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激光微织构发动机缸孔的后处理工艺研究 被引量:1
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作者 康正阳 符永宏 +1 位作者 华希俊 葛汉青 《机械科学与技术》 CSCD 北大核心 2015年第7期1040-1043,共4页
针对激光微织构技术在工件表面附带形成重铸层,影响工件表面质量的问题,基于激光脉冲功率分布曲线分析了重铸层的形成机理及特性;采用"单脉冲同点间隔多次"优化工艺抑制了重铸层的形成。确定了针对发动机缸孔的后处理工艺:第... 针对激光微织构技术在工件表面附带形成重铸层,影响工件表面质量的问题,基于激光脉冲功率分布曲线分析了重铸层的形成机理及特性;采用"单脉冲同点间隔多次"优化工艺抑制了重铸层的形成。确定了针对发动机缸孔的后处理工艺:第一阶段中软砂条去除重铸层余量15 s,第二阶段超软砂条修复织构表面的抛光工艺20 s。珩磨头定压进给约1.5 MPa。结果表明:该工艺能高效、稳定的去除灰铸铁缸孔表面凹腔激光微织构的重铸层,表面Rpk值显著降低,对微织构形貌及未织构化区域均无破坏。 展开更多
关键词 发动机缸孔 激光微织构 重铸层 抛光工艺 精珩工艺
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Improving the Shape Accuracy by Simulating the Short-Stroke Honing Process
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作者 Sebastian Goeke Evelyn Wurz Dirk Biermann 《Journal of Mechanics Engineering and Automation》 2012年第8期507-513,共7页
This study represents an approach to investigate a force controlled short-stroke honing process and especially the dependency between the type of finishing tool and the resulting shape accuracy. Based on a finite elem... This study represents an approach to investigate a force controlled short-stroke honing process and especially the dependency between the type of finishing tool and the resulting shape accuracy. Based on a finite element analysis and a validation with special pressure measurement films, the contact mechanisms between the finishing tool and the workpiece are analyzed. In order to achieve a high surface quality without reducing the shape accuracy, the influence of different finishing tools with an individual material behavior on the resulting shape accuracy have been analyzed. With a variation of the geometry of the finishing tool as well as of the workpiece, different loading cases between the tool and the workpiece are considered in the finite element simulation. These results, combined with experimental investigations with different finishing films lead to an improvement of the surface quality without reducing the shape accuracy. 展开更多
关键词 FINISHING microfinishing finite element analysis surface structure shape accuracy.
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