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Research Papers

A Model and Application of Vibratory Surface Grinding

[+] Author and Article Information
Grzegorz Bechcinski, Norbert Kepczak

Institute of Machine Tools and
Production Engineering,
Lodz University of Technology,
Lodz 90-924, Poland

Heisum Ewad

Faculty of Engineering,
University of Medical Sciences and Technology,
P.O. Box 12810,
Khartoum, Sudan

Vaios Tsiakoumis, Andre D. L. Batako

The Faculty of Engineering and
Technology General Engineering Research Institute,
Liverpool John Moores University,
Byrom Street,
Liverpool L3 3AF, UK

Witold Pawlowski

Institute of Machine Tools and
Production Engineering,
Lodz University of Technology,
Lodz 90-924, Poland
e-mail: witold.pawlowski@p.lodz.pl

Alison McMillan

School of Applied Science,
Computing and Engineering,
Wrexham Glyndwr University,
Mold Road,
Wrexham LL11 2AW, Wales, UK

1Corresponding author.

Manuscript received November 21, 2017; final manuscript received June 28, 2018; published online July 27, 2018. Assoc. Editor: Y. B. Guo.

J. Manuf. Sci. Eng 140(10), 101011 (Jul 27, 2018) (9 pages) Paper No: MANU-17-1727; doi: 10.1115/1.4040725 History: Received November 21, 2017; Revised June 28, 2018

This paper presents a model of surface grinding with superimposed oscillation of the workpiece. The parameters of the model were experimentally derived and the equations of motions of the system were solved using Matlab. The results obtained showed a significant decrease in the amplitude of the relative vibration between the wheel and workpiece when the oscillation was superimposed onto the feed motion of the workpiece. A range of experimental work was undertaken and the results showed that the vibratory process had a superior performance in absolute terms with reference to conventional grinding. Low forces along with longer tool life were recorded with the added vibration. A notion of dynamic relief was introduced to express the efficiency of the vibratory process.

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References

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Figures

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Fig. 1

Typical vibrations in a surface grinder

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Fig. 4

Physical model of the flat grinder: (a) front view, (b) side view, and (c) top view

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Fig. 3

The oscillating table

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Fig. 2

The SPC 20 surface grinder

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Fig. 5

Sketch of the kinematics of single grain in up-grinding with superimposed vibrations

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Fig. 6

Gyro-effect of the grinding wheel spindle unit ω0

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Fig. 14

Material removed for 454A 601L7GV3 grinding wheel, the wheel speed 35 m/s, frequency of superimposed vibrations 200 Hz

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Fig. 15

Wheel performance—G-Ratio

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Fig. 9

The workpiece position in z direction for conventional grinding (G, grinding; SP, spark-out)

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Fig. 10

The relative position of the grinding wheel and the workpiece in z-direction (G, grinding; SP, spark-out): (a) conventional grinding and (b) vibratory grinding

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Fig. 7

Wheel spindle amplitude-frequency response: (a) x-direction and (b) z-direction

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Fig. 8

The grinding wheel position in z-direction (G, grinding; SP, spark-out): (a) conventional grinding and (b) vibratory grinding

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Fig. 11

Specific normal grinding force for hardened steel EN31 (64HRC), 454A 601L7GV3 grinding wheel, the wheel speed 35 m/s

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Fig. 12

Dynamic relief induced by vibratory process for hardened steel EN31 (64HRC)

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Fig. 13

Comparative actual achieved depth of cut for hardened steel EN31 (64HRC), 454A 601L7GV3 grinding wheel, the wheel speed 35 m/s

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