ETA Laser Machine 4040/6040 for home and office

ETA Laser Machine 4040/6040 for home and office 

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.

Copy from JINAN XIAOJIA CNC MACHINERY EQUIPMENT CO.,LTD
www.xjrouter.com

Effect of laser output power on laser cutting

Effect of laser output power on laser cutting 
When using laser cutting machine,the laser output power is a parameter that has a direct relation with the melting ability of the processed. For getting good effect of cutting,we need increase the output power in order to improve the processing ability.

Improve processing capacity:
1, improve the laser cutting speed.          
2, increase the thickness of the processing plate.          
3, processing of aluminum, copper and other high reflection spectral reflectance factor.          
4, zoom lens from the short focal length lens.          
5, the focus of the location from the surface of the processed material changes.

We can determine whether the use of the processing conditions of the output energy is appropriate, according to the processing of the cutting surface and machining in the case of the spark. When the output power is much larger than the standard value, the thermal effect of the incision increases, and the melting loss occurs at the corner. And cut the noodles to become thick, from the upper to the lower part of the vertical.
If the output power value is far less than the standard value, the lower part of the cut is significantly thicker, become the state of digging into. And with the increase of the amount of adhesion of slag, it is difficult to remove. Mars is lagging in the cutting process in the opposite direction in the cutting process.
Suitable for the processing of the output conditions exist within a certain range, the thinner the thickness of the processing board, the wider the range of output conditions. Output processing in proper conditions, the cutting surface streak fine, lower relative to the speed of light slow.

copy from www.xjrouter.com

Fiber laser cutting machine is not a panacea, pls don't cut these materials with it

Fiber laser cutting machine is not a panacea, pls don't cut these materials with it
 

Many people believe that the fiber laser cutting machine belongs to the cutting machine category, and adopt imported laser, cutting range should be very wide, the effect should be much better than the other way, actually otherwise, cutting machine also are in special types, each cutting machine has his advantages and disadvantages.The following are analyzed in detail.

First, fiber laser cutting machine belongs to metal laser cutting machine processing category, so only for cutting metal, which cannot be cut fabrics, leather, stone etc. nonmetal, the reason is very simple, fiber laser cutting machine in the wavelength range not within the absorption range, or ceiling are not suitable, amounting to less than the desired effect of cutting, at present,
application in non metal cutting edge is not very obvious, of course does not preclude later with development needs in this regard.

Secondly, we don't recomend fiber laser cutting machine cut aluminum, copper and this type materials in long-term,because these materials belong to high reflective material (Note: high reflective sheet with the cutting surface smooth degree of concern is not big, mainly due to the wavelength of the laser not in these materials ideal absorption range, absorption effect is not good, most of the energy is reflected back, easy to damage protection lens in front of the laser head), the cutting effect is not good in long-term working . It will also increase the usage of consumables;

Finally,with the different power of fiber generotor,the cutting thickness is also different.The more power,the cutting thickness is more.And cutting thin metal,the speed is faster.Fiber laser cutting machine is very obvious for thin sheet cutting edge.

Copy from www.xjrouter.com

What auxiliary gas can be used laser cutting?

What auxiliary gas can be used laser cutting?

Laser cutting machine can use the auxiliary gas when cutting, mainly oxygen, nitrogen, air and argon, and the following we will introduce its use and characteristics for different auxiliary gases.

1.Atmosphere

Air can be supplied directly from the air compressor, so the price is very cheap compared with other gases. Although the air contains about 20% of the oxygen, but the cutting efficiency is far less than oxygen, cutting capacity and nitrogen. The cutting surface will appear micro film, but it can be used as a measure to prevent the film from falling off. Cut end face yellow.
The material is mainly applicable to aluminum, aluminum alloy, stainless steel, brass, galvanized steel, non metal and so on.

2.Nitrogen

Some times,when we cut some metal material,the cutting surface will form oxide film,adopt nitrogen can invoide the oxide film.The non oxidation cutting mask has the characteristics of direct welding, coating, corrosion resistance and so on. Cut face is white.
The main application of the plate are stainless steel, galvanized steel, brass, aluminum, aluminum alloy, etc.

3.Oxygen

Mainly used for cutting carbon steel in laser cutting machine. Using oxygen reaction heat large format improve cutting efficiency at the same time, resulting in the oxide film can improve the reflective material beam spectrum absorption factor. Cut face is black or dark yellow.
Is mainly used for rolling steel, solution and connecting structure of rolled steel, mechanical structure with carbon steel, high tension version, tools in, stainless steel, galvanized steel, copper and copper alloys.

4.Argon

Argon is inert gas, used in the laser cutting machine to prevent oxidation and nitriding, also used in welding, compared with other processing gas, the price of Japonica rice, the corresponding increase in cost. Cut face is white.

From www.xjrouter.com

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