振動外周刃切断方式の加工特性に関する研究: 振動による外周刃ブレードの原点復帰効果に関する有限要素解析と実験検証

摘要

It is known that vibratory OD-blade slicing, which involves the application of a low-frequency vibration to an OD-blade or a workpiece, exhibits the self-corrective effect of the OD-blade owing to the intermittent repetition of contact and separation between the OD-blade and the workpiece. Moreover, in our previous study, we investigated the mechanism of the self-corrective effect using dynamic numerical simulation, and it was shown that this effect can reduce the blade elastic deformation during slicing and the waviness of the sliced surface. In this paper, we discuss this effect using finite element method (FEM) simulation, and show the dynamical results of blade elastic deformation during vibratory slicing. Furthermore, in this paper, we describe slicing accuracy characteristics, such as the waviness, roughness and sawing marks of the sliced surface obtained experimentally. It is found that the waviness and generation rate of sawing marks on the sliced surface in vibratory slicing are not only reduced compared with those in non-vibratory slicing owing to the OD-blade self-corrective effect brought about by vibration, but also the roughness distribution is not changed between non-vibratory and vibratory slicing, on the basis of a series of experimental and FEM simulation analyses.%近年の産業分野において，セラミックスや液晶ガラスに代表される硬脆材料の使用量は年々増大しており，さらにこれらの需要が高まる傾向にある．それに伴って，現在，硬脆材料を素材から切り出す1次加工に位置付けられる切断加工技術の向上が求められている．そのような潮流の中にあって，著者らは外周刃切断方式の高精度化・高能率化を可能にすることを目的として，図1に示すように，振動を効果的に用いる振動切断方式を創案し，実験的，並びに理論的な検討を行ってきた