Fiber Laser Cutting Machine

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Sheet Metal Laser Cutting: Training Tutorial & Fundaments

1. What is sheet metal laser cutting machine?

1. Definition of sheet metal laser cutting machine

(1) It is mainly used for cutting the plate into the required shape workpiece.

(2) The equipment that uses the thermal energy of the laser beam to realize cutting is to melt and evaporate the workpiece when the laser beam is irradiated on the surface of the workpiece, so as to achieve the purpose of cutting and engraving.

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 1

It has the characteristics of high precision, fast cutting, not limited to the cutting pattern, automatic typesetting, saving materials, smooth cutting and low processing cost.

It will gradually improve or replace the traditional cutting equipment.

2. Main components of sheet metal laser cutting machine

(1) Laser

 Lasers can be divided into:

  • CO2 laser
  • Nd: YAG laser
  • Semiconductor laser
  • Disk laser
  • Fiber laser
Sheet Metal Laser Cutting: Training Tutorial & Fundaments 2

Because the laser produced by fiber laser is not only easy to control, but also has good directivity, monochromatic and coherence, it is widely used in mechanical manufacturing and sheet metal processing.

(2) Main machine

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 3

According to the relative movement of the cutting head and the workbench, it can be divided into the following two types:

(1) During the cutting process, only the beam (cutting head) moves and the table does not move.

(2) During the cutting process, only the workbench moves while the beam (cutting head) is fixed.

(3) Cooling system (water cooling)

(4) Air supply system

  • Air source: bottled gas (oxygen, ammonia), compressed air (air compressor, filter, dryer)
  • Piping

(5) Power supply

  • Three phase voltage stability ± 5%
  • Power imbalance 2.5% (highest voltage in three phases – lowest voltage in three phases / average voltage of three phases)

1: Air cutting requirements

1: High performance screw compressor is selected.

2: Working pressure of compressor: 12MP.

3: Air compressor.

Air exhaust volume of compressor: 2.0 (m3 / min)

2: Dryer.

1: High performance refrigerated air dryer is selected.

2: Processing capacity of dryer: 2.0 (m3/min)

3: Inlet pressure of dryer: 1.2MP

3: Filter

1: High performance multi-stage precision filter

2: The filtering level is divided into 4 levels. QPSC level

3: Self configurable filter accuracy:

  • 0.3um 1pc
  • 0.01um 1pc
  • 0.001um 2pcs

(6) Control system

Light guide focusing system

According to the performance requirements of the workpiece to be processed, the beam is amplified, shaped and focused to act on the processing part.

The device from the laser output window to the workpiece to be processed is called the light guide focusing system.

Laser processing system (Cypcut laser cutting system)

The laser processing system mainly includes the machine bed, the workbench that can move within the three-dimensional coordinate range and the electromechanical control system.

With the development of electronic technology, many laser processing systems have used computers to control the movement of the worktable and realize the continuous work of laser processing.

Main technical parameters of CF3015 sheet metal cutting machine:

(1) Cutting area: 3005mmx1505mm;

(2) Z-axis stroke: 110mm;

(3) Machine tool accuracy, according to VDL / DGQ3441: ±0.1mm/m;

(4) Repeatability: ± 0.05mm;

(5) Maximum axial acceleration: 2000mm / S2.

(6) Maximum cutting speed: 20m / min;

(7) Machine weight: About 3.5T;

(8) Color standard: NCS S 0585-Y80R; NCS S 7020-R60;

(09) maximum bearing capacity of workbench: 250kg (3000X1500X6mm);

Machine tool accuracy VDL / DGQ3441 measuring length 1m.

Cutting accuracy is related to sheet thickness, sheet tension and tensile force.

2. Laser cutting method

Laser cutting can be divided into laser metal cutting, laser flame cutting and laser vaporization cutting.

Laser cutting method
Sheet Metal Laser Cutting: Training Tutorial & Fundaments 4

2.1 Laser melting cutting

In laser melting cutting, after the workpiece is locally melted, the melted material is ejected by the air flow.

Because the transfer of material only occurs in its liquid state, this process is called laser melting cutting.

The laser beam combined with the high-purity inert cutting gas promotes the molten material to leave the slit, while the gas itself does not participate in the cutting.

The maximum cutting speed increases with the increase of laser power, and decreases almost inversely with the increase of plate thickness and material melting temperature.

When the laser power is constant, the limiting factor is the air pressure at the slit and the thermal conductivity of the material.

