Abstract
This paper presents the experimental analyses of thermal deformation of cylindrical workpiece. The deformation depends upon the heat capacity of workpiece and the kind of honing stone applied. Thermal effect due to the heat capacity becomes clear from the measurement of temperature increase of the workpieces with 2.9, 5.4, 10 and 20 mm thickness respectively. In wet honing the temperature of workpiece with small heat capacity increases soon after the honing start. Therefore the thermal deformation is not small even if honing time is short. After several minutes the value of thermal deformation of thin workpiece is nearly the same as one of thick workpiece under wet honing. Temperature increase of workpiece is observed by varying three basic characters of the honing stone ; grain size, stone hardness and filling-up material. The temperature increase is high under the condition with remarkable wear dimension of honing stone. From a viewpoint of thermal deformation, it is better to avoid a honing stone with too fine grain and a too soft honing stone. The thermal deformation in case of honing stone filled-up with sulphur is nearly the same as one of nonfilled stone. In contrast, a honing stone filled-up with paraffin causes a larger thermal deformation in the workpiece.
