【正文】 0 80 316 24 79 40 80 340 24 85 40 80293 317 341 交換齒輪 交換齒輪 交換齒輪在軸桿上 在軸桿上 在軸桿上齒數(shù)Z在跨輪軸桿上后 前在分齒輪上齒數(shù)Z在跨輪軸桿上后 前在分齒輪上齒數(shù)Z在跨輪軸桿上后 前在分齒輪上abcdabcdabcd342 20 60 40 95 366 24 61 30 90 390 24 65 30 90343 367 391 344 24 100 25 43 368 30 92 40 100 392 24 60 30 98345 369 393 346 370 394 347 371 395 24 79 34 85348 30 90 24 58 372 24 62 30 90 396 30 90 20 55349 373 397 350 24 70 34 85 374 398 351 20 65 40 90 375 24 75 40 90 399 352 30 55 25 100 376 24 100 25 41 400 30 60 24 100353 377 354 24 59 30 90 378 20 70 40 90355 24 71 34 85 379 356 30 60 24 89 380 24 57 30 100357 381 358 382 359 383 360 24 60 30 90 384 30 60 25 100畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) 九 七 一 九 二 零 八 零 零全 套 資 料 請(qǐng) 加 Q22361 385 362 386 363 387 364 388 30 60 24 97365 24 73 34 85 389 當(dāng)選擇分齒掛輪的交換齒輪時(shí)，可以利用單頭滾刀為基礎(chǔ)的分齒掛輪齒數(shù)搭配表來(lái)選定齒輪齒數(shù)。使用雙頭滾刀時(shí)，在表中所查齒數(shù) Z 的值應(yīng)等于被滾齒數(shù)的一半，即若加工齒數(shù)為 120 齒，滾刀為雙頭，在搭配分齒輪時(shí)應(yīng)按 60 齒列表中去選取掛輪的齒數(shù)。 （計(jì)劃使用十年，每年 300 個(gè)工作日，每個(gè)工作日平均工作 8 小時(shí)） 蝸桿的輸入轉(zhuǎn)矩及輸入功率： 1440 fedcbaBAn ????428 36527190電 機(jī)蝸 桿 ?19205736BA 284badcfe其中： （變速掛輪）=～；BA （分度掛輪）= ；badc ~~0?刀n=～1；fe所以令 1)463.~(48 236579204max ?????蝸 桿n = 566 ?in/rmin/r為了避免過(guò)早的損壞分度蝸輪副，切削速度要受到蝸桿滑動(dòng)速度的限制，工作臺(tái)轉(zhuǎn)速不得大于 8 r/min，取 經(jīng)上式驗(yàn)算:80?i工作臺(tái)轉(zhuǎn)速 n = = r/min 8 r/mini/56r蝸桿輸出功率： =4% = 桿P8)(Kw畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) 九 七 一 九 二 零 八 零 零全 套 資 料 請(qǐng) 加 Q24 蝸桿的選?。焊鶕?jù) GB/T100851988 的推薦，采用普通圓柱蝸桿傳動(dòng)中的漸開(kāi)線(xiàn)蝸桿。蝸桿用鑄錫磷青銅ZCuSn10P1,金屬模鑄造。:根據(jù)閉式蝸桿傳動(dòng)的設(shè)計(jì)準(zhǔn)則，先按齒面接觸疲勞強(qiáng)度進(jìn)行設(shè)計(jì)，再校核齒根彎曲疲勞強(qiáng)度。1260EZMPa?（4）確定接觸系數(shù) ：?先假設(shè)蝸桿分度圓直徑 和傳動(dòng)中心距 的比值 ，從圖 1118（[5]）中可查得 。??39。0926NMPa????（6）計(jì)算中心距： （45）22332 103.()[] 67EPHZaKT m???? ?????取中心距 ，因 ，故從表 112（參考文獻(xiàn)[5]）中取模數(shù) ，5m?0i? ?蝸桿分度圓直徑 。39。Z??畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) 九 七 一 九 二 零 八 零 零全 套 資 料 請(qǐng) 加 Q26 蝸桿與蝸輪的主要參數(shù)與幾何尺寸 圖 普通圓柱蝸桿傳動(dòng)的基本幾何尺寸1）蝸桿：蝸輪蝸桿傳動(dòng)比： ，模數(shù)： ；80?i ?m蝸桿分度圓直徑： ；d631蝸桿導(dǎo)程角： ；54239。由于蝸輪輪齒的齒形比較復(fù)雜，要精確計(jì)算齒根的彎曲應(yīng)力是比較困難的，所以常用的齒根彎曲疲勞強(qiáng)度計(jì)算方法就帶有很大的條件性。從圖 1119（參考文獻(xiàn)[5]）??，螺旋角系數(shù) ；?????Y許用應(yīng)力： （48）FNFK?39。??畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) 九 七 一 九 二 零 八 零 零全 套 資 料 請(qǐng) 加 Q28壽命系數(shù)： （49）???則 n the market. The philosophical approach to a particular design depends somewhat on the kind of industry or the kind of machine. A chemical plant, which is a large and plicated machine, may be a oneshot proposition. One plant only is designed and built. If the design is not right, the mistakes are corrected on the job, an expensive but necessary procedure, until the plant operates as planned. The designer who works where only one product is made from the design develops attitudes or philosophies quite different, for instance, from an airplane or automotive designer. In the airplane industry, light weight and reliability ate if utmost importance. The philosophy of the airplane designer leads him to relatively highprecision (and highcost) designs, because the results are worth the money. Often the designed product is manufactured and operated under actual or simulated actual conditions, perhaps repeatedly, before the design is considered acceptable. In the automotive industry, the designer wants to be sure that his designer wants to be sure that his design is suitable for mass production. A subassembly design, such as the transmission, which will be made in quantities of hundreds of thousands or in millions, will be tested under actual operating conditions, because the “bug” need to be eliminated before mass production begins. In heavy industries such as the manufacture of large pressure vessels, the designer does not think in terms of the precision necessary in an airplane engine, nor is he particularly concerned about the weight. Moreover, there is no mass production in the automotive sense. If theory and practice do not agree, either theory or practice is wrong. Methods of design undergo an evolutionary process, just as a machine invariably evolves into better and better forms. New discoveries are made each day, but, because many theories are or bee inadequate, we never know when the accepted formula will be discarded. In any derivation, we first make certain assumptions in order to simplify the 畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) 九 七 一 九 二 零 八 零 零全 套 資 料 請(qǐng) 加 Q29Product liability actions have made it imperative that designers and panies employ the very best procedures in selecting materials. The five most mon faults in material selection have been: (a) failure to know and use the latest and best information available about the materials utilized。 (c) the use of materials about which there was insufficient or uncertain data, particularly as to its longterm properties。 and (e) material selection made by people who are pletely unqualified to do so.An examination of the faults above well lead one to conclude that there is no good reason why they should exist. Consideration of them provides guidance as to how they can be eliminated. While following the very best methods in material