Analysis of black smoke 1, It is hard for the entire industry to achieve the goal that laser welding doesn’t produce a little bit of black smoke completely nowadays. Because of black smoke,   laser welding and laser cutting are the same, and a smoking device is requested in the laser cutting machine. 2, When compared with laser welding and traditional gas metal arc welding, argon arc welding has its unique advantages. From the perspective of black smoke, gas metal arc welding is more serious than laser welding. Because the speed of argon arc welding is slow, it will generate black smoke but not very obvious visually. What’s more, because laser welding’s arc is small, we see the black smoke is clearer. Due to the laser welding machine is a new technology product that has just been come out in the past two years, everyone has higher expectations for the laser, which is very normal psychologically. 3, There are two kinds of black smoke for laser welding currently. One is large enough to have a black accumulation on the workpiece, and the other is that there will be black smoke in the air which we cannot let the more obvious black smoke accumulation currently, but there will still be in the air. 4, We have several tests on how to reduce black smoke in the air. We also communicated with some peers according to our test situation. The factors of generating black smoke A. Black smoke generated in welding has a lot to do with the materials of welding. Different welding materials’ black smoke size is different. We have done aluminum alloy welding before. Find that different aluminum alloy welding materials generate black smoke that their sizes are very different. B. If there is an oil film protection or oxide layer on the surface of the workpiece, then the welding black smoke will be larger. C. Black smoke and welding wire are related. The current welding wire is the traditional welding wire, and there is no welding wire specifically for the laser industry, which leads to laser industry is not easy to control. It is recommended to use the existing smokeless welding wire. D. Black smoke generated in welding and welding process are related, such as it also is related with welding speed and techniques. For example, welding aluminum at low power may have less black smoke than high power welding. E. The damage of the lens will be poor in welding usually.

This article applies the 3-in-1 cleaning mode 1. Switch cleaning program:Through the toggle button in the upper right corner of the home page, you can switch the program ,break and restart. 2. Replace the suitable focusing mirror: You can directly use the focusing lens of the welded F150 (cleaning width is 20mm) or replace the cleaning F400 focusing lens (cleaning width is 40mm-60mm), which can make choices according to the lens used in the corresponding selection in the setting. 3. Remove the locking part in front of the gun head ①Cleaning process Scanning frequency: the swing speed of the motor, whose range is 10-100Hz. It is recommended to set 80. Scanning width: The scanning width of the spot that its range is 0-40mm, and it should be selected in the system settings according to the specifications of the focusing mirror actually used. Peak power: we usually regard it as the maximum power of the laser. Duty Cycle: Default data is 100% Pulse frequency: Default data is 2000 After setting the parameters, if you import and go back, you can see this process on the left side of the home page ②Confirmation of focus Through the scanning of the distance back and forth as well as near and far, the focus is when the sound is the largest and the spark is the largest, and the cleaning should be carried out according to this distance. In this time the energy is the strongest. Depending on the difference of the use of focusing, the following is a reference F150 focus (generally the distance from the tip to the plate is about 10-15 cm or so) F400 focus (generally the distance from the tip to the plate is about 35-40 cm or so when the energy is strongest) ③The use of gases Gas selection for cleaning: air not less than 5 kg, oil-free and water-free should be filtered or other inert gases be used when above three levels When cleaning, be sure to keep the distance from the tip to the plate stable and the hand speed even

I. The use of copper nozzles The classification of copper nozzles is mainly distinguished: whether to feed wire, the size of the welding wire, the welding angle, as shown in the figure above, for an example, the inner corner wire feeding welding 1.0 welding wire uses AS-12 cooper nozzle. II. Selection of welding wire Depending on the differences of the welding plate, we need to use different welding wires (gas-protected solid cored welding wires) Stainless steel = stainless steel welding wiree.g. ER304 Carbon steel / galvanized sheet = iron wire Aluminum = aluminum wire(As for aluminum welding wires, we recommend using more than 5 series of series of alloy aluminum. Because its hardness is high and not easy to get stuck.) III. Gas selection ①There are two kinds of easily seen nitrogen or argon. As for welded stainless steel, we recommend using nitrogen because that welding effect is better. But be sure do not use mixed gas or nitrogen dioxide gas. ②Air pressure requirements: the flow meter is not less than 15, and the pressure gauge is not less than 3 IV. focus Usually, 0 joule welding is used (0 of the scale tube does not mean that the focus is 0, which is affected by the laser. So we’d better be subject to the actual situation) Note: The positive focal length is the position where the laser flame is the largest and the sound is the clearest General process control of continuous penetration welding: if you can see slight discoloration traces on the back at a single point, then you can achieve better penetration welding during continuous welding; if you see obvious traces on the back, you can even feel it If it has been penetrated, then it will spatter during continuous welding, and even a deep pit will appear. Specifically, the focal length, energy and waveform should be adjusted according to the actual sample. The thinner the material, the smaller the required spot, otherwise there will be welding through.

Samples Welding Test Service Please send samples to the following Address Company name:HEFEI PES LASER TECHNOLOGY CO.,LTD Address:Building 2,Lian Hai Yun Chuang Gang,Hefei,Anhui,China Postal Code:231200 Tel:0086-551-67160778 /0086-18856420577 Notice:please send email(info@peslaser.com) to PES LASER before send samples.