Research Papers

New Models and Global Stability Charts to Avoid Principal Instabilities and Constraints in Throughfeed Centerless Grinding

[+] Author and Article Information
D. Barrenetxea1

 Ideko IK4 S. Coop., Pol. Industrial de Arriaga, 2. 20870 Elgoibar, Spaindbarrenetxea@ideko.es

J. Álvarez, J. I. Marquínez

 Ideko IK4 S. Coop., Pol. Industrial de Arriaga, 2. 20870 Elgoibar, Spain

J. Madariaga

 Tekniker IK4, Avda. Otaola 20, 20600 Eibar, Spain; Faculty of Engineering, Mondragon University, Loramendi 4, 20500 Mondragon, Spain

I. Gallego

Faculty of Engineering, Mondragon University, Loramendi 4, 20500 Mondragon, Spain

I. Muguerza Perelló

 Estarta S. Coop., Pol. Industrial Sigma Xixilion, 2, Pabellón 10, 20870 Elgoibar, Spain


Corresponding author.

J. Manuf. Sci. Eng 132(1), 011014 (Feb 02, 2010) (7 pages) doi:10.1115/1.4000931 History: Received July 07, 2009; Revised December 23, 2009; Published February 02, 2010; Online February 02, 2010

This paper presents new simulation models and global stability charts that have been developed to analyze the principal instabilities and constraints involved in the throughfeed centerless grinding process. In addition to a frequency domain stability analysis of the three characteristic instabilities of the process (geometric lobing, chatter and spinning), new models have been developed and implemented to analyze the other main restrictions, namely, process power, temperature and burning power, roughness, and final part geometrical tolerance due to machine compliance. As a result, new global stability charts have been devised where instabilities are plotted against different productivity rates by combining the two principal variables in the throughfeed process: regulating wheel speed and feed angle. The use of such charts has led to the development of new optimization strategies for throughfeed operation mode and their implementation in a web based SET-UP ASSISTANT software tool developed to improve machining accuracy and productivity in centerless grinding.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

Centerless (a) infeed and (b) throughfeed configurations

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Figure 2

Example of the global stability chart regarding characteristic instabilities

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Figure 3

Influence of workheight on global stability chart

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Figure 4

Example of the global stability chart with all the instabilities and constraints

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Figure 5

Process global stability chart



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