Compared to lathes, milling machines, etc., surface grinders adopted CNC systems relatively late because of their special requirements for CNC systems. In the past decade, with the help of CNC technology, the continuous dressing, automatic compensation, automatic wheel exchange, multi worktable, automatic conveying and clamping of grinding wheels on grinding machines have been achieved, and CNC technology has gradually become popular in surface grinding machines. In recent years, CNC grinding machines have accounted for the majority of the grinding machine exhibits at large-scale machine tool exhibitions in Hanover, Tokyo, Chicago, and China. Grinding machine manufacturers such as Germany's BLOHM and ELB no longer produce ordinary grinding machines, and Japanese companies such as Okamoto and Nikko also produce full-featured CNC flat grinding in batches. While developing CNC flat grinding, they actively develop mid-range and low-end CNC flat grinding.
Grinding machine, with vertical and horizontal CNC axes and vertical hydraulic control. The grinding wheel dressing uses diamond rollers installed on the worktable, with a wide range of applications; The SUPER-BRILLIANT series is a three coordinate CNC flat and forming grinder. The bed is made of natural granite with high geometric accuracy, and the guide rail is a linear rolling guide rail. The mechanical drive has no backlash, ensuring that the workpiece has a good surface finish; BRILLIANT-FUTURE is an improved product of the above two series. The bed is made of artificial granite, with static pressure guide rails and toothed belt transmission for the longitudinal direction, preloaded linear rolling guide rails for the vertical and transverse directions, ball screw transmission, three-axis CNC controlled AC servo motor, and a measurement resolution of 0.5 μ m. At the same time, ELB company has developed grinding machine products with contemporary new technologies, namely the CAM-MASTER series flexible grinding processing unit based on mechatronics and computer technology, the CAD-MASTER series and the COMPACT-MASTER series grinding processing center. The control axis can reach 24 axes. In addition, due to the implementation of modular design, the manufacturing cycle of specialized grinding machines has been shortened. ELB company has also developed various specialized grinding machines, such as the SFVG100/2 specialized grinding machine, which has the functions of tilting grinding head, continuous dressing, slow feed, and oblique cutting grinding. It uses eleven CNC control axes, like one grinding processing center. The British company JONES&SHIPMAN and the American company A-B have developed the A-B8600 CNC system for the FORM5 CNC flat grinding. The system is controlled by a CNC hydraulic valve, which drives longitudinal adjustable speed movement, and uses ball screw pairs for lateral and grinding head feed. It is driven by a DC servo motor, intermittent grinding wheel dressing, and CRT graphic simulation display. At the same time, other models of CNC systems can also be used to meet the requirements of different users.
At present, with the continuous improvement of semiconductor integration, newly launched systems are becoming smaller in appearance, more compact in structure, and have added functions such as remote communication, remote diagnosis, and multi machine networking; The operating interface is closer to the WINDOWS system, with the addition of operating components such as a mouse and remote control. FANUC company will mainly launch 18I, 16I, 20I, and 21I systems this year, while SIEMENS has 840D, 810D, and 802D, all of which are compact systems. Some manufacturers, such as the PA8000NT series CNC controller developed by the Taiwan Precision Machinery Research and Development Center, use the WINDOWS NC operating system and NT real-time multitasking core. The processing speed of a single program section can reach 2000 blocks/second, and the number of pre read processing per section can reach 1000 blocks. It has AART (pre adaptive adjustment technology) and parameter learning functions, which can make the following error approach zero. The software processing path filter can reduce mechanical resonance caused by excessive acceleration changes during cutting, thereby improving surface roughness; Flexible servo configuration, equipped with -10V analog servo interface, and providing international standard SERCOS digital servo communication interface; PLC program design includes five syntax types: ladder diagram, structural statement, functional block, instruction code, and flowchart, which facilitate design, communication, and maintenance; Equipped with computer remote communication and instant remote maintenance functions; The control axis and spindle can be expanded to 64 axes, and the I/O points can be expanded to 792/528 points. The Pentium processor is used, and the high-speed PLC processing speed reaches 25K.