Laser welding ! You must learn ! To keep up with the changes and not to fall behind

Laser welding! You must learn! To keep up with the changes and not to fall behind. Hello, everyone. One of the reasons why weak humans dominate the Earth may be that they are best adapted to changing times. Even a powerful creature could become extinct or a spectacle to the zoo if it fails to adapt to the changing times. Don't worry too much about it because I'm talking about it from somewhere. Just as all industries change, so does welding. You've probably seen something like this before. It's laser welding. Laser welding is often used for precise welding because it has good heat concentration capability. Welding is possible with fast working speed and low heat input, so bending by welding heat is also small. Other than that, there are many advantages, but I think there are many people who do not know about laser welding because it is not yet well known. So today, I visited NSWEL to show you something about laser welding. If you haven't experienced laser welding, you may find it difficult, but it's not as difficult as you might think. This is a type of welding that even beginners can easily do. Laser welding is used in a wide variety of fields, but the most popular place is probably a company with a lot of thin stainless steel sheet work. Like I showed you, it's possible to do "Butt welding. "Fillet welding" is also possible. This is a 1.2mm thick stainless steel sheet. Do you know why it is used a lot for thin-stainless steel welding? The operation speed is very fast. Accordingly, the heat input is very low. As the heat input is low, the thermal deformation by welding heat is also small. The damage to the product is also small because the work process becomes shorter. So it is often used for metal work that needs to be kept clean. This is a metal material called "Gold Stain Miller". It is a material widely used to make signboards, ornaments, metal furniture, and structures ect. As you can see, it's a very clean material, so you have to handle it carefully. CO2 welding, MIG welding, arc welding, etc. are difficult to apply to these tasks because spatter occurs. There are many places where TIG welding is used. However, if there are traces of welding, the quality of the product will deteriorate, so many people are probably worried. For this reason, laser welders are often used to weld shiny materials such as "gold stains" and mirrors. And then the iron plate... Steel plates are also well welded. Welding works well even though the surface is not cleaned with a grinder. It is also used to make structures using thin steel plates. Next is "GALVA". It's a zinc-painted steel plate. You all know that welding is tricky. It's a really difficult material to weld. The surface must be ground clean with a grinder in order to TIG weld the zinc-painted steel plate. CO2 welding also causes a lot of defects due to zinc content. So it is recommended to clean the surface of the steel plate before working. Those of you who have handled zinc-plated iron sheets are probably well aware of it. The work process has been drastically reduced. Welded parts are not bad either. The smoke and fume caused by the burning of zinc seems to have decreased. However, smoke and fume are harmful to your health, so please wear a mask and work. And one more thing... Aluminum can also be welded. It is not easy to weld this thin aluminum. You can also pull welding. Push welding is also possible. When welding aluminum, it is recommended to remove the oxide film from the surface before welding. However, if you weld aluminum with a laser welder, you don't have to go through that process. And aluminum heats up quickly because it has very fast thermal conductivity. As a result, thermal deformation by welding heat is also increased. Thermal deformation is often a problem. Sometimes techniques are needed to reduce such thermal deformation. Laser welding may be a way to reduce such concerns. As I showed you, laser welding is very advantageous for thin sheet welding. Then, can we work on the thick steel plate? Of course it's possible. This is a model called NSL-2000FCW. 2000W capacity model. It is said that penetration is possible up to 5mm. This is a stainless steel plate with a thickness of 4mm. Let's change the welding time and do a TACK. It was welded for a very short time. I'll show you the back. If you look here, it's welded to the back. Although the welding time was relatively short, it penetrated a stainless steel plate with a thickness of 4 mm. If the welding time is longer, the penetration depth is deeper and deeper. Let me show you one more time. We only increased the welding time a little bit, but it penetrated the 4mm stainless steel plate. We didn't do beveling, and there was no gap between the plates. But it penetrated the 4mm steel plate. It also means that penetration is very good. I'll show you something very interesting at the end of the video with this steel plate. Before that, let me show you how to set up the laser welder. There are many functions, but I'll show you a few. This is a function to control laser power. It can be adjusted from 10% to 100%. And since laser welding uses argon gas, it also has "previous gas" and "post gas" controls. There's a function called "Wobble Frequency" underneath it. It's a little similar to pulse welding. There is a function called "Wobble Diameter" underneath it. You can understand it as a function to control the bead width. Very narrow precise welding is also possible. "Wobble diameter" can