The spiral taper milling cutter is a special tool. When the back corner of the tool is sharpened, the diameter of the blade is large and the diameter of the small end is inconsistent. Therefore, the back angle of the tool has large and small differences, and the blade width is narrow and inconsistent, which reduces the tool. Cutting performance. The reason for this is shown in Fig. 1, because sinα = (2H) / D, sinβ = (2H) / d D ≠d, so α ≠β.
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