Exploring Post-processing of Laser Cylinder Surface Texturing
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摘要: 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。Abstract: The laser surface texturing technology forms a negative recast layer. This paper analyzed its formation process and characteristics based on the laser beam power distribution curve. The paper implemented the single pulse intervals method to suppress the recast layer generation and then determined the following post-processes: polishing with medium-soft oilstones in the removal stage, processing time is 15 s; with super-soft oilstones in the recovery stage, processing time is 20 s. Honing pressure is 1.5 MPa. The results show that the post-processing can remove the recast layer effectively and steadily, the micro-structure and the non-texturing surface are non-destructive as well.
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Key words:
- cylinder hole /
- design of experiments /
- efficiency /
- experiments /
- grinding (machining)
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