3 focus of laser cutting machine

3 focus of laser cutting machine

1.Cutting focus is above the material

This way we are also known as the negative focal length, because the cutting point is not located in the surface of the cutting material is not located in the inside of the cutting material, but positioned at the top of the cutting material. This method is mainly used in the material with high cutting thickness. This approach is focused on the cutting material, mainly because of the need to cut a large plate, otherwise the nozzle delivery of oxygen is extremely prone to lead to problems and the resulting cut temperature. But one drawback of this approach is that the cutting surface is rough and less practical for the cutting of high precision.

2.Cutting focus is in material

This way is also known as the positive focal length. When you need to cut the workpiece for the stainless steel or aluminum plate when the cutting point in the workpiece inside the model. But one drawback of this approach is that, due to the focus principle of cutting surface, the cutting surface of the workpiece is larger than the cutting point at the same time, and this mode requires the cutting gas flow to be large, the temperature should be sufficient, and the time of cutting is slightly longer. So when you choose the material of the workpiece is mainly for stainless steel or aluminum lamp of the material selection of high hardness.

3.Cutting focus is on surface of material

This method is also known as the 0 focal length, usually in the SPC, SPH, SS41 and other parts of the cutting, the use of the cutting machine is used to focus on the workpiece surface, which is not the same as the upper and lower surface of the workpiece surface smooth, generally close to the focus of the cutting surface is relatively smooth, and far from the cutting of the lower surface is rough. This model should be based on the actual application of the upper and lower surface of the process requirements and set.

To sum up, we should use different focus mode when cutting different material or parts, can more play the performance advantages of laser cutting machine.

Advantages of laser cutting machine in the shipping industry

Advantages of laser cutting machine in the shipping industry

There are four main types of ship hull plate parts, which are flame cutting, plasma cutting, cutting and laser cutting.
1.Equipment performance comparison
The cutting performance of the flame cutting machine can be carried out by the cutting machine. The plasma cutting machine is fast and the cutting machine has high efficiency, but it can only be limited to the machining of the linear side parts. But the cutting plate speed is relatively slow. It is due to the advantages of high precision, laser cutting machine in high sheet product construction, block construction process without allowance precision management, build merchant ships of welding groove line of demanding process: such as FCB puzzle, double wire submerged 4 arc automatic welding and other aspects, has irreplaceable advantages, the laser cutting machine is to change the smooth implementation of the method has laid an important foundation.

The comparison of the parameters of the laser cutting machine and the other two kinds of cutting equipment is listed:
Application of laser cutting machine in the actual production of shipping industry
Through comparison of the performance of laser cutting equipment and other equipment, the main advantages of the laser cutting equipment are cutting high precision and small thermal deformation. This feature has a broad application prospect in the practical production.
There is no allowance for advancing the process of building a new high tech ship
High precision requirements for ship hull zhuanpei high frame, zhuanpei gap must be controlled in the range of 1mm. In a bottom part EB02 for example, formerly in the plasma of floor plate material, in order to ensure the assembly gap, in the coal floor are set to mow the margin (as shown in the following picture), the allowance of the ribbed plates are is in the field assembly manual to mow, mow the quality parameter difference not neat inner slotted oxides are not clear and easy to, but also increase the workload of the assembly, assembly cycle of growth, resulting in the block construction period is prolonged. Using laser cutting machine to improve the accuracy of parts, in the relative to cancel the assembly margin, the structure of the assembly speed is significantly accelerated. The assembly quality of the whole block is improved obviously, and the precision of the construction is also improved at the same time. The fact proves that the more accurate parts are good for the main dimensions of the segmented.
Promote the change of thin plate cutting
Section thin-walled superstructure construction division is an important part of the whole high engineering hull construction, the thinnest thickness coaming of only 2mm; in the superstructure segment in the process of the construction, expect from the next parts manufacturing, block manufacturing, total group equipped with a series of processes are in the hands of the process, thin wall plate is very easy to lose stability deformation. So section thin-walled superstructure construction of each process are key control, and it is the introduction of laser cutting machine, promote the thin-walled material engineering change. To ensure the quality of the construction of the sub construction.
Before the introduction of laser cutting machine, the cutting of the 2-3mm cutting of the sheet is mainly through the manual line. Through Zhaping were leveling; artificial marking and shear cumulative error in 3mm, resulting in in wall imposition assembly of ultra poor gap, unable to realize the assembly gap in the range of 1 mm requirements, tend to have a lot of modification cutting phenomenon; and for 4 6mm steel plate, using ion cutting, because of the thin sheet metal, the cutting heat, steel plate edge straightness is not up to the requirements, after cutting Zhaping, still need the edge planing machine for edge processing, an increase of machining process.
To the Ministry of loading stage, there are a large number of wall due to the material error or scrap or rework, and in the sub wall assembly, the wall edge potential repair or assembly gap is endless, and the material is not used in the cutting machine before the material scrap rate is high. Introduction of laser cutting machine thick, it is using its high processing precision, small heat input, all thin wall are used laser cutting and blanking, step in place, eliminating the need for the lineation, Zhaping, planing process; to eliminate the problems caused by plate's loss, greatly improve the processing efficiency.
It is clear that the use of laser cutting machine for thin plate cutting is a process of change. Greatly improve the efficiency and quality of the thin wall segment processing.
In short, laser cutting machine as a new type of hull parts cutting equipment, compared with other conventional cutting equipment, with high machining accuracy, small thermal deformation, good stability, low loss rate, small environmental pollution and other advantages, in the shipbuilding industry has great potential for application. Currently in in section of high ship building without remainder, sheet cutting method change has good application, greatly improving the processing efficiency, eliminating the on-site repair cut phenomenon, reduce the labor and material waste. The advantage of laser cutting machine will be wider and deeper application in ship manufacturing.

