{"id":4835,"date":"2023-03-06T06:36:25","date_gmt":"2023-03-06T06:36:25","guid":{"rendered":"https:\/\/dplaser.com\/?page_id=4835"},"modified":"2025-08-11T16:35:57","modified_gmt":"2025-08-11T08:35:57","slug":"faq","status":"publish","type":"page","link":"https:\/\/dplaser.com\/fr\/faq\/","title":{"rendered":"FAQ"},"content":{"rendered":"
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Foire aux questions<\/h1>

These are some of the most frequently asked questions users have about our laser equipment. Please be sure check if your question has been answered here before submitting a support ticket. If you don\u2019t find your answer here, please leave a message below and we\u2019re happy to help anytime!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Soudage au laser<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHow to Choose a Laser Welding Machine?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

For different materials, choosing different laser power waveforms can also make the welding effect more delicate. Sometimes even materials that cannot be welded by traditional methods can be obtained by changing the laser power waveform.When selecting the laser output power waveform, under the premise of outputting the same laser energy, the wider the duty cycle, the larger the welding spot; the higher the peak output power of the laser output power waveform, the deeper the welding spot. Customers can explore in the application process to explore the laser output power waveform suitable for your products.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tWhat are the Key Parameters of Laser Welding Machine?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Puissance du laser<\/strong>
The energy delivered per unit of time by a fiber laser. The power of a laser cutting machine determines its cutting or engraving speed, as well as its ability to penetrate or heat materials. Laser power is a physical quantity that measures the output energy per unit time, and it shares the same unit of measurement as electrical power, using watts.<\/p>

Welding Speed<\/strong>
Welding speed has a significant effect on the depth of fusion. Increasing the speed reduces the depth of fusion, while too low a speed may result in excessive melting of the material and weld penetration. Therefore, there is a range of welding speeds that are appropriate for a given laser power and thickness of a given material, and the maximum depth of fusion can be achieved at the corresponding speed values therein.<\/p>

Laser Power Density<\/strong>
The prerequisite for deep penetration welding is to focus the laser beam to achieve sufficiently high power density, thus laser power density plays a decisive role in the formation of weld seams. Laser power also controls the depth of penetration and welding speed. For a certain diameter of the laser beam, increasing the laser power deepens the penetration and accelerates the welding speed.<\/p>

Peak Power<\/strong>
This is a specific term for pulsed lasers and an important performance indicator for pulse lasers. It represents the highest power that can be achieved by a single pulse. The unit is watt (W).<\/p>

Pulse Frequency<\/strong>
Pulse frequency, beam spot size, and welding speed need to be matched to achieve the desired overlap rate. Generally, a higher overlap rate leads to smoother welds, but it also reduces the welding speed. When the laser pulse frequency exceeds a certain value, the overlap rate becomes too high, surpassing the welding limit of the material, which may lead to burn-through or the formation of welding spatter.<\/p>

Largeur d'impulsion<\/strong>
Also known as pulse duration, it refers to the duration of a single pulse. Therefore, it is a unit of time measured in milliseconds (ms), microseconds (us), nanoseconds (ns), picoseconds (ps), femtoseconds (fs), etc.<\/p>

Max Pulse Energy<\/strong>
Refers to the laser energy carried by a single pulse and is the product of peak power and pulse width. The unit is joule (J). For example, if the peak power is 10 kilowatts and the pulse width is 100 nanoseconds, the pulse energy E = peak power * pulse width.<\/p>

Pulse Repetition Rate<\/strong><\/p>

Equivalent to the number of pulses repeated within one second, measured in hertz (Hz).
Average power: It is the laser energy output per unit time in one repetition cycle, unit is Watt (W). Output power = pulse repetition frequency * pulse energy.<\/p>

Defocus Amount<\/strong><\/p>

Defocus amount, also known as focus offset distance, pertains to the separation between the focal point of the laser beam and the surface intended for machining on the workpiece. Altering the defocus amount directly impacts the dimensions of the laser spot, consequently influencing the laser energy density within the irradiation region. There are two types of defocus: positive defocus and negative defocus. Positive defocus occurs when the focal plane is above the workpiece, while negative defocus occurs when it is below. With negative defocus, the power density inside the material is higher than on the surface, resulting in stronger melting and vaporization, allowing the light energy to penetrate deeper into the material. Therefore, in practical applications, negative defocus is preferred when a larger penetration depth is required, while positive defocus is suitable for welding thin materials.<\/p>

Beam Spot Size<\/strong><\/p>

The size of the beam spot is one of the most important variables in laser welding as it determines the power density.<\/p>

Focal Point Position<\/strong><\/p>

The position of the focal point is critical in order to maintain adequate power density when welding. Changes in the position of the focal point relative to the surface of the workpiece directly affect the weld width and depth.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tWhy Laser Welding Machine Widely Used in Sheet Metal Manufacturing Industry?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

