Application status quo and development trend of CNC surface grinder

I. Introduction

  Modern industrial production, and the production of small quantities of parts accounted for the proportion of the number of products increasing rapidly increasing complexity and accuracy requirements of the parts the traditional general machine tools have become increasingly difficult to adapt to the requirements of modern production, while the CNC machine tools has a high-precision, high-efficiency, a machine with complex surface machining characteristics, can be completed, especially the rapid development of computer technology and is widely used in CNC system, the the NC device's main function almost entirely by software to achieve hardware almost General Motors, making it more processing flexibility, more powerful.

 punch and die

  The manufacturing competition from early to reduce labor costs, product costs, and improve the overall efficiency and quality of competition, developed to fully meet customer requirements, and actively develop new products competition, will face the knowledge - technology - products update cycles are getting shorter, smaller and smaller batch of products, and higher requirements for quality, performance, and community environmental protection, green manufacturing continue to strengthen awareness. Agility and state-of-the-art manufacturing technology will be the primary means for enterprises to win the competition and survival, development. The combination of computer information technology and manufacturing automation technology is becoming more and more closely in the production of machine tools, CNC machine tools as an important foundation of automated flexible production proportion will be more and more.

  CNC flat grinding the Status and CNC system

  The surface grinder phase for lathes, milling machines, CNC system late, because of the special requirements of its numerical control system. Over the last decade, with CNC technology, continuous dressing grinder wheel, automatic compensation, automatic exchange of the grinding wheel, multi bench, automatic transmission and workpiece clamping operation function achieved CNC surface grinder gradually gained popularity. In recent years, Hanover, Tokyo, Chicago, and other large-scale machine tool exhibitions, CNC grinding machines accounted for most of the entire grinder exhibits, such as the well-known German the BLOHM company, ELB companies grinder manufacturer is no longer produced in the ordinary grinder, Japan's Okazaki the Nikko mass production of full-function CNC flat grinding positive development, while the development of high-grade digital flat grinding, flat grinding, low-grade CNC.

  BRILLIANT series two coordinates CNC profile grinder Germany ELB production a few years ago, the vertical and horizontal CNC axis, vertical hydraulic control wheel dresser diamond wheel mounted on a workbench, a wide range of applications; SUPER-BRILLIANT series is CMM CNC surface and profile grinder, bed made ​​of natural granite, high geometric accuracy, rail linear rolling guide, recoilless mechanical drive, so as to ensure that the workpiece surface finish better; BRILLIANT-FUTURE for more than two a series of improved products, bed produced with artificial granite, the the longitudinal hydrostatic guideway toothed belt drive, vertical and horizontal rail linear rolling guide for pre-loading, the ballscrew axis CNC controlled AC servo motor, 0.5 μ m of the measurement resolution. The ELB company developed the grinder has the latest contemporary technology, mechatronics and computer technology based CAM-MASTER Series flexible grinding unit series CAD-MASTER and COMPACT-MASTER series grinding machining centers, control shaft up up to 24 axes, In addition, due to the full implementation of the modular design so special grinder shorten the manufacturing cycle, ELB has also developed a variety of dedicated and efficient grinder, as SFVG100 / 2 dedicated grinder with grinding head can be tilted, continuous trimming creep feed , oblique plunge grinding, with eleven CNC control axis, like a grinding center. British JONES & SHIPMAN with the United States AB developed the A-B8600 CNC system flat grinding for FORMAT5 CNC, CNC control hydraulic valve, driven longitudinally adjustable speed movement, horizontal and grinding feed ball screw DC servo motor drive, intermittent wheel dresser, the CRT graphic simulation. Can also be used with other models of CNC system to meet the requirements of different users.

