機械類車床外文翻譯(完整版)
【正文】 ce to the spindle. A workpiece may be bolted or screwed to a faceplate, a large flat disk that m A workpiece may be clamped in a chuck, which mounts directly to the spindle or mounted on a mandrel. In precision work (and in some classes of repetition work), cylindrical workpieces are invariably held in a collet inserted into the spindle and secured either by a drawbar, or by a collet closing cap on the spindle. Suitable collets may also be used to mount square or hexagonal workpieces. A circular metal plate with even spaced holes around the periphery, mounted to the spindle, is called an index plate. It can be used to rotate the spindle a precise number of degrees, then lock it in place, facilitating repeated auxiliary operations done to the workpiece. Modes of use When a workpiece is supported at both ends, it is more stable may be applied to the workpiece, via tools, at a right angle to the axis of rotation, without fear that the workpiece may break loose. When a workpiece is mounted with a certain axis of rotation, worked, then remounted with a new axis of rotation, this is referred to as eccentric turning or multi axis turning. The result is that various cross sections of the workpiece are rotationally symmetric, but the workpiece as a whole is not rotationally symmetric. This technique is used for camshafts, various types of chair legs, etc. Varieties The smallest lathes are jewelers lathes or watchmaker lathes, which are small enough that they may be held in one hand. Although the workpieces machined on a jeweler39。材料是 靠 一個或兩個中心 點保持位置不動 ，至少 其中 一 個 可 以水平 移動，以適應(yīng)不同材料的長度。踏板通常被連在一根直的幼苗桿上 。 車床的部分構(gòu)件 : 車床 或許有又或許沒有一個支撐架 ， 它直接被放在地板上， 提升車床 基座到 工作高度。住軸也許也有外部線程和內(nèi)部錐度或有一個手輪或其它配件在它們一端的外部電動機上。夾頭也許也用于固定方形或六角形工件。即使在制造珠寶的車床上加工的工件是金屬，它的切削工具不同于所有其它金屬加工車床的切削工具，是手持的，由一個支架支撐著，而不是固定在一個華東部件上。它們用在長度不是很長但直徑相對非常大的工件必須要車 削的時候。 各種組合都是可能的：例如，人們可以有一臺垂直數(shù)控車床（如數(shù)控車床 VIL）。 放在長凳上或桌子上的車床叫做“長凳車床”。它可用于旋轉(zhuǎn)軸到某個精度，然后鎖定到位，促進反復(fù)操作的工件的精度。 主 軸驅(qū)動，要么 靠來自 踏板和飛輪 的動力，要么靠連向
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1