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.
Nearly all color combinations can now be welded using transmission laser welding. The main problems arise with heavily filled plastics, where the upper part will not allow the beam to pass through to the joint. In these cases, the filler must be reduced or changed in particle size to reduce scattering, or another welding process should be considered.
If the joining gap is too large, a satisfactory result can still be achieved by deposition or fill welding – even with the laser welding process. The uniform, pulsed beam of laser welding also ensures a particularly clean seam. Welding beads or burrs, which are often unavoidable in gas-shielded or electric welding, do not occur in this joining process. Finally, any weldable material can be processed on a laser welding machine. Of all joining processes, laser welding offers the widest range of materials that can be processed.
The HAZ is the portion between the melted metal and unaffected base metal under it that undergoes adverse metallurgical changes, growing the grain structure and softening the metal. For TIG welding, the HAZ can be as deep as 0.15 inch, while the typical range for pulsed laser welding is 0.008 to 0.012 inch. The larger HAZ for TIG welding means a greater reduction in hardness of the metal in that zone. For TIG welding, the material in the HAZ is softened by 15 to 22 HRc points, compared to 2 to 4 points using pulsed laser welding.
Since many weldable thermoplastics only absorb a small proportion of the laser radiation from solid-state lasers, additives such as soot are added. The thermoplastics can therefore be melted and welded by the laser radiation. In order to ensure the reproducibility of the welding processes, a suitable receptacle also has to position components in a reproducible manner.
If the weld seam is C-shaped, it has a significantly higher welding speed compared to a linear weld seam. Laser remote welding is to install an oscillating mirror scanning head on the sixth axis of the robot to achieve laser trajectory movement only by the oscillating reflection of the lens, without the robot arm following the movement. Laser fusion welding can be divided into laser penetration welding, laser fusion welding and laser fusion wire filling welding, etc., which are mostly used for welding of automobile roof and floor, etc. The robot is responsible for executing the welding process and talking to the automation system to call the welding process parameters in the system. Note that the connection between the workpieces is achieved by brazing the molten metal and that the base material itself should not be damaged by severe laser fusion.
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.
The laser welding machine can weld special materials such as refractory materials of high melting point metals, and can even be used for welding machines of non-metal materials such as ceramics. It has good effect on welding special materials and has great flexibility. The non-touch long-distance welding machine is applied to the parts that are difficult to access by the welding machine.
The introduction of arcs greatly improved the laser energy utilization rate, and the weld penetration ratio also increased by 5%-20%. There will be no dents after welding, and the amount of polishing and grinding after welding is reduced, saving production costs. In the welding of aluminum alloy, continuous laser has obvious advantages. Arc craters are prone to appear during argon arc welding, and laser welding is the same. Figure 2 shows the comparison of the welding seam of the battery shell after pulse laser welding and continuous laser welding. Embrittlement or even cracks occur when using traditional laser welding.
Laser welded assemblies of high-strength steel are increasingly used in auto body manufacturing because of their excellent performance. Medium and high carbon steels and common alloy steels can be laser welded well, but require preheating and post-weld treatment to relieve stress and avoid crack formation. However, due to deformation of the workpiece, thermal lens effect or multi-dimensional spatial curves during the welding process, the focal position can change and may be out of the allowable range. Currently in production, manual adjustment and repeated process tests are required to determine the appropriate focal position in order to obtain the desired depth of melt.
Create virtually seamless joins for practically any consumer product or packaging application. Hermetic sealing systems that offer precision and speed to lower your assembly costs. A particulate-free process creates exceptional aesthetics and enhances design freedom. Scalability and faster cycle times improve yield rates, while our patented Simultaneous Through-Transmission Infrared process provides premium solutions not available anywhere else.
The DVS – German Association for Welding and Allied Processes is a technical-scientific professional association which is active in all areas of joining technology. Variety of detection and protection measures using, greatly avoid the faults caused by a variety of external factors or human misuse, to protect the equipment with long-term stable operation. Top brand gold cavity, high temperature resistance, corrosion resistance, the service life is 8 to10 years, the xenon lamp service life is more than 800 million times. EBTEC strives to ensure fast, precise component manufacturing and servicing for our customers.
ExactWeld 230 ExactWeld 230 enables precision laser welding of small metal parts. It is ideal for medical manufacturing, including endoscope production, and the fabrication of precision sensors, jewelry, watches and automotive electronics. Laser welding systems by TRUMPF are the perfect tool for precision metal welding. They can be used to optimally join materials with high melting temperatures as well as high conductivity.
The report provides invaluable insights into the players impacting the global Laser Welding Machines market such as their size, industry synopsis, and product offerings. The report aims to provide the definition, description, and overall forecasts of the global market along with market segments and sub-segments, covering separation by types, end-users, industry verticals, and the key geographies. This video displays the welding process of MORN LASER 2000W Auto laser Welding Machine.