is generally within a few, the response time of high-speed optoelectronic coupler and some even less than 10ns.
Therefore, in the numerical control laser cutting machine system circuit design, should pay attention to the isolation of the input signal circuit and SCM connection. Here, the use of photoelectric coupling is the most commonly used method.
In the industrial manufacturing system of heavy metal processing industry, a lot of metal materials, no matter what kind of hardness it is, can be carried out without deformation cutting. Of course, for high reflectivity materials, such as gold, silver, copper and aluminum alloys, they are also good heat transfer conductor, so the laser cutting machine is difficult, and even can not be cut.
In spite of the laser cutting machine specific technology was a huge advantage, but as a high-tech equipment to use laser cutting machine to achieve the ideal cutting and processing effect, must also master the processing technical parameters and operation processes. Especially in the metal laser cutting machine cutting process, to select the appropriate cutting speed, or may cause some undesirable cutting results, mainly in the following:
1, when the laser cutting speed is too fast, it will cause the following adverse results:          
①.Method of cutting, spark spraying;          
②.The cutting surface is inclined to the lines, and the lower part of the production of molten stains;          
③.Cause the whole section is rough, but no melt stain is produced;
2, on the contrary, when the laser cutting speed is too slow, it will cause:   ①.Melting condition, the cutting surface is rough.          
②.The slit width, in sharp parts of the whole.          
③.Affect the cutting efficiency.
Therefore, in order to make the laser cutting machine equipment to better play its cutting function, you can cut the spark from the laser equipment to determine whether the feed rate is suitable:          
1, if the spark from the top down, it indicates that cutting speed is appropriate;          
2, if the spark back tilt, it indicates that the feed rate is too fast;       3, if the spark is not diffusion and less, together, it indicates that the speed is too slow.          
Most organic and inorganic materials can be used as laser cutting machine. Compared with other traditional cutting methods, laser cutting has obvious advantages compared with other traditional methods. Laser cutting machine has the characteristics of narrow slit, small deformation of the workpiece and high speed, high efficiency, low cost, safe operation, stable performance and so on.

Several major problems of laser cutting thick metal plate

Several major problems of laser cutting thick metal plate

Laser processing, as an advanced material cutting method, has been more and more accepted by the sheet metal producers. With the progress of computer control technology and optical technology, increasingly high expectations for its processing capacity, looking forward to this is not only to cut, it is to cut and sliced expectations. But can give the answer of course can not be separated from the processing machine performance, while the quality of processed materials directly affect the effect of the answer.
Laser processing started earlier in the Europe and the United States and Japan, in the eighties of the last century began by laser processing machine manufacturers of steel production put forward specific quality requirements, and the difference from the ordinary steel but the price is on the high side of laser special steel. And with the laser processing as the main cutting tool is accepted, 25mm the following common steel plate on the laser professional materials as a standard material. However, due to China's development is too fast, too late to adapt to the production of steel, there is a difference between China's steel and imported steel. The main difference is that the content of impurities in steel and the processing of steel surface and transport custody and a series of reasons, resulting in the current situation of Chinese sheet metal cutting.
Today, China's crude steel production is not only the world's first, is more than 50% of global output, developing countries, and even some like Australia, South Korea and other developed countries in order to save costs also used in a large number of board of China, so instead of expecting China steel to adapt to laser cutting as research and put forward to quality processing of inferior materials methods and proposal. Some of these ideas are presented in this paper.
Problems encountered in the processing of medium and heavy plate
1.Carbon steel plate perforation in processing thick plates perforated time accounted for a large proportion, the laser manufacturers have developed a technique for rapid perforation, more representative is high-energy perforation (hole), the advantages of this method is fast (1 second, to t16mm as an example, following the same), but the drawback is that the enormous energy not only affects the processing of small shape, perforation injection of the plate temperature elevated and the impact on the rest of the whole cutting process. With a small power pulse perforation, then a long time (12 seconds), will lead to the cutting efficiency and the unit cost of the increase.
2.Cutting surface quality problem          
Figure 1 and Figure 2 shows a section cutting processing plate often meet, such cutting not only product quality has been questioned, but also with the slag sticking of burn and severe, that reflected not expensive laser processing machine difference to other ways of cutting the value.

3.Stability of whole plate processing          
In the whole process of domestic steel, there will often be a local area of the phenomenon of poor processing. This kind of phenomenon is sometimes very random, even if the machine is in good condition, it will appear. In order to deal with the local fault products and greatly affect the whole work progress, this is not the cause of the processing failure also gives some of the author's analysis and countermeasures.

