【正文】 ?H? 中較小的值，求得小齒輪分度圓直徑的 1td 最小值為 畢業(yè)設(shè)計(jì)說明書（論文） 19 4 231 1 . 2 1 . 8 6 1 0 4 1 1 8 9 . 82 . 3 2 ( ) 3 6 . 3 10 . 8 4 5 7 2td m m? ? ?? ? ? ? 圓周速度： smndv t /10 0060 31 ????? ? 計(jì)算齒寬： 1 0 . 8 3 6 . 3 2 9 . 0 4dtb d m m? ? ? ? ? ? 計(jì)算齒寬與齒高比： 模數(shù) 113 6 .3 1 1 .5 124tt dm m m? ? ?? 齒高 2 . 2 5 2 . 2 5 1 . 5 1 3 . 4 0th m m m? ? ? ? ∴ ?? 計(jì)算載荷系數(shù)： 根據(jù) smv / 3??? 7 級(jí)精度，查得 動(dòng)載系數(shù) ?? 對(duì)于直齒輪 1???? ?? FH 查得使用系數(shù) 1A?? 用插值法查得 7 級(jí)精度小齒輪非對(duì)稱布置時(shí)， ??? 由 ? ， ??? 可查得 ??? 故載荷系數(shù) 1. 44A V H H??? ? ? ?? ?? ?? ? 校正分度圓直徑： 311 3 8 .5 8ttd d m m???? 計(jì)算模數(shù)： 11 dm mm??? ３ . 按齒根彎曲強(qiáng)度計(jì)算： 彎曲強(qiáng)度的設(shè)計(jì)公式為 ? ?3 211 )(2FSaFadm ? ??????? MPaMPaFEFE 38050021 ???? 12FN???? 取彎曲疲勞安全系數(shù) ?S 畢業(yè)設(shè)計(jì)說明書（論文） 20 ? ?? ?1112223 0 7 .1 42 4 1 .5 7F N F EFF N F EFM P aSM P aS?????????? 載荷系數(shù) 1. 41A V F F??? ? ? ?? ?? ?? ? 查取齒形系數(shù) 1 ?? 2 ?? 查取應(yīng)力校正系數(shù) 1 ?? 2 ?? ? ?? ?1112222 .6 5 1 .5 8 0 .0 1 3 6 33 0 7 .1 42 .1 9 1 .7 8 5 0 .0 1 6 22 4 1 .5 7F a S aFF a S aF??? ?? ???? ?? ??? 4322 1 . 4 1 1 . 8 5 7 1 0 0 . 0 1 6 2 1 . 2 30 . 8 2 4m m m? ? ?? ? ? ?? 圓整 mm? 261211????ZZ mdZ ４ . 幾何尺寸計(jì)： 分度圓直徑： 11222 6 1 .5 3 91 0 4 1 .5 1 5 6d m m md m m m? ? ? ? ?? ? ? ? ? 中心距： 12 9 7 .52dda m m??? 齒輪寬度： 1 d mm? ? ? 取 2 35B mm? 1 40B mm? 至此，高速級(jí)齒輪的計(jì)算完畢 。根據(jù)標(biāo)準(zhǔn) ，軸的左右端倒角均為 1*450 二中間軸的軸系結(jié)構(gòu)設(shè)計(jì) 1軸的結(jié)構(gòu)尺寸設(shè)計(jì) 根據(jù)結(jié)構(gòu)幾使用要求該軸設(shè)計(jì)成階梯軸且為齒輪軸 ,共分五段 ,其中第 II 段和第 IV 段為齒輪 ,如下圖 6 所示 : 由于結(jié)構(gòu)及 工作需要將該軸定為齒輪軸 ,因此其材料須與齒輪材料相同 ,均為合金鋼 ,熱處理為滲碳淬火 ,取材料系數(shù) 0 112A? 所以 ,有該軸的最小軸徑為 : 2332 1 022 . 6 91 1 2 2 0 . 6 44 2 9 . 8 5Pd A m mn? ? ? ? ? 因鍵槽開在中間，其影響不預(yù)考慮 標(biāo)準(zhǔn)化取 2521?d 其他各段軸徑、長(zhǎng)度的設(shè)計(jì)計(jì)算依據(jù)和過程見下表： 表 5 中間軸結(jié)構(gòu)尺寸設(shè)計(jì) 階梯軸段 設(shè)計(jì)計(jì)算依據(jù)和過程 計(jì)算結(jié)果 第 I 段 2321 02PdAn?? 由軸承尺寸確定 (軸承預(yù)選 6005 2 12B? ) 11hL B B?? 25 22 畢業(yè)設(shè)計(jì)說明書（論文） 25 第 II 段 212122 ddd ???? ??? 2222 %)121( dd (考慮鍵槽影響 ) 齒寬?22L 30 40 第 III 段 222223 ddd ??? 412 ??L 36 10 第 IV 段 2224 dd ? 齒寬?24L 30 50 第 V 段 2125 dd ? 232422123025 BLBLL z ?????????? 低 25 22 2軸的受力分析及計(jì)算 軸的受力計(jì)算 由高速軸的受力分析知： Ft= Fr= 222222 2 7 1 3 5 0 570025ta n 5 7 0 0 ta n 2 0 2 0 7 4 .6 3tr t nTFdFF ??? ? ?? ? ? ? ? 3軸承的選擇 軸承采用 6005 型深溝球軸承，主要承受徑向載荷也可同時(shí)承受小的軸向載荷，大量生產(chǎn)，價(jià)格最低 . 內(nèi)徑 d=25mm 外徑 D=47mm 寬度 B=12mm 4軸上零件的周向固定 為了保證良好的對(duì)中性，齒輪與軸選用過盈配合 H7/r6。根據(jù)標(biāo)準(zhǔn) ，軸的左右端倒角均為 1*4 四、軸的強(qiáng)度校核 經(jīng)分析知 C處為可能的危險(xiǎn)截面， 現(xiàn)來校核 C處的強(qiáng)度： （ 1）、合成彎矩 22229241151rA A H A VrB B H B VF F FF F F? ? ?? ? ?1151C rBMF?? （ 2）、當(dāng)量彎矩 223( ) 1 1 5 1 7 .7CCM M T?? ? ? ? （ 3）、校核 由手冊(cè)查材料 45的強(qiáng)度參數(shù) MPab 59][ 1 ??? C截面當(dāng)量彎曲應(yīng)力： 331 ( 45 ) 4 [ ]CCCbMd?? ??? ????? 由計(jì)算結(jié)果可見 C 截面安全。 