Study on Micro Mill-Grinding Technology

2013 ◽  
Vol 390 ◽  
pp. 586-590 ◽  
Author(s):  
Chao Wang ◽  
Ya Dong Gong ◽  
Guo Qiang Yin ◽  
Xue Long Wen ◽  
Jun Cheng
Keyword(s):  
Surface Roughness ◽  
Abrasive Particle ◽  
Three Dimensional ◽  
Micro Milling ◽  
Mechanical Processing ◽  
Micro Machining ◽  
Micro Scale ◽  
Abrasive Grains ◽  
Machining System ◽  
Spraying Method

Micro mechanical processing is the effective method for machining micro scale parts. Micro mill-grinding technology is presented based on micro milling and micro grinding processes. The machining principle of micro mill-grinding is studied, and compound tools for micro mill-grinding are fabricated based on spraying technology. Experiments are performed on Al 6061-T6 with the three-dimensional micro machining system. The results show that submicron surface roughness can be obtained by micro mill-grinding. Abrasive grains of mill-grinding tools fabricated by spraying method shed easily. Smaller abrasive particle size improves the surface quality and increases the tool life.

The Effects of Cutting Parameters to the Surface Roughness in High Speed Cutting of Micro-Milling Titanium Alloy Ti-6Al-4V

2020 ◽  
Vol 846 ◽  
pp. 133-138
Author(s):  
Gandjar Kiswanto ◽  
Adrian Mandala ◽  
Maulana Azmi ◽  
Tae Jo Ko
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Weight Reduction ◽  
Feed Rate ◽  
High Speed ◽  
Cutting Parameters ◽  
Micro Milling ◽  
Depth Of Cut ◽  
High Speed Cutting ◽  
Micro Scale

Micro-milling offers high flexibility by producing complex 3D micro-scale products. Weight reduction are one of the optimizations of the product that can make it stronger and more efficient nowadays. Titanium are the most commonly used for micro-scale products especially in biomedical industries because of the biocompatibility properties. Titanium alloys offers high strength with low density and high corrosion resistance that is suitable for weight reduction. This study aims to investigate the influence of high speed cutting parameters to the surface roughness in micromilling of titanium alloy Ti-6Al-4V as high speed cutting offers more productivity since producing more cutting length in the same time. experiments are carried out by micromilling process with variations in high speed cutting parameters of spindle speed and feed rate with a constant depth of cut using a carbide cutting tool of with a diameter of 1 mm. The machining results in the form of a 4 mm slot with a depth as the same as depth of cut, which then measures its surface roughness. It was found that higher feed rate that is followed by higher spindle speed will produce better surface roughness.

scholarly journals Precision Machining with Micro-Scale Vertical Machining Center

2006 ◽  
Vol 10 (2) ◽  
pp. 187-195 ◽  
Author(s):  
Daniel J. Cox ◽  
◽  
Glynn Newby ◽  
Hyung Wook Park ◽  
Steven Y. Liang ◽  
...  
Keyword(s):  
Machine Tools ◽  
Three Dimensional ◽  
Machining Process ◽  
Precision Machining ◽  
Micro Machining ◽  
Feature Size ◽  
Micro Scale ◽  
Machining Center ◽  
Geometrical Complexity ◽  
Machine Stiffness

Micro machining is an emerging technology with extremely large benefits and equally great challenges. The push to develop processes and tools capable of micro scale fabrication results from the widespread drive to reduce part and feature size in many industrial and commercial sectors. For many micro machining applications, the technology of mechanical solid tool machining offers attractive merits as it can create truly three-dimensional and one-of-a-kind parts of extremely high resolutions without significant limitation of part materials. For mechanical solid tool machining, the control of three-dimensional motions between machines, tools, and parts to sub-micron level of precision is a perquisite to the realization of manufacturing at such fine scales. One important factor that contributes to the machining process accuracy is the overall size of the machine tool due to the effects of thermal, static, and dynamic stabilities. This paper will assess the technological benefits of miniaturization of machine tools in the context of machine stiffness and accuracy. It also presents the design philosophy and configuration of a 4-axis miniaturized vertical machining center of positioning accuracy of 4 to 10nm and a machine volumetric envelop less than (300mm)3, which is several thousand times smaller than traditional machining centers. A series of tests are discussed for performance evaluation of the miniaturized machining center in terms of the achievable finish and part form accuracy with respect to the process parameters and part geometrical complexity in 1-D, 2-D, and 3-D cases.

