A, introduction

Modern industry, medium and small batch spare parts of the production of the proportion of the product quantity is more and more high, NSK bearing parts of the complexity and the precision requirement increasing quickly, the traditional ordinary machine is getting more and more difficult to adapt to the requirements of the modern production, and numerical control machine tool has high precision, high efficiency and multi-usage, can complete the characteristics of the surface process factors, especially the rapid development of computer technology and widely used in the numerical control system, the main functions of the numerical control device to achieve by almost all software, hardware can almost universal, so as to make it more flexible processing, function more powerful.

Manufacturing has reduced from competitive early labor costs, product cost and improve the efficiency and quality of the whole enterprise of competition, the development to fully satisfy customer's requirements, and actively developing new products competitive, will face-technology-product knowledge updating cycle more and more short, product batch smaller and smaller, and to quality, performance requirements of higher, at the same time, social on environment protection and strengthening the consciousness of green manufacturing. So agile advanced manufacturing technology will become the enterprise competition and won the principal means of survival and development. The computer information technology and manufacturing automation technology combined with more and more close, FAG bearing as an important basis of automation flexible production CNC machine in a proportion of the machine tool will be more and more.

Second, the numerical control PingMo present situation and the main numerical control system

Surface grinder relative to the lathe, milling machine adopts CNC system is late, because it to the special requirements of numerical control system. In the past dozens of years, with the aid of CNC technology, the grinder of grinding wheel continuous nap, automatic compensation, automatic exchange grinding wheel, workbench, automatic transfer and clamping work-piece and other operational functions can be realized, numerical control technology in the flat grinder gradually on popularity. In recent years, Tokyo, Chicago, Hanover and domestic and other large exhibition of machine, CNC grinding in the grinding machine in the exhibits have accounted for most, such as Germany BLOHM company, ELB companies, such as the famous grinding machine factory is no longer production ordinary grinding machine, Japan NTN bearing GangBen, the company also, such as CNC PingMo all batch production function, in the development of high grade numerical control PingMo while actively developing, and low numerical control PingMo.

A few years ago ELB German company produces the BRILLIANT series two coordinate molding CNC grinding machine, the vertical and horizontal for CNC axis, longitudinal for hydraulic control, grinding wheel dressing on the installation of diamond wheel, the scope of the wider; SUPER-BRILLIANT series is three coordinates CNC plane and forming grinding machine, lathe bed with natural granite is made, geometry precision is extremely high, with linear rolling guide rails, mechanical drive without something, so as to ensure the good surface finish; BRILLIANT-FUTURE for above two series of product improvement, lathe bed with artificial granite production, longitudinal with static pressure guide rail, tooth belt transmission, the vertical and horizontal guide for the linear rolling guide with jose, the ball screw transmission, three axis CNC control AC servo motor, 0.5 u m resolution of the measurement. At the same time ELB company developed the latest technology with a contemporary products grinding machine, namely to mechanical and electrical integration and computer technology as the foundation of the CAM-MASTER series flexible grinding unit, CAD-MASTER series and COMPACT-MASTER series grinding machining center, control axis up to 24 axis, another due to the full implementation of the modular design, make special grinding machine manufacturing cycle shortens, ELB company has developed many efficient specialized grinder, such as SFVG100/2 specialized grinder, have can tilt grinding head, continuous nap, slow feeding, inclined cut grinding function, with eleven root CNC control axis, as a grinding machining center. JONES&SHIPMAN Britain and the us A-B company has developed A-B8600 numerical control system used for FORMAT5 numerical controlled PingMo, by CNC control hydraulic valve, longitudinal can drive speed movement, transverse and grinding head into to use the ball screw pair, dc servo motor drive, punctuated the grinding wheel nap, CRT graphic simulation shows. And at the same time with other types of CNC system, NACHI bearing to meet the requirements of different users.

At present, with the continuous improvement of the semiconductor integration, the launch of new system in appearance on more and more small, more and more compact structure, function increased on telecommunications, remote diagnosis, computer networking, and so on; Operation for WINDOWS system * world nearly, increase the mouse, the remote control and other operational pieces. FANUC the company this year launched 18 I, 16 major I, and I, and I system, SIEMENS is 840 D, 810 D, 802 D are structure compact system. And some manufacturers such as: Taiwan precision machinery research and development center of development PA8000NT series CNC controller, using the WINDOWS NC operating system, and NT instant more work processing core, single quarter processing speed of 2000 piece of program/SEC, single quarter but number can reach 1000 pieces processing, has the AART (the accommodation technology) and parameter optimization learning function, can make the follow error close to zero, the software processing route filter can reduce cutting process, because too much change generated by the acceleration of mechanical resonant, so as to improve the surface roughness; With servo is quick, have +,-10 V analog servo interface, and to provide the international standard SERCOS digital servo communication interface; PLC program design a ladder diagram, structure, function blocks statement, instruction code, flow charts five grammar, easy to design, communication, and maintenance; Has the remote computer communication, instant remote maintenance function; Control axis and can be expanded to 64 most main shaft axis, the I/O point can be expanded to 792/528 point, IKO bearing the pentium processors, fast processing speed PLC to 25 K.

