小型汽車液壓助力轉向系統(tǒng)設計【含10張CAD圖紙】【含CAD高清圖紙和說明書】
小型汽車液壓助力轉向系統(tǒng)設計【含10張CAD圖紙】【含CAD高清圖紙和說明書】,含10張CAD圖紙,含CAD高清圖紙和說明書,小型,汽車,液壓,助力,轉向,系統(tǒng),設計,10,cad,圖紙,高清,以及,說明書,仿單
中國地質大學長城學院本科畢業(yè)設計外文資料翻譯系 別: 工程技術系專 業(yè): 機械設計制造及其自動化姓 名: 學 號: 2015年 2 月 15 日Comparative analysis of processing scheme of automobile steering section Have a shape as a processing method, all machining process for the production of the most commonly used and most important method. Machining process is a process generated shape, in this process, Drivers device on the work piece material to be in the form of chip removal. Although in some occasions, the workpiece under no circumstances, the use of mobile equipment to the processing, However, the majority of the machining is not only supporting the workpiece also supporting tools and equipment to complete.Machining know the process has two aspects. Small group of low-cost production. For casting, forging and machining pressure, every production of a specific shape of the workpiece, even a spare parts, almost have to spend the high cost of processing. Welding to rely on the shape of the structure, to a large extent, depend on effective in the form of raw materials. In general, through the use of expensive equipment and without special processing conditions, can be almost any type of raw materials, mechanical processing to convert the raw materials processed into the arbitrary shape of the structure, as long as the external dimensions large enough, it is possible. Because of a production of spare parts, even when the parts and structure of the production batch sizes are suitable for the original casting, Forging or pressure processing to produce, but usually prefer machining.Strict precision and good surface finish, machining the second purpose is the establishment of the high precision and surface finish possible on the basis of. Many parts, if any other means of production belonging to the large-scale production, Well Machining is a low-tolerance and can meet the requirements of small batch production. Besides, many parts on the production and processing of coarse process to improve its general shape of the surface. It is only necessary precision and choose only the surface machining. For instance, thread, in addition to mechanical processing, almost no other processing method for processing. Another example is the blacksmith pieces keyhole processing, as well as training to be conducted immediately after the mechanical completion of the processing.Primary Cutting ParametersCutting the work piece and tool based on the basic relationship between the following four elements to fully describe : the tool geometry, cutting speed, feed