資源目錄里展示的全都有，所見即所得。下載后全都有,請放心下載。原稿可自行編輯修改=【QQ：401339828 或11970985 有疑問可加】 河南理工大學萬方科技學院 本科畢業(yè)設計（論文）中期檢查表 指導教師： 冷軍發(fā) 職稱： 副教授 所在院（系）： 機械與動力工程系 教研室（研究室）： 機設 題 目 單梁橋式起重機設計 學生姓名 瞿佳佳 專業(yè)班級 08機設2班 學號 0828070125 一、選題質量：（主要從以下四個方面填寫：1、選題是否符合專業(yè)培養(yǎng)目標，能否體現(xiàn)綜合訓練要求；2、題目難易程度；3、題目工作量；4、題目與生產、科研、經濟、社會、文化及實驗室建設等實際的結合程度） 1、本題目符合機械設計專業(yè)的培養(yǎng)目標，能夠充分鍛煉和培養(yǎng)分析問題和實際操作能力，能夠體現(xiàn)綜合訓練的要求； 2、本題目難易適中，符合本科畢業(yè)設計要求； 3、本題目工作量適中，能在規(guī)定的時間內完成； 4、所選題目單梁橋式起重機總體的設計與實際貼合比較緊密，在實際的應用中比較廣泛。在設計過程中，對機器的零件的設計和計算對我來說是以往所學知識的總結和應用，所以能夠滿足綜合訓練的要求 二、開題報告完成情況： 根據(jù)自己在各方面資料的收集和整理，通過對可行性的分析，結合老師給的題目的選擇，我完成了這次設計的選題。在選題結束之后，通過自己認真查閱相關的資料，最后結合本身的實際情況和設計的時間任務完成了開題報告。 三、階段性成果： 1、通過對單梁橋式起重機的了解，再加上老師對我們的講解，算是對單梁橋式起重機有了一個大概的了解。前期階段主要是對有關于單梁橋式起重機的各方面的文獻和資料進行搜集，為設計以后的設計做了必要的準備。 2、中期階段主要是依據(jù)參考資料，從上面找到一些關于關于單梁橋式起重機的信息，首先對其零部件有了大致的了解，其次是已有了大概的設計方法，并開始了一些基本的結構設計。 3、正在進行CAD畫圖和設計說明書。 四、存在主要問題： 由于這是我第一次單獨進行單梁橋式起重機總體設計，所以剛開始進展的并不是很順利。而我對這方面的知識掌握比較少，所以需要在圖書館和網上查找更多的相關資料，對有關起重機的知識進行更深入的了解。不過我堅信，只要自己努力和在指導老師的指引下，我能把各方面的問題逐個擊破，最終順利完成畢業(yè)設計。 五、指導教師對學生在畢業(yè)實習中，勞動、學習紀律及畢業(yè)設計（論文）進展等方面的評語 指導教師： （簽名） 年 月 日 2 河南理工大學萬方科技學院 本科畢業(yè)設計（論文）開題報告 題目名稱 單梁橋式起重機設計 學生姓名 專業(yè)班級 學號 一、 選題的目的和意義： 目的：隨著社會經濟和科學技術的日新月異，起重機的應用領域不斷加寬，起重機的種類層出不窮。制造廠和裝卸作業(yè)廠所逐漸轉向室內，使橋式起重機占了主導地位。最典型簡便并且實用性強的要數(shù)電動單梁橋式起重機。它對于發(fā)展國民經濟，改善人們的事物、文化生活的需要都起著重要的作用。一些企業(yè)由于沒有起重機械，不僅工作效率低，勞動強度大，甚至難以工作。 意義：由于單梁橋式起重機主要用于室內移動噸位數(shù)相對較小的重物，它的制造簡單，制造成本相對較低，主要由機械部分和電氣部分組成，其中機械部分主要由一個單主梁和兩個端梁組成，電氣部分主要是外購件電動葫蘆。比起其他起重機花費的成本要小很多，但是它的功能絕不亞于其他起重機。當室內跨度較大，而移動的重物相對較小，移動速度需求較快時就必須優(yōu)先考慮單梁橋式起重機。但是由于各戶需求的跨度和最大起重量等條件個不相同，為了既滿足客戶需求又能使起重機公司獲利，實現(xiàn)雙贏，所以有必要對單梁橋式起重機不斷的進行探索和改進。通過畢業(yè)設計，能從各個方面綜合考查大學四年所學過的專業(yè)知識。能代表機械選型設計的一般過程?？梢蚤_闊視野，提高我們的解決問題和分析問題的能力，以及提高綜合運用理論知識的能力；通過此次畢業(yè)設計，更能激發(fā)學習和探索問題的興趣，為未來的學習和工作打下良好的基礎；通過此次的畢業(yè)設計，我們可以把學過的課本知識在設計工作中綜合地加以應用，使這些知識得到鞏固和發(fā)展；通過畢業(yè)設計，能夠初步培養(yǎng)我們對機械設計的獨立工作能力，為以后進行設計工作打下良好的基礎；通過畢業(yè)設計，我們能夠熟練應用有關參考資料、計算圖表、手冊；熟悉有關的國家標準和部頒標準，以完成一個工程技術人員在機械設計方面所必須具備的基本技能訓練。 二、 國內外研究綜述： 單梁橋式起重機橋架的主梁多采用工字型鋼或鋼型于鋼板的組合截面。起重小車常為手拉葫蘆，電動葫蘆或用葫蘆座位起升機構部件裝配而成。按橋架支撐式和懸掛式兩種，前者橋架沿車梁上的起重機軌道運行；后者的橋架沿懸掛在廠房屋架下的起重機軌道運行。 隨著我國基礎設施建設的刺激發(fā)展和城市化建設的推進，起重機械的市場需求不斷升溫，應用領域不斷擴大。近年來我國的起重機遇發(fā)展良機，市場空間巨大，國內眾多企業(yè)為了爭奪國內起重機械市場，不斷改進，升級，研發(fā)出性價比較高，適應國情的產品，加上維修成本低，速度快等優(yōu)點，國產起重機械逐漸受到廣大用戶的認可。 由于工業(yè)生產規(guī)模的不斷擴大，生產效率日益提高，以及產品生產過程中物料裝卸搬運費用。相較于國外研究橋式起重機主梁金屬結構的健康 和疲勞狀況, 國對于橋式起重機的安全檢測主要體 現(xiàn)在: 通過使用不同的檢測方法, 完成對起重機主梁一 系列安全參數(shù)的逐項檢測。 橋式起重機安全參數(shù)主要 為: 主梁上拱度、 上翹 度、 撓度、 下 靜剛 度 等。早期 主要 采 用拉 鋼 絲測 量 法 、 水準儀法 等; 目前主要采用光學儀器測量法, 如經緯儀法、 全站儀法、 激光 準直儀法及激光 測距儀法。 國外研究狀況 . 目前, 國外對橋式起重機的安全檢測主要著眼于 對金屬結構 ( 主梁和端梁等組成橋架的主要構件 ) 健 康狀況和疲勞狀況的監(jiān)測。 M a和 Asund i 率先采用光纖偏振傳感 ( FOPS) 和 光纖彎曲傳感器 ( FOCS) 對帶不同裂紋的金屬鋁梁進 行了整體健康監(jiān)測。試驗中, 將傳感器粘貼在鋁梁底 面中心。試件的剛度下降和含裂紋梁的損傷程度分別 采用靜態(tài)損傷因子 ( SDF )和動態(tài)損傷因子 ( DDF ) 來描 述。實驗結論顯示, 兩類傳感器都可以作為結構整體 健康監(jiān)測的定量監(jiān)測元件。 H a le 采用光纖傳 感器進 行了對金 屬結構疲 勞 裂紋監(jiān)測的 研究工 作。試 驗中, 其將 光纖用 高模 量 粘接劑粘在 結構表 面上, 然后 用電子 紅外 衰減檢 出 裝置檢測光 的衰減。如果 用鎢燈 代替 紅外光 源, 則 可由 纖 維 斷 裂 逸 出 的 可 見 光 清 楚 地 顯 示 出 裂 紋 位置。 L ee 等人也采用基于強度的光纖傳感器 ( I FS) O 研究了由循環(huán)載荷引起的低碳鋼疲勞裂紋擴展的監(jiān)測 問題。試件裂紋的起始長度為 1 mm, 其采用 MTS 液 壓試驗機對試件施加頻率為 4 H z的正弦波形循環(huán)載 荷。 IOFS將采集的數(shù)據(jù)經過 A /D 轉換后傳送給計算 機, 計算機再將分析結果實時地顯示到監(jiān)視器上, 從而 實現(xiàn)鋼板疲勞裂紋擴展的實時監(jiān)測。 [ 4] Ich in ose 等人也通過與此類似的方法, 采用光纖 傳感器研究了由循環(huán)載荷引起的鋼結構破壞區(qū)域的監(jiān) 測問題。 綜上所述, 國外使用光纖傳感器等智能結構對起重 機金屬結構進行健康監(jiān)測, 取得了一些階段性研究成 果。但這些基礎性研究中還有許多問題亟待解決, 也還 沒有設計出成型的儀器, 推廣起來還需一定的時間 。 三、 畢業(yè)設計（論文）所用的主要技術與方法： 主要技術：運用了理論力學和材料力學中的有關力的分析和計算，例如剛度，強度，可行性，載荷的分析，扭轉力矩等的分析與計算。采用機械圖形設計軟件AutoCAD2007 進行繪圖，借助相關資料，結合大學所學知識來完成畢業(yè)設計。 方法：首先對產品進行總體設計，確定系統(tǒng)的要求，選擇工作原理；其次，計算和確定主要尺寸，繪制部件裝配圖和總圖；最后，繪制全部零件工作圖，編寫說明書。如果設計的過程中如果發(fā)現(xiàn)遺漏我還會及時補充上去。 四、 主要參考文獻與資料獲得情況： 《起重機國家標準》 《葫蘆式起重機》 《起重機設計制造新工藝》 《機械設計手冊》 《橋式起重機設計計算》 《起重機設計手冊》 以上資料基本都具備了！ 五、 畢業(yè)設計（論文）進度安排（按周說明） 1）6～8周：畢業(yè)實習、期間還收集部分資料。 2）9～10周：寫開題報告，進行畢業(yè)設計的基本計算。 3）11～13周：排版整理畢業(yè)設計說明書和用CAD軟件進行繪圖。 4）14～15周：對畢業(yè)設計進行修改、完善，準備答辯。 