Unstable vibration in centreless grinding: Part 2. Graphical method

The authors demonstrated in a previous paper that in centreless grinding geometric instability and chatter were essentially the same phenomenon. In this paper a graphical approach developed for metal cutting is extended to centreless grinding with the aim of explaining certain earlier findings. It h...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part B, Journal of engineering manufacture Journal of engineering manufacture, 2011-08, Vol.225 (8), p.1245-1254
Main Authors: Pearce, T R A, Stone, B J
Format: Article
Language:English
Subjects:
Applied sciences
Chatter
Cutting
Cylindrical grinding
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Grinding wheels
Industrial metrology. Testing
Instability
Machining. Machinability
Mechanical engineering
Mechanical engineering. Machine design
Mechanical engineers
Metal cutting
Metals. Metallurgy
Physics
Production techniques
Resonant frequency
Roundness
Solid mechanics
Stability
Structural and continuum mechanics
Vibration
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:The authors demonstrated in a previous paper that in centreless grinding geometric instability and chatter were essentially the same phenomenon. In this paper a graphical approach developed for metal cutting is extended to centreless grinding with the aim of explaining certain earlier findings. It has been shown that the additional force components in centreless grinding allow chatter to occur at frequencies well below the natural frequency and give rise to roundness errors previously considered as geometric instability. These additional force components also explain why a flexible wheel does not improve stability in centreless grinding. Furthermore, it has been shown that the higher resultant force with centreless grinding results in a lower minimum stable width compared with conventional cylindrical grinding.
ISSN:0954-4054
2041-2975
DOI:10.1177/2041297510393791