Advances in Laser Microwelding — Lesson 2

This lesson covers the advanced techniques in laser micro welding processes and their applications in various fields, particularly in the medical devices industry. It delves into the shadow technique, laser droplet welding, laser spike welding, and the twist technology. The shadow technique is used for stepless high-speed accurate and discrete one pulse welding. Laser droplet welding is used to overcome the gap bridging in highly reflective and heat-sensitive materials. Laser spike welding is used to bridge gaps in micro welding. The twist technology is used for transmission welding by incremental scanning technique. Each technique is explained in detail with its working principle, applications, and limitations.

Video Highlights

01:32 - Application of the shadow technique in welding watch components
04:58 - five phases involved in the laser droplet welding process
09:10 - Explanation of the TWIST technology, a transmission welding by incremental scanning technique

Key Takeaways

- The shadow technique is a promising method for high-speed, accurate, and discrete one pulse welding, mainly applicable for metallic materials.
- Laser droplet welding is an advanced technique that overcomes the gap bridging in highly reflective and heat-sensitive materials.
- Laser spike welding is a method that uses recoil pressure-driven material flow to bridge gaps in lap joint configuration.
- The twist technology is a variant of laser transmission welding used for welding transparent polymers without any absorbing additives.
- Each of these techniques has specific applications and limitations, and their selection depends on the material and the specific requirements of the welding process.