【文章內(nèi)容簡介】 （手動）K5 手動夾緊時手柄位置系數(shù) （方便）K6 僅有力矩回轉(zhuǎn)時，工件與支撐面接觸情況系數(shù) （接觸點(diǎn)確定）Kc=*= Kp=**= Kf=**= 則有Wkc=*=Wkp=*=Wkf=*=實(shí)際所需夾緊力Wk=查《現(xiàn)代機(jī)床夾具設(shè)計》表423M8螺紋許用夾緊力為2550N 大于實(shí)際所需夾緊力。 夾具體主要零件的選擇與設(shè)計 過渡盤 本工件為一個過渡件，主要起到連接夾具和車床之間的一個圓盤，圓盤的左側(cè)與車床的三角卡盤連接，采用三角卡盤夾緊同時車盤板的右側(cè)與夾具體連接，連接中保證尺寸的公差，同時連接中保證尺寸的同軸度，. 配重塊 配重塊的材料為HT200，配重塊的作用起到配重的作用，因為在整個裝配系統(tǒng)中，按照總圖的方向看，左右關(guān)于中心線對稱，上下則不，考慮到夾具的精確度，盡量使其上下的重量關(guān)于中心對稱，故上部設(shè)計了一個鑄造件的配重塊，使其重量基本相同。 壓板 壓板的作用是壓緊螺栓連接，中間部位與V型塊連接，使其壓住V型塊，進(jìn)而壓緊工件，壓板材料為45，設(shè)計了中間寬兩側(cè)窄的機(jī)構(gòu)。 V型塊V形塊是夾具中常用的元件，主要是適合于夾緊圓形的工件，因為成V型，所以夾緊圓形工件的時候是夾緊的兩條線，也就是對整個工件進(jìn)行兩點(diǎn)壓住，這樣的話具有較強(qiáng)的牢固性，同時可以根據(jù)壓板的壓力方向，適當(dāng)?shù)恼{(diào)整。 定位板 定位板是設(shè)計的重點(diǎn)，同時他的精度的高低直接影響到工件的行為公差，定位板上有3個螺栓孔和2安裝定位銷的孔。本夾具的定位原則為一面兩點(diǎn)定位。采用定位板為基準(zhǔn)面。同時采用一根圓柱銷和一根菱形銷來定位。這樣定位牢固，準(zhǔn)確，符合定位基準(zhǔn)的選擇。 夾具體中銷軸的校核 銷軸在加工過程中主要承受徑向力。選擇銷軸直徑為6，材料45號鋼，查得45號鋼抗拉強(qiáng)度為600MPa,則有剪切強(qiáng)度為（～）*600=360～480 取值360　　故此360**3*3=10173N18086＞， 故滿足要求第4章 結(jié)論近半年的畢業(yè)設(shè)計至此行將結(jié)束，在此次設(shè)計中，我完成了對開合螺母結(jié)構(gòu)、工藝的分析，并且基于這些分析完成設(shè)計了一整套合理的加工工藝過程，在夾具方面，通過力學(xué)方面的計算，查閱圖冊，設(shè)計手冊，以及前人的一些設(shè)計最終完成了一套合理的車床夾具。在這半年的畢業(yè)設(shè)計過程中我收獲良多，尤其對于工藝流程的設(shè)計、讀圖、識圖、制圖的能力有了非常大的提升，這次設(shè)計更將我大學(xué)四年中機(jī)械制造、機(jī)械設(shè)計方面的知識融會貫通，對書本上的知識有了一次更加透徹的理解。在這半年的設(shè)計過程中，我參閱了很多相關(guān)設(shè)計手冊、設(shè)計案例以及各種文獻(xiàn)資料。這些文獻(xiàn)資料都是前人對于這個行業(yè)的理解與實(shí)踐過程，通過對比和參照可以使我的設(shè)計更加便于應(yīng)用，對我的設(shè)計有著舉足輕重的幫助。在查閱和查找的過程中更提升了我對文獻(xiàn)的搜集能力。同時培養(yǎng)了我嚴(yán)謹(jǐn)?shù)脑O(shè)計態(tài)度，設(shè)計中每個結(jié)構(gòu)的設(shè)計、材料、數(shù)據(jù)的選用都必須嚴(yán)格遵守機(jī)械設(shè)計手冊的規(guī)定。此次畢業(yè)設(shè)計給我一次工程師的培訓(xùn)，讓我樹立了正確的設(shè)計思想，初步掌握了工程設(shè)計的手段與方法。相信此次經(jīng)歷會給我今后的生活以及工作帶來巨大的影響。致謝通過這一段時間的學(xué)習(xí)設(shè)計，讓我鞏固了大學(xué)所學(xué)的專業(yè)知識，更鍛煉了自己的設(shè)計能力，更培養(yǎng)了我獨(dú)立思考的能力，使我收獲頗豐。再此要對指導(dǎo)我完成設(shè)計的李紅梅老師致以最高的敬意，她思維嚴(yán)謹(jǐn)，態(tài)度認(rèn)真，在多次的討論和匯報中指出我設(shè)計中的不合理之處，并提出修改意見，使我的設(shè)計逐漸趨于完善。最后要感謝在這次設(shè)計過程中幫助過我的老師、工廠師傅以及同學(xué)們。你們無私的幫助，是我完成畢業(yè)設(shè)計的過程中重要的助力！參考文獻(xiàn)[1] ：機(jī)械工業(yè)出版社，2005[2] ：上?？茖W(xué)技術(shù)出版社，2009[3] ：高等教育出版社，2009[4] ：化學(xué)工業(yè)出版社，2009[5] ：機(jī)械工業(yè)出版社，1991[6] ：高等教育出版社，2011[7] ：高等教育出版社，2009[8] ：機(jī)械工業(yè)出版社，2011[9] ：機(jī)械工業(yè)出版社，2005附錄 外語文獻(xiàn)譯文英文原文CamsVarious motions can be produced by the action of a cam against a timing devices are operated by can purpose of andy cam is to produce a displacement of its follower。a secondary follower is often .used to produce additional displacement in another most popular type is the plate cylindrical type is used to transmit linear motion to a follower as the cam cam are sometimes used。