丁兆福外文加翻譯

1、山東理工大學 畢業(yè)設計（論文）外文資料及譯文學 院： 機械工程學院 專 業(yè)： 機械設計制造及其自動化 學生姓名： 丁兆福 學 號： 0732107935 指導教師： 王勇 7外文和翻譯CNC FLOOR BORIING AND MILLING MACHINEDESIGN TRANSFORMATIONBoring and milling machine as a basis for large-scale landing a lot of equipment in the processing and manufacturing equipment, is widely used. In rec

2、ent years, with the technical level of equipment manufacturing industry significantly increased size of the work piece machining accuracy and quality requirements are becoming increasingly improve, the traditional processing technology can not meet the market economy has a high efficiency, high qual

3、ity, multi-processing requirements change , CNC machining is imperative.However, investing in new large-scale investment in CNC Floor Boring and Milling Machine is not only large and long manufacturing cycle; the same time, out of the existing milling machine is not only a waste of large floor is hu

4、ge and the current level of technology to make the old equipment can radiate youth and vitality.1, Transformation of the Basic Principles of NC Mechanical parts for machine tools, CNC machines and general machine tools are basically the same basic parts as large as possible be preserved and utilized

5、.Use of modern communication technology and digital spindle drive machine CNC technology on the main transmission part, the feed drive section, in accordance with the standards of the new CNC machine tools, conduct a thorough upgrade.Choose the world's leading CNC system and servo motor, re-desi

6、gn and manufacture of machine electronic control system; column lateral movement of bodies to replace the double adjustable preload feed a small helical gear boxes and high-precision helical rack transmission mechanism; spindle box down institutions Dress Ball. Original DC spindle motor drive system

7、 to the Siemens digital AC spindle drive system, the installation of the feed axis movement and rotation of grating position encoders. CNC machine tools in order to achieve the whole closed-loop control. And has automatic and manual work, to reach the current advanced level of similar machines.2, La

8、rge Floor CNC Milling Machine Design and Reconstruction Project Lateral movement with the grinding bed column (length 12m), before the column of the rail surface, repair processing column skateboard; bed set mounted high-precision helical rack. AC Digital Spindle headstock drives system according to

9、 requirements, design transformation spindle speed change mechanism.Replacement of lateral movement organizations column adjustable preload dual-feed a small helical gear boxes and high-precision helical rack transmission, AC servo motor drive. Lateral movement of the column bed upon installation of

10、 the German "HEIDEN-HAIN" grating, lateral column feed to achieve closed loop control of movement.Headstock vertical motion mechanism driven by AC servo motor, the mechanical reduction gear and dress of the ball screw pair, driving along the spindle box to complete before the column guide

11、vertical movement. Column before the installation of the vertical grating on the direction of motion, the spindle box vertical feed movements of the closed loop control.Vertical movement of the boring bar axis AC servo motor driven organization, the mechanical reduction gear and dress of the ball sc

12、rew nut to drive the boring bar to complete the longitudinal axis of movement. Axis of linear motion in the direction of boring bar installed on the grating, to achieve the vertical movement of the boring bar axis closed loop control. Ram vertical moving mechanism driven by AC servo motor, the mecha

13、nical reduction gear and dress of the ball screw pair, led to complete longitudinal movement of ram. Meanwhile, the vertical linear motion in the direction of ram to install grating, vertical ram movement to achieve closed loop control. Rotary table driven by AC servo motor, the rotary table install

14、ed at the end spindle rotary position encoder, high precision indexing closed loop positioning control. Longitudinal Movement of AC servo motor drive, U-axis support bearings at both ends of the ball screw replacement, installing grating, the full realization of U-axis numerical control, and closed

15、loop control.Lubrication of the movement Guide way automatic centralized lubrication station and achieve timing, quantitative, fixed-point automatic lubrication. Replaced by standard CNC machine tool linear feed axis of the towline and the installation of guard rails and limit protection switch. Sie

16、mens 840D CNC system or use Favors 8070CNC CNC system, may also need to use well-known manufacturers of CNC system and the same manufacturer of the AC servo motor, servo drive systems and PLC and so on. Need to have: interpolation functions, compensation, data transmission functions, polar functions

17、, circulatory function, diagnostic alarm, PC diagnostic alarm function, three-dimensional graphics display analog functions, manual and automatic programming processing procedures and storage and a variety of parameters called and other functions. System features a 6 servo axes, with a 4-axis functi

18、on. Cabinet equipped with air conditioning and lighting panels function.Boring and milling machine to improve the floor work in two ways: automatically when the work and from the NC boring and milling machine to use as an ordinary number. Re-design to create a button to stop hanging concentrated, un

19、ified control of the machine. The button station will feed all of the control of movement and the main transmission operation functions together. Button station with full CNC keyboard, control panel for the Chinese language interface, the display is flat LCD color display. Configure multiple keys an

20、d hand-held manual pulse generator operation unit. Hydraulic system according to the spindle speed and feed motion machine locating and clamping action to re-design and manufacturing requirements.3, CNC Floor Boring and Milling Machine Reformed With Common Type and Floor Type CNC Boring and Milling

21、Machine Compared the Main ParametersNC reformed to T6920 and Y6920 common type and TK6920 CNC floor-type milling machine, for example, three in the boring bar diameter, the movement of the moving parts of the travel range, boring and milling plane diameter range of parameters consistent with other a

