The welding point penetration and effective penetration decrease with the laser tilt angle. When it is greater than 60°, the effective welding penetration decreases to zero. Therefore, the best choice for welding aluminum alloy is sharp wave and double peak wave. Under the strong vibration of light electromagnetic waves, strong reflected waves and weaker transmitted waves are generated. The reflected waves are not easily absorbed by the aluminum alloy surface, so the aluminum alloy surface has a higher reflectivity to the laser at room temperature. It can be seen that aluminum alloy has the characteristics of high reflectivity to laser light and low absorption rate.
By controlling the width, energy, peak power and repetition of laser pulse Frequency and other parameters, the workpiece melting, forming a specific pool. Because of jewelry laser welding machine’s unique advantages, has been successfully applied to gold and silver jewelry processing and micro, small parts welding. It’s more flexible to implement flexible transmission of non-contact welding for those difficult to weld site.
The high level of automation allowed by such a process also makes it possible to detect and solve any quality problems. 3) Provide large-scale optical fiber equipment exhibition hall for customers to confirm the strength of our company. Motors and software integrated and installed by the swiss company NUM, over 20 years of cooperation has made development and integration possible in a very short time. Weldlogic offers contract manufacturing services through our in-house sister division W.S.I. (Weldlogic Services, Inc.) if you would like to develop a product or the volume is not high enough to justify capitol investment. MPS Compact A multi-purpose laser workstation with high process reliability. The TruArc Weld 1000 is an automated welding cell – profitable even for small lot sizes, easy to program and can be operated even without welding expertise.
In that way, a proportion of the fibers remain unmelted, and the strength and often flexibility of the fabric may be retained at the seam. FIGURE 4 shows a design for a waterproof jacket in which continuous and hermetic overlap welds are made in waterproof fabric laminate. The potential therefore arises for further automation of garment manufacturing for waterproof clothing, personal protective clothing, and other textile products. Fiber lasers are a new type of solid-state laser that generates the laser beam by pumping diode light directly into a fiber optic, causing a laser beam to be generated right inside the fiber optic.
Plastics of the same type have the highest level of connection stability after laser welding. If the plastic contains a high proportion of glass fibers, this may result in somewhat brittle welding connections. It is therefore recommended that a glass fiber content of 40% is not exceeded. A laser-transparent material with glass fiber should not be thicker than 2 mm.
The lower levels of heat required by fiber laser welding are not only environmentally friendly, but also mean there is very minimal damage caused to surrounding components/materials and all of this is delivered at a lower operating cost. Mehta CAD CAM has introduced a welding machine equipped with 1 KW and 1.5 KW fiber laser sources having a hand-held laser welding gun. This controlled workpiece heating and cooling is not necessary with pulsed laser-welding equipment due to the low heat input.
LightWELD is a Class IV laser system and routine precautions are required for the safe operation of the equipment. Operator protective equipment including welding gloves, welding shield and 1070 nm laser-safe glasses are required. Electro-optical conversion rate-high laser light output per second is optional. Not only can do pulse welding, but also continuous welding at high frequencies. A variety of hand-held laser heads are available for various needs such as external welding, internal welding, right-angle welding, narrow-side welding, and large spot welding, etc.
Fiber lasers are now widely used for welding of a very wide range of thicker metals. The near infrared 1070 nm wavelength has definite advantages over the incumbent CO2 laser technology due to the lower reflectivity of metals at this wavelength. This is particularly true for high reflectivity metals such as aluminum and copper where high power fiber lasers are used to weld up to 15 mm, these thicknesses have not previously been welded with other lasers.
Among aluminum alloys, the 6000 series Al-Mg-Si alloys are especially sensitive to cracks. Usually, crystal cracks appear in the weld zone, and liquefaction cracks appear in the near-joint zone. During the instantaneous solidification of the alloy, the solubility of hydrogen decreases sharply when it changes from liquid aluminum to a solid state. If the excess hydrogen in the liquid aluminum cannot smoothly rise and overflow, it will form hydrogen pores. In addition, the presence of cracks and pores in the weld leads to a decrease in tensile strength.
Together with higher-speed and lower-cost processing, the high uptime and availability of the laser welding system enabled by the zero-maintenance fiber laser make for the lowest cost per part welding, and the fastest return on investment. Shipbuilding is easily one of the most demanding industries for any process, including welding. Swapping in laser welding for traditional welding techniques can make the construction of steel or metal structures in ships faster and stronger.
Due to the high welding speed heat affected zone is very small and sensitization does not become an important issue. The focal position of the beam is one of the most difficult factors to monitor and control among the welding parameters that have a great impact on the quality of the weld. Laser spot power density, in the case of a certain beam pattern and focus mirror focal length, is mainly determined by the laser power and beam focus position. If the assembly gap is too large, the beam can pass through the gap and cannot melt the base material, or cause obvious nibbling, depression, such as spot to seam deviation is slightly larger may cause unfused or not welded through. Generally required base mode or low-order mode, otherwise it is difficult to meet the requirements of high-quality laser welding.
Another benefit of the high power density of a laser is that it melts material a lot faster than a flame or an electric arc. This allows for faster welding rates and the creation of stronger welds. The depth of penetration in laser welding can be controlled by adjusting the power supplied to the laser. For very thing materials, pulses of the laser can be used instead to prevent damage to both the material and the machine. The number one thing that makes the transition to laser welding worth it is that it fits right in with an automated manufacturing process.
Selective thermal expansion therefore does not take place, which also avoids distortion of the workpiece after cooling. Finishing the welded construction on a straightening bench is therefore not necessary after laser beam welding. In addition to precision and low heat input, the working speed is one of the outstanding properties of laser welding. Under ideal conditions, a long, straight endless seam can be welded at a speed of up to 60 m/minute. Since the intensity of the laser beam can be varied, the impact of the material used is less decisive for the working speed of a laser welding system. The ideal complement to a laser welding system is a laser cutting system.