In sheet metal laser manufacturing, the quality requirements for welding strength and appearance are different according to different products. Laser welding has a small heat input, and the heat-affected zone is extremely small, which can effectively improve the welding quality and reduce the time for follow-up work. And some internal structural parts or parts that need to be sprayed later have higher requirements for welding strength and welding speed. DP laser welding machine is undoubtedly the best choice.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tPuis-je personnaliser les param\u00e8tres, les pi\u00e8ces et les marques de la machine laser ?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Dapeng Laser est un fabricant sp\u00e9cialis\u00e9 dans la R&D d'\u00e9quipements laser, qui int\u00e8gre les activit\u00e9s de recherche et d\u00e9veloppement, de fabrication, de vente et de service apr\u00e8s-vente. La soci\u00e9t\u00e9 propose plus de 200 types d'\u00e9quipements laser, notamment des machines de d\u00e9coupe laser, de marquage laser, de soudage laser, de gravure laser et de nettoyage laser. DP Laser s'engage \u00e0 fournir \u00e0 ses clients des solutions de traitement laser et une assistance technique professionnelle afin de devenir un partenaire de confiance. N'h\u00e9sitez pas \u00e0 contacter notre \u00e9quipe technique en ligne pour obtenir des solutions d'\u00e9quipements laser sur mesure et des devis !<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tCan the Handheld Laser Welding Machine Work at High Temp?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Lorsque les temp\u00e9ratures sont basses en hiver, on ajoute de l'antigel dans le r\u00e9servoir d'eau afin de garantir le bon fonctionnement de la machine laser et d'assurer son entretien. Mais qu'en est-il dans les climats chauds ? Lorsqu'on travaille par temps chaud, si le r\u00e9servoir d'eau ne parvient pas \u00e0 assurer le refroidissement, l'\u00e9quipement d\u00e9clenche une alarme et suspend son fonctionnement. Comment \u00e9viter que de telles situations ne se produisent ? Le r\u00e9servoir d'eau est la cl\u00e9 : sa taille d\u00e9termine la dur\u00e9e de fonctionnement n\u00e9cessaire pour maintenir une temp\u00e9rature normale. Plus le r\u00e9servoir d'eau est petit, plus sa capacit\u00e9 \u00e0 maintenir une temp\u00e9rature constante est faible, et plus il est grand, plus cette capacit\u00e9 est \u00e9lev\u00e9e ; il existe \u00e9galement une certaine diff\u00e9rence de co\u00fbt. Afin de r\u00e9duire les co\u00fbts de production, de nombreux fabricants \u00e9quipent leurs machines de petits r\u00e9servoirs d'eau, ce qui explique les diff\u00e9rences de prix.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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D\u00e9coupe au laser<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHow Does a Fiber Laser Cutting Machine Work? <\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Fiber laser cutting machine adopts fiber laser to produce high energy density laser beam, focusing on the surface of the workpiece through the optical system, making the irradiated area of the material quickly melt or vaporize, with the high-speed movement of the cutting head to complete the precise cutting operation.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tWhat Kind of Materials Can Fiber Laser Cutting Machine Cut? <\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Fiber laser cutting machine is suitable for cutting a variety of metal materials, including stainless steel, carbon steel, aluminum, copper, titanium and other metal alloys, as well as some non-metallic materials (such as acrylic, wood, leather, etc.), but it is mainly used in the industrial metal manufacturing.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tHow Thick is the Material Cut by the Laser Cutting Machine?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

1. The current cutting capacity of laser cutting machines in the industry:
Carbon steel is 36mm. If the 36mm steel plate is made of high-quality materials, the machine performance is good, the graphics are not complicated, and the cutting quality is good. Stainless steel is 25mm. However, mild steel is less than 25mm and stainless steel is 16mm or less.
2. The maximum stroke of the laser cutting machine
There are currently two types of laser metal cutting machines: one is desktop, the general effective cutting range is 1.5 * 3 m, 2 * 4 m; the other is gantry type laser cutting machine, which effective cutting width can be 2~6 meters, and the length can be 10 meters. It has the same structure as flame cutting machine flame cutting machine and plasma cutting machine.
3. Speed and accuracy
If the main cutting board is lower than 6mm, it is recommended to purchase a desktop laser cutting machine that is faster and more accurate than the gantry type.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tCutting thickness supported by 500W Laser Cutting Machine<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

500W fiber laser cutting machine to cut stainless steel and carbon steel materials, and the thickness is generally about 3mm~6mm.Factors affecting the processing thickness and speed of fiber laser cutting machine:
1. Different materials
The stainless steel material is very hard, generally can be cut into 3mm thick, the surface is very rough and the speed is slow.
2. Related accessories of cutting machine.
3. Equipment maintenance
The laser machine needs regular maintenance, and a good working environment is benefit for the stable operation and service life of the equipment.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Marquage au laser<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tWhat is the Laser Marking Process?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Laser marking is also called laser coloration, charring, or laser dark marking, and is attained when the laser beam changes the surface of the material. A low-powered beam is required to complete this slight alteration of the surface. High contrast marks can be created through laser marking without damaging the material. When laser marking a plastic surface, it can be called “charring,” while annealing is commonly used for laser marking metals. There are four main types of laser marking.<\/p>

\u00a0<\/h3><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t<\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tLaser Marking Applications<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t

Fiber Laser Marking Machine Application<\/strong><\/p>

Primarily suitable for most metal materials such as stainless steel, aluminum alloy, copper, iron, titanium, etc. It can also be applied to certain specific non-metal materials.<\/p>

CO2 Laser Marking Machine Application<\/strong><\/p>