scholarly journals Dimensional capability of selected 3DP technologies

2019 ◽  
Vol 25 (5) ◽  
pp. 915-924 ◽  
Author(s):  
Younss Ait Mou ◽  
Muammer Koc
Keyword(s):  
Surface Roughness ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Digital Measurement ◽  
Content Type ◽  
Micro Scale ◽  
Fused Deposition ◽  
Manufacturing Technologies ◽  
The Right

Purpose This paper aims to report on the findings of an investigation to compare three different three-dimensional printing (3DP) or additive manufacturing technologies [i.e. fused deposition modeling (FDM), stereolithography (SLA) and material jetting (MJ)] and four different equipment (FDM, SLA, MJP 2600 and Object 260) in terms of their dimensional process capability (dimensional accuracy and surface roughness). It provides a comprehensive and comparative understanding about the level of attainable dimensional accuracy, repeatability and surface roughness of commonly used 3DP technologies. It is expected that these findings will help other researchers and industrialists in choosing the right technology and equipment for a given 3DP application. Design/methodology/approach A benchmark model of 5 × 5 cm with several common and challenging features, such as around protrusion and hole, flat surface, micro-scale ribs and micro-scale long channels was designed and printed repeatedly using four different equipment of three different 3DP technologies. The dimensional accuracy of the printed models was measured using non-contact digital measurement methods. The surface roughness was evaluated using a digital profilometer. Finally, the surface quality and edge sharpness were evaluated under a reflected light ZEISS microscope with a 50× magnification objective. Findings The results show that FDM technology with the used equipment results in a rough surface and loose dimensional accuracy. The SLA printer produced a smoother surface, but resulted in the distortion of thin features (<1 mm). MJ printers, on the other hand, produced comparable surface roughness and dimensional accuracy. However, ProJet MJP 3600 produced sharper edges when compared to the Objet 260 that produced round edges. Originality/value This paper, for the first time, provides a comprehensive comparison of three different commonly used 3DP technologies in terms of their dimensional capability and surface roughness without farther post-processing. Thus, it offers a reliable guideline for design consideration and printer selection based on the target application.

scholarly journals In-situ worn geometry effect over the surface roughness propagation during micro milling process

2020 ◽  
Vol 4 (1) ◽  
pp. 1-7
Author(s):  
Nurul Farhana Mohadzir ◽  
Ainur Munira Rosli ◽  
Ahmad Shahir Jamaludin ◽  
Mohd Nizar Md Razali
Keyword(s):  
Surface Roughness ◽  
Mild Steel ◽  
Milling Process ◽  
Machining Process ◽  
Micro Milling ◽  
Micro Machining ◽  
Cnc Milling ◽  
Machined Surface ◽  
Radial Depth ◽  
Micro Tools

High-precision miniaturized components for micro-machining operations has an increasingly demand for numerous developing sectors such as medical instrumentations, electronics components, computer manufacturing, aerospace and automotive engineering. Micro-milling has known as a flexible micro machining process and the most familiar micro mechanical machining method. Due to overcome a few difficulties in micro fabrication, micro milling is picked as an alternative way as it has potential and imperative for high accuracy machining. However, micro tools have low tool life as it is unpredictably and wear quickly. Furthermore, it also has tendency to break easily due to its micro size dimension. The study observe the behaviour of micro milling worn geometry during machining and includes a non-conventional method to measure surface roughness resulted by micro milling process in machining of mild steel AISI1045. The workpiece is prepared by using CNC milling machine with facing and slotting process. Then, the mild steel AISI1045 will undergo a machining process by a 1 mm size end mill diameter with different set of parameters which are spindle speed, feed rate, radial depth and axial depth. Lastly, for the results, the surface roughness of the machined surface will be observed and the condition of tool and the measurement of wear for the tool will be investigated.