六、 指導教師審批意見： 指導教師： （簽名） 年 月 日 河南理工大學萬方科技學院本科畢業(yè)論文翻譯 The history of crane A significant word for the decade as far as the crane industry was concerned, was railways, as cranes for this industry were still very important. On 7 September 1949, for example, the Deutsche Bundesbahn (Federal German Railway) was founded. It needed high-capacity lifting devices that could be taken to the job site as part of a train. Four steam-driven cranes, each of which could lift 57 tonnes, were ordered from Ardelt. In 1950 followed a special type of crane with a boom designed for working below overhead wires. The cranes featured a counterweight attachment system which was connected to the lifting gean This innovative design did not prove successful, but was replaced in 1955/56 by a similar hydraulic mechanism. Also in Germany, MAN had been actively building not just harbour, dockyard and travelling cranes, but also diesel-powered slewing cranes with pneumatic steering. These had been built since 1946 (picture 204), were driven by a 70 kilowatt six cylinder truck engine and could lift 6 tonnes at 7 metres radius and weighed 48 tonnes. A small concession to safety was also introduced as the company brochure tells us: "A load moment safety device, built in to the boom mechanism and thus linked to the lifting mechanism, cuts in if the permitted load moment is exceeded". The brochure writer realised the significance of the fact that the device acted when the load was exceeded and not "... as was the case ten years ago, at the point when the superstructure has already tipped over!”These load moment safety devices,although a small part of the overall crane,were very important in the development ot the cranes. Bridge crane Bridge crane is horizontal plane in workshop, warehouse and yard over rigger materials of lifting equipment. Because of its ends located in tall cement posts or metal stents, shape like bridge. Bridge crane along the bridge on both sides laying in elevated the orbit of longitudinal operation, can make full use of the space below girder hoisting materials, does not suffer ground equipment obstacles. It is to use the widest range, the largest number of a kind of hoisting machinery. Bridge crane is the modern industrial production and lifting transportation in realizing realize mechanization, automation production process to important tools and equipment. So bridge crane in interior industrial and mining enterprises, steel chemical industry, railway transportation, ports and logistics departments and establishments are widely used. Bridge crane can be divided into ordinary bridge crane, simple girder crane and metallurgical special bridge crane 3 kinds. Ordinary bridge crane is general by lifting trolley and bridge operation organization, bridge metal structure group into. Lifting car again by lifting mechanism, trolley mechanism and the car frame of three parts. Lifting mechanism including motor, brakes, reducer, drum and pulleys. Driving speed reducer, electromotor through reel rotation of wire rope around the drum drum down, or from lifting weights with. Car frame is a torre and installation of hoisting mechanism and the car mechanism, etc. Parts of the frame, usually for welding structure. Crane operation organization drive mode can be divided into two kinds: one kind is concentrated drive, which is a motor driving long shaft drive on both sides of the active wheels, Another kind is respectively driven, namely on both sides of the active wheel each with a motor drives. Medium and small bridge crane is increasingly used brakes, reducer and electric generator synthetic one of three-in-one drive mode, a big weight of ordinary bridge crane for ease of installation and adjustment, device drivers often adopt universal shaft coupling. Crane operation organization generally in four active and driven wheels, if lifting weight is very big, commonly used to increase the wheel to reduce the pulley. When more than four wheels when, must use hinged equilibrium frame