【正文】 ably 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 and the suitable situation following table regarding swings from the cam gear, its movement graph xcoordinate expression cam corner, ycoordinate then separately expresses from, angular speed and angle acceleration. This kind of movement graph has the state of motion and above is same.From structural design: from structure: When design must consider from the guidance and prevented revolves. From movement rule design: The cam gear design basic question 1. cam gears type choice, the definite cam shape, with from maintains the high vice contact from the shape and the movement form and the cam the way 2. from the movement rule design, according to the application situation to from the traveling schedule and the state of motion request, determines from the movement rule. 3. cam gears basic parameter design, determines from the traveling schedule, various movements angle, the cam radius, , the roller radius, the center distance, from the length and so on. 4. cam contours curve design. 5. cam gears bearing capacity putation. 6. cam gears structural design, plan organization assembly drawing and various ponents shop drawingFrom structural design: from structure: When design must consider from the guidance and prevented revolves. From movement rule design: The cam gear design basic question 1. cam gears type choice, the definite cam shape, with from maintains the high vice contact from the shape and the movement form and the cam the way 2. from the movement rule design, according to the application situation to fromthe traveling schedule and the movement 1, the cam gear application cam gear is includes the cam the high vice organization, the cam gear has the structure to be simple, may accurately realize request merit and so on movement rule, thus obtains the widespread application in the industrial production, specially automatic device and in the automatic control device, obtains the widespread application. 2nd, the cam gear classification according to two moves the relative motion characteristic classification between the ponent (1) the plane cam gear 1) the disk cam。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。最后要感謝在這次設(shè)計過程中幫助過我的老師、工廠師傅以及同學們。致謝通過這一段時間的學習設(shè)計，讓我鞏固了大學所學的專業(yè)知識，更鍛煉了自己的設(shè)計能力，更培養(yǎng)了我獨立思考的能力，使我收獲頗豐。此次畢業(yè)設(shè)計給我一次工程師的培訓，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。在查閱和查找的過程中更提升了我對文獻的搜集能力。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資料。選擇銷軸直徑為6，材料45號鋼，查得45號鋼抗拉強度為600MPa,則有剪切強度為（～）*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。這樣定位牢固，準確，符合定位基準的選擇。采用定位板為基準面。 定位板 定位板是設(shè)計的重點，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。 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，進而壓緊工件，壓板材料為45，設(shè)計了中間寬兩側(cè)窄的機構(gòu)。 切削力的計算 鏜孔切削力(灰鑄鐵HT150 硬質(zhì)合金刀具)：依據(jù)《現(xiàn)代機床夾具設(shè)計》表418周向分力Fc=902*a*fKp徑向分力Fp=530af*Kp軸向分力Ff=451afKpa ——背吃刀量f ——每轉(zhuǎn)進給量（最大）Kp ——修正系數(shù)= KKKKKK ——（HB/150） HT150硬度取160HB~180HB 取180HB 指數(shù)n取值依據(jù)力的作用方向不同而不同 Fc：n= K = Fp: n= K = Ff: n= K =KKKK ——與刀具有關(guān)選用YW11硬質(zhì)合金鏜刀（灰鑄鐵 切削刀具）查《切削手冊》刀具主偏角 Kr=60度Fc：K= 前角γo=10度 Fc: K= Fp：K= Fp: K= Fe：K= Fe: K=入刃角λs=10度 三方向力 K=1 刀尖圓弧半徑r=2mm K=1 根據(jù)任務(wù)書要求，需要設(shè)計精鏜工序時的車床夾具，精鏜時，由之前工藝部分所選取的參數(shù)取背吃刀量a等于精鏜工序時的加工余量=選擇進給量為f=切削速度為V=車床主軸轉(zhuǎn)速n=60000V/(πd)=60000*（*40）=則有周向分力Fc=902*a*fKp=902*****= 徑向分力Fp=530af*Kp=530*****= 軸向分力Ff=451afKp=451*****=則F== 夾緊力的計算以及校核 根據(jù)《現(xiàn)代機床夾具設(shè)計》表 421 工件以平面定位根據(jù)夾緊力公式Wk=KF/(u+u)K為安全系數(shù)K=K0*K1*K2*K3*K4*K5*K6K1 加工性質(zhì)系數(shù) K2 刀具鈍化系數(shù) Fe方向取1 K3 切削特點 取1（連續(xù)切削）K4 夾緊力穩(wěn)定性 （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) （接觸點確定）Kc=*= Kp=**= Kf=**= 則有Wkc=*=Wkp=*=Wkf=*=實際所需夾緊力Wk=查《現(xiàn)代機床夾具設(shè)計》表423M8螺紋許用夾緊力為2550N 大于實際所需夾緊力。夾具體毛面與工件之間應(yīng)留有足夠的間隙，一般為4~15mm。 夾具體應(yīng)便于制造、裝配和檢驗。為保證夾具體不產(chǎn)生變形和振動，夾具體應(yīng)有足夠的強度和剛度。 為使夾具體尺寸穩(wěn)定，鑄造夾具體要進行時效處理，焊接和鍛造夾具體要進行退火處理。 整體的安裝及尺寸公差的分析首先底板與圓盤焊接，焊接