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    • 1. 发明授权
    • Throwaway insert for ball end mill
    • 球头铣刀的抛丸刀片
    • US6024519A
    • 2000-02-15
    • US145761
    • 1998-09-02
    • Syoji OkuiShigenori EmotoAtuhiko MaetaKazuo MaedaJun Maeda
    • Syoji OkuiShigenori EmotoAtuhiko MaetaKazuo MaedaJun Maeda
    • B23C5/10B23C5/20
    • B23C5/1045Y10T407/192Y10T407/1924Y10T407/21Y10T407/23
    • A throwaway insert for a ball end mill having an ideal cutting edge shape corresponding to the cutting speeds and loads at different portions of the cutting edges, high in strength and capable of discharging chips smoothly. As viewed in a direction perpendicular to the line connecting noses, each cutting edge forms a convex curve with its nose portion at the lowest level. As viewed in a direction perpendicular to the abovesaid direction, rake faces form symmetrical, downwardly sloping convex accurate surfaces or straight surfaces having a positive rake angle of 5-25.degree.. The wedge angle at the cutting edges is set at 85-65.degree.. Thus, the rake angle will be negative at the noses and positive at other portions. Further, the rake angle increases toward the side where the cutting speed is higher. The thickness of the insert increases toward the side where the load is greater. Since this insert is a modification of a negative insert, i.e. an insert of the type having a side perpendicular to its bottom, it has enough strength. Chips can be discharged smoothly too.
    • 一种用于球头铣刀的一次性刀片,其具有对应于切削刃的不同部分处的切削速度和负载的理想切削刃形状,强度高并能平滑地排出切屑。 从垂直于连接鼻部的线的方向观察,每个切割刃形成凸起曲线,其鼻部部分处于最低水平。 从与上述方向垂直的方向观察,前刀面形成对称的,向下倾斜的凸形精确表面或具有5-25°的正前角的直线表面。 切削刃处的楔角设定在85-65°。 因此,前角在鼻部为负,其他部分为正。 此外,前角朝向切割速度较高的一侧增加。 插入件的厚度朝向负载较大的一侧增加。 由于该插入件是负插入件的改型,即具有与其底部垂直的一侧的插入件,其具有足够的强度。 芯片也可顺利放电。