機械畢業(yè)設(shè)計-機床主軸箱結(jié)構(gòu)設(shè)計（含CAD圖紙全套）
機械畢業(yè)設(shè)計-機床主軸箱結(jié)構(gòu)設(shè)計（含CAD圖紙全套）,機械,畢業(yè)設(shè)計,機床,主軸,結(jié)構(gòu)設(shè)計,cad,圖紙,全套
外文資料翻譯
Electromechanical integration technology and its application
An electromechanical integration technology development
Mechatronics is the machinery, micro-, control, aircraft, information processing, and other cross-disciplinary integration, and its development and progress depends on the progress of technology and development, the main direction of development of a digital, intelligent, modular, and human nature , miniaturization, integration, with source and green.
1.1 Digital
Microcontroller and the development of a number of mechanical and electrical products of the base, such as the continuous development of CNC machine tools and robots, and the rapid rise of the computer network for the digital design and manufacturing paved the way for, such as virtual design and computer integrated manufacturing. Digital request electromechanical integration software products with high reliability, easy operability, maintainability, self-diagnostic capabilities, and friendly man-machine interface. Digital will facilitate the realization of long-distance operation, diagnosis and repair.
Intelligent 1.2
Mechanical and electrical products that require a certain degree of intelligence, it is similar to the logical thinking, reasoning judgement, autonomous decision-making capabilities. For example, in the CNC machine increase interactive features, set up Intelligent I / O interface and intelligent database technology, will use, operation and maintenance of bring great convenience. With fuzzy control, neural network, gray, wavelet theory, chaos and bifurcation, such as artificial intelligence and technological progress and development and the development of mechanical and electrical integration technology has opened up a vast world.
Modular 1.3
As electromechanical integration products and manufacturers wide variety of research and development of a standard mechanical interface, dynamic interface, the environment interface modules electromechanical integration products is a complex and promising work. If the development is set to slow down. VVVF integrated motor drive unit with vision, image processing, identification and location of the motor functions, such as integrated control unit. Thus, in product development, design, we can use these standards modular unit quickly develop new products.
1.4 Network
As the popularity of the network, network-based remote control and monitoring of various technical ascendant. The remote control device itself is the integration of mechanical and electrical products, fieldbus technology to household appliances and LAN network possible, use a home network to connect various home appliances into a computer as the center of computer integrated appliances system, so that people in the home can be full enjoyment of the benefits of various high-tech, therefore, electromechanical integration products should be no doubt North Korea networks.
1.5 humanity
Electromechanical integration of the end-use product is targeted, how to give people electromechanical integration of intelligent products, emotion and humanity is becoming more and more important, electromechanical integration products in addition to improving performance, it also urged the color, shape and so on and environmental coordination, the use of these products, or for a person to enjoy, such as home robot is the highest state of human-machine integration.
1.6 miniaturization
Micro-fine processing technology is a necessity in the development, but also the need to improve efficiency. MEMS (Micro Electronic Mechanical Systems, or MEMS) refers to quantities can be produced by the micro-collection agencies, micro-sensors, micro actuators and signal processing and control circuit until interface, communication and power is one of the micro-devices or systems . Since 1986 the United States at Stanford University developed the first medical microprobe, 1988 at the University of California, Berkeley developed the first micro-motor, both at home and abroad in MEMS technology, materials and micro-mechanism much progress has been made, the development of all sorts MEMS devices and systems, such as the various micro-sensors (pressure sensors, micro-accelerometer, micro-tactile sensor), various micro-component (micro-film, micro-beam, microprobes, micro-link, micro-gear, micro-bearings, micro-pump , microcoil and micro-robot, etc.).
1.7 Integration
Integration includes a mutual penetration of various technologies, and integration of various products of different structural optimization and composite, and included in the production process at the same time processing, assembly, testing, management, and other processes. In order to achieve more variety, small batch production of automation and high efficiency, the system should have a more extensive flexible. First system can be divided into several levels, allowing the system to function dispersed, and security and coordination with other parts of the operation, and then through software and hardware at various levels will be organically linked to its optimal performance, the most powerful.
1.8 with source of
Electromechanical integration refers to the product itself with energy, such as solar cells, fuel cells and large-capacity battery. As on many occasions not be able to use electricity, which campaigns for the mechanical and electrical integration products, has a unique power source comes with the benefits. Sources with the integration of mechanical and electrical product development direction of.