these provide some unusual follower motions,but also make follower design camshaft in the automotive engine illustrates a simple but important application of a late cam assemblies in automatic record players illustrate a somewhat more plex application.Cam profiles are accurately constructed by either praphical or mathematical transition from development drawings to working (shop) drawing can be made in several ways: a fullscale is desirable from the manufacturing standpoint,but it will not guarantee accurate cam profiles. radial is fairly accurate,but sometimes produces layout problems in the shop. coordinate procedure will ensure accuracy.In selecring one of these methods,one should consider the function of the cam in terms of desired preciseness.Because the cam work outline already determined, therefore the cam structural design mainly was determines the curve outline axial thickness and the cam and the drive shaft connection way. When the work load pares the hour, curve outline axial thickness generally takes for the outline curve biggest radius of vector 1,/10 ～/5。 Regarding a stress bigger important situation, must with carry on the design according to the cam contour surface from the contact intensity. When determination cam and drive shaft joint way, should synthesize the consideration cam the assembling and dismantling, the adjustment and firmly grades the question. Regarding implementing agency more equipment, between its each execution ponent movement coordination usually determined by the cycle of motion chart, therefore in assembly cam gear time, the cam contour curve initial station (pushes regulation starts) the relative position to have according to the cycle of motion chart to carry on the adjustment, guarantees each execution ponent to be able according to the preset sequence synchronized action. Therefore, requests the cam in the structural design to be able to be opposite to the drive shaft carries on the rotation along the circumference direction, and reliably performs fixedly. The simplest method uses the clamping screw nail fixed cam, or with clamping screw nail pre fixed, after treats adjusts uses the pin to be fixed again. From structural design: from structure: When design must consider from the guidance and prevented revolves. From movement rule design: Involves many aspects from the movement rule design the questions, besides consideration rigidity impact and flexible impact, but also should maximum speed vmax which has to each kind of movement rule, maximum acceleration amax and its the influence performs the parison. 1) vmax bigger, then momentum mv is bigger. If from is suddenly prevented, the oversized momentum can cause the enormous impulse, endangers the equipment and the personal safety. Therefore, when is bigger from the quality, in order to reduce the momentum, should choose the vmax value smaller movement rule. 2) amax bigger, is bigger. Function in high vice contact place stress bigger, the organization intensity and the wear resistant request is also higher. Regarding high speed cam, in order to reduce the harm, should choose the amax value smaller movement rule. First states several kind of movements rules vmax, amax, the impact characteristic a