Solutions of the above problems
1.Peak perforation (HPP) scheme          
As the name suggests is the use of a small duty cycle of the peak pulse laser, combined with the material on the surface of the fuel injection is not fuel to clear the opening edge of the attachment, the reasonable frequency of the control pulse edge cooling edge. Is characterized by relatively deep hole, although a slightly longer time (3 seconds), but penetrated aperture small (about diameter 4mm) and open hole edge without attachments and into the heat is low, to facilitate the next normal cutting, compared to ordinary perforated is to improve the efficiency of 4 times. Figure 3 shows the difference between an ordinary perforation, a HPP perforation, and a high energy punch.

2.Cutting section improvement program          
For the carbon steel, the important factor to improve the cutting section is to control the heat input to the plate and to ensure the full combustion of the laser irradiation. MITSUBISHI motor development K-CUT processing conditions better to complete the mission. Fig. 4 Comparison of the effects of traditional and K-CUT conditions on the same piece of domestic plate. For stainless steel, the important factor to improve the cutting section is the improvement of the beam (improving the depth of focus) and the effective utilization of the auxiliary gas. The bright surface cutting technique is to improve the results obtained by the oscillator and the nozzle. Figure 5 is the effect after improvement. The lower part of the upper part of the section of rough 8 mu and 12 Mu as mechanical processing.

3.Scheme to ensure processing stability          
At present, in order to improve the running speed of the processing machine, the laser machine adopts the structure that is called the flight light path, that is, the material tray does not move and the processing head can move in the whole processing area. In order to compensate for the change of the relative position of the working head and the light source, the manufacturers can also ensure the consistency of the light spot in the range of processing. Although this method has simple structure, it will change the depth of focus, so that in the depth of the depth of the plate is very sensitive to cutting the thick plate will appear to be inadequate (both to keep the light spot and keep the focus depth constant). MITSUBISHI motor using the same length of light path (in the range of light source and the processing of the optical path between the processing head) can avoid the depth of focus changes, so that the spot and the depth of focus are consistent. In addition, the heat gained by the hot plate is controlled, which can solve the stability problem. Figure 6 shows the principle of long path and in the processing area at different points in the processing effect.

Take seriously the problems in the process, study the mechanism and find the solution to the problem. Through the traditional laser technique, a series of exploration and improvement, for more complex plate cutting developed new technology and its application to the ex plus, Rx, XL, etc. series of products, to meet the actual needs of customers in the domestic plate materials processing, thereby greatly improving the production efficiency. We will further efforts to explore new technologies to solve more difficult problems in the processing of the majority of users.

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JINAN XIAOJIA CNC MACHINERY EQUIPMENT CO.,LTD

The essential difference between the four types of laser cutting technology

The essential difference between the four types of laser cutting technology
Laser cutting is irradiated materials rapidly melting, vaporization and ablation or achieve ignition, with high power density laser beam irradiating a work, at the same time with coaxial with the beam of high speed airflow blow in the molten material, so as to realize the workpiece cut. Laser cutting is one of the hot cutting methods.
Laser cutting can be divided for laser vaporization cutting, laser fusion cutting, laser oxygen cutting and laser scribing and breaking control four categories.

1.Laser vaporization cutting
Using high energy density of laser beam heating the workpiece, so that the temperature rose rapidly, in a very short period of time to reach the boiling point of the material, the material began to vaporization, the formation of steam. The steam jet is very large, and in the same time, it forms a notch on the material. The vaporization heat of the material is generally very large, so the laser vaporization cutting requires a great deal of power and power density.
Laser vaporization for cutting thin metal materials and nonmetal materials. (such as paper, cloth, wood, plastic, rubber, etc.)

2.Laser melting and cutting
Cutting laser melting and laser heating to melting of metal materials, followed by blowing a non oxidizing gas (AR, he, N, etc.) and beam coaxial nozzle, gas rely on the strong pressure of the molten metal is discharged, the formation of incision. Laser melting and cutting does not require the complete vaporization of the metal, the energy required for vaporization of the 1/10.
Laser melting and cutting are mainly used for the cutting of materials or active metals, such as stainless steel, titanium, aluminum and its alloys.

3.Laser oxygen cutting
The principle of laser oxygen cutting is similar to that of oxygen acetylene cutting. It uses a laser as a heat source, with oxygen and other active gas as the cutting gas. On the one hand, the injection of the gas and the cutting metal, the oxidation reaction, the release of a large number of oxidation heat; on the other hand, the molten oxide and melt blown out from the reaction zone, the formation of the incision in the metal. Because of the oxidation reaction in the cutting process produces a lot of heat, so the energy required for laser oxygen cutting is only the melting of 1/2, and the cutting speed is much larger than the laser vaporization cutting and melting cutting.
Laser oxygen cutting is mainly used for metal materials and heat treatment of carbon steel, titanium steel oxidation.