Laser melt cutting can obtain oxidation-free cuts for iron materials and titanium metals.

2.2 Laser flame cutting

The difference between laser flame cutting and laser melting cutting is that oxygen is used as the cutting gas.

By means of the interaction between oxygen and the heated metal, a chemical reaction is generated to further heat the material.

Due to this effect, for structural steel with the same thickness, the cutting rate obtained by this method is higher than that by melting cutting.

On the other hand, this method may have worse notch quality than melt cutting.

In fact, it will produce wider slit, obvious roughness, increased heat affected zone and worse edge quality.

Laser flame cutting is not good at machining precision models and sharp corners (there is a risk of burning sharp corners).

A pulse mode laser can be used to limit the thermal effect.

The laser power used determines the cutting speed.

See also:

When the laser power is constant, the limiting factor is the supply of oxygen and the thermal conductivity of the material.

2.3 Laser gasification cutting

Laser gasification cutting

In the process of laser gasification cutting, the material gasifies at the slit, which requires very high laser power.

In order to prevent the material vapor from condensing on the slit wall, the thickness of the material must not exceed the diameter of the laser beam.

This process is thus only suitable for applications where the exclusion of molten material must be avoided.

In fact, this processing is only used in very small application fields of iron-based alloys.

When the plate thickness is constant, the maximum cutting speed is inversely proportional to the gasification temperature of the material.

The required laser power density is greater than 108W/cm2 and depends on the material, cutting depth and beam focus position.

When the thickness of the plate is constant, assuming that there is enough laser power, the maximum cutting speed is limited by the gas jet speed.

Laser cutting technology

Several key technologies of laser cutting are integrated technologies of light, machine and electricity.

The parameters of laser beam, the performance and accuracy of machine and numerical control system directly affect the efficiency and quality of cutting.

Focus position control technology: one of the advantages of laser cutting is the high energy density of the beam.

Now the focal length (120-200mm) is widely used in the industrial application of fiber laser cutting.

Laser perforation technology: any thermal cutting technology, except for a few cases where it can start from the edge of the plate, generally requires a small hole on the plate.

There are two basic methods for laser cutting machine: blasting and progressive drilling.

Nozzle design and air flow control technology: at present, the nozzle for laser cutting adopts a simple structure, i.e. a conical hole with a small circular hole at the end, which is usually designed by experiment and error.

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 5
Various common concentric nozzles

Process analysis of laser cutting

Laser cutting is a process combining melting and vaporization.

There are many factors that affect its cutting quality.

See also:

9 Factors Affecting Laser Cutting Quality

In addition to hardware factors such as machine tools and processing materials, other software factors also have a great impact on its processing quality.

According to the problems in actual cutting and the characteristics of laser cutting itself, it is the basic content of computer-aided process design to study the influence of these software factors on the processing quality, including the following points:

① Selection of punching point: determine the position of punching point according to the actual situation;

② Setting of auxiliary cutting path;

③ Laser beam radius compensation and empty stroke processing;

④ Save materials and improve the utilization rate of the plate as much as possible by optimizing the layout of the plate;

⑤ Combined with the path selection of the parts set;

⑥ The path after considering the influence of processing factors such as thermal deformation.

3. Laser cutting process

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 6

Laser cutting process “refers to the interaction between laser beam, cutting gas and workpiece.

3.1 Laser cutting process

The area where this process occurs is before cutting.

The laser acting before the cutting must heat the workpiece to the temperature required to melt and vaporize the material.

The cutting plane consists of an almost vertical plane which is heated and melted by the absorbed laser radiation.

In laser flame cutting, the melting zone is further heated by the oxygen flow entering the slit to reach a temperature close to the boiling point.

The resulting gasification removes the material.

At the same time, the liquefied material is discharged from the lower part of the workpiece by means of processing gas.

In laser melting cutting, the liquefied material is discharged with the gas, which also protects the slit from oxidation.

The continuous melting zone gradually slides along the cutting direction.

Thereby obtaining a continuous slit.

Many important activities of the laser cutting process occur in this area.

The analysis of these activities can obtain important information of laser cutting.

In this way, the cutting speed can be calculated and the formation of the traction line characteristics can be explained.

3.2 Material characteristics

The result of cutting activities on the workpiece may be a clean cut or, conversely, a rough or burnt edge.

The most important factors affecting cutting quality are:

1. Alloy composition

The alloy composition affects the strength, specific gravity, weldability, oxidation resistance and acidity of the material to a certain extent.