Green 1.9
The development of technology in people's lives brought great changes in the material at the same time has also brought rich resources, deterioration of the ecological environment consequences. Therefore, people calling for the protection of the environment, regression, and achieving sustainable development in the concept of green products such calls have emerged. Green products is low-power, low-wood consumption, clean, comfortable, coordination and utilization of renewable products. In its design, manufacture, use and destruction of human beings should be in line with environmental protection and health requirements, electromechanical integration of green products is mainly refers to the use of time is not pollute the ecological environment, at the end of product life, and regeneration of decomposition products.
2 electromechanical integration in the application of technology in the iron and steel
In the iron and steel enterprises, the integration of mechanical and electrical systems are at the core microprocessor, the computer, industrial computer, data communications, display devices, meters and the combination of technologies such as organic, assembled by the merger means for the realization of a large-scale integrated system create conditions for effective integration, enhanced system control precision, quality and reliability. Electromechanical integration technology in the iron and steel enterprises in the mainly used in the following areas:
2.1 Intelligent Control Technology (IC)
As a large-scale iron and steel, high-speed continuous and the characteristics of the traditional control technologies encountered insurmountable difficulties, it is necessary to adopt very intelligent control technology. Control technologies include intelligent expert system, neural and fuzzy control, intelligent control techniques in steel product design, manufacturing, control, product quality and diagnostic equipment, and other aspects, such as blast furnace control system, electric furnace and continuous casting plant, steel rolling system , steelmaking - Casting integrated scheduling system - rolling, cold rolling, etc..
2.2 Distributed Control System (DCS)
Distributed control system uses a central command for the control of a number of Taiwan-site monitoring and intelligent computer control unit. Distributed control systems can be two, three or more levels. Using computers to concentrate on the production process monitoring, operation, management and decentralized control. With monitoring and control technologies, and the functions of distributed control system more and more. Not only can be achieved control of the production process, but also can be achieved online optimization, the production process real-time scheduling, production planning statistical management functions, as a measurement, control, integration of the integrated system. DCS control functions with diverse features and easy operation, the system can be extended, easy maintenance and high reliability characteristics. DCS is decentralized and centralized control monitoring, fault-minor, and the system has the chain protection features, the use of manual control system failure operational measures, the system is highly reliable. Distributed control system and centralized control system compared to their more functional, with a higher level of security. Is the large-scale integration of mechanical and electrical systems main trend.
2.3 Open Control System (OCS)
Open Control System (Open Control System) is the development of computer technology led by the new structure concept. "Open" means a standard for the exchange of information in order consensus and support this standard design systems, different manufacturers products can be compatible and interoperable, and the sharing of resources. Industrial control systems through open communication network so that all control equipment, management, computer interconnections, to achieve control and management, administration, integrated decision-making, through fieldbus to the scene and control room instrumentation control equipment interconnected to achieve integrated measurement and control of.
2.4 Computer Integrated Manufacturing System (CIMS)
CIMS is the iron and steel enterprises will be and the production and operation, production management and process control connecting to achieve from raw materials into the plant, production and processing of shipments to the entire production process and the overall integration process control. Currently iron and steel enterprises have basically achieved process automation, but this kind of "automated island" of single automation lack of information resources and the sharing of the unified management of the production process, can hardly meet the requirements of the iron and steel production. Future competition iron and steel enterprises is the focus of many varieties, small batch production, cheap and of good quality, timely delivery of goods. In order to improve productivity, saving energy, reducing staff and the existing inventory, accelerate cash flow, production, operation and management of the overall optimization, the key is to strengthen the management, access to the benefits of raising the competitiveness of businesses. The United States, Japan and some other large-scale iron and steel enterprises in the 1980s has been widely realization of CIMS.
2.5 Fieldbus Technology (FBT)
Fieldbus Technology (Fied Bus Technology) is the connection settings in the field of instrumentation installed in the control room and control devices for digital, bi-directional, multi-station communication link. Fieldbus technology used to replace the existing signal transmission technology (such as 4 to 20 mA, DC DC transmission), it will enable more information in the field of Intelligent Instrumentation devices and higher-level control system in the joint between the communications media on the two-way transmission. Fieldbus connection can be through save 66% or more on-site signal connecting wires. Fieldbus lead to the introduction of the reform and the new generation of DCS around open fieldbus automation system of instruments, such as intelligent transmitter, intelligent, fieldbus detection instruments, fieldbus of PLC (Programmable Logic Controller) local control stations and field development.
