Development of discharge surface modification method and metal 3D deposition method using sliding arc plasma

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04189
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Tsukuba University of Technology
• Principal Investigator: Tani Takayuki 筑波技術大学, 産業技術学部, 教授 (80279554)
• Co-Investigator(Kenkyū-buntansha): 丹野 格 筑波技術大学, 産業技術学部, 准教授 (30435391)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 放電加工 / 表面改質 / 走査加工 / パイプ電極 / 細線電極

Outline of Final Research Achievements

In this study, we propose a surface modification method in which high-speed relative motion is applied between the electrode and the workpiece, and the electrode material is transferred to the workpiece by processing while sliding the arc column. Surface modification is achieved by rotating a thin-walled pipe electrode at high speed and selecting a long pulse duration condition. However, there is an issue that the applicable materials are limited because of the pipe shape.Therefore, we attempted to achieve a similar effect by using the relative motion of a thin wire.By applying a circular motion to the thin wire, it became clear that surface modification could be achieved without removing the workpiece, even under conditions where the relative motion speed was slow.

Free Research Field

生産工学

Academic Significance and Societal Importance of the Research Achievements

細線を走査する放電加工によって、放電表面改質が可能となることは、圧粉体などの特別材料を必要としない点において大きなメリットがある。また、タングステンなどの高融点材料の適用も可能となる。これらのことは材料選択や装置構成において非常に有利であり、広く普及した放電加工技術の延長上において使用されることが想定される。よって、汎用性の高い技術となることが期待できる。