【正文】
vxumqvc zafTdCV 0? 其中 T=180 m= yv = Cv =148 uv = qv = xv = pv = 計(jì)算得 Vc =311m/min V=311m/min 4)主軸轉(zhuǎn)速 m i n/495200 31110001000 rd Vn cc ?? ??? ??? 按機(jī)床說(shuō)明書(shū)選取 n? =560r/min n? =560r/min 故實(shí)際切削速度 m in/352495560 mVVC ??? V=352m/min 12 5)銑削時(shí)間 fn lllt ? 211 ??? ? ? ? ? mml 883~ ???? mml mz 1 6 8 035 6 0 ??? m i ??t t= 工序 5:銑 Φ13H8下端面 加工條件 加工要求:表面質(zhì)量 ,保證尺寸 41177。 尺寸 10+ 機(jī)床: C620 普通車(chē)床 刀具:刀片材料 W18Cr4V 刀桿尺 寸 16X25mm2 計(jì)算切削用量 ( 1) 粗銑結(jié)合面 1) 毛坯壁厚加工余量 1+ αp= αp= 2)鋁合金鑄件粗車(chē)進(jìn)給量 ~????第 2 章 工藝規(guī)程設(shè)計(jì) 9 取 f=(按機(jī)床說(shuō)明書(shū)取 ) f=3)計(jì)算切削速度 (《切削用量手冊(cè)》 P42 表 21) vyvmvc kfapTvCCV ? 其中 T=60min= yv= Cv=328 Kv= 得 VC=97m/min VC=97m/min 4)計(jì)算機(jī)床主軸轉(zhuǎn)速 min/54160 9710001000 rd V c ?? ??? ?? ? 按機(jī)床說(shuō)明書(shū)取 nω=480 min/r nω =480 min/r 則實(shí)際切削速度 V=Vcx480/514=90m/min v=90m/min 5)計(jì)算切削工時(shí) T1=(l+y)/(nωf)=(60+1)/()= t= (2)精車(chē)結(jié)合面 1) p= p= 2) 選進(jìn)給量 f=3)切削速度 kfapTzvvyxvm vc dCV 0? =( ) =4)機(jī)床主軸轉(zhuǎn)速 nc1000vc/=按機(jī)床說(shuō)明書(shū)取 nω =955r/min 切削工時(shí) t2=(l+y)/ nω /f= t2= T=t1+t2=+= 工序 2 :鉆、鉸銷(xiāo)孔 Φ8F9 加工條件: 加工要求:兩孔為以后各道工序的定位孔,精度要求 較高,其中心距要求 190 177。 機(jī)械加工余量、工序尺寸及毛坯尺寸的確定 4T17 變速器左側(cè)蓋零件材料為 ZL104,硬度為 50~70HB,毛坯重量為 ,生產(chǎn)類(lèi) 型為大成批生產(chǎn),采用壓力鑄造毛坯。在生產(chǎn)綱領(lǐng)已確定為大批量生產(chǎn)的前提下,可以考慮采用萬(wàn)能性第 2 章 工藝規(guī)程設(shè)計(jì) 5 機(jī)床配以專(zhuān)用夾具,并盡量使工序集中來(lái)提高生產(chǎn)率。 ( 3)必須考慮定位準(zhǔn)確、夾緊可靠以及夾具結(jié)構(gòu)簡(jiǎn)單操作方便。 基面的選擇 基面選擇是工藝規(guī)程設(shè)計(jì)中的重要工作之一,基面選擇的正確與合理使用使加工 得到保證,生產(chǎn)效率得以提高。離心澆注要求最小壁厚 3~5mm,且壁厚均勻,適合于回轉(zhuǎn)體,所以離心鑄造澆注不滿(mǎn)足要求,而壓鑄件最大壁厚 10mm,形狀復(fù)雜程度取決于磨具,生產(chǎn)類(lèi)型為大批量生產(chǎn),較其它方法要 合適。 零件的工藝分析 該零件結(jié)構(gòu)形狀較為復(fù)雜,加工表面較多,具有一定的位置要求,現(xiàn)分述如下: 結(jié)合面積定位銷(xiāo)孔 它們是以后各道工序的定位 精準(zhǔn)(以后各道加工工序均以此一面兩孔定位), 2 , 表面粗糙度 ,兩銷(xiāo)孔故精度要求較高。 通過(guò)對(duì)變速箱左側(cè)蓋制造活動(dòng)有一個(gè)總體的全貌的了解與把握,能 夠掌握機(jī)械加工的基本知識(shí),能選擇加工方法與機(jī)床,刀具,卡具及加工參數(shù),具備制定工藝規(guī)程的能力及掌握機(jī)械加工精度和表面質(zhì)量的基礎(chǔ)初步具備分析及解決現(xiàn)場(chǎng)工藝問(wèn)題的能力 關(guān)鍵詞 變速器左側(cè)蓋;加工工藝;定位;夾具設(shè)計(jì) Abstract II Abstract Automobile speed aviator left cover is an important ponent of the gearbox. Box it and gearbox assembly, the internal gear for the transmission, axle ponents,and other word. It provides a stable and secure working environment to prevent exposure of internal ponents in the working environment. This Paper requires that with quality beg development, with benefits seek to live on to store , under the prerequisite of guaranteeing the quality of element processing , have raised productivity and reduced production cost, is one of mainly direction of domestic and international modern machining technology developing. Make the starting point of the process route, is to make the parts shall be geometric shape, size precision technology requirements get reasonable guarantee. In the production program has determined to be under the premise of mass production, can consider to use sex machine tool39。 畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 設(shè)計(jì)(論文)題目: 變速器結(jié)合蓋機(jī)械加工工藝規(guī)程及指定工序?qū)S脢A具設(shè)計(jì)(大批量) 學(xué)生姓名: 學(xué) 號(hào) : 專(zhuān)業(yè)班級(jí) : 09 級(jí) 機(jī)械 3 班 學(xué) 部: 指導(dǎo)教師: 教授 2020 年 06 月 1 日 摘 要 I 摘 要 汽車(chē)變速器左側(cè)蓋是汽車(chē)變速箱的重要組成部分。s match with special jig, and try to make process to improve on productivity. In addition, also should consider economic benefit, so as to reduce the production cost as much as possible, in short, in making the process route when, should follow: high quality, high yield, low consumption principle, that make the process route in the current conditions the most reasonable Through knowing and analysis the the left side transmission cover part drawing for transmission, so as to analysis the process, make process explanation and analysis the technical requirement and the precision of the left side transmission cover. Then, carry out the design of clamping apparatus and analysis the precision and error for the processing of the contact plane of left side transmission cover, this technology and the design result of clamping apparatus can apply in production requirement. Through the gearbox manufacturing activity on the left side of the cover have a overall understanding and grasp the full picture, able to master the basic knowledge of the mechanical processing, can choose processing methods and machine tool, cutting tool, fixture and machining parameters, have the ability to process regulations formulated and mastered the basic mechanical machining accuracy and surface quality of the basic capability of analysis and solving process problems. Keywords The left side transmission cover , processing technology , Fixed position , Tongs design 目 錄 III 目 錄 摘 要 ??????????????????????????????? I Abstract ?????????????????????????????? II 第 1章 零件的分析 ????????????????????????? 1 零件的作用 ?????????????????????????? 1 具有保護(hù)作用 ??????????????????????? 1 具有支撐作用 ??????????????????????? 1 可以簡(jiǎn)化箱體設(shè)計(jì)制造,提高工藝性能 ????????????? 1 零件的工藝分析 ???????????????????????? 1 結(jié)合面積定位銷(xiāo)孔 ????????????????????? 1 孔 3Φ13F9 的加工要求 ??????????????????? 2 導(dǎo)軸孔 Φ16E8 與 Φ13H8 要求 ????????????????? 2 第 2章 工藝 規(guī)程 設(shè)計(jì) ???????????????????????? 3 確定毛坯的制造形式 ?????????????????????? 3 零件的力學(xué)性能要求 ???????????????????? 3 零件的結(jié)構(gòu)形狀和外廓尺寸 ????????????????? 3 生產(chǎn)綱領(lǐng)和批量 ?????????????????????? 3 基面的選擇 ?????????????????????????? 4 粗基準(zhǔn)的選擇 ??????????????????????? 4 精基準(zhǔn)的選擇 ??????????????????????? 4 制造加工工藝路線(xiàn) ??????????????????????? 4 工藝路線(xiàn)方案一 ?????????????????????? 5 工藝路線(xiàn)方案二 ?????????????????????? 5 工藝路線(xiàn)的分析與比較 ??????????????????? 6 機(jī)械加工余量、工序尺寸及毛坯尺寸的確定 ???????????? 6 車(chē)結(jié)合面 ???????????????