device to make the crane load evenly distributed in each wheel. Bridge of metal structure composed by main girder and girders, divided into the single girder frame and main double girder frame two kinds. Single main girder bridge girder and frame is located in single span on both sides of the girders composition, double girder frame girder by two root and girders composition. Girder and girders rigid connection, girders, supporting both ends with wheels in elevated bridge to run on. The main welding have orbit, for lifting car running. Bridge girder structure type more comparatively typical have box structure, four truss structure and open-web truss structure. Box structure can divide again on track box shuang liang, slant rail box shuang liang, slant rail box single girder to wait for a few kinds. Track box shuang liang is widespread adoption of a basic form the girder, consists of flange plate and bilateral vertical webs composition, car rail decorate in the center of the flange plate online, its simple structure, easy fabrication, suitable for mass production, but self-respect greatly. Partial rail box double beam and partial rail box single main section is by the upper and lower flange plate and the different thickness of the Lord vice webs composition, car rail decorate in the main webs, short circuits inside above stiffening plate can save, including partial rail box girder is composed of a single root box girder wide flange instead of two root girder, respect smaller, but manufacturing complex. Four truss structure featured by four plane truss by combined into closing in on the spatial structure, the level of general shop to have walked surface truss bedplate, light dead weight, stiffness big, but compared with other structure size, shape, manufacturing is relatively complex, fatigue strength low, has less production. Open-web truss structure similar to slant box girder by rail, four plates form a closed structure, in addition to the main webs for real abdomen i-section beam outside, the rest 3-piece plate according to the design demand cutting into many window, forming a without rods of open-web truss, in the upper and lower horizontal truss surface covered go bedplate, crane operation organization and electrical equipment installed in bridge internal, self-respect lighter, whole stiffness big in China is that more widespread adoption of a type. Ordinary bridge crane mainly adopts electric drive, it is to be in commonly driver indoor manipulation, also have long-distance bridge crane ，Control. Lifting weight can reach 500 tons, span of 60 meters. payments and plate steel composed of simple beam, with the hand type hoists or electric hoist match on simple car as lifting car, the car is in commonly strander beam under operation on the flange. Bridge along on a high orbits, also can along the suspensory on elevated the following orbits, this kind of crane beam cranes called suspension. Metallurgy special bridge crane in steel production process can participate in particular process operation, its basic structure and ordinary bridge crane is similar, but in lifting cars also has a special working organs or device. This kind of crane characteristics of the work is used frequently, conditions and job level is higher. Basically has five types. Bridge crane safety check to ensure the safe operation of the bridge cranes, in crane operation period to some general safety inspections and inspection items and points as follows: (1) the hoisting height peneumatied device, travel limit switches and all the interlock device performance is bridge crane Often, safe and reliable. (2) the main parts meet safety requirements: less than the original size increase openings less than 10%, 15% torsional deformation, Board hook bushing wear less than the original size, 50% of the board hook mandrels wear less than 5%, no spalling, burr, weld repairs. Hook rack and pulley without obvious flaw. Wire rope surface