rate, depth and penetration of a cutting tool.Cutting Tools must be of a suitable material to manufacture, it must be strong, tough, hard and wear-resistant. Tool geometry - to the tip plane and cutter angle characteristics - for each cutting process must be correct.Cutting speed is the cutting edge of work piece surface rate, it is inches per minute to show. In order to effectively processing, and cutting speed must adapt to the level of specific parts - with knives. Generally, the more hard work piece material, the lower the rate.Progressive Tool to speed is cut into the work piece speed. If the work piece or tool for rotating movement, feed rate per round over the number of inches to the measurement. When the work piece or tool for reciprocating movement and feed rate on each trip through the measurement of inches. Generally, in other conditions, feed rate and cutting speed is inversely proportional to.Depth of penetration of a cutting tool - to inches dollars - is the tool to the work piece distance. Rotary cutting it to the chip or equal to the width of the linear cutting chip thickness. Rough than finishing, deeper penetration of a cutting tool depth.Rough machining and finishing machiningThere are two kinds of cuts in machine- shop work called, respectively, the roughing cut and the finishing cut. When a piece is roughed out, it is quite near the shape and size required, but enough metal has been left on the surface to finish smooth and to exact size. Generally speaking, bars of steel, forging, castings, etc. are machined to the required shape and size with only one roughing and one finishing cut. Sometimes, however, certain portions of a piece may require more than one roughing cut. Also, in some jobs, for example, when great accuracy is not needed, or when a comparatively small amount of metal must be removed, a finishing cut may be all that is required. The roughing cut, to remove the greater part of the excess material, should be reasonably heavy, that is, all the machine, or cutting tool, or work, or all three, will stand. So the machinists purpose is to remove the excess stock as fast as he can without leaving, at the same time, a surface too torn and rough, without bending the piece if it is slender, and without spoiling the centers. The finishing cut, to make the work smooth and accurate, is a finer cut. The emphasis here is refinement - very sharp tool, comparatively little metal removed, and a higher degree of accuracy in measurement. Whether roughing or finishing, the machinist must set the machine for the given job. He must consider the size and shape of the work and the kind of material, also the kind of tool