  At present, with the continuous improvement of semiconductor integration, the new system appearance on getting smaller and smaller, more compact structure, function remote communication, remote diagnostics, multi-machine networking; close to the operator interface to the WINDOWS system, Add pieces of mouse, remote control operation. The FANUC year main launch 18I, 16I, 20I, 21I system, SIEMENS 840D, 810D, 802D are compact structure system. Some manufacturers, such as: Taiwan Precision Machinery Research & Development Center the development of PA8000NT Series CNC controller, on the use of the the WINDOWS NC operating system, and real-time multi-tasking NT core processing speeds of up to 2000 / ssingle program, a single pre- read processing up to 1000, has AART adjustment techniques (preconditioning) and parameter optimization learning function enables the following error approaches zero, the the software processing path filter can reduce the cutting process, due to acceleration of change is too large by produce mechanical resonance, so as to improve the surface roughness; equipped with servo flexible with +-10V analog servo interface, while providing international standard SERCOS digital servo communication interface; PLC programming ladder structure statement, function block instruction code, flowcharts five grammar, ease of design, communication and maintenance; computer remote communication, real-time remote maintenance functions; controlled axes and spindle can be expanded to up to 64 axes and I / O points can be expanded to 792/528 points, the use of Pentium processor, high-speed PLC processing speed of 25K.

  World apart from the famous SIEMENS, FANUC CNC system professional factory has developed production system for flat or profile grinding, the flat grinding plant itself also actively developing numerical control system applicable to their grinder. Are:

  Siemens SINUMERIK 840D system, the system has over twenty servo axis coordinate continuous stroke control, manual data input or input via an external computer, remote diagnostics, automatic compensation for changes in the itinerary, the amount of wheel dressing with the grinding wheel diameter decreases ball screw gap error compensation.

  The The Siemens 3G system is designed for grinding and developed, equipped with a device used to man-machine dialogue operation prompt, in the tilt of the axis linear and circular interpolation, often run in grinding cycle, such as the spindle swing with an external signal to interrupt the implementation of the program cut into the grinding wheel, wheel dressing and other special preparation function, the preparation of a fixed cycle program. Which not only be able to use an external measuring device (switching signal), but also when connected on a suitable measuring head can go directly to the control means to be compared with the final dimensions.

  The United States the ALLEY-BRANDLY company's 8400CNC CNC series of 8600CNC, suitable for lathes, milling machines and grinders, its 8400CNC of up to control 6 servo axes, any 2-axis circular interpolation, any 3-axis spiral interpolation 6-axis linear interpolation. 8600CNC series up to be able to control the coordinates of 17, including eight participating interpolation axis 8-bit control axis and a spindle, with a graphical display, extended branch procedures, processing time, high-speed program verification tool life monitoring function.

  Japan FANUC development OG high-speed high-performance numerical control system, which O-GSG apply to the surface grinder, grinding parts of different shapes, four different grinding wheel spindle tilt angle control function, snagging rough grinding, fine grinding, spark grinding to a complete set of the grinding cycle grinding wheel rolling trimmed position compensation function, dresser be trimmed wheel normal direction control function, trim the the roller outer edge of the arc radius compensation function relative to the grinding wheel in shapes display function and display grinding parameters, the minimum setting of 0.1 μ m, is a "compact" type CNC system, the lower the price.

  There are also jointly developed with universities, such as Germany ELB the UNICON systems. Okuma of Japan ironwork OSP5000G-G developed the plane of the OSP30-NF and profile grinding CNC system, OSP5000G-G up to control the nine coordinate six coordinate linkage, with a 12-inch color display, man-machine dialogue programming, automatically determines the cutting coefficient can be used floppy disk input into the FMS system, the equivalent of the minimum pulse the mobile equivalent and detection equivalent are 0.1 μ m, with a closed-loop manner inductosyn flat grinding.

  There flat grinding factory CNC OEMs of the system, but the self-developed software, use it more suitable for flat and profile grinding, such as the JUNG German company Siemens SINUMERIK 810 basis using the company's proprietary software, with JUNG KONTUR the programming language of the grinding wheel molding trim, and graphics auxiliary operating functions. Japanese the Okamoto company in on the FANUC the company CNC system hardware, the development of the OPL language used for grinding, and so on.

  Today's linear motor, balancing technology, the increasing development of the process should be, greatly improving the ergonomics of the machine, the development and utilization of suitable measurement techniques application of numerical control system, enhanced electrical automatic control functions of the machine even more powerful.