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1、翻译原文(英文) Mechanical Engineering English Lesson 1 Modern Manufacturing Engineering AWhat Is Manufacturing Maybe youve never thought about it before, but it is all around you. It affects every part of your life. What is it? In this case, “it” is manufacturing. A ctually “manufacturing” is not all arou
2、nd you. But manufactured products are. Look around you right now. Name some things you see that were manufactured. Chairs, notebooks, blue jeans, books, floor tile, chalkboards, light bulbs, pencils, eyeglassesnearly everything around you was manufactured. The manufacturing industry is important to
3、our society. Its essential to our economy. An economy is a system for producing and distributing products and services. Many people work in manufacturing. They help produce products. And they buy products with the money they earn. The more products people buy, the more products are manufactured. And
4、 this allows more people to work. Manufacturing is also important to the economy in another way. A piece of material is worth more after its been changed into a useful product. Thats added value. Value is inc reased by the manufacturing process. B. Modern Manufacturing A manufacturing industry needs
5、 three basic types of resources: Material resources, Human resources, Capital resources. The elements of industry are seven key steps for organizing production: Research and Development, Production Tooling, Production Planning and Control, Quality Control, Personnel Management, Manufacturing, Market
6、ing. R&D is the planning of new products, processes, or materials and the improvement of old skill. R&D is such a large, important part of the industrial world and requires many people with different talents. Production Tooling is the element of industry concerned with these tools. The PT obtains th
7、e tools, machines, and equipment needed to make a product. The most important parts of Production Planning and Control are routing, scheduling, dispatching, and plan layout.The machinery and equipment must be arranged so that production can take place smoothly, without wasted time and effort. Qualit
8、y Control can be defined as those activities which prevent defective articles. In this way management tries to insure that a product will be acceptable to the buyer. Marketing is the process of getting products from those who make them to those who use them and it helps to deliver the right kinds of
9、 goods to us, in the right form and amount, at the time and price. Lesson 2 Mechanical Engineering Design Mechanical engineering design is a major segment of engineering, it deals with the conception, design, development, refinement, and application of machines and mechanical apparatus of all kinds.
10、 For many students, mechanical engineering design is one of their first professional engineering courses. Professional engineering is concerned with obtaining solutions to practical problems, and the engineers are able to devise better solutions to practical problems. The most problems in mechanical
11、 engineering design do not have a single right answer. Hence, modern mechanical engineers are able to produce distinctly better solutions to meet todays needs. The engineer must use the best available scientific understanding together with empirical information, good judgment. When considering a com
12、plete machine, the engineer invariably finds that the requirements and constraints of the various components are interrelated.The modern engineer has become increasingly concerned with the broader considerations of safety, ecology, and overall “quality of life.” Good designs require trying new ideas
13、 and being willing to take a certain amount of risk, knowing that if the new idea does not work the existing method can be reinstated. Thus a designer must have patience, since there is no assurance of success for the time and effort expanded. Creating a completely new design generally requires that
14、 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 an existing product and must decide what old, proven concepts should be used and what new, untr
15、ied ideas should be incorporated. New designs generally have “bugs” or unforeseen problems which must be worked out before the superior characteristics of the new design 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
16、does not warrant 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
