Abstract
This paper deals with the thermal deformation of a workpiece, which is expected to affect the ground-surface straightness in cross-feed direction, by means of a finite-element method. Estimated results of the thermal deformation are compared with measured profiles of ground surfaces. Besides, the effect of chamfering at workpiece corners and supplying a grinding fluid on improving the straightness are verified. The main results obtained are as follows : (1) The thermal deformation caused by grinding heat results in the concave profile of a ground surface in crossfeed direction. (2) The measured depths of the concaves ΔZ agree well with the results which are estimated by taking the elastic-plastic property of a workpiece material into consideration. (3) The chamfering on workpiece corners diminishes the value of ΔZ. (4) When the grinding fluid is sufficiently supplied at a grinding point the value of ΔZ is effectively decreased.
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