機(jī)械設(shè)計(jì)理論外文翻譯

1、<p>　　Article 2、</p><p>　　Machine design theory</p><p>　　The machine design is through designs the new product or improves the old product to meet the human need the application technical

2、science. It involves the project technology each domain, mainly studies the product the size, the shape and the detailed structure basic idea, but also must study the product the personnel which in aspect the and so on m

3、anufacture, sale and use question.</p><p>　　Carries on each kind of machine design work to be usually called designs the personnel or machine design engineer. The machine design is a creative work. Project e

4、ngineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary

5、 knowledge. </p><p>　　If front sues, the machine design goal is the production can meet the human need the product. The invention, the discovery and technical knowledge itself certainly not necessarily can b

6、ring the advantage to the humanity, only has when they are applied can produce on the product the benefit. Thus, should realize to carries on before the design in a specific product, must first determine whether the peop

7、le do need this kind of product</p><p>　　Must regard as the machine design is the machine design personnel carries on using creative ability the product design, the system analysis and a formulation product

8、manufacture technology good opportunity. Grasps the project elementary knowledge to have to memorize some data and the formula is more important than. The merely service data and the formula is insufficient to the comple

9、tely decision which makes in a good design needs. On the other hand, should be earnest precisely carries on all op</p><p>　　A good design personnel should dare to propose the new idea, moreover is willing to

10、 undertake the certain risk, when the new method is not suitable, use original method. Therefore, designs the personnel to have to have to have the patience, because spends the time and the endeavor certainly cannot guar

11、antee brings successfully. A brand-new design, the request screen abandons obsoletely many, knows very well the method for the people. Because many person of conservativeness, does this certainly i</p><p>　　

12、Newly designs itself can have the question occurrence which many flaws and has not been able to expect, only has after these flaws and the question are solved, can manifest new goods come into the market the product supe

13、riority. Therefore, a performance superior product is born at the same time, also is following a higher risk. Should emphasize, if designs itself does not request to use the brand-new method, is not unnecessary merely fo

14、r the goal which transform to use the new method. </p><p>　　In the design preliminary stage, should allow to design the personnel fully to display the creativity, not each kind of restraint. Even if has had

15、many impractical ideas, also can in the design early time, namely in front of the plan blueprint is corrected. Only then, only then does not send to stops up the innovation the mentality. Usually, must propose several se

16、ts of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has used cer</p><p>　　How does the psychologist frequently discuss causes the machine

17、which the people adapts them to operate. Designs personnel''s basic responsibility is diligently causes the machine to adapt the people. This certainly is not an easy work, because certainly does not have to all

18、people to say in fact all is the most superior operating area and the operating process. </p><p>　　Another important question, project engineer must be able to carry on the exchange and the consultation with

19、 other concerned personnel. In the initial stage, designs the personnel to have to carry on the exchange and the consultation on the preliminary design with the administrative personnel, and is approved. This generally i

20、s through the oral discussion, the schematic diagram and the writing material carries on. In order to carry on the effective exchange, needs to solve the following problem:</p><p>　　(1) designs whether this

21、product truly does need for the people? Whether there is competitive ability </p><p>　　(2) does this product compare with other companies'' existing similar products? </p><p>　　(3) produ

22、ces this kind of product is whether economical? </p><p>　　(4) product service is whether convenient? </p><p>　　(5) product whether there is sale? Whether may gain?</p><p>　　Only has

23、 the time to be able to produce the correct answer to above question. But, the product design, the manufacture and the sale only can in carry on to the above question preliminary affirmation answer foundation in. Project

24、 engineer also should through the detail drawing and the assembly drawing, carries on the consultation together with the branch of manufacture to the finally design proposal.</p><p>　　Usually, can have some

25、problem in the manufacture process. Possibly can request to some components size or the common difference makes some changes, causes the components the production to change easily. But, in the project change must have to

26、 pass through designs the personnel to authorize, guaranteed cannot damage the product the function. Sometimes, when in front of product assembly or in the packing foreign shipment experiment only then discovers in the d

27、esign some kind of flaw. These instan</p><p>　　Recent year, the engineerig material choice already appeared importantly. In addition, the choice process should be to the material continuously the unceasing a

