Intellectualization of Control Processes and Monitoring of Electric Contact Heating During Restoration of Disc-Type Parts

Abstract

We have obtained a modified function of transforming intelligent sensor of contact surface temperature (IS CST) of electric contact “forming the electrode-part” and having a significant influence on quality of restoring the cutting edge of discs of tillage machinery which may only slightly exceed recrystallization temperature of the material of the part. Setting the sensor to restore a specific part is achieved by developing and programming on the microcontroller the function of converting and storing the intelligent system of standard parameters in the non-volatile memory. The re-search goal is to clarify the function of transforming IS CST and to substantiate the opportunity of its application for solution of the set task of control and monitoring. We have provided a schematic diagram of a plant for electrocontact restoration of the cutting capacity of disk tillage tools. The entire restoration process is divided into two stages: static one (without rotating the part) with duration of 1-2 seconds when temperature is monitored in the dynamic mode; and dynamic one, with the set rotation speed of the disc. As a physical analogue of the process, we have considered an “electrode-part” flat contact with a center-located thin com-pound bar thermally insulated at the ends and on the side surface. In addition, a numerical experiment is used to show that introduction to the original polynomial transfor-mation function with three correction indexes enables to reduce the methodological error of measurementsof the contact surface temperature to 0.5°C in the time interval from 1.2 seconds to 1.9 seconds (the electrode material is electro-ceramics).