数控技术双语4PPT文件格式下载.ppt

1、ElectromechanicalEngineeringCollegeElectromechanicalEngineeringCollegeHenanHenanUniversityofScienceandTechnologyUniversityofScienceandTechnologyNUMERICALCONTROLTECHNOLOGYNUMERICALCONTROLTECHNOLOGY韩建海1 1数控技术 C Ch ha ap pt te er r 4 4 C CNNC C UUn ni it tChapter4 COMPUTERNUMERICALCONTROLUNIT4.1、Introd

2、uction 4.2、Hardware Architecture of CNC Unit4.3、CNC System Software4.4、PLC functions in CNC Unit4.5、Human-Machine Interface and Operation Sequence of CNC System4.6、Open Architecture System for CNC Unit2 2数控技术 C Ch ha ap pt te er r 4 4 C CNNC C UUn ni it tChapter4 COMPUTERNUMERICALCONTROLUNIT Today,c

3、omputer numerical control（CNC）Today,computer numerical control（CNC）machines are found almost everywhere,from machines are found almost everywhere,from small job shops in rural communities to small job shops in rural communities to Fortune 500 companies in large urban areas.Fortune 500 companies in l

4、arge urban areas.Truly,there is hardly a facet of Truly,there is hardly a facet of manufacturing that is not in some way manufacturing that is not in some way touched by what these innovative machine can touched by what these innovative machine can do.Everyone involved in the manufacturing do.Everyo

5、ne involved in the manufacturing environment should be well aware of what is environment should be well aware of what is possible with these sophisticated tools.possible with these sophisticated tools.3 3数控技术 C Ch ha ap pt te er r 4 4 C CNNC C UUn ni it tChapter4 COMPUTERNUMERICALCONTROLUNIT In this

6、 chapter,we will explore the basics of In this chapter,we will explore the basics of the core of CNC machine tool the core of CNC machine tool CNC unit,showing you CNC unit,showing you much of what is involved with its functions,working much of what is involved with its functions,working principles,

7、hardware configuration and software principles,hardware configuration and software structure.With so many types of CNC machine tools structure.With so many types of CNC machine tools and CNC units in existence,it is next to impossible and CNC units in existence,it is next to impossible for this chap

8、ter to be extremely specific about any for this chapter to be extremely specific about any one particular type.The key concepts allow us to one particular type.The key concepts allow us to view the main features of CNC unit in more general view the main features of CNC unit in more general terms,str

9、essing why things are handled the way they terms,stressing why things are handled the way they are even more than the specific techniques used with are even more than the specific techniques used with any one particular CNC machine tool.With this broad any one particular CNC machine tool.With this b

10、road background,you should be easily zero in on any kind background,you should be easily zero in on any kind of CNC machine tool you will be working with.of CNC machine tool you will be working with.4 4数控技术 C Ch ha ap pt te er r 4 4 C CNNC C UUn ni it tChapter4 COMPUTERNUMERICALCONTROLUNIT4.1、Introd

11、uction Machine controls are divided into two types:#Machine controls are divided into two types:#numerical control（NC）and computer numerical numerical control（NC）and computer numerical control（CNC）.NC controls have to read the program control（CNC）.NC controls have to read the program each time a par

12、t is run;#they have no means of each time a part is run;#they have no means of editing existing programs.CNC controls can store editing existing programs.CNC controls can store and allow editing of loaded programs.All machines and allow editing of loaded programs.All machines built today are CNC mac

13、hines.CNC unit is the heart built today are CNC machines.CNC unit is the heart of CNC machine.Nevertheless,in order to aid to of CNC machine.Nevertheless,in order to aid to understand the working principles of CNC unit,it understand the working principles of CNC unit,it is necessary that the princip

14、les of NC system be is necessary that the principles of NC system be introduced firstly.introduced firstly.5 5数控技术 C Ch ha ap pt te er r 4 4 C CNNC C UUn ni it tChapter4 COMPUTERNUMERICALCONTROLUNIT4.1、Introduction TheNCmachinecanbedividedintothreebasicareas.Thefirstareaisthecontrolunit,whichprocess

15、esthecommandfromtheinputmedia.Thesecondareaisthedrivemechanisms,andthelastareaisthemachineitself.4.1.1NCsystem6 6数控技术 C Ch ha ap pt te er r 4 4 C CNNC C UUn ni it tChapter4 COMPUTERNUMERICALCONTROLUNIT4.1、Introduction The most basic function of any NC machine The most basic function of any NC machin

16、e is automatic,precise,and consistent motion is automatic,precise,and consistent motion control.All forms of NC equipment have two control.All forms of NC equipment have two or more directions of motion,called axes.or more directions of motion,called axes.These axes can be precisely and automatically These axes can be precisely and automatically positioned along their lengths of travel.The positioned along their lengths of travel.The two most common axis types are linear（driven two most common axis