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Measuring and Control System for Thermocompression Equipment with Regulated Temperature and Rate Parameters of Deformation

  • MECHANICAL MEASUREMENTS
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Measurement Techniques Aims and scope

Issues related to using an automated control system for the operation of thermocompression equipment are discussed. The automated system under consideration is designed to control metal flow during the formation of geometrically complex products under the conditions of isothermal and superplastic forging. The identified problems include noncompliance with the temperature and rate parameters of the forging process, the inertia of the system, the complexity of reconfiguring the system when manufacturing parts from different materials or when switching to the use of other equipment. To overcome the inertia of the system, it is proposed to use, on the one hand, digital extrapolation algorithms based on an experimental recording of the motion of operating elements under the influence of electric current, depending on its strength and duration of exposure, and, on the other, pulse–width modulation to control the current supply to the heating elements. Changes were introduced to modernize the hardware of the automated control system of a thermocompression unit and the TermoControl 3.1 Alpha software package. As a result, the updated version TermoControl 3.7 Alpha was created to ensure a higher accuracy in maintaining the temperature and rate parameters of the forging process. The deviation from the specified heating parameters (error) did not exceed 2–4°C; the error of the deformation rate comprised about 0.1·10–3 mm/s. An extensive database of heating, holding, and cooling modes was compiled, based on the results of predicting the operation of various thermocompression equipment types and models. The use of the developed automated control system allows the deviations from the specified modes of heating and deformation to range within the limits of statistical error.

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  1. Moscow Aviation Institute (National Research University), Moscow, Russia

    M. V. Zharov

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Correspondence to M. V. Zharov.

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Translated from Izmeritel’naya Tekhnika, No. 12, pp. 46–51, December, 2022.

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Zharov, M.V. Measuring and Control System for Thermocompression Equipment with Regulated Temperature and Rate Parameters of Deformation. Meas Tech 65, 917–922 (2023). https://doi.org/10.1007/s11018-023-02176-y

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