used and the nature of the cut to be made, then he proceeds to set the machine for the correct speed and feed and to set the tool to take the depth of cut desired.Automatic Fixture DesignAssembly equipment used in the traditional synchronous fixture put parts of the fixture mobile center, to ensure that components from transmission from the plane or equipment plate placed after removal has been scheduled for position. However, in certain applications, mobile mandatory parts of the center line, it may cause parts or equipment damage. When parts vulnerability and may lead to a small vibration abandoned, or when their location is by machine spindle or specific to die, Tolerance again or when the request is a sophisticated, it would rather let the fixture to adapt to the location of parts, and not the contrary. For these tasks, Elyria, Ohio, the company has developed Zaytran a general non-functional data synchronization West category FLEXIBILITY fixture. Fixture because of the interaction and synchronization devices is independent; the synchronous device can use sophisticated equipment to replace the slip without affecting the fixture force. Fixture specification range from 0.2 inches itinerary, 5 pounds clamping force of the six-inch trip, 400-inch clamping force. The characteristics of modern production are becoming smaller and smaller quantities and product specifications biggest changes. Therefore, in the final stages of production, assembly of production, quantity and product design changes appear to be particularly vulnerable. This situation is forcing many companies to make greater efforts to rationalize the extensive reform and the previously mentioned case of assembly automation. Despite flexible fixture behind the rapid development of flexible transport and handling devices, such as backward in the development of industrial robots, it is still expected to increase the flexibility fixture. In fact the important fixture devices - the production of the devices to strengthen investment on the fixture so that more flexibility in economic support holders.According to their flexibility and fixture can be divided into: special fixture, the fixture combinations, the standard fixture, high flexible fixture. Flexible fixture on different parts of their high adaptability and the few low-cost replacement for the characteristic.Forms can transform the structure of the flexible fixture can be installed with the change of structure components (such as needle cheek plate, Multi-chip components and flake cheek plate), a non-standard work piece gripper or clamping elements (for example: commencement standard with a clamping fixture and mobile components