CUTTING TOOL FOR WORKING MODEL AND MODEL-WORKING PROCESS

摘要

PURPOSE:To enable the round parts by many kinds to be worked without the changing of tools by a method in which the cutting tool formed by cutting off a prescribed amount of the cylindrical member with the tip of spherical surface along the axis thereof, is fitted to the main shaft whose rotation many be controlled, and while the main shaft is moved in the direction crossing perpendicularly the axis of the main shaft, the tool is set at a prescribed angle to the moving direction of the main shaft. CONSTITUTION:A roundness-changeable cutting tool 8 has the shape formed by cutting off the prescribed amount of the cylindrical member with the tip of spherical surface along its axis, and may change its angle around the control axis with a main shaft 7. When the roundness of the tool tip is necessary to be changed according to the shape or the roundness of the corner of a work 3, the direction (angle alpha) of the cutting tool 8 is changed by controlling the rotation angle of the main shaft (axis C) 7. By changing the direction of the cutting tool 8, the roundness of the cutting edge 8a of the tip of the tool 8, is changed. Thus, one roundness-changeable cutting tool 8 may corresponds to the working of the round parts of many kinds by rotating the roundness-changeable cutting tool 8 and by changing its direction.