外文翻譯--機(jī)械設(shè)計(jì)

1、<p><b>　　付：外文翻譯</b></p><p><b>　　機(jī)械設(shè)計(jì)</b></p><p><b>　　摘要</b></p><p>　　機(jī)器是機(jī)構(gòu)與其他零件的組合，為了有益的用途而轉(zhuǎn)換、傳遞或利用能量、力或者運(yùn)動(dòng)實(shí)例有發(fā)動(dòng)機(jī)、渦輪、車輛、卷揚(yáng)機(jī)、印刷機(jī)、洗衣機(jī)和電影攝影機(jī).許

2、多適用于機(jī)器設(shè)計(jì)的原理和力法也適用于不是真正機(jī)器的制成品，從輪轂蓋和檔案櫥柜到儀表和核壓力容器?！皺C(jī)械設(shè)計(jì)”這一術(shù)語比“機(jī)器設(shè)計(jì)”更為廣義，它包括機(jī)器設(shè)計(jì)。而對(duì)于某些儀器，如用以確定熱、流動(dòng)線路和體積的熱力以及流體方面的問題要單獨(dú)考慮。但是，在機(jī)械設(shè)計(jì)時(shí)要考慮運(yùn)動(dòng)和結(jié)構(gòu)方面的問題以及保存和封裝的規(guī)定。在機(jī)械工程領(lǐng)域以及其他工程領(lǐng)域應(yīng)用機(jī)械設(shè)計(jì)，都需要諸如開關(guān)、凸輪、閥門、容器和攪拌器等機(jī)械裝置。</p><p>

3、　　關(guān)鍵詞：機(jī)械設(shè)計(jì)機(jī)構(gòu)設(shè)計(jì)過程工差</p><p><b>　　設(shè)計(jì)過程</b></p><p>　　設(shè)計(jì)始于真正的或想象的需要?，F(xiàn)有的儀器可能需要在耐用性、效率、重量、速度或成本上加以改進(jìn)。可能需要新的儀器來完成以前由人做的功能，如裝配或保養(yǎng)。目標(biāo)全部或部分地確定后，設(shè)計(jì)的下一步就是構(gòu)思能夠完成所需功能的機(jī)構(gòu)及其布置為此，徒手畫草圖價(jià)值極大，它不但作為一個(gè)人想法的

4、記錄和與其他人討論的輔助手段，而且尤其適于與自己的想法交流，作為創(chuàng)造性思路的興奮劑還需要有關(guān)于部件的廣泛知識(shí)，因?yàn)橐慌_(tái)新機(jī)器常常由熟知的各類零件重新安排或替換而成，也許改變了尺寸和材料。無論在構(gòu)思過程中還是之后，一個(gè)設(shè)計(jì)者都會(huì)進(jìn)行快速或粗略的計(jì)算或分析以確定一般尺寸和可行性。當(dāng)些關(guān)于所需或可用空間量的想法確定后，可以開始按比例畫草圖。</p><p>　　最后，一項(xiàng)基于功能和可靠性的設(shè)計(jì)完成了，就可以制造樣機(jī)了。

5、如果測(cè)試滿意，而且如果裝置要大量生產(chǎn)，就要對(duì)最初的設(shè)計(jì)進(jìn)行一定的修改以確保以較低成本大量生產(chǎn)。在隨后幾年的制造和使用期間，設(shè)計(jì)有可能因構(gòu)思了新想法或者基于測(cè)試和經(jīng)驗(yàn)基礎(chǔ)上的進(jìn)一步分析所顯示的改變而改變。銷售吸引力、客戶滿意度和制造成本都與設(shè)計(jì)有關(guān)，設(shè)計(jì)能力與工程投資的成功密切相關(guān)。</p><p><b>　　一些設(shè)計(jì)準(zhǔn)則</b></p><p>　　在這一部分，有人

