外文翻譯---數(shù)控機(jī)床開環(huán)控制伺服系統(tǒng)-數(shù)控設(shè)計(jì)-wenkub.com
2025-05-07 09:34 本頁面
【正文】 本文介紹了特征技術(shù)在零件信息建模中的應(yīng)用，重點(diǎn)描述該零件數(shù)據(jù)模型的數(shù)據(jù)庫實(shí)現(xiàn)；所建立的零件信息數(shù)據(jù)庫系統(tǒng)可以較好地滿足 CIMS 系統(tǒng)對信。這里的位置檢測不用作位置的反饋，而是作為位置誤差的補(bǔ)償反饋。圖 l 所示是一個(gè)實(shí)測的定位誤差曲線，把這個(gè)曲線的縱坐標(biāo) (誤差 )以脈沖當(dāng)量為單位進(jìn)行分割，作出橫線，每個(gè)橫線與曲線的交點(diǎn)即為目標(biāo)補(bǔ)償點(diǎn)。在該系統(tǒng)中主要使用現(xiàn)成的 CAD／ CAM 軟件 (Unigraphics 1I)進(jìn)行產(chǎn)品設(shè)計(jì)和 NC 編程，并通過對該軟件進(jìn)行二次開發(fā)獲取零件的尺寸信息；同時(shí)利用自行開發(fā)的對話窗體，讓設(shè)計(jì)人員交互輸入其它特征信息，實(shí)現(xiàn)該軟件與系統(tǒng)的共享數(shù)據(jù)庫的連接。特征層數(shù)據(jù)表集是本零件模型數(shù)據(jù)庫設(shè)計(jì)的核心，記錄了特征實(shí)例模型的設(shè)計(jì)、工藝等信息。這就影響了機(jī)床的加工精度， 即指令脈沖與實(shí)際進(jìn)給步數(shù)不相符合，產(chǎn)生加工誤差 因此，開環(huán)數(shù)控系統(tǒng)一般都設(shè)置有反向間隙誤差補(bǔ)償功能，用以補(bǔ)足空走的步數(shù)反向間隙差補(bǔ)償就是首先實(shí)測反向進(jìn)給的誤差，把它折算成脈沖當(dāng)量數(shù)，作為間隙補(bǔ)償子程序的輸出量，當(dāng)計(jì)算機(jī)判斷出現(xiàn)的指令為反向運(yùn)動(dòng)時(shí)，隨即調(diào)用間隙補(bǔ)償子程序，通過輸出補(bǔ)償脈沖消除反向間隙后再進(jìn)行正常的插補(bǔ)運(yùn)行 。下面幾種改進(jìn)措施可以使定位精度明顯改善。 How causes question and so on request which the characteristic design adoption trick recognition, the characteristic semantics transforms also to wait for the people to solve. This article introduced the characteristic technology in the ponents information modeling application, describes this ponents data model database realization with emphasis。 At the same time uses the dialogue window which develops voluntarily, lets design the personnel to input other characteristic information alternately, realizes this software and the system sharing database connection. When assistance technological design, the technological design personnel through the procedure inquiry function, inquires the ponents information from the sharing database which needs, carries on the interactive technological design. Thus has facilitated the CAPP ponents information acquisition, enhanced the technological design efficiency. When carries on the NC programming using UG, may from the sharing database gain the craft and the manufacture information which needs, carries on various working procedures the knife axle design and the processing simulation establishes an absolute zero spot on the numerical control engine bed, the actual various coordinate axes syzygy pletely position error, makes the curve in order to determined pensates the spot. Attempts l to show is an actual position error curve, (error) carries on this curve ycoordinate take the pulse equivalent as the unit the division, makes th
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