Kino Haruki, Imada Takumi, Ogawa Keiji, Nakagawa Heisaburo, Kojima Hitomi
MOLDINO Tool Engineering Ltd., Hulic Ryogoku Building 8F, 4-31-11, Ryogoku, Sumida-ku, 130-0026 Tokyo, Japan.
Industrial Research Center of Shiga Prefecture, 232 Kamitoyama, Ritto, 520-3004 Shiga, Japan.
Materials (Basel). 2020 Oct 23;13(21):4745. doi: 10.3390/ma13214745.
The importance of micromachining using small diameter end mills and the dies used for them has been increasing in the machining of small parts. However, the reality is that there are various requirements to improve the machining surface, machining accuracy, machining efficiency, and tool life. Therefore, this paper discusses the possibility of satisfying these requirements by high-speed up cut milling in side cutting. The goal of this study was to solve the aforementioned problems, by conducting a detailed analysis of the machining phenomena in order to understand their mechanisms. In particular, the effects of high-speed cutting using a high-speed air-turbine spindle with highly stiff rolling bearings were analyzed. Moreover, cutting experiments were conducted by measuring the cutting force and flank wear of the tool, to reveal the differences in the cutting phenomena relative to the cutting direction in high-speed micro end milling. Description of the machined surface and the measurement of its profile were also included in the discussions. On the basis of the results, high-speed up cut milling is a better choice than down cut milling; furthermore, a high-feed rate further increases machining efficiency and improves tool life.
在小零件加工中，使用小直径立铣刀进行微加工及其所用模具的重要性日益增加。然而，实际情况是，在改善加工表面、加工精度、加工效率和刀具寿命方面存在各种要求。因此，本文探讨了通过侧铣中的高速顺铣来满足这些要求的可能性。本研究的目标是通过对加工现象进行详细分析以了解其机理，从而解决上述问题。特别是，分析了使用带有高刚度滚动轴承的高速气涡轮主轴进行高速切削的效果。此外，通过测量刀具的切削力和后刀面磨损进行切削实验，以揭示高速微端铣削中相对于切削方向的切削现象差异。讨论中还包括对加工表面的描述及其轮廓测量。基于这些结果，高速顺铣比逆铣是更好的选择；此外，高进给率进一步提高了加工效率并改善了刀具寿命。
