金屬切削加工畢業(yè)設(shè)計(jì)外文翻譯-其他專(zhuān)業(yè)(編輯修改稿)
2025-02-24 01:32 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 the primary motion, leads to a repeated or continuous chip removal and the creation of the desired machined surface. The motion may proceed by steps or continuously. The feed speed vf is defined as the instantaneous velocity of the feed motion relative to the workpiece(at a selected point on the cutting edge) For turning and drilling, the feed f is measured per revolution (mm/rev) of the workpiece or the tool。 for planing and shaping f is measured per storke (mm/stroke) of the tool or the workpiece. In milling the feed is measured per tooth of the cutte f z (mm/touth)。 that is,fz is the displacement of the workpiece between the cutting action of two successive teeth。 The feed speed vf（ mm/min） of the table is therefore the product of the number of the teeth z of the cutter ,the revolutions per minute of the cutter n,and the feed per tooth (vf=nzfz) . A plane containing the directions of the primary motion and the feed motion is define as the working plane, since it contains the motions responsible for the cutting action. Depth of Cut (Engagement) In turning the depth of cut a (sometimes also called back engagement) is the distance that the cutting edge engages or projects below the original surface of the workpiece. The depth of cut determines the final dimensions of the workpiece. In turning, with an axial feed, the depth of cut is a direct measure of the decrease in radius of the workpiece and with radial feed the depth of cut is equal to the decrease in the length of workpiece. In drilling, the depth of cut is equal to the diameter of the drill. For milling, the depth of cut is defined as the working engagement ae and is
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