For NC machine, its precision main including geometry precision drive precision movement precision and location precision,, if appeared precision super poor, should according to artifacts precision reaction out of situation, with child various detection tool, judge out machine appeared of is which a of super poor, then on May caused this class errors of factors one by one check, according to judge, repair mechanical parts or through modified machine parameter of method, excluded effect precision super poor of factors. Wheel spindle runout and axial movement will seriously affect the cutting face runout and pitch error, affecting to indexing, and grinding wheel head rail parallel to the centerline of the workpiece errors will block until poor precision indexing plate will affect indexing accuracy. After test, find Wheelspindle runout, and center line of the wheel and the base material variance. To check the wheel spindle and guides, find Wheel spindle bearing and slide wheel has agreat wear, adopting a method of replacement parts replacement.
Therefore, the design of a fuzzy controller with two inputs and one output to realize fuzzy control, fuzzy controller of fuzzy, fuzzy-inferential decision and defuzzification composition, its main role is to realize fuzzy algorithm, fuzzy controllers are divided into special and general categories. If the choice of fuzzy controllers, although fast reasoning, but it is expensive, and flexibility. We use the universal fuzzy controller, if the software run by single chip microcomputer fuzzy-inferential decision, take some time, will result in poor real-time problems. If offline in advance of blur and fuzzy-inferential decision defuzzification, obtain a fuzzy control table, and thenplace this sheet in the single-chip microcomputer. Control, by table look-up control output, you can solve the problem of poor live.
In order to improve the machining accuracy of NC machine tools and efficiency ofNC machine tool tanks must be in a certain range of temperature control. On one hand, oil temperature changes, direct influence of temperature field change, whilechanges in temperature and the change of displacement, displacement fields, inevitably affects the processing precision.
The other hand, the temperature changes affect the viscosity of the oil. In General,the temperature rises, the viscosity of the oil drop. The viscosity is too high, too much resistance, negative hydraulic pump starting and working; the viscosity is too low, easily lead to oil leakage, affecting the stability of the whole hydraulic system. In addition, the temperature is too high, can affect the life of hydraulic componentsand change characteristic of hydraulic oil. Tank temperature fuzzy control principleof any inherent ambiguity. Even can be defined as the values, therefore, launcheda set of theories, known as fuzzy math. Fuzzy fuzzy control is an important branchof mathematics. When dealing with complex issues, and closer to the objective laws of fuzzy theory, especially for time-varying, large time delay control, fuzzy control for more accurate than traditional control. Based on the fuzzy control based on human experience, to control object does not need to have a precise mathematicalmodel. Hydraulic oil tank temperature control for CNC machine tools, the operatoris generally easily observed that actual output temperature and the difference between the set temperature and temperature changes.