2.6 AC drive technology
Transmission technology in the iron and steel industry plays a crucial role. With power technology and the development of microelectronics technology, the development of AC variable speed very quickly. The AC drive to the advantages of electric drive technology in the near future from AC drive completely replace DC transmission, the development of digital technology, complex vector control technologies to achieve practical, AC variable speed system speed and performance has reached more than DC converter level. Now whether small or large-capacity electrical motor capacity synchronous motor can be used to achieve reversible induction motor or smoothing governor. AC drive system in the production of steel rolling emerged as a welcome users, applications continues to expand.
6
畢業(yè)設(shè)計（論文）任務(wù)書
機械設(shè)計制造及其自動化專業(yè)
1102班
學(xué)生：齊旭
畢業(yè)設(shè)計（論文）題目：
機床主軸箱結(jié)構(gòu)設(shè)計1
畢業(yè)設(shè)計（論文）內(nèi)容：
1.設(shè)計說明書一份
2.CAD圖紙一套（包括總裝圖、零件圖 ）
3.文獻(xiàn)綜述（不少于3000字）
畢業(yè)設(shè)計（論文）專題部分：
機床主軸箱結(jié)構(gòu)
起止時間： 2015年3月6日至 2015年6月5日
指導(dǎo)教師： 簽字 2015年 3 月 6 日
沈陽化工大學(xué)科亞學(xué)院畢業(yè)論文文獻(xiàn)綜述
機床主軸箱結(jié)構(gòu)設(shè)計3文獻(xiàn)綜述
姓名:程學(xué)博 班級:機制1101班 指導(dǎo)教師:趙艷春
引言：
金屬切削機床是用切削的方法使得金屬毛坯加工成機器零件的機器，它是制作機器的機器，所以又稱為“工作母機”或“工具機”，習(xí)慣上叫做機床。
在新中國成立以后建立起來的機床工業(yè)。在半封建半殖民地的舊中國，根本上就沒有機床制造工業(yè)。一直到解放不久，全國只有十分少數(shù)幾個機械修配廠生產(chǎn)結(jié)構(gòu)簡單的少量機床。1949年機床年產(chǎn)量僅僅1500多臺。在解放后的幾十年時間里頭，我國的機床工業(yè)獲得高速發(fā)展。眼前我國已經(jīng)是布局十分合理，比較完善的機床工業(yè)體系。但是，我國的機床工業(yè)與世界先進(jìn)水平還是有非常較大的差距。所以，我國的機床工業(yè)面臨著光榮而艱巨的任務(wù)，必須不斷學(xué)習(xí)發(fā)展并且引進(jìn)國外的先進(jìn)科學(xué)技術(shù)，大力發(fā)揚科學(xué)研究，以便早日趕上世界先進(jìn)步伐。
機床可進(jìn)行各種車削工作，并可加工公制、英制、模數(shù)和徑節(jié)螺紋。
主軸三支撐均采用滾動軸承；進(jìn)給系統(tǒng)用雙軸滑移共用齒輪機構(gòu)；縱向與橫向進(jìn)給由十字手柄操縱，并附有快速電機。該機床剛性好、功率大、操作方便。
