專業(yè)夾具設(shè)計外文翻譯---副本(存儲版)
【正文】 桿式定心夾緊機構(gòu) 杠桿式三爪自定心卡盤中，滑套作軸向移動時，圓周均布的三個鉤形杠桿便繞軸轉(zhuǎn)動， 撥動三個滑塊沿徑向移動，從而帶動其上卡爪將工件定心并夾緊或松開。一般用于切削力不大、振動小、沒有離心力影響的加工中。因此常在頭部裝有擺動的壓塊。 （一）斜楔夾緊機構(gòu) 采用斜楔作為傳力元件或夾緊元件的夾緊機構(gòu)稱為斜楔夾緊機構(gòu)。 二、夾緊裝置的基本要求 在不破壞工件定位精度，并保證加工質(zhì)量的前提下，應盡量使夾緊裝置做到： 1．夾緊力的大小適當。由于手動夾具的夾緊力來自人力，所以它沒有動力裝置。本科生畢業(yè)設(shè)計 (論文)外 文 翻 譯原 文 標 題Precision Machining Technology譯 文 標 題精密機械加工工藝所在系別機械工程系所在專業(yè)機械設(shè)計制造及其自動化所在班級機本1007 姓 名艾鵬飛 學 號10201420742指導教師姓名鄧興貴指導教師職稱副教授完 成 時 間2014年5月23譯文標題 精密機械加工工藝原文標題Precision Machining Technology作 者Peter J. Hoffman譯 名彼得 2．夾緊部分 接受和傳遞原始作用力使之變?yōu)閵A緊力并執(zhí)行夾緊任務的部分，一般由下列機構(gòu)組成： 1）接受原始作用力的機構(gòu)。既要保證工件在整個加工過程中其位置穩(wěn)定不變、振動小，又要使工件不產(chǎn)生過大的夾緊變形。 直接采用斜楔夾緊時，斜楔的自鎖條件是：斜楔的升角小于斜楔與工件、斜 楔與夾具體之間的摩擦角之和。由于壓塊與工件間的摩擦力矩大于壓塊與螺釘間的摩擦力矩，壓塊不會隨螺釘一起轉(zhuǎn)動。 1．圓偏心輪的工作原理 2．圓偏心輪的夾緊行程及工作段 3．偏心輪的自鎖條件 推導得： f1≥ 2e／D 當 f= 時，e／D ≥20 當 f= 時，e／D ≥14 四、定心夾緊機構(gòu) 當工件被加工面以中心要素（軸線、中心平面等）為工序基準時，為使基準重合以減少定位誤差，需采用定心夾緊機構(gòu)。 這種定心夾緊機構(gòu)具有剛性大、動作快、增力倍數(shù)大、工作行程也比較大等特點，但其定心精度較低。除上述介紹的定心夾緊機構(gòu)外，常用的還有膜片卡盤機構(gòu)、波紋套定心夾緊機構(gòu)以及液性塑料夾緊機構(gòu)等。新型的電控永磁夾具，夾緊和松開工件只用2秒，夾具結(jié)構(gòu)簡化，為機床進行多工位、多面和多件加工創(chuàng)造了條件。 四、通用 經(jīng)濟夾具的通用性直接影響其經(jīng)濟性。 the other is the use of thinwalled elastic element force even after the elastic deformation (contraction or expansion), to achieve centering clamping, such as a spring clip drum, diaphragm chuck, bellows units, such as liquid plastic. 1. Centering clamping body spiral Rotary screw thread at both ends to the contrary, the same pitch. When it spins, the two Vshaped gag against the constant movement in order to achieve the centering of the work piece clamping or release. Vshaped work pieces of different shapes can shut up the replacement. Centering clamping bodies such features are: simple structure the work trip and general good but the centering accuracy is not high mainly suitable for rough or semifinished tour of the needs of large and less demanding precision centering occasions. 2. Leveraged institutions centering clamping Threejaw selfcentering leveraged trading cards, sleeve for axial movement the circle are three fabric hook lever will rotate around the axis, the three struck the slider along the radial movement of the cards in order to promote its claws the work piece centering and clamping or release. This centering clamping rigid body, and move fast, by force multiplier, and the work trip is also characterized by relatively large, but its relatively low precision centering. Generally about it is mainly used for rough work. Since the body can not selflocking lever, so that organizations rely on selflocking air pressure or other agencies. 3. Centering clamping wedge bodies Wedge mobile folder automatically centering body claw when the work piece surface within the hole and left the position in the fixture after the sixcylinder through the rod so that the left claw clip due to the role of ontology on the slope while the left claw folder to the opened outside the bulge will be centering the workpiece clamping the other hand claw shifted to right folder in the role of spring circ
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