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在加工较深的孔(深度为直径的10倍以上)时,用以往的刀具由于切削刃磨损较快,难以获得所要求的精度.本发明提供一种加工普通孔或精密孔用的球形多刃工具,它具有提高切削系数及稳定性、并能扩大使用范围等特点.刃部2相对于球形头1的子午面倾斜,球形头绕轴颈3的中心线0—0回转,且中心线0—0与工具柄4的轴线L—L 相交成锐角α,这是该工具的结构特征.这种多刃工具制造、重磨都较容易,球形头的切削刃按螺旋线配列在球形表面上也较方便.由于这些特点,使切入更平滑、切削刃的工作长度增加,工具的稳定性提高,明显地改善了切削状态.
In the processing of deeper holes (depths of more than 10 times the diameter), it is difficult to obtain the required accuracy with the prior art tools due to the rapid wear of the cutting edges.This invention provides a method of forming a spherical Edge tool which has the characteristics of improving the cutting coefficient and stability and expanding the use range etc. The blade part 2 is inclined relative to the meridian plane of the spherical head 1 and the spherical head is revolved around the center line 0-0 of the journal 3 and the center line 0-0 intersects the axis L-L of the tool shank 4 at an acute angle α, which is a structural feature of the tool, which is easier to manufacture and resharpening, with the cutting edges of the ball-shaped head being arranged helically on a spherical surface On the more convenient because of these characteristics, make the cut into a smoother, the cutting edge of the working length increases, the stability of the tool to improve and significantly improve the cutting state.