Copy from http://www.xjrouter.com/news/laser%20cutting%20machine%2021.html

Teach you how to easily distinguish the quality of laser cutting machine

Teach you how to easily distinguish the quality of laser cutting machine

1.Roughness

Laser cutting section will form the vertical lines, the depth of the lines determines the cutting surface roughness, the more shallow the lines be, the more smooth cut section be.Roughness not only affects the appearance of the edge, but also affects the friction characteristics, in most cases, we need to minimize the roughness, so the more shallow, the higher the quality of cutting.

2.Verticality

If the sheet metal thickness is more than 10mm, the verticality of cutting edge is very important. Away from the focus, the laser beam becomes divergent, based on the focus of the position, cutting toward the top or bottom of the width. When the cutting edge deviates from the vertical line of a few millimeters, if the edge is more vertical, the cutting quality is better.

3.Cutting width

Generally cutting width does not affect the cutting quality, cutting width is important only cutting special precision contour in internal parts of components, Because the cutting width determines the minimum of the outline, When the thickness of the plate increases, the cutting width increases. So if you want to ensure that the same high accuracy, regardless of the width of the cut, the workpiece in the laser cutting machine processing area should be constant.

4.Lines

When the high speed cutting plate, the molten metal will not appear in the vertical laser beam below the cut, but will be in the laser beam to spray out. As a result, the curved lines are formed in the cutting edge, and the lines follow the moving laser beam closely. In order to fix this problem, the feed rate can be cut down at the end of cutting.

5.Burr

Burr formation is a very important factor to determine the quality of laser cutting. Because the removal of burr is an additional workload, so the amount of the amount of burr is very serious and the quality of the cutting can be judged visually.

6.Material deposition

The special liquid of a layer of oil on the surface of the workpiece prior to the melting of the perforation. Laser gasification process, the upward or downward discharge will be formed on the surface of the deposition.

7.Sag and corrosion

Depression and corrosion have a negative effect on the surface of the cutting edge. They appear in general this should be avoided in the cutting error.

8.Heat affected zone

In laser cutting, the area near the notch is heated. At the same time, the structure of the material changes. For example, some of the material will harden. Heat affected zone refers to the depth of the region of the internal structure change, the smaller the better.

9.Deformation

If the cutting causes the parts to be heated rapidly, it will deform. This is particularly important in the fine processing, because the contour and the connecting piece is usually only a few millimeters wide. Controlling the laser power and the use of short laser pulses can reduce the heat of the part and avoid the deformation.

Of course, just look at the effect of cutting materials nor each material are suitable, such as you get very poor material, The effect of cutting for each machine is not good, as another example, you take some not suitable for laser cutting of materials may not be able to conclude. We recommend that the materials are: acrylic, organic glass, ABS and other materials

copy from http://www.xjrouter.com/news/laser%20cutting%20machine%2020.html

Maintenance of laser machine

Maintenance of laser machine

Laser machine must be maintained in order to use a more permanent.

