チップ方式歯切り用総形フライスに関する研究

概要

論文の詳細を見る
In roughing of large module gears, high efficient gear cutting with a formed milling cutter is noticed. In this case, the milling cutter is an insert type with both negative top rake and side rake angles. It is well known that negative rake angles increase cutting force and produce undesirable cutting surfaces. In this paper, a design method of insert-type gear formed milling cutters with both positive top rake and side rake angles is proposed. Firstly, the profile of cutting edge is calculated from the axial profile of the cutter by giving the design parameters such as the top rake angle, side rake angle and cutting edge angle, and the shape of insert pocket for the cutter body is designed by giving the thickness, length and width of the insert. However, these obtained design parameters are not always available because interference between the flank face and the work may occur. Therefore, a simulator that can interactively decide these design parameters was developed. Finally, the formed milling cutter were designed and made using the proposed method. Cutting tests using the trial-made milling cutter were carried out. As the results, the sufficient accuracy as the cutter in roughing of large module gears was obtained.