機床是將金屬毛坯加工成機器零件的機器，它是制造機器的機器，所以又稱為工作母機或工具機，習(xí)慣上簡稱機床?，F(xiàn)代機械制造中加工機械零件的方法很多：除切削加工外，還有鑄造、鍛造、焊接、沖壓、擠壓等，但凡屬精度要求較高和表面粗糙度要求較細(xì)的零件，一般都需在機床上用切削的方法進(jìn)行最終加工。在一般的機器制造中，機
床所擔(dān)負(fù)的加工工作量占機器總制造工作量的 40%-60%， 機床在國民經(jīng)濟現(xiàn)代化的建設(shè)中起著重大作用。
自從 20 世紀(jì)中葉以來，全球加工技術(shù)及其裝備在制造過程中占有重要地位:制造裝備中 80%以上零件需進(jìn)行加工,而且加工過程周期長,約占新產(chǎn)品開發(fā)周期 30～40%,占批量生產(chǎn)產(chǎn)品工時40～50%, 加工費用高,全世界約1億噸鋼和非鐵材料變成切屑,切削加工
的耗費每年在 2500 億美元以上。因此機床工業(yè)是備工業(yè)的基礎(chǔ),世界發(fā)達(dá)國家對其發(fā)展非常重視,機床產(chǎn)值持續(xù)增長我國機床產(chǎn)量和消費量呈快速發(fā)展態(tài)勢。近年來數(shù)控機床無論從產(chǎn)量、消費量還是進(jìn)口量上都加快了增長速度,但進(jìn)口量增長率始終大于產(chǎn)量增長率,國外數(shù)控產(chǎn)品始終對國產(chǎn)數(shù)控機床保持著壓力。雖然增長率差額
由 3.3%減小到了 0.9%,但簡單的經(jīng)濟型數(shù)控機床占到近 70%,高中檔數(shù)控機床幾乎全部依賴進(jìn)口, 結(jié)構(gòu)矛盾依然突出。
本設(shè)計主要針對機床的主軸箱進(jìn)行設(shè)計，設(shè)計的內(nèi)容主要有機床主要參數(shù)的確定，傳動方案和傳動系統(tǒng)圖的擬定，對主要零件 進(jìn)行了計算和驗算，利用三維畫圖軟件進(jìn)行了零件的設(shè)計和處理。機床主軸箱是機床中重要的傳動部件。其將機床電動機和機床主軸聯(lián)結(jié)起來，將動力和扭矩由電機傳遞到主軸，從而使主軸轉(zhuǎn)動以加工工件。其主要作用是通過變速裝置調(diào)節(jié)主軸轉(zhuǎn)速和扭矩，從而使電機運行在最佳
正文：
車床主軸是車床中應(yīng)用最廣泛的一種，約占車床類總數(shù)的65%，因其主軸以水平方式放置故稱為臥式車床。普通車床的主軸箱又稱床頭箱，它的主要任務(wù)是將主電機傳來的旋轉(zhuǎn)運動經(jīng)過一系列的變速機構(gòu)使主軸得到所需的正反兩種轉(zhuǎn)向的不同轉(zhuǎn)速，同時主軸箱分出部分動力將運動傳給進(jìn)給箱。主軸箱中等主軸是車床的關(guān)鍵零件。主軸在軸承上運轉(zhuǎn)的平穩(wěn)性直接影響工件的加工質(zhì)量，一旦主軸的旋轉(zhuǎn)精。
本文對機床主軸箱進(jìn)行了設(shè)計，主軸箱是機床的動力源將動力和運動傳遞給機床主軸的基本環(huán)節(jié)，其機構(gòu)復(fù)雜而巧妙，要實現(xiàn)其全部功能在軟件中的模擬仿真工作量非常大。這次設(shè)計的效果沒有預(yù)計的完美，有一些硬件方面的原因，在模擬仿真的時候，由于計算機的配置不能達(dá)到所需要求，致使運行速度非常慢，不但時間上拖了下來，而且所模擬的效果很不理想。我接受的設(shè)計任務(wù)是對CA6140車床的主軸箱進(jìn)行設(shè)計。主軸箱的結(jié)構(gòu)繁多，考慮到實際硬件設(shè)備的承受能力，在進(jìn)行三維造型的時候在不影響模擬仿真的情況下，我省去了很多細(xì)部結(jié)構(gòu)。
