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程及自動(dòng)編程技術(shù)等內(nèi)容。 第 五 周:編寫設(shè)計(jì)說(shuō)明書。 ,各按鈕是否能自動(dòng)復(fù)位。 第二周:查閱文獻(xiàn)、收集資料。其中數(shù)控機(jī)床我們現(xiàn)在用的是西門子系統(tǒng)的,包括編程語(yǔ)言到是西門子系統(tǒng)的。 ( 3)兼顧加工精度和加工效率,在保證加工精度的前提下,認(rèn)真進(jìn)行公工藝分析,制定出合理的工藝方案,選擇合理的切削用量。 ( 2)畢業(yè)設(shè)計(jì)過(guò)程中要勤思考、勤問(wèn)、勤做、勤總結(jié),不斷積累編程經(jīng)驗(yàn)技巧,提高對(duì)數(shù)控加工工藝分析和 編程能力。同時(shí),社會(huì)經(jīng)濟(jì) 的飛速發(fā)展,對(duì)數(shù)控裝置和數(shù)控機(jī)械要求在理論和應(yīng)用方面有迅速的發(fā)展和提高。在機(jī)床上加工零件時(shí),首先要分析零件圖樣的要求、確定合理的加工路線及工藝參數(shù)、計(jì)算刀具中 心運(yùn)動(dòng)軌跡及其位置數(shù)據(jù);然后把全部工藝過(guò)程以及其他輔助功能(主軸的正轉(zhuǎn)與反轉(zhuǎn)、切削液的開與關(guān)、變速、換刀等)按運(yùn)動(dòng)順序,用規(guī)定的指令代碼及程序格式編制成數(shù)控加工程序,經(jīng)過(guò)調(diào)試后記錄在控制介質(zhì)上;最后輸入到書空機(jī)床的數(shù)控裝置中,以此控制數(shù)控機(jī)床完成工件的全部加工過(guò)程。編寫人員只需根據(jù)6 圖樣的要求,使用數(shù)控語(yǔ)言編寫出零件加工的源程序送入計(jì)算機(jī),由計(jì)算機(jī)自動(dòng)地進(jìn)行數(shù)值計(jì)算、后置處理,編寫出零件加工程序單, 并 在屏幕顯示 模擬加工過(guò)程并 及時(shí)修改,直至自動(dòng) 輸 出數(shù)據(jù)加工紙帶,或?qū)⒓庸こ绦蛲ㄟ^(guò)直接通信的方式送入數(shù)控機(jī)床,指揮機(jī)床工作。13mm—— 擴(kuò)孔 162。按照基面先行、先面后孔、先主后次、先粗后精的原則確定加工順序,即粗加工定位基準(zhǔn)面(底面) —— 粗、精加工上表面 —— 162。 表 21設(shè)計(jì)中刀具的選擇 表 : 序號(hào) 刀具編號(hào) 刀具規(guī)格名稱 數(shù)量 加工表面 刀尖半徑 /mm 備注 1 T01 162。13 鉆頭 1 鉆 2*162。60mm外圓及其臺(tái)階面和外輪廓面時(shí),留 ,其次一刀完成粗銑。38鉆頭 200 40 19 02 162。125 180 25 手動(dòng) 04 粗銑 162。40H7 內(nèi)孔表面 T04 25*25 500 30 手動(dòng) 09 粗銑外輪廓 T07 162。40 圓的圓心處為工件編程 X、 Y軸原點(diǎn)坐標(biāo), Z軸原點(diǎn)坐標(biāo)在工件上表面。62的圓(注意刀具補(bǔ)償)每刀進(jìn) 4 mm,再依次將圓擴(kuò)大重復(fù)進(jìn)行,直到把毛坯上多余的部分都銑掉,再進(jìn) 4 mm,直到銑到 162。40H7內(nèi)孔表面,使用鏜刀,刀桿尺寸為 25 25mm,主軸轉(zhuǎn)速為600r/min、 使用 LCYC85 循環(huán), 其主要參數(shù): R101=5 R102=3 R103= 0 R104=40 R105=1 R107=60 R108=100 ( 9)精鏜 162。125 硬 質(zhì)合金端面銑刀 LI001 N10 G94 G90 G54 G17 G71 N20 S1000 M03 N30 GOO XO YO N40 Z5 R101=5 R102=3 R103=0 R104=5 R116=0 R117=0 R118=170 R119=110 R121=4 R122=100 R123=50 R124=1 R125=1 R126=2 R127=1 N50 LCYC75 13 N60 G00 Z40 N70 M30 用 162。用機(jī)床控制面板上“回參考點(diǎn)鍵”啟動(dòng)回參考點(diǎn)。 退出仿真系統(tǒng),先按復(fù)位鍵,剛開始時(shí)可進(jìn)行單步加工,按下步加工鍵。工藝設(shè)計(jì)、數(shù)值計(jì)算及程序編制的整個(gè)過(guò)程雖然任務(wù)比較繁重,但在設(shè)計(jì)過(guò)程中通過(guò)自己不斷的學(xué)習(xí),尤其是自主學(xué)習(xí),和實(shí)踐以及實(shí)驗(yàn),我克服了許多的難題,這種成就感使感到十分的喜悅和興奮。值此成文之際,謹(jǐn)向?qū)煴磉_(dá)我深深的敬意和衷心的感謝 ! 在 三 年的學(xué)習(xí)和生活期間,始終得到 濟(jì)源職業(yè)技術(shù) 學(xué)院各位老師的無(wú)私幫助 ,在此深表感謝 ! 在做畢業(yè)設(shè)計(jì)的過(guò)程中,得到了機(jī)房工作人員的大力支持。s 150th anniversary celebrations and will attend City39。或許是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個(gè)不同的日子過(guò)成了同一天的樣子;或許是追溯過(guò)去,對(duì)自己那些近乎偏執(zhí)的怪異信念的醒悟,這些天以來(lái),思緒一直很 凌亂,在腦海中不斷糾纏。t remember his appearance. 