碳化钛材料ELID磨削加工机理及工艺实验研究

Experimental Research on ELID Grinding Mechanism and Technology of Titanium Carbide Material

碳化钛新型材料因高硬度、高耐磨性及高化学稳定性等特点被应用到金属复合材料制造以及表面喷涂等方面,其常规磨削方式存在加工效率低、表面质量差、成本高及磨具损耗大的问题。采用ELID磨削技术对碳化钛进行精密磨削加工实验,以二次通用旋转法设计实验,探究加工工艺参数对碳化钛样件表面粗糙度的影响规律。采用DPS软件对实验数据进行分析并建立数学模型,借助MATLAB软件计算出最佳理论工艺参数组合,通过实验对其进行修正和完善,得出实际最佳工艺参数组合为:砂轮进给量1μm,砂轮线速度30m/s,电解电流12.3A,电解间隙1.1mm。在此参数下对碳化钛进行ELID磨削加工,获得样件的表面粗糙度值为246nm,相比于常规磨削方式,样件的表面质量提高14.6%,加工时间缩短36.7%,砂轮损耗率降低53.2%,整体加工效率提高100%以上。

Titanium carbide has been applied to the manufacturing of metal composite materials and surface spraying due to its high hardness,high wear resistance and high chemical stability.The conventional grinding method has the problems of low processing efficiency,poor surface quality,high cost and large wear loss of grinding tools.Experimental study on precision grinding of titanium carbide is carried out by ELID grinding technology.The influence of processing parameters on surface roughness of titanium carbide samples is investigated by quadratic general rotation method.DPS software is used to analyze the experimental data and establish the mathematical model.MATLAB software is used to calculate the optimal combination of theoretical process parameters,which are corrected and improved through experiments.ELID grinding of titanium carbide is carried out with the actual optimum process parameters:grinding wheel feed of 1μm,grinding wheel linear velocity of 30m/s,electrolysis current of 12.3A and electrolysis gap of 1.1mm,surface roughness of 246nm.Compared with the conventional method,the surface quality is increased by 14.6%,the processing time is shortened by 36.7%,the wheel wear rate is reduced by 53.2%,and the overall processing efficiency is increased by more than 100%.