Some important elements in ferroalloy materials are carbon, chromium, nickel, magnesium and zinc.

The higher the carbon content, the more difficult the material is to cut (the critical value is considered to be 0.8%).

The following types of carbon steel have good effect of laser cutting: Q235, SW22 (low silicon low carbon aluminum killed steel).

2. Microstructure of materials

In general, the finer the particles of the constituent material, the better the quality of the cutting edge.

3. Surface quality and surface roughness

If there are rusty areas or oxide layers on the surface, the cut profile will be irregular and many damage points will appear.

If you want to cut the corrugated plate, select the maximum thickness cutting parameter.

4. Surface treatment

The most commonly used surface treatments are galvanizing, focusing galvanizing, painting, anodizing or covering layered plastic film.

The sheet treated with zinc is prone to slag hanging on the edge.

For painted plates, the cutting quality depends on the composition of the coated product.

How to process paint materials:

The first pass selects a set of parameters with low power (engraving) for pre burning and marking the treated surface.

The second pass selects a set of parameters for material cutting.

The plate with layered material coating is very suitable for laser cutting.

In order to make the capacitive detection work without fault, and make the layered coating get the best adhesion (avoid the generation of bubbles), the layered edge must always be on the upper part of the cutting workpiece.

5. Beam reflection

How the light beam is reflected on the workpiece surface depends on the basic material, surface roughness and treatment.

See also:

Some aluminum alloys, copper and brass have the characteristics of high reflectivity.

These materials are not allowed to be cut by fiber laser cutting machine.

See also:

6. Thermal conductivity

When welding with low thermal conductivity, materials with low thermal conductivity require less power than materials with high thermal conductivity.

For example, for chromium nickel alloy steel, the power required is less than that of structural steel, and the heat generated by processing is less absorbed.

On the other hand, materials such as copper, aluminum and brass lose most of the heat generated by absorbing laser light.

Since heat is conducted away from the target point of the beam, the material in the heat affected zone is more difficult to melt.

7. Heat affected zone

Laser flame cutting and laser melting cutting will lead to material variation in the edge area of the cutting material.

Quenching in the heat affected zone is reduced when processing low carbon steel or oxygen free steel.

For high carbon steel (60 #), the edge area becomes hard.

  • Melting point
  • Hot melt
  • Gasification temperature

3.3 Processability of different materials

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 7

Structural steel

When the material is cut with oxygen, better results will be obtained.

Continuous mode laser is used.

When cutting, the very small curve control system changes the feed rate, it adjusts the laser power to the shaft feed rate.

When oxygen is used as the processing gas, the cutting edge will be slightly oxidized.

For plates with thickness less than 3mm, ammonia gas can be used as the processing gas for high-pressure cutting.

In this case, the cutting edge will not be oxidized.

Complex contours and small holes (diameter less than material thickness) should be cut in pulse mode, so as to avoid cutting off sharp corners.

The higher the carbon content, the easier the cutting edge is quenched, and the easier the corner is burnt.

Plates with high alloy content are more difficult to cut than those with low alloy content.

The oxidized or sandblasted surface will get worse cutting quality.

The residual heat on the plate surface has a negative effect on the cutting result.

In order to eliminate the tension, only the secondary treated steel plate is cut.

The impure components in molten steel under boiling conditions actually have a great influence on the cutting results.

In order to cut structural steel with clean surface, the following tips must be followed:

  • S ≤ 0.04%: preferred, laser processing is good;
  • Si < 0.25%: in some cases, slightly inferior incision will be obtained;
  • Si > 0.25%: it is not suitable for laser cutting, and worse or inconsistent results may be obtained.

Stainless steel

Cutting stainless steel requires:

Oxygen is used when the edge oxidation does not matter.

Nitrogen is used to obtain the edges without oxidation and burr, and no further treatment is required.

With the possible high laser power and high-pressure nitrogen, the cutting speed may be equivalent or higher than that with oxygen.

In order to cut stainless steel with nitrogen without burrs, it is necessary to adjust the focus position.

Reset the focus position and reduce the speed, you may get a clean cut, of course, small burrs cannot be avoided.

For stainless steel, select:

Oxygen cutting: for thick plates above 3mm, reduce the feed speed and adopt progressive mode for perforation.

Laser cutting method

1. Continuous cutting is also called CW (continuous wave) cutting method.

The continuous cutting method is a method of cutting by continuously generating an oscillation output.

