【摘要】：電火花毛化表面因其凹凸起伏的隨機結構，對提高光吸收率起到了積極作用。本文通過對無磁鋼表面進行電火花毛化處理，，研究了不同電火花毛化工藝參數(shù)對光吸收率的影響。 為了深入分析電火花毛化加工電參數(shù)對毛化形貌的影響，本文分別設計了小峰值電流、小脈沖寬度，小峰值電流、大脈沖寬度，大峰值電流、小脈沖寬度，大峰值電流、大脈沖寬度四組正交實驗，并采用掃描電鏡對毛化表面形貌進行觀察。利用形貌測量儀對電火花毛化工件表面的高度均方根和相關長度進行了測量與計算，并分析了其變化規(guī)律。利用FDTD Solutions軟件對不同表面形貌的毛化表面進行了可見光波段的吸光率仿真，最后利用集總參數(shù)量熱法通過自搭建的量溫實驗平臺對電火花毛化工件進行了吸光率測量，并對實驗結果進行分析，總結了毛化形貌參數(shù)與吸光率的相互關系。 研究表明，隨著峰值電流的增加，毛化表面凹坑平均直徑遞增，表面粗糙度先增后減；在脈沖寬度較小的情況下毛化表面粗糙度隨著脈沖寬度的增加而增加，在脈沖寬度較大的情況下毛化表面粗糙度隨著脈沖寬度的增加而減��；在脈沖寬度較大的情況下，隨著加工時間的增加，高度均方根具有逐漸減小的趨勢。在小電流、小脈沖寬度加工條件下，隨著峰值電流的增加，高度均方根呈逐漸增大的趨勢；在大電流小脈沖寬度加工條件下，隨著脈沖寬度的增加，高度均方根呈逐漸增加的趨勢；電加工參數(shù)對相關長度的影響相對來說比較復雜，對于不同的加工條件呈現(xiàn)出不同的加工規(guī)律。通過對光吸收率的測量發(fā)現(xiàn)，隨著相關長度的增加，毛化表面對光吸收率逐漸減小，隨著高度均方根與相關長度的比值的增加，毛化表面對光吸收率逐漸增加，在大峰值電流、大脈沖寬度的加工條件下，毛化表面對光吸收率有所下降。
[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.
【學位授予單位】：華東交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U674.706

【參考文獻】

相關期刊論文 前1條

1 徐小兵,毛利尚武;日本電火花加工技術的發(fā)展動態(tài)[J];電加工與模具;2003年01期

本文編號：2395472