Manufacturing Technology Of Nano-Ceramic Scalpel Based On Performance Of Oxide Film Of ELID Grinding Wheel

Nano-ceramics materials have many advantages,such as high temperature resistance,wear resistance,corrosion resistance,light weight and so on,which has been applied in many fields such as medicine,materials engineering and mechanical engineering.As a hard and brittle material,ceramics are difficult to machine,and have low processing efficiency.At present,ELID grinding technology is a kind of relatively mature,widely used brittle materials processing methods.The main purpose of this paper is to explore the feasibility of using nano-ceramic materials to make medical scalpels.First,the performance of oxide films on iron-based and copper-based grinding wheels in the ELID grinding process was experimentally studied,and choose the type of grinding wheel used in the processing of the ceramic scalpel according to the experimental results.Then use the ELID grinding technology to carry out surface grinding experiments on nano-ceramic workpieces,study the influence of parameters on grinding force and surface quality,and select the process parameters of ceramic scalpels according to the experimental results.Finally,processing nano-ceramic scalpels and performing simple project inspections.This paper focuses on the following aspects:First of all,in this paper,the existence of adsorbed water and lattice water in the oxide film on ELID grinding wheel and its two-step cooling mechanism in grinding zone are experimentally studied.In the meantime,the influence of the change of composition in the oxide film on the surface quality is theoretically discussed.The results show that the adsorbed water and lattice water do exist in the oxide film and can reduce the grinding temperature to a certain degree,which is good for obtaining excellent grinding surface quality.Secondly,the mechanical properties of the oxide film on ELID electrolytic copperbased grinding wheel were studied by nanoindentation.The results show that the oxide film of copper based grinding wheel has different characteristics from the substrate.The stiffness of copper based grinding wheel oxide film is 0.6-1.3 mN / nm,which is weaker than that of the base,and the stiffness is changed.The hardness of the oxide film is 2000-2300 MPa,higher than that of the substrate,and the elastic modulus is 100-120 GPa,higher than that of the substrate.Then,in order to meet the requirements of ELID grinding,the precision dressing of the iron base diamond grinding wheel is carried out to reduce the roundness error of the grinding wheel to about 2?m.A grinding experiment of nano zirconia ceramics was carried out on a surface grinder,used grinding force dynamometer and surface roughness meter measured force change and surface roughness,and analyzes the influence of grinding depth,workpiece speed,grinding wheel granularity on grinding force and surface roughness.Last,choose the appropriate grinding wheel and reasonable parameters according to the contents of the previous chapters,using ELID grinding technology to process nano zirconia ceramics into medical surgical blades,and it's practicality were tested and analyzed.