Abstract
This paper deals with a formation mechanism of the entrance burr by using an experimental method and a finite element method. The relation between burr size and grinding condition, -such as work speed, depth of cut, grinding direction, number of grinding passes and edge angle, -is investigated. In the calculation, grinding temperature and cutting force for a cutting point are considered. Therefore, the mechanical and thermal strain distribution and plastic deformation near the workpiece end are derived. The main results obtained are as follows : (1) The entrance burr has a burr-root thickness of 40-60μm and a burr height of 3-5μm. The entrance burr is smaller than exit burr in size. (2) Deformation of the corner shape is produced mainly by the grinding force. (3) The grinding temperature causes a plastic deformation on a workpiece-surface layer, however it is not enough to produce an entrance burr.
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