機(jī)械英漢翻譯-機(jī)械設(shè)計概論(已修改)
2025-01-24 05:42 本頁面
【正文】 1 原文 Introduction to Machine Design Machine design is the application of science and technology to devise new Or improved products for the purpose of satisfying human needs． It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size，shape and construction details， but also considers the various factors involved in the manufacture，marketing and use of the product． People who perform the various functions of machine design are typically called designers，or design engineers． Machine design is basically a creative activity． However， in addition to being innovative， a design engineer must also have a solid background in the areas of mechanical drawing， kinematics， dynamics, materials engineering, strength of materials and manufacturing processes. As stated previously， the purpose of machine design is to produce a product which will serve a need for man． Inventions， discoveries and scientific knowledge by themselves do not necessarily benefit people； only if they ale incorporated into a designed product will a benefit be derived． It should be recognized， therefore， that a human need must be identified before a particular product is designed． Machine design should be considered to be an opportunity to use innovative talents to envision a design of a product， to analyze the system and then make sound judgments on how the product is to be manufactured． It is important to understand the fundamentals of engineering rather than memorize mere facts and equations． There are no facts or equations which alone can be used to provide all the correct decisions required to produce a good design． On the other hand， any calculations made must be done with the utmost care and precision． For example， if a decimal point is misplaced， an otherwise acceptable design may not function． Good designs require trying new ideas and being willing to take a certain amount of risk，knowing that if the new idea does not work the existing method call be reinstated． Thus a designer must have patience ， since there is no assurance of success for the time and effort expended ． Creating a pletely new design generally requires that many old and well． established methods be thrust aside． This is not easy since many people cling to familiar ideas， techniques and attitudes． A design engineer should constantly search for ways to improve all existing product a
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