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这种金刚石钻头的结构如图所示。它主要有以下几部分组成:作为工作部分的环状轮圈6,由金刚石孕镶片所组成的起保径用的内外侧面21,水口槽26,钢体14,连接丝扣8。其中环状轮圈中6是由若干径向延伸组合片18组成,由隔片材料24在圆周方向上隔开,它们被整体结合在一起。各组合片18由一些金刚石孕镶片20组成,并由另一种隔片材料22径向交替隔开。金刚石孕镶片的耐磨性要比这种径向隔片材料大,以致后者的可控制磨损速率比金刚石孕镶片的磨损速率大。径向间隔物22的耐磨性要比这圆周方向间隔材料24大,以致后者的可控制磨损速率大于径向间隔物的磨损速率,但不致于大到会过早地暴露出组合片。这圆周间隔物对组合片有很好的导热性,并有相当大的韧性来缓冲钻进时的震动。这种金刚石钻头的最大特点是金刚石自锐性
The structure of this diamond bit is shown. It is mainly composed of the following parts: a ring-shaped rim 6 as a working part, an inner and outer side surface 21, a nozzle groove 26, a steel body 14 and a connecting thread buckle 8 which are formed by a diamond impregnated sheet. Wherein the annular rim 6 is comprised of a plurality of radially extending composite sheets 18 circumferentially spaced by a spacer material 24 which are integrally bonded together. Each of the composite sheets 18 is comprised of a plurality of diamond inlaid sheets 20 and is radially alternately spaced by another web material 22. Diamond implants are more abrasive than these radial septa materials so that the latter has a controlled wear rate that is greater than that of diamond implants. The radial spacer 22 has a greater wear resistance than the circumferentially spaced material 24 so that the latter has a controlled wear rate that is greater than the radial spacer wear rate but not so great that the composite sheet will be prematurely exposed. This circumferential spacer has good thermal conductivity of the composite sheet and has considerable toughness to cushion the vibration during drilling. The most prominent feature of this diamond bit diamond self-sharpening