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用于硬质合金中高纵横比微孔加工的侧面切割微型刀具桌面式微电火花加工系统

Desktop Micro-EDM System for High-Aspect Ratio Micro-Hole Drilling in Tungsten Cemented Carbide by Cut-Side Micro-Tool.

作者信息

Wu Yung-Yi, Huang Tzu-Wei, Sheu Dong-Yea

机构信息

Graduate Institute of Mechanical & Electrical Engineering, CMEE, National Taipei University of Technology, Taipei 10608, Taiwan.

Graduate Institute of Manufacturing Technology, CMEE, National Taipei University of Technology, Taipei 10608, Taiwan.

出版信息

Micromachines (Basel). 2020 Jul 11;11(7):675. doi: 10.3390/mi11070675.

DOI:10.3390/mi11070675
PMID:32664487
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7408544/
Abstract

Tungsten cemented carbide (WC-Co) is a widely applied material in micro-hole drilling, such as in suction nozzles, injection nozzles, and wire drawing dies, owing to its high wear resistance and hardness. Since the development of wire-electro-discharge grinding (WEDG) technology, the micro-electrical discharge machining (micro-EDM) has been excellent in the process of fabricating micro-holes in WC-Co material. Even though high-quality micro-holes can be drilled by micro-EDM, it is still limited in large-scale production, due to the electrode tool wear caused during the process. In addition, the high cost of precision micro-EDM is also a limitation for WC-Co micro-hole drilling. This study aimed to develop a low-cost desktop micro-EDM system for fabricating micro-holes in tungsten cemented carbide materials. Taking advantage of commercial micro tools in a desktop micro-EDM system, it is possible to reach half the amount of large-scale production of micro-holes. Meanwhile, it is difficult to drill the deep and high aspect ratio micro-holes using conventional micro-EDM, therefore, a cut-side micro-tool shaped for micro-EDM system drilling was exploited in this study. The results show that micro-holes with a diameter of 0.07 mm and thickness of 1.0 mm could be drilled completely by cut-side micro-tools. The roundness of the holes were approximately 0.001 mm and the aspect ratio was close to 15.

摘要

碳化钨硬质合金（WC-Co）是一种在微孔钻削中广泛应用的材料，例如在吸嘴、注射喷嘴和拉丝模中，这是由于其具有高耐磨性和硬度。自从线切割放电磨削（WEDG）技术发展以来，微放电加工（micro-EDM）在WC-Co材料的微孔制造过程中表现出色。尽管通过微放电加工可以钻出高质量的微孔，但由于加工过程中造成的电极工具磨损，其在大规模生产中仍受到限制。此外，精密微放电加工的高成本也是WC-Co微孔钻削的一个限制因素。本研究旨在开发一种低成本的桌面式微放电加工系统，用于在碳化钨硬质合金材料上制造微孔。利用桌面式微放电加工系统中的商用微型工具，可以达到大规模微孔生产数量的一半。同时，使用传统的微放电加工很难钻出深且高纵横比的微孔，因此，本研究开发了一种用于微放电加工系统钻孔的侧切微型工具。结果表明，使用侧切微型工具可以完全钻出直径为0.07毫米、厚度为1.0毫米的微孔。这些孔的圆度约为0.001毫米，纵横比接近15。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/314876e12a56/micromachines-11-00675-g019.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/2f6e2ec0b14d/micromachines-11-00675-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/ad5d02b18a95/micromachines-11-00675-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/d56010b14908/micromachines-11-00675-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/fdac123e3314/micromachines-11-00675-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/03e956d35f65/micromachines-11-00675-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/282d4ef9468d/micromachines-11-00675-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/d1e8a71f9bee/micromachines-11-00675-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/16e0a84f2072/micromachines-11-00675-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/314876e12a56/micromachines-11-00675-g019.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/f42a806b17a1/micromachines-11-00675-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/4a32c8797705/micromachines-11-00675-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/f495e49a68be/micromachines-11-00675-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/f172da0132f3/micromachines-11-00675-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/f5f966080d79/micromachines-11-00675-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/2a6512cfb569/micromachines-11-00675-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/2f6e2ec0b14d/micromachines-11-00675-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/ad5d02b18a95/micromachines-11-00675-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/d56010b14908/micromachines-11-00675-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/fdac123e3314/micromachines-11-00675-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/03e956d35f65/micromachines-11-00675-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/282d4ef9468d/micromachines-11-00675-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/8d6651c43d43/micromachines-11-00675-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/858eb4af406c/micromachines-11-00675-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/68cb391f1233/micromachines-11-00675-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/c857ad0d9c64/micromachines-11-00675-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/d1e8a71f9bee/micromachines-11-00675-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/16e0a84f2072/micromachines-11-00675-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/868e/7408544/314876e12a56/micromachines-11-00675-g019.jpg

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