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畢業(yè)論文-液壓式槽型彎板機的結(jié)構(gòu)設計(文件)

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【正文】 cal man, who told him a story about his friendship with a solider from Shenyang, capital of Northeast China39。s to e and recapping the key points. This device, not used in the original, is culturally understandable but artistically mediocre. What puzzles me is the two new songs for the opening and end credits. They were written in English, but sung by Chinese with an unfortable accent. They were obviously designed to appeal to an Englishspeaking base, but do not jibe with the Chinese dialogue. Speaking of the dialogue, the English translation, picked apart by some Chinese, is too literal for my taste. I can imagine a typical American hit by a flurry of royal ranks, addresses and greetings, even multiple names and titles for the same person. The first half hour must be a swamp to wade through, very much like my experience of getting through a Tolstoy tome with its endless inflections of names transliterated into lengthy Chinese. I see the choice of verbatim translation as an effort for conveying exotica. It is fairly petent, with no error that I could detect, but fails to rise above words or capture the essence of the language. A cultural product usually crosses over to a foreign territory first by an emphasis on the monalities. But whether inside or outside China, the temptation to sell it for the differences is just too great. Sure, the sumptuous sets and costumes are a big attraction, but the narrative technique has bee- how shall I put it?- a bit anglicized, which is necessary for cultural export. Judging by the responses, this legend, which, contrary to the claim of the English trailer, is totally fictitious, has departed from China but not yet landed on American shores. I am a big fan of Ralph Waldo Emerson39。 he wondered how in the world he came to belong there. Indeed his penning and publishing this essay caused his exmunication from high society and also caused him a lot of legal trouble. The legal trouble came as a result of the fact that he was speaking out against the government. I like to reference such texts from time to time as an example both of the fact that history does repeat itself and that this world is not so big that what applies to one society does not in any way touch 。ve not yet read it, I strongly encourage you to do so. In this essay, the venerable Emerson talks about eschewing the trappings of society and finding one39。s cultural foray overseas, has been widely panned by its home audience. Retitled Empresses in the Palace, the American version has been shortened from its original 76 episodes at 45 minutes each, to six 90minute episodes. The quick pacing threw off many native viewers, who are accustomed to a more leisurely daytimesoapstyle narrative rhythm. (Chinese TV stations would run two or three episodes every day.) I did not finish the fulllength version and found the truncated one not difficult to follow. What39。