コール・カッタ・ピックによる石炭切削

抄録

For the purpose of estimating the driving power of coal cutter required to coal seam cutting, we studied several foundamental experiments using coal cutter picks. In these experiments, the main and subordinate component of cutting resistance of coal were measured independently at the same time by the new type dynamometer with four strain gauges pasted. on an elastic steel circular disc, and the influences of depth of cut, characteristics of coal, rake and clearance angle, setting angle of pick and the neighbouring groove already cut by otherpick on the cutting resistance were made clear. By these results, estimation of the driving power of coal cutter became probable for the authors which will be explained in next report.