be adjusted to 5mm. I'll show you what it's like in a little while. There is a function called "Wobble Type" underneath it. There are many shapes. If you choose the shape, you can understand that the laser is welding while weaving. I'll show you what this is like. I'll show you the "Wobble Diameter" first. I set the "Wobble Diameter" to 1mm. This allows for very precise welding. Setting the "Wobble Diameter" a little larger can make the weld bead width a little wider. This is the "Wobble Diameter" set to 2.5mm. If you want a wider bead width than this, you can set the "Wobble Diameter" a little larger. This is the "Wobble Diameter" set to 5mm. You can adjust it up to 5mm. You can also make the weld bead width different if necessary. Next up is "Wobble Type"... Let me show you how welding works according to "Wobble type". It's in cycle mode. A circle shape is made. You can understand that weaving is repeatedly circled. This function is easy to use when welding thin sheets and fillet. The next is line mode. It is easy to weld the "Butt Weld" or "Corner Out Side". It is also useful for welding using filler wires. Then point mode... The beam is strong because energy is concentrated on one point. Easy to stitch weld, spot weld. Next, triangle mode... It is welded with a clear scale pattern. Excellent welding effect and suitable for all welding methods. And then double cycle mode... There is one more small circle in the big circle. It's an improved version of "One Cycle Mode." It is advantageous when welding various corner parts. Next, "eight-character mode. "8-character mode" is an extension of the triangle mode. Effective when welding the interior and exterior of corners or thick steel plates. In the past, there was no function to select the diameter or shape of the beam. It's the latest feature. If you have a plan to purchase a laser welder, it would be good to check this part. These functions are more utilized than you think. And there is one more thing you need to check when choosing a laser welder. This part is called a oscillator. I heard you need to use a good oscillator. It is said that the oscillator is a very important part of a laser welder. Each oscillator manufacturing brand has a different preference and ranking. As the performance is good, there is a big difference in price. I can't show you the name of the oscillator in the broadcast that was released. Contact NSWEL to get a more accurate answer. And I'll tell you some precautions when using a laser welder. This "laser gun" should be handled with care. Treating important parts of the body with respect... There are glass lenses in the laser gun. If you give a shock, the lens can break. Lens are consumables. The price is not expensive. Instead, it could be the cause of the machine failure. Be careful as it may affect the welding. And the ground wire... The laser welder is not intended to allow current to flow because it is not welded in a current-flowing manner. It's for safety. This is why the laser is fired only on the part where the ground wire is connected. Laser will not be fired where the ground wire is not connected. However, if you connect it directly to the "laser gun", the laser will be fired anywhere. There are times when you work like this for convenience. It's definitely convenient and has advantages. But you have to be very, very careful because it's very dangerous. It could be a "laser gun" from Star Wars. This is a feeder. It is a machine that supplies filler wires. Similar principle to feeder or MIG welder of CO2 welder. If there is no gap between the steel plates, you can only use the laser without a filler. However, there may be gaps between steel plates, or welding may be required while supplying filler wires for stronger welding. In that case, connect the feeder to the "laser gun" and use it. I'll show you one last interesting thing. This is a stainless steel plate with a thickness of 4 mm. This is the iron plate that I just did TACK. I'll show you what happens when you weld this. Raised the laser power. So it's welded like this. I'll show you the back of the iron plate. It's completely penetrated to the back of the steel plate. I didn't even do beveling on the steel plate. There's no gap between the plates. Welded without any preparation for penetration. I think a thicker iron plate will be able to penetrate. It is not recommended to increase the laser power like this. But you have to feel what this means. It means you have to be nervous. Technology continues to develop further. In order not to fall behind in the upcoming future, I think you need to adapt well to the changing times. Now, the laser welder is a machine that can be used for a variety of purposes. It's a machine that even older brothers who don't know about welding can handle very easily. The speed and efficiency of the work are also excellent. But the price of the machine is very expensive. That's why you should consult with the manufacturer. Please visit and test drive yourself and choose carefully. If I tell them that I contacted them after being introduced by HAGOJIBI, they will take special care of me, so please keep that in mind. Please use my name. So that's it for today. If today's video was useful, please "Subscribe", "Like", and "Set Notifications". Okay, so I'll finish this today and come back with another topic next time. Thanks for watching.

Channel: weld [HAGOJIBI]

Views: 1,473,838

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Id: _2ztPipaemU

Length: 14min 37sec (877 seconds)

Published: Sun Aug 22 2021