6、建議運(yùn)用創(chuàng)造性的態(tài)度進(jìn)行的分析，這種分析可以引起重大改進(jìn)以及對(duì)備用產(chǎn)品的構(gòu)思和完善，也許產(chǎn)品功能更多、更經(jīng)濟(jì)、更耐用。創(chuàng)造階段無須是最初和獨(dú)立的階段。雖然分析人員可能并不負(fù)責(zé)整個(gè)設(shè)計(jì)，但是他不僅僅是能從數(shù)字上提出要他解決的問題的正確答案，不僅僅是給出應(yīng)力值、尺寸或者工作限制。他可以提出更廣泛的見解，以便改進(jìn)規(guī)范或方案。由于在分析前或分析過程中，他會(huì)熟悉裝置及其工作條件，他就處于一個(gè)構(gòu)思備選方案的有利位置。最好他能提出建議改變形狀來消除力

7、矩或應(yīng)力集中，而不是允許構(gòu)建具有大截面和過多動(dòng)態(tài)載荷的機(jī)構(gòu)最好是他報(bào)廢他的細(xì)致的設(shè)計(jì)而不是后來看到機(jī)械報(bào)廢。</p><p>　　為了激發(fā)創(chuàng)造性思維，建議設(shè)計(jì)人員和分析人員使用以下準(zhǔn)則。前6條準(zhǔn)則尤其適用于分析人員，雖然他可能涉及到所有這10項(xiàng)。</p><p>　　1.創(chuàng)造性地利用所需的物理性能并控制不需要的。</p><p>　　2.認(rèn)識(shí)實(shí)用載荷及其重要性。&l

8、t;/p><p>　　3.預(yù)先考慮沒有作用的載荷。</p><p>　　4.發(fā)明更有利的加載條件。</p><p>　　5.提供最小重量的最有利的應(yīng)力分布和剛性。</p><p>　　6.用基本方程計(jì)算比例并使尺寸最優(yōu)化。</p><p>　　7.選取材料以獲得性能組合。</p><p>　　8.在

9、備件和集成零件間仔細(xì)選擇。</p><p>　　9.修改功能設(shè)計(jì)以適應(yīng)生產(chǎn)過程和降低成本。</p><p>　　10.考慮裝配中使部件精確定位和互不干擾。</p><p><b>　　機(jī)械設(shè)計(jì)</b></p><p>　　整個(gè)機(jī)械設(shè)計(jì)是一個(gè)復(fù)雜的過程。設(shè)計(jì)人員必須在這樣的領(lǐng)域，如靜力學(xué)、運(yùn)動(dòng)學(xué)、動(dòng)力學(xué)和材料力學(xué)具有良好的

10、素養(yǎng)，此外，還必須熟悉制造材料和制造工藝。設(shè)計(jì)人員必須能夠組合所有相關(guān)的事實(shí)，進(jìn)行訓(xùn)渭、制作草圖和制圖來把制造要求傳遞到車間。</p><p>　　任何產(chǎn)品設(shè)計(jì)的第一步工作之一是選擇用于制造每個(gè)部件的材料。今天的設(shè)計(jì)人員可得到無數(shù)的。在選擇時(shí)，產(chǎn)品的功能、外觀、材料成本和制造成本都很重要。在任何計(jì)算之前必須仔細(xì)評(píng)估材料的性能。</p><p>　　有必要仔細(xì)計(jì)算以確保設(shè)計(jì)的有效性.計(jì)算從不

11、出現(xiàn)在圖上,而是由十各種原因被存起來。一旦任何一個(gè)部件失效，就要弄清楚在最初設(shè)計(jì)這個(gè)有缺陷的零件時(shí)做了什么；而且，從對(duì)過去的項(xiàng)目的計(jì)算中可以獲得一份經(jīng)驗(yàn)文件。當(dāng)需要類似的設(shè)計(jì)時(shí)，過去的記錄會(huì)有極大的幫助。</p><p>　　計(jì)算（和圖上尺寸）的檢查最為重要。一個(gè)小數(shù)點(diǎn)放錯(cuò)位置可以毀掉一個(gè)本來可以接受的項(xiàng)目。例如，如果一個(gè)人要設(shè)計(jì)一個(gè)能支撐100磅的托架，而它本應(yīng)該能支撐1000磅，結(jié)果肯定會(huì)失敗。必須檢查再檢查

