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    • 4. 发明公开
    • BOHRKRONE
    • EP1415065A1
    • 2004-05-06
    • EP02759861.4
    • 2002-07-31
    • Techmo Entwicklungs- und Vertriebs GmbHPAUL WURTH S.A.
    • CLESEN, RomainTHILLER, GuyMOCIVNIK, Joseph
    • E21B10/56
    • E21B10/56
    • A drill crown (1) used for drilling purposes, especially for rotary percussion drilling of a mouth of a blast furnace. The drill crown (1) consists of a drilling head (4) provided with a plurality of hard material or hard metal inserts (6) and a base body (2) for connection to a drive element etc. in order to drive or impinge upon said drill crown. The hard material or hard metal inserts (6) are received in bores or openings (5) of the drill head (4). According to the invention, at least one hard material or hard metal insert (6) is provided with an at least partially curved or domed surface contour (11) on the end which is received in the drill head (4). Said contour cooperates with a complementary domed or curved surface of the drill head (4) and/or base body (2), whereby the percussive energy required for appropriate drilling power is transmitted in a reliable manner, even when the hard material or hard metal insert (6) is slackened.
    • 一种用于钻孔目的的钻头(1),特别是用于高炉口的旋转冲击钻孔。 钻头(1)由设有多个硬质材料或硬质金属嵌件(6)的钻头(4)和用于连接到驱动元件等的基体(2)构成,以驱动或撞击 所述钻头。 硬质材料或硬质金属嵌件(6)被接收在钻头(4)的钻孔或开口(5)中。 根据本发明,至少一个硬质材料或硬质金属插入物(6)在容纳在钻头(4)中的端部上设置有至少部分弯曲或圆顶形的表面轮廓(11)。 所述轮廓与钻头(4)和/或基体(2)的互补的圆顶或弯曲表面配合,由此即使在硬质材料或硬质金属的情况下也以可靠的方式传输适当钻孔力所需的冲击能量 插入物(6)松弛。