wire wear and corrosion is less than 40% of wire diameter, broken wires in a twined within less than the total silk from the number of 10%, no bufo, without obvious attenuate, without mandrel department of emergence, blind Angle twisting, extrusion, annealing, burning phenomenon. At the end of the wire rope connection and fixed clip next, clips, -200 block connect intact, without loosing, linking piece not less than 2, clip next amount not less than 3. S no crack, links, fixed without shake, A hollow wear less than 20% of the original wall thickness, Safety coil not less than 2 laps, drum and wire rope diameter ratio meets the requirement. Balance wheel fixed intact, the wire rope should comply with the requirements. Brake flawless, without loose, no serious wear and brake clearance sides equal size, have enough braking force, brake with less than 50% of the original thickness wear. Through the bridge crane safety routine inspection, to prevent accidents and reduce equipment accidents and improve equipment availability, reducing maintenance cost etc are plays a remarkable role. Welding equipment and welding machinery roller Welding equipment and welding machinery roller-welding is a manufacturing technology, it is to adapt to the needs of industrial development. modern industrial development as a basis for development, and direct services in the machinery manufacturing industry. Welding technology development and manufacturing industries closely linked to the needs of general industrial advanced countries, Steel output in general about the need for welding technology products can be formed, the laborers in the oil, mining metallurgy, metal structure, Lifting transport, surface transportation, aerospace, computer flu bridge construction machinery and equipment manufacturing sector, Welding has important and wide-ranging role. Many of the equipment of large-scale structure, almost all of welded structures. Now with the development of science and technology, the scale of production growing, welded structure is moving in super high-capacity high parameters in the direction of development, which is not only the need for welding production of higher quality and better performance of the welder, welding material and welding technology, but also to provide the superior performance of the welding process equipment, welding production mechanization and automation, reducing anthropogenic factors, guarantee the quality and stability of welding, Welder improve working conditions, increase productivity purposes. However welding production is integrated production and welding pieces of the manufacturing process, a welding process itself there's also a lot of co-ordination processes, and therefore welding production mechanization and automation, not only confined to the welding process itself, including the welding process, the ministry convergence of various processes of mechanization and automation, Only by achieving the various processes of mechanization and automation of welding production can be achieved comprehensive mechanization and automation. Welding machinery and equipment is divided into the following types : welding fixture, welding-machine and welding pieces of machinery and transport equipment other affiliation. From the use of scale, welding machinery and equipment is divided into two categories of general and special. General welding machinery and equipment strong common use of sexual Canton, the entire machinery products can adapt to changes in the structure of the repeated use. They can use combination can also mix in welding production line as a production welding components. Specialized welding machinery and equipment in order to meet but varieties, a large amount of specialized welding production needs of design and manufacturing. Such equipment specialized, high productivity, advanced control system, a good product mix to meet the welding process, Mass production requirements. Welding machinery and equipment for the production of welding the beneficial effect of the following aspects : 1) using welding fixture. Parts are positioning device positioning, not crossed, we can not accurately measure the location of assembly, thereby ensuring the accuracy of assembly, accelerated the progress of the assembly work. 2) As in the welding fixture can be forced to give advance or reinforce anti-distortion, they are able to control or eliminate welding deformation. 