1．溜板部分的機動進(jìn)給操作型車床的縱、橫向機動進(jìn)給(feed)和快速移動采用單手柄操縱。自動進(jìn)給手柄在 溜板箱右側(cè)，可沿十字槽縱、橫扳動，手柄扳動方向與刀架運動方向一致。手柄在十字槽中 央位置時，停止進(jìn)給運動。在自動進(jìn)給手柄頂部有一快進(jìn)按鈕，按下此鈕，快移電動機工作， 床鞍或中滑板按手柄扳動方向作縱向或橫向快速移動；松開按鈕，快移電動機停止轉(zhuǎn)動．快 速移動中止。溜板箱正面右側(cè)有一開合螺母操作手柄，用于控制溜板箱與絲杠之間的運動聯(lián) 系。車削非螺紋表面時，開合螺母手柄位于上方；車削螺紋時，壓下開合螺母手柄，使開合 螺母閉合并與絲杠嚙合， 將絲杠的運動傳遞給溜板箱， 使溜板箱、 床鞍按預(yù)定的螺距(或?qū)С? 作縱向進(jìn)給。車完螺紋應(yīng)立即將開臺螺母手柄扳回原位。 (1)用自動進(jìn)給手柄作床鞍的縱向和中滑板的橫向進(jìn)給的機動進(jìn)給練習(xí)。 (2)用手動進(jìn)給手柄和手柄頂部的快進(jìn)按鈕作縱向、橫向的快速移動操作。 (3)操作進(jìn)給箱上的絲杠、光杠變換手柄，使絲杠回轉(zhuǎn)，將溜板箱向右移動足夠遠(yuǎn)的距離， 扳下開臺螺母，觀察床鞍是否按選定螺距作縱向進(jìn)給。扳下和抬起開合螺母的操作應(yīng)果斷有 力，練習(xí)中體會手的感覺。 (4)左手操作中滑板手柄， 右手操作開合螺母． 兩手配合動作練習(xí)每次車完螺紋時的橫向退 刀。 （5） 操作車床主軸變速手柄得到各擋轉(zhuǎn)速按車床主軸轉(zhuǎn)速銘牌上的主軸轉(zhuǎn)速標(biāo)記， 轉(zhuǎn)動車床 主軸變速手柄，調(diào)整主軸轉(zhuǎn)速分別為 16 r／皿 n、450 r／mln 和 1 400‖…，確認(rèn)后啟動車 床并觀察。
2．操作車床進(jìn)給量手柄得到各擋進(jìn)給量。 按車床進(jìn)給量銘牌確定選擇縱向進(jìn)給量為 0 46 mm／r、橫向進(jìn)給量為 0 20 mm／r 時手輪 和手柄的位置，并進(jìn)行調(diào)整。按前面步驟調(diào)整車床進(jìn)給量手輪和手柄，使車床得到各擋進(jìn)給量。(1)沿床身導(dǎo)軌手動縱向移動尾座至合適位置， 逆時針方向扳動尾座緊固手柄． 將尾座固定。 注意移動尾座時用力不要過大。 (2)逆時針方向轉(zhuǎn)動套筒鎖緊手柄(松開)，搖動手輪，使套筒作進(jìn)、退移動。
3．手動操作車床床鞍、中滑板、小滑板手柄 (1)搖動床鞍手柄，使床鞍向左或向右作縱向移動。手輪軸 t 的刻度盤圓周等分．300 格， 手輪每轉(zhuǎn)動一格，床鞍縱向移動 1 mm。順時針方向轉(zhuǎn)動手柄時，床鞍向右運動；逆時針方向 轉(zhuǎn)動手柄時，床鞍向左運動。 (2)用左手、 右手分別按順時針和逆時針方向搖動中滑板手柄， 使中滑板作橫向進(jìn)給和退出 移動。中滑板絲杠上的刻度盤圓周等分 100 格，手柄每轉(zhuǎn)過 1 格，中滑板橫向移動 o．05 mm。 順時針方向轉(zhuǎn)動手柄時，中滑板向遠(yuǎn)離操作者方向運動(即橫向進(jìn)刀)；逆時針方向轉(zhuǎn)動手柄 時，中滑板向靠近操作者方向運動(即橫向退刀)。 (3)用雙手交替搖動小滑板手柄，使小滑板作縱向短距離的左、右移動。小滑板絲杠上的刻 度盤圓周等分 100 格，手柄每轉(zhuǎn)過 1 格，小滑板縱向移動 0 05 mm。小滑板手柄順時針方向 轉(zhuǎn)動時，小滑板向左運動；小滑板手柄逆時針方向轉(zhuǎn)動時，小滑板向右運動。 (4)左手搖動車床床鞍手柄， 右手同時搖動中滑板手柄， 橫向快速趨近和快速退離工件。 縱、 (5)左手搖動中滑板手柄，右手同時搖動小滑板手柄。
4．啟動車床 (1)檢查車床各變速手柄是否處于空擋位置． 離合器(clutch)是否處于正確位置， 操縱桿是 否處于停止?fàn)顟B(tài)，確認(rèn)無誤后，合上車床電源總開關(guān)。 (2)按下床鞍上的綠色啟動按鈕，電動機(elettdc molor)啟動。 (3)向上提起溜板箱右側(cè)的操縱桿手柄，主軸正轉(zhuǎn)；操縱桿手柄回到中間位置，主軸停止轉(zhuǎn) 動；操縱桿手
CA6140機床可進(jìn)行各種車削工作，并可加工公制、英制、模數(shù)和徑節(jié)螺紋。
