外文翻译Thenumericalcontroltechnology毕业论文

1、 PAGE27 / NUMPAGES27外文翻译 eq oac(,1)The numerical control technologyNumerical control technology is refers with digital, the writing and the mark composition digital command realizes one or the multi-Taiwan mechanical device movement control technology.It controls usually is the position, the angle,

2、the speed and so on the mechanical quantity and flows to the related switch quantity with the mechanical energy.The numerical control production relies on data carrier and the binary mode data operation appearance.In 1908, perforation sheet metal exchange type data carrier being published; 19 centur

3、ys ends, and have the assistance function control system take the paper as the data carrier to invent; In 1938, Shannon has carried on the data fast operation and the transmission in the American Massachusetts Institute of Technology, has established the modern computer, including computer numerical

4、 control system foundation.The numerical control technology is develops with the engine bed control close union.In 1952, first numerical control engine bed being published, became in the world mechanical industry history an epoch-making event, impelled the automated development. Because uses the com

5、puter substitution originally to use the numerical control installment which the hardware logic circuit composes, causes the data-in the storage, processing, the operation, the logical judgment and so on each kind of control function realization, may complete through the computer software. The numer

6、ical control engine bed is one kind of technical denseness and the automaticity very high integration of machinery processing equipment, is synthesizes the application computer, the automatic control, the automatic detection and preciseThe processing precision is high, the quality easy to guarantee,

7、 the prospects for development are extremely broad, therefore the grasping numerical control lathe processing programming technology especially is important.Now, the numerical control technology also is called the computer numerical control technology, at present it is uses the computer realization

8、digital process control the technology.This kind of technology according to the control procedure which stores beforehand carries out with the computer to the equipment the control function.eq oac(,2)Machine tool numerical control system1 .Applies PC resource broadlyThe microcomputer the personal co

9、mputer (PC) is called in recent years develops very quickly , the large-scale integrated circuit makes the technology high speed sending out speed , feasible PC hardware structure composes very small. Host CPU operation speed is more and more high. The IPC386 basic frequency is 33 MHz , IPC486 , 586

10、s basic frequency may amount to 50 120 MHz, recently Intel gallop the processor (Pentium) , basic frequency already amount to 450 MHz. Memory capacities are also very big , volume is very small, since being that mass production , messenger cost come down , reliability improves.That in development of

11、 software aspect, OS, the Windows application, feasible PC operation are simpler and convenient especially is penetrating. From minitype, machine , the workstation build the CAD/CAM software in large amount to PC transplanting , Sanweitu display and handicraft data base on PC. The opening to the out

12、side world plus PC , the technician who attracts a great quantity have thrown into the software exploitation , feasible PC software resource has enriched extremely.2. Miniaturizes to satisfy the integration of machinery with electronics requestWith the development of microelectronics technology, the

13、 large-scale integrated circuit integration level is more and more high , volume is more and more small. The numerical control equipment factory adopt grand scale IC and adopt the surface installation handicraft (SMT), have realized three-dimensional body assembling , have equipped entire CNC with t

14、he request composing very small, to adapt to machinery manufacturing industry integration of machinery with electronics.3.Improves man-machine interface , convenience of customers is put into useFor making operation person can handle very easy to have numerical control machine tool in hand, the nume

15、rical control equipment childbirth factory effort field improves man-machine interface , facilitates a programming , adopt an interactive mode to the full , makes a consumer be put into use going to the lavatory, if the Spain FAGOR company gives birth to a child FAGOR 8050 series , the editors who a

16、dopt the each other dyadic editor program to guide system , simplification procedure, use the brief table editor program , make use of a blueprint to build procedure. Whose 8050 TC type numerical control system, has been called (FAGOR800 series CNC system) dyadic top grade fool numerical control sys

17、tem , whose operation face ply has been used the sign key , the consumer can according to what be needed the queen who processes a part , chooses a job gram , imports the artwork data, be OK to realize semi-automatic or full-automatic treating. The various automation operation is not all elected if

18、the face ply is upper, location value and chief axis rotation rate being CNC systems turn to demonstrate a coordinate axis only, each axes handling person being able to use the sway a handle or electronic hand wheel to the machine tool carry out manual operation , are put into use going to the lavat

19、ory extremely.4 .Raises numerical control system product complete setNumerical control system includes the CNC device , the chief axis and feeds the servo driving device, and as well as the chief axis electric motor, feeds an electric motor than pertinent detecting couples back a component. A numeri

20、cal control system function goodness and badness is that the function is closely related to as said or narrated above each links. For the need satisfying the machine tool consumer factory, the numerical control equipment childbirth factory takes numerical control product complete set seriously all v

