On the transformation method of CNC machine tools_7443

1、On the transformation method of CNC machine toolsAbstract: With the development of science and technology, general machine tools are increasingly unable to meet the market demand, its labor intensity, high-risk, and mass production can not meet the needs of modern science, more and more companies wi

2、ll gradually shift the general machine tools NC, as CNC machine tools can compensate for many of the shortcomings of general machine tools, machining can be realized with high precision, multi-centralized processes, automatic alarm, automatic compensation and automatic monitoring functions. Describe

3、s how to transform CNC machine tools and made a numerical transformation of the issues and recommendations. Keywords: machine tool; NC; transformation             If used in the ordinary lathe and prolonged use of the lathe is not to reform

4、, only the purchase of new CNC lathe, will increase the number of manufacturers of equipment costs. Therefore, manufacturers and the prolonged use of ordinary lathe CNC lathe for transformation is the only way. In this talk about how to transform CNC lathe.        

5、     A transformation of CNC machine tools need to             Microscopic point of view, than the traditional CNC machine tools has the following outstanding advantages, but also some advantages from the numerical

6、control system are included in the power of the computer.             As the computer has superior computing power, you can accurately calculate the instantaneous axis of each instantaneous movement of the exercise should be, it can compoun

7、d into a complex curve or surface.             Automated processing can be achieved, and flexible automation to increase efficiency than traditional machines 3 7 times.             

8、;As the computer has a memory and storage capacity, you can enter the program to remember and storage down, and then automatically according to the procedure provided for in order to carry out in order to achieve automation. CNC machine tools as long as the replacement of a program, you can realize

9、the automation of another workpiece, so that a single piece and small batch production can be automated, it is known as the realization of a "flexible automation."             High precision machining parts, size dispersion is sma

10、ll, making assembly easy, no longer need to "repair."             Multi-processes can be centralized to reduce the parts in between the frequent handling machine. Automatic alarm, automatic monitoring, automatic compensation and o

11、ther self-regulatory functions, thereby allowing no time to look after processing. The benefits derived from the above 5. Such as: reducing the labor intensity, saving labor (one person can guard multiple machines), a decrease of tooling to shorten the new product trial production cycle and producti

12、on cycle can respond quickly to market demands and so on.             These advantages are their predecessors imagined, is a very major breakthrough. In addition, the NC machine tool, or the implementation of FMC (flexible manufacturing cel

13、l), FMS (flexible manufacturing system) and CIMS (Computer Integrated Manufacturing System) and other enterprise information foundation for transformation. CNC technology has become the core of the manufacturing automation technology and basic technology.        &#

14、160;    A macro perspective, industrialized house military and civilian machinery industry, in the 20th century, the late 70s, early 80s have begun a large-scale application of CNC machine tools. Its essence is the use of information technology on the traditional industries (incl

15、uding the Army, China Machinery Industry) for technological transformation. In addition to the manufacturing process using CNC machine tools, FMC, FMS, also included in the product development in the implementation of CAD, CAE, CAM, virtual manufacturing and production management in the implementati

16、on of MIS (management information system), CIMS and so on. As well as to increase its production of information technology products, including artificial intelligence and other content. As the use of information technology on foreign military and civilian machine-building industry in-depth transform

17、ation (known as information technology) and finally make their products in the international military and civilian market competitiveness has increased significantly. We in the information technology to transform traditional industries than in developed countries is about 20 years behind. As my mach

18、ine ownership, the proportion of CNC machine tool (NC rate) to 1995, only 1.9%, while in Japan in 1994 reached 20.8%, so every year a large number of imports of machinery and electronic products. This also shows the macro level the need for transformation of numerical control machine tools.  &#

19、160;          2 How to transform CNC machine tools             2.1 The transformation of the contents of the NC             CNC ma

20、chine tools and production line-oriented transformation of the main contents include the following: One is to restore the original function, machine tools, production lines there is some fault diagnosis and recovery; the other is NC-based, in the general machine tools addend remarkable devices, or p

21、lus NC system, transformed into NC machine tools, CNC machine tools; its third renovation in order to enhance precision, efficiency and degree of automation, mechanical, electrical parts of the renovation, the mechanical part of the re-assembly process, to restore the original precision; its product

22、ion does not meet the requirements of CNC system be updated with the latest CNC; its four technical updates or technical innovation, in order to improve performance or grade, or for the use of new technology, new technology, based on the original large-scale technology updates or technical innovatio

23、n, the more substantially improve the level and class of renewal and transformation. Reposted elsewhere in the paper for free download :/             2.2 The selection of NC system           

