數(shù)控機(jī)床相關(guān)畢業(yè)設(shè)計(jì)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(shù)控機(jī)床相關(guān)畢業(yè)設(shè)計(jì)翻譯通過(guò)熱量誤差補(bǔ)償來(lái)改善數(shù)控機(jī)床的精確度
摘 要：通過(guò)熱量誤差補(bǔ)償來(lái)改變數(shù)控機(jī)床的精度是一種可行的方法。熱量誤差的獲得是通過(guò)1-D滾珠排列和建立在錠子轉(zhuǎn)速基礎(chǔ)上的自動(dòng)退刀的表征。通過(guò)改變工件的數(shù)控程序，熱量誤差在機(jī)加工以前可以被補(bǔ)償。試驗(yàn)表明直立的加工中心的實(shí)際補(bǔ)償是可行的。
關(guān)鍵詞： 數(shù)控加工中心, 熱量誤差,補(bǔ)償
0.引言：
數(shù)控機(jī)床精確度的改善是生產(chǎn)過(guò)程中質(zhì)量控制的根本。熱量誤差已經(jīng)被作為機(jī)器精確度失衡的最大誘因，而且可能也是機(jī)器獲取更高精確度的最大障礙。數(shù)控機(jī)床的熱量誤差可通過(guò)機(jī)床本身的結(jié)構(gòu)設(shè)計(jì)和生產(chǎn)技術(shù)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(guò)生產(chǎn)和設(shè)計(jì)技術(shù)而單獨(dú)克服。因此，誤差補(bǔ)償技術(shù)是很必要的。在過(guò)去的幾年里，對(duì)此技術(shù)的研究已經(jīng)獲得重大成果。由于熱量誤差在加工時(shí)隨時(shí)間而變化，許多前人的工作都集中在實(shí)際時(shí)間...
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