【導(dǎo)讀】本次畢業(yè)設(shè)計(jì)完成了大直徑樁基礎(chǔ)工程成孔鉆具I型鉆具總體設(shè)計(jì)。同時(shí)，本設(shè)計(jì)在AutoCAD的基礎(chǔ)上，完成了該型鉆具的總裝圖和絕大部分零件。設(shè)計(jì)后的鉆具配套功率小，既能夠產(chǎn)生旋轉(zhuǎn)運(yùn)動(dòng)又能產(chǎn)生沖擊運(yùn)動(dòng)，且利用。氣舉反循環(huán)排渣快速成孔。米左右，進(jìn)口設(shè)備成孔直徑已可達(dá)6米。鉆，對(duì)工程地質(zhì)條件變化的適應(yīng)性差，特別是不適應(yīng)大礫石地質(zhì)和無風(fēng)化硬巖層成孔，地質(zhì)適應(yīng)范圍受限。施工單位采取沉井明挖法施工失敗。在第二個(gè)枯水施工季節(jié)，終于以60多萬的價(jià)格，新購(gòu)置到重型沖擊鉆機(jī)設(shè)備，開始進(jìn)行返工施工。韶關(guān)產(chǎn)沖擊錘重達(dá)13噸，配套設(shè)備。均是個(gè)別設(shè)計(jì)生產(chǎn)，使用直徑公分鋼絲繩。由于錘重繩粗，常規(guī)的設(shè)備匹配和連接。1#樁基出現(xiàn)了嚴(yán)重的孔壁失圓現(xiàn)象，明顯地影響了工程質(zhì)量、進(jìn)度和效率。而不排水施工可避免發(fā)生沉井嚴(yán)重偏位、沉井滯。留和井口沉陷以及下沉緩慢等諸多問題。目投資的主要不定因素。鑒于以上情況，為適應(yīng)各類建筑工程材料、設(shè)計(jì)和施工技術(shù)的

　　

【正文】 降低了鉆孔成本。 本人在這次設(shè)計(jì)中最大的感受是：理論與實(shí)踐必須相結(jié)合，只有將正確的理論應(yīng)用于實(shí)踐中，才能真正發(fā)揮理論的價(jià)值，才能更深刻地了解和掌握理論的真正內(nèi)涵；要作到理論與實(shí)踐相結(jié)合必須有一定的理認(rèn)基礎(chǔ)和豐富的實(shí)踐經(jīng)驗(yàn)，在這方面，我很欠缺，還在待于在日后的進(jìn)一步學(xué)習(xí)和工作中來彌補(bǔ)和提高，此外，設(shè)計(jì)工作是一項(xiàng)繁重的工作，必須具有嚴(yán)謹(jǐn)細(xì)致的工作作風(fēng)和頑強(qiáng)的決心和毅力。 如需更多全套圖紙和論文資料，請(qǐng)聯(lián)系扣扣九七一九二零八零零 參考文獻(xiàn) [1]孫恒，陳作模 . 機(jī)械原理 [M].北京： 高等教育 出版社 ， 2020 [2]濮良貴，紀(jì)名剛 .機(jī)械設(shè)計(jì) [M].北京：高等教育出版社， 2020 [3]王伯惠，上官興著 .中國(guó)鉆孔灌注樁新發(fā)展 [M].北京：人民交通出版社， 1999 [4]吳宗澤，羅圣國(guó) . 機(jī)械設(shè)計(jì)課程設(shè)計(jì) [M].北京：高等教育出版社， 1999 [5]鄒慧君 . 機(jī)械原理課程設(shè)計(jì)手冊(cè) [M].北京：高等教育出版社， 1998 [6] 范欽珊 . 材料力學(xué) [M].北京：高等教育出版社， [7]《現(xiàn)代機(jī)械傳動(dòng)手冊(cè)》編輯委員會(huì) .現(xiàn)代機(jī)械傳動(dòng)手冊(cè) [M].北京： 機(jī)械工業(yè)出版社， 2020 [8]成大先 .機(jī)械設(shè)計(jì) 手冊(cè) (第 5 卷 ) [M].北京：化學(xué)工業(yè)出版社， 2020 [9]劉古岷，王渝，胡國(guó)慶 .樁工機(jī)械 [M].北京：機(jī)械工業(yè)出版社， 2020 [10] 成大先 . 機(jī)械設(shè)計(jì)圖冊(cè) (第 5卷 )[M].北京：化學(xué)工業(yè)出版社， 2020 [11]《機(jī)械工程手冊(cè)》編委會(huì) .機(jī)械工程手冊(cè) (第 11 卷機(jī)械產(chǎn)品 (一 )) [M]. 北京：機(jī)械工業(yè)出版社， 1982 [12]郭愛蓮 .新編機(jī)械工程技術(shù)手冊(cè) [M].北京：經(jīng)濟(jì)日?qǐng)?bào)出版社， 1991 [13]日本機(jī)械學(xué)會(huì) . 機(jī)械技術(shù)手冊(cè) [M].北京：機(jī)械工業(yè)出版社， 1975 [14]《機(jī)械工程手冊(cè) 》編委會(huì) .機(jī)械工程手冊(cè) (專用機(jī)械卷 (二 ))[M]：北京：機(jī)械工業(yè)出版社， 1997 [15]汪應(yīng)洛 .英漢機(jī)電工程技術(shù)詞匯 [M].北京：科學(xué)出版社， 1991 [16]吳宗澤 .機(jī)械設(shè)計(jì)禁忌 500 例 [M].北京：機(jī)械工業(yè)出版社， 1996 [17]卜炎 . 機(jī)械傳動(dòng)裝置設(shè)計(jì)手冊(cè) [M]. 北京：機(jī)械工業(yè)出版社， 1997 [18]吳宗澤、雷天覺 .機(jī)械設(shè)計(jì)實(shí)用手冊(cè) [M].北京：化學(xué)工業(yè)出版社， 1999 [19] 《 齒輪手冊(cè) 》 編委會(huì) . 齒輪手冊(cè) [M].北京：機(jī)械工業(yè)出版社， 2020 [20]李維榮 .標(biāo)準(zhǔn)緊固件實(shí)用手冊(cè) [M].北 京：中國(guó)標(biāo)準(zhǔn)出版社， 2020 [21]機(jī)械工業(yè)部 .氣動(dòng)元件產(chǎn)品樣本 [M].北京：機(jī)械工業(yè)出版社， 1985 如需更多全套圖紙和論文資料，請(qǐng)聯(lián)系扣扣九七一九二零八零零 致謝 如需更多全套圖紙和論文資料，請(qǐng)聯(lián)系扣扣九七一九二零八零零 附錄 1 GEAR Spur and helical gears. A gear having tooth elements that are straight and parallel to its axis is known as a spur gear. A spur pair can be used to connect parallel shafts only. Parallel shafts, however, can also be connected by gears of another type, and a spur gear can be mated with a gear of a different type. (). To prevent jamming as a result of thermal expansion, to aid lubrication, and to pensate for avoidable inaccuracies in manufacture, all powertransmitting, gears must have backlash. This means that on the gear, and vice versa. On instrument gears, backlash can eliminated by using a gear split down its middle, one half being rotatable relative to the other. A spring forces the split gear teeth to occupy the full width of the pinion space. Helical gears have certain advantages。 