English Title (15pt. Times New Roman, 진하게, 가운데)

Gil-Dong Hong*, Gil-Dong Lee*, Gil-Dong Kim**,＃[영어 저자이름 스타일 : Times New Roman 12Point, 행간격 120%, 필히 ! Full Name]

*School of Mechanical Engineering, KSMPE UNIV., **KSMPE LTD.(9pt 돋움체 가운데, 행간격 120%)

한글 제목(돋움체, 14pt. 진하게 가운데)

홍길동*, 이길동*, 김길동**,#[한글 저자이름 스타일 : 한글 돋움체, 10Point 행간격 120%]

*한국기계가공대학교 기계공학과, **(주)한국기계가공 [한글 저자소속 스타일 : 9Point 돋움체, 120%]

(Received 5 December 2012; received in revised form 9 December 2022; accepted 11 December 2022)

ABSTRACT(11pt Times new romans 가운데 진하게)

The wavelet transform is a popular tool for studying intermittent and localized phenomena in signals. In this study the wavelet transform of cutting force signals was conducted for the detection of a tool failure in turning process. We used the Daubechies wavelet analyzing function to detect a sudden change in cutting signal level. A preliminary stepped workpiece which had intentionally a hard condition was cut by the inserted cermet tool and a tool dynamometer obtained cutting force signals. From the results of the wavelet transform, the obtained signals were divided into approximation terms and detailed terms. At tool failure, the approximation signals were suddenly increased and the detailed signals were extremely oscillated just before tool failure.

(9pt Times new romans 양쪽혼합) (200단어 이내로 작성)

Keywords : Condition Monitoring(상태감시), High Speed Machining(고속가공), Cutting Force(절삭력),

[kewords는 5개 단어 이내로 작성 English(Times new romans)(한글(돋움체))9pt작성]

1. Introduction

한국기계가공학회지, 제14권, 제1호, pp. xx～xx (2015. x )

Journal of the Korean Society of Manufacturing Process Engineers, Vol.14, No.1, pp. xx～xx (2015. x )

□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□

(12pt. Times New Roman, 가운데, 진하게)

# Corresponding Author : ksmpe@ksmpe.ac.kr

Tel: +82-53-581-2239, Fax: +82-53-581-2295

(8pt Times new romans 양쪽혼합)반드시 영어로 작성

(9pt, Times New Roman, 양쪽혼합) Recently, the advance of technology in aerospace and automobile industries has been achieved since new machining methodologies and schemes appeared. In order to increase productivity of these related parts, the most effective method is to reduce the machining time. One of the common trends to reduce the machining time is to cut at high spindle speed in most machining fields[1-3].(9pt, Times New Roman, 양쪽혼합)

In this paper, the surface roughness obtained at various grinding conditions was measured. The residual stresses at the workpiece were measured by X-ray diffraction. Also, the quality of the grinding surface was analyzed by the three dimensional measuring

2. Relevant Equations

2.1 Friction coefficient(11pt, Times New Roman, 진하게, 양쪽혼합)

The friction coefficient, ratio of traction force to normal force, is written as:

[eqn: mu= {F } over {W }= { INT INT eta_v { dV} over {dz } dxdy } over {W }]           (1)

If friction exist between two surfaces which carry normal load with relative motion, part of energy is dissipated in the form of heat.

3. Experiment

Gil-Dong Hong․Gil-Dong Lee․Gil-Dong Kim : 한국기계가공학회지 제5권, 제1호

□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□

Detection of Tool Failure by Wavelet Transform : 한국기계가공학회지, 제5권

□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□

3.1 Experiment setup and conditions

The grinding machine of RFM-760 was used as the high speed grinding in this experiment. The STD11 had been used as die and mold materials with length of 150mm, width of 40mm and height of 15mm. Each workpiece was ground for 6 passes. Fig. 1 shows the schematic diagram of the experimental setup and the evaluation factors. The experimental conditions were listed in Table 1.