3) using welding fixture, due to the welding assembly to ensure the accuracy and control of welding deformation, Therefore, to enhance the exchange of welding performance and welding pieces of the tie hole, groove with mechanical elements to be reduced from the first welding processing into first after the welding process, thus avoiding the large welded structure welding process on behalf of difficulties, to shorten the production cycle of welding. 4) using welding machine building can be shortened assembly and welding process, welding pieces of anti-change time reduce auxiliary working hours, increased utilization of welding and welding productivity. 5) using welding machinery spaces will welding pieces in the most favorable position welding. This is conducive to operate, enabling welding quality assurance, but also intensify the welding process norms, full welding performance. 6) Use of chanting positioner to expand the scope of the welding welder. 7) using welding machinery and equipment, will enable the manual modification of machinery and the only person in control of the position, factors that reduce the quality of the welding impact, but also lowers the level of manipulating welder requirements. 8) Only with mutual welding machinery and equipment to be matched in difficult conditions, environmental hazards, not directly manipulated by artificial occasions welding operations. For example, in the heat, Sham Shui Po, a radioactive environment for the conduct of welding operations, need with the corresponding welding machinery and equipment interfaces can be achieved. 9) To Make welding process itself mechanization and automation, or welding production process to achieve comprehensive automation, require welding machinery and equipment support can be achieved. In short, welding machinery and equipment for welding production process enabling role is multifaceted. In a nutshell, is to ensure that the welding quality, and improve welding productivity, improve workers Zuye environment, mechanization and automation of welding production process four aspects. So in the welding shop or at the construction site. Welding machinery and equipment has become welding production process indispensable equipment, which was widely used. Welding is a roller-roller through the initiative and welding pieces of friction, lead welding pieces of rotating machinery modification. Welding roller stand for the main pieces of tube welding and welding assembly. If the right owners, the high roller follower appropriate adjustments will be able to conduct Cone, ranging from sub-diameter rotating assembly and welding. Some non-circular shape welding long pieces, if their card installed in a special card for the ring, Also available on the shelves of welding roller welded assembly work. Roller-welding to the structure and the breakdown is as follows : the first is the long axis of the wheel-F. Roller along with two parallel axes, and the driving device linked to a row to take the initiative wheel, another row of the roller follower. there are two rows of rollers are aware of, mainly for the slender-thin pieces of welding and welding of the group. Some long axis of its F - scroll wheel for a roller-long, has a diameter of 0.3-0.4m, a length of ~ 5m. Shell placed on the axial deformation not apply to thin, small-diameter, multi-cylinder welding pieces of the team up and girth welding. Some long axis of its F - scroll wheel for a long-roller, diameter and