28、gain appraisal process. The new material unceasingly appears, but some original materials can obtain the quantity possibly can reduce. The environmental pollution, material recycling aspect and so on use, worker''

29、;s health and security frequently can attach the new limiting condition to the choice of material. In order to reduce the weight</p><p>　　Makes any product the first step of work all is designs. Designs usua

30、lly may divide into several explicit stages: (a) preliminary design; (b) functional design; (c) production design. In the preliminary design stage, the designer emphatically considered the product should have function. U

31、sually must conceive and consider several plans, then decided this kind of thought is whether feasible; If is feasible, then should makes the further improvement to or several plans. In this stage, the question </p>

32、;<p>　　In the functional design and the engineering design stage, needs to make a practical feasible design. Must draw up the quite complete blueprint in this stage, chooses and determines each kind of components

33、the material. Usually must make the prototype or the working model, and carries on the experiment to it, the appraisal product function, the reliability, the outward appearance and the service maintenance and so on. Alth

34、ough this kind of experiment possibly can indicate, enters in the product </p><p>　　n the production design stage, is should completely determine with the material related main question the material, causes

35、them to adapt with the existing equipment, can use the existing equipment economically to carry on the processing, moreover the material quantity can quite be easy to guarantee the supply. </p><p>　　In the m

36、anufacture process, inevitably can appear to uses the material to make some changes the situation. The experience indicated that, may use certain cheap materials to take the substitute. However, in the majority situation

37、, in will carry on the production later to change the material to have in to start before the production to change the price which the material will spend to have to be higher than. Completes the choice of material work

38、in the design stage, may avoid the most such situati</p><p>　　The product responsibility lawsuit forces designs the personnel and the company when the choice material, uses the best procedure. In the materia

39、l process, five most common questions are: (a) did not understand or cannot use about the material application aspect most newly the best information paper; (b) has not been able to foresee and to consider the dusk year

40、possible reasonable use (for example to have the possibility, designs the personnel also to be supposed further to forecast and the con</p><p>　　Through to the above five questions analysis, may obtain these

41、 questions is does not have the sufficient reason existence the conclusion. May for avoid these questions to these questions research analyses the appearance indicating the direction. Although uses the best choice of mat

42、erial method not to be able to avoid having the product responsibility lawsuit, designs the personnel and the industry carries on the choice of material according to the suitable procedure, may greatly reduce the lawsu&l

43、t;/p><p>　　May see from the above discussion, the choice material people should to the material nature, the characteristic and the processing method have comprehensive and the basic understanding.</p>&l

44、t;p><b>　　第二篇</b></p><p><b>　　機(jī)械設(shè)計(jì)理論</b></p><p>　　機(jī)械設(shè)計(jì)是一門通過設(shè)計(jì)新產(chǎn)品或者改進(jìn)老產(chǎn)品來滿足人類需求的應(yīng)用技術(shù)科學(xué)。它涉及工程技術(shù)的各個領(lǐng)域，主要研究產(chǎn)品的尺寸、形狀和詳細(xì)結(jié)構(gòu)的基本構(gòu)思，還要研究產(chǎn)品在制造、銷售和使用等方面的問題。</p><p>　　進(jìn)

45、行各種機(jī)械設(shè)計(jì)工作的人員通常被稱為設(shè)計(jì)人員或者機(jī)械設(shè)計(jì)工程師。機(jī)械設(shè)計(jì)是一項(xiàng)創(chuàng)造性的工作。設(shè)計(jì)工程師不僅在工作上要有創(chuàng)造性，還必須在機(jī)械制圖、運(yùn)動學(xué)、工程材料、材料力學(xué)和機(jī)械制造工藝學(xué)等方面具有深厚的基礎(chǔ)知識。 </p><p>　　如前所訴，機(jī)械設(shè)計(jì)的目的是生產(chǎn)能夠滿足人類需求的產(chǎn)品。發(fā)明、發(fā)現(xiàn)和科技知識本身并不一定能給人類帶來好處，只有當(dāng)它們被應(yīng)用在產(chǎn)品上才能產(chǎn)生效益。因而，應(yīng)該認(rèn)識到在一個特定的產(chǎn)品進(jìn)行設(shè)計(jì)

