聚碳酸酯红外激光抛光工艺的研究
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摘要
利用激光作用的一维热传导模型进行数值计算,在确定聚碳酸酯(PC)表面抛光所需要的功率密度为10~4 W/cm~2数量级的条件下,比较了不同的激光扫描速度对聚碳酸酯表面抛光效果的影响。结果表明,最优抛光参数为:离焦量正5 cm,峰值功率密度3.1×10~4 w/cm~2,扫描速度20 mm/s,此时可以将PC样品的表面粗糙度由5μm降至2μm,而不会使样品变质。随着激光扫描次数的增加,样品的表面粗糙度进一步下降,并在扫描10次左右达到最小值。这一结果对降低PC表面的粗糙度具有指导意义。
The numeral calculations of laser action was carried out by using one-dimensional heat conduction model. Different polishing effect on polycarbonate surface with different values of scanning speed were compared on the condition that the range of the laser power density for polycarbonate polishing was in the order of 10~4 W/cm~2. The results show that the optimal processing parameters are as follows: the defocusing amount is 5 cm, the peak power density is 3.1×10~4 w/cm~2, and the scanning speed is 20 mm/s, and the surface roughness of the PC sample can decrease from 5 μm to 2 μm without deterioration. With the increasing of the times of laser scanning, the surface roughness of the sample further decreased, and reached the minimum value around 10 times. The study is helpful for reducing the roughness of the PC surface.
The numeral calculations of laser action was carried out by using one-dimensional heat conduction model. Different polishing effect on polycarbonate surface with different values of scanning speed were compared on the condition that the range of the laser power density for polycarbonate polishing was in the order of 10~4 W/cm~2. The results show that the optimal processing parameters are as follows: the defocusing amount is 5 cm, the peak power density is 3.1×10~4 w/cm~2, and the scanning speed is 20 mm/s, and the surface roughness of the PC sample can decrease from 5 μm to 2 μm without deterioration. With the increasing of the times of laser scanning, the surface roughness of the sample further decreased, and reached the minimum value around 10 times. The study is helpful for reducing the roughness of the PC surface.
引文
[1] 戴伟,郑志镇,李建军等.金属材料表面的激光抛光研究进展[J].激光与光电子学进展,2015(11):7-20.
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[4] 那冉,陈涛.38CrMoAl表面YAG激光抛光技术研究[J].激光与光电子学进展,2016(1):149-155.
[5] LAMIKIZ A,SANCHEZ J.A,LACALLE L,et al.Surface roughness improvement using laser-polishing techniques[J].Materials Science Forum,2006,526(12):217-222.
[6] 张峰烈.金属材料纳秒紫外脉冲激光微抛光理论与技术的研究[D].天津:天津大学,2011.
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[8] 赵蕗衣.聚碳酸酯抗热氧化稳定剂综述[J].浙江化工,1988(2):41-52.
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[10] 陆建.激光与材料相互作用物理学[M].北京:机械工业出版社,1996:65-80.
[11] 王乐妍.激光光致热塑成型效应及三维微结构制备新方法研究[D].杭州:浙江大学,2011.
[12] 钟欢欢.高透光性黑色塑料制备及其激光焊接性能研究[D].广州:华南理工大学,2015.
[2] LAMBARRI J,LEUNDA J,SORIANO C,et al.Laser surface smoothing of nickel-based superalloys.Physics Procedia,2013(41):255-265.
[3] HAFIZ A M K,BORDATCHEV E V,TUTUNEAF R O.Experimental analysis of applicability of a picosecond laser for micro-polishing of micromilled Inconel 718 superalloy[J].The International Journal of Advanced Manufacturing Technology,2014,70(9-12):1963-1978.
[4] 那冉,陈涛.38CrMoAl表面YAG激光抛光技术研究[J].激光与光电子学进展,2016(1):149-155.
[5] LAMIKIZ A,SANCHEZ J.A,LACALLE L,et al.Surface roughness improvement using laser-polishing techniques[J].Materials Science Forum,2006,526(12):217-222.
[6] 张峰烈.金属材料纳秒紫外脉冲激光微抛光理论与技术的研究[D].天津:天津大学,2011.
[7] 饶国瑛,南爱玲,杜振霞.聚碳酸酯结构及热稳定性研究[J].北京化工大学学报(自然科学版),1999,26(3):76-78.
[8] 赵蕗衣.聚碳酸酯抗热氧化稳定剂综述[J].浙江化工,1988(2):41-52.
[9] 中塑在线.塑料原料参数库-沙伯基础PC/1414[DB/OL].http://www.21cp.com/techpara/68029.htm,2016.7.
[10] 陆建.激光与材料相互作用物理学[M].北京:机械工业出版社,1996:65-80.
[11] 王乐妍.激光光致热塑成型效应及三维微结构制备新方法研究[D].杭州:浙江大学,2011.
[12] 钟欢欢.高透光性黑色塑料制备及其激光焊接性能研究[D].广州:华南理工大学,2015.