freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

本科畢業(yè)設(shè)計(jì)-設(shè)計(jì)“刀架”零件的機(jī)械加工工藝規(guī)程生產(chǎn)綱領(lǐng):4000件(完整版)

  

【正文】 1張機(jī)械加工工藝過(guò)程卡片 1份機(jī)械加工工序卡片 1套課程設(shè)計(jì)說(shuō)明書 1份四、進(jìn)度安排第一階段:繪制零件圖,工藝卡片(2天)第二階段:查閱資料,工藝方案比較,確定加工路線(2天)第三階段:確定各工序的加工余量和工序尺寸,計(jì)算各工序的切削用量和工時(shí)定額(3天)第四階段:整理說(shuō)明書,填寫工藝卡片(3天)五、成績(jī)?cè)u(píng)定指導(dǎo)教師 簽名 日期 年 月 日系主任 審核 日期 年 月 日 請(qǐng)您刪除一下內(nèi)容,O(∩_∩)O謝謝!??!Many people have the same mixed feelings when planning a trip during Golden Week. With heaps of time, the sevenday Chinese請(qǐng)您刪除一下內(nèi)容,O(∩_∩)O謝謝?。?!National Day holiday could be the best occasion to enjoy a destination. However, it can also be the easiest way to ruin how you feel about a place and you may bee more fatigued after the holiday, due to battling the large crowds. During peak season, a dream about a place can turn to nightmare without careful planning, especially if you travel with children and older people. As most Chinese people will take the holiday to visit domestic tourist destinations, crowds and busy traffic are inevitable at most places. Also to be expected are increasing transport and acmodation prices, with the possibility that there will be no rooms available. It is also mon that you39。但是在設(shè)計(jì)過(guò)程中所學(xué)到的東西是這次畢業(yè)設(shè)計(jì)的最大收獲和財(cái)富,使我終身受益。見(jiàn)《切削手冊(cè)》第三章中磨料選擇各表,結(jié)果為 平型砂輪,其尺寸為2502575(DdH)。由Z525鉆床說(shuō)明書由就近原則取n=680r/min。32H7 (1)鉆孔φ15: F=~()由于 ,故應(yīng)選孔深修正系數(shù),KT=則: f=(~)~按Z525立式鉆床機(jī)床說(shuō)明書選取 f= V=13m/min(、) 按機(jī)床選取: n=272r/min所以實(shí)際切削速度:切量以及超切量y+△=8mm ;L=l+y+△故切削工時(shí)為 (2)擴(kuò)孔φ30 根據(jù)有關(guān)資料介紹,利用鉆頭進(jìn)行擴(kuò)鉆時(shí),其進(jìn)給量和切削速度與同樣的尺寸的實(shí)心孔時(shí)的進(jìn)給量和切削速度的關(guān)系為: f=(~)f鉆 v=(1/2~1/3)v鉆式中:f鉆、v鉆加工實(shí)心孔時(shí)的切削用量。=100mm,故刀具的壽命T=180min() 5)決定切削速度vc和每分鐘進(jìn)給量vf,當(dāng)d。 故: (2) 精銑底面 1)根據(jù)《切削用量簡(jiǎn)明手冊(cè)》(一下數(shù)據(jù)均來(lái)自此手冊(cè))。由于采用標(biāo)準(zhǔn)硬質(zhì)合金端銑刀,故齒數(shù)Z=5()。=5186。 內(nèi)孔216。工序2:以底面作定位基準(zhǔn),銑側(cè)面。(二)基面的選擇基面的選擇是工藝規(guī)程計(jì)劃中的重要工作之一,基面選擇得正確合理,可以保證加工質(zhì)量,提高生產(chǎn)效率,否則,就會(huì)使加工工藝過(guò)程問(wèn)題百出。車削加工中心還可安裝軸向銑刀、徑向銑刀。這次綜合性的訓(xùn)練,我在以下幾方面得到鍛煉:(1)提高結(jié)構(gòu)設(shè)計(jì)能力。32H7 5(五) 確定切削用量及基本工時(shí) 6工序一:銑削底面 6工序二:銑兩側(cè)面 8工序三:銑削上平面,用圓柱銑刀加工4216。掌握與本設(shè)計(jì)有關(guān)的各種資料的名稱,出處,能夠做到熟練的運(yùn)用。 以底面為中心的加工表面 這一組加工表面包括:銑削底面,與臺(tái)階面保留20mm的高度。精基準(zhǔn)的選擇 精基準(zhǔn)的選擇主要應(yīng)該考慮基準(zhǔn)重合的問(wèn)題,當(dāng)設(shè)計(jì)基準(zhǔn)與工序基準(zhǔn)不重合時(shí),應(yīng)進(jìn)行尺寸換算。11工序4:以底面作定位基準(zhǔn),鉆、擴(kuò)、鉸孔216。32H7由于本設(shè)計(jì)規(guī)定的零件為大批生產(chǎn),應(yīng)該采用調(diào)整法加工,因此在計(jì)算最大、最小加工余量時(shí),應(yīng)按調(diào)整法加工方式予以確定,現(xiàn)制定表格如下:加工余量計(jì)算表加工尺寸工序鑄件毛坯 (Ф32兩端面,刀架底面)粗銑兩側(cè)面精銑兩端面粗銑底面精銑底面加工前尺寸最大64最小64加工后尺寸最大6560最小6560加工余量(單邊)2最大最?。?) 確定切削用量及基本工時(shí) 工序一:銑削底面 加工條件工件材料:HT200正火,σb=670Mpa,鑄造。rg== 計(jì)算切削用量 (1)粗銑底面 1)根據(jù)《切削用量簡(jiǎn)明手冊(cè)》(以下數(shù)據(jù)均來(lái)自此手冊(cè))。=100mm,故刀具的壽命T=180min() 5)決定切削速度vc和每分鐘進(jìn)給量vf,當(dāng)d。但已知銑削寬度為64mm,故應(yīng)根據(jù)銑削寬度≤90mm,選擇d。=100mm,z=5,vf=150mm/min,近似為: Pcc=根據(jù)XA5032型立銑說(shuō)明書(),機(jī)床主軸允許的功率為: Pcm==≥ (可采用)即:ap=,vf=150mm/min,n=600r/min,vc=,fz=。由《切削用量簡(jiǎn)明手冊(cè)》=。計(jì)算鉆削加工工時(shí):由《切削用量簡(jiǎn)明手冊(cè)》+△的值為6mm。其中,工序機(jī)床的進(jìn)給量,主軸轉(zhuǎn)速和切削速度需要計(jì)算并查手冊(cè)確定。二、主要內(nèi)容,了解零件的結(jié)構(gòu)特點(diǎn)和技術(shù)要求,對(duì)零件進(jìn)行結(jié)構(gòu)分析和工藝分析。wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of gorgeous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the Winter woods shining white
點(diǎn)擊復(fù)制文檔內(nèi)容
法律信息相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1