21、ery much , makes each systematic links can mate very good , makes a consumer gain best effect.5. Research and development intelligence type numerical control systemSo-called intelligence type numerical control system , morning are in the eighties initial stage already begin to study. FS15 series tha

22、t the FANUC company debuted at that time, will be called AI (artificial intelligence) CNC system , be been to have adopt the expert system in the field of malfunction diagnose mainly. System makes use of so-called reasoning software , analyses and seeks malfunction cause according to the experience

23、storing in knowledge base in system. The nearest FANUC company goes to in the childbirth system being carried out quilt being called problem IMS (Intelligent Manufacturing Systems) being oriented toward the 21st century , will be technology of world range experienced worker key (Know how) combinatio

24、n be carried out seamlessly (Seamless).Subsequently industrial technology desire for development, fabrication process quicker, easier, use fit in with give birth to a child need, one kind be called intelligence closed cycle treating (Intelligent Closed-Loop Processes ICLP) technology adopt. This tec

25、hnology is to make use of a sensor to gain timely information, to strengthen a maker getting the best product ability. Pursue 1 it is intelligence closed cycle to process a model.6 .Needs the numerical control product good for sale , develops according to the marketplaceThe high and new technology i

26、s a direction that numerical control system develops , the product developing numerical control good for sale on the other hand is also to adapt to the need that the marketplace develops. Our country is the developing country , economy type numerical control system has the vast marketplace in our co

27、untry. The cheap numerical control system therefore, developing high performance , price, satisfies our country marketplace needing to be a highly significants. At present, economy of our country type numerical control machine tool needs amounts to be 8000 10000 platforms about every year. Be also v

28、ery cheap though having several tens manufacturers to production be prices, the technology develops but slouly for many years, function and fairly have a few problem , unable satisfied reliability aspect marketplace need.7.Develops the new numerical control productWith the development of machinery p

29、rocessing technology, correct numerical control machine tool the function and satisfies these to come to adapt to demanding to need the product developing a few new integration of machinery with electronics numerical control more and more high , urgent demand.By the same token, move for realizing hi

30、gh speed , demand to develop the straight line electric motor , be used in drive working table linear motion directly. Straight line electric motor that the Japan FANUC company produces, displacement speed can reach 100 m/min. The Japanese THK company , German INDRAMAT company , SIEMENS company are

31、similar to a product all in developing and producing this.To sum up ,development of numerical control technology is that the technology develops need of developing productions synchro , being also basis at the same time but develop with the modern computer art , electron. Now the numerical control t

32、echnology is already mature , develops with expanding very much more quickly. Future CNC system will may make machinery easier to use , cheaper. eq oac(,3)Numerical Control of Production EquipmentFrom the scientific and commercial point of view，Digital control technology in the development of bulk p

33、rocessing in the manufacturing sector has a major achievement。It promotion and expansion of the NC technologies, including：Direct Digital Control Computer numerical controlDirect Digital ControlDirect digital control can be defined as many machines directly connected to the computer by real-time mon

34、itoring of the computer manufacturing system. DNC scallops readers were ignored, thereby increasing the reliability of the system. Part of the procedure to replace tapes from the computer memory card reader was sent to work directly in the machine.All in all, a computer can be controlled at least 10

35、0 or more different machines. (A commercial DNC system in 1970 that has been controlled during the 256 workstations capacity). DNC computer was designed to work on each machine to provide guidance, when machines need to control orders, they will immediately communicate with it.Figure 2-3 that the ge

36、neral structure of the DNC. System consists of four components. CPUs memory, storage, NC part of the process Signal Transmission WorkerWhen necessary, the computer from the data repository for a degree / instructions to work with machines, it also received at the same time work for feedback. This tw

37、o-way flow of data simultaneously, which means that each machine at the request of instructions will be immediately respond. Similarly, the computers have also always ready to accept information from the machines and to respond. DNC system is the outstanding characteristic of the real-time computer

38、always maintain a large number of separate machines work. Depend on the number of machines and the use of computing power, it sometimes become a satellite computer-assisted software. Figure 2.4 shows, these satellites are smaller computers, and they help the larger central computer sharing the task.