Research on Micro-Grinding Method and Surface Quality

2011 ◽  
Vol 487 ◽  
pp. 6-10
Author(s):  
Ya Dong Gong ◽  
Yue Ming Liu ◽  
Jun Cheng ◽  
J.F. Zhang
Keyword(s):  
Surface Quality ◽  
Geometrical Model ◽  
Micro Milling ◽  
Micro Machining ◽  
Test Bed ◽  
Speed Reduction ◽  
Grinding Method ◽  
Machining System ◽  
Machining Test ◽  
Conventional Grinding

Grinding characteristics brought by the grinding speed reduction and geometrical model differences between micro-grinding and conventional grinding have been mainly researched. Influences which micro-grinding parameter and micro-grinding tool dimension parameter giving to grinding surface quality have been analyzed. The comparison experiment between micro-grinding and micro-milling has been carried out on the micro-machining test-bed developed by Northeast University. Wear of the grinding pin obtained from experiment is considered to provide the basis for the micro-machining system and fabricating of grinding pins.

Assessment of the Three-Dimensional Surface Roughness Parameters

2013 ◽  
Vol 274 ◽  
pp. 174-178 ◽  
Author(s):  
Bo Liu ◽  
Hai Yin Yu ◽  
Fan Ye ◽  
Jian Ying Guo
Keyword(s):  
Surface Roughness ◽  
Measurement Accuracy ◽  
Three Dimensional ◽  
Mechanical Processing ◽  
Roughness Parameters ◽  
Surface Roughness Parameters ◽  
3D Surface Roughness ◽  
Improve Measurement ◽  
Roughness Assessment ◽  
Automatic Level

With the improvement of mechanical processing automatic level, the measurement of the surface roughness requires the ever-increasing demands, including the improvement of measurement methods, improve measurement accuracy and roughness parameters assessed. Around these requirements, this paper is the research to 3D surface roughness parameters, gives the method to determine the datum and 3D roughness assessment parameters.

Recent Developments in Desktop-Sized Machine Tools

2017 ◽  
Vol 261 ◽  
pp. 425-431 ◽  
Author(s):  
Jan C. Aurich ◽  
Christopher Müller ◽  
Martin Bohley ◽  
Peter Arrabiyeh ◽  
Benjamin Kirsch
Keyword(s):  
Surface Roughness ◽  
Machine Tools ◽  
Micro Milling ◽  
Bottom Surface ◽  
Manufacturing Processes ◽  
Micro Machining ◽  
Machining Quality ◽  
Recent Developments ◽  
Micro Structures ◽  
Micro Tools

The miniaturization of components and the functionalization via micro structures demands for flexible and economic manufacturing processes. Micro machining, i.e. micro milling and micro grinding can meet these requirements. In this paper, desktop-sized machine tools and their components that were developed at our institute are presented. With those machine tools, micro tools can be machined and used in one clamping, allowing for increased machining quality. Grooves milled with such machine tools achieve a bottom surface roughness below 10 nanometer.

