0
Technical Brief

Chatter Avoidance in Parallel Turning With Unequal Pitch Angle Using Observer-Based Cutting Force Estimation

[+] Author and Article Information
Shinya Sakata

Keio University,
Yokohama, Kanagawa 223-8522, Japan
e-mail: sakata@ams.sd.keio.ac.jp

Takashi Kadota

Keio University,
Yokohama, Kanagawa 223-8522, Japan
e-mail: kadota@ams.sd.keio.ac.jp

Yuki Yamada

Keio University,
Yokohama, Kanagawa 223-8522, Japan
e-mail: yamada@ams.sd.keio.ac.jp

Kenichi Nakanishi

Nakamura-Tome Precision Industry Co., Ltd.,
Hakusan, Ishikawa 920-2195, Japan
e-mail: kenichi-nakanishi@nakamura-tome.co.jp

Hayato Yoshioka

FIRST, Tokyo Institute of Technology,
Meguro, Tokyo 152-8550, Japan
e-mail: yoshioka.h.aa@m.titech.ac.jp

Norikazu Suzuki

Nagoya University,
Nagoya, Aiti 464-0814, Japan
e-mail: nsuzuki@mech.nagoya-u.ac.jp

Yasuhiro Kakinuma

Keio University,
Yokohama, Kanagawa 223-8522, Japan
e-mail: kakinuma@sd.keio.ac.jp

Manuscript received June 12, 2017; final manuscript received January 10, 2018; published online February 14, 2018. Assoc. Editor: Satish Bukkapatnam.

J. Manuf. Sci. Eng 140(4), 044501 (Feb 14, 2018) (7 pages) Paper No: MANU-17-1367; doi: 10.1115/1.4039111 History: Received June 12, 2017; Revised January 10, 2018

Parallel turning is garnering attention as one of the most important technologies for multitasking machine tools. This is because a potential exists to enhance the stability limits compared to the turning operation using a single tool when cutting conditions are properly selected. Although stability prediction models for parallel turning have been developed in recent years, in-process monitoring and in-process chatter techniques are almost not discussed. In this study, to suppress chatter vibration, an unequal pitch turning method was proposed. In this method, the upper tool was controlled based on the optimum pitch angle calculated from spindle speed and chatter frequency. Chatter frequency was identified from estimated cutting force by a disturbance observer (DOB). From the result of the parallel turning test, it is clear that chatter vibration can be avoided by controlling the upper tool based on optimum pitch angle. Meanwhile, the pitch angle difference that can suppress chatter had a certain range. Subsequently, the robustness of the optimum pitch angle difference is experimentally evaluated by both the continuous moving test and the stepwise moving test of the pitch angle.

FIGURES IN THIS ARTICLE
<>
Copyright © 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Budak, E. , Comak, A. , and Ozturk, E. , 2013, “ Stability and High Performance Machining Conditions in Simultaneous Milling,” CIRP Ann. Manuf. Technol., 62(1), pp. 403–406. [CrossRef]
Budak, E. , and Ozturk, E. , 2011, “ Dynamics and Stability of Parallel Turning Operations,” CIRP Ann. Manuf. Technol., 60(1), pp. 383–386. [CrossRef]
Brecher, C. , Epple, A. , Neus, S. , and Fey, M. , 2015, “ Optimal Process Parameters for Parallel Turning Operations on Shared Cutting Surfaces,” Int. J. Mach. Tools Manuf., 95, pp. 13–19. [CrossRef]
Kakinuma, Y. , Sudo, Y. , and Aoyama, T. , 2011, “ Detection of Chatter Vibration in End Milling Applying Disturbance Observer,” CIRP Ann. Manuf. Technol., 60(1), pp. 109–112. [CrossRef]
Yamada, Y. , Kadota, T. , Sakata, S. , Tachibana, J. , Nakanishi, K. , Sawada, M. , and Kakinuma, Y. , 2017, “ Integrated Chatter Monitoring Based on Sensorless Cutting Force/Torque Estimation in Parallel Turning,” Int. J. Autom. Technol., 11(2), pp. 215–225. [CrossRef]
Yamada, Y. , and Kakinuma, Y. , 2016, “ Sensorless Cutting Force Estimation for Full-Closed Controlled Ball-Screw-Driven Stage,” Int. J. Adv. Manuf. Technol., 87(9–12), pp. 3337–3348. [CrossRef]
Shamoto, E. , Kageyama, K. , and Moriwaki, T. , 2002, “ Suppression of Regenerative Chatter Vibration With Irregular Pitch End Mill: Construction of Analytical Model and Optimization of Pitch Angle,” JSME Kansai Branch Annual Meeting, pp. 3–5 (in Japanese).
Shamoto, E. , Mori, T. , Sencer, B. , Suzuki, N. , and Hino, R. , 2013, “ Suppression of Regenerative Chatter Vibration in Multiple Milling Utilizing Speed Difference Method–Analysis of Double-Sided Milling and Its Generalization to Multiple Milling Operations,” Precis. Eng., 37(3), pp. 580–589. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Prototype of multitasking machine tool: (a) front view and (b) system configuration

Grahic Jump Location
Fig. 2

Dual-inertia model of ball-screw driven stage in the X direction

Grahic Jump Location
Fig. 3

Comparison of parallel turning method: (a) equal pitch turning and (b) unequal pitch turning

Grahic Jump Location
Fig. 4

Each cutting tool left on the wavy surface

Grahic Jump Location
Fig. 5

Experimental setup for cutting tests

Grahic Jump Location
Fig. 6

Frequency response of workpiece at tip

Grahic Jump Location
Fig. 7

Time-frequency domain data of estimated cutting force at equal pitch turning

Grahic Jump Location
Fig. 8

Time-frequency domain data of estimated cutting force at unequal pitch turning

Grahic Jump Location
Fig. 9

Machined surface of workpiece: (a) equal pitch turning and (b) unequal pitch turning

Grahic Jump Location
Fig. 10

Schematic diagram of tool motion

Grahic Jump Location
Fig. 11

Experimental result under continuous movement of pitch angle: (a) time-frequency analysis result of estimated cutting force and (b) motion trajectory of the tool 1 in the X-axis

Grahic Jump Location
Fig. 12

Time-frequency analysis results of estimated cutting force under various phase shift

Grahic Jump Location
Fig. 13

Relationship between phase difference and machined surface

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In