46、之前，必須先確定人們是否需要這種產(chǎn)品。</p><p>　　應(yīng)當(dāng)把機(jī)械設(shè)計(jì)看成是機(jī)械設(shè)計(jì)人員運(yùn)用創(chuàng)造性的才能進(jìn)行產(chǎn)品設(shè)計(jì)、系統(tǒng)分析和制定產(chǎn)品的制造工藝學(xué)的一個良機(jī)。掌握工程基礎(chǔ)知識要比熟記一些數(shù)據(jù)和公式更為重要。僅僅使用數(shù)據(jù)和公式是不足以在一個好的設(shè)計(jì)中做出所需的全部決定的。另一方面，應(yīng)該認(rèn)真精確的進(jìn)行所有運(yùn)算。例如，即使將一個小數(shù)點(diǎn)的位置放錯，也會使正確的設(shè)計(jì)變成錯誤的。</p><p>

47、;　　一個好的設(shè)計(jì)人員應(yīng)該勇于提出新的想法，而且愿意承擔(dān)一定的風(fēng)險(xiǎn)，當(dāng)新的方法不適用時(shí)，就使用原來的方法。因此，設(shè)計(jì)人員必須要有耐心，因?yàn)?所花費(fèi)的時(shí)間和努力并不能保證帶來成功。一個全新的設(shè)計(jì)，要求屏棄許多陳舊的，為人們所熟知的方法。由于許多人墨守成規(guī)，這樣做并不是一件容易的事。一位機(jī)械設(shè)計(jì)師應(yīng)該不斷地探索改進(jìn)現(xiàn)有的產(chǎn)品的方法，在此過程中應(yīng)該認(rèn)真選擇原有的、經(jīng)過驗(yàn)證的設(shè)計(jì)原理，將其與未經(jīng)過驗(yàn)證的新觀念結(jié)合起來。</p>&

48、lt;p>　　新設(shè)計(jì)本身會有許多缺陷和未能預(yù)料的問題發(fā)生，只有當(dāng)這些缺陷和問題被解決之后，才能體現(xiàn)出新產(chǎn)品的優(yōu)越性。因此，一個性能優(yōu)越的產(chǎn)品誕生的同時(shí)，也伴隨著較高的風(fēng)險(xiǎn)。應(yīng)該強(qiáng)調(diào)的是，如果設(shè)計(jì)本身不要求采用全新的方法，就沒有必要僅僅為了變革的目的而采用新方法。</p><p>　　在設(shè)計(jì)的初始階段，應(yīng)該允許設(shè)計(jì)人員充分發(fā)揮創(chuàng)造性，不受各種約束。即使產(chǎn)生了許多不切實(shí)際的想法，也會在設(shè)計(jì)的早期，即繪制圖紙之前

49、被改正掉。只有這樣，才不致于堵塞創(chuàng)新的思路。通常，要提出幾套設(shè)計(jì)方案，然后加以比較。很有可能在最后選定的方案中，采用了某些未被接受的方案中的一些想法。 </p><p>　　心理學(xué)家經(jīng)常談?wù)撊绾问谷藗冞m應(yīng)他們所操作的機(jī)器。設(shè)計(jì)人員的基本職責(zé)是努力使機(jī)器來適應(yīng)人們。這并不是一項(xiàng)容易的工作，因?yàn)閷?shí)際上并不存在著一個對所有人來說都是最優(yōu)的操作范圍和操作過程。</p><p>　　另一個重要問題，

50、設(shè)計(jì)工程師必須能夠同其他有關(guān)人員進(jìn)行交流和磋商。在開始階段，設(shè)計(jì)人員必須就初步設(shè)計(jì)同管理人員進(jìn)行交流和磋商，并得到批準(zhǔn)。這一般是通過口頭討論，草圖和文字材料進(jìn)行的。為了進(jìn)行有效的交流 ，需要解決下列問題：</p><p>　　（1） 所設(shè)計(jì)的這個產(chǎn)品是否真正為人們所需要？</p><p>　　（2） 此產(chǎn)品與其他公司的現(xiàn)有同類產(chǎn)品相比有無競爭能力？</p><p>