When cutting low carbon steel, it is the method with the highest cutting speed.

2. The pulse cutting method is a method of cutting by intermittently generating the oscillation output.

The pulse cutting method can process with good cutting quality and dimensional accuracy by reducing the heat of the input material to the minimum.

When performing pulse cutting, set the pulse frequency.

The so-called pulse frequency refers to turning the laser beam on and off several times within one second, expressed in Hz.

3. To put it simply, the advantage of continuous cutting is speed, but the cutting quality is not very good.

The continuous heat input to the material to be cut becomes excessive heat input, which affects the cutting quality and dimensional accuracy) while the pulse cutting has good cutting quality, but the speed is slower than the continuous cutting.

For example, with a 500W laser generator, the CW cutting speed of 6mm low carbon steel is 800mm / min, but the pulse is only 600mm / min.

The thinner the plate, the greater the gap.

Generally, if the thickness of steel plate exceeds 3mm, CW cutting is not applicable).

The operation of selecting the cutting mode is generally selected when making a program, or it can be selected by changing the parameters of the machine on the machine.

3.4 Gas parameters

laser cutting gas

Gas parameters include:

  • Gas type;
  • Pressure;
  • Nozzle diameter and geometry.

Air pressure and nozzle geometry determine the edge roughness and burr generation.

Processing gas consumption depends on nozzle diameter and air pressure.

Cutting air pressure below 1.0mp is low pressure and 1.5mp is high pressure.

The commonly used cutting nozzle is a cone-shaped circular mouth.

It is necessary to keep the distance between the nozzle and the workpiece surface as small as possible.

The smaller the distance, the higher the gas quality that effectively impacts the slit wall.

A spacing between 0.5 and 1.5 is often used.

4. Laser processing

4.1 Laser perforation

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 8

The parameter value of perforation is different from that of cutting.

Continuous mode perforation

  • Advantages: rapid perforation.
  • Disadvantage: perforation pit is generated.

Pulse mode perforation

  • Advantages: small through holes.
  • Disadvantages: time consuming

Note: the plate thickness (mm) approximately corresponds to the perforation time (s).

4.2 Lead and overcut

CW mode is commonly used for perforation.

This type of piercing is faster, but it produces a larger hole than piercing with a pulse.

For this reason, the position of the cut-out hole is usually selected outside the contour.

The cut length between the perforation and the actual contour is called the lead portion.

The possible change of the focus of the low light beam between the end of the starting cutting part and the contour can be identified by the unevenness of the notch edge on the workpiece.

The user must set the lead part on the ideal extension line on one side of the geometric unit as much as possible.

In the case of small surface inner contours, it is important to let the heat generated during the piercing process dissipate before the cutting begins.

Avoid setting the perforations in a narrow area and set them at a large angle with respect to the contour, which is conducive to heat dissipation.

The lead length depends on the thickness of the plate and the diameter of the hole

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 9

4.3 Corner processing

Machining of obtuse angle with radius

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 10

Where possible, avoid throwing angle without radius.

The corner with radius has the following advantages compared with the corner without radius:

  • The dynamic performance of shaft movement is better;
  • Reduction of heat affected zone;
  • Burrs are less generated.

Optimal rounding radius:

R optimal = plate thickness (mm) divided by 10, but not less than 1mm;

When no radius corner is required on the inner plate, the maximum radius is:

R edge = half the width of the incision.

With this beam, a radius free corner can still be generated, and now the axis moves dynamically:

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 11

For high-speed cutting on thin plates, it is recommended to use the hole technology.

This solution has the following advantages:

  • The shaft changes through the sharp angle in a fixed direction;
  • The workpiece itself is cut at a constant speed;
  • The thermal influence at the corner is reduced.
Sheet Metal Laser Cutting: Training Tutorial & Fundaments 12

Assess laser cutting incisions

Structural steel: cut with O2

Defect

Possible causes:

Terms of settlement

No burr, consistent traction line

No burr, consistent traction line

Proper power

Proper feed rate

The traction line at the bottom has a large offset, and the notch at the bottom is wider.

The traction line at the bottom has a large offset, and the notch at the bottom is wider.

Feed rate too high

Laser power too low

The air pressure is too low

Focus too high

Reduce feed rate

Increase laser power

Increase air pressure

Lower focus

The burr on the bottom surface is similar to the slag, in the form of droplets and easy to remove.