s villages and entertain nomadic families, but their fame has spread around the world. On May 16 and 17, nearly 100 singers and dancers from the troupe performed at Beijing39。t help but sing the folk songs, Nasun says. The vastness of Inner Mongolia and the lack of entertainment options for people living there, made their lives lonely. The nomadic people were very excited about our visits, Nasun recalls. We didn39。 最后 , 在本文即將完成之際, 謹祝所有給過我關心、幫助和支持的老師 和同學生活 工作順利! 淮陰工學院畢業(yè)設計說明書 (論文) 第 29 頁 共 28頁 參 考 文 獻 1 姜繼海,宋錦春,高常識 .液壓與氣壓傳動 .北京:高等教育出版社, 2022 2 曾曙林,周梓榮 . 水壓傳動技術的研究進展及在工程機械行業(yè) 的應用 .湖南工程學院學報, 2022(12). 3 程俊蘭,吳蹺明 . 21 世紀的液壓技術發(fā)展展望 .通用機械, 2022 (3) 4 胡大邦 . 國內(nèi)外液壓技術現(xiàn)狀及在煤礦液壓技術的研究方向 .煤礦機電,2022(1). 5 楊爾莊 . 液壓技術的發(fā)展動向及展望 .液壓氣動與密封, 2022(8). 6 成大先 . 機械設計手冊(第 5 卷) .北京:化學工業(yè)出版社, 2022 7 左健民 . 液壓與氣壓傳動 .北京:機械工業(yè)出版社, 1999 8 章宏甲 . 液壓與氣壓傳動 .北京:機械工業(yè)出版社, 1997 9 王明梯 . 機 械科學與技術 .北京:機械工業(yè)出版社, 2022 10 成大先 . 機械設計手冊 — 氣壓傳動 .北京:化學工業(yè)出版社, 2022 11 韓其望 . 液壓測井絞車的應用 .勝利油田, 2022. 12 王賢坤 . 機械 CAD/ CAM 技術、應用與開發(fā) .北京 : 機械工業(yè)出版社 .2022 13 劉華民 . 機械式多級升降平臺 .唐山專用汽車制造有限公司 . 14 何存興 . 液壓元件 .北京 :機械工業(yè)出版社 .1983 15 鄧昭明 . 機械設計基礎 .北京 : 高等教育出版社 . 2022 淮陰工學院畢業(yè)設計說明書 (論文) 第 30 頁 共 28頁 您好,為你提供優(yōu)秀的畢業(yè)論文參考資料,請您刪除以下內(nèi) 容, O(∩ _∩ )O 謝謝!?。?A large group of tea merchants on camels and horses from Northwest China39。 淮陰工學院畢業(yè)設計說明書 (論文) 第 28 頁 共 28頁 致 謝 本次畢業(yè)設計的整個過程中,從選題、 設計、制圖到撰寫論文,我得到了指導老師多方面的指導和幫助,也得到了一些同學的幫助和建議, 在此 感謝 孫長發(fā)老師和 楊大春老師 對我們的 悉心 指導,他 們 為人隨和,我們提出的問題都在第一時間給予解決,但對我們工作卻是從嚴要求,爭分奪秒的來做好畢業(yè)設計,他更是犧牲自己的休息時間來輔導我們完成畢業(yè)設計工作 。 目 前 液壓式彎板機早已投入生產(chǎn),不過現(xiàn)有液壓式彎板機的種類比較少, 通用性也不強。 同時 ,在液壓缸固定方式的選擇上,采用了將法蘭盤與普通液壓缸制作成一個整體,提高了液壓缸安裝后的穩(wěn)定性。 圖 模型圖 淮陰工學院畢業(yè)設計說明書 (論文) 第 27 頁 共 28頁 結(jié) 論 本課題設計的 對象 是液壓式槽型彎板機, 液壓式槽型彎板機 的主要執(zhí)行部件是伸縮式液壓缸 。 圖 壓桿 圖 4) 支撐板 支撐板固定在底座上,起到支撐和固定液壓缸的功能, 其形狀結(jié)構(gòu)如圖 。彎板機的總體 結(jié)構(gòu)安裝以及零件的定位見總體裝配圖。 設計液壓缸時將液壓缸與法蘭盤做成了一個整體,方便了液壓缸的安裝,結(jié)構(gòu) 如 下 圖所示。 該處液壓缸是垂直安裝的,應設在上方,因為該液壓缸的上腔是不需進油的,所以設計成直接與外界相通的,活塞處也只是用密封圈密封的,所以缸內(nèi)如果有空氣可以直接通過缸體上腔排出,無須另外設計排氣閥 ,為了排氣方便順暢,上部端蓋出還留有豁口。為了避免這種現(xiàn)象的發(fā)生,除了防止空 氣進入液壓系統(tǒng)外,必須在液壓缸上設排氣閥。 O 型密封圈 與 Y 型密封圈 的使用參數(shù)如表 311。表 310 為活塞桿與活塞的連接結(jié)構(gòu)。 ?s? 螺釘材料的流動極限( MPa) ; 所以由公式得 ? ?liQd ??41 ? = 6 ??? ?? mm ?1d 螺紋內(nèi)徑;普通螺紋 1d 值為 Sdd ?? ; ?S 螺紋的螺距。各缸前端蓋的螺釘受力情況差不多,最外面缸的前端蓋上的螺釘受力較大一些,在這里只要校核最外面缸的就可以了由公式 16 得: ? ? 623 ?? ????? ?Q N 39。 ? ? nsl ?? ? 淮陰工學院畢業(yè)設計說明書 (論文) 第 18 頁 共 28頁 表 39 各種鋼的屈服強度 鋼號 10 A2 A3 35 45 40Cr s? (MPa) 210 220 240 320 360 650~ 900 上式中 ?n 安全系數(shù),一般取 ~?n 對于 45 鋼取 ? ? M P a14 0 ??l? ?s? 螺釘材料的流動極限( MPa) ; 所以由公式得 ? ?l ii d ?? )(4 39。 這是因為螺紋根部橫截面是危險剖面,當進行擰緊時,在危險剖面上,同時 存在著拉應力和扭應力,而螺釘?shù)牟牧嫌质撬苄缘模虼?,根?jù)第四強度理論,用合成應力 合? 表示螺紋危險剖面上的應力加大 30%,以考慮螺釘受拉應力和扭應力的合成作用。sQ kQ? , ?k ~ 。 表 38 法蘭連接(圖示是后缸蓋的連接方式,前缸蓋是螺釘連接的) 連接方式 結(jié) 構(gòu) 形 式 圖 例 優(yōu) 缺 點 法蘭連接 優(yōu)點: (1) 結(jié)構(gòu)較簡單,成本低 (2) 容易加工, 便于裝拆 (3) 強度較大,能承受高壓 缺點: (1) 徑向尺寸較大 (2) 重量比螺紋連接的大
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