In order improve the rock cutting efficiency of PDC cutter,a bionic non-smooth theory was applied to the surface shape design of the PDC cutter.With the similar simulation of the diamond surface shape with a wavy,delta and trapezium,the delta surface shape was optimal selected as the optimum structure.Based on the PDC cutter with a dimension of φ13.44 mm×8 mm as an example,the similar simulation was applied to the analysis on the delta groove number,three delta grooves were finally determined as the optimum.According to the optimized design plan determined,the different material and technical design were applied to process the bionic cutter of the four large saw tooth.With the micro drilling test rig,a drilling efficiency between the bionic PDC cutter and the plane PDC cutter was further compared and analyzed.The results showed that as the PDC cutter drilling efficiency of the large saw tooth was obviously better than the conventional plane piece,but a "collapsing piece" phenomenon could be easily occurred during the rock cutting process.In order to ensure the service life,the requirements of the material and processing technique should be higher than the conventional plane piece.%为了提高聚晶金刚石复合片(PDC)切削齿的破岩效率,将仿生非光滑理论应用到PDC切削齿的表面形态设计中,通过对波浪形、三角形和梯形金刚石层表面形态的仿真模拟,优选出三角形表面形态为最佳结构;以φ13.44 mm×8 mm的PDC切削齿为例,通过仿真模拟对三角形凹槽数量进行了分析,最终确定3个三角形凹槽为最佳;按照确定的优化设计方案,根据不同材料和工艺设计加工了4种大锯齿仿生PDC切削齿,通过微钻试验台进一步对比分析了仿生PDC切削齿与平面PDC切削齿的钻进效率.结果表明:大锯齿仿生PDC切削齿钻进效率明显优于普通平面片,但是破岩过程中容易出现“崩片”现象,为保证使用寿命,在材料和加工工艺方面应比普通平面片要求更高.
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