1.Replacement of water and clean water tank

Suggestion: wash the laser tank and replace the circulating water once per week
Note: Before open the machine must ensure that the laser tube is filled with circulating water.
The water quality and the water temperature of the circulating water directly affect the service life of the laser tube, it is recommended to use pure water, and the water temperature is controlled at 35 degrees Celsius. For more than 35 degrees Celsius to replace the circulating water, or add ice to water to reduce the water temperature, (recommend that the user choose a water chiller, or use two water tanks).
The tank cleaning: first turn off the power supply, the water inlet pipe is pulled out, so that the laser tube water automatically flows into the water tank, water tank is opened, remove the water pump, clear water pump on the dirt. The cleaning tank clean, replacing the good water circulation, water return tank will connect to pump water pipe is inserted into the water inlet, the joint order. The pump is powered by a single pass and run for 2-3 minutes (the laser tube is filled with circulating water).

2.Fan cleaning

Use the wind turbine for a while, the wind machine inside accumulate a lot of solid dust.The fan produces a lot of noise, but also not conducive to the exhaust and odor. When appear fan inadequate suction exhaust is not smooth, please turn off the power, wind turbine air inlet pipe and an air outlet pipe, remove dust inside, and then inverted fan and pulling the wind leaf relief until clean, and then install the fan.

3.Lens cleaning

There are three mirrors and a focusing mirror (No. 1 mirror is located in the laser tube's launch exit, which is the upper left corner of the machine.
No. 2 is located in the left end of the beam reflector,
No.3 mirror is at the top of the fixed part of the laser head, poly focal lens in the lens barrel is arranged at the lower part of the laser head can be adjusted).
The laser is reflected through the lens, focusing from the laser hair shot out.
Lenses are easily stained with dust or other contaminants, resulting in the loss of laser or lens damage, No. 1 and No. 2 lens cleaning should not be removed, only to be dipped in a clean liquid of the mirror carefully along the central edge of the lens to the edge of the rub.
Note: 1. The lens should be gently wipe, do not damage the surface coating; 2. Clean the process should be handled with care, to prevent the fall; 3. Focusing mirror installation please be sure to keep concave downward.
The 3 lens and the focusing mirror is removed from the frame, use the same method to wipe, wipe after it is put into the can.

4.Cleaning of guide rail

Guide, linear axis, as one of the core components of the device, its function is to guide and support. In order to ensure that the laser machine has higher accuracy, it is required that the guide rail, straight line has a high accuracy and good motion stability. In the process of operation, because of the large amount of corrosive dust and smoke, the smoke and dust in the process of processing will produce a lot of dust and smoke.The smoke and dust be in a long time, a large number of deposits in the rail, linear axis surface, the machining accuracy of the device has a great impact, and will be in the guide line of the formation of pitting, shorten the service life of the equipment.

Copy from http://www.xjrouter.com/news/Maintenance%20of%20laser%20machine.html

Notes of laser machine cutting different materials

Notes of laser machine cutting different materials

With the development of laser cutting technology, the field of laser cutting is becoming more and more widely used. However, different materials have different characteristics, so when using laser cutting machine, we need to pay attention to the matter.

Structural steel

The material will be cutted in good results with oxygen. When cutting with oxygen, the cutting edge is slightly oxidized. For the thickness of 4mm, we can use nitrogen for high pressure cutting. In this case, the cutting edge is not oxidized. When cutting more than 10mm thickness sheet, the laser using special plate and in processing to the workpiece surface oiling can get better effect. 

Stainless steel

Cutting stainless steel need use oxygen, in the case of the edge of the oxidation is not related. Using nitrogen in order to get no oxidation without burr edge, you do not need to treat the edage again. In the sheet metal surface coating film will get better perforation effect, but not reduce the processing quality.

Aluminum

In spite of high reflectivity and thermal conductivity, the thickness of 6mm can be cut, which depends on the type of the alloy and the ability of the laser.

When cut with oxygen, the cutting surface is rough and hard.

With nitrogen, the cutting surface is smooth.

Pure aluminum because of its high purity is very difficult to cut, only in the system to install a reflective absorption device to cut aluminum. Otherwise the reflection would destroy the optical components.

Titanium

When cut titanium plate,we should use argon and nitrogen. Other parameters can refer to nickel chromium steel.

Copper and brass

The two materials have high reflectivity and very good thermal conductivity. Below the thickness of 1mm brass can be cut with nitrogen; the thickness of the following 2mm copper can be cut, processing gas must use oxygen. Only when the system is fitted with a "reflection absorption" device can be cut copper and brass. Otherwise the reflection would destroy the optical components.

