Leveraging Technology for a Sustainable World Proceedings of the 19t
The 19th CIRP Conference on Life Cycle Engineering continues a strong tradition of scientific meetings in the areas of sustainability and engineering within the community of the International Academy for Production Engineering (CIRP). The focus of the con
- PDF / 2,483,732 Bytes
- 5 Pages / 595 x 791 pts Page_size
- 95 Downloads / 189 Views
1
1
1
2
Hae-Sung Yoon , Binayak Bhandari , Jong-Seol Moon , Chung-Soo Kim , Gyu-Bong Lee , 3 3,4 1,5, * Kwang Wook Park , Chul-Ki Song , and Sung-Hoon Ahn 1
School of Mechanical and Aerospace Engineering, Seoul National University, Korea 2 Korea Institute of Industrial Technology, Korea 3 School of Mechanical Engineering, Gyeongsang National University, Korea 4 Engineering Research Institute, Gyeongsang National University, Korea 5 Institute of Advanced Machinery and Design, Seoul National University, Korea
Abstract Energy savings are becoming a new focus in the industrial sector because of environmental concerns. In order to establish an energy-saving strategy for micro-drilling, it is necessary to consider all aspects of the drilling procedure, including the post-drilling process. This study analyzed micro-drills with diameters of 400 μm. Process parameters, such as the rotational speed of the spindle and in-feed, were controlled, and the energy consumption of each process was measured. Operators can use the results to make decisions on process parameters and whether to perform a de-burring process. Ultimately, an effective energy-saving strategy can be devised for micro-drilling. Keywords: Energy consumption; Energy cost saving; Life span; Machinability; Micro-drills; Printed circuit board 1
INTRODUCTION
*
400 μm
Energy concerns regarding industry have drawn more attention recently because of the scarcity of resources and pressure from government and customers. Since manufacturing industries account for 37% of the world’s energy consumption [1], it is important for industry to save energy. This study investigated the energy consumption of the micro-drilling process used in the manufacture of printed circuit boards (PCBs). PCBs have thin copper layers on the surface or within them that form the circuit route of electronic devices. Since the manufacture of a PCB usually involves many processes, it is necessary to consider the entire cycle and related processes. Drilling is a major part of conventional machining, and numerous studies have sought to improve the process efficiency and investigate its energy characteristics. As a part of this, Gutowski [2] [2] analyzed the energy consumed in manufacturing machines, and Tönissen [3] studied the energy consumption of precision machines in terms of process parameters. Rangarajan [4] investigated the energy consumption in metal machining in terms of part orientation, and Kong [5] evaluated the tool path in terms of environmental factors. In addition, the scheduling of drilling operations to improve the process efficiency has been studied [6]. This study analyzed micro-drills with diameters of 400 μm, the size used most commonly in industry. To reduce the overall energy consumption in machining, including constant energy and basic runtime consumed energy, it is necessary to consider the overall supply chain or life cycle of a product. The drilling thrust force and electricity usage of the system were measured using a dynamometer and power meter, respectively. The
Data Loading...
