In hermetic and seam sealing applications utilizing pulsed laser welding, it is critically important that weld spots are evenly spaced, overlapping to form a continuous welded seam. Traditional pulsed laser welding approaches attempt to do this by firing the laser at a constant repetition rate. While this can be made to work along straight lines or other paths that can be traversed at constant speed, the result is sub-optimal and the approach really falls short when welding along irregular contours. For example, it does not work well for hermetically sealed packages, such as implantable medical devices, aerospace sensors or electronics modules.
Are you looking to use lasers for micro welding? If so, you have four excellent options: pulsed neodymium-doped yttrium aluminum garnet (Nd:YAG) and three different fiber lasers: continuous wave (CW) fiber, quasi continuous wave (QCW) fiber, and nanosecond fiber. In today’s post, I am going to compare the pulsed Nd:YAG laser with the three fiber laser options, and give some general comments on why and when one might be chosen over the other. I’m going to follow that up with another post with more information on how to choose.
How would we survive without battery packs? Whether to power our latest portable electronic device, power tool, or hybrid/electric vehicle, the removable battery pack is essential to our everyday lives. Tab-to-terminal connection is one of the key battery pack welding applications. Manufacturers need equipment, systems, and automated lines that meet quality and production requirements for these products. Resistance and laser technologies are both good options for integration into production lines, either as standalone units or for automated operation.
Topics: battery pack welding
Not long ago I worked on an interesting project with an aerospace customer looking to develop an in-house laser welding process for a major turbine component. Thanks to our joint efforts, they were able to bring the operation in-house, achieving an impressive seven to eleven day cycle reduction. What’s more, the new process helped them reduce their inventory, translating to a large cost savings - all without sacrificing quality.
Topics: laser welding
This fourth installment in our multi-part series exploring micro pulse arc welding (micro TIG welding) focuses on “Touch Start” technology, which requires much lower voltage than the standard DC start system. Low voltage operation means no high frequency noise emission.
This is the third entry in our multi-part series exploring micro pulse arc welding welding. Today we will cover troubleshooting – tips for improving your results when you’ve followed all the recommended setup tips and you’re still getting spurious results, inconsistencies, or part shrinkage.
This is the second in our multi-part series exploring pulsed micro tungsten inert gas (TIG) welding. Today we will cover setup tips and tricks.
Today, we are embarking on a 7-part series exploring pulsed micro tungsten inert gas (TIG) welding, also known as micro pulse arc welding. In our first installment, I’ll cover general features of a pulsed micro TIG system, and review the welding applications for which it is best suited. Later blog posts will cover setup tips, improving TIG results, touchstart, pulsation, monitoring, and safety.
You heard it here first: there is no single materials processing technology that fits all applications. Manufacturers looking for a robust, production-ready solution must follow a rigorous process to determine the best choice of equipment. There are no short cuts or magic wands – you have to carefully review process feasibility and part design to maximize production reliability. The evaluation must also consider overall system needs.
Fading or disappearing laser marks on medical devices? You're not alone. It's a daily battle for many contract manufacturers and end users, and it’s a topic I am often asked about. People especially want to know what they can do to make passivation resistant marks on their medical device parts and surgical tools in order to meet unique device identification (UDI) requirements.