for example, when connecting parallel shafts they have a higher loadcarrying than spur gears with the same tooth numbers and cut with the same cutter. Because of the overlapping action of the teeth, they are smoother in action and can operate at higher pitchline to the axis of rotation, helical gears create an axial thrust. If used singly, this thrust must be absorbed in the same blank. Depending on the method of manufacture, the gear may be of the continuoustooth herringbone variety or a doublehelical gear with a space between the two halves to permit the cutting tool to run out. Doublehelical gears are well suited for the efficient transmission of power at highspeeds. Helical gears can also be used to connect nonparallel, nonintersecting shafts at any angle to one another. Niy degrees is the monest angle at which such gears are used. Worm and bevel gears. In order to achieve line contact and improve the loadcarrying capacity of the crossedaxis helical gears, the gear can be made to curve partially around the pinion, in somewhat the same way that a nut envelops a screw. The result would be a cylindrical worm and gear. Worm gears provide the simplest means of obtaining large rations in a single pair. They are usually less efficient than parallelshaft gears, however, because of an additional sliding movement along the teeth. Because of their similarity, the efficiency of a worm and gear depends on the same factors as the efficiency of a screw. Singlethread worms of large diameter have small lead angles and low efficiencies. Multiplethread worms have larger lead angles and higher efficiencies() For transmitting rotary motion and torque around corners, bevel gears are monly 如需更多全套圖紙和論文資料，請(qǐng)聯(lián)系扣扣九七一九二零八零零 used. The connected shafts, whose axes would intersect if extended, are usually but not necessarily at right angles to one another. When adapted for shafts that do not intersect, spiral bevel gears are called hypoid gears. The pitch surfaces of these gears are not rolling cones, and the ratio of their mean diameters is not equal to the speed Consequently, the pinion may have few teeth and be made as large as necessary to carry the load. The profiles of the teeth on bevel gears are not involutes。 they are of such a shape that the tools for the teeth are easier to make and maintain than involute cutting tools. Since bevel gears e in, as long as they are conjugate to one another they need not be conjugate to other gears with different both numbers. 1 Early History of Gearing The earliest written descriptions of gears are said to have been made by Aristotle in the fourth century . It has been pointed out that the passage attributed to Aristotle by some was actually from the writings of his school, in “Mechanical Problems of Aristotle”( ). In the passage in question, there was no mention of gear teeth on the parallel wheels, and they may just as well have been smooth wheels in frictional contact. Therefore, the attribution of gearing to Aristotle is, most likely, incorrect. The real beginning of gearing was probably with Archimedes who about 250 . invented the endless screw turning a toothed wheel, which was used in engines of war. Archimedes also used gears to simuearly forms of wagon mileage indicators (odometer) and surveying instruments. These devices were probably “thought” experiments of Heron of Alexandria (ca. ), who wrote on the subjects of theoretical mechanics and the basic elements of mechanism. The oldest surviving relic containing gears is the Antikythera mechanism, so named because of the Greek island of that name near which the mechanism was discover