fixture supporting documents), or with ceramic or hardening of the intermediary substances (such as : Mobile particle bed fixture and heat fixture tight fixture). To production, the parts were secured fixture, the need to generate clamping function, its fixture with a few unrelated to the sexual submissive steps.According to the processing was part of that foundation and working characteristics to determine the work piece fixture in the required position, then need to select some stability flat combination, These constitute a stable plane was fixed in the work piece fixture set position on the clamp-profile structure, all balanced and torque, it has also ensured that the work features close to the work piece. Finally, it must be calculated and adjusted, assembly or disassembly be standard fixture components required for the position, so that the work piece firmly by clamping fixture in China. In accordance with this procedure, the outline fixture structure and equipped with the planning and recording process can be automated control.Structural modeling task is to produce some stable flat combination, Thus, these plane of the work pieces clamping force and will fixture stability. According to usual practice, this task can be human-machine dialogue that is almost completely automated way to completion. A man-machine dialogue that is automated fixture structure modeling to determine the merits can be conducted in an organized and planning fixture design reduce the amount of the design, shortening the study period and better distribution of work conditions. In short, can be successfully achieved significantly improve fixture efficiency and effectiveness.Fully prepared to structure programs and the number of material circumstances, the completion of the first successful assembly can save up to 60% of the time.Therefore fixture process modeling agencies is the purpose of the program has appropriate documents.中文翻譯汽車轉向節(jié)加工工藝方案對比分析機械加工是所有制造過程中最普遍使用的而且是最重要的方法。機械加工過程是一個產生形狀的過程,在這過程中,驅動裝置使工件上的一些材料以切屑的形式被去除。盡管在某些場合,工件無承受情況下,使用移動式裝備來實現(xiàn)加工,但大多數(shù)的機械加工是通過既支承工件又支承刀具的裝備來完成。機械加工過程中具備兩方面。小批生產低費用。對于鑄造、鍛造和壓力加工,每一個要生產的具體工件形狀,即使是一個零件,幾乎都要花費高額的加工費用??亢附觼懋a生的結構形狀,在很大程度上取決于有效的原材料的形式。一般來說,通過利用貴重設備而又無需特種加工條件下,幾乎可以以任何種類原材料開始,借助機械加工把原材料加工成任意所需要的結構形狀,只要外部尺寸足夠大,那都是可能的。因此對于生產一個零件,甚至當零件結構及要生產的批量大小上按原來都適于用鑄造、鍛造或者壓力加工來生產的,但通常寧可選擇機械加工。嚴密的精度和良好的表面粗糙度,機械加工的第二方面用途是建立在高精度和可能的表面粗糙度基礎上。許多零件,如果用別的其他方法來生產屬于大批量生產的話,那么在機械加工中則是屬于低公差且又能滿足要求的小批量生產了。另一方面,許多零件靠比較粗糙的生產加工工藝制造其表面形狀,而僅僅是在需要高精度的且選擇過的表面才進行機械加工。例如內螺紋,除了機械加工之外,幾乎沒有別的加工方法能進行加工。又如已鍛工件上的小孔加工,也是被鍛后緊接著進行機械加工才完成的。基本的機械加工參數(shù)切削中工件與刀具的基本關系是以以下四個要素來充分描述的:刀具的幾何形狀,切削速度,進給速度,和背吃刀量。切削刀具必須用一種合適的材料來制造,它必須是強固、韌性好、堅硬而且耐磨的。