12、設(shè)計(jì)工作的方方面面。</p><p>　　計(jì)算機(jī)對(duì)于工作人員來講是一個(gè)很有用的工具，可以減輕乏味的計(jì)算并且對(duì)現(xiàn)有數(shù)據(jù)提供擴(kuò)展分析?；谟?jì)算機(jī)性能的交互系統(tǒng)使計(jì)算機(jī)輔助設(shè)計(jì)（CAD）和計(jì)算機(jī)輔助制造（CAM)成為可能。通過這樣的系統(tǒng)，就可能把一個(gè)初步構(gòu)思傳送到打孔紙帶用于數(shù)字加工控制而無須繪制正式的施工圖。</p><p>　　實(shí)驗(yàn)室測(cè)試、模型和樣機(jī)對(duì)于機(jī)械設(shè)計(jì)很有幫助。實(shí)驗(yàn)室提供了很多建立

13、基本概念所需的信息，然而，還可用它們獲得一些關(guān)于產(chǎn)品在現(xiàn)場(chǎng)會(huì)如何工作的認(rèn)識(shí)</p><p>　　最后，一個(gè)成功的設(shè)計(jì)人員應(yīng)盡最大努力跟上時(shí)代步伐。每天都會(huì)出現(xiàn)新材料和生產(chǎn)方法。繪圖和設(shè)計(jì)人員如果不熟悉現(xiàn)代方法和材料就可能失去作用。一個(gè)好的設(shè)計(jì)人員應(yīng)經(jīng)常閱讀技術(shù)期刊以跟上新的發(fā)展</p><p><b>　　工程工差</b></p><p>　　

14、固體由其表面邊界確定界限。典型地，設(shè)計(jì)人員給一個(gè)零件指定公稱尺寸以使其滿足其需要。實(shí)際上由于表面不規(guī)則以及固有的表面粗糙度，各個(gè)零件不能重復(fù)地做成公稱尺寸必須允許尺寸有一些變化以確保能夠制造。但是，所允許的變化一定不能太大以至于使裝配件的性能變差。單個(gè)零件所允許的變化稱為公差。</p><p>　　公差這一術(shù)語不僅適用于由制造工藝產(chǎn)生的部件尺寸的可以接受的范圍，而且適用于機(jī)械或加工的輸出。例如，一個(gè)給定型號(hào)的內(nèi)燃

15、機(jī)的功率每臺(tái)都有所變化。實(shí)際上，我們常常發(fā)現(xiàn)這種變化模型會(huì)是頻率分布曲線，例如t.態(tài)分布（又叫高斯分布）。設(shè)計(jì)人員的工作之一就是給一個(gè)零件指定尺寸和允許的變化，這個(gè)值能夠產(chǎn)生可以接受的性能。</p><p><b>　　零件公差</b></p><p>　　當(dāng)圖中沒有指定確切尺寸時(shí)，大多數(shù)組織都有適用于尺寸的通用公差。對(duì)于加工尺寸，通用公差可能是±0.5毫米

16、。因此，被指定為15.0毫米的尺寸的范圍可以是14.5毫米到15.5毫米之間。其他通用公差可以適用于如角度、鉆孔和沖孔，鑄件、鍛件、焊縫和焊角等情形。</p><p>　　在給一個(gè)零件指定公差時(shí)，可以參考以前的圖或一般的工程實(shí)踐。典型的公差被指定為英武成JSO標(biāo)準(zhǔn)所定義的幅度。對(duì)于一個(gè)給定公差，比如H7/s6，對(duì)于正在研究的零件尺寸就有一組與圖表對(duì)應(yīng)的數(shù)值可用。下面這段將給出關(guān)于裝入孔內(nèi)的軸或柱形配合的具體例子。

