丁兆福外文加翻译

1、山东理工大学 毕业设计（论文）外文资料及译文学 院： 机械工程学院 专 业： 机械设计制造及其自动化 学生姓名： 丁兆福 学 号： 0732107935 指导教师： 王勇 7外文和翻译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.落地镗铣床的数控化改造设计大型落地镗铣床作为基础设备大量

30、装备于加工制造业，应用非常广泛。近年来，随着装备制造业技术水平的大幅度提高，工件的加工尺寸精度和质量要求也日趋提高，传统的加工工艺已经不能适应市场经济条件下的高效率、高质量、多变化的加工要求，数控化加工势在必行。然而，投资购买全新的大型数控落地镗铣床不仅投资大而且制造周期长；同时，淘汰现有的大型落地镗铣床不但浪费巨大，而且以现在的技术水平完全可以使老设备焕发青春和活力。1、 数控改造的基本原则对机床的机械部分，数控机床和普通机床基本一致的大型基础性零部件尽量最大可能予以保留和利用。利用现代化的交流数字主轴驱动技术和计算机数控技术对机床的主传动部分，进给传动部分，按照全新的数控机床的标准，进行全

31、面彻底的升级改造。选择世界领先的数控系统和交流伺服电动机，重新设计制造机床电控系统；立柱横向移动机构更换为可调预紧力的双小斜齿轮进给箱和高精度斜齿条传动机构；主轴箱升降机构换装滚珠丝杠。将原直流主轴电动机驱动系统改为西门子交流数字主轴驱动系统，各进给运动轴加装光栅尺和旋转位置编码器。从而实现机床的数控化、全闭环控制。并具有自动和手动两种工作方式，使其达到目前同类机床的先进水平。2、 大型落地镗铣床的数控化设计及改造项目磨削加工立柱横向移动用床身（长度12m）、前立柱各导轨面，加工修复立柱滑板；床身镶装高精度斜齿条。主轴箱按交流数字主轴驱动系统要求，设计改造主轴变速机构。立柱横向移动机构更换为可

32、调预紧力的双小斜齿轮进给箱和高精度斜齿条传动机构，用交流伺服电动机驱动。立柱横向运动床身上加装德国“HEIDEN-HAIN”光栅尺，实现立柱横向进给运动的全闭环控制。主轴箱垂直运动机构采用交流伺服电动机驱动，经机械减速装置和换装的滚珠丝杠螺母副，带动主轴箱沿前立柱导轨完成垂直运动。前立柱垂直运动方 向上加装光栅尺，实现主轴箱垂直进给运动的全闭环控制。镗杆轴纵向移动机构采用交流伺服电动机驱动，经机械减速装置和换装的滚珠丝杠螺母副，带动镗杆轴完成纵向移动。在镗杆轴直线运动方向上加装光栅尺，实现镗杆轴纵向移动的全闭环控制。滑枕纵向移动机构采用交流伺服电动机驱动，经机械减速装置和换装的滚珠丝杠螺母副，带动滑枕完成纵向移动。同时，在滑枕纵向直线运动方向上加装光栅尺，实现滑枕纵向移动的全闭环控制。工作台旋转采用交流伺服电动机驱动，在旋转工作台主轴末端加装旋转位置编码器，实现高精度分度定位的全闭环控制。工作台纵向移动采用交流伺服 电动机驱动，U轴更换滚珠丝杠两端支撑轴承，加装光栅尺，实现U轴的全数控化、全闭环控制。各运动导轨副的润滑采用自动集中润滑站，实现定时、定量、定点自动润滑。按数控机床标准更换各直线进给轴拖链并加装导轨防护罩及限位保护开关。选用西门子840D 数控系