Location History:
- Nagoya, JP (1984)
- Aichi, JP (1984 - 1985)
- Komaki, JP (1985)
Company Filing History:
8 out of 21,351 
1 out of 36,653 
Years Active: 1984-1985
Title: Hirohisa Segawa: Innovator in Arc Welding Technology
Introduction
Hirohisa Segawa is an accomplished inventor based in Aichi, Japan. He holds a significant portfolio of eight patents, focused primarily on advancements in arc welding technology. His innovative contributions have enhanced the efficiency and effectiveness of welding processes in various applications.
Latest Patents
Among his latest patents, two stand out for their technical ingenuity. The first is a "Consumable Electrode Type Arc Welding Apparatus," which allows for the reliable initiation of arcing under various welding conditions. This invention features a start current detector that selects a predetermined limited start current suited to the specific conditions and a start current period setting unit that adjusts the duration accordingly. A start current control circuit ensures that the necessary current is supplied to both the workpiece and the wire electrode during the arcing start phase.
The second notable patent is a "Short Circuiting Transfer Arc Welding Machine." This machine increases arc current density by introducing a pulsed current that fluctuates within upper and lower limits during arc production. This innovation not only promotes deeper bead penetration into the workpiece but also minimizes welding defects and accelerates the overall welding operation. Additionally, it enables the alternation of welding current flow direction at desired intervals, allowing the production of arcs in straight, reverse, and mixed polarities. This versatility allows users to adjust the wire melting rate and heat application to a broad range of requirements.
Career Highlights
Hirohisa Segawa has made notable contributions to the field of welding technology while working at prominent companies such as Mitsubishi Electric Corporation and Toyota Motor Corporation. His roles in these organizations have allowed him to apply his inventive ideas and further develop his expertise in welding systems, contributing to significant advancements in the industry.
Collaborations
Throughout his career, Segawa has collaborated with talented individuals, including coworkers Takaji Mizuno and Shigeo Ueguri. These partnerships have fostered a collaborative environment that encourages innovation and problem-solving, leading to the success of several projects related to welding technologies.
Conclusion
Hirohisa Segawa's dedication to improving arc welding technology through his inventions demonstrates his commitment to innovation. With a total of eight patents, his work continues to influence welding practices, showcasing the importance of inventive thinking in enhancing industrial processes.