【摘要】：為準(zhǔn)確地獲取銑刀刀尖點(diǎn)頻響函數(shù),提出一種基于銑刀精確建模的刀尖點(diǎn)頻響函數(shù)的預(yù)測(cè)方法。該方法基于RCSA理論和Timoshenko梁理論,將機(jī)床-主軸-刀柄-刀具系統(tǒng)劃分為機(jī)床-主軸-刀柄-部分刀桿和剩余銑刀兩個(gè)部分,并將剩余銑刀細(xì)分為剩余刀桿、過(guò)渡段以及多段刀齒。將銑刀分為對(duì)稱(chēng)型銑刀和非對(duì)稱(chēng)型銑刀兩類(lèi),并針對(duì)每類(lèi)銑刀各部分分別進(jìn)行精確建模。以多把2刃和4刃銑刀為研究對(duì)象,進(jìn)行實(shí)驗(yàn)測(cè)試,比較本文方法、等效質(zhì)量法預(yù)測(cè)的銑刀刀尖點(diǎn)頻響函數(shù)與實(shí)測(cè)刀尖點(diǎn)頻響函數(shù)之間的差異,分析結(jié)果表明:該方法比等效質(zhì)量法具有更高的預(yù)測(cè)精度,所預(yù)測(cè)頻響函數(shù)的固有頻率與實(shí)測(cè)頻響函數(shù)固有頻率的相對(duì)誤差在5%以內(nèi)。
[Abstract]:In order to obtain the tip frequency response function of milling cutter accurately, a prediction method of tool tip frequency response function based on accurate modeling of milling cutter is proposed. Based on RCSA theory and Timoshenko beam theory, the machine tool-spindle-tool shank-cutter system is divided into two parts: machine tool-spindle-tool handle-part tool rod and residual milling cutter, and the remaining milling cutter is subdivided into residual cutter rod. Transition section and multi-section cutter teeth. The milling cutters are divided into symmetrical milling cutters and asymmetric milling cutters, and the accurate modeling of each part of each kind of milling cutter is carried out. Taking two-edge and four-edge milling cutters as research objects, experimental tests are carried out to compare the difference between the frequency response function of milling cutter tip point predicted by the equivalent mass method and the measured tool point frequency response function, and the difference between this method and the measured tool point frequency response function is compared with that of the method in this paper. The analysis results show that this method has higher prediction accuracy than the equivalent mass method, and the relative error between the natural frequency of the predicted frequency response function and the natural frequency of the measured frequency response function is less than 5%.
【作者單位】： 上海理工大學(xué)機(jī)械工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(50975179) 上海市教委科研創(chuàng)新項(xiàng)目(11ZZ136) 上海市科委科研計(jì)劃項(xiàng)目(13160502500) 滬江基金(D14005)
【分類(lèi)號(hào)】：TG714

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