Location History:
- Fukuoka, JP (2003)
- Kitakyushu, JP (2003 - 2005)
Company Filing History:
2 out of 1,102 
1 out of 832,912 Years Active: 2003-2005
Title: Yasuhiro Koga: Innovator in Welding Technology
Introduction
Yasuhiro Koga is a notable inventor based in Kitakyushu, Japan. He has made significant contributions to the field of welding technology, holding a total of 3 patents. His innovative approaches have advanced welding methods, particularly in carbon dioxide gas welding.
Latest Patents
Koga's latest patents include a high-speed carbon dioxide gas welding method. This arc welding technique suppresses sputtering and achieves a smooth bead penetration surface similar to MIG or MAG welding, while avoiding undercuts or bumping beads. His method allows for welding at rates of approximately 1.5 m/minute using a consumable electrode. The welding power source features a control mechanism that opens a short circuit at a rate of at least 500 A/msec upon detection of such a short circuit. This technique ensures proper globule volume during welding, based on computed welding voltage derived from specific formulas relating to wire feed rate and globule travel.
Another significant patent is the high-speed CO2 gas welding method, where the welding voltage is determined using the expression P = k × Vw + k × Vw. In this formula, the welding wire feed speed and radius are inputs, with P representing the power factor in kW, Vw indicating the melting speed of the welding wire in g/sec, and k being constants (k = 0.898 and k = 4.625).
Career Highlights
Throughout his career, Koga has worked with various companies, including Kabushiki Kaisha Yaskawa Denki. His experience in these organizations has contributed to his expertise in welding technologies and innovations.
Collaborations
Koga has collaborated with notable coworkers such as Shinji Okumura and Haruki Nakashima. Their joint efforts have furthered advancements in welding techniques and applications.
Conclusion
Yasuhiro Koga's contributions to welding technology through his patents and collaborations highlight his role as an innovator in the field. His work continues to influence modern welding practices and techniques.