Laser welding

Laser Welding – How It Works

Laser welding technology is truly the gift of modern science and it has facilitated some of the finest manufacturing processes in modern industries, to enable them to produce parts that carry out medical procedures that were only imagined in the past!

Though Laser welding technology and precision laser welding systems are complicated and quite expensive,  it is heavily used in industries that have gauged its true significance and value. These industries know that laser welding needs the backup to grow and to come to the terms for which it actually has been developed! There is lesser and almost negligible production of vibrations, which is a great advantage in manufacturing industries.

Importance of laser technology

Laser technology has gained confidence in joining plastic parts that are sensitive to heat and other elements; involve complex geometries; or have strict cleanliness requirements, like the ones used in medical areas.
The most important and striking feature of a precision laser welding system in plastic joining is the ability to create precise, strong, and hermetic welds, which is further accompanied with minimal resin degradation, particulate generation, and marring of the part surface around the weld. This advanced technology has enabled laser welding to perform on colored substances also!

Prototype Laser Welding

Prototype Laser welding is one of the most important areas of Laser welding technology. Precision laser welding systems provide ample resources to meet the demands of short-term prototype welding processes, which are necessary for prototype metal casings, including steering column casings for a production car. The welded prototype projects may include wiper systems, door lock mechanisms, brake assemblies, and portions of steering columns, which are quite clearly the important ones for automobile engineering and quality testing.

The requirement of welds in these parts to have high accuracy and highly localized weld strength. Though these parts are made by traditional stamping or cold forging, they still require the services of advanced laser welding technology for the accurate assembly.

Microscopic Laser Welding

Microscopic laser welding is another type of precision laser welding system that offers good advantages over conventional methods of welding. The weld quality produced by microscopic laser welding is very good, as lasers have extremely low heat input during the welding process. This results in a minimal heat-affected zone (HAZ) around the welded area, which is directly linked to the quality of the weld. The advantage of this feature gets more importance where polished surfaces are required. There is almost a zero sink around the weld, and it becomes very difficulty to detect the weld after the surface has been finished.

However, as almost with everything in this world, microscopic laser welding has some disadvantages when it comes to the welding process. A laser head is a fixed unit that is used in conjunction with a microscope, which makes it necessary for the workpiece to be manipulated versus a TIG torch. This is a difficult task and at the same time is costlier.  This also leads to the slowness of the process, which further increases the cost involved.