Hirohiko Arai

Title: Hirohiko Arai: Innovator in Metal Spinning Technology

Introduction

Hirohiko Arai is a notable inventor based in Tsukuba, Japan. He has made significant contributions to the field of metal spinning, holding a total of seven patents. His innovative approaches have advanced the capabilities of metal forming processes, particularly for non-circular cross sections.

Latest Patents

Among his latest patents is a "Metal Spinning Method and Apparatus." This invention provides a method and apparatus for performing metal spinning operations that can create products with non-circular cross sections, such as polygonal or elliptic shapes. The system utilizes feedback signals from a force sensor attached to the forming roller to control the pushing force, ensuring that the workpiece conforms to the mandrel's shape. Additionally, the motion of the forming roller is recorded, allowing for precise control of the mandrel's rotational speed during the forming operation.

Another significant patent is the "Spinning Method and Apparatus," which allows for high responsiveness in controlling the pressing force of a roller tool. This invention enables the roller tool to adapt to varying radial lengths of the forming die while maintaining the desired contour of the workpiece. The apparatus employs at least two intersecting linear motors to adjust the thrust generated by each motor, thereby controlling the feeding displacement and pressing force of the roller tool.

Career Highlights

Hirohiko Arai has worked with the Japan Agency of Industrial Science and Technology, contributing to advancements in industrial technology. His expertise in metal spinning has positioned him as a key figure in the development of innovative manufacturing processes.

Collaborations

Throughout his career, Arai has collaborated with notable colleagues such as Kazuo Tanie and Yasuo Hayashibara. Their combined efforts have furthered research and development in the field of metal forming technologies.

Conclusion

Hirohiko Arai's contributions to metal spinning technology exemplify his innovative spirit and dedication to advancing manufacturing processes. His patents reflect a deep understanding of engineering principles and a commitment to improving industrial practices.