基于提高吸光率的无磁钢电火花毛化工艺研究
发布时间：2018-12-30 10:43
【摘要】：电火花毛化表面因其凹凸起伏的随机结构，对提高光吸收率起到了积极作用。本文通过对无磁钢表面进行电火花毛化处理，，研究了不同电火花毛化工艺参数对光吸收率的影响。 为了深入分析电火花毛化加工电参数对毛化形貌的影响，本文分别设计了小峰值电流、小脉冲宽度，小峰值电流、大脉冲宽度，大峰值电流、小脉冲宽度，大峰值电流、大脉冲宽度四组正交实验，并采用扫描电镜对毛化表面形貌进行观察。利用形貌测量仪对电火花毛化工件表面的高度均方根和相关长度进行了测量与计算，并分析了其变化规律。利用FDTD Solutions软件对不同表面形貌的毛化表面进行了可见光波段的吸光率仿真，最后利用集总参数量热法通过自搭建的量温实验平台对电火花毛化工件进行了吸光率测量，并对实验结果进行分析，总结了毛化形貌参数与吸光率的相互关系。 研究表明，随着峰值电流的增加，毛化表面凹坑平均直径递增，表面粗糙度先增后减；在脉冲宽度较小的情况下毛化表面粗糙度随着脉冲宽度的增加而增加，在脉冲宽度较大的情况下毛化表面粗糙度随着脉冲宽度的增加而减小；在脉冲宽度较大的情况下，随着加工时间的增加，高度均方根具有逐渐减小的趋势。在小电流、小脉冲宽度加工条件下，随着峰值电流的增加，高度均方根呈逐渐增大的趋势；在大电流小脉冲宽度加工条件下，随着脉冲宽度的增加，高度均方根呈逐渐增加的趋势；电加工参数对相关长度的影响相对来说比较复杂，对于不同的加工条件呈现出不同的加工规律。通过对光吸收率的测量发现，随着相关长度的增加，毛化表面对光吸收率逐渐减小，随着高度均方根与相关长度的比值的增加，毛化表面对光吸收率逐渐增加，在大峰值电流、大脉冲宽度的加工条件下，毛化表面对光吸收率有所下降。
[Abstract]:Because of its undulating random structure, EDM furifying surface plays a positive role in improving the light absorption rate. In this paper, the effect of different parameters of EDM on the light absorptivity of the surface of unmagnetized steel was studied by means of EDM. In order to analyze the effect of electrical parameters of EDM on the morphology of EDM, this paper designs the small peak current, the small pulse width, the small peak current, the large pulse width, the large peak current, the small pulse width, the large peak current, respectively. The surface morphology of wool was observed by scanning electron microscope (SEM). The RMS and the correlation length of the EDM textured workpiece surface were measured and calculated by means of a morphometric instrument, and the variation of the RMS and the correlation length were analyzed. Using FDTD Solutions software, the visible light absorption of the wool surface with different surface morphologies was simulated. Finally, the absorptivity of EDM wool was measured by means of the quantitative calorimetry method and the self-built temperature measurement platform. The experimental results were analyzed and the relationship between the texturing parameters and the absorptivity was summarized. The results show that the average diameter of the pits increases with the increase of peak current, and the surface roughness increases first and then decreases. When the pulse width is small, the surface roughness increases with the increase of pulse width, and decreases with the increase of pulse width. Under the condition of larger pulse width, the root mean square (RMS) of height decreases gradually with the increase of processing time. Under the condition of low current and small pulse width, the root mean square (RMS) of height increases with the increase of peak current. Under the condition of large current and small pulse width, the root mean square (RMS) of height increases with the increase of pulse width. The influence of electrical processing parameters on the relative length is relatively complex, and different processing conditions show different processing rules. Through the measurement of light absorption rate, it is found that with the increase of correlation length, the light absorption rate of the wool surface decreases gradually, and with the increase of the ratio of high RMS to correlation length, the light absorption rate of the wool surface increases gradually, and the light absorption rate increases with the increase of the peak current. Under the condition of large pulse width, the light absorption rate of the wool surface decreased.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U674.706
本文编号：2395472
[Abstract]:Because of its undulating random structure, EDM furifying surface plays a positive role in improving the light absorption rate. In this paper, the effect of different parameters of EDM on the light absorptivity of the surface of unmagnetized steel was studied by means of EDM. In order to analyze the effect of electrical parameters of EDM on the morphology of EDM, this paper designs the small peak current, the small pulse width, the small peak current, the large pulse width, the large peak current, the small pulse width, the large peak current, respectively. The surface morphology of wool was observed by scanning electron microscope (SEM). The RMS and the correlation length of the EDM textured workpiece surface were measured and calculated by means of a morphometric instrument, and the variation of the RMS and the correlation length were analyzed. Using FDTD Solutions software, the visible light absorption of the wool surface with different surface morphologies was simulated. Finally, the absorptivity of EDM wool was measured by means of the quantitative calorimetry method and the self-built temperature measurement platform. The experimental results were analyzed and the relationship between the texturing parameters and the absorptivity was summarized. The results show that the average diameter of the pits increases with the increase of peak current, and the surface roughness increases first and then decreases. When the pulse width is small, the surface roughness increases with the increase of pulse width, and decreases with the increase of pulse width. Under the condition of larger pulse width, the root mean square (RMS) of height decreases gradually with the increase of processing time. Under the condition of low current and small pulse width, the root mean square (RMS) of height increases with the increase of peak current. Under the condition of large current and small pulse width, the root mean square (RMS) of height increases with the increase of pulse width. The influence of electrical processing parameters on the relative length is relatively complex, and different processing conditions show different processing rules. Through the measurement of light absorption rate, it is found that with the increase of correlation length, the light absorption rate of the wool surface decreases gradually, and with the increase of the ratio of high RMS to correlation length, the light absorption rate of the wool surface increases gradually, and the light absorption rate increases with the increase of the peak current. Under the condition of large pulse width, the light absorption rate of the wool surface decreased.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U674.706
【参考文献】
相关期刊论文 前1条
1 徐小兵,毛利尚武;日本电火花加工技术的发展动态[J];电加工与模具;2003年01期
本文编号：2395472
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