【正文】 （mm）毛坯的最小尺寸：=（mm）粗車(chē)后最大尺寸：94+=（mm）粗車(chē)后最小尺寸：=（mm）半精車(chē)后最大尺寸：94+=（mm）半精車(chē)后最小尺寸：=（mm）精車(chē)后尺寸為94mm加工余量計(jì)算表 工序 加工尺寸及公差鑄造毛坯粗車(chē)半精車(chē)精車(chē)加工前尺寸最大最小加工后尺寸最大最小加工余量2加工公差法蘭盤(pán)的鑄件毛坯圖見(jiàn)附圖 工序 1 粗車(chē)Φ100端面及外圓柱面，粗車(chē)B面，粗車(chē)Φ90的外圓柱面工件材料：HT200 δb=220MPa 模鑄加工要求：車(chē)削Φ100mm端面及外圓柱面，粗車(chē)B面機(jī)床：CA6140臥式車(chē)床 刀具：采用刀片的材料為YT15，刀桿尺寸16x25mm,=90,=15,=12,=2．計(jì)算切削用量(1) 粗車(chē)Φ100mm端面 1) 已知毛坯長(zhǎng)度方向的加工余量為3+0..8 0。由于各端面及外圓柱面都與Φ20軸線有公差保證，所以加工各端面及外圓柱面時(shí)應(yīng)盡量選用Φ20孔為定位基準(zhǔn)。制定工藝路線的出發(fā)點(diǎn)，應(yīng)當(dāng)是使零件的幾何形狀，尺寸精度及位置精度等技術(shù)要求能得到合理的保證。對(duì)本零件而言，由于每個(gè)表面都要求加工，為保證各表面都有足夠的余量，應(yīng)選加工余量最小的面為粗基準(zhǔn)（這就是粗基準(zhǔn)選擇原則里的余量足夠原則）現(xiàn)選取Φ45外圓柱面和端面作為粗基準(zhǔn)。否則，加工工藝過(guò)程中會(huì)問(wèn)題百出，更有甚著，還會(huì)造成零件大批報(bào)廢，使生產(chǎn)無(wú)法正常進(jìn)行。 零件的工藝分析 法蘭盤(pán)是一回轉(zhuǎn)體零件,有一組加工表面,這一組加工表面以Φ20為中心 ,包括:兩個(gè)Φmm的端面, 尺寸為Φmm的圓柱面,兩個(gè)Φ90mm的端面及上面的4個(gè)Φ9mm的透孔. Φmm的外圓柱面及上面的Φ6mm的銷(xiāo)孔, Φ90mm端面上距離中心線分別為34mm和24mm的兩個(gè)平面. 這組加工表面是以Φ20mm為中心,其余加工面都與它有位置關(guān)系,可以先加工它的一個(gè)端面,再借助專(zhuān)用夾具以這個(gè)端面為定位基準(zhǔn)加工另一端面,然后再加工其它加工表面. 零件圖下：如2 工 藝 規(guī) 程 設(shè) 計(jì) 零件材料為HT200，由于零件年產(chǎn)量為1000件，已達(dá)到中批生產(chǎn)的水平，而且零件輪廓尺寸不大，故采用金屬模鑄造，法蘭盤(pán)因毛坯比較簡(jiǎn)單，采用鑄造毛坯時(shí)一般是成隊(duì)鑄造，再進(jìn)行機(jī)械加工。 因此，它在我們大學(xué)生活中占有重要地位。通過(guò)以上的概述，整個(gè)設(shè)計(jì)基本完成。對(duì)于粗加工，還要校核機(jī)床功率。根據(jù)零件圖提出的加工要求，確定毛坯的制造形式和尺寸的確定。第二步，進(jìn)行基面的選擇，確定加工過(guò)程中的粗基準(zhǔn)和精基準(zhǔn)。最后，設(shè)計(jì)第三道工序—鉆法蘭盤(pán)孔的夾具。關(guān)鍵詞: 機(jī)械；加工工藝；夾具設(shè)計(jì)ABSTRACTA specialized main specialized course that mechanical manufacturing engineering is studied is machinery , rely mainly on studying machining technology and jig to design technological discipline , have very strong practicality , require that should contact production practices closely in the learning process, at the same time it has prehensive the very strong one, The subject of this graduation project is that CA6140 lathe ring flange processing technology rules and specialpurpose jig of a certain process are designed, the main content is as follows: First of all, analyse , it is mainly analysis of the function of the part and craft analysis to the part , through part analyse can find out about basic situation of part, and craft analyse may know the processing surface of the part and is it require to process. The processing demand put forward according to the part