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畢業(yè)論文-杠桿的加工工藝及專(zhuān)用卡規(guī)的設(shè)計(jì)(更新版)

  

【正文】 he end of our life, and can meet many things really do? 而窮盡我們的一生,又能遇到多少事情是真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè) 人的時(shí)候,自己的想法總是特別地清晰。 Have declared the end of the encounter that haven39。 Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness that’s unfolding in our lives, it gets stronger and more real. We take an emotion that’s fleeting and make it a solid event, instead of something that passes through us. 當(dāng)生活中出現(xiàn)痛苦的事情時(shí),別再逃跑或隱藏痛苦,試著擁抱它吧;當(dāng)悲傷來(lái)襲時(shí),試著深呼吸,然后直面它。與其一味顧慮重重,不如從局外人的角度看待決策之事。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。屏住呼吸,生活停滯;呼出呼吸,更多新奇與經(jīng)歷又將拉開(kāi)序幕。突然想到那件藍(lán)格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友誼;還有那場(chǎng)還沒(méi)有開(kāi)始就宣告了終結(jié)的邂逅計(jì)劃 …… 那些年那些天的非做不可,終于和青春一樣,都將在我們的人生中謝幕。也曾經(jīng)好像已經(jīng)下定了決心去做某件事,但更多的時(shí)候是最后又打起了退堂鼓。t really grow up, it seems is not so important。s actions. CSKA said they were surprised and disappointed by Toure39。t charge you more than 35% of your pensation if you win the case. you39。 由公式( 51) n=1000v/π d, n=1000*40/( *80) =,參照表 415所列 X51 型立式銑床的主軸轉(zhuǎn)速,取 n=160r/min。 在粗加工階段,首先將精基準(zhǔn)(Φ 28H7孔)準(zhǔn)備好,使后續(xù)工序都可采用精基準(zhǔn)定位加工,保證其他加工表面的精度要求 ;然后粗銑三個(gè)圓孔的外端面、粗銑Φ 10孔上端面在精加工階段,進(jìn)行三個(gè)圓孔的外端面的半精銑、 工序集中與分散 在生產(chǎn)綱領(lǐng)一確定成批生產(chǎn)的情況下,考慮到經(jīng)濟(jì)效益,工藝簡(jiǎn)單,盡量降低成本等因素我們采用工序集中。 2.各個(gè)表面加工方法的選擇 杠桿零件中零件 Φ 28HΦ 10H7 孔 的外端面,它是毛坯鑄造出28 來(lái)之后第一個(gè)加工的端面,此面將作為粗基準(zhǔn),表面粗糙度為 。 28 零件工藝規(guī)程的設(shè)計(jì)綱要及步驟 第一部分 零件的技術(shù)要求及工藝分析 1.杠桿(二)的技術(shù)要求 2.零件的工藝分析 分析零件圖可知,杠桿零件中的Φ 10HΦ 28H7孔的外端面均要求銑削加工 ,并在軸向方向上均高于相 鄰表面,這樣既減少了加工面積,又提高了其接觸剛度;φ 10H7和φ 28H7孔的端面均為平面,可以防止加工過(guò)程中鉆頭偏離,以保證加工精度;另外,該零件除主要工作表面外,其余表面加工精度較低,不需要高精度機(jī)床加工,通過(guò)銑削、鉆床的粗加工就可以達(dá)到加工要求;而主要工作表面雖然加工精度相對(duì)較高,但也可以在正常的生產(chǎn)條件下,采用較經(jīng)濟(jì)的方法保質(zhì)保量的加工出來(lái)。機(jī)械加工工藝是實(shí)現(xiàn)產(chǎn)品設(shè)計(jì),保證產(chǎn)品質(zhì)量、節(jié)約能源、降低成本的重要手段,是企業(yè)進(jìn)行生產(chǎn)準(zhǔn)備,計(jì)劃調(diào)度、加工操作、生產(chǎn)安全、技術(shù)檢測(cè)和健全勞動(dòng)組織的重要依據(jù),也是企業(yè)上品種、上質(zhì)量、上水平,加速產(chǎn)品更新 提高經(jīng)濟(jì)效益的技術(shù)保證。 3) .對(duì)零件進(jìn)行工藝分析(包括零件的作用、技術(shù)要求和加工工藝性)。 6)、關(guān)鍵工序的工裝設(shè)計(jì)、方案選擇與計(jì)算。所以機(jī)械的加工工藝及夾具設(shè)計(jì)對(duì)即將進(jìn)入工廠的機(jī)械類(lèi)畢業(yè)生來(lái)說(shuō)很必要。 零件年產(chǎn)量為中批量, 而且零件加工的輪廓尺寸不大,在考慮提高生產(chǎn)率保證加工精度后可采用鑄造成型中的金屬模鑄造。 Φ 28H7孔加工,它將作為精基準(zhǔn)以完成以后的加工,為達(dá)到題目要求我們采取粗?jǐn)U — 精擴(kuò) — 鉸的工序過(guò)程,最終完成Φ 28H7孔加工。 28 在粗加工之后,為消除切削加工過(guò)程中工件的內(nèi)應(yīng)力而安排的熱處理工序:人工時(shí)效處理 (3)輔助工序安排 在粗加工和熱處理后,安排去毛刺;在精加工后,安排去毛刺、清洗和終檢工序。根據(jù)《設(shè)計(jì)指南》表 5148P199 和表5149P200可知,用硬質(zhì)合金端銑刀粗加工,銑刀刀齒后刀面最大磨損量為 1mm;銑刀直徑為 100mm,耐用度為 T=180min。s 150th anniversary celebrations and will attend City39?;蛟S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(qián)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(xiě)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 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. 28 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
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