抄録
In order to investigate the effect of cutting fluids in reaming operation, reaming tests were performed with various kinds of cutting fluids, and the reaming torque and the accuracy of reamed holes were compared for dry and wet reaming conditions.
Application of cutting fluids in reaming operation improved the accuracy of reamed holes, though the reaming torque was increased. The cutting torque component was scarcely affected by cutting fluids. However, supply of cutting fluids increased the burnishing torque component in the order of dry, cutting oils, and soluble oils. Dry reaming and reaming with cutting oils produced oversized holes, while reaming with soluble oils produced holes smaller than the actual size of the reamer. The smaller the amount of enlargement of the reamed hole, the larger the burnishing torque component and the better the surface finish of the reamed hole, in the order of dry, cutting oils, and soluble oils.
With increases in cutting speed, feed rate, and depth of cut, the amount of enlargement of the reamed hole increased and the surface finish became worse, for both dry and wet reaming conditions.
The stable reamer after used several dozen times produced better reamed holes than the sharp reamer.
