AbstractA centreless grinding machine has been investigated to determine the nature of machine deflections under the influence of the grinding force.
The static deflections were analysed into the contributions from the various major elements of the machine, including the control wheel, bearings, spindle and housing, the grinding wheel bearings, spindle and housing. It was found that the cost compliant elements were the control wheel bearings.
The dynamic deflections were analysed and as far as possible identified with those elements mainly involved in the vibration. Equivalent dynamic parameters were
Obtained from the lower frequency resonances. It was found that the resonance at 82 Hz was of dominant importance in the formation of the workpiece profile. This mode was largely associated with the nature of the constraint of the control wheelhead by the tray.
The process was simulated on a hybrid computer and it was shown that the results correlated well with grinding experiments and provides a realistic tool for further investigations.
Some limitations of other existing methods of analysis have been discussed.
In practical grinding tests, the influence of varying wheel conditions on the roundness and sizing were observed. Suggestions have been made for improved design of the machine.
The investigations were restricted to plunge grinding operations.
|Date of Award||1972|
|Sponsors||Science Research Council & Wickman Ltd.|
|Supervisor||W. Brian Rowe (Supervisor) & J. Loxham (Supervisor)|