24、;  There are three main types of CNC system, reform should be selected according to specific circumstances.             Drag open-loop stepper motor system. The system is mainly the servo drive stepper motor, power stepper motors,

25、 electro-hydraulic pulse motors. Sent by the CNC system feeding command pulse control by the drive circuit and power amplification, so that stepper motor rotation, through the gear pair with the ball screw-driven implementation of the components. As long as the control instructions number of pulses,

26、 frequency and power order, to control the implementation of the components of the displacement movement, velocity and direction of movement. Such a system does not require the actual measured position and velocity feedback to the input side, it is called open-loop system, the system's displacem

27、ent accuracy depends mainly on the angular displacement precision stepper motor and gear drive screw and other components pitch accuracy, so the lower accuracy of the system displacement. The system is simple in structure, debugging easy maintenance, reliable, low cost, easily converted successfully

28、.             Induction motor or DC motor drag, grating measurement feedback loop CNC system. The system is the difference between open-loop system: from the grating, sensor position detection device synchronization, etc. The actual measure

29、d position feedback signal, at any time with a given value of comparison, the difference between the two amplification and transformation, driving the executing agency, to a given speed to eliminate bias toward the direction of movement, until a given position and the feedback so far is zero differe

30、nce between the actual location of the. Closed-loop feed system in structure than the open-loop feed system complexity, cost is also high, strict requirements on the environment at room temperature. Design and debug than the open-loop system is difficult. However, available to the system than the op

31、en-loop into the higher accuracy, faster speed, more drive power characteristic indicators. According to technological requirements and decide whether to adopt such systems.             AC / DC servo motor drag, semi-closed loop encoder fee

32、dback numerical control system. Semi-closed-loop system detects components installed in the middle of transmission parts, the indirect measurement of the location of the implementation of parts. It can only compensate for some of the internal components of the system loop error, therefore, it's

33、more accurate than the accuracy of closed-loop system is low, but its structure and debugging as compared with the closed-loop system is simple. In the angular displacement and speed detection devices detect components and servo motor 作成 a whole when there is no need to consider position detection d

34、evice installation problems. The company's current production numerical control system manufacturers are more well-known foreign companies such as Germany, SIEMENS Corporation, Japan's FANUC, Inc.; domestic companies such as China Everest Company, Beijing Aerospace CNC System Corporation, Hu

35、azhong CNC CNC high-grade corporate and Shenyang National Engineering Research Center . Select CNC systems are mainly based on numerical control after transformation to be achieved in a variety of precision machine tools, drive motor power and the user's requirements.     

36、60;       3 NC transformation of the main mechanical components converted             A new CNC machine tools, designed to achieve: There is a high static and dynamic stiffness; coefficient of friction bet

37、ween the motion pairs small, driving without gaps;-power large; ease of operation and maintenance. CNC transformation should be possible to achieve these requirements. NC device can not be considered to connect with ordinary machine tools CNC machine tools reached the requirements of the major compo

38、nents should also be modified accordingly to meet certain design requirements in order to achieve the desired transformation of the purpose.             Sliding Guideway. On the CNC lathe, the rails should have the ordinary lathe addition t

39、o precision and process-oriented nature, but also have a good rubbing, wear characteristics, and reduce friction while the death zone. At the same time have sufficient stiffness to reduce the rail deformation on the impact of machining accuracy, there must be a reasonable guide rail protection and l

40、ubrication.             Gear pair. General machine tools, gear mainly concentrated in the spindle box and gearbox. In order to ensure transmission accuracy, numerical control machine tool precision gears used in high grade than the general

41、machine tools. The structure must be able to achieve the seamless transmission, and thus transformation, the machine tool main gear must meet the requirements of CNC machine tools to ensure the machining accuracy.             Slide screw an

42、d ball screw. Screw drive directly related to the transmission chain accuracy. Depends on the choice of screw machining parts precision and drag torque requirements. Parts to be processed can be used when high accuracy is sliding screw, but should check the original screw wear, such as the cumulativ

43、e pitch error and pitch error and matching nut gap. In general sliding screw shall be not less than six, nut gap is too large then the replacement nut. Use of a sliding screw ball screw relatively low price, but it is difficult to meet the high precision parts machining. Reposted elsewhere in the pa

44、per for free download :/             Ball screw friction loss of small, high efficiency, the transmission efficiency can be above 90%; high precision and long life; starting torque and torque movement was similar, can reduce the motor start

