Laser Welding Technology – Optimization of Welding Parameters and Inputs to Achieve Optimal Weld Quality and Process Efficiency - ON-232

Preferred Disciplines: Mechanical Engineering, Welding Engineering (Master’s or PhD student)
Company: Samuel, Son & Co., Ltd 
Project Length: 6-12 months
Desired start date: Summer/Fall 2019 
Location: Markham, ON
No. of Positions: 1
Preferences: None

About the Company: 

We are a premier manufacturer of specialty engineered stainless steel and high nickel alloy welded and drawn tube used extensively for automotive fuel handling systems, aerospace, heat exchangers, and other demanding applications.

Project Description:

Welding parameters play an important role in obtaining superior product quality.  The benefits of laser welding are high welding speeds in conjunction with a narrow fusion zone resulting from the high-power density of the process.  Operating in a keyhole mode generates intense energy density, rapidly heating the base metal to the point where it starts to vaporize at the center of the beam spot creating a keyhole.  Many of the challenges associated with our current laser technology have been overcome through lessons learned through the course of production.  A deeper understanding of interactions between some of the variables would further benefit and permit higher process speeds as well as reduced material losses.

Research Objectives:

  • Model the process gas flow rates and their effect on weld pool interaction with both the coaxial nozzle and lateral gas supply.
  • Integrate a valve control to study the influence of gas flow rates and determine optimal parameters for the existing system given current hardware constraints.
  • The current system provides two (2) processing gases (argon & helium) which are mixed prior to exit. Determine by empirical means  the ideal ratio for these gases with respect to their impact on beam coupling stability, spatter generation, and weld bead profile.
  • Determine the optimal impingement point of lateral gas flow in reference to keyhole plasma.  The lateral gas tube has various ID size options which is dependent on the gas selected.  


Methodology is to be developed in conjunction with the supervisor, but should focus on correlating published material properties with a collection of empirical data obtained during controlled R&D runs on production intent equipment.  

Expertise and Skills Needed:

Strong accumen in laser welding technologies

For more info or to apply to this applied research position, please

  1. Check your eligibility and find more information about open projects
  2. Interested students need to get the approval from their supervisor and send their CV along with a link to their supervisor’s university webpage by applying through the webform or directly to Ivette Vera-Perez