17、</p><p><b>　　孔和軸的標(biāo)準(zhǔn)配合</b></p><p>　　一項(xiàng)標(biāo)準(zhǔn)的工程工作是確定一個(gè)柱形零件的公差，比如安裝在一個(gè)相應(yīng)的筒形零件或孔內(nèi)的．或者是在其內(nèi)部旋轉(zhuǎn)的軸配合的松緊取決于應(yīng)用例如，一個(gè)定位在軸上的齒輪就需要“緊”的靜配合，這里軸的直徑實(shí)際上比齒輪毅的內(nèi)徑稍微大一些以便能傳遞所需的扭矩。再者，滑動(dòng)軸承的直徑必須大于軸的直徑以使其旋轉(zhuǎn)。假定從經(jīng)濟(jì)

18、上講不能把部件制造成精確的尺寸，軸和孔尺寸上的大小變化就必須確定。但是，變化的范圍不應(yīng)太大以免裝配時(shí)受損</p><p>　　為了不至于有無窮無盡的被指定的公差尺寸，已經(jīng)制定了國家和國際標(biāo)準(zhǔn)確定了公差帶，比如hll/cll。為了使用這一資料，給出了傳統(tǒng)公差使用中的定義。通常使用的是基孔制，因?yàn)檫@會(huì)使公司內(nèi)部所需的鉆頭、絞刀、拉刀和計(jì)量工具種類的減少。</p><p>　　尺寸：以專用單位表

19、示尺寸數(shù)字值的數(shù)。</p><p>　　實(shí)際尺寸：通過測(cè)量得到的部件尺寸。</p><p>　　尺寸極限：零件允許的最大和最小尺寸。</p><p>　　最大尺寸極限：兩個(gè)尺寸極限中較大的。</p><p>　　最小尺寸極限：兩個(gè)尺寸極限中較小的</p><p>　　基本尺寸：用以固定尺寸極限的參考尺寸</p&g

20、t;<p>　　偏差：一個(gè)尺寸與其對(duì)應(yīng)的基本尺寸的代數(shù)差</p><p>　　實(shí)際偏差：實(shí)際尺寸與其對(duì)應(yīng)的基本尺寸的代數(shù)差。</p><p>　　上偏差：最大尺寸極限與其對(duì)應(yīng)的基本尺寸的代數(shù)差</p><p>　　下偏差：最小尺寸極限與其對(duì)應(yīng)的基本尺寸的代數(shù)差</p><p>　　公差：最大尺寸極限與最小尺寸極限的差值。<

21、/p><p>　　軸：指定一個(gè)部件所有外部特征的慣用術(shù)語</p><p>　　孔：指定一個(gè)部件所有內(nèi)部特征的慣用術(shù)語。</p><p>　　初步設(shè)計(jì)產(chǎn)生滿足指定需求的解決方案。初步設(shè)計(jì)可以代表組成整個(gè)系統(tǒng)的所有子系統(tǒng)和零部件的總和。Ion和Smith把初步設(shè)計(jì)描述為由一系列形成和評(píng)估階段組成的一個(gè)反復(fù)的過程，各階段合在一起形成好的解決方案。在反復(fù)的每一階段，構(gòu)思更加詳細(xì)

