Research on elucidation and control of machining mechanism of electrochemical composite milling using electrochemical dissolution phenomenon

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K03794
• 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: Shizuoka Institute of Science and Technology
• Principal Investigator: Goto Akihiro 静岡理工科大学, 理工学部, 教授 (00711558)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 電解加工 / ミーリング / 複合加工 / 超硬合金 / コバルト

Outline of Final Research Achievements

So far, we have been developing milling processing combined with electrolytic processing. This method involves dissolving Co, a component of cemented carbide, through electrolysis, and then cutting away the brittle parts that have become brittle due to the dissolution of Co with an insulating cutting edge. This method can increase the machining efficiency, but it is difficult to perform stable, continuous machining. Therefore, we aimed to develop a technology that can perform stable, continuous, highly efficient machining. In order to increase the effect of the electrolytic reaction, we attempted heavy cutting processing, and demonstrated that it is possible to perform machining at a speed more than five times faster than without electrolysis. However, we encountered a problem where cutting chips would clog the tool, making it impossible to continue machining. As a countermeasure, we discovered a method that combines reverse electrolysis and ultrasonic cleaning.

Free Research Field

電気加工

Academic Significance and Societal Importance of the Research Achievements

高精度な部品を大量に製造するために金型材料の超硬合金化が進んできている。しかし、超硬合金はその高い硬さのため、加工が難しいという問題がある。一般的には超硬合金は放電加工により加工されることが多いが、加工速度が遅く、表面にマイクロクラックが入るという問題がある。一方、近年、切削工具の分野で大きな技術進歩があり、超硬合金でも加工することができるようになってきている。しかし、加工速度が遅い上、工具費用が非常に高いという問題がある。本研究により、難加工材料の代表である超硬合金を高速に加工ができるようになり、ものづくりの生産性を高めることにつながる。