picture, confirm the manufacture form of the blank and sureness of the size. The second step, carry on the choice the base , confirm thick datum and precise datum in the processing course. According to the datum chosen , make the craft route , usually make the craft route of more than two kinds, with analysing through the parison of the craft scheme, and then choosing be able to make such specification requirements as the precision of geometry form , size of the part and precision of position ,etc. get a kind of process of the rational assurance s. The third step, according to the already selected process route, confirm for every steps of cutting consumption and basic manhour , choose suitable lathe and cutter. To rough machining , will check the power of the lathe . Finally , design the third process the jig getting into the hole of the ring flange. Put forward the question of designing first , and then choose to orient the datum , then the calculation that begins to cut strength , clamp strength and analysis of the localization error. Then put the design course in order as the drawing. Through the summary of the above, design and finish basically entirely. Keywords: machine。就我個(gè)人而言，我也希望通過(guò)這次設(shè)計(jì)對(duì)自己未來(lái)將從事的工作進(jìn)行一次適應(yīng)性心理，從中鍛煉自己分析問(wèn)題，解決問(wèn)題的能力，對(duì)未來(lái)的工作發(fā)展打下一個(gè)良好的基礎(chǔ)。這從提高生產(chǎn)率，保證加工精度上考慮也是應(yīng)該的。1） 粗基準(zhǔn)的選擇 選擇粗基準(zhǔn)主要是選擇第一道機(jī)械加工工序的定位基準(zhǔn)，以便為后續(xù)的工序提供精基準(zhǔn)。在車(chē)床上用帶有子口的三爪卡盤(pán)夾住工件，消除工件的六個(gè)自由度，達(dá)到完全定位。在生產(chǎn)綱領(lǐng)一確定為中批生產(chǎn)的條件下，可以考慮采用萬(wàn)能性的機(jī)床配以專(zhuān)用工夾具，并盡量使工序集中來(lái)提高生產(chǎn)率。經(jīng)過(guò)比較修改后的具體工藝過(guò)程如下:工序 1 粗車(chē)Φ100端面及外圓柱面,粗車(chē)B面，粗車(chē)Φ90的外圓柱面工序 2 粗車(chē)Φ45端面及外圓柱面，粗車(chē)Φ90的端面工序 3 鉆、擴(kuò)、粗鉸Φ20的孔工序 4 鉆Φ4孔，再鉆Φ6孔工序 5 半精車(chē)Φ100的端面及外圓柱面，半精車(chē)B面，半精車(chē)Φ90的外圓柱面，車(chē)Φ100、Φ90的倒角，車(chē)Φ45兩端過(guò)渡圓弧，車(chē)Φ20孔的左端倒角工序 6 半精車(chē)Φ45的端面及外圓柱面，半精車(chē)Φ90的端面，車(chē)3*2退刀槽，車(chē)Φ45的倒角，車(chē)Φ20內(nèi)孔的右端倒角工序 7 精車(chē)Φ100的端面及外圓，精車(chē)B面工序 8 精車(chē)Φ45的外圓，精車(chē)Φ90的端面工序 9 精絞Φ20的孔工序 10 磨Φ100、Φ45的外圓柱面工序 11 鉆4—Φ9透孔工序 12 銑Φ90mm圓柱面上的兩個(gè)平面工序 13 磨B面工序 14 磨Φ90mm外圓柱面上距離軸線24mm的平面工序 15 劃線刻字工序 16 Φ100mm外圓無(wú)光鍍鉻工序 17 檢查 ,就會(huì)發(fā)現(xiàn)仍有問(wèn)題,主要表現(xiàn)在工序Ⅳ鉆Φ4mm孔，再鉆Φ6mm孔由于在設(shè)計(jì)夾用夾具時(shí)要以Φ90mm圓柱面上的一個(gè)平面來(lái)定位,所以應(yīng)把銑Φ90mm圓柱面上的兩個(gè)平面這一道工序放在鉆Φ4孔，再鉆Φ6mm孔工序前. 并且工序 Ⅲ與工序 Ⅴ序可并為一個(gè)工序,否則就有點(diǎn)繁瑣.因