THE INFLUENCE OF THE MEASURING CONVERTERS CHARACTERISTICS FOR THE DETAILS PROCESSING ACCU-RACY IN MACHINE TOOLS WITH MULTI-LOOP CONTROL SYSTEMS

The purpose of research is improving of manufactural parts accuracy by cutting in machine building and repair industry. One of the ways of increasing the machining accuracy is equipped with systems of active monitoring and automatic control of dimensions of parts. To create such systems requires the development and implementation of transducers (sensors), controlling the parameters of the geometry of the part, the condition of the cutting tool and the implementation of technological operations in real time. Such transducers can be implemented by different physical principles, but they must have performance parameters and characteristics that meet certain requirements. To ensure the effective operation of control systems and management of the necessary information, usually from several transducers, whose signals are usually summed and compared with the preset values. The article presents the description of the active control system and automatic control of the dimensions of the part using a half-bridge schematic of the pneumatic measuring converter and the procedure for their work. Various schemes were reviewed of summation of the output signals of transducers, and especially the testing of signals mismatch. It is shown that if connected regulation, additional error of machining parts in machine tools is not due to identical characteristics of transducers. Dependence for assessment of this component of the error was processing. Thus, the proposed active control systems, and automatic control of dimensions details using half-bridge schematic of the pneumatic measuring converter implies several requirements: when connected control increased requirements to the identity of the metrological characteristics of transducers; to exclude the influence of identity characteristics for the accuracy of details flowing part of the primary transmitters must be calibrated in terms of pressure and flow rate of the working environment.

precision, control, accuracy, handling, converter