Company Filing History:
5 out of 140 
1 out of 929 Years Active: 1990-1995
Title: Keizo Namba: Innovator in Aluminum Welding Technologies
Introduction
Keizo Namba is a prominent inventor based in Nagoya, Japan, known for his significant contributions to the field of aluminum welding technologies. With a total of 5 patents to his name, Namba has developed innovative methods that enhance the efficiency and effectiveness of welding aluminum alloys.
Latest Patents
Namba's latest patents include a groundbreaking method of spot welding aluminum alloys. This method focuses on aluminum alloy workpieces with an electrical conductivity of approximately 18 to 57% IACS and a Vickers hardness ranging from 26 to 200. The process utilizes welding electrodes that possess an electrical conductivity of no less than 92% IACS and a Vickers hardness between 50 and 130. The differences in electrical conductivity and Vickers hardness between the welding electrodes and the aluminum alloy workpieces fall within a range of 41 to 87% IACS and not larger than 99, respectively.
Another notable patent is for multilayer plated aluminum sheets, which are particularly suitable for automobile body panels. This innovation comprises a base aluminum sheet made of aluminum or an aluminum alloy, featuring a first layer of zinc or a zinc alloy formed by displacement plating on the surface. Additionally, one or more layers of electroplated coating are formed on the first layer through electroplating in an acidic bath. The upper electroplated coating includes at least one layer of zinc or a zinc alloy, with the uppermost layer made from a metallic material that has a melting point above 500 degrees Celsius.
Career Highlights
Throughout his career, Keizo Namba has worked with notable companies such as Sumitomo Light Metal Industries, Ltd. and Sumitomo Metal Industries, Inc. His experience in these organizations has allowed him to refine his skills and contribute to advancements in aluminum welding technologies.
Collaborations
Namba has collaborated with esteemed colleagues, including Tadashi Nosetani and Hiromichi Sano. These partnerships have fostered a creative environment that has led to innovative solutions in the field.
Conclusion
Keizo Namba's contributions to aluminum welding technologies through his patents and collaborations highlight his role as a significant innovator in the industry. His work continues to influence advancements in manufacturing processes, particularly in the automotive sector.