數控機床相關畢業(yè)設計翻譯
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- IMPROVING ACCURACY OF CNC MACHINE
TOOLS THROUGH COMPENSATION
FOR THERMAL ERRORS
Abstract： A method for improving accuracy of CNC machine tools through compensation for the thermal errors is studied. The thermal errors are obtained by 1-D ball array and characterized by an auto regressive model based on spindle rotation speed. By revising the workpiece NC machining program , the thermal errors can be compensated before machining. The experiments on a vertical machining center show that the effectiveness of compensation is good.
Key words : CNC machine tool Thermal error Compensation
0 INTRODUCTION
Improvement of machine tool accuracy is essential to quality cont rol in manufacturing processes. Thermally induced errors have been recognized as the largest cont ributor to overall machine inaccuracy and are probably the most formidable obstacle to obtaining higher level of machine accuracy. Thermal errors of machine tools can be reduced by the st ructural improvement of the machine tool it self through design and manufacturing technology. However , there are many physical limitations to accuracy which can not be overcome solely by production and design techniques. So error compensation technology is necessary. In the past several years , significant effort s have been devoted to the study. Be數控機床相關畢業(yè)設計翻譯通過熱量誤差補償來改善數控機床的精確度
摘 要：通過熱量誤差補償來改變數控機床的精度是一種可行的方法。熱量誤差的獲得是通過1-D滾珠排列和建立在錠子轉速基礎上的自動退刀的表征。通過改變工件的數控程序，熱量誤差在機加工以前可以被補償。試驗表明直立的加工中心的實際補償是可行的。
關鍵詞： 數控加工中心, 熱量誤差,補償
0.引言：
數控機床精確度的改善是生產過程中質量控制的根本。熱量誤差已經被作為機器精確度失衡的最大誘因，而且可能也是機器獲取更高精確度的最大障礙。數控機床的熱量誤差可通過機床本身的結構設計和生產技術的改善而降低。盡管如此，還是有許多物理性限制因素使得精確度不能通過生產和設計技術而單獨克服。因此，誤差補償技術是很必要的。在過去的幾年里，對此技術的研究已經獲得重大成果。由于熱量誤差在加工時隨時間而變化，許多前人的工作都集中在實際時間...
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