laser welding

a highly focused WELDING laser beam

Precision Laser Welding

Clean, reliable laser welding of even fragile materials

SWS-Trimac provides Laser Welding services for a wide range of industries and offers many options in both CO2 and solid-state fiber Laser Welding technologies. These processes are capable of welding thicknesses ranging from foil to 3/8” of an inch in Carbon Steels, Stainless Steels, Copper, and Aluminum, just to name a few. 

Laser Welding processes generate light energy that can be absorbed into materials and converted to heat energy. By employing a light beam, we can transmit this energy from its source to the work piece, using an array of delivery optics, which can focus and direct the energy to a very small beam spot. The typical spot size of the laser is approximately .012” in diameter. The focal point can be adjusted above or below focus; this variable will affect both weld penetration and the width of the weld signatures, which is very important depending upon joint design and application. The speed of welding is proportional to the amount of power supplied but also depends on the material type and thickness of the work pieces.

Laser Welding may be used in a continuous or pulsed mode, depending upon the type of Laser Welding technology.

SWS-Trimac offers Hot Wire Feed Laser Welding

Laser Hotwire, the laser beam heats the base metal. The pre-heated wire is fed in, and brazed or welded with the base metal. The result is a fusion zone with added ductility for crack sensitive applications or added volume for those applications with excessive joint gaps or chamfers. This can be reliably done at high welding speeds, great weld quality that is nearly spatter-free which offers very fast cycle times and less rework potential.

SWS-Trimac also offers Laser Welding with Scanner technology via PFO 3D scanning head.

 In this process, the laser beam is directed by moving mirrors. The welding head guides the laser beam over the workpiece. A processing field emerges which enables highly dynamic and precise welding. Due to the very fast translation movements of the mirrors, non-productive times are reduced increasing the available production time. SWS-Trimac uses these PFO scanners in conjunction with CNC controlled multi axis welding cells.

Which Laser Welding method?

SWS-Trimac will help you decide on the method best.

Welding process is most often dictated by the application. Our engineering staff can guide you through the selection process best suited for your application, utilizing our many years of Welding experience. SWS-Trimac welds tens of thousands of welds per week, multiple shifts utilizing an array of Laser Welding processes for an array of industries specific to both the customer and applications needs. We often find clients whom are looking to duplicate a process already proven or previously qualified. SWS-Trimac maintains flexibility with an array of laser welding options so we may process a full range of material thickness at competitive rates.

Solid State Lasers vs CO2 Laser Welding

Welding

Solid State Laser:

Solid State Laser Benefits

  • SWS-Trimac offers the latest in Solid State Laser Welding utilizing Disk Laser / Nd:YAG welding technologies. These Laser Welding technologies emit a beam of light through a fiber optic cable to a welding head that collimates and focuses the beam to a .008” spot size. These Laser Welding technology offers a pulsed mode typically used in thin thickness, while continuous beam option is often used for deeper cross-sectional thicknesses and remains the most common mode of Laser Welding.
  • Some of the advantages of the solid-state lasers such as Disk Lasers are the need for weld related gases are nearly none existent. The only gas needed is for shielding and in many cases eliminated. The energy consumption of solid state lasers is considerably less in comparison to CO2 and this allows SWS-Trimac to be very competitive and is reflected in a lower unit cost per weld.
  • Additionally, disk lasers can be easily adapted for prototype and production environments, due to their lower space requirements than CO2. The quality of the welding in many cases produces better cosmetic appearance as well – and the welding speed is typically faster. Solid State disc lasers will almost always outperform CO2 in the thin material range below 1/8 inch thick.

CO2 Laser:

CO2 Laser Benefits

  • Laser Welding with CO2 welders still have their place! Often when welding high carbon steels that are crack sensitive or greater weld depths in materials ranging above ¼ inch we still find this to be the sweet spot. Keep in mind that the wavelength will not allow the welding of copper or aluminum.
  • Over the years, CO2 had been the most popular Laser welding technology offering an array of possibilities and most widely used by the Automotive Industry. The Laser beam as delivered is reflected off a series of mirrors and ultimately collimated and focused to approximately a .015” beam spot at the weld surface.
  • Laser Welding with CO2 technologies requires the use of a shielding gas to protect the weld area from atmospheric gases.

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