本文選題：多軸數(shù)控機(jī)床　切入點(diǎn)：在機(jī)測(cè)量　出處：《機(jī)械工程學(xué)報(bào)》2017年20期

【摘要】：多軸數(shù)控機(jī)床的在機(jī)測(cè)量會(huì)存在冗余運(yùn)動(dòng)自由度,由此導(dǎo)致一個(gè)測(cè)量任務(wù)會(huì)有多個(gè)與之對(duì)應(yīng)的伺服運(yùn)動(dòng)方案,而確定最優(yōu)的伺服運(yùn)動(dòng)方案,是保證在機(jī)測(cè)量性能的前提。針對(duì)這一問(wèn)題,提出一種基于機(jī)床功能且面向測(cè)量任務(wù)的在機(jī)測(cè)量運(yùn)動(dòng)方案創(chuàng)成方法:采用多體系統(tǒng)理論及齊次坐標(biāo)變換方法對(duì)被測(cè)對(duì)象的幾何特征及數(shù)控機(jī)床的運(yùn)動(dòng)形式進(jìn)行數(shù)學(xué)解析;建立以被測(cè)幾何特征為自變量、以機(jī)床伺服運(yùn)動(dòng)為因變量的函數(shù)方程;求解該方程獲得所有可能的測(cè)量運(yùn)動(dòng)方案。在此基礎(chǔ)上,通過(guò)分析方程解的取值范圍,驗(yàn)證所有測(cè)量運(yùn)動(dòng)方案的功能;考慮到數(shù)控機(jī)床的結(jié)構(gòu)及伺服特性對(duì)測(cè)量精度的影響,提出了測(cè)量方案性能評(píng)價(jià)準(zhǔn)則,并據(jù)此確定最優(yōu)的測(cè)量方案。在某數(shù)控成形砂輪磨齒機(jī)上進(jìn)行了齒形偏差的在機(jī)測(cè)量,試驗(yàn)結(jié)果驗(yàn)證了該方法的有效性和可行性。利用該方法確定的最優(yōu)在機(jī)測(cè)量方案測(cè)量精度高、重復(fù)性好。
[Abstract]:There will be redundant motion degrees of freedom in the measurement of multi-axis NC machine tools, which leads to the existence of multiple servo motion schemes corresponding to a single measurement task, and the determination of the optimal servo motion scheme is the prerequisite to ensure the performance of in-machine measurement.In response to this problem,Based on the function of machine tool and oriented to measurement task, this paper presents a method of generating motion scheme for in-machine measurement. The geometric characteristics of the object under test and the motion form of NC machine tool are analyzed by using the theory of multi-body system and the method of homogeneous coordinate transformation.A function equation with geometric characteristics of measured as independent variable and servo motion of machine tool as dependent variable is established, and all possible measurement schemes are obtained by solving the equation.On this basis, the function of all measurement schemes is verified by analyzing the range of the solution of the equation, and considering the influence of the structure and servo characteristics of the NC machine tools on the measurement accuracy, the performance evaluation criteria of the measurement schemes are proposed.Based on this, the optimal measurement scheme is determined.The in-situ measurement of tooth profile deviation is carried out on a CNC grinding wheel grinding machine. The experimental results show that the method is effective and feasible.The optimal in-machine measurement scheme determined by this method has high measurement accuracy and good repeatability.
【作者單位】： 西安理工大學(xué)機(jī)械與精密儀器工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51375382) 陜西省教育廳產(chǎn)業(yè)化培育(2013JC27) 西安理工大學(xué)博士創(chuàng)新基金(207-002j02)資助項(xiàng)目
【分類號(hào)】：TG659

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本文編號(hào)：1719159