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http://dx.doi.org/10.14775/ksmpe.2021.20.05.027

A Study on the Characteristics of Chamdrilling for SCM415 Steel  

Kim, Jin-su (College of Computer Application Mechanical, Korea Polytechnic UNIV.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.5, 2021 , pp. 27-34 More about this Journal
Abstract
This study analyzes machining characteristics and presents optimal cutting conditions by measuring the surface roughness, dimensional accuracy, and dimension straightness based on the feed rate after processing the inner diameter hall of SCM415 steel using an automatic CNC(Computerized Numerical Control) lathe. The testing material was cut using an 11.8 mm-diameter Chamdrill after mounting the 32 mm-diameter round bar on an automatic CNC lathe. The cut depth was set at 3 mm, and the cutting speed was fixed at 1500 rpm. The surface roughness, dimensional accuracy, and dimension straightness of 15 testings were measured by changing the feed rate to 0.05, 0.1, and 0.15 mm/rev, respectively. It was difficult to process more than 15 tests during the maching due to noise or break. Additionally, the optimum cutting of SCM415 steel showed excellent surface roughness in the 10th and 11th of testing at cutting speed and feed speed of 1500 rpm and 0.05 mm/rev, respectively. The dimensional accuracy was measured in three dimensions after drilling, which showed good results with an average range of 0.0138-0.0208 mm. Moreover, the lower the feed speed, the higher the accuracy. Additionally, the measurement results of the dimensional straightness showed that the straightness is the straightness was the best at the 1th and 2th cutting regardless of the feed speed.
Keywords
Chamdrill; Surface Roughness; Automatic CNC Lathe; Dimensional Straightness; Dimensional Accuracy; SCM415;
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1 Choi, J. G., Kim, H. S. and Kim, S. C., "A Study on the Optimum Finish Allowance for Machining Accuracy Improvement in the End Milling Processes", Journal of the Korean society of machine tool engineers, Vol. 13, No. 3, pp. 8-14, 2004.
2 Chung, M. S., "A Study on Transition of Dimension Error and Surface Precision in High Speed Machining of AI-alloy", Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 9, No. 3, pp. 96-102, 2000.
3 Choi, C. W., "A Study on Surface Roughness in Circular Pocket Machining of SCM415 Steel", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 18, No. 7, pp. 77-82, 2019.   DOI
4 Kim, M. H., "A Study on Vision Measurement System and Dynamic Signal Analysis for Improving Hole Accuracy in Drilling.", Doctorate Thesis, Jeonbuk University, Republic of Korea. 2009.
5 Kahng, C. H., Ham, I., "A study on sequential quality improvement in hole-making processes." Annals of the CIRP Vol. 24, No. 1, pp. 27-32, 1975.
6 Hwang C. W., "A Study on the Drilling Operation with Tungsten Carbide Insert Drill Tip by Statistical Analysis", A Thesis for a Master's degree, Polytechnic University, Republic of Korea.
7 Yoon, J. H., Seo, S. W., and Lee, H. C., "A Study on the Effect of Dimensional Errors and Roundness in High Speed Cylindrical Machining of Al-alloy", Journal of the Korean society of machine tool engineers, Vol. 10, No. 5, pp. 17-27, 2000.
8 Doo, S., Hong, J. W., and Suh, N. S., "A Study on the Cutting Force and Machining Error on the Inclined Plane in Ball-end Milling", J. Korean Soc. Manuf. Process Eng., Vol. 18, No. 7, pp. 112-119, 2001.
9 Kim, J. S., Choi, C. W., and Shin, M. J., "A Study on the Squareness of Circular Pocket Machining of SCM415 Steel", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 18, No. 7, pp. 42-47, 2019.   DOI
10 Yoo, H. J., "A Study on the Optimization of Drilling Operations(1): Optimization of Machining Variables for Drilling Operations " Journal of the Korean Institute of Industrial Engineers, Vol. 12, No. 2, pp. 337-345, 1999.
11 Oh, Y. T., Kim, G. D., and Chu, C. N., "Cutting Torque Control in Drilling - Part 2 : Drilling Torque Control Using Spindle Motor Current and Its Effect on Drill Flank Wear", Journal of the Korean Society for Precision Engineering, Vol. 18, No. 8, pp. 107-115. 2001.
12 Lee, Y. C., Kwak, T. S., and Kim, G. N., Lee, J. R., "High-speed Machining Technology using CNC Machining Center Equipped with Attachment Type High-Speed Spindle", Journal of the Korean society of machine tool engineers, Vol. 11, No. 2, pp. 152-158, 2012.
13 Shin, M. J., Kim, I. S., and Kim, J. H., Kim, J. S., Kim, M. K., "Hardness Machining Characteristics using the SCM415 Still", J. of Korean Soc. Manuf. Process Eng., Vol. 16, No. 2, pp. 44-49, 2017.   DOI
14 Kim, Y. K., "A Study on the Optimum Cutting Condition in Reamer Machining of SNCM616 Alloy Steel", A Thesis for a Master, Kyungsang National University, Republic of Korea, 2018.