内燃机缸套-活塞环摩擦副激光表面微造型模拟与试验研究

发布时间：2018-04-10 03:33

本文选题：内燃机　切入点：缸套-活塞环　出处：《内燃机工程》2016年04期

【摘要】：以内燃机缸套-活塞环摩擦副系统为对象,对单脉冲同点间隔多次激光微造型的热作用过程进行数值模拟和试验研究,获得了激光脉冲次数和激光功率对45#钢靶材表面微凹腔形貌的影响规律。仿真和试验结果表明:随着激光脉冲次数的增加,微凹腔深度不断增加,金属熔液的重铸现象明显,表面加工质量下降;随激光功率的增加,微凹腔的深度增加幅度不大且趋于平缓,微凹腔外沿金属残渣增多,加工质量下降,光斑中心温度近似线性增加;在相同工况条件下,微凹腔的深度仿真结果与试验结果趋势基本一致,最大误差在8%以内,证明了该数值模拟方法的可行性和有效性。
[Abstract]:The cylinder piston ring friction pair system as the research object, numerical simulation and experimental study on thermal process of single pulse interval of laser texturing, obtaining the effect of laser pulse frequency and laser power on 45# steel target surface micro cavity morphology. Simulation and experimental results show that with the increasing of laser pulse the number of micro cavity depth increasing, recasting the molten metal was decreased, the surface processing quality; with the increase of laser power, the depth of the micro cavity increase slightly and slowly increased, micro cavity outer metal residue, processing quality decreased, the spot center temperature is similar to linear increase in the same working conditions; under the micro cavity depth simulation results agree with experimental results, the maximum error is less than 8%, to prove the feasibility of the numerical simulation and the effectiveness of the method.

【作者单位】：江苏大学汽车与交通工程学院;江苏大学机械工程学院;
【基金】：国家自然科学基金项目(51375213,51175233) 江苏高校优势学科建设工程资助项目(PAPD) 江苏省博士后科研资助计划项目(1201036C) 江苏省光子制造科学与技术重点试验室(江苏大学)项目(GZ201211)
【分类号】：TK403

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