钨合金精密磨削砂轮磨损及对表面质量的影响机制

Wheel Wear of Tungsten Heavy Alloy Precision Grinding and Its Influence Mechanism on Surface Quality

为了满足钨合金零件的高精度和高完整性表面加工需求,实现钨合金磨削质量的控制和加工工艺的优化,通过分析砂轮磨粒种类和结合剂类型对砂轮磨损形式的关系,明确了超硬磨料砂轮在钨合金磨削加工中的优势.研究了磨粒粒度和磨削参数对钨合金磨削加工质量的影响规律,为制定合理的磨削工艺提供依据.通过磨削试验获得钨合金高精度和高完整性表面磨削加工工艺.研究结果表明,钨合金磨削过程中砂轮易磨损,超硬磨料砂轮更适合钨合金的磨削加工.金属结合剂金刚石砂轮在钨合金磨削加工的表面质量和加工精度方面表现出优越性.通过改进磨削参数,钨合金精密磨削后表面粗糙度可达18.9nm,实现了镜面磨削效果.

To meet the demand for high-precision and high-integrity surface machining of tungsten alloy parts,this paper carries out systematic research to achieve the control of tungsten alloy grinding quality and the optimization of the machining process.The impact of grinding wheel grit type and bond type on the form of grinding wheel wear was analyzed,and the advantages of super-hard abrasive in tungsten alloy grinding processing were clarified.The influence law of abrasive grain size and grinding parameters on the quality of tungsten alloy grinding processing was investigated,which provided a basis for the development of a reasonable grinding process.Finally,the high-precision and high-integrity surface grinding process of tungsten alloy was obtained through the grinding test.The results show that the grinding wheel of tungsten alloy is easy to wear during the grinding process,and the super-hard abrasive grinding wheel is more suitable for the grinding processing of tungsten alloy.Metal-bonded diamond wheels showed superiority in the comprehensive consideration of surface quality and machining accuracy of tungsten alloy grinding processing.By improving the grinding parameters,a surface roughness of 18.9 nm after precision grinding of tungsten alloy was realized,and a mirror grinding effect was achieved.