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步進送料機的畢業(yè)設計-wenkub.com

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【正文】 在此,對??以及機電工程系的各位領導和老師表示衷心感謝并致以崇高的敬意;對本次設計的指導老師李老師和各位給予我?guī)椭耐瑢W表示最誠摯的謝意! 本科畢業(yè)設計說明書(論文) 26 參考文獻 [1] 機械工程手冊編輯委員會編.機械設計手冊 [M].第 3版.北京:機械工業(yè)出版社,2021 [2] 宋寶玉 .步進送料機的設計及組裝實驗的開發(fā) .全國機械設計教學研討會議 .2021. [3] 裘建新 .《機 械原理課程設計指導書》 . 高等教育出版社 .2021 年 04 月 [4] 孫恒 . 《 機械原理 》 (第 7 版) . 高等教育出版社 . 2021 年 05月 [5]《機械設計課程設計》 周元康 林昌華 張海兵 編著 重慶大學出版社 2021 年 [6] 《機械設計師袖珍手冊》 毛謙德 李振清 主編 機械工業(yè)出版社 1994 年 [7] 《實用機械設計手冊上》中國農業(yè)機械化科學研究院編 中國農業(yè)機械出版 1985 年 [8]《礦山運輸機械 [M]》 于學謙 主編 中國礦業(yè)大學出版社 ,1998 年 . [9]《機械工程手冊》電機工程手冊編輯委員會編 1982 年 8月 . [10]《機械工程手冊 — 機械產品(二) [M].》 機械工業(yè)出版社 1982 年 8月 . [11]《現(xiàn)代機械設備設計手冊 — 非標準機械設備設計 [M]》范祖堯主編機械工業(yè)出版社 .2021 年 6月 . [12]《簡明機械設計手冊(第二版) [M].》唐金松 上??茖W技術出版社 .2021 年 6月 . [13]《 DTⅡ (A)型帶式輸送機機械設計手冊 [M]》北京起重機機械研究所、武漢豐凡科技開發(fā)有限責任公司 主編 冶金工業(yè)出版社 2021 年 8月 . [14] 《 ZJT1A96 帶式輸送機設計選用手冊 [M]》 機械工業(yè)部設計單位聯(lián)合設計組 主編 黃河水利出版社 .1998 年 10 月 . [15] 《機械化運輸設計手冊 [M]》機械化運輸設計手冊編委會 主編 機械工業(yè)出版社 .1997 年 5月 . [16] 《新型帶式輸送機設計手 冊 [M]》 張鉞 主編 冶金工業(yè)出版社 .2021 年 2月 . 本科畢業(yè)設計說明書(論文) 27 附 錄 一 英文資料: CONVEYOR SYSTEMS Conveyors are used when material must be moved in relatively large quantities between specific locations over affixed path. The fixed path is implemented by a track system, which may be inthefloor, abovethefloor, or overhead. Conveyors divide into two basic categories: (1) powered and (2) nonpowered. In powered conveyors, the power mechanism is contained in the fixed path, using chains, belts, rotating rolls, or other devices to propel loads along the path. Powered conveyors are monly used in automated material transport systems in manufacturing plants, warehouses, and distribution centers. In nonpowered conveyors, materials are moved either manually by human workers who push the loads along the fixed path or by gravity from one elevation to a lower elevation. Types of Conveyors A variety of conveyor equipment is mercially available. In the following paragraphs, we describe the major types of powered conveyors, anized according to the type of mechanical power provided in the fixed path. Roller and Skate Wheel Conveyors. These conveyors have rolls or wheels on which the loads ride. Loads must possess a flat bottom surface of sufficient area to span several adjacent rollers. Pallets, tote pans, or cartons serve this purpose well. The two main entries in this category are roller conveyors and skate wheel conveyors, pictured in Figure . In roller conveyors, the pathway consists of a series of tubes (rollers) that are perpendicular to the direction of travel, as in Figure (a). The rollers are 本科畢業(yè)設計說明書(論文) 28 contained in a fixed frame that elevates the pathway above floor level from several inches to several feet. Flat pallets or tote pans carrying unit loads are moved forward as the rollers rotate. Roller conveyors can either be powered