45、ing torque. Therefore, to meet the high precision parts machining requirements.             Security protection. Transforming effect must be one of security as a precondition. The transformation in the machine according to the actual situat

46、ion to take appropriate measures, must not be ignored. Ball Screws are precision components, working to prevent dust, especially when the chip and the hard sand into the raceway. In the vertical screw can also be added on the overall iron shield. Great extension units in contact with the sliding rai

47、l surface must be sealed at both ends is good, definitely hard to prevent the entry of foreign matter granular sliding surface damage rails. Reposted elsewhere in the paper for free download :/更好的翻译建议感谢您为 Google 翻译提供翻译建议。提供更好的翻译建议：On the transformation method of CNC machine tools Abstract: With the

48、development of science and technology, general machine tools are increasingly unable to meet the market demand, its labor intensity, high-risk, and mass production can not meet the needs of modern science, more and more companies will gradually shift the general machine tools NC, as CNC machine tool

49、s can compensate for many of the shortcomings of general machine tools, machining can be realized with high precision, multi-centralized processes, automatic alarm, automatic compensation and automatic monitoring functions. Describes how to transform CNC machine tools and made a numerical transforma

50、tion of the issues and recommendations. Keywords: machine tool; NC; transformation             If used in the ordinary lathe and prolonged use of the lathe is not to reform, only the purchase of new CNC lathe, will increase the number of ma

51、nufacturers of equipment costs. Therefore, manufacturers and the prolonged use of ordinary lathe CNC lathe for transformation is the only way. In this talk about how to transform CNC lathe.             A transformation of CNC machine tools

52、need to             Microscopic point of view, than the traditional CNC machine tools has the following outstanding advantages, but also some advantages from the numerical control system are included in the power of the computer.  

53、0;          As the computer has superior computing power, you can accurately calculate the instantaneous axis of each instantaneous movement of the exercise should be, it can compound into a complex curve or surface.      

54、60;      Automated processing can be achieved, and flexible automation to increase efficiency than traditional machines 3 7 times.             As the computer has a memory and storage capacity, you can enter th

55、e program to remember and storage down, and then automatically according to the procedure provided for in order to carry out in order to achieve automation. CNC machine tools as long as the replacement of a program, you can realize the automation of another workpiece, so that a single piece and smal

56、l batch production can be automated, it is known as the realization of a "flexible automation."             High precision machining parts, size dispersion is small, making assembly easy, no longer need to "repair." 

57、0;           Multi-processes can be centralized to reduce the parts in between the frequent handling machine. Automatic alarm, automatic monitoring, automatic compensation and other self-regulatory functions, thereby allowing no time to look aft

58、er processing. The benefits derived from the above 5. Such as: reducing the labor intensity, saving labor (one person can guard multiple machines), a decrease of tooling to shorten the new product trial production cycle and production cycle can respond quickly to market demands and so on.  

59、0;          These advantages are their predecessors imagined, is a very major breakthrough. In addition, the NC machine tool, or the implementation of FMC (flexible manufacturing cell), FMS (flexible manufacturing system) and CIMS (Computer Integrate

60、d Manufacturing System) and other enterprise information foundation for transformation. CNC technology has become the core of the manufacturing automation technology and basic technology.             A macro perspective, industrialized hous

61、e military and civilian machinery industry, in the 20th century, the late 70s, early 80s have begun a large-scale application of CNC machine tools. Its essence is the use of information technology on the traditional industries (including the Army, China Machinery Industry) for technological transfor

62、mation. In addition to the manufacturing process using CNC machine tools, FMC, FMS, also included in the product development in the implementation of CAD, CAE, CAM, virtual manufacturing and production management in the implementation of MIS (management information system), CIMS and so on. As well a

63、s to increase its production of information technology products, including artificial intelligence and other content. As the use of information technology on foreign military and civilian machine-building industry in-depth transformation (known as information technology) and finally make their produ

64、cts in the international military and civilian market competitiveness has increased significantly. We in the information technology to transform traditional industries than in developed countries is about 20 years behind. As my machine ownership, the proportion of CNC machine tool (NC rate) to 1995,

65、 only 1.9%, while in Japan in 1994 reached 20.8%, so every year a large number of imports of machinery and electronic products. This also shows the macro level the need for transformation of numerical control machine tools.             2 Ho

66、w to transform CNC machine tools             2.1 The transformation of the contents of the NC             CNC machine tools and production line-oriented transformation of the main contents include the following: One is to restore the original function, machine tools, production lines there is some fault diagnosis and recovery; the other is NC-based, in the general machine tools addend remarkable devices, or plu