【正文】 Festival. In this day, girls will throw a sewing needle into a bowl full of water on the night of Qixi as a test of embroidery skills. If the needle floats on top of the water instead of sinking, it proves the girl is a skilled embroiders. Single women also pra y for finding a goo。s time for the wild fruits to ripe. The picturesque Arxan in Autumn is indeed a fairyland only exists in a dream that satisfies all your fantasies. If it rains heavily on Saturday night, some elderly Chinese will say it is because Zhinu, or the Weaving Maid, is crying on the day she met her husband Niulang, or the Cowherd, on the Milky Way. Most Chinese remember being told this romantic tragedy when they were children on Qixi, or the Seventh Night Festival, which falls on the seventh day of the seventh lunar month, which is usually in early August. This year it falls on Saturday, August 2. Folklore Story As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sisterinlaw. But she disliked and abused him, and the boy was forced to leave home with only an old cow for pany. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress. The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He ordered the heaven troop to catch Zhinu back. Niulang grew desperate when he discovered Zhinu had been taken back to heaven. Driven by Niulang39。 ll 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 geous 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 on the vast alpine snowscape. Hinggan League Arxan city is situated in the far eastern area of Inner Mongolia Autonomous Region. Its full name Haren Arxan means hot holy water in the Mongolian language. Arxan is a tourism city in the northern frontier with a blend of large forest, grand prairies, vast snowfield, heaven lake cluster, thermium, as well as volcanic cluster. It is a rare and unique ecotourism base filled with healthy sunshine, clean air and unspoiled green. Nestled close to the country39。 我非常慶幸在三年的的學習、生活中認識了很多可敬的老師和可親的同學，并感激師友的教誨和幫助。感謝各位老師在三年之中的教導和在做設(shè)計的過程中對我的幫助。 引線片沖裁件沖裁工藝及模具設(shè)計 29 致 謝 首先感謝本人的導師翟德梅老師，她仔細審閱了本文的全部內(nèi)容并對我的畢業(yè)設(shè)計內(nèi)容提出了許多建設(shè)性建議。 從陌生到開始接觸，從了解到熟悉，這是每個人認識事物所必經(jīng)的一般過程，我對模具的認識過程亦是如此。 沖壓模具設(shè)計則是依據(jù)制定的沖壓工藝規(guī)程，在認真考慮毛坯的定位、出件、廢料排出諸問題以及模 具的制造維修方便、操作安全可靠等因素后，設(shè)計計算并構(gòu)思出與沖壓設(shè)備想適應(yīng)的模具總體結(jié)構(gòu)，然后繪制出模具總裝圖和所有非標準零件圖的整個設(shè)計繪圖過程。 冷沖壓工藝設(shè)計是針對給定的產(chǎn)品圖樣，根據(jù)其生產(chǎn)批量的大小、沖壓設(shè)備的類型規(guī)格、模具制造能力及工人技術(shù)水平等具體生產(chǎn)條件，從對產(chǎn)品零件圖的沖壓工藝性分析入手經(jīng)過必要的工藝計算，制定出合理的工藝方案，最后編寫沖壓工藝卡的一個綜合分析、計算、設(shè)計過程。 通過這次設(shè)計，我更加深入地學習了冷沖壓技術(shù)工作設(shè)計的內(nèi)容。 在設(shè)計的過程中通過沖壓模具設(shè)計手冊、模具制造簡明手冊、模具標準應(yīng)用手冊等對所要設(shè)計的問題進行查詢，通過更多的途徑去了解我要做的設(shè)計，使設(shè)計更具合理性。特別是原來所學的一些專業(yè)基礎(chǔ)課：如機械制圖、模具材料、公差配合與技術(shù)測量、冷沖模具設(shè)計與制造等有了更深刻的理解，使我進一步 的了解了怎樣將這些知識運用到實際的設(shè)計中。 通過這次畢業(yè)設(shè)計使我從新系統(tǒng)的復習了所學專業(yè)知識，同時也鞏固了先前學到的知識，同時感觸最深刻的是：所學知識只有在應(yīng)用中才能更深刻理解和長時間記憶。 河南機電高等專科學校畢業(yè)設(shè)計說明書 28 設(shè) 計 總 結(jié) 本畢業(yè)設(shè)計是我進行完了三年的模具設(shè)計與制造專業(yè)課程后進行的，它是對我們?nèi)陙硭鶎W課程的又一次深入、系統(tǒng)的綜合性的復習，也是一次理論聯(lián)系實踐的訓練。 3 裝配下模 1) 在下模座上劃中心線，按中心預(yù)裝凹模、導料板； 2) 在下模座、導料板上，用已加工好的凹模分別確定其螺孔位置，并分別鉆孔，攻絲； 3) 將下模座、導料板、凹模、固定擋料銷裝在一起，并用螺釘緊固，打入銷釘。不合適者應(yīng)重新修磨或更換。具體裝配見下表（ 4）所示： 表（ 4） 引線片級進模的裝配 序號 工 序 工 藝 說 明 1 凸、凹模預(yù)配 1) 裝配前仔細檢查各凸模形狀及尺寸以及凹模形孔，是否符合圖紙要求尺寸精度、形狀。 河南機電高等?？茖W校畢業(yè)設(shè)計說明書 22 圖 5引線片級進模裝配圖 凹模 螺釘 導料板 彈性橡膠體 導套 螺釘 下模座 模柄 止 轉(zhuǎn) 銷 銷釘 1墊板 1導柱 1 凸模固定板 1 螺釘 1卸料板 1側(cè)刃切刀 1銷釘 1 螺釘 下模座 引線片沖裁件沖裁工藝及模具設(shè)計 23 7 模具零件加工工藝 本副沖裁模，模具零件加工的關(guān)鍵在工作零件、固定板以及卸料板，若采用線切割加工技術(shù)，這些零件的加工就變得相對簡單。下模部分由下模座、凹模板、導料板等組成。模具上模部分主要由上模座、墊板、凸模（ 8個）、凸模固定板及卸料板等組成。 模具的閉合高度為 :30mm+8mm+16mm+12mm+16mm+16mm+40mm=138mm,小于壓力機的最小閉合高度，因此選用的設(shè)備合適。 : 與 橡膠壓縮量有關(guān)的單位 MPa,查表 878[7]壓縮量取 30%， p??； （ 2）橡膠的高度尺寸 使用橡膠時，不應(yīng)使最大相對壓縮量過大，避免橡膠過早失去彈性而損壞，其允許最大壓縮量應(yīng)不超過自由高度的 45%,一般取 H總 =(～ )H自 由 工作行程計算式，可得自由高度 H自 由 = 作 =（ 4） H工 作 H工 作 ：卸料板或者推件板壓邊工作行程與磨具修邊量或者調(diào)整量 4 6mm河南機電高等專科學校畢業(yè)設(shè)計說明書 20 之和再加 1mm 經(jīng)計算得 H總=12mm (3)校核 橡膠的自由高度 h 與直徑 D 之比滿足大于 小于 的要求，故而選用的橡膠合理 模柄的選用 根據(jù)初選設(shè)備 J2325模柄孔的尺寸，查得 JB/ 得：壓入式模柄 40 60，材料為 Q235 鋼； 導柱與導套的選擇 查 GB/ 和 GB/ 得： 導柱： 20*130，材料為 20鋼，表面用滲碳處理； 導套： 20*70*28，材料為 20 鋼，表