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Title :トライボ圧縮静水圧による局所的材料硬化を活用した高品位切削法の新開発
Title alternative :Development of a novel high-integrity cutting method by use of localized materials hardening due to tribo-compressive hydrostatic stress
Authors :清水, 淳
Authors alternative :Shimizu, Jun
Issue Date :15-Jun-2018
Abstract :研究成果の概要(和文):精密機械加工において,加工表面品位の向上は重要である.本研究は,切削点近傍に局所的に圧縮静水圧を導入し余分な塑性変形を低減させつつ加工することで加工表面品位を向上させる切削工具の開発と,それによる切削機構の解明を目的としている.切削機構の解明のため,まずすべり要素を付与した切削工具を開発し,アルミニウムを対象に切削の分子動力学シミュレーションを試みた.その結果,切削溝両肩部のバリの顕著な低減が確認された.続いて,すべりと転がり要素による2種の工具を実開発し,純アルミニウムを対象に切削実験した.その結果,シミュレーションと類似した傾向が確認され,とりわけ転がり要素による優位性が明らかにされた. 研究成果の概要(英文):Improving machined surface integrity is important in the precision machining. This study aims to develop a cutting tool which enables to generate a localized compressive hydrostatic stress field around the cutting point to improve the machined surface integrity by reducing unnecessary plastic deformation, and to clarify its cutting mechanism. To clarify the mechanism, a molecular dynamics simulation was conducted on an aluminum workpiece using a developed cutting tool equipped with a sliding element for giving compressive hydrostatic stress to the cutting point. As a result, remarkable reduction in burr formation around the cutting groove shoulders was successfully confirmed. Subsequently, two different cutting tools with a sliding and a rolling elements were practically developed and some cutting experiments were conducted on a pure aluminum. As a result, similar trends as the simulation results were also confirmed, particularly,the advantages in the rolling element was clarified.
Type Local :科研等報告書
Publisher :茨城大学
URI :http://hdl.handle.net/10109/13995
Appears in Collections:Grants-in-aid for scientific research Report (College of Engineering)

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