童年時(shí),覺(jué)得壓歲錢和新衣服是過(guò)年必備,但是隨著年齡的推進(jìn),會(huì)越來(lái)越發(fā)現(xiàn),那些東西根本就可有可無(wú);初中時(shí),以為要有一場(chǎng)暗戀才意味著真正的成長(zhǎng),但三年過(guò)去后,自己心平氣和的寫同學(xué)錄的時(shí)候,突然就發(fā)現(xiàn)是不是真正的成長(zhǎng)了, 好像并沒(méi)有那么重要了;然后到了高中,覺(jué)得非要吐露出自己的心聲才能為高中生涯里的懵懂情愫劃上一個(gè)句點(diǎn),但畢業(yè)晚會(huì)的時(shí)候最終還是被梗塞在了咽喉,后來(lái)再次站在他曾經(jīng)揮汗如雨的球場(chǎng),看著他投過(guò)籃球的球框時(shí),突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。 At the moment, the sky is dark, the air is fresh factor after just rained. Suddenly thought of blue plaid shirt。我們假裝一切 仿佛都不曾發(fā)生,以此試圖忘卻傷痛,可就算隱藏得再好,最終也還是騙不了自己。 The initial impulse is to run away — to try and suppress these feelings by not acknowledging them. When we do this, we close ourselves off to the parts of our lives 26 that we need to experience most. The next time you have this feeling of being truly unfortable, do yourself a favor and lean into the feeling. Act in spite of the fear. 我們的第一反應(yīng)總是逃避 —— 以為否認(rèn)不安情緒的存在就能萬(wàn)事大吉,可這也恰好妨礙了我們經(jīng)歷最需要的生活體驗(yàn)。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters). In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds. Even if everything goes as planned, it won39。 2. Embrace the unfortable We all know what that twinge of anxiety feels like. We know how fear feels in our bodies: the tension in our necks, the tightness in our stomachs, etc. We can practice leaning into these feelings of disfort and let them show us where we need to ,也都感受過(guò)恐懼造成的生理反應(yīng):脖子僵硬、胃酸翻騰。 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. We often close ourselves off when traumatic events happen in our lives。嫌惡過(guò)自己的怯懦,最終卻發(fā)現(xiàn)有很多 緣分 ,有很多錯(cuò)過(guò),好像冥冥之中真的已經(jīng)注定。 Then in high school, think don39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Cay man Islandsbased Webb, the Watch m head of Fifa39。 20 致 謝 本文從選題、方案論證到課題的研究都是在 苑成友老 師的全面、悉心指導(dǎo)下完成的。經(jīng)過(guò)設(shè)計(jì)中選擇 刀具,我對(duì)數(shù)控工具系統(tǒng)的特點(diǎn)和數(shù)控機(jī)床的刀具材料和使用范圍有了較深刻的了解,基本掌握數(shù)控機(jī)床刀具的選用方法;經(jīng)過(guò)設(shè)計(jì)加工工藝方案,進(jìn)一步了解工件定位的基本原理、定位方式與定位元件及數(shù)控機(jī)床用夾具的種類與特點(diǎn),對(duì)教材中有關(guān)定位基準(zhǔn)的選擇原則與數(shù)控加工夾具的選擇方法有了更深的理解;經(jīng)過(guò)編制零件的加工程序,基本熟悉數(shù)控編程的主要內(nèi)容及步驟、編程的種類、程序的結(jié)構(gòu)與格式,對(duì)數(shù)控編程前數(shù)學(xué)處理的內(nèi)容、基點(diǎn)坐標(biāo)、輔助程序段的數(shù)值計(jì)算有了進(jìn)一步的認(rèn)識(shí)。 把自己編的程序輸入機(jī)床定一個(gè)名字,對(duì)程序進(jìn)行檢查確保程序本身沒(méi)有錯(cuò)誤以及也沒(méi)有輸入錯(cuò)誤。25硬質(zhì)合金立銑刀,換圖 5裝夾方式,對(duì)刀 N10 G94 G90 G54 G17 G71 N20 S1000 M03 N30 GOO X0 Y0 N420 G00 G42 N430 G01 Z10 N440 G03 CR=20 N450 G01 N460 G03 CR=30 N470 G01 N480 G03 CR=20 16 N490 G01 CR=30 N500 G03 CR=30 N510 G01