刀具的幾何形狀以刀尖平面和刀具角為特征對于每一種切削工藝都必須是正確的。切削速度是切削刃通過工件表面的速率,它是以每分鐘英寸來表示。為了有效地加工,切削速度高低必須適應特定的工件刀具配合。一般來說,工件材料越硬,速度越低。進給速度是刀具切進工件的速度。若工件或刀具作旋轉運動,進給量是以每轉轉過的英寸數(shù)目來度量的。當?shù)毒呋蚬ぜ魍鶑瓦\動時,進給量是以每一行程走過的英寸數(shù)度量的。一般來說,在其他條件相同時,進給量與切削速度成反比。背吃刀量以英寸計是刀具進入工件的距離。它等于旋削中的切屑寬度或者等于線性切削中的切屑的厚度。粗加工比起精加工,背吃刀量更大。粗切削與精切削工廠的切削加工有兩種,分別稱為“粗切削”和“精切削”。工件經“粗切削”后,十分接近所要求的形狀和尺寸,但加工表面仍留有足夠的金屬余量,以供精加工,使工件表面粗糙、尺寸準確。一般地說,鋼質棒料、鍛件、鑄件等只經一次粗切削和一次精切削即可達到所要求的形狀和尺寸。不過,有時工件的某些部位可能需要不止一次的粗切削。有些加工,如精度要求不高或需要切除的金屬量較小,也可能只需一次精切削。粗切削因為要去除大部分的余料,切削力量肯定是相當大的,這就意味著,整個機器、刀具、工件或這三者都要能承受得了。機加工工人的目的是盡可能快地切除余料,而留下的加工表面又不能太粗糙,細長的工件不能抗彎,也不能損壞頂尖。精切削是使工件表面光滑、尺寸準確,因而是一種更精細的切削。精加工強調的是精度使用非常鋒利的刀具,切除的金屬量較少,測量時的精密度要求較高。無論是粗切削還是精切削,機加工工人都必須按給定的工作來調好機床,必須考慮工件的大小和形狀,材料的種類,刀具的種類,以及行將切削的性質。然后開始把機床調到正確的轉速和進刀量,調好刀具使其達到要求的切削深度。自動夾具設計用做裝配設備的傳統(tǒng)同步夾具把零件移動到夾具中心上,以確保零件從傳送機上或從設備盤上取出后置于已定位置上。然而在某些應用場合、強制零件移動到中心線上時,可能引起零件或設備破壞。當零件易損壞而且小小振動可能導致報廢時,或當其位置是由機床主軸或模具來具體時,再或者當公差要求很精密時,那寧可讓夾具去適應零件位置,而不是相反。為著這些工作任務,美國俄亥俄州Elyria的Zaytran公司已經開發(fā)了一般性功能數(shù)據的非同步西類柔順性夾具。因為夾具作用力和同步化裝置是各自獨立的,該同步裝置可以用精密的滑移裝置來替換而不影響夾具作用力。夾具規(guī)格范圍是從0.2英寸行程,5英鎊夾緊力到6英寸行程、400英寸夾緊力?,F(xiàn)代生產的特征是批量變得越來越小而產品的各種規(guī)格變化最大。因此,生產的最后階段,裝配因生產計劃、批量和產品設計的變更而顯得特別脆弱。這種情形正迫使許多公司更多地致力于廣泛的合理化改革和前面提到過情況那樣裝配自動化。盡管柔性夾具的發(fā)展很快落后與柔性運輸處理裝置的發(fā)展,如落后于工業(yè)機器人的發(fā)展,但仍然試圖指望增加夾具的柔順性。事實上夾具的重要的裝置生產裝置的專向投資就加強了使夾具更加柔性化在經濟上的支持。根據它們柔順性,夾具可以分為:專用夾具、組合夾具、標準夾具、高柔性夾具。柔性夾具是以它們對不同工件的高適應性和以少更換低費用為特征的。結構形式可變換的柔性夾具裝有可變更結構排列的零件(例如針形頰板,多片式零件和片狀頰板),標準工件的非專用夾持或夾緊元件(例如:啟動標準夾持夾具和帶有可移動元件的夾具配套件),或者裝有陶瓷或硬化了的中介物質(如:流動粒子床夾具和熱夾具緊夾具)。為了生產,零件要在夾具中被緊固,需要產生夾緊作用,其有幾個與夾具柔順性無關的步驟:根據被加工工件基礎的部分和工作特點,確定工件在夾具中的所需的位置,接著必須選擇若干穩(wěn)定平面的組合,這些穩(wěn)定平面就構成工件被固定在夾具中確定位置上的夾具上,均衡所有的力和力矩,而且保證接近工件工作特點。最后,必須計算、調整、組裝可拆裝的或標準夾具元件的所需位置,以便使工件牢牢地被夾緊在夾具中。依據這樣的程序,夾具的輪廓結構和裝合的規(guī)劃和記錄過程可以進行自動化控制。結構造型任務就是要產生若干穩(wěn)定平面的組合,這樣在這些平面上的各夾緊力將使工件和夾具穩(wěn)定。按慣例,這個任務可用人機對話即幾乎完全自動化的方式來完成。一人機對話即以自動化方式確定夾具結構造型的優(yōu)點是可以有組織有規(guī)劃進行夾具設計,減少所需的設計人員,縮短研究周期和能更好地配置工作條件。簡言之,可成功地達到顯著提高夾具生產效率和效益。在充分準備了構造方案和一批材料情況下,在完成首次組裝可以成功實現(xiàn)節(jié)約時間達60%。因此夾具機構造型過程的目的是產生合適的編程文件。附表2:長城學院本科畢業(yè)設計(論文)中期檢查表系:工程技術系 專業(yè):機械設計制造及其自動化 檢查日期:2015-04-07學生姓名孫林論文題目小型汽車液壓助力轉向系統(tǒng)設計任務書已完成( ),進行中( )參考文獻 20 篇:其中外文文獻 6 篇外文翻譯已完成( ),進行中( );完成字數(shù)約: 4500 字(翻譯成的漢字字數(shù))開題報告已完成( ),進行中( );完成字數(shù)約: 1100 字正文已完成( ),進行中( );完成比比例: 70 %已完成的任務開題報告,任務書,外文翻譯,文獻綜述,待完成的任務設計圖紙及設計說明書存在的問題對于一些細節(jié)上的設計還需要進一步確定。采取的辦法多做假設和對比,選出一種最優(yōu)的設計方案。指導教師意見 指導教師簽名: 注:按表中的要求填寫,選項打鉤();附表3畢業(yè)論文(設計)教師指導記錄表畢業(yè)論文(設計)題目小型汽車液壓助力轉向系統(tǒng)設計學生姓名孫林系(部)工程技術系學生學號05211518專業(yè)班級機制五班指導教師姓名于建波職稱高級工程師主要指導內容: 液壓動力轉向系統(tǒng)的指導 指導時間:2015 年 3 月 10 日主要指導內容:液壓回路設計及工作原理指導 指導時間:2015 年 3 月 20 日主要指導內容:指出設計的缺陷,對所設計液壓助力轉向系統(tǒng)提出修改意見 指導時間:2015 年3 月 25 日主要指導內容: 指導時間: 年 月 日注:此表由指導教師按畢業(yè)論文(設計)的主要工作階段填寫主要指導內容。 