In the past 10 years, the machining accuracy of ordinary CNC machine tools has been increased from 10μm to 5μm, and the precision machining center has increased from 3~5μm to 1~1.5μm, and the ultra-precision machining accuracy has begun to enter the nanometer level (0.01μm).
In terms of reliability, the MTBF value of the domestic numerical control device has reached more than 6,000h, and the MTBF value of the servo system has reached more than 30,000h, showing very high reliability. In order to achieve high-speed and high-precision machining, the supporting functional components such as electric spindles and linear motors have been developed rapidly, and the application fields have been further expanded.
Of course, there are certain errors in actual machining. Numerical control machining error delta is composed of programming error delta, machine tool error delta machine, positioning error delta fixed, tool setting error delta tool and other errors.
Namely: △number plus=f(△edit+△machine+△fix+△tool)
