Kardioid şekilli kamların CNC freze tezgahlarında imalatlarının araştırılması

Bu çalışmada, kardioid şekilli kamın, CNC freze tezgahlarında imalatı araştırılmıştır. Bu şekilde bir imalat için, kardioidin kutupsal koordinatlarda verilen R = a . ( 1 + $Costheta$ ) genel denklemi dikkate alınmıştır. Bu denkleme göre, kardioid şekilli kamın imalat denklemleri çıkartılmış ve CNC imalat programı hazırlanmıştır. Daha sonra bu program ile DM 2900 tipi CNC freze tezgahında bir kam imal edilmiştir. Yapılan bu imalat sonunda, imalat denklemlerindeki parametrelerin kamın imalat maliyetlerini ve işlenme hassasiyetini önemli ölçüde etkilediği görülmüştür.

An investigation on manufacturing of the cardioid cams have in CNC milling machines

In this study, it has been aimed the manufacturing of the cam have cardioid shape in CNC milling machines. For this purpose, manufacturing, it has been considered R = a . ( 1 + $Costheta$ ) general equation given at polar coordinate of cardioid. According to this equation, the manufacturing equations of the cam have cardioid shape have been derived and CNC manufacturing programme have been prepared. After that, a cam has been manufactured by using this programme in DM 2900 CNC milling machines. In the end of this manufacturing, it has been seen that the parameters in manufacturing equations considerably have been effected to cost of manufacturing and machining accuracy.

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[1] Daoyuan, Y., Zhengcheng, D., Xiong, Z., and Jinning, L., “Local Discretization Without Tolarence in The CAD/CAM and NC Programming of a Sculptured Surface”, Journal of materials proccesing technology 57 195-200., 1995

[2] Vickers, G.W., and Quan, K.W., “Ball-mills versus end-Mills for Curved Surface Machining”, Trans. ASME. Journal of Engineering for Industry, 22/Vol.111, February., 1989.

[3] Choi, B.K., and Jun, C.S., “Ball-end Cutter Interference Avoidance in Nc Machining of Sculptured Surfaces”, Computer-aided design Vol.21 No.6July/August., 1989.

[4] Elber, G., and Cohen, E., “Toll Path Generation for Freefrom Surface Models”, 2nd ACM Solid Modeling, 93-5/Montreal, Canada.,1993.

[5] Choi, B.K., Lee, C.S.,Hwang, J.S. and Jun, C.S.,. “Compound Surface Modelling and Machining”, Computer-Aided Design, Vol.20, No.3 April., 1988.

[6] Hwang, J.S.,. “Interference-free Tool-Path Generation in The NC Machining of Parametric Compound Surfaces”, Computer-Aided Design Vol.24, No.12, December., 1992.

[7] Bobrow, J.E., “NC Machine Tool Path Generation From CSG Part Representations”, Computer Aided Design, Vol.17, No.2, March., 1985.

[8] Park, S., Yang, M.Y., and Lee C.W., “Simulation of NC Machining Using a Ball End Mill”, Korea Institute of Science and Technology, CAD/CAM Laboratory. ,1998.

[9] Golub, A.D., and Yang, D.C.H.,. “Improved Trajectory Generation for Precision CNC Milling of Arbitrary Contours and Surfaces”, Precision Machining: Technology and Machine Development and Improvement ASME PED-Vol.58., 1992.

[10] Dereli, T. ve Filiz H., “Automatic CNC Code Generation In Process Planning of Rotational And Prismatic Parts”, Politeknik Dergisi, Cilt:3 Sayı:2 s.1-25., 2000.

[11] Dereli, T. ve Filiz H., “Optimisation of Process Planning Functions by Genetic Algorithms Computers & Industrial Engenering”, Vol. 36, No.2, pp. 281-308., 1999.

[12] Karagöz, Y., “Nümerik Kontrollü Tezgahlar İçin Programlama (CAM) Teknikleri”, Mühendis ve Makine- Cilt 41 Sayı 483., Nisan., 2000.

[13] DM 2900 Operation Manuel, Dyna Mechtronics Inc. Ltd. 926 W. Maude Ave. Sunnyvale, Ca.94086 U.S.A., 1996.