仿生耦合孕镶金刚石钻头底唇面非光滑形态的优化

基于仿生耦合理论研制的仿生耦合孕镶金刚石钻头，在工作过程中，仿生单元的提前磨损，会在其底唇面上形成一定的非光滑表面形态，因此其具有钻进效率高和使用寿命长的优点。探讨了仿生单元的同心圆排列方式，即通过改变仿生单元之间的径向和周向距离，来形成一系列非光滑表面形态，然后加工相应的仿生耦合钻头，并进行室内钻进实验，结果表明，径向距离为1．5d（d为仿生单元直径）、周向距离为3．0d和径向距离为2．0d、周向距离为3．5d两种排列方式更能体现仿生耦合钻头高效率、长寿命的优点，相对普通钻头，其效率和寿命分别提高16％、100％和15％、125％。为以后仿生钻头的设计提供了重要依据。

Optimization of Non-smooth Arrangement of Bionic Coupling Impregnated Diamond Bit＇ s Crown

Since bionic non-smooth theory is used in drilling field, bionic impregnated diamond bits have great advantages in improving drilling efficiency and prolonging lifespan and the bionic bits mainly depend on the bionic non-smooth arrangement of bit＇ s crown. The bionic non-smooth arrangement is made of several bionic elements ; therefore according to circular arrangements of bionic elements, 13 different bits （including one common diamond bit） are designed and manufactured, each has different radial distance and circumferential distance. A series of experiments are conducted, it is showed that 2 bits （No. 4 and No. 11 ） have good performances which radial distances are 1.5d and 2. 0d （the d is the diameter of bionic element） and circumferential distances are 3.0d and 3.5d. Compared to the common impregnated diamond bit, penetration rate and lifesoan of No.4 are increased 16% and 100% and No. 11 is increased 15% and 125%.