22、，可以更全面的評(píng)估。</p><p>　　產(chǎn)生盡可能多的或經(jīng)濟(jì)便利的構(gòu)思和想法是重要的。有一種誘惑，讓你接受第一個(gè)有希望的構(gòu)思并進(jìn)行詳細(xì)的設(shè)計(jì)直到最終產(chǎn)品。應(yīng)該抵抗這種誘惑，因?yàn)檫@樣結(jié)果總會(huì)更好些。值得一提的是，或早或晚你的設(shè)計(jì)會(huì)不得不與那些來自其他制造商的設(shè)計(jì)競爭，因此產(chǎn)生研制的思想應(yīng)謹(jǐn)慎。</p><p>　　產(chǎn)生了想法和構(gòu)思后，下一步就是對(duì)它們進(jìn)行評(píng)估并選擇最佳構(gòu)思．一種評(píng)估方法是使

23、用列表矩陣。矩陣由一系列準(zhǔn)則組成．構(gòu)思必須借助它們打分。如果合適，準(zhǔn)則的重要性可以加權(quán)，最適合的構(gòu)思會(huì)具有最高總分。這一方法提供了組織的評(píng)估技術(shù)．而且使團(tuán)隊(duì)內(nèi)的個(gè)人很難推行他們自己的不合理的想法。</p><p>　　產(chǎn)生了初步的解決方案，下一步就是表達(dá)它們，以便它們能與所有涉及總體設(shè)計(jì)過程的人交流實(shí)際上，這一步可以采用繪制草圖或三維模型的形式，既可是物理模型也可是計(jì)算機(jī)生成的模型。到總草圖己經(jīng)完成并進(jìn)行計(jì)算來確

24、定解決方案對(duì)于產(chǎn)品設(shè)計(jì)規(guī)范的兼容性時(shí)，細(xì)節(jié)設(shè)計(jì)階段的基礎(chǔ)就已建立起來了。</p><p>　　Mechanical Design</p><p>　　Abstract: </p><p>　　A machine is a combination of mechanisms and other components which transforms, transmit

25、s, or utilizes energy, force, or motion for a useful purpose. Examples are engines, turbines, vehicles, hoists, printing presses, washing machines, and movie cameras. Many of the principles and methods of design that app

26、ly to machines also apply to manufactured articles that are not true machines, from hub caps and filing cabinets to instruments and nuclear pressure vessels. The term "mechanical design" is us</p><p&

27、gt;　　Keywords: Mechanical Designmechanisms Design Process Tolerance</p><p>　　Design processThe design begins from real of or the demand of imagination.The existing instrument may need to take in to improve

28、on the enduring, efficiency, weight, speed or the cost.May need new instrument to complete before function done by person, such as Assemble or maintain.The target is all or partly after making sure, design of the next mo

29、ve is to conceive outline the organization that can complete the function needed and it arranges for this, drawing grass diagram to be worth barehande</p><p>　　Finally, 1 completed according to the design of

30、 the function and the credibility, can make kind machine.If test satisfied, and if the device wants mass production, will to the first design carry on a certain modification to insure with lower cost mass-produce.Later o

31、n several years of make and use a period, design probably because of conceive outline new viewpoint perhaps according to test and experience foundation of further analytical the change shown but change.Sell attraction, c

32、ustomer's sat</p><p>　　Some design standardsAt this part, someone suggests the attitude of the usage creation carries on of analysis, this kind of analysis can cause a graveness improvement and to back

33、up the product conceive outline with perfect, perhaps the product function is more, more economic and more enduring.Creating the stage's needing not is first with independent stage.Although analyze personnel the whol

34、e probably irresponsible design, he isn't only the right answer of[with] problem that can be from the nu</p><p>　　For stiring up to create sex thinking, the suggestion designs a personnel and analytical

35、the personnel use following standard.6 ex- standards are particularly applicable to an analysis personnel, although he may involve to all this 10.1.Create the physical function that sex land utilization need when using

36、combine the control don't need.</p><p>　　2.Know practical carry lotus and its importance.3.Consider in advance there is no function carrying a lotus.4.Invent to add to carry a condition more beneficial

37、ly.5.Provide minimum weight the most beneficial of distribute in response to the dint with rigid.6.Use a basic and square distance calculation a comparison and make size superior to turn.7.Select by examinations mater

