J4 ›› 2016, Vol. 13 ›› Issue (4): 659-668.doi: 10.1016/S1672-6529(16)60337-2
Effects of Bionic Units in Different Scales on the Wear Behavior of Bionic Impregnated Diamond Bits
Zhaozhi Wang1,2, Ke Gao1,2,3, Youhong Sun3, Zhihui Zhang1,2, Shiyu Zhang1,2,Yunhong Liang1,2, Xiujuan Li1,2, Luquan Ren1,2
- 1. Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun 130022, China
2. College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
3. College of Construction Engineering, Jilin University, Changchun 130026, China
Effects of Bionic Units in Different Scales on the Wear Behavior of Bionic Impregnated Diamond Bits
Zhaozhi Wang1,2, Ke Gao1,2,3, Youhong Sun3, Zhihui Zhang1,2, Shiyu Zhang1,2,Yunhong Liang1,2, Xiujuan Li1,2, Luquan Ren1,2
- 1. Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun 130022, China
2. College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
3. College of Construction Engineering, Jilin University, Changchun 130026, China
摘要：
Based on anti-wear theory of soil animals, the samples of impregnated diamond bit with bionic self-regenerated non-smooth surface were designed and fabricated. Such a bionic surface was characterized by concave-shape units of different scales that continuously maintained their shape and function during the whole working process. Abrasion tests were carried out to investigate the performance of samples. Results showed that the bionic samples exhibit excellent wear resistance and drilling performance under the action of bionic self-regenerated units, especially those with units of 2 mm – 3 mm diameter. The particle-trapping mechanism coming from the self-regenerated concaves and the lubricating mechanism coming from the continuously self-supplying of solid lubricant are important reasons for reducing or even avoiding the severe abrasions. The improved drilling performance of bionic samples derives from, on the one hand, the back edge of bionic unit that contributes to exposing new diamond and supplying additional shear stresses to increase the cutting ability, on the other hand, the enhanced load per unit area due to the decreased contact area at the frictional interface. The relationship between the wear behavior and the scale of bionic unit was revealed. The unit of smaller scale on the bionic samples can enhance the shear stress level. Further reducing the scale to a contain extent will diminish the wear resistance of sample. While increasing the scale can lead to the poor lubricating effect.