A numerically-controlled
machine tool
machining capacity evaluation method based on part characteristics is characterized in that first, a motion matrix and an error matrix of all
moving parts are established according to the
modes of motion of the parts of a
machine tool; then, the sequences of the matrixes are determined according to the connection relations between the
moving parts of the
machine tool, and position errors and posture errors of tools are obtained through matrix calculation, and the position errors and the posture errors are collectively called
pose errors; next, the characteristic errors generated by the
pose errors of the tools are respectively calculated according to the geometric shapes of the characteristics and the basis reference conditions of tolerance; finally, the characteristic
machining errors obtained through calculation are compared with the form and location tolerance required by characteristic design, and thus whether the precision requirement of the
machine tool is appropriate or not is determined. The fast and direct
machine tool precision level evaluation method is provided, so that the problem that the
machining capacity of the
machine tool is learned by technologists by means of experience or
trial and error in the numerically-controlled machining
programming is solved; the technological preparation efficiency is improved, the machining cost is reduced, and the numerically-controlled machining quality is guaranteed.