数控技术英语Unit7

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1、单击此处编辑母版标题样式,,单击此处编辑母版文本样式,,第二级,,第三级,,第四级,,第五级,,*,,*,Unit 7 Can You Write an NC Program?,第,7,单元 你能编写数控程序吗？,,Introduction,When students are at school, they all know more and more machines are now controlled by computers. How can the computers direct the machines? Today they will follow Lisa to find i

2、t out.,,当学生们在学校时，他们都知道越来越多的机床被计算机控制。计算机是怎样控制机床的？今天他们会跟随丽莎去找到答案。,calculation,[,kælkjə`leɪʃən] n.,计算,,define,[di`fain] v.,下定义,,geometry,[dʒi`ɔmitri] n.,几何,,trim,[trim] v.,修剪,,manual programming,手工编程,,computer-assisted programming,计算机辅助编程,,complicated,[`kɔmplikeitid] adj.,复杂的,,plot,[plɔt] n.,图表，曲线,

3、,machining cycle,加工循环,,Word Address Format,字地址格式,block,[blɔk] n.,程序段,,element,[`elimənt] n.,要素,,prefix,[`pri:fiks] v.,把,…,放在前,,character,[`kæriktə] n.,字符,,convey,[kən`vei] v.,传送,,register,[`redʒistə] n.,寄存器,,sequence,[`si:kwəns] n.,顺序,,label,[`leibəl] v.,标注,,drill,[dril] v.,钻孔,,parameter,[p

4、ə`ræmitə] n.,参数,,miscellaneous function address,辅助功能地址,Listen and divide,The advantages of CAM system programming:,,,B.,程序员无需做数学计算。,,C.,提供一些基本的加工程序。,,E.,能用同一基本语言为不同的机床编程。,Three basic steps to CAM system programming:,,,A.,程序员必须提供一般信息。,,D.,定义加工操作,,F.,工件的几何形状必须被定义并被修整以符合工件形状。,Look and write,m,a,n,u,a

5、l labor,,,co,m,puter-a,s,si,s,ted programming,,,co,rr,ect,Listen and repeat,Lisa is introducing the students to the programmer in the company.,,丽莎正在将学生们介绍给公司的程序员。,,Lisa: This is Sam, the programmer. Sam, they are the interns.,,丽莎：这位是山姆，程序员。山姆，他们是实习生。,,Students: Pleased to meet you.,,学生们,:,很高兴认识你。,,S

6、am: Pleased to meet you too.,,山姆：也很高兴认识你们。,,Jack: Is it difficult to write a program?,,杰克：编写程序难吗？,,Sam: That depends.,,山姆：看具体情况。,,David: What types of program do you usually write?,,大卫：你通常会写哪种类型的程序？,,Sam: There are mainly two types of programming, manual and computer-assisted.,,山姆：主要有两种程序，手工和计算机辅助。,

7、,David: What is manual programming?,,大卫：什么是手工编程？,,,Sam: It means the programmer prepares the program and input it to the NC system.,,山姆：它是指程序员准备好程序，并将程序输入数控系统。,,Jack: How about computer-assisted programming?,,杰克：计算机辅助编程怎么样？,,Sam: It’s different from manual programming. After the programmer inputs si

8、mple instruction, the computer creates the program.,,山姆：它跟手工编程不同。在程序员输入简单指令后，计算机自动生成程序。,,Students: We see. Thank you!,,学生们：我们明白了。谢谢！,Listen and choose,Mike: May I ask you what you are doing now?,,麦克：我能问一下你在做什么吗,,Sam: Yes. I’m developing a manual program of the machining cycle.,,山姆：可以。我在写一个加工循环的手工程序。

9、,,Mike: A manual program? Why don’t you use CAM system programs?,,麦克：手工程序？为什么不用计算机辅助制造（,CAM,）系统程序,Sam: Well, this work is simple and only a few machine tools are used, a manual program is enough.,,山姆：嗯，这个工作很简单，只用到几个刀具，手工程序足够了。,,Mike: Does it mean CAM system programs will be used in more complicated