a length of ~ 5. Shell placed on deformation not apply to thin, small-diameter, multi-cylinder welding pieces of the team up and girth welding. F-long axis of the wheel are based on users welding pieces of the characteristics of its own design and manufacture, market for the selected few stereotypes products. The second category is modular roller stand, its active wheel racks, roller-follower. Hybrid wheel frame (that is, in a stent with an initiative on the wheel and a roller follower Block) is an independent, using welding pieces under the weight and length of arbitrary composition, its composition ratio is not only a more than one combination. Therefore, it is flexible, the applicability of welded pieces of a strong, which is the most widely used form of the structure. Domestic and foreign manufacturers have their own series of products supply market. If welding thickness and length of the smaller long welded pieces, it is appropriate several mixed-wheel combination, This direction along the length of the cylinder have the initiative wheel drive, welding pieces from slipping and distortions. If welding thickness larger, better rigid tube welding pieces, we would often take the initiative to use the wheel - and-roller follower of the portfolio, Even though the initiative is the roller-cylinder side-driven rotating welding pieces, but due to the welding pieces of rigid, and managed to maintain a uniform speed, not causing distortion. To diameter of the welding of different welding, the welding Roller roller-spacing should be able to adjust. Adjust two ways : one is self-tuning; A non-self-tuning of. Self-tuning based on the diameter of the welding automatically adjust the wheel spacing; Non-self-tuning the mobile scaffold on the wheel on the Block, to adjust the wheel spacing. Non-self-tuning of the roller frame is welded mobile scaffold on the wheel on the Block, to adjust the wheel spacing. The heavy roller stand, and use the shop lifting equipment moved roller Block Sub-conditioning. Roller-right light, the use of manual and electric screw-nut body to Block Mobile scroll continuously. In order to facilitate adjustment wheel the distance between planes to accommodate different length welding pieces of welding assembly, Some roller shelves are also installed mobile or non-motorized travel agencies, along the migration path to adjust the distance between each other. Welding roller-use DC motor-driven, pressure-relief governor. But for the assembly work roller frame is used AC motor-driven, constant speed operation. Recent years, with Crystal Gateway flow control inverter and improve the performance of lower prices, AC motor drive, VVVF welding roller frame is also increasing. MULTI-metal wheel with steel and ductile iron alloy production, the surface hardness of about 50 heat treatment HRC, roller diameter between 200-700mm. Foreign welding roller stand many varieties, than the entire series, facing an ~ 1500. apply welding pieces ~ 8m diameter of a standard modular roller frame (two active and two blocks roller follower rollers Block Portfolio) supply all series. Roller its multi-line speed in 6 ~ 90 m / h between non-adjustable level, there is some welding to prevent axial movement functions. China has many manufacturers to produce welding roller stand, the biggest loading capacity has reached 400 t, apply welding pieces of up to 6 m in diameter. Roller line speed over 60m in 6 ~ / h between variable speed. Preventing axial movement of the wheel-welding production already, but need to improve the quality of performance. 1997 China Statistical Yearbook welding, China has 23 auxiliary welding machine manufacturers of various types and specifications of welding roller stand, user needs, should first be selected. Selection, in addition to the wheel frame welding meet welding weight, tube diameter and welding speed requirements, should also enable the wheel-drive torque than welding pieces of