51、;　?。?） 生產(chǎn)這種產(chǎn)品是否經(jīng)濟(jì)？</p><p>　?。?） 產(chǎn)品的維修是否方便？</p><p>　?。?） 產(chǎn)品有無銷路？是否可以盈利？ </p><p>　　只有時(shí)間能對上述問題給出正確答案。但是， 產(chǎn)品的設(shè)計(jì)、制造和銷售只能在對上述問題的初步肯定答案的基礎(chǔ)上進(jìn)行。設(shè)計(jì)工程師還應(yīng)該通過零件圖和裝配圖，與制造部門一起對最終設(shè)計(jì)方案進(jìn)行磋商。</p>

52、;<p>　　通常 ，在制造過程中會出現(xiàn)某個問題。可能會要求對某個零件尺寸或公差作一些更改，使零件的生產(chǎn)變得容易。但是，工程上的更改必須要經(jīng)過設(shè)計(jì)人員批準(zhǔn)，以保證不會損傷產(chǎn)品的功能。有時(shí)，在產(chǎn)品的裝配時(shí)或者裝箱外運(yùn)前的試驗(yàn)中才發(fā)現(xiàn)設(shè)計(jì)中的某種缺陷。這些事例恰好說明了設(shè)計(jì)是一個動態(tài)過程。總是存在著更好的方法來完成設(shè)計(jì)工作，設(shè)計(jì)人員應(yīng)該不斷努力，尋找這些更好的方法。</p><p>　　近些年來，工程材

53、料的選擇已經(jīng)顯得重要。此外，選擇過程應(yīng)該是一個對材料的連續(xù)不斷的重新評價(jià)過程。新材料不斷出現(xiàn)，而一些原有的材料的能夠獲得的數(shù)量可能會減少。環(huán)境污染、材料的回收利用、工人的健康及安全等方面經(jīng)常會對材料選擇附加新的限制條件。為了減輕重量或者節(jié)約能源，可能會要求使用不同的材料。來自國內(nèi)和國際競爭、對產(chǎn)品維修保養(yǎng)方便性要求的提高和顧客的反饋等方面的壓力，都會促使人們對材料進(jìn)行重新評價(jià)。由于材料選用不當(dāng)造成的產(chǎn)品責(zé)任訴訟，已經(jīng)產(chǎn)生了深刻的影響。此

54、外，材料與材料加工之間的相互依賴關(guān)系已經(jīng)被人們認(rèn)識得更清楚。因此，為了能在合理的成本和確保質(zhì)量的前提下獲得滿意的結(jié)果，設(shè)計(jì)工程師的制造工程師都必須認(rèn)真仔細(xì)地選擇、確定和使用材料。</p><p>　　制造任何產(chǎn)品的第一步工作都是設(shè)計(jì)。設(shè)計(jì)通?？梢苑譃閹讉€明確的階段：（a）初步設(shè)計(jì)；（b）功能設(shè)計(jì)；（c）生產(chǎn)設(shè)計(jì)。在初步設(shè)計(jì)階段，設(shè)計(jì)者著重考慮產(chǎn)品應(yīng)該具有的功能。通常要設(shè)想和考慮幾個方案，然后決定這種思想是否可行；

55、如果可行，則應(yīng)該對其中一個或幾個方案作進(jìn)一步的改進(jìn)。在此階段，關(guān)于材料選擇唯一要考慮的問題是：是否有性能符合要求的材料可供選擇；如果沒有的話，是否有較大的把握在成本和時(shí)間都允許的限度內(nèi)研制出一種新材料。</p><p>　　在功能設(shè)計(jì)和工程設(shè)計(jì)階段，要做出一個切實(shí)可行的設(shè)計(jì)。在這個階段要繪制出相當(dāng)完整的圖紙，選擇并確定各種零件的材料。通常要制造出樣機(jī)或者實(shí)物模型，并對其進(jìn)行試驗(yàn)，評價(jià)產(chǎn)品的功能、可靠性、外觀和維修

