Laser Demonstrations at EWI during Principles of Lasers and Hands-On Laser Safety Officer Training

By Jay Eastman on Thursday, June 4th, 2015 in EWI – Company. No Comments

EWI will once again host Rockwell Laser Industries for their Principles of Lasers and Hands-On Laser Safety Officer Training. This training will take place from August 3 through August 7. More information can be found on the Rockwell Laser Industries website or the specific links below. Principles of Lasers : August 3, 2015 Hands-On LaserRead more

Conduction Mode vs. Keyhole Mode Laser Welding

By Jay Eastman on Friday, February 20th, 2015 in Advanced Energy, Automotive, Laser Processing. No Comments

There are two types of heating “modes” used to describe the resulting melting of the metal during laser welding. These are called “conduction mode” and “keyhole mode” heating. These modes of heating are created by different power densities and produce different results. Power density is defined as the power of the laser beam divided byRead more

Using a Q-Switched Fiber Laser for Paint Removal

By Jay Eastman on Tuesday, September 30th, 2014 in Advanced Energy, Aerospace, Automotive, Consumer Electronics, Defense, Events, EWI – Company, Laser Processing. No Comments

At EWI, I was fortunate to be able to use an IPG q-switched fiber laser for several months. During this time I evaluated it for removing paint from aircraft aluminum along with other applications. Q-switched lasers are unique in that they deliver very high power bursts of laser energy in short pulses. The term “q-switch”Read more

When the Laser Beam goes Out of Focus during a High Speed Fiber Laser Weld

By Jay Eastman on Tuesday, September 2nd, 2014 in Automotive, EWI – Company, Laser Processing. 1 Comment

I was setting up a demonstration of high-speed fiber laser welding using a scanner in EWI’s laser lab. I mounted a ScanLab scanner to EWI’s high speed motion system to manipulate and focus the laser beam. The laser used was a 600-watt IPG single mode fiber laser. I programmed the motion system to move theRead more

Green Laser Welding

By Jay Eastman on Monday, January 28th, 2013 in EWI – Company. No Comments

 GREEN LASER WELDING EWI is using its Miyachi Unitek™ LW2AG, 532nm wavelength, pulsed green laser. The 532nm wavelength produces visible green light. The state-of-the-art laser increases EWI’s capability for non-contact joining of small conductive parts such as gold and copper. EWI will use this laser for a variety of joining applications for its manufacturing customersRead more

Solidification Cracks on Electroless Nickel Plated Steel Pulsed Nd:YAG Laser Welds

By Jay Eastman on Tuesday, September 27th, 2011 in Laser Processing. 1 Comment

There can be a difference between the pulsed Nd:YAG laser weldability of electroless nickel plated steel and electroplated steel. Solidification cracks in pulsed Nd:YAG laser welds have different causes depending on the metals being welded and the joint design. Platings can cause solidification cracks. How the plating was applied can also influence solidification cracking.  Electroplated parts can perform better whenRead more

Manual Laser Weld Repair

By Jay Eastman on Friday, March 18th, 2011 in Laser Processing. 2 Comments

 Manual laser weld repair is a process where a pulsed Nd:YAG laser is used to melt the surface of a metal, with or without added filler wire, to repair or build-up the surface. The process is totally manual with the operator typically watching the operation through a binocular microscope. The laser on/off can be controlledRead more