【正文】 和表面粗糙度要求及粗車后留下的加工余量決定的，一般情況是一次去除余量。 采用找正的方法：找正裝夾時必須將工件的加工表面回轉(zhuǎn)軸線（同時也是工件坐標系 Z 軸）找正到與車床主軸回轉(zhuǎn)中心重合。也可以改變夾緊力的作用點，采用軸向夾緊的方式。 確定零件的定位基準和裝夾方式： 定位基準：確定坯件軸線和左端大端面（設(shè)計基準）為定位基準。參考表 1 并根據(jù)實踐經(jīng)驗確定其切削速度為90m/min；粗車時確定主軸轉(zhuǎn)速為 500r/min，精車時確定主軸轉(zhuǎn)速為 800 r/min。 （ 3） 進給速度：粗車時，按式時，按式υ f=nf 可選擇υ f1=200mm /min；精車時，兼顧到圓弧插補運行，故選擇其υ f2=60mm /min 左右；短距離空行程的υ f3=300mm /min。 （三）制定加工方案 用 1 號刀粗車外形，留 （直徑量）的半精車余量。外圓車刀，副偏角以為 60176。 30′，刀尖圓弧半徑取為 。外螺紋車刀安裝在絕對刀號自動轉(zhuǎn)位刀架的2 號刀位上，并定為 2 號刀。 八、結(jié)論 通過這次 畢業(yè)設(shè)計，使我對大學三年所學的知識有了一次全面的綜合運用，例如：數(shù)控編程、工藝分析，這些對今后畢業(yè) 工作 發(fā)展 都有很大的幫助。在以往的傳統(tǒng)的學習模式下，我們可能會記住很多的書本知識，但是通過畢業(yè)論文，我們學會了如何將學到的知識轉(zhuǎn)化為自己的東西，學會了怎么更好的處理知識和實踐相結(jié)合的問題。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. ation about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。s antiracism taskforce, is in London for the Football Association39。s 21 win. Michel Platini, president of European football39。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。 The 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。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。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. 一個人的時候，自己的想法總是特別地清晰。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強心劑，或者說，是自以為是的精神寄托罷了。 Have declared the end of the encounter that haven39。 instead of letting the world soften us, we let it drive us deeper into ourselves. We try to deflect the hurt and pain by pretending it doesn’t exist, but although we can try this all we want, in the end, we can’t hide from ourselves. We need to learn to open our hearts to the potentials of life and let the world soften us. 生活發(fā)生不幸時，我們常常會關(guān)上心門；世界不僅沒能慰藉我們，反倒使我們更加消沉。 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. 當生活中出現(xiàn)痛苦的事情時，別再逃跑或隱藏痛苦，試著擁抱它吧；當悲傷來襲時，試著深呼吸，然后直面它。其實，我們有能力面對 這些痛苦的感受，從中領(lǐng)悟到出路。與其一味顧慮重重，不如從局外人 的角度看待決策之事。t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there