56、保養(yǎng)性等。雖然這種試驗(yàn)可能會表明，在產(chǎn)品進(jìn)入到生產(chǎn)階段之前，應(yīng)該更換某些材料，但是，絕對不能將這一點(diǎn)作為不認(rèn)真選擇材料的借口。應(yīng)該結(jié)合產(chǎn)品的功能，認(rèn)真仔細(xì)地考慮產(chǎn)品的外觀、成本和可靠性。一個很有成就的公司在制造所有的樣機(jī)時(shí)，所選用的材料應(yīng)該和其生產(chǎn)中使用的材料相同，并盡可能使用同樣的制造技術(shù)。這樣對公司是很有好處的。功能完備的樣機(jī)如果不能根據(jù)預(yù)期的銷售量經(jīng)濟(jì)地制造出來，或者是樣機(jī)與正式生產(chǎn)的裝置在質(zhì)量和可靠性方面有很大不同，則這種樣機(jī)就

57、沒有多大的價(jià)值。設(shè)計(jì)工程師最好能在這一階段完全完成材料的分析、選擇和確定工作，而不是將其留到生產(chǎn)設(shè)計(jì)階段去做。因?yàn)椋谏a(chǎn)設(shè)計(jì)階段材料的更換是由其他人進(jìn)行的，這些人對產(chǎn)品的所有功能的了解不如設(shè)計(jì)工程師。 </p><p>　　在生產(chǎn)設(shè)計(jì)階段中，與材料有關(guān)的主要問題是應(yīng)該把材料完全確定下來，使它們與現(xiàn)有的設(shè)備相適應(yīng)，能夠利用現(xiàn)有設(shè)備經(jīng)濟(jì)地進(jìn)行加工，而且材料的數(shù)量能夠比較容易保證供應(yīng)。</p><

58、p>　　在制造過程中，不可避免地會出現(xiàn)對使用中的材料做一些更改的情況。經(jīng)驗(yàn)表明，可采用某些便宜材料作為替代品。然而，在大多數(shù)情況下，在進(jìn)行生產(chǎn)以后改換材料要比在開始生產(chǎn)前改換材料所花費(fèi)的代價(jià)要高。在設(shè)計(jì)階段做好材料選擇工作，可以避免多數(shù)這樣的情況。在生產(chǎn)制造開始后出現(xiàn)了可供使用的新材料是更換材料的最常見的原因。當(dāng)然，這些新材料可能降低成本、改進(jìn)產(chǎn)品的性能。但是，必須對新材料進(jìn)行認(rèn)真的評價(jià)，以確保其所有性能都滿足要求。應(yīng)當(dāng)記住，新材

59、料的性能和可靠性很少像現(xiàn)有材料那樣為人們所了解。大部分的產(chǎn)品失效和產(chǎn)品責(zé)任事故案件是由于在選用新材料作為替代材料之前，沒有真正了解它們的長期使用性能而引起的。</p><p>　　產(chǎn)品的責(zé)任訴訟迫使設(shè)計(jì)人員和公司在選擇材料時(shí)，采用最好的程序。在材料過程中，五個最常見的問題為：（a）不了解或者不會使用關(guān)于材料應(yīng)用方面的最新最好的信息資料；(b)未能預(yù)見和考慮擦黑年品可能的合理用途（如有可能，設(shè)計(jì)人員還應(yīng)進(jìn)一步預(yù)測和

60、考慮由于產(chǎn)品使用方法不當(dāng)造成的后果。在近年來的許多產(chǎn)品責(zé)任訴訟案件中，由于錯誤地使用產(chǎn)品而受到傷害的原告控告生產(chǎn)廠家，并且贏得判決）；(c)所使用的材料的數(shù)據(jù)不全或是有些數(shù)據(jù)不確定，尤其是當(dāng)其長期性能數(shù)據(jù)是如此的時(shí)候；(d)質(zhì)量控制方法不適當(dāng)和未經(jīng)驗(yàn)證；(e)由一些完全不稱職的人員選擇材料。</p><p>　　通過對上述五個問題的分析，可以得出這些問題是沒有充分理由存在的結(jié)論。對這些問題的研究分析可以為避免這些