39、 Each computer individually controlled machines. Part of the procedure in order to receive and was stored in the central computer buffer, these instructions were sent to all the machines before. Feedback machines into a central computer data is first stored in the former buffer.(2) computer numerica

40、l controlSince DNC intervention, computer technology has changed dramatically, the actual size and digital computer lines have been obvious at the same time simplify the calculation of its capability has been substantially reinforced. In the digital control, the outcome of the traditional reception

41、in the NC MCU-based control units were replaced by digital computers. Initially small computer was used in 1970, and the further development of small computer, making todays micro-computer has replaced the small computer. Computer digital control is to use a mechanical control unit for the NC specia

42、lized micro-electronic system. CNC and DNC used a digital computer, because it can distinguish between the two different types of systems. These two systems are three main differences:DNC computer to transmit data to a large number of machines and receive data from, and CNC can only control one or a

43、 small number of machines.DNC computer can be remotely controlled, and the only short-range computer CNC control.DNC software not only as a single product to be developed, but also as an important manufacturing data management system. DNC software development work to increase the working capacity.Co

44、mputer digital control system versions such as the overall structure of Figure 2.5. Plans can be seen by Reading with control of access to the system for the first part, in this regard, computer numerical control system is similar to the traditional appearance of a digital control system However, th

45、e scheme used in computer numerical control system is different. in the traditional digital control system, through the perforated paper for the Reading with a working part of each volume cycle. Micro-program controller in a tape in the process, read, in the implementation of a pre-implementation of

46、 this one. In computer numerical control, the entire process once they are imported and stored in the computers memory. Machine for each part of the cycle is stored in the computer memory from the process control instead of the content of their tapes. Included in the computer control system to some

47、of the procedures introduced into the machine tool operations (or other processing equipment). Some features from the MCU circuit components in the hardware implementation. For example, the insertion of recycling often run by the hardware circuit rather than stored procedures. At the same time, hard

48、ware interface to the machine tool servo system to match.(3) characteristics of CNC control system In front of the machine control described in the digital control of the characteristics and importance. CNC common in the rigid procedures micro-controller functions by adding additional features. Some

49、 of these include the following:1) be able to store a number of procedures. With the progress of computer technology, many computer updated digital control system strong enough storage capacity to more single process. Such a change storage capacity to store a large number of procedures or short-or m

50、edium-size procedures. 2) the use of floppy disks. In the large-scale manufacturing sector, the process in the floppy disk usage on the rise. Capacity of the previous eight times. Equivalent to the capacity of a floppy disk or close to 8,000 feet long perforated paper. As more modern storage technol

51、ogy, many computer digital control system have a stronger ability to read stored in the floppy disk or perforated paper on the procedure.3) in the work of editing procedures. Procedures for the revision of some mistakes, CNC system allows the memory to modify procedures table. Therefore, the test pr

52、ocedure and makes machines that can read better than to return to the design room to amend scallops. Apart from the revised procedures, mechanical cutting cycle in the state which can be edited to achieve optimum cycle. Laws and procedures to achieve optimization, scallops perforation and to obtain

53、the edited version of scallops can be connected with the CNC controller.4) fixed cycle and design procedures. CNC enhanced control over the computer storage capacity and capabilities. That the frequent use of the storage processing cycle procedures can be visited from the list. Instead of a coding p

54、rocess to enter each table in the special directive was written into the schedule refers to the cycle be executed. Some cycles of operation, the need to set specific parameters. For example, a bolt hole, the bolt hole diameter hole in space, and other parameters must be specified. In other cases, sp

55、ecial processing parameter definition does not require processing cycle.5) interpolation. Some interpolation because of the requirements of the programme only in the implementation of a CNC system. To linear and circular interpolation, normally takes to access control unit. Spiral, and the square-sh

56、aped parabolic interpolation usually in a preservation program prepared to run.6) the importance of positioning equipment. For a specific work in the machine settings, including installation and proofreading work table fixture. In order to machine the workpiece spindle and alignment, which must be c

57、ompleted. Alignment of CNC system software to work its possible options to achieve specific characteristics. Been set by the location, operators need to determine the fixture table deviations. Machine Tool Spindle fixture will be the location for the creation of reference points, or reference plane

58、or in the workpiece fixture on the position.7) Tool length compensation. This is similar to the aforementioned features, but applicable to the work tool length and diameter. In the old design of the controller, tool size must be fully consistent with the definition of the procedures in the design pa

59、th. A path to ensure that the tool is designed with the requirements of the CNC controller. One of the ways is in the MCU in the importation of the actual size of the current tool, which may be the size of the initial preparation and the different procedures. Such compensation from the computer auto

60、matically calculate and adjust. Another new method is used in the machine tool length sensors. In this way, by connecting with the heart-axis sensors measuring the length of a compensation tool. The measurements will be used to correct procedures in the tool path.8) diagnosis. CNCC many modern machi