The golden autumn has arrived, and the weather is gradually getting cooler. Recently, the country has begun to cool down on a large scale, and the temperature in some areas is below zero. Water below zero will condense into ice, and the density of ice is less than that of water, which may cause the water cooler, laser, and cutting head water pipeline to rupture or deform due to volume expansion, resulting in major damage to related core components. This reminds our customers to do a good job in preventing freezing of laser cutting machines and laser welding machines. 1. The water temperature setting of the chiller should be set with the change of the ambient temperature. The water temperature setting range in winter is 22°C-25°C, and the water temperature setting range in summer is 27°C-30°C. Appropriate water temperature setting can reduce the alarm and save the humidity and temperature of the laser. Use electricity while avoiding condensation on the laser and laser cutting head. 2. When the ambient temperature is lower than 0 °C, the liquid water will condense to form a solid, and during the condensation process, the volume will become larger. In this way, the pipes and components (including chillers, lasers and laser cutting heads) in the water-cooling system will be "cracked", or the pipes in the water-cooling system will be blocked, so that the cooling water cannot be circulated, and the equipment cannot be used normally. The antifreeze protection measures for equipment used in winter are as follows: 1. If there will never be a power outage in the local area, the chiller will not be turned off when the equipment is out of use. 2. If the equipment must be powered off or the water cooler will not be used for a long time (such as the Spring Festival holiday), all the cooling circulating water should be drained (including the water tank of the chiller, water pipes, lasers, and cooling water inside the cutting head). When there is a small amount of cooling circulating water that cannot be exhausted, it is necessary to pass low-pressure air (air pressure should not be greater than 0.4MPa) to drain all remaining water to prevent freezing, or add antifreeze according to the requirements of Article 3. 3. When the use environment is often powered off and does not have the conditions to drain the cooling water every day, professional brand antifreeze must be used. When adding antifreeze, it is necessary to empty the cooling water in all pipes and components in the cold water system, and then mix the antifreeze and cooling water in a certain proportion and pour them into the chiller (remember not to inject separately). For different brands of antifreeze and water freezing point, please consult professional manufacturers. The following table is an example of the freezing point of Clariant antifreeze water. If the ambient temperature is lower than this range, please consult a professional manufacturer to confirm the antifreeze ratio. Temp Antifreeze ratio...

The most advanced welding technology in the world today is laser welding. The laser welding machine uses high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation diffuses into the interior of the material through heat conduction, and the material is melted to form a specific molten pool. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts, and can realize spot welding, stitch welding, sealing welding, etc., with high aspect ratio, small weld width, small heat affected zone and fast welding speed. , beautiful, no need or simple treatment after welding, small focusing spot, high positioning accuracy, easy to achieve automation. The traditional welding machine technology uses the characteristics of high temperature during welding, and then the welding effect is not good due to the poor temperature and time control. However, since the laser welding machine was launched, its welding effect has been loved by everyone, and More and more companies use laser welding machines for processing and manufacturing. What materials can laser welding machine weld?   1. Die steel Laser welding machine can be applied to S136, SKD-11, NAK80, 8407, 718, 738, H13, P20, W302, 2344 and other types of die steel welding, and the welding effect is good. 2. Carbon steel Carbon steel is welded by laser welding machine, and the effect is good. The quality of welding depends on the content of impurities. In order to obtain good weld quality, preheating is required for carbon content above 0.25%. When steels with different carbon content are welded to each other, the welding torch can be slightly biased to the side of the low carbon material to ensure the quality of the joint. Because the heating speed and cooling speed of the laser welding machine are very fast, so when welding carbon steel. Weld crack and notch susceptibility also increases with increasing carbon content. Both medium and high carbon steels and common alloy steels can be laser welded well, but preheating and post-weld treatment are required to relieve stress and avoid cracks. 3. Alloy steel Laser welding of low-alloy high-strength steels, as long as the selected welding parameters are appropriate, can obtain joints with mechanical properties equivalent to those of the base metal. 4. Stainless steel In general, stainless steel welding is easier to obtain high-quality joints than conventional welding. Due to the high welding speed and small heat-affected zone of laser welding, the overheating phenomenon and the adverse effect of the large linear expansion coefficient during welding of stainless steel are alleviated, and the welding seam has no defects such as pores and inclusions. Compared with carbon steel, stainless steel is easier to obtain deep penetration narrow welds due to its low thermal conductivity, high energy absorption rate and melting efficiency. Welding thin plates with low-power laser welding ca...

For thin plate cutting, the use of laser cutting opportunities is better than traditional cutting methods. What are the advantages in terms of processing conditions? The processing of the fiber laser cutting machine belongs to non-contact processing, which solves the defects such as deformation caused by the mechanical pressure on the workpiece caused by traditional metal processing, and there are no worn instruments and workpieces. It is a cut with a good coating and finish. Low processing cost. Fiber laser cutting machines are faster than other cutting equipment, and the cost of use is cheaper than traditional equipment. Fiber lasers can also reduce the use of mirrors, greatly reducing production and maintenance costs.  Laser is the use of material excitation to produce light, this light has a strong temperature. When contacting the material, it can quickly melt on the surface of the material to form a punch, and form a cut according to the movement of the alignment and point. Therefore, compared with the traditional cutting method, such a cutting method has a smaller gap, can save most of the materials, and is environmentally friendly. The fiber cutting machine has less waste, low noise, clean and pollution-free, which greatly improves the working environment.  The highly flexible, manual fiber laser cutting machine can save a lot of money in production costs. On the other hand, the metal laser cutting machine can cut all kinds of complex graphics, just input the drawings into the console, the machine will automatically process the required graphics, saving resources. Since laser cutting has a high dressing capacity and needs to adapt to changes in production capacity, the processing of the workpiece does not require further processing (polishing, deburring, polishing, etc.), from the production point of view, saving labor costs and processing costs, Greatly improved production efficiency.

Laser cleaning is a technology increasingly used for a variety of applications, including welding pre- and post-treatments, coating removal, and decontamination.   Laser cleaning is based on laser ablation - the process of removing material mainly from a solid surface by irradiating it with a laser beam. Every material is composed of different molecular bonds that determine a specific ablation threshold—that is, the energy required to overcome the binding energy of the contaminant layer and decompose it. To remove the contaminant layer, the energy from the laser must be above the ablation threshold of the particular material; in general terms, as the ablation threshold increases, so does the energy required to remove the contaminant. For efficient laser cleaning, the ablation threshold of the material to be cleaned should be consistently higher than that of the material to be removed.   The types of lasers used for ablation vary according to the contaminant, the composition of the underlying material, the treatment required, and the surface area that needs to be cleaned. For example, near-infrared pulsed lasers of a few tens of watts (or more) are used often because they are more efficient in reaching the ablation threshold than continuous-wave lasers. At the same time, especially short pulses have the further advantage of not heating up the surface to be cleaned.   Environmental and safety issues always accompany laser ablation, as lasers vaporize materials into fumes. In the case of an oxidized metal surface, for example, the oxide particles detach from the surface and create a highly compressed plasma (ionized gas out of equilibrium), which expands and creates a shock wave that then fragments and ejects the layer of pollutant into the atmosphere. For this reason, a fume extraction system is always needed near a laser cleaning system.   Despite these issues, numerous  companies are developing laser cleaning technologies. More and more users are willing to commit to an initial investment to profit from the advantages of this technology for surface cleaning.   Duman has developed a basic version of the laser cleaning machine, which solves most of the cleaning problems. If you only basically clean rust, paint or plastic, then this machine can fully meet your requirements.