Current status of CNC surface grinders and main CNC systems

Compared with lathes, milling machines, etc., surface grinders adopt numerical control systems later because of its special requirements for numerical control systems. In the past ten years, with the help of CNC technology, continuous dressing of grinding wheels, automatic compensation, automatic exchange of grinding wheels, multiple worktables, automatic transmission and clamping of workpieces have been realized, and CNC technology has gradually become popular on surface grinders. To
In recent years, large-scale machine tool exhibitions in Hanover, Tokyo, Chicago, and domestic, CNC grinders have accounted for the majority of the entire grinder exhibits. Famous grinder manufacturers such as German BLOHM and ELB no longer produce ordinary grinders. Ben, Nikko and other companies also produce full-function CNC flat grinders in batches. While developing high-end CNC flat grinders, they are actively developing middle and low-end CNC flat grinders.

In the past few years, the BRILLIANT series two-axis CNC forming grinder produced by German ELB company, its vertical and horizontal axis are CNC axes, and the longitudinal direction is hydraulically controlled. The grinding wheel dressing adopts a diamond roller installed on the worktable, which has a wide range of applications; SUPER-BRILLIANT series It is a three-coordinate CNC plane and profile grinder. The bed is made of natural granite and has extremely high geometric accuracy. The guide rail uses linear rolling guides. The mechanical drive has no backlash, so as to ensure that the workpiece has a better surface finish; BRILLIANT-FUTURE is the above two A series of improved products, the bed is made of artificial granite, the longitudinal use of static pressure guide, toothed belt transmission, the vertical and horizontal guides are preloaded linear rolling guides, ball screw transmission, three-axis CNC control AC servo motor, 0.5 The measurement resolution of μm.

At the same time, ELB has developed grinding machine products with the latest contemporary technology, namely CAM-MASTER series flexible grinding processing units based on mechatronics and computer technology, CAD-MASTER series and COMPACT-MASTER series grinding processing centers, with the most control axes It can reach 24 axes. In addition, due to the comprehensive implementation of modular design, the manufacturing cycle of special grinders is shortened. ELB has also developed a variety of high-efficiency special grinders, such as SFVG100/2 special grinders, which have tiltable grinding heads, continuous dressing, and slow feed. , The oblique cut into the grinding function, with eleven CNC control axes, like the same grinding machining center. British JONES&SHIPMAN company and American AB company developed A-B8600 numerical control system for FORMAT5 numerical control flat grinding. The hydraulic valve is controlled by CNC, which drives the longitudinal adjustable speed movement, the horizontal and the grinding head feed with the ball screw pair, and the DC servo motor. Drive, intermittent grinding wheel dressing, CRT graphic simulation display. At the same time, it can also be equipped with other types of CNC systems to meet the requirements of different users.

At present, with the continuous improvement of semiconductor integration, the newly introduced system is getting smaller and smaller in appearance, more and more compact in structure, and in functions, remote communication, remote diagnosis, multi-machine networking, etc. are added; the operation interface is closer to the WINDOWS system, Add mouse, remote control and other operating parts. FANUC company this year mainly launched 18I, 16I, 20I, 21I systems, SIEMENS is 840D, 810D, 802D are all compact systems. There are also some manufacturers such as the PA8000NT series CNC controller developed by Taiwan Precision Machinery Research and Development Center, which uses the WINDOWS NC operating system and the NT real-time multiplexing processing core. The processing speed of a single program can reach 2000 blocks/sec. The number of reading processing can reach 1000, with AART (pre-adaptation adjustment technology) and parameter optimization learning function, which can make the following error approach zero. The software processing path filter can reduce the acceleration caused by excessive changes in the cutting process. The generated mechanical resonance can improve the surface roughness; it is flexible to use the servo, with a -10V analog servo interface, and provides the international standard SERCOS digital servo communication interface; the PLC program is designed with ladder diagrams, structure statements, function blocks, and instruction codes Five grammars such as, flow chart, etc., are convenient for design, communication and maintenance; with computer remote communication, instant remote maintenance function; control axis and spindle can be extended to 64 axes at most, I/O points can be extended to 792/528 points, using Pentium Processor, high-speed PLC processing speed reaches 25K.

In addition to the well-known professional CNC system factories such as SIEMENS, which have developed and produced many systems suitable for surface or profile grinding, some flat grinding manufacturers themselves have also actively developed CNC systems suitable for their grinding machines. There are:
The SINUMERIK 840D system of Siemens, which has more than 20 servo axes, coordinate continuous stroke control, manual data input or input through an external computer, remote diagnosis, can change the stroke as the diameter of the grinding wheel decreases, and the amount of grinding wheel dressing is automatically compensated. Ball screw clearance error compensation, etc. The Siemens 3G system is specially developed for grinding processing. It is equipped with an operation prompt device for man-machine dialogue. When the axis is tilted, linear and arc interpolation can also be performed. The operation cycle that often occurs in grinding, such as Spindle swing, use external signal to interrupt execution program, grinding wheel cut-in, grinding wheel dressing and other special preparation functions, and compile canned cycle programs. It can not only use an external measuring device (switch signal), but also directly control the device and compare the final size when a suitable measuring head is connected.

The 8400CNC and 8600CNC series produced by the American ALLEY-BRANDLY company are suitable for lathes, milling machines and grinders. The 8400CNC can control up to 6 servo axes, any 2 axes can be used for circular interpolation, and any 3 axes can be used for helical interpolation. , 6-axis linear interpolation. The 8600CNC series can control up to 17 coordinates, including 8 participating interpolation axes, 8 bit control axes and 1 spindle. It has functions such as graphic display, extended branch program, display processing time, high-speed program verification, and tool life monitoring.

UNICON system jointly developed by German ELB company and university. The surface and profile grinding CNC system developed by Japan’s Okuma Iron Works OSP5000G-G, OSP30-NF, etc., its OSP5000G-G can control up to 9 coordinates, of which 6 coordinates can be linked, with 12-inch color display, man-machine Dialogue programming, automatic determination of cutting coefficient, can be input by floppy disk, incorporated into the FMS system, the minimum pulse equivalent, movement equivalent and detection equivalent are all 0.1μm, and the inductive synchronizer full-closed loop method is also used for flat grinding.

Although some flat grinding manufacturers use the system of the CNC OEM, they develop their own software, which is more suitable for surface and profile grinding. For example, the German JUNG company uses Siemens SINUMERIK 810 as the basis, uses the company’s special software, and uses JUNG KONTUR to program The language performs shaping and dressing of the grinding wheel, and has graphics auxiliary operation functions. Japan’s Okamoto company developed the OPL language for grinding processing on the FANUC company’s CNC system hardware, and so on.

Today’s linear motors, dynamic balance and other technologies and processes are increasingly developed, which have greatly improved the ergonomics of machine tools. The development and utilization of CNC systems by suitable measurement technology applications has enhanced the electrical automatic control functions of machine tools.

The CNC grinder produced by ANTS MACHINE has the advantages of stable performance and strong component reliability. More importantly, the ANTS MACHINE CNC grinding machine manufacturer has a strong technical force and experienced after-sales engineer team, which can provide our customers with 24-hour online services. Any technical questions about grinding machines will be perfectly answered. When you buy a grinder, you can find ANTS MACHINE for CNC grinders. For details, please contact contact@antsmachine.com

Tags: CNC grinder, CNC surface grinder, CNC centerless grinder, CNC internal and external cylindrical grinder, CNC vertical universal grinder, CNC coordinate grinder, CNC form grinder