Laser Welding Plastics

The Waveguide is a custom-tailored tool that directs the laser at a precise target line to heat and join the plastic. This enables the heating and plastification of an entire weld line at once, and provides a uniform melt down and weld collapse. The company will design and manufacture three automated production cells equipped with laser processing machines for metal components manufacturer Gestamp.

Under the continued action of high power density laser, it is easy to generate a plasma cloud, which not only reduces the absorption of the laser by the workpiece, but also makes the welding process unstable. In laser-MIG composite welding, volatilization occurs not only on the surface of the workpiece, but also on the filler wire, allowing more metal volatilization and thus easier energy transfer from the laser. In addition to the energy input to the weld zone from the arc, the laser also inputs heat to the weld metal.

The parameters are adjusted by the lever in the sealed cavity, which is simple and highly efficient. Fast, efficient, deep, little distortion, little heat-affect area quality welding, welding points free from pollution, saves energy. You are provided with the laser, focusing optics with sensor system, and laser machine all from a single source and perfectly adapted to your specific application.

Beneficial to both part design and lean manufacturing efforts, laser welding generates a fraction of the heat input of other welding methods, requires access to only one side of the part, and produces a narrow bead. Because no electrodes and usually no filler material are needed, repeatability with laser welding is very good. It is such a stable process that a high level of automation can be incorporated. In laser welding systems, the operator controls the beam diameter , power level, and pulse length depending on the type of alloy and joint being welded. A stereo-microscope with internal cross-hairs makes it easy for the operator to align and weld the jewelry piece at the correct location.

The beam focal diffraction limit spot size can be calculated from light diffraction theory, but the actual spot is larger than the calculated value due to the presence of focusing lens aberration. However, its measurement is a challenge for high power lasers, although many indirect measurement techniques are available. Only when the laser power density on the workpiece exceeds the threshold value , plasma is generated, which marks a stable deep fusion weld. All of this happens so quickly that the welding speed can easily reach several meters per minute. That is, the hole and the molten metal surrounding the hole wall move forward with the forward speed of the leading beam, and the molten metal fills the void left by the moving hole and condenses with it, and the seam is formed. The small hole is filled with high-temperature vapor generated by the continuous evaporation of the wall material under the irradiation of the light beam.

hand held laser welder

Laser brazing is not suitable for the connection of some components, but the laser can be used as a heat source for soft and hard brazing, which also has the advantages of laser brazing. Welding of different types of metals has to address the range of weldability and weldability parameters. Attention should be paid to the geometry of the wire element during welding. The second function of the shielding gas is to protect the focusing lens from metal vapor contamination and sputtering of liquid droplets. The power density is relatively evenly distributed in all planes away from the laser focal point. The laser and the arc affect the performance of the composite weld in different degrees and forms.

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.

When the welding process is terminated and the power switch is turned off, a crater will appear at the end of the weld. Due to the effective cooling, it is often recommended for high power laser beam focusing. Due to the influence of the spatter generated during the welding process and the laser mode, the shortest depth of focus used in actual welding is mostly focal length 126mm (5″). However, this method requires precise control of the gas flow size and direction, otherwise it is easy to produce turbulence and damage the melt pool, resulting in difficulty in stabilizing the welding process.

I have never seen a laser weld before but I think this might be the future of welding. If you use an inadequate waveform, 60% to 98% of the laser energy will be lost and your welding operation will fail. Like the fiber laser, the CO2 laser can penetrate thick sheets with great speed and efficiency. Like the CO2 laser, the fiber laser can penetrate thick sheets with great speed and efficiency.

Developed for copper material processing in the electronics industry, these blue diode lasers are now available in six power levels between 300 and 2000 W. Polymer products can be laser-welded using a variety of process mechanisms and alternative equipment configurations such as gantry, robotic, scanner, or fixed diode arrays. The laser provides an efficient energy source to give precise heating and localized melting. The welds are completed rapidly, with high strength and good appearance. The advent of alternative absorbers for laser welding in 1998 allowed the joint to have much less visible color.

ALPHA LASER U.S. develops and manufactures laser welding equipment for industry and trade. Our objective is to make laser welding exceedingly accurate and exceptionally fast. MORN Wobble-IV is the best handheld laser welding machine with fiber laser.

The wire feeder design can be fed during the welding process automatically, which is suitable for industry and household use. The hand-held welding gun is more flexible and convenient, meets welding at various angles and positions. The welding seam is beautiful and firm, and the operation is simple, fast, flexible, and low in processing cost. Compared with traditional argon arc welding and TIG welding, the efficiency has a huge increase.

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