【摘要】：針對球面、非球面及自由曲面超精密磨削加工用圓弧形金剛石砂輪難以精密修整的問題,提出基于旋轉(zhuǎn)綠碳化硅(GC)磨棒的端部在位精密修整方法及修整過程的聲發(fā)射在線監(jiān)測技術�；趫A弧形金剛石砂輪的結(jié)構(gòu)特性,制訂圓弧形金剛石砂輪的在位精密修整與修整過程的聲發(fā)射在線監(jiān)測技術方案。依據(jù)修整與在線監(jiān)測方案,對D64圓弧形金剛石砂輪進行修整實驗及其聲發(fā)射信號采集,修整后跳動誤差小于10μm,比修整前減小30μm左右,砂輪精度顯著提高。利用聲發(fā)射信號均方根值獲取砂輪修整結(jié)束的特征預警閾值,實現(xiàn)了旋轉(zhuǎn)GC磨棒端部在位精密修整過程的在線監(jiān)測以及修整結(jié)束時間的準確判斷,可以有效提高球面非球面磨削加工過程的效率。
[Abstract]:Aiming at the problem that the circular arc diamond grinding wheel used in the ultra-precision grinding of spherical surface, aspherical surface and free-form surface is difficult to be trimmed precisely, An in situ precision dressing method based on rotating green silicon carbide (GC) grinding rod and an on line acoustic emission monitoring technique for the dressing process are proposed. Based on the structural characteristics of circular arc diamond grinding wheel, an on-line acoustic emission monitoring scheme for on-site precision dressing and dressing process of circular arc diamond grinding wheel is developed. According to the scheme of dressing and on-line monitoring, the dressing experiment and acoustic emission signal acquisition of D64 circular arc diamond grinding wheel are carried out. The runout error after dressing is less than 10 渭 m, which is about 30 渭 m less than that before dressing, and the precision of grinding wheel is improved significantly. Based on the root-mean-square value of acoustic emission signal, the characteristic warning threshold of finishing of grinding wheel is obtained, and the on-line monitoring of precision dressing process at the end of rotating GC grinding rod and the accurate judgment of finishing time are realized. It can effectively improve the efficiency of the grinding process of spherical aspherical surface.
【作者單位】： 湖南科技大學智能制造研究院;湖南科技大學難加工材料高效精密加工湖南省重點實驗室;廣西師范大學電子工程學院;湖南時變通訊科技有限公司;哈爾濱工業(yè)大學機電工程學院;
【基金】：國家自然科學基金資助項目(51705148) 湖南科技大學博士啟動基金資助項目(E56118);湖南科技大學難加工材料高效精密加工湖南省重點實驗室開放基金資助項目(E21755)
【分類號】：TG580.6

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