The burr on the bottom surface is similar to the slag, in the form of droplets and easy to remove.

Feed rate too high·

The air pressure is too low

Focus too high

Reduce feed rate

Increase air pressure

Lower focus

The metal burrs connected together can be removed as a whole.

The metal burrs connected together can be removed as a whole.

The focus is too high.

Lower the focus.

Metal burrs on the bottom surface are difficult to remove

Metal burrs on the bottom surface are difficult to remove

Feed rate too high

The air pressure is too low

Impure gas

The focus is too high.

Reduce feed rate

Increase air pressure

Use purer gas

Lower focus

There are burrs on one side only

There are burrs on one side only

Incorrect mouth alignment.

Defective nozzle mouth

Centering nozzle

Change nozzle

Structural steel: cut with O2

Defect

Possible causes:

Exclude

Material discharged from above

Material discharged from above

Power too low, feed rate too high

In this case, press the pause button immediately to prevent the slag from splashing onto the focusing lens.

And then increase the power;

Reduce the feed rate.

Inclined surface cutting, good on both sides, bad on both sides.

Inclined surface cutting, good on both sides, bad on both sides.

Improper, incorrect or defective polarization mirror;

 the polarization mirror is installed at the position of deflection mirror

Check polarizing mirror;

Check deflection mirror.

Blue plasma, workpiece not cut through

Blue plasma, workpiece not cut through

Process gas error (N2);

The feed rate is too high; Power too low

In this case, press the pause button immediately to prevent the slag from splashing onto the focusing lens;

Using oxygen as a processing gas; Reduce the feed rate; Increase power

Inaccurate cutting surface

Inaccurate cutting surface

The air pressure is too high; The nozzle is damaged; The nozzle diameter is too large; The material is not good.

Reduce the air pressure;

Replace the nozzle;

Install appropriate nozzles;

Use a material with a smooth and uniform surface.

There is no burr and the traction line is inclined;

The incision becomes narrower at the bottom.

There is no burr and the traction line is inclined

Feed rate too high

Reduce the feed rate.

Crater generation

Crater generation

The air pressure is too high; The feed rate is too low; The focus is too high; There is rust on the plate surface; The processed workpiece is overheated; The material is not pure.

Reduce the air pressure;

Increase the feed rate;

Lowering the focus;

Use better quality materials.

Very rough cut surface

Very rough cut surface

The focus is too high;

The air pressure is too high;

The feed rate is too low; The material is too hot.

Lowering the focus;

Reduce the air pressure;

Increase the feed rate;

Cooling material.

Stainless steel: cut with N2 high pressure

Defect

Possible causes:

Terms of settlement

Producing fine regular burrs in the form of drops;

Producing fine regular burrs in the form of drops;

The focus is too low; The feed rate is too high.

Raise the focus; Reduce the feed rate.

Irregular filamentous burrs grow on both sides, and the surface of large plates changes color.

Irregular burr growing only on one side of the cutting edge

The feed rate is too low; The focus is too high; The air pressure is too low; The material is too hot.

Increase the feed rate; Lowering the focus; Increase the air pressure; Cooling material.

Irregular burr growing only on one side of the cutting edge

Cutting edge yellowing

The nozzle is not centered; The focus is too high; The air pressure is too low and the speed is too low.

Centering nozzle; Lowering the focus; Increase the air pressure; Increase speed.

Cutting edge yellowing

The atmosphere contains oxygen impurities.

Use nitrogen with good quality.

Plasma is generated on a straight section.

Plasma is generated on a straight section.

The feed rate is too high.

If this happens, press temporarily.

Generating plasma on the straight-line surface

The feed rate is too high;

The power is too low;

The focus is too low.

In this case, press the pause button immediately to prevent the slag from splashing onto the focusing lens;

Reduce the pick-up speed;

Increase power;

Raise the focus.

Beam dispersion

The feed rate is too high; The power is too low;

The focus is too low.

Reduce the feed rate; Increase power;

Raise the focus.

Generate plasma at the corner

The angle tolerance is too high;

Modulation is too high; The acceleration is too high.

Reduce the angle tolerance;

Reduce modulation or acceleration.

The beam diverges at the beginning

The acceleration is too high;

The focus is too low; Molten material failed to be discharged

Reduce acceleration;

Raise the focus and pierce the circular hole.

Rough incision

The nozzle is damaged; The lens is dirty.

Replace the nozzle;

Clean the lens if necessary.

