[논문]A Study on the Surface Roughness of Aluminum Alloy for Heat Exchanger Using Ball End Milling

Chung, Han-Shik; Lee, Eun-Ju; Jeong, Hyo-Min; Kim, Hwa-Jeong

doi:10.9726/kspse.2015.19.1.064

[국내논문] A Study on the Surface Roughness of Aluminum Alloy for Heat Exchanger Using Ball End Milling 원문보기

한국동력기계공학회지 = Journal of the korean society for power system engineering, v.19 no.1, 2015년, pp.64 - 69

Chung, Han-Shik (Department of Energy and Mechanical Engineering, Gyeongsang National University) , Lee, Eun-Ju (Department of Energy and Mechanical Engineering, Gyeongsang National University) , Jeong, Hyo-Min (Department of Energy and Mechanical Engineering, Gyeongsang National University) , Kim, Hwa-Jeong (Graduate school, Kyungnam University)

Abstract ▼ AI-Helper

Aluminum alloy is a material with a high strength-weight ratio and excellent thermal conductivity. It neither readily corrodes nor quickly weakens at low temperatures, but can be easily recycled. Because of these features, aluminum heat exchangers are widely used in aluminum alloy. In addition, the aluminum alloy used in other areas is expected to gradually increase. As a result, researchers have been continuously studying the cutting patterns of aluminium alloy. However, such studies are fewer than those on the cutting patterns of ordinary steel. Moreover, the research on ball endmilling with aluminium alloys has not received much attention. Therefore, in this study, an attempt was made to find the optimal cutting pattern among the seven cutting patterns for the machining of the commonly used aluminum alloy using ball endmilling for a heat exchanger. The optimal pattern was found by comparing the different shapes and surface roughness values produced by the seven patterns.

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문제 정의

One is the increase in the machining efficiency, and the other is the increase in the machining precision. This study considered the machining precision. The cutting patterns that had outstanding surface roughness were the radial zig and the radial zigzag.

가설 설정

The question of which cutting pattern is efficient needs to be answered based on the condition of the production requirements, considering the entire process. Studies on the development of a cutting pattern that can simultaneously satisfy the conflicting requirements of machining efficiency and machining precision are expected to be continuously performed.

제안 방법

This study aims to find the optimal cutting pattern for the machining of aluminum alloy using a ball end mill by machining the alloy through the generation of different tool paths based on the seven cutting patterns shown in Figure 2 and by comparing the shapes and surface roughness values of the machined surfaces.
In this study, an experiment was conducted to determine the optimal cutting pattern for the machining of aluminum alloy using a ball end mill, by machining the alloy through the generation of tool paths based on different cutting patterns and by comparing the shapes and surface roughness values of the machined surfaces.

대상 데이터

The surface roughness measuring device used in this experiment was model Surfcoder-F3500D (Kosaka Laboratory Corporation).
The specimen used in this experiment had a 70x70x19mm free-form surface shape. In the rough machining, a flat end mill was used, and 0.

성능/효과

1) The measurement of the flat‐part surface roughness for each cutting pattern indicated that the radial zig cutting pattern, which applied the zig pattern as a linear cutting pattern that extended from an optimal center point, showed the best machined surface, with a center line average roughness (Ra) of 1.32 µm.
2) The measurement of the curved part shape for each cutting pattern indicated that the radial zigzag cutting pattern, which applied the zigzag pattern as a linear cutting pattern that extended from an optimal center point, showed the best shape, with a concave part shape error of +0.11 mm.

참고문헌 (12)

E. K. Henriksen, 1975, "Chip Breaking-A study of Three Dimensional Chip Flow", ASME, Vol. 9, pp 53-59.
K. Nakayama, 1972, "Chip Form Geometry and Chip Control", JSPE, Vol. 38, No. 12, pp. 1070-1076.
Y. G. Kwon, 2000, "A study on the upward and downward cutting characteristics in the cutting of inclination plane using the ball end-mill", Graduate School of Industry, Chungnam National University, M.S. Thesis, pp. 1-2.
C. Y. Jo, 2009, "Hemispheric Cutting-edge Optimization of a Ball End Mill for High-speed Machining", Graduate School, Chonbuk National University, Ph.D. Thesis, pp. 11-13.
W. H. Lee, 2012, "A Study on the Ball End Mill Cutting Force for Inclined Surface Angles Using CAM/FEM", Graduate School, Dong-A University, M.S. Thesis, pp. 8-10.
Y. J. Park, 1999, "Evaluation of the Machinability of High-speed Ball End Milling on a Free-form Surface", Journal of the Korean Society of Mechanical Engineers, pp. 66-70.
J. S. Kim, 2000, "Optimization of the Cutting Condition in the High-speed Machining of a Sculptured Surface Using a Ball End Mill", Graduate School, Pusan National University, M.S. Thesis, pp. 21.
Rundaoz, 2011, "Study on Non-linear Regression Analysis of the Working Conditions of Aluminium Alloy Using End Milling", Graduate School, Dong-A University, M.S. Thesis, pp. 20-39.
J. G. Lee and J. D. Lee, 2008, "Precision Measurement Engineering, Kijeon Publishing", pp. 327-353.
M. J. Park and K. Kim, 1998, "Effects of the tool path on the geometric characteristics of milled surface", Journal of the Korean Society for Precision Engineering, Vol.15, No.6, pp.58-63.
K. Y. Lee, 2008, "Improvement of Cutting Performance of DLC Coated WC against Alloy", Journal of the KSPSE, Vol. 12, No. 3, pp. 66-71.
J. S. Chung, J. U. Jun and M. K. Ha, 2002, "Development of Cutting Tool in Non-ferrous Metals at Turning", Journal of the KSPSE, Vol. 6, No. 1, pp. 82-87.

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[국내논문] A Study on the Surface Roughness of Aluminum Alloy for Heat Exchanger Using Ball End Milling 원문보기

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[국내논문] A Study on the Surface Roughness of Aluminum Alloy for Heat Exchanger Using Ball End Milling 원문보기

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