Measuring and control system of thermocompression equipment with regulated temperature and speed parameters of deformation

The problems that arise when using an automated control system for the operation of thermocompression deformation equipment are considered. The automated system under consideration is designed to control the nature of the metal flow during the formation of geometrically complex products under conditions of isothermal forging and forging in a state of superplasticity. The identified problems include non-compliance with the temperature and speed parameters of deformation, the inertia of the system, the complexity of reconfiguring the system in the manufacture of parts from different materials, when switching to the use of other equipment. To overcome the inertia of the system, it is proposed to use digital extropolation algorithms based on the experimental recording of the actual characteristics of the stroke of the operating elements of the installation when exposed to current, depending on its strength and duration of exposure, and the use of modulo-width modulation to control the current supply to the heating elements. Changes have been made to the hardware of the automatic control unit and to the TermoControl 3.1 Alpha application program. As a result of the research, a new improved version of the TermoControl 3.7 Alpha program was created, which ensures high accuracy in observing the temperature and speed parameters of stamping: deviation from the specified heating parameters (error) is up to 2–4 °С; deformation rate error – up to 0.1·10–3 mm/s. As a result of the work carried out, an extensive database of heating, holding, and cooling modes was created, based on the results of predicting the course for thermocompression equipment of various types and models. The results obtained made it possible to achieve that deviations from the specified modes of heating and deformation when using an improved automated control system fi t within the framework of the usual statistical error.

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