Material discharged from above

Material discharged from above

Power too low

Excessive feed rate

The air pressure is too high

In this case, press the pause button immediately to prevent molten tears from splashing onto the focusing lens

Increase power and decrease feed rate

Reduce air pressure

5. Sheet metal laser cutting precautions

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 13

In order to achieve the best processing quality, please follow the following instructions:

  • Precision adjustment machine tool;
  • Maintain according to the maintenance plan;
  • Processing according to the above requirements;
  • The surface of the workpiece shall be free of rust or scale (pickled or smooth)
  • Parameters match with material and plate specifications;
  • Preset interrelated parameters.

When a reduction in machining quality is noted, check the following factors:

  • Parameters;
  • Machining head;
  • Beam path;
  • Laser;

Do not modify the standard parameters set when purchasing the laser cutting machine;

See also:

Create a new directory for the optimized parameters;

If the processing quality deteriorates, check whether the standard parameters on the machine have been substantially changed compared with the optimized parameters.

The surface quality of materials will seriously affect the quality of laser cutting.

The raw materials must be protected against rust and dirt.

In case of rust, dirty paint on the surface and uneven surface, the material can be cut on the laser cutting machine after treatment.

The operator can obtain the best cutting quality by following the following principles:

  • Standard cutting parameters are used according to the material thickness and material.
  • When the cutting quality decreases, the standard cutting parameters are used for adjustment.
  • The main parameters to be adjusted are laser power, gas pressure, focus position and cutting speed.
  • The operator should not rewrite the standard parameter files, but should establish his own parameter files and parameter file directory to constantly summarize experience.

Continuous mode perforation is usually used, which is faster but larger than pulse perforation.

If the cutting workpiece and the remaining material are to be used, pulse piercing can be performed on the graphic contour.

The working mode of low light level includes continuous mode and pulse mode.

Continuous mode is applied to normal cutting;

Pulse mode is used to process small holes and perforations smaller than the thickness of the material.

Heat dissipation before cutting and after piercing is very important when cutting small materials.

Avoid connecting the cutting line with the narrow part of the workpiece, and have enough included angle with the figure to facilitate heat dissipation.

The maximum cutting size of the laser cutting machine is 3000 * 1500mm.

The maximum cutting capacity of 500W fiber laser cutting machine is 6mm for carbon steel; Stainless steel 4mm.

See also:

Sheet Metal Laser Cutting: Training Tutorial & Fundaments 14

The diameter of the smallest hole to be cut shall be greater than the plate thickness.

Safety operation regulations for laser cutting machine

1. Observe the safety operation regulations of general cutting machine.

Start the laser in strict accordance with the laser startup procedure.

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

3. Wear labor protection articles as required.

See also:

4. Do not process a material before it is clear whether it can be irradiated or heated by laser, so as to avoid the potential danger of smoke and steam.

5. When the equipment is started, the operator shall not leave the post or entrust someone to take care of it. If it is really necessary to leave, the operator shall stop the machine or cut off the power switch.

6. Put the fire extinguisher at a place where it is easily accessible; Turn off the laser or shutter when not processing; Do not place paper, cloth or other inflammables near the unprotected laser beam;

7. In case of any abnormality during processing, the machine shall be shut down immediately to eliminate the fault or report to the competent personnel;

8. Keep the laser, the bed and the surrounding site clean, orderly and free of oil pollution. The workpieces, plates and wastes shall be stacked as required.

9. When using gas cylinders, avoid crushing the welding wires to avoid leakage accidents.

The use and transportation of gas cylinders shall comply with the gas cylinder supervision regulations;

It is prohibited to expose the gas cylinder in the sun or near the heat source.

When opening the bottle valve, the operator must stand on the side of the bottle mouth.

10. High voltage safety regulations shall be observed during maintenance.

Every 40 hours of operation or weekly maintenance, every 1000 hours of operation or every six months of maintenance shall be carried out according to the regulations and procedures.

See also:

11. After startup, manually start the machine tool in X and Y directions at low speed, and check whether there is any abnormality.

12. After the new workpiece program is input, it shall be put into trial operation first and its operation shall be checked.

13. During operation, pay attention to the operation of the machine tool to avoid accidents caused by the cutting machine out of the effective travel range or collision.

Conclusion

Through the above training content, I think you have a deeper understanding of sheet metal laser cutting, which will certainly be helpful to you.

If you still have other questions about sheet metal laser cutting, please leave a message in the comment area.

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