22、spects. But the NC transformation involves the spindle speed range, torque characteristics and the feed part of the feed rate range of motion, movement accuracy, precision, automation and process efficiency, etc. After comparing the parameters to prove that modified the landing NC relative to the or

23、dinary type boring and milling machine milling machine landing performance parameters to achieve a technological leap, its function and the main performance parameters and new CNC floor type boring and milling machines are basically the same performance parameters. While retaining a common function

24、of digital milling machine, so that the machine type and the general set of digital numerical control milling machine landing work characteristics in one. However, the cost of new products compared to CNC Floor Boring and Milling Machine, have been substantially reduced.Common ground boring and mill

25、ing machine in the complex processing of large holes in the cabinet when repeated measurements required manual alignment, low efficiency, accuracy, difficult to adapt to a variety of complex large box size holes changing requirements. The processing of CNC Floor Boring and Milling Machine CNC progra

26、m control by the servo axes motion positioning or interpolation to complete movement, the linkage with the spindle, turning heads driven plane coordinate system to complete the processing of any curve; in the processing of large box holes when the repeated measurements without manual alignment, as l

27、ong as the operator input to the CNC program and the relative position coordinates of each hole size, with a good tool and run the procedures. Processing efficiency, high precision, quality, size of holes in the complex plane curve profile variability and change in working hours, as long as the proc

28、essing program can adapt to change.After transformation, NC boring machine for pieces made of steel, cast iron and nonferrous metal parts of the rough, finishing. Both a larger size to complete the major type of box the hole boring process, but also can be done face milling, drilling, reaming, reami

29、ng and thread cutting and other processing requirements of the hole. Great to meet users holes work piece complex distribution box, high quality, high efficiency, strong adaptability requirements, facilitate the operation, improve productivity and reduce production costs.落地鏜銑床的數控化改造設計大型落地鏜銑床作為基礎設備大量

30、裝備于加工制造業(yè)，應用非常廣泛。近年來，隨著裝備制造業(yè)技術水平的大幅度提高，工件的加工尺寸精度和質量要求也日趨提高，傳統的加工工藝已經不能適應市場經濟條件下的高效率、高質量、多變化的加工要求，數控化加工勢在必行。然而，投資購買全新的大型數控落地鏜銑床不僅投資大而且制造周期長；同時，淘汰現有的大型落地鏜銑床不但浪費巨大，而且以現在的技術水平完全可以使老設備煥發(fā)青春和活力。1、 數控改造的基本原則對機床的機械部分，數控機床和普通機床基本一致的大型基礎性零部件盡量最大可能予以保留和利用。利用現代化的交流數字主軸驅動技術和計算機數控技術對機床的主傳動部分，進給傳動部分，按照全新的數控機床的標準，進行全

31、面徹底的升級改造。選擇世界領先的數控系統和交流伺服電動機，重新設計制造機床電控系統；立柱橫向移動機構更換為可調預緊力的雙小斜齒輪進給箱和高精度斜齒條傳動機構；主軸箱升降機構換裝滾珠絲杠。將原直流主軸電動機驅動系統改為西門子交流數字主軸驅動系統，各進給運動軸加裝光柵尺和旋轉位置編碼器。從而實現機床的數控化、全閉環(huán)控制。并具有自動和手動兩種工作方式，使其達到目前同類機床的先進水平。2、 大型落地鏜銑床的數控化設計及改造項目磨削加工立柱橫向移動用床身（長度12m）、前立柱各導軌面，加工修復立柱滑板；床身鑲裝高精度斜齒條。主軸箱按交流數字主軸驅動系統要求，設計改造主軸變速機構。立柱橫向移動機構更換為可

32、調預緊力的雙小斜齒輪進給箱和高精度斜齒條傳動機構，用交流伺服電動機驅動。立柱橫向運動床身上加裝德國“HEIDEN-HAIN”光柵尺，實現立柱橫向進給運動的全閉環(huán)控制。主軸箱垂直運動機構采用交流伺服電動機驅動，經機械減速裝置和換裝的滾珠絲杠螺母副，帶動主軸箱沿前立柱導軌完成垂直運動。前立柱垂直運動方 向上加裝光柵尺，實現主軸箱垂直進給運動的全閉環(huán)控制。鏜桿軸縱向移動機構采用交流伺服電動機驅動，經機械減速裝置和換裝的滾珠絲杠螺母副，帶動鏜桿軸完成縱向移動。在鏜桿軸直線運動方向上加裝光柵尺，實現鏜桿軸縱向移動的全閉環(huán)控制?；砜v向移動機構采用交流伺服電動機驅動，經機械減速裝置和換裝的滾珠絲杠螺母副，帶動滑枕完成縱向移動。同時，在滑枕縱向直線運動方向上加裝光柵尺，實現滑枕縱向移動的全閉環(huán)控制。工作臺旋轉采用交流伺服電動機驅動，在旋轉工作臺主軸末端加裝旋轉位置編碼器，實現高精度分度定位的全閉環(huán)控制。工作臺縱向移動采用交流伺服 電動機驅動，U軸更換滾珠絲杠兩端支撐軸承，加裝光柵尺，實現U軸的全數控化、全閉環(huán)控制。各運動導軌副的潤滑采用自動集中潤滑站，實現定時、定量、定點自動潤滑。按數控機床標準更換各直線進給軸拖鏈并加裝導軌防護罩及限位保護開關。選用西門子840D 數控系