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    • 8. 发明申请
    • CUTTING TIP AND CUTTING BIT HAVING INCREASED STRENGTH AND PENETRATION CAPABILITY
    • 具有提高强度和渗透能力的切割头和切割头
    • WO2013000798A1
    • 2013-01-03
    • PCT/EP2012/061902
    • 2012-06-21
    • SANDVIK INTELLECTUAL PROPERTY ABFADER, JosephLAMMER, Alfred
    • FADER, JosephLAMMER, Alfred
    • E21C35/18E21C35/183
    • E21C35/18E21C35/183
    • A cutting tip, presenting a generally conical body (10), symmetric about a center axis (A) and presenting a profile in a longitudinal section, the said profile comprising a generally convex portion (Pcx), and a generally concave portion (Pcv), The profile of at least one of the generally concave portion (Pcv) and the generally convex portion (Pcx) comprises a first linear portion (LP1, LP5), defined by a portion of a first line, which first line extends from a first point (P1, P12) at an angle of about 45 degrees relative to the center axis (A), to a second point (P2, P11) axially spaced from the first point (P1, P12), and a second linear portion (LP2), defined by a portion of a second line, which second line extends from a third point (P3, P10), forming an approximate middle point of the first line, to a fourth point (P4, P9) at the second radial position and at an axial distance from the second point (P2, P11) corresponding to about half a length of the first line.
    • 切割尖端,呈现大致圆锥形的本体(10),围绕中心轴线(A)对称并呈现纵向截面的轮廓,所述轮廓包括大致凸形部分(Pcx)和大体上凹陷部分(Pcv) 大致凹部(Pcv)和大致凸部(Pcx)中的至少一个的轮廓包括由第一线的一部分限定的第一直线部分(LP1,LP5),该第一直线部分(LP1,LP5) (P1,P12)相对于中心轴线(A)以大约45度的角度延伸到与第一点(P1,P12)轴向间隔开的第二点(P2,P11)和第二直线部分(LP2 ),其由第二线的一部分限定,该第二线从第三点(P3,P10)延伸,形成第一线的大致中点到第二径向位置处的第四点(P4,P9),以及 与第二点(P2,P11)的轴向距离对应于第一线的大约一半的长度。