數(shù)控專業(yè)外文翻譯---寬槽圓柱凸輪數(shù)控加工技術(shù)的研究-數(shù)控設(shè)計-預(yù)覽頁
【正文】 example the numerical control engine bed host axle neck is 7: 24 40 inner cones, uses for parts JT40 the tool system, then most greatly only can use φ20mm end mill (no matter straight handle bit holder). This regarding the trough width is the 38mm column cam (is processing cam which this article narrates) said is unable to process, must seek the new processing method. Under and analyzes the research according to the experience, introduced one kind is smaller than the cam path width end mill with the diameter to carry on the numerical control processing to the column cam path the method, calls it the width trough column cam numerical control processing. First, Processing craft The column cam path is surrounds in the round cylinder and so on the width trough, when its processing often is bigger than 360176。 According to the processing working procedure, changes in each working procedure in turn trough width Bi, then extracts the processing to need the trough cavity all knives position path to launch the curve. cam path middle line processing coordinates transformation method Above the putation is launches in the plane in the round cylinder to carry on, in order to extract the processing column cam path cavity the knife position path, must launch the plane in the curve to transform to the round cylinder in. The supposition rotating axis for circles Xaxis A axis, pi is in a knife position path knife position spot, it launches in the curve in the twodimensional surface the coordinates for (x,s), on four coordinates engine beds coordinates is (x,y,z,a). Because the column cam path cavity usually is and so on deep, therefore, the z coordinates in establish after depths which needs to process, in the processing is invariable。, when is the cam path middle line and the column spool thread parallel, the angle error achieved biggest, this time the trough cavity trumpetshaped object phenomenon is most serious。 關(guān) 鍵詞 ： 數(shù)控加工 坐標(biāo)轉(zhuǎn)換 寬槽圓柱 凸輪 圓柱凸輪槽一般是按一定規(guī)律環(huán)繞在圓柱面上的等寬槽 。 據(jù)現(xiàn)有資料介 紹 ， 目前圓柱凸輪的銑削加工都是用這種辦法來實現(xiàn) 。即使有相應(yīng)的 刀具 ， 還要考慮機床主軸輸出功率及主軸和工裝夾具剛度的限制 ， 特別是機床主軸結(jié)構(gòu)對刀 具的限制 。 一、 加工工藝 圓柱凸輪槽是環(huán)繞在圓柱面上的等寬槽 ， 其加工時沿圓周表面銑削的范圍往 往大于 360176。 圓柱凸輪槽的底部在每一個截面 上通常是等深的，一般選用平底圓柱立銑 刀加工。下面討論任一加工工序中 展開曲線 XS 的求解方法，以及生成最后刀位軌跡的坐標(biāo)轉(zhuǎn)換方法。 由于圓柱凸輪槽 腔通常是等深的 ， 因此 ， z 坐標(biāo)在設(shè)置為所需要加工的深度值之后 ， 在加工中是 不變的；對于其余三個坐標(biāo)，構(gòu)造出以下坐標(biāo)轉(zhuǎn)換公式： (2) 式中 ， R 為圓柱凸輪軸的半 徑 。 仔細(xì)觀察 ， 原來加工出來的槽腔的法截面并不總是上下等寬 的矩形槽，而有時是上寬下窄的喇叭槽。 ， 也即凸輪槽中心線與圓柱軸線垂直 時 ， 角度誤 差為零 ， 即槽腔是上下等寬的矩形 口 ； 當(dāng)θ＝ 90176。 由上面的分析可知，公 式 (2)造成凸輪槽為上寬下窄喇叭口的主要原因 是 ， Pl 和 Pr 點對應(yīng)的轉(zhuǎn)角是按照這 兩個點自己的弧長值 Sl 和 Sr 來計算的，而 Sl 和 Sr 是不等于槽腔中心點 Po 的弧長值 So。 參 考文獻： W C, Van Y T. Researching Design Trens for the Redesign of Product . Design Studies , 2020, 24(2):173180. J, Liu C R. An error correction method for CNC machine tools using reference parts. Transactions of namre/sme, 1994. G P. The machine tool task forch. Bal Harbour Bal Habour Hotel, 1980. Feedback control of Dynamis . Systems, 4E 英文翻譯指導(dǎo)教師評閱意見 指導(dǎo)教師簽字： 年 月 日
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