4.Laser scribing and breaking control
Laser scribing is the high energy density of laser scanning on the surface of brittle materials, the material is heated to evaporate a small groove, and then applying a certain pressure, brittle materials will be along the slot at the split. Laser laser scribing generally used for Q switch and CO2 lasers.
The control fracture is the steep temperature distribution generated by the laser engraving, which produces the local thermal stress in the brittle material, which causes the material to be broken along the small groove.

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Safe operation of laser cutting machine

Safe operation of laser cutting machine

When laser cutting machine working,the failure is dangerous.Novice must undergo professional training in order to operate independently, the following to learn the 13 details of laser cutting machine safety work. 

1.Please follow the general cutting machine safety operation rules.Please start the laser in strict accordance with the laser start procedure. 

2.The operator must be trained to be familiar with the structure and performance of the equipment, and to master the relevant knowledge of the operating system. 

3.Wear good labor protective equipment according to regulations, must wear the protective glasses in line with the provisions in the vicinity of the laser beam.

4.Pls don't working the material when be not sure if it is suitable for laser,invoide producing the harmful fumes and vapors.

5.Operator is not allowed to leave the position when the equipment is running, if need to leave, please stop or cut off the power switch. 

6.Please put fire extinguishers in your fingertips; stop processing, please turn off the laser or optical gate; do not put paper, cloth or other flammable substances in the unprotected laser beam around.

7.When the abnormal appearance in the processing process, should be immediately shut down, in a timely manner to eliminate the failure or reported to the competent personnel. 

8.Keep the laser, bed and around the site clean and orderly, no pollution, waste, according to the provisions of the workpiece, sheet piling. 

9.When using gas cylinders, should avoid crushing welding wire, so as to avoid leakage accident. The use of gas cylinders, transport should comply with the rules of gas cylinders. The ban of gas cylinders in the sun or near the heat of the sun. When the valve is opened, the operator must stand on the side of the bottle mouth. 

10.Please observe the high pressure safety rules when repare laser machine.Follow the rules and procedures for 40 hours or one week per operation, 1000 hoursor six months of maintenance. 

11.After the boot, please first manual low speed Y, X direction of the machine, check to confirm whether there is abnormal situation. 

12.The new work program input, please try to run, and check its operate situation. 

13.During the work, observe the operation of the machine, so as to avoid the cutting machine out of the effective range or two sets of collision caused the accident.

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Overcome the difficulties of laser cutting machine cutting metal pipe technology

Overcome the difficulties of laser cutting machine cutting metal pipe technology 

Accompanied by the rapid growth of the stainless steel pipe production and consumption, laser cutting tube equipment are growing rapidly in popularity, the demand of personnel and technology of laser cutting machine grown quickly.This highlights the shortage and lag in the laser cutting equipment and laser cutting Overcome the difficulties of laser cutting machine cutting metal pipe technology 

Accompanied by the rapid growth of the stainless steel pipe production and consumption, laser cutting tube equipment are growing rapidly in popularity, the demand of personnel and technology of laser cutting machine grown quickly.This highlights the shortage and lag in the laser cutting equipment and laser pipe cutting talent and technology, which is also reflected in some stainless steel enterprises, with advanced laser cutting equipment, but still exposed pipe cutting efficiency is low, poor quality management, resulting in the phenomenon of serious waste of pipe. 

