The cutting surface of the laser cutting machine is not smooth?

The cutting surface of the laser cutting machine is not smooth?

When the laser cutting machine is processing, some conditions will occur on the cutting surface, such as incomplete cutting, rough and uneven cutting surface, slag, wavy lines or vibration marks, overburning or too large heat-affected zone, oblique stripes or uneven cutting, burrs, etc.

Once these problems occur, the operator needs to take timely solutions to avoid more workpieces being discarded and causing material waste.

What are the consequences of the rough cutting surface of the laser cutting machine?

The rough cutting surface of the laser cutting machine may bring a series of consequences, affecting the final quality and performance of the product,

including but not limited to the following points:

1. Reduced appearance quality: The rough cutting surface will directly affect the aesthetics of the product. For application areas requiring high surface finish, such as decorations, precision parts, etc., this will be a significant problem.

2. Affected structural strength: The unevenness of the cutting edge may become a stress concentration point, reducing the overall structural strength and durability of the product, especially in the key load-bearing or force-bearing parts.

3. Difficulty in subsequent processing: Rough cut surfaces may require additional grinding and polishing steps during welding, assembly or other secondary processing, which not only increases production costs but also prolongs the production cycle.

4. Damage to material properties: If the material is locally overheated due to improper parameters during the cutting process, the material microstructure may be changed, affecting its physical and chemical properties, such as hardness and corrosion resistance.

5. Decreased dimensional accuracy: Irregularities in the cut surface may cause dimensional deviations, which will affect the accuracy and efficiency of assembly for parts that require high-precision matching.

6. Increased scrap rate: Unsmooth cut surfaces may cause some products to fail to meet quality standards, thereby increasing scrap rates, reducing finished product output, and affecting economic benefits.

7. Reduced customer satisfaction: The final product does not meet customer quality expectations, which may lead to customer complaints and returns, damage corporate reputation, and may lose customer trust and market share in the long run.

Therefore, solving the problem of rough laser cut surfaces is crucial to ensuring product quality, improving production efficiency, and maintaining corporate reputation.

What's wrong with the rough cut surface of the laser cutting machine?

The rough cutting surface of the laser cutting machine may be caused by many factors. The following are some common reasons and corresponding adjustment suggestions:

1. Poor laser beam focusing: The laser beam is not correctly focused on the material, which will also lead to reduced cutting quality. It is necessary to check and adjust the focal length of the laser head to ensure that the laser is accurately focused.

2. Improper cutting parameter settings: Improper settings of parameters such as laser power, cutting speed, and focal length may lead to rough cutting surfaces. Too high or too low laser power will affect the cutting quality. Too high may cause the material to overheat, melt or burn, and too low may cause incomplete cutting. It should be adjusted to the appropriate range according to the material type and thickness.

3. Auxiliary gas problem: The auxiliary gas (such as oxygen and nitrogen) used in laser cutting is not pure enough or the flow rate is improperly set, which will affect the slag removal during the cutting process and cause the cutting surface to be rough. The gas supply system should be checked and the gas type and flow rate should be adjusted.

4. Material selection and setting do not match: Different materials have different adaptability to laser cutting and require corresponding parameter settings. If the parameters are not optimized for specific materials, poor cutting quality may result.

5. Machine software and firmware: Problems with the control software and firmware of the laser cutting machine may also cause inaccurate cutting. Check and update to the latest version to ensure that the algorithm and control signals are accurate.

6. Mechanical and optical component status: If the optical lens, cutting head or moving parts of the laser cutting machine are contaminated, worn or miscalibrated, it will directly affect the cutting quality. Regular cleaning and maintenance are necessary.

7. Working environment factors: Dust, temperature and humidity in the working environment may also affect the cutting quality. Keep the environment clean and control the appropriate temperature and humidity conditions.

What should I do if the cutting surface of the laser cutting machine is not smooth?

1. Adjust the cutting parameters to the optimal settings;

2. Ensure that the laser beam is accurately focused;

3. Use appropriate auxiliary gas and adjust its flow;

4. Optimize the cutting configuration according to the material characteristics;

5. Clean and maintain the equipment regularly;

6. Check and optimize the working environment conditions;

7. Update the software and firmware to ensure optimal performance.

By considering these factors and making corresponding adjustments, the smoothness of the laser cutting surface can be effectively improved.

What are the cutting surface problems encountered during the laser cutting process?

1. Incomplete cutting: This may be caused by insufficient laser power, too fast cutting speed, contamination of focusing mirror or reflector, damage to focusing mirror, improper focal length, deviation of laser optical path, unstable voltage, low laser current, high reflectivity of material, nozzle blockage, insufficient auxiliary gas pressure or low cooling system efficiency.

2. Wave pattern or vibration mark: The wavy texture on the cutting surface may be caused by mechanical vibration, such as external vibration caused by water tank, exhaust fan, etc., or internal mechanical vibration caused by gear slippage and improper guide rail installation.

3. Rough and uneven cutting surface: This may be caused by improper cutting parameter setting, poor laser focus, improper use of auxiliary gas, wear or contamination of mechanical parts, or working environment factors.

4. Slag: When cutting holes or narrow areas, material slag may adhere to the cutting surface due to poor heat dissipation, laser focus deviation, insufficient air pressure, improper cutting speed, etc.

5. Overburning or too large heat-affected zone: Slow cutting speed or high power may cause overheating of the material, forming an overburned area, making the cut surface black and affecting the physical properties of the material.

6. Oblique stripes or uneven cutting: Improper cutting speed, laser power or air pressure settings may cause oblique lines or uneven cutting marks on the cut surface.

7. Burrs: Excess material protrusions on the cutting edge are usually caused by cutting parameters, auxiliary gas or equipment maintenance problems.

For these problems, the laser cutting machine needs to be carefully inspected and adjusted, including optimizing cutting parameters, maintaining optical and mechanical components, ensuring stable auxiliary gas supply, and improving the working environment.

How to calculate the qualified cutting surface of the laser cutting machine?

1. Cutting surface roughness: The cutting surface should meet a certain smoothness standard. The specific value depends on the application requirements. For example, the Ra value (arithmetic mean deviation of surface roughness) needs to be within a certain range, such as Ra3.2 or less, depending on the material and purpose.

2. Verticality and slope of cutting edge: The cutting edge should be as vertical as possible to the material surface, and the slope should be small, especially for thicker plates, verticality is more critical.

3. Slag size of cutting edge: The slag generated during the cutting process should be as small as possible and easy to remove. The slag size should be within the allowable range and should not affect subsequent processing or use.

4. Cutting edge fillet size: The edge should be smooth, and the fillet radius should meet the design or process requirements, and should not be too large or too small.

5. Stripe drag: The stripes or textures formed during the cutting process should not be too deep or too long, so as not to affect the appearance or function.

6. Cutting accuracy: The deviation between the actual cutting size and the design size should be within the allowable tolerance range to ensure high-precision processing.

7. Flatness: The overall flatness of the cutting surface should meet the requirements to avoid deformation caused by the heat generated during the cutting process.

8. Degree of cutting deformation: The deformation of the material after cutting should be kept to a minimum, especially for thin plates or easily deformed materials.

In order to ensure that the cutting surface is qualified, it is usually necessary to use professional testing instruments for measurement, such as roughness testers, three-dimensional coordinate measuring machines, etc., to quantify the above indicators and compare them with standards or customer requirements. At the same time, the precise control of laser parameters (such as power, speed, focal length), auxiliary gas type and pressure, material pretreatment, etc. during the cutting process is also the key to ensuring cutting quality.