The world famous SIEMENS, FANUC except such as professional development and production of numerical control system has many applicable to the plane or forming grinding system outside, some PingMo factory itself also actively developed for his grinder numerical control system. Mainly has:

Siemens company SINUMERIK 840 D system, this system has more than twenty root servo axes, continuous coordinate travel control, manual data input or through the external computer input, remote diagnosis and with the grinding wheel diameter and change trip, grinding wheel dressing quantity to be automatic compensation, the ball screw clearance error compensation, etc.

Siemens 3 G system is designed for grinding machining and development, INA bearing used to the man-machine dialogue with the operation of the tip device, in the axis tilt, can also be straight lines and circular interpolation, often appear in the grinding of the operation of the circulation, such as spindle swings, use external signal interrupt execution procedures, cut into the grinding wheel, grinding wheel dressing, and other special ready to function, fixed cycle of program. They not only can use external measuring devices (switch signal), still can when connected on a proper measurement head directly to control device and can finally size comparison.

The United States ALLEY-BRANDLY company the production of 8400 CNC, 8600 CNC series, suitable for lathes, milling machines and grinding machine, its 8400 CNC up six of control servo axes, as 2 axis for circular interpolation, 3 axis can be as helical interpolation, 6 axis linear interpolation. 8600 CNC series can control the most 17 coordinates, including eight participation interpolation axis, eight bit control axis and a spindle, has the graphic display, expand branch program, show processing time, high speed program check, the life of cutter monitoring etc. Function.

Japan FANUC company developed OG the high performance numerical control system, including O to be done-GSG surface grinder, can according to different shape grinding parts, there are four different grinding method, has the sand wheel inclined Angle control function, and the wastes grinding, coarse grinding and fine grinding, no spark grinding a set of grinding cycle, grinding wheel rolling recast position compensation function, trim is relative to be trimmed to normal direction wheel control functions, trim wheel rim arc radius compensation function, grinding wheel shape graphic display function and grinding parameter display, etc. System set minimum unit 0.1 u m, is a "tight" model of the numerical control system, the price is low.

In addition, such as Germany ELB company and the joint development of university UNICON system. Japan Wei blacksmith OSP5000G-the G, OSP30-NF and the development of graphic and by forming grinding numerical control system, and its OSP5000G-G up control nine coordinates, 6 coordinates can be linkage, with 12 inches CaiXian, the man-machine dialogue programming, automatic sure cutting coefficient, can use floppy disk input, into the FMS system, the minimum pulse equivalent, mobile equivalent and the measuring of the equivalent are 0.1 u m, on PingMo also adopted the inductive synchronizer all closed-loop way.

And though the PingMo factory adopts CNC system of main SKF bearing, but to the development software, the use of a more suitable for plane and forming grinding, such as German Siemens SINUMERIK 810 with JUNG company as the foundation, with this company special software, with JUNG KONTUR programming language to grinding wheel molding nap, and a graphics auxiliary operation function. Japan GangBen company FANUC company in numerical control system hardware, developed OPL language used for grinding machining, etc.

The linear motor, dynamic balance, technology, process development should have, and greatly improve the efficiency of the machine tool, appropriate measurement technology application for the development and utilization of the CNC system, enhance the electrical machine automatic control function mora.

Three, the development of domestic numerical control PingMo

From the 80 s in the beginning production CNC surface grinder, each development were developed by past the manufacturer, Morgan bearings and university and the MRC cooperative development scientific research units to direct introduction of the numerical control system mature development road. For example: hangzhou is a machine tool plant with 50 years history, specialized in the production of surface grinder of factory, it from 80 s began production of the numerical control PingMo, has produced the MGK7132 horizontal-axis moment Taiwan high precision PingMo, MK7130 series ordinary numerical control PingMo, MLK7140 numerical control slow to grind into shape, MGK7120, MK7163, MK7150 horizontal-axis moment digit-controlled PingMo, MKY7760 vertical shaft nc double end mill, MKY7660, MKY7650/101 lie axis CNC double end mill, and HZ-K1610, HZ-K2010, HZ-050 CNC, HZ-KD2010, HZ-K3015, HZ-K3020, HZ-K4020, and other special nc gantry plane and guide grinding machine. The numerical control system development application, with colleges and research units of single trigger system development cooperation, also have developed by itself with the single chip processor as the host of the simple control system, and adopt CNC makers of mature production CNC system and so on.

The production of MGK7120 high precision PingMo, FANUC by the Japanese company's POWER MATE-D dual axle numerical control system, control grinding head into to, the minimum feed 0.1 u m, have automatic finish grinding circular function.

 
MKY7650/101 automatic nc double end grinder is VIOTTO with Italy, the technical cooperation product, the Siemens SIMATIC S5-115-U PLC control, CRT display, machine tool right and left by the second shaft grinding head dc servo motor drive, machine tool can manually adjust and automatic grinding cycle options. Equipped with Italy (E9 type measuring system of Persia, two measurement head, a measure of the grinding wheel, will the grinding wheel wear is feedback to control system, grinding wheel compensation; Another measure of workpiece grinding head measurement, and the measured results of the input control system, the servo motor to compensate into; The right and left grinding head with VIOTTO grating position measurement for control and realized the machine of workpiece expect to complete the closed-loop and grinding the automatic processing.



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