Thanks to the increasing attention being paid to fire and smoke resistance, the number of deaths and injuries resulting from fires in buildings has been falling for many years.
Do you want to protect people, goods and buildings effectively against fire?
If so, the right structural security is essential.
Low Impact Laser Welding
After years of experience in the field of laser fusion, Lasermach has developed a low impact laser technology, which allows us to weld together pre-polished flat components to a special profile without damaging the visible surface beside the welding bead
The right answer for architecture and design
This special laser welding technique has been specifically developed for high-end stainless steel architecture and design applications. By Reducing the weld penetration to <1.5 mm with a special low heat and splatter free laser beam, almost any profile design can be achieved and at an affordable price.
Due to the great design flexibility, functional optimization and high precision, these new technology of laser welding, is popular among architects for visible and representative steel curtain walls, canopies, and a wide range of other uses. For this purpose we offer eye-catching results with standard and custom profiles, which are produced mostly in stainless steel 304/304L (1.4301/1.4307) and 316/316L (1.4401/1.4404).
Be free to innovate
Low impact laser welding of profiles offer a very high degree of design freedom, not only in size and geometry, but also in web design. From small perforations to large cut-outs, the web can be designed in a unique way, creating attractive design solutions.
WELDING TECHNIQUES EXPLAINED FOR STEEL WINDOWS/DOORS
Welding is essential in the manufacture of buildings, bridges, cars, aeroplanes, pipelines, power stations and a host of other structures and objects. There were four main welding techniques used in the modern manufacturing and construction industries. Now with the fifth one, overshadowing the four others, the welding market for construction of doors, windows is completely shifting to nr 5: Laser Welding or handheld laser welding.
Welding is a process that is rarely seen, oft-forgotten, and largely invisible – out of sight, out of mind. Disregarding it, however, could also leave you severely out of pocket. That’s why it pays to take welding and fabrication seriously in the steel window industry.
But this begs a fundamental question – given that there are so many different welding techniques, which is the right one for a specific application? There are essentially four main types of welding.
Gas metal arc welding (GMAW) and flux core arc welding (FCAW) use the same core process – consumable electrode wire is automatically fed into the welding arc so that users do not need to replace the electrode as often as they do in, say, shielded metal arc welding (SMAW).
- A wire feeder synchronises with the power supply to deliver wire from a spool at the appropriate speed. Most electrode wires also require a shield gas which feeds through the same cable as the wire. However, with self-shielded flux-core wire, the wire produces its own shield gas and protective slag.
- The tip conducts electricity through the electrode wire. A gas diffuser releases the gas into the nozzle, which then blows out around the weld puddle to repel contaminants. When gas, wire and electric power are united properly, the wire melts steadily into the workpiece.
- The amperage, voltage and wire speed used in GMAW/FCAW will vary depending on the metal being welded and the type of wire being used.
- GMAW and FCAW have many different options for nozzles, tips and diffusers. Protruding tips and tapered nozzles can aid welding in narrow spaces while recessed tips enable higher burn-off rates.
- Self-shielded FCAW does not normally require a nozzle as there is no external shield gas. However, FCAW with a shield gas is extremely resistant to atmospheric interference like wind.
Shielded metal arc welding (SMAW) – commonly known as ‘stick welding’ – is one of the most widely used welding processes for joining metal. For stick welding, each electrode has a metal core that can contain different types of metal and an outer covering of flux.
- The flux coating shields the arc from contaminants in the air, making the finished weld stronger. Flux also helps eliminate tiny holes that can form in the weld (metal porosity), as well as cracking, undercutting, and spatter.
- If an electrode has absorbed moisture, using an electrode oven to dry it out can restore its ability to deposit quality welds.
Gas tungsten arc welding (GTAW), commonly known as TIG (or tungsten inert gas) welding, is a versatile welding process for joining metal. Both AC and DC power sources can be used in TIG welding; which is chosen will depend on the type and thickness of the metal to be welded.
- A TIG torch is an electrode holder that supplies welding current to the tungsten electrode and an inert shield gas to the arc zone. A collet-like clamping device allows adjustment so that the right length of electrode extends beyond the shielding gas cup.
- TIG welding uses a non-consumable tungsten electrode and has an extremely high melting point which means that TIG electrodes can heat other metals to their melting points without themselves melting.
- Argon and helium are the main shielding gases used in TIG welding. In some applications, however, a mixture of the two gases can prove advantageous. On occasion, hydrogen is mixed with argon or helium for special applications.
Laser Welding or Handheld laser Welding, is becoming the most popular welding method for windows and doors production. Because of the need for high productivity and weld quality, the window-door industry has readily adopted Laser Wobble Welding, which includes applications for seaming, sealing, and welding of window/door body structures, .