Fig. 1 Experimental set-up(9pt Times New Roman 캡션위치 Fig 하단)

Table 1 Experimental conditions

(9pt Times New Roman 캡션위치 Table 상단)

Items	Type
Lathe	HWACHEON HL 380B
Tool dynamometer	Kistler 9272
Amplifier	Kistler 5019
Tool	TNGA160408
Workpiece	SM45C 250×60
Machining conditions	Feedrate : 0.3mm/rev Spindle speed : 680rpm

3.2 Design of high speed grinding tool

In order to investigate the measuring and the micro-scratching performance of the SFM system, stability of displacement detection, repeatability of profile measurement, and the relationship between load and angular sensor output were investigated.

4. Results and Discussion

4.1 The characteristics of surface roughness

Fig. 4 represents the variation of the surface roughness when the feed rate was fixed as 100mm/min  and the depth of cut  was changed in 4 steps as 1, 2, 5 and 10μm. From the result, the high-speed grinding was maintained to a better surface roughness than the high speed cutting.

5. Conclusion

In this study, the machining characteristics of the mold material were experimentally evaluated in high speed grinding. The following conclusions can be drawn :

1. When the depth of cut was 2μm and the grinding was 5 passes, the surface roughness sharply increased and the 3 dimensional profiles fluctuated because of the falling off of the grains of the CBN wheel.

2. The residual stress according to the depth of cut increased at the high speed grinding and the high speed cutting.

References

1. Jung, S. K. and Lee, S. H., A Guide of shot peening Processing, Se Hwa Pub, pp. 6-12, 2001.

2. Gillespie, R. D., “Its Effect on Process Consistency and Resultant Improvement in Fatigue Characteristics,” Proc. of the 5th International Conference on Shot peening, Vol. 1, Oxford, pp. 81-90, 1993.

3. Thoe, B., Aspinwall, K. and Wise, H., “Review on Ultrasonic Machining,” International Journal of Machine Tools and Manufacture, Vol. 38, No. 4, pp. 239-255, 1998.

4. Kwon, K. and Mun, D., “Iterative offset-based method for reconstructing a mesh model from the point cloud of a pig,” Computers and Electronics in Agriculture, Vol. 198, 106996, 2022.

https://doi.org/10.1016/j.compag.2022.106996.

* References should written in Roman alphabet.

[style : Times New Roman 9Point, 150%, 내어쓰기 11Point]

** 참고문헌 표기는 다음의 방식을 따름.

① 저서일 경우 : 저자명, 책명, 출판사명, 인용 페이지, 발행년도.

1. Lee, H. G., Engineering Optimization-Theory and Practice, Wiley- Interscience Publication, pp. 200-205, 1996.

2. ANSYS, ANSYS User's Manual Version 10.0, ANSYS Inc., pp. 35-36, 2005.

② 정기간행물일 경우 : 저자명, “제목명,” 잡지명, 권(호), 인용페이지, 출판년도.

1. Rhee, H. W.,  "Experimental Evaluation of Fatigue Threshold for SA-508 Reactor Vessel Steel," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 11, No. 4, pp. 160-167, 2012.

2. Park, J. K., Kim, I. W. and Choi, M. P.,  "Optimal Synthesis of Steering Mechanisms Considering Transmission Angles," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 11, No. 1, pp. 68-75, 2012.

③ 학위논문일 경우 : 저자명, 논문명, 학위명, 논문제출기관(대학 등), 국가명, 제출년도.

1. Choi, K. J., "Optimized Shape Design of a Speed Brake Considering its Machineability," A Thesis for a Doctorate, Gyeongsang National University, Republic of Korea, 2011.

④ 웹사이트를 인용하는 경우 : <-- 가능하면 인용하지 말것

(1) 사람이름(년도), “제목,” Retrieved 날짜, from URL.

1. Lee, K. K.(2013), "Optimal Synthesis of Steering Mechanisms Considering Transmission Angles," Retrieved 30, Aug., 2013, from http://ksmpe.or.kr.

(2) 제목(년도), URL(accesed 날짜).

1. "Optimal Synthesis of Steering Mechanisms Considering Transmission Angles,"(2013) http://ksmpe.or.kr(accessed 24, Aug., 2013)