系主任簽字(蓋章)中國地質大學長城學院畢業(yè)設計(論文)開題報告學生姓名孫林學 號05211518專業(yè)班級11級機制五班指導教師于建波職 稱高級工程師單 位中國地質大學長城學院課題性質設計 論文課題來源科研 教學 生產 其它畢業(yè)設計(論文)題目小型汽車液壓助力轉向系統(tǒng)設計一、課題研究的目的通過本次研究,掌握機械設計的一般方法,培養(yǎng)完善的設計思想,鍛煉分析問題、解決問題的能力,特別是掌握總體設計和零部件設計的方法與技巧。綜合運用機械設計與原理及其他有關的專業(yè)知識,去分析和解決生活工作中的問題,做到理論聯(lián)系實際,進一步鞏固自己所學到的知識。二、課題研究的意義 助力轉向,顧名思義,就是通過增加外力來抵抗轉向阻力,讓駕駛者只需更少的力就能夠完成轉向,也稱動力轉向,英文為power steering,最初是為了讓一些自重較重的大型車輛能夠更輕松的操作,但是現(xiàn)在已經非常普及,它讓駕駛變得更加簡單和輕松,并且讓車輛反應更加敏捷,一定程度上提高了安全性。我們常見的助力轉向有機械液壓助力、電子液壓助力、電動助力三種。三、課題研究現(xiàn)狀自1953 年通用汽車公司在凱迪萊克和別克轎車上首次批量使用了液壓動力轉向系統(tǒng)以來, 液壓動力轉向系統(tǒng)給汽車帶來了巨大的變化: 人們不再需要靠大直徑的轉向盤來產生足夠的轉向力矩, 轉向盤的減小, 使得駕駛室變得寬敞起來, 座椅布置也變得更為舒適了; 液壓動力轉向系統(tǒng)在降低了轉向操縱力的同時, 也使轉向變得更為靈敏。隨著技術的發(fā)展, 動力轉向系統(tǒng)在體積、價格和所消耗的功率等方面都取得了驚人的進步。在八十年代后期, 又開發(fā)了變減速比、電控液壓動力轉向系統(tǒng)。今天, 變速比的液壓動力轉向系統(tǒng)幾乎成為發(fā)達國家所銷售轎車的標準裝備。幾十年來, 動力轉向系統(tǒng)的技術革新都是在液壓動力轉向系統(tǒng)基礎上的。即便是電控液壓動力轉向系統(tǒng)也無法根除液壓動力轉向系統(tǒng)在系統(tǒng)布置、安裝、密封性、操縱靈敏度、能量消耗、磨損與噪聲等方面的固有缺憾。直到1988 年3 月, 日本鈴木公司開發(fā)出一種全新的電子控制式電動助力轉向系統(tǒng)(以下簡稱:電動助力轉向系統(tǒng)) , 才真正擺脫了液壓動力轉向系統(tǒng)的束縛。1993 年, 本田汽車公司首次將電動助力轉向系統(tǒng)裝備于大批量生產的、在國際市場上同法拉利和波爾舍競爭的愛克N SX 跑車上; 同年, 在歐洲市場銷售的一種經濟型轎車菲亞特幫托也將美國德爾費公司生產的電控助力轉向系統(tǒng)作為標準裝備; 由于電控助力轉向系統(tǒng)完全取消液壓裝置, 用電能取代液壓能, 減少了發(fā)動機的能量消耗; 加上其性能的優(yōu)越性, 很快在越來越多的國外轎車上得到應用, 如本田最新推出的In sigh t 轎車上就是其中的一例。電動助力轉向系統(tǒng)無疑是未來動力轉向設計的新方向, 目前在中型以上貨車和中級以上轎車上廣泛采用的機械液壓動力轉向器將逐漸被效率更高、適應性更強的電動助力轉向系統(tǒng)所代替。為此, 國外幾家大公司(如德國的ZF、英國盧卡斯偉利達、Saginaw、TRW、日本的N SK、Koyo 等) 都竟相推出自己的電動助力轉向系統(tǒng)。目前國內動力轉向器還處在機械液壓式動力轉向系階段, 對于電動助力轉向系統(tǒng)僅有清華、華工等高校開展了系統(tǒng)結構方案設計、系統(tǒng)建模和動力分析等研究, 但處在研制的初級階段, 未達到實用程度。四、課題研究的內容1.液壓助力轉向系統(tǒng)的介紹;2.液壓動力轉向;3.液壓助力轉向系統(tǒng)的組成;4.液壓助力轉向系統(tǒng)的工作原理;5.液壓回路設計及工作原理;6.硬件選??;7.液壓助力轉向系統(tǒng)特點及應用; 5、 研究方案可行性分析確定設計任務.液壓助力轉向系統(tǒng)設計方案分析確定系統(tǒng)的工作原理和技術要求方案設計技術評價確定設計方案總裝配圖總體規(guī)劃設計部件裝配圖部件技術設計零部件設計零件工作圖六、進度安排序號畢業(yè)設計(論文)各階段內容 時間安排 1 查閱、收集資料,熟悉有關的資料,學習相關的知識。 2014.12 2 結合畢業(yè)設計課題進行外文資料閱讀并翻譯外文資料。 2014.12 3 開始編寫畢業(yè)設計工作計劃。 2015.1 4 熟悉設計任務,提出初步的設計方案,并征求指導教師的意見。 2015.2 5 擬定總體方案,繪出系統(tǒng)圖,定出相關參數(shù),并繪出總體草圖。 2015.3 6 對草圖進行修改,并完成開題報告。 2015.3 7 整理資料,編寫設計說明書。 2015.4. 8 準備答辯。 2013年4月開始七、預期結果 液壓助力轉向系統(tǒng)是當前眾多學者共同關注的前沿熱門研究領域。通過了解、熟悉國內外有關液壓助力轉向系統(tǒng)的設計創(chuàng)新情況,得知液壓助力轉向系統(tǒng)的發(fā)展現(xiàn)狀與應用前景。由于時間緊張、設計中的不足,本次研究有可能還有需要完善的地方。本次開題報告只是初步的設計構思,但理論上任具有可行性,實踐還有待進一步證明。而液壓助力轉向系統(tǒng)的應用,將為我們帶來很多便利與好處。8、 參考文獻1 毛彩云,吳暮春,柯松.汽車轉向系統(tǒng)的發(fā)展J.科普園,2009.2 陳家瑞.汽車構造下冊M.北京:人民交通出版社,2002.3 王望予.汽車設計(第4版)M.北京:機械工業(yè)出版社,2004.4 王豐元,馬明星. 汽車設計課程設計指導書M.北京:中國電力出版社,5 濮良貴、紀名剛.機械設計M.北京:高等教育出版社,2010.6 余志生.汽車理論M.北京:機械工業(yè)出版社,2000.7 徐石安汽車構造-底盤工程M北京:清華大學出版社,2008指導教師意見:指導教師簽名:年 月 日教研室意見:審查結果: 同 意 不 同 意教研室主任簽名:年 月 日
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