主軸三支撐均采用滾動軸承；進(jìn)給系統(tǒng)用雙軸滑移共用齒輪機構(gòu)；縱向與橫向進(jìn)給由十字手柄操縱，并附有快速電機。該機床剛性好、功率大、操作方便。
機床主軸箱是一個比較復(fù)雜的傳動部件。表達(dá)主軸箱中各傳動件的結(jié)構(gòu)和裝配關(guān)系。
總結(jié)：
傳動方案和傳動系統(tǒng)圖的擬定
主運動傳動鏈
1.傳動路線
主運動傳動鏈的兩末端件是主電動機和主軸。運動由電動機（7.5Kw，1450r/min）經(jīng)V帶輪傳動副130mm/230mm傳至主軸箱中的軸I。在軸I上裝有雙向多片摩擦理合器，使主軸正轉(zhuǎn)、反轉(zhuǎn)、或停止。它就是主換向機構(gòu)。當(dāng)壓緊離合器左部的摩擦片時，軸I的運動經(jīng)齒輪副或傳給軸，使軸獲得兩種轉(zhuǎn)速。壓緊右部摩擦片時，經(jīng)齒輪50（齒數(shù)）、軸V上的空套齒輪34傳給軸上的固定齒輪30。這時軸I至軸間多了一個中間齒輪34，故軸的轉(zhuǎn)向與經(jīng)左部傳動時相反。反轉(zhuǎn)轉(zhuǎn)速只有一種。當(dāng)離合器處于中間位置時，左、右摩擦片都沒有被壓緊。軸I的運動不能傳至軸，主軸停轉(zhuǎn)。
軸的運動可通過軸、間三對齒輪的任一對傳至軸，故軸正轉(zhuǎn)共有23=6種轉(zhuǎn)速。
運動由軸傳往主軸有兩條線路：
（1）高速傳動路線 主軸上的滑移齒輪50移至左端，使之與軸上右端的齒輪63嚙合。運動由軸經(jīng)齒輪副直接傳給主軸，得到450～1400r/min的6種高轉(zhuǎn)速。
（2）低速傳動路線 主軸上的滑移齒輪50移至右端，使主軸上的齒式離合器嚙合。軸的運動經(jīng)齒輪副或 傳給軸，又經(jīng)齒輪副或傳給軸、再經(jīng)齒輪副和齒式離合器傳至主軸，使主軸獲得10～500r/min的低轉(zhuǎn)速。
圖1 轉(zhuǎn)速圖
由上面的傳動路線分析，現(xiàn)確定以下數(shù)據(jù)：
（1）確定極限轉(zhuǎn)速
主軸最低轉(zhuǎn)速為10r/min,最高轉(zhuǎn)速為1400r/min，轉(zhuǎn)速調(diào)整范圍為
==14
（2）確定公比
選定主軸轉(zhuǎn)速數(shù)列的公比為φ＝1.12
（3）求出主軸轉(zhuǎn)速級數(shù)Z
Z=lgRn/lgφ+1= lg14/lg1.12+1=24
（4）確定結(jié)構(gòu)網(wǎng)或結(jié)構(gòu)式
24=2×3×2×2
（5）繪制轉(zhuǎn)速圖，
選定電動機：
一般金屬切削機床的驅(qū)動，如無特殊性能要求，多采用Y系列封閉自扇冷式鼠籠型三相異步電動機。Y系列電動機高效、節(jié)能、起動轉(zhuǎn)矩大、噪聲低、振動小、運行安全可靠。根據(jù)機床所需功率選擇Y160M-4，其同步轉(zhuǎn)速為1500r/min。
分配總降速傳動比：
總降速傳動比為uII=nmin/nd=10/1500≈6.67×10－3,nmin為主軸最低轉(zhuǎn)速，考慮是否需要增加定比傳動副，以使轉(zhuǎn)速數(shù)列符合標(biāo)準(zhǔn)或有利于減少齒輪和及徑向與軸向尺寸，并分擔(dān)總降速傳動比。然后，將總降速傳動比按“先緩后急”的遞減原則分配給串聯(lián)的各變速組中的最小傳動比。
確定傳動軸的軸數(shù)：
傳動軸數(shù)＝變速組數(shù)+定比傳動副數(shù)+1=6
繪制轉(zhuǎn)速圖：先按傳動軸數(shù)及主軸轉(zhuǎn)速級數(shù)格距l(xiāng)gφ畫出網(wǎng)格，用以繪制轉(zhuǎn)速圖。在轉(zhuǎn)速圖上，先分配從電動機轉(zhuǎn)速到主軸最低轉(zhuǎn)速的總降速比，在串聯(lián)的雙軸傳動間畫上u(k→k+1)min.再按結(jié)構(gòu)式的級比分配規(guī)律畫上各變速組的傳動比射線，從而確定了各傳動副的傳動比。
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