Design and Tests of a Water-Cooling Micro-Channel Heat Sink Made by WEDM

The purpose of this research is to design a new heat sink of water-cooling. With the aid of CAE (computer aided engineering), WEDM (wire electrical discharge machining), and the concept of micro-channel design, a heat sink of water-cooling can then be built with the merit of a smaller volume and lower thermal resistance. From this paper, results of the experiment indicate that the thermal resistance of heat sink can be decreased to 0.12 °C/W with input power of 60W, flow rate of 0.6 LPM, and a better heat dissipation with the in input power of 100W or 140W can be revealed.

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STEP-NC compliant information modelling for wire electrical discharge machining component manufacture

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1243/095440505x32751 ◽

2005 ◽

Vol 219 (10) ◽

pp. 777-784 ◽

Cited By ~ 8

Author(s):

K H Ho ◽

S T Newman ◽

R D Allen

Keyword(s):

Data Model ◽

Electrical Discharge ◽

Electrical Discharge Machining ◽

Database Management System ◽

Numerical Control ◽

Wire Electrical Discharge Machining ◽

Computer Aided Process Planning ◽

Information Models ◽

Computer Aided ◽

Wedm Process

Over the last five years, a great deal of research effort has been concentrated on the development of a new data model ISO 14649, informally known as STEP-NC. It has been strongly argued that STEP-NC has huge implications on the integration of the computer-aided design/computer-aided process planning/computer-aided manufacture (CAD/CAPP/CAM) (CAx) systems, giving the opportunity to realize interoperable computer numerical control (CNC) manufacturing. This is largely owing to the data model, which provides the capability to revolutionize the current state of the art in CNC manufacturing by offering a bi-directional interface with a high-level description of the geometrical and manufacturing information. This paper provides a view of how these STEP-NC compliant information models can be used to support the wire electrical discharge machining (WEDM) CAD to the CNC process chain. The models are based on part 13 of the ISO 14649 standard, which is dedicated to the WEDM process, together with part 10 of the standard, which specifies the general machining information. The information models have been identified and their structures have been defined and modelled using the unified modelling language (UML). A STEP-NC compliant WEDM CAx prototype system, based on the Java and the object-oriented database management system (DBMS) ObjectStore, has been constructed with an example case study to demonstrate the information models.

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A Study of Liquid Cooling Heat Sink Fabrication and Development in Notebook

Materials Science Forum ◽

10.4028/www.scientific.net/msf.505-507.223 ◽

2006 ◽

Vol 505-507 ◽

pp. 223-228

Author(s):

A Cheng Wang ◽

Kuo Zoo Liang ◽

C.C. Liu ◽

C.K. Yang

Keyword(s):

Heat Sink ◽

Electrical Discharge ◽

Heat Dissipation ◽

Electrical Discharge Machining ◽

Liquid Cooling ◽

Working Surface ◽

Erosion Effect ◽

Long Pulse ◽

Cutting Path ◽

Off Time

Liquid cooling heat sink has excellent heat dissipation ability at the personal computer. It can also produce the similar effect at the notebook when the same heat sink is used. However, under the installing space is limited in notebook, the size and weight of heat sink must be limited too. Therefore a novel liquid cooling heat sink was fabricated herein to understand the heat dissipation efficiency in the notebook. Wire electrical discharge machining (WEDM) uses heat erosion effect to remove material and only produces little cutting force on the working surface. Therefore, WEDM has excellent ability to fabricate the straight micro fins (high 1000 μm, width 250 μm, fin gap 400 μm). The WEDM parameters were used to find the precision micro fins in this experiment. The precision micro fins were made when the cutting path offset was 185 μm in WEDM. WEDM would produce over cutting during long pulse duration and it caused oblique micro fins. The appropriate off time in cutting process would promote the WEDM efficiency. However, a liquid cooling heat sink with uniform micro fins and slits was obtained using WEDM.

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Evaluating Material’s Interaction in Wire Electrical Discharge Machining of Stainless Steel (304) for Simultaneous Optimization of Conflicting Responses

Materials ◽

10.3390/ma12121940 ◽

2019 ◽

Vol 12 (12) ◽

pp. 1940 ◽

Cited By ~ 13

Author(s):

Kashif Ishfaq ◽

Naveed Ahmad ◽

Muhammad Jawad ◽

Muhammad Asad Ali ◽

Abdulrahman M. Al-Ahmari

Keyword(s):

Stainless Steel ◽

Thermal Resistance ◽

Electrical Discharge ◽

Electrical Discharge Machining ◽

High Surface ◽

Cutting Speed ◽

Industrial Applications ◽

Simultaneous Optimization ◽

Wire Electrical Discharge Machining ◽

Ss 304

Stainless steel (SS 304) is commonly employed in industrial applications due to its considerable corrosion resistance, thermal resistance, and ductility. Most of its intended applications require the formation of complex profiles, which justify the use of wire electrical discharge machining (WEDM). However, its high thermal resistance imposes a limitation on acquiring adequate surface topography because of the high surface tension of the melt pool, which leads to the formation of spherical modules; ultimately, this compromises the surface quality. Furthermore, the stochastic nature of the process makes it difficult to optimize its performance, especially if more than one conflicting response is involved, such as high cutting speed with low surface roughness and kerf width. Therefore, this study aimed to comprehensively investigate the interaction of SS 304 and WEDM, with a prior focus on simultaneously optimizing all the conflicting responses using the Taguchi-based grey relational approach. Analysis of variance (ANOVA) revealed that the current was the most significant parameter for cutting speed and kerf, whereas roughness, voltage (45%), drum speed (25.8%), and nozzle offset distance (~21%) were major contributing factors. SEM micrographs showed that optimal settings not only ensured simultaneous optimization of the conflicting responses but also reduced the number and size of spherical modules.

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