Synthetic material

Cutting synthetic materials to keep in mind the danger of cutting and the possible discharge of hazardous substances. Synthetic materials can be processed are: thermoplastic, heat hardening material and artificial rubber.

Organic compound

There is a danger of fire in all organic matter (using nitrogen as the working gas, and compressed air as the working gas). Wood, leather, cardboard and paper can be cut by laser, cutting edge will be burnt (brown)

From Jinan Xiaojia CNC Machinery Equipment Co.,Ltd

http://www.xjrouter.com/news/laser%20cutting%20machine.html

Application industry of CNC Router

Application industry of CNC Router

1.Advertising and gift production:

 

For all kinds of sculpture double color plate, organic glass, finetech stone doorplate, three-dimensional signs, decorative gift, box double color man statue, relief medal, block wall lamp house, light guide plate carving lamp house, organic board relief door.

 

2.Mold industry:

Engraving button relief mold printing, stamping die, injection mold, blow mold, stamping die,eyes mold.

3.Tobacco industry:

Used for packing cigarette anti-counterfeit mark, template and cigarette making wheel.

 

4.Printed circuit board (PCB) product development in the circuit, drilling, milling, etc.

 

5.Automotive industry: tire mold and accessories mold processing.

 

6.The printing industry: watermark mould and making coins mould.

 

7.Packing: Production of carton packaging bags stamping, plastic matrix mold.

 

8.Model making industry: making sand model, building model etc.

 

9.Seal industry: all kinds of fonts of various types of material seal engraving

 

10.Used in furniture industry, furniture decoration industry, woodworking decoration industry, musical instrument industry, wooden handicraft industry, furniture decoration industry, this machine is suitable for large area plate plane carving, wood furniture carving, wood carving, wood carving, wood carving, wood carving, wood carving, kitchen window door carving. Is the product of furniture decoration industry.

 

How to choose the suitable tools for CNC Router when working different material?

How to choose the suitable tools for CNC Router when working different material?

Copy from www.xjrouter.com

Jinan Xiaojia CNC Machinery Equipment Co.,Ltd

As is known to all, we need to choose different cutting tools according to different materials, when using CNC Router.So which type tools suit what material?
There are a lot of people do not know much about it, here we summarize it simply , I hope they are helpful to you.

1.MDF material
We recommend the double long chip spiral milling cutter tool, it has two high-capacity flutes.Double-edged design, making it a good chip removal function, and achieve a good tool balancing.In the processing of MDF, the material is not black, do not smoke, tools can work with long life.

2.Metal
We recommend to use single edged, double edged straight slot flat bottomed cutter tool.

3.High MDF and Solid wood
You can use edge milling cutter tool.

4.Cork, MDF, native wood, PVC, acrylic
Deep relief working, can use single edged helical ball end milling cutter tool.

5.Metal Model
We recomend the tungsten steel milling cutter, plated purple black hard ti.

6.Rough machining particle board
Multi stripe milling cutter tool is suitable.

7.Cutting mirror surface Acrylic
Diamond engraving tool is better

8.Precision engraving on plastic material
Round bottom tool is good choice.

What factors restrict laser cutting machine？

What factors restrict laser cutting machine？

Copy from Jinan Xiaojia CNC Machinery Equipment Co.,Ltd
www.xjrouter.com

The application of laser cutting machine highlights the advantages of his performance in various industries , but at the same time in the laser cutting machine industry also has some non fixed factors to restrict his development, according to the research findings in recent years, the development of laser cutting machine in the development stage, which is not in conformity with the current rapid development of science and technology.
With the continuous improvement of fiber laser cutting technology, the performance of fiber laser cutting machine is becoming more and more outstanding. High photoelectric conversion efficiency and low cost of maintenance and maintenance costs, by now many enterprises of the favor, but also makes the fiber laser cutting into the industry is currently one of the most valuable technology.
Laser beam focusing is very small, which has a very strong energy, and it is applied to the cutting of many characteristics. But in recent years, the development of laser cutting machine can be said to have some stagnation, this is mainly because there are some key technologies can not make a breakthrough progress, let us introduce what factors restrict the development of laser cutting machine.

