【導(dǎo)讀】車(chē)削很少在其他種類(lèi)的機(jī)床上進(jìn)行，而且任何一種其他機(jī)床。都不能像車(chē)床那樣方便地進(jìn)行車(chē)削加工。和鉸孔，車(chē)床的多功能性可以使工件在一次安裝中完成幾種加工。床身是車(chē)床的基礎(chǔ)件。它通常是由經(jīng)過(guò)充分正火或時(shí)效處理的。通常在床身上有內(nèi)外兩組平行的導(dǎo)軌。為了抵抗磨損和擦傷，大多數(shù)現(xiàn)代機(jī)床的導(dǎo)軌是經(jīng)過(guò)表面淬硬的，但是在操作時(shí)還應(yīng)該小心，以避免損傷導(dǎo)軌。常常意味著整個(gè)機(jī)床的精度遭到破壞。主軸箱安裝在內(nèi)側(cè)導(dǎo)軌的固定位置上，一般在床身的左端。提供動(dòng)力，并可使工件在各種速度下回轉(zhuǎn)。尺寸較大，通常安裝在預(yù)緊后的重型圓錐滾子軸承或球軸承中。尾架組件主要由三部分組成。三個(gè)組成部分是尾架套筒。英寸)之間的鋼制空心圓柱體。架體中縱向移人和移出幾英寸。普通車(chē)床的加工偏差主要依賴于操作者的技術(shù)熟練程度。六角車(chē)床可以獲得較高的質(zhì)量評(píng)定。為了在六角車(chē)床上獲得盡可能小的公差值，設(shè)計(jì)人。在希望獲得最大產(chǎn)量的大批量生產(chǎn)中，進(jìn)行直徑和長(zhǎng)度

　　

【正文】 rovides the cutting zone with new material. In turning the primary motion is provided by the rotation of the 11 workpiece, and in planing it is provided by the translation of the table。 in turning the feed motion is a continuous translation of the tool, and in planing it is an intermittent translation of the tool. The cutting speed v is the instantaneous velocity of the primary motion of the tool relative to the workpieee (at a selected point on the cutting edge). The cutting speed for turning, drilling, and milling processes can be expressed as v = ? dn m/min Where v is the cutting speed in m/min,d the diameter of the workpiece to be cut in meters, and n the workpiece or spindle rotation in rev/min. Thus v, d, and n may relate to the work material or the tool, depending on the specific kinematic pattern. In grinding the cutting speed is normally measured in m/s. The feed motion f is provided to the tool or the workpiece and, when added to 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 mining 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 stroke (mm/stroke) of the tool or the workpiece. In mining the feed is measured per tooth of the cutter f z(mm/tooth)。 that is, fzis the displacement of the workpiece between the cutting action of two successive teeth. The feed speed vf(mm/rain) of the table is therefore the product of the number of 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 defined as the working plane, since it contains the motions responsible for the cutting action. In turning the depth of cut a (sometimes also called back 12 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 taming, 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 the radial engagement of the cutter. The axial engagement (back engagement) of the cutter is called ap. The chip thickness hi in the undeformed state is the thickness of the chip measured perpendicular to the cutting edge and in a plane perpendicular to the direction of cutting. The chip thickness after cutting (i. e., the actual chip thickness h2) is larger than the undeformed chip thickness, which means that the cutting ratio or chip thickness ratio r =h1/h2 is always less than unity. Chip Width The chip width b in the tmdeformed state is the width of the chip measured alo ng the cutting edge in a plane perpendicular to the direction of cutting. For singlepoint too! operations, the area of cut A is the product of the undeformed chip thickness h l and the chip width b (., A = h1b). The area of cut can also be expressed by the feedf and the depth of cut a as follows: H1=f sink and b = a/sink Where k is the major cutting edge angle (i. e., the angle that the cutting edge forms with the working plane). Consequently, the area of cut is given by A =fa