Laser pipe cutting processing technology is a high production efficiency, productivity and strong technology.Can modified the design at the last minute without affecting the entire the production process.Greater benefits is that the end user can control the short version or medium version in production without making a large number of templates, so you can give more quickly respond to customer needs, so this does not need to make the molds.From the perspective of flexibility, laser cutting processing technology can be used to process any shape of the processing program, and the laser can be completed in any direction. The shape of the template can be changed quickly, without the help of any tool, providing the possibility to process a competitive personalized packaging or trademark. Accuracy is one of the advantages of digital systems. Laser processing can offset printing and finishing process in the presence of inaccurate, such as material may produce flexible deformation, the laser can be based on these deformation is adjusted, and the traditional template making is not. Laser tube cutting products processing is a very accurate and high level technology, Of course, this requires a certain cost of investment in the early stage, the following will focus on the relevant issues related to laser cutting and provide targeted solutions.  
Worker can draw,nesting,cutting with the professional pipe cutting and nesting software,generate cutting program,then full automatic laser cutting for the large length of stainless steel pipe.The speciality of tube nesting software is the basis and prerequisite for the realization of high volume, high efficiency and high quality cutting production of laser tube cutting machine. 
At present, the laser pipe cutting process, there are some quality problems, for example: led to cut some parts over burning, pipe cutting inclined plane for burning, part corner, and cutting circular parts circle deformation or cannot be closed, pipe directly lead to serious waste and cut tube production efficiency is low. CNC pipe cutting technology refers to the NC system of the cutting control software to provide advanced cutting tube technology and rich pipe cutting experience, pipe cutting workers to operate by skilled in the use of control system, to achieve high quality, high efficiency of CNC cutting. CNC laser cutting technology is a high volume, high efficiency, high quality cutting production methods, CNC cutting pipe is the core of CNC cutting system. 
Pipe cutting process due to pipe cutting (especially for tubular diameter of square tubes), slag, attached on the tube wall, most of the heat produced in the cutting is absorption of the workpiece, cutting density is large, often cause overheating pipes, corner and square tube four horns, burning, seriously affecting the ring incision quality, can't even cutting. For such problems, the following solutions can be used: 
1, increase oxygen pressure.           
2, improve the angular speed of synthesis by software.           
3, laser cutting headband height sensing with dynamic system can guarantee in the process of cutting, cutting the nozzle and the workpiece plane height remained unchanged (focus unchanged), cutting effect does not change with the surface of the workpiece affected. 
The proposed solution will improve the laser tube cutting processing equipment efficiency in the use of, so as to improve the cutting efficiency is low, poor quality management, pipe caused serious waste, improve production and processing enterprises product efficiency, for the enterprise to create a better profit. talent and technology, which is also reflected in some stainless steel enterprises, with advanced laser cutting equipment, but still exposed pipe cutting efficiency is low, poor quality management, resulting in the phenomenon of serious waste of pipe. 
Laser pipe cutting processing technology is a high production efficiency, productivity and strong technology.Can modified the design at the last minute without affecting the entire the production process.Greater benefits is that the end user can control the short version or medium version in production without making a large number of templates, so you can give more quickly respond to customer needs, so this does not need to make the molds.From the perspective of flexibility, laser cutting processing technology can be used to process any shape of the processing program, and the laser can be completed in any direction. The shape of the template can be changed quickly, without the help of any tool, providing the possibility to process a competitive personalized packaging or trademark. Accuracy is one of the advantages of digital systems. Laser processing can offset printing and finishing process in the presence of inaccurate, such as material may produce flexible deformation, the laser can be based on these deformation is adjusted, and the traditional template making is not. Laser tube cutting products processing is a very accurate and high level technology, Of course, this requires a certain cost of investment in the early stage, the following will focus on the relevant issues related to laser cutting and provide targeted solutions.  
Worker can draw,nesting,cutting with the professional pipe cutting and nesting software,generate cutting program,then full automatic laser cutting for the large length of stainless steel pipe.The speciality of tube nesting software is the basis and prerequisite for the realization of high volume, high efficiency and high quality cutting production of laser tube cutting machine. 
At present, the laser pipe cutting process, there are some quality problems, for example: led to cut some parts over burning, pipe cutting inclined plane for burning, part corner, and cutting circular parts circle deformation or cannot be closed, pipe directly lead to serious waste and cut tube production efficiency is low. CNC pipe cutting technology refers to the NC system of the cutting control software to provide advanced cutting tube technology and rich pipe cutting experience, pipe cutting workers to operate by skilled in the use of control system, to achieve high quality, high efficiency of CNC cutting. CNC laser cutting technology is a high volume, high efficiency, high quality cutting production methods, CNC cutting pipe is the core of CNC cutting system. 
Pipe cutting process due to pipe cutting (especially for tubular diameter of square tubes), slag, attached on the tube wall, most of the heat produced in the cutting is absorption of the workpiece, cutting density is large, often cause overheating pipes, corner and square tube four horns, burning, seriously affecting the ring incision quality, can't even cutting. For such problems, the following solutions can be used: 
1, increase oxygen pressure.           
2, improve the angular speed of synthesis by software.           
3, laser cutting headband height sensing with dynamic system can guarantee in the process of cutting, cutting the nozzle and the workpiece plane height remained unchanged (focus unchanged), cutting effect does not change with the surface of the workpiece affected. 
The proposed solution will improve the laser tube cutting processing equipment efficiency in the use of, so as to improve the cutting efficiency is low, poor quality management, pipe caused serious waste, improve production and processing enterprises product efficiency, for the enterprise to create a better profit.