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1、English on Application of Numerical Control Technology,数控技术应用专业英语,素材均来自国外企业数控技术工程资料和高校参考资料,1,全方位紧密结合数控技术应用知识和技能,2,按照企业典型工作任务流程和学习认知过程编排,3,学习数控技术常规专业知识及数控新技术发展,4,重点放在阅读理解、专业词汇积累和书面翻译上,5,辅以强调听、说能力学习以加强对课文的记忆和理解,6,熟悉专业文章、工程资料和操作手册的英文表达,1,积累专业词汇，阅读和应用原文资料的能力,2,3,拓宽数控技术方面涉外知识,4,补充模具设计与制造技术、机电一体化技术、智能制造,5
2、,为对外技术、业务交流打下专业外语基础,Text,New word,Notes,Exercises,Vocabulary,Translation,Text,Text 1 Historical Development of NC Numerical control of machine tools was first developed between 1947 and 1952 following World War II at the Massachusetts institute of technology (MIT).,The development of numerical contr
3、ol owes much to the United States Air Force, which recognized the need to develop more efficient manufacturing methods for producing very accurately sized and intricately shaped parts for modern aircraft, principally space vehicles. Most of the machining involved milling operations, so the Air Force
4、 sponsored a research project at MIT to develop a prototype NC milling machine. This prototype was produced by retrofitting a conventional tracer mill with numerical control servomechanisms for the three axes of the machine. In March 1952, the MIT Labs held the first demonstration of the NC machine.
5、 Also, certain industry users, especially airframe builders worked to devise numerical control machines to satisfy their own particular production needs.,The Air Force continued its encouragement of NC development by sponsoring additional research at MIT to produce a curve. It led to the development
6、 in 1959 of the Automatically Programmed Tools (APT) language. This is a special programming language for NC that used statements similar to English language to define the part geometry, describe the cutting tool configuration, and specify the necessary motions. The instructional programs were writt
7、en on punched paper. But the new problem was the fragility of the punched paper tape that was likely to be broken or torn during a machining process. It was later replaced by magnetic plastic tape as shown in Fig. 1-1. The plastic tape carried the instructions as a series of magnetic dots and was mu
8、ch stronger than the paper tape.,However, it still left two other problems. It was difficult or impossible to change the instructions entered on the tape. To make even the most minor adjustments in a program of instructions, it was necessary to interrupt machining operations and make a new tape. It
9、was still necessary to run the tape through the reader, as many times as there were parts to be produced. Fortunately, computer technology became a reality and soon solved the problems of NC associated with punched paper and plastic tape in 1970s.,Text,New word,Notes,Exercises,Vocabulary,Translation
10、,New words and phrases,Text,New word,Notes,Exercises,Vocabulary,Translation,PART1,PART2,Notes,1. owe to 归功于 principally 副词，主要地 例句：The development of numerical control owes much to the United States Air Force, which recognized the need to develop more efficient manufacturing methods for producing ver
11、y accurately sized and intricately shaped parts for modern aircraft, principally space vehicles. (数控的发展得益于美国空军，他们意识到必须开发更加有效的制造方法为现代飞机，主要为航天飞行器生产尺寸精确而形状复杂的零件。) 例句：He owes his success more to luck than to ability. 例句：The dialect is spoken principally in the rural areas. (他将他的胜利更多地归功于运气而不是能力。) (这种方言流行
12、于农村。) 2. lead to 导致 例句：It led to the development in 1959 of the Automatically Programmed Tools (APT) language. 它导致了1959年自动编程刀具语言（APT）的发展。 例句：This mistake led to great confusion.(这个错误导致严重的混乱。),Text,New word,Notes,Exercises,Translation,Vocabulary,PART3,3. be likely to 可能的 例句：But the new problem was th
13、e fragility of the punched paper tape that was likely to be broken or tore during a machining process.(但是新问题是穿孔纸带脆弱，它很容易在加工过程中被撕破或者磨损。) 例句：It isnt likely to rain.(天不象要下雨。) 4. a series of 一系列 例句：The plastic tape carried the instructions as a series of magnetic dots and was much stronger than the pape
14、r tape.(塑料磁带通过一系列磁点来携带指令，并且比纸带要结实的多。) 例句：There is a whole series of accidents on this stretch of road recently. (在这条路上发生了一连串事故。) 5. associated with 过去分词短语 “与相关的” 例句：Fortunately, computer technology became a reality and soon solved the problems of NC associated with punched paper and plastic tape in
15、1970s. (幸运的是，在70年代，计算机技术成为了现实并很快地解决了与数控技术相关的穿孔纸带和磁带的问题。) 例句：I wouldnt want to be associated with McKeys project. (我不想涉入米奇的项目。),Notes,Text,New word,Notes,Exercises,Vocabulary,Translation,PART4,Exercises,I. Write True or False beside the following statements about the text. 1. It is reported that nume
16、rical control of machine tools was first developed several years after the World War II in the United States. 2. In early 1952, the MIT Labs held the first demonstration of the NC machine. 3. It was the United States Air Force that led to the development in 1959 of the Automatically Programmed Tools (APT) language. 4. The instructional programs were firstly written on magnetic plastic tape, then
