Advanced Welding Processes — Lesson 1

This lesson covers the advanced welding processes, focusing on laser beam welding, electron beam welding, and micro welding. It discusses the advantages and disadvantages of these processes, the factors that influence their effectiveness, and their applications in various industries. The lesson also delves into the concept of wire additive manufacturing processes and how they are associated with laser beam welding. It further explains the conduction mode and keyhole mode in laser welding, the role of power density, and the impact of laser power density on the welding process. The lesson also touches on the advancements in laser micro welding processes and the recent developments in this field. It also discusses the application of welding processes in the medical field, particularly in the manufacturing of medical devices.

Video Highlights

01:41 - Overview of advanced welding processes including laser rolling, laser assisted hybrid rolling, and electron beam welding
06:12 - Pulse shaping in laser welding processes
10:38 - Advanced welding processes like hybrid laser welding and electron beam welding
26:30 - Challenges in welding dissimilar materials
45:37 - Micro welding processes in medical devices

Key Takeaways

- Laser beam welding and electron beam welding are high-cost, high-precision welding processes that offer advantages such as deep penetration and high welding speed.
- The conduction mode and keyhole mode in laser welding are determined by the power density. The conduction mode involves heat conduction, while the keyhole mode involves the formation of a keyhole due to vaporization of the material.
- The advancements in laser micro welding processes have led to the development of more efficient and precise welding techniques.
- The welding processes have wide applications in various industries, including the medical field where they are used in the manufacturing of medical devices.
- The welding processes can be used to join dissimilar materials, making them versatile and adaptable to various applications.