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Micro ECM with Ultrasonic Vibrations Using a Semi-cylindrical Tool
Insoon Yang,Min Soo Park,Chong Nam Chu 한국정밀공학회 2009 International Journal of Precision Engineering and Vol.10 No.2
In recentl years, there has been a growing demand for micro holes. However, electrochemical machining has rarely been employed in drilling these holes because of problems with electrolyte diffusion. In this research, a semi-cylindrical tool was used as a tool electrode to increase the flow space of the electrolyte, and electrolyte diffusion was improved via the application of ultrasonic vibrations. Micro holes with a specified diameter of 76 μm were drilled on a 304 stainless steel plate of 300μm thickness. The proposed technique reduced both the machining time and the machining gap.
Appropriate Smart Factory for SMEs: Concept, Application and Perspective
정우균,Dong-Ryul Kim,Hyunsu Lee,Tae Hun Lee,Insoon Yang,Byeng D. Youn,Daniel Zontar,Matthias Brockmann,Christian Brecher,Sung-Hoon Ahn 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.1
In the manufacturing industry, the smart factory is considered the final stage of the Fourth Industrial Revolution. Manufacturing companies are pursuing breakthroughs by introducing various advanced technologies to ensure their competitiveness. However, it is difficult for small and medium-sized enterprises (SMEs) to adopt smart-factory technologies, owing to financial and technical burdens. This paper proposes a smart factory that can be applied technically and strategically to the introduction of a smart factory for SMEs. The concept of an ‘appropriate smart factory’ involves applying appropriate measures in terms of cost and scale with consideration of the situations faced by SMEs. The goal is to build a smart factory that has necessary functions (Essential) but can be easily operated (Simple) at a low cost (Affordable) and has compatibility (Interoperable). This paper presents technical application measures such as appropriate smart sensors, appropriate IoT (Internet of Things), and small data processing, along with the definition of an appropriate smart factory. In addition, a case study was examined where the quality inspection equipment for garment manufacturing SMEs was developed by applying the appropriate smart factory concept.