Grinding Mechanism and Mechanical Chemical Grinding Experiment of Binderless Tungsten Carbide at Different Linear Speeds
ZHANG Zhenyu 1，2 ，ZHOU Chunchen 1，FENG Junyuan 2，
1.Yantai Research Institute, Harbin Engineering University, Yantai 264006, China;
2. Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China
Abstract：Glass molding has now become a popular method for mass production of optical lens. As an excellent mold material, binderless tungsten carbide has high hardness, strength, conductivity and thermal conductivity. However, due to its high brittleness, the binderless tungsten carbide is prone to cracking and breaking during processing, which making it difficult to obtain good surface quality and shape accuracy. In this paper, a high-speed scratching experiment was performed on an ultraprecision single-point turning machine. Scratching under linear velocities of 1m/s, 5m/s, 10m/s， and 20m/s were used to study the influence mechanism of the linear velocity on the removing form of tungsten carbide. Then ultra-precision grinding of tungsten carbide was carried out to study the surface morphology and sub-surface damage. Moreover, mechanical chemical grinding fluid is introduced to study its positive effect on the ground surface morphology of tungsten carbide. A water-based grinding fluid containing mass fraction 1% silicon oxide nanoparticles and 3% hydrogen peroxide was adopted during grinding. Finally, the surface morphology from mechanical chemical grinding was observed.
2022, 