One, laser light energy convert into a surprising heat to keep in a very small area, can provide
(1) narrow sided slot;
(2) the minimum heat affected zone of the adjacent cutting edge;

Two, the laser beam does not exert any force on the workpiece, it is non-contact cutting tool, which means that
(1) no mechanical deformation of the workpiece;
(2) no tool wear, no conversion tool;
(3) cutting material without consideration of its hardness, that is, laser cutting ability is not affected by the hardness of the material being cut, any material can be cut.
(3) minimal local deformation.

Three, the laser beam is controllable and has high adaptability and flexibility.
(1) it is convenient to combine with the automation equipment to realize the automation of cutting process;
(2) because there are no restrictions on cutting the workpiece, the laser beam has infinite profile cutting ability;
(3) combining with computer, automatic typesetting, saving material.

Laser cutting machine is applied in many fields, such as electronic industry, automobile industry, hardware industry, shipping industry, precision instrument industry, etc..
In the specific operation, because of the characteristics of the product itself, we need to debug the parameters of the equipment to get the best effect, and some factors will affect the whole cutting effect.

From the above we can see that there are many factors that affect the quality of fiber laser cutting equipment, so we need to debug the best balance point when we cut the specific products. Sometimes if the control is not properly, it is possible to cut the accuracy and quality of a great difference, how fast, accurate, effective control of these factors is very important.

Laser cutting machine or numerical control punch, the five big difference tell you which is the most suitable for you?

Laser cutting machine or numerical control punch, the five big difference tell you which is the most suitable for you?

Copy from www.xjrouter.com
Jinan Xiaojia CNC Machinery Equipment Co.,Ltd

Today, with the requirements of the market to the rapid replacement of product requirements, the flexibility of the processing equipment to put forward higher requirements. And the application of laser cutting machine, bring the new vitality of the processing industry. Compared with the traditional CNC punch, laser cutting machine has the advantages of 3C, 3S: cool, clean, calm, sure,savety,saving, but in the whole process on the market, laser cutting machine and CNC punching bed have equal shares,  why? Then the following small series of knowledge, so that we understand the laser cutting machine and CNC punch.

First, processing materials

Laser cutting machine can cut metal materials (including black metal, non-ferrous metals, such as carbon steel, stainless steel, silicon steel, galvanized sheet, aluminum alloy,...) , non metal materials (acrylic, plastic, wood, cloth, leather, carpets and other materials). Carbon steel with a thickness of 20mm.
Numerical control punch can only be made of metal materials, the thickness is generally not more than 6mm.
Second, processing flexibility

From the perspective of flexibility, laser cutting machine has advantages, can cut any shape, size of holes, and punch can only cut a few specifications of the hole (32 position of the turret is large), in case of large size hole, the use of small die stamping process, efficiency is low, mold wear seriously.In order to meet the needs of different products processing, CNC punch must be purchased a lot of molds (different sizes, the same size but for different thickness of the material), further, it is necessary to prepare a warehouse for the storage, and increase the demand for mold management. In addition, numerical control punch on the flatness of the plate, the surface cleanliness requirements higher.

Third, accuracy, roughness

Laser cutting machine belongs to non-contact processing, no stress, no deformation, positioning accuracy of 0.03mm, the workpiece accuracy is 0.1mm, the cutting section is smooth and smooth, the machining accuracy of the numerical control punch is slightly worse.

Forth, efficiency, cost

The original use of a factory press + cutting machine, cutting plate machine after the need to transfer to the punch, compared with laser cutting machine, need more manual.
Comprehensive comparison of the laser cutting machine (3kW fiber laser) and the cost of the punch: power, supplies (laser cutting machine material is the focus lens, ceramic body, nozzle, mirror, gas, etc., the material is a mold, etc.), artificial, equipment depreciation, the result is that the laser cutting machine costs RMB179 yuan / hour, punch RMB174 yuan / hour.
In view of the factory products(Metal, thickness 1.5 ~ 3mm) for processing efficiency estimation, the result is that the use of laser cutting machine is only 0.2 hours, and the use of 0.7 hours.
Obviously, laser cutting machine has obvious advantages in efficiency and cost.
Of course, if the product is large, the use of special design of the mold (such as the porous mold, but this will damage the flexibility), it can improve the efficiency of the numerical control punch, until the laser cutting machine.

Fifth, function, limitation
Laser cutting machine and CNC punch press have their own limitations. If need to achieve blinds, stretching, sink hole, hole flanging, strengthen tendons, stamping process, it is only used CNC punch press; and for saw blade with silencing seams, only the laser cutting machine can perform.

