• Title/Summary/Keyword: Fluid Cutting

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Correlation analysis between cutting conditions and cylindricity in MQL turning (MQL 선삭가공에서 절삭조건과 원통도의 상관관계 분석)

  • Shin, Sung-Woo;Hwang, Young-Kug;Lee, Choon-Man
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.8 no.3
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    • pp.74-81
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    • 2009
  • At present, industries and researchers are looking for ways to reduce the use of lubricants because of ecological and economical reasons. Therefore, metal cutting is to move toward dry cutting or semi-dry cutting. One of the technologies is known as MQL machining. This paper presents an investigation into MQL machining with the objective of evaluating cylindricity and cooling effect for the turning process of SM45C. To reach this goal, cylindrical-outer-diameter turning experiments are carried out according to cutting conditions with fluid, MQL and dry machining methods. A cutting force, tool-shank temperature and cylindricity of workpiece are measured and analyzed. The correlation between cutting conditions and cylindricity are evaluated according to cooling lubricant environments.

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Evaluation of Wet Machining Characteristics of the Presintered Low Purity Alumina with the Ceramic, CBN and Diamond Tools (저순도 알루미나 예비소결체의 절삭유제에 따른 세라믹, CBN, 다이아몬드공구의 가공 특성 평가)

  • Lee, Jae-Woo
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.2 s.191
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    • pp.33-40
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    • 2007
  • In this study, presintered and full sintered low purity alumina ceramics were machined with various tools to clarify the effect of cutting fluid in machinability. The main conclusions obtained were as follows. When the presintered ceramics were wet machined with sintered diamond tool, the tool wear becomes extremely large, and higher cutting speed can be used than in the case of full sintered ceramics. The productivity of wet cutting with the sintered diamond tool is much higher than that of dry cutting. In the case of the CBN and ceramic tools, the tool wear were smaller at wet cutting than at dry cutting, especially exhibiting considerably larger grooved tool wear in wet cutting with ceramic tool.

A Study of the Effectives for Surface Roughness by Cutting Angle and Cutting Fluid (절삭공구와 절삭유가 가공부위 표면거칠기에 미치는 영향에 관한 연구)

  • Choi, Sung-Yun;Kwon, Dae Kyu
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.1
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    • pp.57-62
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    • 2018
  • In this report, Cutting of metals are basically existence of fundamentally important cutting method. It is necessary task for the advanced technical production which are need more precision and efficient to over an idealistic surface roughness. This study is resulted through cutting the row materials of SM45C, in the diluted solubility water type of cutting fluids twenty times and forty times as many as that water, by variable in the velocity, feed rate, depth of cut, comparing the examine under same cutting conditions.

A Study on the Establishment of Proper Metalworking Fluids Supply Method to Reduce the amount Used (절삭유 사용량의 억제를 위한 적절한 공급 방식의 설정을 위한 연구)

  • 강재훈;송준엽;송철원;최종호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1803-1806
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    • 2003
  • Metalworking fluids (MWFs) are fluids used during machining and grinding to prolong the lift of the tool, carry away debris, and protect the surfaces of work pieces. These fluids reduce friction between the cutting tool and the work surface. reduce wear and galling, protect surface characteristics, reduce surface adhesion or welding and carry away generated heat. Workers can be exposed to MWFs by inhaling aerosols (mists) and by skin contact with the fluid. Skin contact occurs by dipping the hands into the fluid, splashes, or handling workpieces coated with the fluids. The amount of mist generated (and the resulting level of exposure) depends on many factors. To reduce the environmental pollution wastes and the potential health risks associated with occupational exposures to MWFs, it is required to establish optimum MWFs supply method and condition with minimum quantity in all over the mechanical machining field including high-speed type heavy cutting process.

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A Study on the Surface Roughness Using the Design of Experiment in Turning Process (선반작업에서 실험계획법을 이용한 표면 거칠기에 관한 연구)

  • 홍민성
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2000.04a
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    • pp.519-524
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    • 2000
  • This paper presents a study of surface roughness prediction model by experimental design in turning operation. Regression analysis technique has been used to study the effects of the cutting parameters such as cutting speed, feed and depth of cut on surface roughness. The experiment has been conducted using coated tungsten carbide inserts without cutting fluid. The reliability of the surface roughness model as a function of the cutting parameters has been estimated. The results show that the experimental design used in cutting process is a method to estimate the effects of cutting parameter on surface roughness.

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Drilling Properties of Water-Based Metal Working Fluid Containing Fatty Acid and Polyethylene Glycol (지방산과 폴리에틸렌글리콜의 혼합에 따른 수용성 절삭유제의 절삭특성)

  • Kim, Yeong-Un;Jeong, Geun-U;Yun, Yu-Jeong;Kim, Se-Hun;Gang, Seok-Chun
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.2
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    • pp.161-170
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    • 2001
  • Synthetic water-based metal-cutting fluids are increasingly popular in the metal-working industry because of its environmental friendliness. The propose of this study is to investigate the synergistic effect of combining polyethylene glycol and common fatty acid in formulating a metal-cutting fluid. The tested metals were aluminum, copper and steel, and the test was performed with a modified drilling machine. From the study, it was found that there existed some synergistic effects on the drilling efficiency of the metals to decrease of cutting time, cutting energy, torque as well as the smoothness of surface depended on the formulation ratio of the two fluids.

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Tool Wear of the Tungsten Carbide Tipped Circular Saw (초경팁 납접형 둥근톱의 공구 마멸)

  • Lee, Jae-Woo
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.2
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    • pp.228-236
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    • 2002
  • In this study, the carbon steels, SM20C were machined with the tungsten carbide tipped circular saw to clarify the cutting-off characteristics in terms of tool wear. The results show that an improved performance in view of both the tool wear and the cutting efficiency was obtained by using oil base cutting fluid at the cutting speed of 100m/min with the feed of 0.06mm/tooth. The rake angle of 10$^{\circ}$ , clearance angle of 8$^{\circ}$ , nose radius of R0.1mm, and end cutting edge champer of 0.1mm$\times$25$^{\circ}$ are believed as the best tool geometries. The tool wear decreases due to using the saw of the disk of STS5 and the tool material of P30.

The Optimization Analysis for the Selection of Cutting Parameters in Turning Operation

  • Hong, Min-Sung;Lian, Zhe-Man
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.3
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    • pp.97-103
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    • 2001
  • This paper has focused on the Optimization of the cutting parameters for urning operation based on the Taguchi method. Four cutting parameters. nemely, cutting speed, feed depth of cut and nose radius are optimized with consideration of the surface roughness. The design and analysis of experiments are conducted to study the performance characteristic. The effects of these parameters on the surface roughness have been investigated using signal-to-noise(S/N) ratio and analy-sis of variance(ANOVA). The experiments have been performed using coated tungsten carbide inserts without any cutting fluid. Experimental results illustrate the effectiveness of this approach.

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