以激光向量技術(shù)進(jìn)行三維空間定位誤差測(cè)量與補(bǔ)償
具節(jié)距誤差補(bǔ)償?shù)乃臈l體對(duì)角線位移誤差,總誤差為95mm,只有較小的改善
具空間誤差補(bǔ)償?shù)乃臈l體對(duì)角線位移誤差,總誤差為12.5mm,改善了900%。VI. 討論與總結(jié)
總結(jié)前面所述,我們已在亞崴的立式切削中心上完成向量測(cè)量與空間補(bǔ)償,亞崴的立式切削中心的空間定位準(zhǔn)確度可獲得改善超過(guò)900%,在此可注意到如果只作節(jié)距誤差補(bǔ)償,則僅改善15%,因此只作節(jié)距誤差補(bǔ)償是不足夠的,能夠同時(shí)補(bǔ)償節(jié)距誤差及直線度誤差是相對(duì)重要的。
此外激光向量測(cè)量?jī)H需2到4小時(shí),大大取代了一般激光干涉儀需要20到40小時(shí)去測(cè)量的時(shí)間,激光架設(shè)相當(dāng)簡(jiǎn)單,并且資料可自動(dòng)采集,數(shù)據(jù)處理與補(bǔ)償文件產(chǎn)生皆為自動(dòng),排除手動(dòng)操作并減少誤差,因此毋需經(jīng)驗(yàn)豐富的工程師,機(jī)器操作者在接受訓(xùn)練后即可操作激光校驗(yàn)及校驗(yàn)。
參考文獻(xiàn)
[1] “Methods for Performance Evaluation of Computer Numerically Controlled Machining Centers” An American National Standard, ASME B5.54-1992 by the American Society of Mechanical Engineers, p69, 1992.
[2] C. Wang, “ Laser Vector measurement Technique for the determination and compensation of volumetric positioning errors. Part I: Basic theory”, Review of Scientific Instruments, Vol. 71, No 10, pp 3933-3937, October 2000.
[3] J. Jenecko, B. Griffin and C. Wang, “Laser Vector Measurement Technique for the determination and compensation of volumetric positioning errors. Part II: Experimental verification”, Review of Scientific Instruments, Vol. 71, No. 10, pp.3938-3941, October 2000. (end)
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