38、ial to acquire a function combination.8.At spare parts and integrated spare parts careful choice.9.Modify a function</p><p>　　Mechanical Design</p><p>　　The whole machine design is a complicat

39、ed process.Designing the personnel have to at thus of realm, such as calm down mechanics, kinetics, dynamics and material mechanics have good cultivated manners, have to also acquaint with manufacturing material and make

40、 a craft in addition.Designing the personnel has to can combine all related facts, carrying on Teaches Wei and creating grass diagram and graphics to come to deliver the manufacturing request to the car.The square one t

41、hat any product desig</p><p>　　The engineering work is bad The solid is made sure boundary by its surface boundary.Typical model ground, design a personnel to specify Mr. to call size to a spare parts to

42、 make it contented its demand.Actually because of the surface irregular and proper surface rough degree, each spare parts can't make into Mr. to call size's hasing to allow size to have some varieties can make wi

43、th insuring repeatedly.But, the variety allowed can't certainly too big with as for make to assemble the functio</p><p>　　Business trip this technical term not only is applicable to from the acceptable s

44、cope of the parts size of[with] manufacturing craft creation, but also is applicable to a machine or processes of exportation.For example, a give already set number of thepower each pedestals of I.C. engine have variety.

45、Actually, we usually discover this kind of variety model will be a frequency to distribute curve, for example t.The distributes.(call the Gauss distribute again)One of the work which designs a person</p><p>

46、　　Spare parts business tripWhen there is no appointed accurate size in the diagram, most organizations all have in general use business trip of being applicable to the size.For process size, in general use business trip

47、's maying be a ± is 0.5 millimeters.Therefore being specified to 15.0 millimeter scopes of sizes can be of 14.5-15.5 millimeters.Other in general use business trips can be applicable to such as the angle and dri

48、ll a hole with blunt bore, The casting, the forging, the welded joint a</p><p>　　The standard match of bore and stalkA standard of the engineering work is the business trip which makes sure a pillar form sp

49、are parts, installing for example in a tube form spare parts or bore for corresponding of.perhaps is the stalk which revolves in its inner part to match with of loose be decided by application tightly for example, a whee

50、l gear which positions on the stalk needs to be"tight" of quiet match, here stalk of the diameter compares wheel gear actually of inside path a little bit</p><p>　　Size:Mean the number of the size

51、numerical value by appropriation unit.Actual size:The parts size got through a diagraphSize extreme limit:The spare parts allows of biggest with most baby size.The biggest size extreme limit:Bigger in two size extreme

52、limitsMost baby size extreme limit:Smaller in two size extreme limits ofBasic size:Fix the reference size of size extreme limit in order toDeviation:A size with it to should of the algebra of basic size badActual dev

53、iation:Actual size with it </p><p>　　The initial design creation satisfies appointed demanding solution.The initial design can represent all sub- systems of constituting the whole system with the total of ze

54、ro partses.Ion and Smith describe an initial design for is become by a series and evaluate a stage to constitute of an iterative process, each stage matches together to become a good solution.At each iterative stage conc

55、eive outline more in detail, can more overall valuation.Produce possibly many of or the economy is convenient</p><p>　　Is to them to carry on valuation to combine choice next move after producing viewpoint

56、and conceiving outline the best conceive outline.a kind of valuation method is to use row watch matrix.The matrix constitutes to°from a series of standard. conceive outline have to ask for help them to beat a cent.I

57、f suitable, the importance of the standard can add power, conceiving outline most in keeping withly will have a tallest total cent.This method provided a built-up valuation technique. and make perso</p><p>　

58、　Produced the solution of first step, the next move was to express them, in order to they ability and all involve total design process of the persons communicate actually, this one step can adopt forms of drawing the gra

59、ss diagram or 3D models, since but physical model also but the calculator born model. Of the total plan has been completed and calculated to determine solutions for product design compatibi-Lity, details of the design ph