Effects of Tool Nose Corner Radius and Main Cutting-Edge Radius on Cutting Temperature in Micro-Milling Inconel 718 Process

2017 ◽  
Author(s):  
Xiaohong Lu ◽  
Hua Wang ◽  
Zhenyuan Jia ◽  
Likun Si ◽  
Steven Y. Liang
Keyword(s):  
Three Dimensional ◽  
Cutting Temperature ◽  
Milling Process ◽  
Cutting Edge ◽  
Micro Milling ◽  
Milling Cutter ◽  
Micro Scale ◽  
Cutting Edge Radius ◽  
Corner Radius ◽  
Edge Radius

Cutting temperature plays an important role in micro-scale cutting process because the dimension of the micro-milling cutter is relatively small and the wear of micro-milling cutter is sensitive to temperature. Considering the sidewall of a groove is formed by main cutting edge of the tool, and the bottom of a groove is formed by tool tip and the edge on the end of the tool. Therefore, effects of tool nose corner radius and main cutting edge radius on cutting temperature in micro-milling process cannot be ignored. However, few studies have been conducted on this issue. The effects of tool nose corner radius and main cutting edge radius on cutting temperature is investigated. A three-dimensional micro-milling Inconel718 model is established by using the software DEFORM3D. And the influence of tool nose corner radius and main cutting edge radius on the size and distribution of cutting temperature are studied by numerical simulation, which is verified by experiments. The work provide reference for the control of the size and distribution of the cutting temperature during micro-milling process.

Enhancement of Heat Transfer Performance in Nuclear Fuel Rod Using Nanofluids and Surface Roughness Technique

2015 ◽  
Author(s):  
Kang Liu ◽  
Titan C. Paul ◽  
Leo A. Carrilho ◽  
Jamil A. Khan
Keyword(s):  
Heat Transfer ◽  
Surface Roughness ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Nuclear Fuel ◽  
Three Dimensional ◽  
Pressurized Water ◽  
Bulk Fluid ◽  
Fuel Rod ◽  
Dimensional Surface

The experimental investigations were carried out of a pressurized water nuclear reactor (PWR) with enhanced surface using different concentration (0.5 and 2.0 vol%) of ZnO/DI-water based nanofluids as a coolant. The experimental setup consisted of a flow loop with a nuclear fuel rod section that was heated by electrical current. The fuel rod surfaces were termed as two-dimensional surface roughness (square transverse ribbed surface) and three-dimensional surface roughness (diamond shaped blocks). The variation in temperature of nuclear fuel rod was measured along the length of a specified section. Heat transfer coefficient was calculated by measuring heat flux and temperature differences between surface and bulk fluid. The experimental results of nanofluids were compared with the coolant as a DI-water data. The maximum heat transfer coefficient enhancement was achieved 33% at Re = 1.15 × 105 for fuel rod with three-dimensional surface roughness using 2.0 vol% nanofluids compared to DI-water.

scholarly journals Stretchable micro-scale concentrator photovoltaic module with 15.4% efficiency for three-dimensional curved surfaces

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Daisuke Sato ◽  
Taizo Masuda ◽  
Kenji Araki ◽  
Masafumi Yamaguchi ◽  
Kenichi Okumura ◽  
...  
Keyword(s):  
Concentration Ratio ◽  
Power Conversion ◽  
Three Dimensional ◽  
Thin Film Solar Cells ◽  
Photovoltaic Module ◽  
Silicon Compound ◽  
Curved Surfaces ◽  
Power Sources ◽  
Micro Scale ◽  
Module Design

AbstractStretchable photovoltaics are emerging power sources for collapsible electronics, biomedical devices, and buildings and vehicles with curved surfaces. Development of stretchable photovoltaics are crucial to achieve rapid growth of the future photovoltaic market. However, owing to their rigidity, existing thin-film solar cells based predominantly on silicon, compound semiconductors, and perovskites are difficult to apply to 3D curved surfaces, which are potential real-world candidates. Herein, we present a stretchable micro-scale concentrator photovoltaic module with a geometrical concentration ratio of 3.5×. When perfectly fitted on a 3D curved surface with a sharp curvature, the prototype module achieves an outdoor power conversion efficiency of 15.4% and the daily generated electricity yield improves to a maximum of 190% relative to a non-concentration stretchable photovoltaic module. Thus, this module design enables high areal coverage on 3D curved surfaces, while generating a higher electricity yield in a limited installation area.

Sign in / Sign up

Export Citation Format

Share Document