Maintenance of laser cutting and carving machine

Maintenance of laser cutting and carving machine 

Jinan Xiaojia CNC Machinery Equipment Co.,Ltd

1.Linear guide: lubricating oil

The use of a period of time after the laser engraving machine, engraving and cutting smoke.
Dust has a corrosive effect on the rail, so regular maintenance guide. ?Power off the laser cutting and carving machine,clean the rails with a clean soft colth.Then drop the oil on the rails,make the slider on the rail rolling back and forth, to ensure that the lubricating oil into the slide block.Then roll the slider on the guide rail, and then put the rail on the rail.Please note that when the guide is not fixed, mounted on a fixed pin, maintain level, and then fixed with the slider and the slider, and then the lens, adjust the optical path of X axis.

2.Wipe focus lens and mirror

After using the laser cutting machine a period of time,dust will be attached on surface of focus lens and mirror.It influces the effection and accuracy of laser working.Almost one week,we should clean the focus lens and mirror.(According to the use frequency of laser cutting machine)
Clean the focus lens and three mirrores with dry alcohol, professional cleaning mirror paper (or clean soft cloth).

3.Add oil on bearing

There are a large quantity of bearing in laser cutting machine.In order to ensure good cutting and carving effect,we should add oil on some bearing regularly (except oil bearing).Wipe the surface of bearing with a clean soft cloth,then such up the oil with needle tube and add oil on bearing,at the same time,rotating bearing slowly.

4.Synchronous belt elastic adjustment

There are some synchronous belts in laser cutting machine.If the synchronous belt is too slack,the effect of engraving small letter will be heavy shadow.If the synchronous belt is too tight,it is easy to hurt.So we need check the belt after using some time for make sure the effect of working and reduce the noise of working.

5.Maintenance of laser tube

Laser tube is a very important part of laser cutting machine,now we talk about how to maintenance laser tube.As we know,when we use laser tube,we must use water cooling.After long time,there will be some white scale.We can add little vinegar or weak acid solution in circulating water.This way will clean the white scale,then export the dirty water with clean water.Pls note,when clean the laser tube,keep it no laser.

Laser cutting machine parts- nozzle, the most detailed introduction

Laser cutting machine parts- nozzle, the most detailed introduction

Jinan Xiaojia CNC Machinery Equipment Co.,Ltd

Nozzle is used for spraying gas assisted to a cutting area, in laser cutting machine generally use coaxial (airflow and the optical axis coaxial nozzle, belonging to laser cutting machine parts of, not to belittle the so small a nozzle, in fact, there are about it the universe and get bad will influence the cutting quality.

1. Shape of nozzle

The common shape of the nozzle, as shown in the picture, you can see the shape of the spray hole has a lot of kinds, cylindrical, conical, and scaling.

2.Nozzle hole requirements

The nozzle hole size must be allowed to pass through the beam and avoid contact with the nozzle wall. Obviously, the smaller the diameter of the nozzle, the more difficult the beam alignment. In addition, the auxiliary air flow from the nozzle must be coupled with the removal of the fusion product and the enhanced cutting action. The hole wall of the nozzle hole should be smooth. To ensure the smooth flow of air, to avoid the disorder and affect the quality of the cut.

3.The distance between the nozzle and the material surface

The coupling of the nozzle flow and the workpiece is a gas dynamics problem, the air flow pattern and the spacing between the nozzle and the workpiece are important variables. If in the laser cutting machine, nozzle from the workpiece surface too close, will produce the lens of strong back pressure, influence of sputtering cutting production by the ability to disperse; but the jet from the workpiece surface too far, resulting in unnecessary loss of kinetic energy. The distance between the workpiece and the nozzle is generally controlled by 1~2mm. The cutting of the shaped workpiece is mainly by the automatic adjustment height device, such as the contact, the back pressure and the inductance and the capacitance change and so on.

4.Size of nozzle

The size of the nozzle is affected by the size of the laser cutting machine, the size of the thermal reaction zone and the cutting quality of the cutting width. As the nozzle diameter increases, the heat affected zone is narrow, the main reason is that the air flow from the nozzle to the cutting area matrix material produced a strong cooling effect. The nozzle diameter is too large to cause the cutting seam is too wide, and the nozzle is too small will cause the calibration difficulties, to induce the beam is small nozzle cut. The common nozzle diameter is 1~1.5mm.