機械英漢翻譯-機械設計概論-文庫吧資料
2025-01-18 05:42本頁面
【正文】 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 and must decide what old， proven concepts should be used and what new， untried ideas should be incorporated． New designs generally have “bugs” or unforeseen problems which must be worked out before the superior characteristics of the new designs can be enjoyed. Thus there is a chance for a superior product． but only at higher risk． It should be emphasized that， if a design does not warrant 2 radical new methods， such methods should not be applied merely for the sake of change． During the beginning stages of design， creativity should be allowed to flourish without a great number of constraints． Even though many impractical ideas may arise， it is usually easy to eliminate them in the early stages of design before firm details are required by manufacturing． In this way， innovative ideas are not inhibited． Quite often， more than one design is developed，up to the point where they call be pared against each other． It is entirely possi
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