5 定位銷 常采用圓錐做定位銷。因此，機(jī)械課程畢業(yè)設(shè)計(jì)對(duì)于培養(yǎng)學(xué)生對(duì)機(jī)械運(yùn)動(dòng)機(jī)構(gòu)的構(gòu)思和設(shè)計(jì)能力起到至關(guān)重要的作用。s own numerical control technology and industry, and implement blockading and restrictive policy to our country in highgrade , precision and advanced key technology and equipment of numerical control. In a word, develop taking technology of numerical control as the 畢業(yè)設(shè)計(jì)說明書（論文） 35 core advanced manufacturing technology bee world all developed country , accelerate economic development already in a more costeffective manner, important route to improve the prehensive national strength and national position. Numerical control technology to go on technology that control with digital information to mechanical movement and working course, numerical control equipment whether represented by technology of numerical control new technology make industry and new developing infiltration electromechanics integrated product that form of manufacturing industry to tradition, . what is called digitization equip, its technological range covers a lot of fields: (1)Mechanical manufacturing technology。s spare parts are mostly the thin wall and thin muscle, rigidity very bad, material aluminium or aluminium alloy, in high to cut pace and cut strength very under the little situation only, could process these muscles , walls . Adopt largescale whole aluminium alloy blank method of pay empty make the wing recently, largescale parts such as the fuselage ,etc. e to substitute a lot of parts to assemble through numerous rivet , screw and other connection ways, make the intensity , rigidity and dependability of the ponent improved. All these requirement for processing and equipping and proposing highspeed , high and precise and high flexibility. According to EMO2021 exhibition situation, the highspeed machining center enters for the pace to can reach 80m/min , even high, air transport petent pace can reach 100m/min about. A lot of car factories in the world at present, including Shanghai General Motors Corporation of our country, adopt , substitute and make the lathe up with highspeed machining center production line part that make up already. HyperMach lathe of Company , CINCINNATI of . , enter , give pace to be most loud to reach 60m/min, it is 100m/min to be fast, acceleration reach 2g, the rotational speed of the main shaft has already reached 60 000r/min. Processing a thin wall of plane parts, spend 30min only, and same part general at a high speed milling machine process and take 3h, process and need 8h with ordinary milling machine。 (3)Automatic control technology。 畢業(yè)設(shè)計(jì)說明書（論文） 32 致 謝 本文從選題、方案論證到課題的研究都是在導(dǎo)師 張紅麗老師 的全面、悉心指導(dǎo)下完成的。 畢業(yè)設(shè)計(jì)說明書（論文） 31 總 結(jié) 設(shè)計(jì)畢業(yè)設(shè)計(jì) 十六周時(shí)間