10、work?,,麦克：这是否意味着计算机辅助制造系统程序将在更复杂的工作中使用？,,Sam: Generally speaking, yes.,,山姆：一般来说，是的。,,Mike: What is that man doing? is he creating programs?,,麦克：那个人在做什么？他在写程序吗？,Sam: Yes. He is creating a program at the CNC machine. This is called conversational programming. The programmer will see whether various in

11、puts are correct. When finished, the programmer may see a tool path plot of what will happen during the machining cycle.,,山姆：是的。他在数控机床上写程序。这叫会话式编程。程序员会看到各种输入是否正确。结束后，程序员可能会看到加工循环过程中的刀具路径图。,,Mike: Wow. It’s amazing.,,麦克：哇，真神奇。,Word Address Format,The entire information about an operation is called a

12、block. There are 3 types of formats for representing the block——Fixed sequential Format, Word address format, and Tab Sequential Format.,,一个操作的完整信息叫做程序段。程序段有三种格式：固定顺序格式，字地址格式，分隔符顺序格式。,,Word Address Format is mostly used. In this format, each element of information is prefixed by a letter. And the co

13、ntroller conveys the letter to a particular register.,,字地址格式最常用。在这种格式中，每个信息元素前面带有一个字母。控制器将这个字母转到特定寄存器。,Sequence is not necessary in this format because all information is labeled by a letter. Repetition is not necessary either since the controller can take it from the earlier block.,,在这个格式中顺序是不必要的，因

14、为所有信息都用字母标记了。也不需要重复，因为控制器能从前面的程序段获取需要的信息。,,This will help the programmer not to make mistakes and shorten the program. This will also save time in preparing the program. An example of this type is as follows:,,这能帮助程序员不犯错和缩短程序。这也可以节约编程的时间。这种程序例子如下,:,,N37 G81 X0 Y0 Z50000 S5000 F100 M03*,,N38 X100 Y10

15、0*,,,In this example, G81 means to drill. The other necessary parameters for carrying out the operation would follow.,,在这个例子中，,G81,表示钻孔。执行操作所需的其他必要参数跟着后面。,,The following are the letter addresses used in programming:,,下面是程序中的字地址：,,N Operation sequence number address,,,操作顺序数字地址,,G Preparatory functio

16、n address,,准备功能地址,,X, Y, Z, A, B, C, … Dimension address,,尺寸地址,,S Spindle speed address,,主轴转速地址,,T Tool address,,刀具地址,,M Miscellaneous function address,,辅助功能地址,,①,开头是程序段的序号，以字母,N,和四位数字表示；接着一般是准备功能指令，由字母,G,和两位数字组成；,,②,机床运动的目标坐标值,，,如用Ｘ、Ｙ、Ｚ等指定运动坐标值；,,③,工艺性指令，,F,代码为进给速度指令，,S,代码为主轴转速指令，,T,为刀具号指令，,M,代码为辅助

17、机能指令。,,④ LF,为,ISO,标准中的程序段结束符号（在,EIA,标准中为,CR,，在某些数控系统中，程序段结束符用符号,“*”,或,“,；,”,表示）。,词缀,en,的用法,en- + rich (adj.),→,enrich(v.),,en- + large (adj.),→,enlarge(v.),,dark(adj.) + -en,→,darken(v.),,short(adj.) + -en,→,shorten(v.),,en,作前缀或后缀表“变成，使成为”，放在形容词前或后使之转化为动词。,课后练习,,Ⅰ,判断，改错,,1. The entire information ab

18、out an operation is called a block.,,2. Yes.,,3. Yes.,,4. Sequence is not necessary in this format because all information is labeled by a letter.,,5. Yes.,,Ⅱ,填表,,,,N,Operation sequence number address,G,Preparatory function address,X, Y, Z, A, B, C, …,Dimension address,S,Spindle speed address,T,Tool address,M,Miscellaneous function address,Ⅲ,,1. No,,2. Yes,,3. Yes,,4. Yes,,Ⅳ,,1. drill,,2. block,,3. conveyed,,4. label,