Location History:
- Amagasaki, JP (1979 - 1993)
- Hyogo, JP (1989 - 1998)
Company Filing History:
21 out of 21,351 
3 out of 488 
Years Active: 1979-1998
Title: **Innovative Contributions of Yoshihiro Ueda in Welding Technology**
Introduction
Yoshihiro Ueda, an inventor based in Hyogo, Japan, has made significant contributions to the field of welding technology with a total of 24 patents to his name. His innovations, particularly in pulse welding apparatus, aim to enhance the quality and efficiency of welding processes.
Latest Patents
The latest patent developed by Ueda pertains to a pulse welding apparatus that utilizes pulse discharge created on the tip of a wire electrode. This innovative system addresses challenges encountered during arc welding or short-circuit transfer type arc welding. When a molten droplet does not separate effectively from the wire electrode due to variations in welding conditions and external disturbances, it can lead to defects such as undercut in the welding bead. Ueda's design improves this by dividing the pulse current supplied to the base metal into multiple groups, ensuring that the average current reaches its maximum peak value at a predetermined time. The group of pulse currents is structured with a hill-shape envelope that corresponds to the separation phenomenon of the molten droplet while varying the pulse period, pulse width, and pulse interval. In addition, Ueda's method allows for the instant control of the short-circuit and arc according to the detected arc length or wire-supplying speed, ensuring a regular transfer of the molten droplet to the base metal.
Career Highlights
Yoshihiro Ueda's professional journey includes significant roles in well-respected companies such as Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Denki K.K. His work with these companies provided him with valuable experience and resources to innovate in welding technology.
Collaborations
Throughout his career, Ueda has collaborated with notable coworkers including Shigeo Ueguri and Yoichiro Tabata. These collaborations have likely contributed to his advancements in welding processes and the development of his patented technologies.
Conclusion
Yoshihiro Ueda's inventive spirit and dedication to improving welding technology through his patents have established him as a significant figure in the industry. With 24 patents to his name, his work not only addresses practical challenges in welding but also enhances the overall quality and efficiency of welds in various applications.