小径穴加工における工具振れ回りが加工精度に及ぼす影響

抄録

The drilling is used for many automobile parts. Especially, small-diameter holes are required of high precision. The drilling in Aluminum alloy is affected by chip-flow and tool run-out. The tool run-out is made a cutting performance worse using small diameter tools. We clarified that the modification of tool setting angle in two-tooth square and ball endmilling reduced the influence of tool run-out on machining accuracy when we examined about cutting characteristics of micro endmills and a method for reducing the influence of tool run-out in the past. In addition, we considered that this modifying method for adapting the drilling of small-diameter holes. Therefore, we experimentally examined the influence of tool run-out on machining accuracy and cutting conditions with reamer that tool diameter is 3 mm. In this paper, we report results of a method for reducing the influence of tool run-out on machining accuracy with two - four tooth reamer by modifying the tool setting angle.