Optimizing static and dynamic stiffness of machine tools spindle shaft, for improving machining product quality

• Autorzy: Prakosa T. , Wibowo A. , Ilhamsyah R.
• Języki publikacji: EN

Abstrakty

EN

Automotive industries in Indonesia have grown up fast, and in-line with it, machine tools population has also grown up. Nevertheless, most of these machines are imported, because there are only few machine tools industries in Indonesia. Based on this situation, Indonesia has started to build its own machine tools industry in order to support mostly, automotive industries. This paper deals with an activity in machine tools performance improvement researches in Indonesia, that is, improving spindle static and dynamic stiffness. Spindle shaft is the weakest point in machine tools structure, increasing its stiffness will further increase machine tools accuracy and machining product quality as well. Moreover, high productivity needs machine tools with high speed machining capability, which leads into unavoidable dynamic effects that occur in the machine tool spindle during production process such as regenerative chatter. A study has been conducted on developing mathematical model for calculating static and dynamic stiffness of machine tools spindle shaft and studying changes of spindle shaft static and dynamic stiffnesses, by varying bearings preload, number of bearings, bearings span and spindle length. The study was conducted theoretically and experimentally on a national-built CNC vertical milling machine. The study shows that the machine tools spindle shaft stiffness can be increased by optimizing the parameters aforementioned.

Słowa kluczowe

EN

static stiffness; dynamic stiffness; preload

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 4
• Strony: 363--370
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Prakosa T.

• Bandung Institute of Technology Mechanical Engineering Department Jl. Ganesha 10, Bandung, West Java, Indonesia (40132) tel.: [phone], fax: [phone]

autor

Wibowo A.

• Bandung Institute of Technology Mechanical Engineering Department Jl. Ganesha 10, Bandung, West Java, Indonesia (40132) tel.: [phone], fax: [phone]

autor

Ilhamsyah R.

• Bandung Institute of Technology Mechanical Engineering Department Jl. Ganesha 10, Bandung, West Java, Indonesia (40132) tel.: [phone], fax: [phone]

Bibliografia

• [1] Indonesia Bussines Online – printed edition–Tuesday, October 6th, 2009.
• [2] Export-Import Data Based on HS 8458-8463 Commodity Year 2005-2012, Indonesia Central bureau of statistics.
• [3] Prakosa, T., Wibowo, A., Yuwana, Z., Pengujian Ketelitian Geometrik Mesin Perkakas CNC Milling Vertikal Buatan dalam Negeri, Seminar Nasional Tahunan Teknik Mesin IX, Palembang 2011.
• [4] Prakosa, T., Wibowo, A., Yuwana, Z., dan Nurhadi, I., Metode Penyelarasan Servo (servo tuning) Untuk Meningkatkan Ketelitian Mesin Perkakas CNC, Studi Kasus: Mesin CNC Milling Vertikal Buatan Dalam Negeri, Seminar Nasional Tahunan Teknik Mesin X, Malang 2011.
• [5] Prakosa, T., Nasril, Yuwana, Z., Nurhadi, I., Development and Manufacturing of a Measurement Apparatus for NC Machine Tools Diagnosis by Double Ball Bar Method, Proceedings of the 4th International Product Design & Development, Yogyakarta 2011.
• [6] Agung Wibowo, Tri Prakosa, Arie Nugraha ,On the Process of Accuracy Improvement of a Machine Tools, Case study: 3-axis CNC Vertical Milling, 5th AUN/SEED-Net Regional Conference on Manufacturing Engineering, Manila 2012.
• [7] Prakosa, T., Wibowo, A., dan Nugraha, A., Perancangan Awal dalam Pengembangan Spindel Kecepatan Tinggi, Proceeding Seminar Nasional Tahunan Teknik Mesin XI (SNTTM XI) & Thermofluid IV, Universitas Gadjah Mada (UGM), Yogyakarta 2012.
• [8] Rao, Singiresu S., 2004, Mechanical Vibrations 4th Edition, U.S.A.: Pearson Education, Inc.
• [9] “Harris, T. A., Kotzalas, M. N., Essential Concept of Bearing Technology, Taylor and Francis Group, New York 2006.