宏程序在模块化加工技术中的应用

随着各类CAD／CAM软件的日益普及,自动编程慢慢有取代手工编程的趋势,但手工编程毕竟是基础,各种“疑难杂症”的解决往往还是要利用手工编程,且手工编程还可以使用变量编程,即宏程序。从模块化加工角度阐述了宏程序在模块化加工技术中的应用。     

数控铣床变量编程的应用

在数控加工程序编写中普通程序只能指定常量,常量之间不能计算,程序只能按照编写的顺序执行不能跳转,因此功能是固定的,不能变化。变量编程是用户提高数控机床性能和加工效率的一种特珠功能,在一些情况下巧用变量编程将起到事半功倍的效果。     

宏指令在数控编程加工中的应用

本文根据宏指令和cad/camd 在数控编程加工中的应用分析,分析其各自的特点;并通过典型零件的宏指令编程实例,说明利用宏指令编程对程序往往能起到化难为易、化繁为简的作用,使程序具有通用性、灵活性。恰当地使用宏变量,可用同一程序完成一个系列零件的加工,大大提高编程效率。     

固定循环数控指令的编程特点及工艺分析

该文以铣削型腔为例，通过用一般指令(G01)编程及用固定循环指令(G87、G88)编程两种方法比较，介绍了固定循环数控指令的编程与加工特点，阐述了循环指令在加工矩形槽及圆形槽的编程方法，详细分析了固定循环功能在数控铣床上的编程特点及加工工艺。     

宏程序在数控加工中的应用

数控加工程序中,普通的程序字一般为常量,常量之间不能运算,程序描述的只能是一个几何图形,功能是固定的,因此缺乏灵活性和适应性。与普通程序不同,用户宏程序能使用变量,给变量赋值,变量间可以运算,程序还可以跳转;在一些相似零件的加工中巧用宏程序可以提高编程的工作效率。     

椭圆弧面螺纹的参数化编程与加工

通过研究椭圆弧面螺纹的参数化编程与加工过程,介绍了利用SIEMENS系统提供的R参数指令编程功能编制出了具有通用性、适用性且应用简单的椭圆弧面螺纹的数控加工程序.使用时只需要在主程序中对相关变量进行赋值即可完成所需椭圆弧面螺纹的加工.     

椭球加工的两种数控编程方法及其比较

结合一个具有椭半球轮廓的工件，分别用用户宏程序编程和自动编程两种方法进行编程，并对两个数控程序进行了仿真加工和比较，最终得出两种编程方法各自的优缺点及其适用范围，为合理选择零件的数控编程方法提供参考。     

如何编制宠程序

用户宏程序是以变量的组合,通过算术和逻辑运算、转移和循环等命令,编制的一种可以灵活运用的程序,只要改变变量的值,即可以完成不同的加工和操作。用户宏程序可以简化编程,提高工作效率。     

数控系统用户宏程序的开发

数控系统的用户宏程序应用灵活,形式自由。具备计算机高级语言的表达式,逻辑运算及类似的程序流程。它将变量和演算式引入加工程序,并允许在加工程序中使用逻辑判断语句,使加工程序简练易懂,可实现普通编程难以实现的功能。     

如何编制宠程序

用户宏程序是以变量的组合,通过算术和逻辑运算、转移和循环等命令,编制的一种可以灵活运用的程序,只要改变变量的值,即可以完成不同的加工和操作。用户宏程序可以简化编程,提高工作效率。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.