基于激光熔覆的车床主轴再制造

发布时间：2018-07-23 10:59

【摘要】：随着我国可持续发展重大战略的推进,蕴含着高附加值的损伤、退役机床再制造研究越来越受到重视,作为机床的核心部件之一,损伤主轴再制造成为机床再制造的关键。使用Nd∶YAG固体激光熔覆设备及FeCr合金粉料对损伤45钢主轴进行修复再制造研究,使用扫描电镜观察了熔覆层组织结构,通过显微硬度测试、摩擦磨损试验分析了熔覆层硬度及耐磨性,使用磨床对主轴熔覆层进行精密磨削加工。结果表明所得熔覆层无气孔裂纹等缺陷,其硬度达547HV0.1,相同负载条件下熔覆层耐磨性为基体材料的3.7倍;磨削加工后再制造主轴完全恢复至设计尺寸,经过相同服役时间后再制造主轴磨损量小于新品主轴磨损量,说明了车床主轴激光熔覆再制造的可行性及有效性。
[Abstract]:With the development of sustainable development strategy in our country, which contains the damage of high added value, more and more attention has been paid to the research on the remanufacturing of retired machine tools. As one of the core parts of machine tools, the damage spindle remanufacture becomes the key of machine tool remanufacturing. Using ND: YAG solid laser cladding equipment and FeCr alloy powder to repair and remanufacture the damaged 45 steel spindle, the microstructure of the coating was observed by scanning electron microscope, and the microhardness test was carried out. The hardness and wear resistance of the cladding layer were analyzed by friction and wear test. The results show that the cladding layer has no porosity and crack, its hardness is 547HV0.1, the wear resistance of the cladding layer is 3.7 times of that of the substrate under the same load, and the spindle is completely restored to the design size after grinding. After the same service time, the wear amount of the remanufactured spindle is less than that of the new spindle, which shows the feasibility and effectiveness of laser cladding remanufacturing of lathe spindle.
【作者单位】：山东大学机械工程学院高效洁净机械制造教育部重点实验室;枣庄科技职业学院机械工程系;
【基金】：国家重点基础研究发展计划(973计划)(2011CB013401) 山东省高等学校青年骨干教师国内访问学者项目
【分类号】：TG51

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