【正文】 s Day. More and more young Chinese people begin to celebrate this 。 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 pray for finding a good husband in the future. And the newly married women pray to bee pregnant quickly. Tradition transformed The love story of Niulang and Zhinu, and the Qixi Festival have been handed down for generations. Yet these ancient traditions and customs are slowly dying out. Many modern Chinese, particularly youngsters, seem to know more about St Valentine39。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。The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. s largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. 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 gorgeous 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. 然后還要感謝所有關(guān)心、支持、幫助過我的良師益友。除了敬佩賀老師的專業(yè)水平外，他的治學(xué)嚴謹和科學(xué)研究的精神也是我永遠學(xué)習(xí)的榜樣，并將積極影響我今后的學(xué)習(xí)和工作。許 老師平日里工作繁多，但在我做畢業(yè)設(shè)計的每個階段，從外出實習(xí)到查閱資料，設(shè)計草案的確定和修改，中期檢查，后期詳細設(shè)計，程序調(diào)試等整個過程中都給予了我悉心的指導(dǎo)。[15] 樂兌謙，金屬切削刀具，機械工業(yè)出版社，2005：417。[13] 廖念釗，莫雨松，李碩根，互換性與技術(shù)測量[M]，中國計量出版社，2000：919。[11] 東北重型機械學(xué)院，洛陽農(nóng)業(yè)機械學(xué)院，長春汽車廠工人大學(xué)，機床夾具設(shè)計手冊[M]，上海：上?？茖W(xué)技術(shù)出版社，1980。劉文劍，曹天河，趙維，夾具工程師手冊[M]，哈爾濱：黑龍江科學(xué)技術(shù)出版社，1987。[8] [周永強，高等學(xué)校畢業(yè)設(shè)計指導(dǎo)[M]，北京：中國建材工業(yè)出版社，2002。機床夾具設(shè)計手冊［Ｍ］?；瘜W(xué)工業(yè)出版社，2004。[6] 黃如林，劉新佳，汪群。金屬切削手冊［Ｍ］。機械工業(yè)出版社，1995。[4] 張進生。機床夾具設(shè)計［Ｍ］。北京出版社，1996。[2] 李洪。參 考 文 獻[1] 東北重型機械學(xué)院，洛陽農(nóng)業(yè)機械學(xué)院，長春汽車廠工人大學(xué)。 畢業(yè)設(shè)計是我在學(xué)校的最后一次答卷，我也把它看成是我邁向社會的第一步。 在設(shè)計過程中，賀老師給予了我悉心指導(dǎo)，提出好的建議，使我獲益良多。根據(jù)了解的類似結(jié)構(gòu)進行仔細分析，再進行適當(dāng)?shù)母倪M、創(chuàng)新，爭取用最低的成本實現(xiàn)最先進的功能。 在本次課程設(shè)計的制作過程中，我深深的體會到一個看似簡單的機構(gòu)其實并不像我們想象中的那么簡單，它所要考慮的東西還很多。這樣，在設(shè)計時就必須考慮，所設(shè)計的機構(gòu)是否合理在實際運用中能否正常工作。畢業(yè)設(shè)計是理論聯(lián)系實際的最有效方法。夾具設(shè)計部分，主要是銑槽和鏜孔的夾具設(shè)計，包括定位方案及定位元件的設(shè)計，夾緊裝置的設(shè)計，對刀裝置的設(shè)計，夾具體的設(shè)計。 其示意圖如下：4．全文總結(jié)本設(shè)計分為二個部分：工藝規(guī)程設(shè)計、夾具設(shè)計。 工件通過夾具上的螺旋夾緊裝置牢牢的固定在底座上。毛坯的材料為HT200. 技術(shù)要求： 夾具體鑄成后應(yīng)清理鑄件，并進行時效處理 鑄件不得有砂眼、氣孔、縮松、裂紋等缺陷 零件加工表面上，不應(yīng)有劃痕、擦傷等損傷所設(shè)計的支架示意圖如下：該底座用鑄造方法來制作毛坯。底座上還應(yīng)設(shè)置供起吊用的吊環(huán)或起重螺栓。因此支架和底座的剛性要好，變形小。其動力部分由人力提供。該回轉(zhuǎn)式鏜套，徑向尺寸小，有較好的抗震性，適用于孔徑較小，轉(zhuǎn)速不高的半精加工。如下圖所示：該固定式鏜套，外形尺寸小，結(jié)構(gòu)簡單，同軸度好，適用于低速擴孔、鏜孔。且方案一方便夾具的設(shè)計制造所以選擇方案一來作為定位方案。方案二：工件在夾具中的定位以端面為重要定位基準，限制3個自由度，底面限制2個自由度，側(cè)面限制1個自由度方案一，作為重要基準的底面已是經(jīng)過粗加工的，可以作為基準，來保證孔的加工質(zhì)量。鏜桿1上撥動銷3插入接頭體2的槽中，鏜桿與接頭體之間留有浮動間隙，能補償鏜桿軸線與機床主軸軸線間的角度和平移偏差?；瑝K磨損后，可在滑塊底部加墊片，重新修磨外圓。圖d是鑲滑塊的導(dǎo)引結(jié)構(gòu)，它與導(dǎo)套的摩擦面積小，容屑量大，不易“卡死”。但結(jié)構(gòu)簡單，剛性好。 鏜孔工具設(shè)計 鏜桿設(shè)計鏜桿引導(dǎo)