or nonpowered. Powered roller conveyor are driven be belts or chains. Nonpowered roller conveyors are often driven by gravity so than the pathway has a downward slope sufficient to overe rolling friction. Roller conveyors are used in a wide variety of applications, including manufacturing, assembly, packaging, sortation and distribution. Skatewheel conveyors are similar in operation to roller conveyors. Instead of rollers, they use skate wheels rotating on shafts connected to a frame to roll pallets or tote pans or other containers along the pathway, as in Figure (b). This provides the skate wheel conveyor with a lighter weight construction than the roller conveyor. Applications of skatewheel conveyors are similar to those of roller conveyors, except that the loads must generally be lighter since the contacts between the loads and the conveyor are must more concentrated. Because of their light weight, skate wheel conveyors are sometimes built as portable equipment that can be used for loading and unloading truck trailers at shipping and receiving docks at factories and warehouses. Belt Conveyors. Belt conveyors consist of a continuous loop: Half its length is used for delivering materials, and the other half is the return run, as in Figure . The belt is made of reinforced elastomer (rubber), so that it possesses high flexibility but low extensibility. At one end of the conveyor is a drive roll that powers the belt. The flexible belt is supported by a frame that has rollers or support sliders along its forward loop. Belt conveyors are available in two mon forms: (1) flat belts for pallets, individual parts, or even certain types of bulk materials。 在他的指導下,我們學會了獨立查閱科研文獻,并且使我發(fā)現(xiàn)問題解決問題的能力有了很大的提高,當遇上問題向 ??老 師請教。這樣即培養(yǎng)了自己獨立分析問題解決問題能 力,又鍛煉了團隊合作能力。所謂的理論指導實踐,實踐又是檢驗真理的唯一標準,就已經體現(xiàn)在了設計過程中。這是我進入大學以來所做的最有意義、最新穎的設計也是綜合利用所學知識最多的一次設計。 結 論 設計的主要成果: (1) 熟練地掌握了步進送料機各部分的結構、原理和功能,了解了國內外的發(fā)展現(xiàn)狀。考慮到高速級大齒輪可能浸不到油,所以在大齒輪下安裝一小油輪進行潤滑。初選螺旋角 ?14?? 本科畢業(yè)設計說明書(論文) 18 .按齒面接觸強度設計 按公式試算,即 3 21 )][(12HEHdttt ZZuuTkd ??????? ( 51) 1 確定公式內的各計算數(shù)值 ( 1) 試選 ?tK ( 2) 選取區(qū)域系數(shù) ?HZ ( 3) 由 設計手冊 查得 ??? 2 ?? ? 12 ? ? ?? ? ?? ? ? ( 4) 計算小齒輪傳遞的轉矩 5 5 41 1 195 .5 10 / 95 .5 10 4. 24 4 / 14 40 2. 81 46 10T P n? ? ? ? ? ? ? Nmm? ( 52) ( 5) 由表選取齒寬系數(shù) 1??d ( 6) 由表查得材料的彈性影響系數(shù) 2/ MPaZ E ? ( 7) 由圖按齒面硬度查得小齒輪的接觸疲勞強度極 限 MPaH 6001lim ?? , 大齒輪的接觸疲勞強度極限 lim 2 550H MPa? ? ( 8) 由公式計算應力循環(huán)次數(shù) 91 60 60 14 40 1 ( 16 30 0 8 ) 3. 32 10hN njL? ? ? ? ? ? ? ? ? ( 53) 992 3. 32 10 / 4. 2 0. 79 0 10N ? ? ? ? ( 9) 由圖查得接觸疲勞強度壽命系數(shù) ?HNK ?HNK 本科畢業(yè)設計說明書(論文) 19 ( 10) 計算接觸疲勞強度許用應力 取失效概率為1%,安全系數(shù)為 S=1,由式得 MP aMP aSK HHNH ][ 1lim11 ???? ?? MP aMP aSK HHNH ][ 2lim22 ???? ?? ( 54) M P aM P aHHH )(2/])[]([][ 21 ????? ??? 2 計算 ( 1) 試算小齒輪分度圓直徑 td1 ,由計算公式得 2431 2 1 . 6 2 . 8 1 4 6 1 0 5 . 2 2 . 4 3 3 1 8 9 . 8 3 7 . 1 01 1 . 6 5 4 . 2 5 3 1 . 2 5td m m? ?
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