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    • 11. 发明专利
    • Cooling channel geometry
    • 冷却通道几何
    • JP2011121173A
    • 2011-06-23
    • JP2011023007
    • 2011-02-04
    • Guehring Joergギューリング,イェルクGUEHRING,Joerg
    • KLEINER GILBERT
    • B23B51/06B23C5/28
    • B23B51/06
    • PROBLEM TO BE SOLVED: To provide an internally cooling type drilling tool that improves a flow rate of cooling water as well as durability to breakage, pressure, twisting, and bending. SOLUTION: An inner cooling channel 3 is formed on each web 2 of the drilling tool. The cooling channel extends from the tip of the tool to an opposite drill end and has a continuously extending cross-sectional contour 30 enclosing an imaginary circle K with a center point M. The cross-sectional contour 30 of the inner cooling channel 3 preferably comprises two maximum curvature values whose distance to the drill axis A is greater in the direction of a line between the center point M and the drill axis A or equal to the distance of the center point M to the drill axis A. The minimum wall thicknesses exist between the inner cooling channel 3 and the outer periphery of the drill 7, between the inner cooling channel 3 and the machined surface 5 and between the inner cooling channel 3 and the non-machined surface 6, ranging from a minimum threshold to a maximum threshold. The lower and upper thresholds, along with the geometry of the internal cooling channel, are optimized in relation to the through-flow of coolant and to the stability of the tool. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种内部冷却型钻具,其提高冷却水的流量以及破裂,压力,扭转和弯曲的耐久性。 解决方案:内部冷却通道3形成在钻具的每个卷材2上。 冷却通道从工具的尖端延伸到相对的钻头端,并且具有包围具有中心点M的假想圆K的连续延伸的横截面轮廓30.内部冷却通道3的横截面轮廓30优选地包括 两个最大曲率值,其距离钻头轴线A的距离在中心点M和钻孔轴线A之间的线的方向上较大,或等于中心点M到钻井轴线A的距离。存在最小壁厚 在内部冷却通道3和钻子7的外周之间,在内部冷却通道3和加工表面5之间以及内部冷却通道3和非加工表面6之间,从最小阈值到最大阈值 。 下限和上限阈值以及内部冷却通道的几何形状相对于冷却剂的通流和工具的稳定性进行了优化。 版权所有(C)2011,JPO&INPIT