Matrix temperature control chip of thermal forming machine

Abstract

The invention discloses a matrix temperature control chip of a thermal forming machine, and relates to the technical field of temperature control of a sheet / plate thermal forming machine. The chip can be subdivided into seven processing units which mutually operate in parallel: an IO (Input Output) unit, a clock unit, a communication unit, a temperature field solving unit, a matrix decoupling control unit, a PID (Proportion Integration Differentiation) calculation unit and a PWM (Pulse Width Modulation) output unit, wherein the temperature field solving unit is used for pre-estimating overall temperature field distribution by using a priori temperature field solving function and a few of test point temperature values, so that the number of temperature test points can be effectively reduced; the PID calculation unit is used for calculating output of each control point by using a set temperature field and a test temperature field; and the matrix decoupling control unit is used for eliminating thermal transfer influence between each control point and the exterior and providing output correction for each control point, so that the control accuracy and the anti-interference property of the temperature field can be effectively improved. According to the chip, each unit program can be processed in parallel through an internal hardware circuit, the calculation speed is high, and the matrix temperature control chip is reliable in use.

Description

technical field [0001] The invention belongs to the field of material thermoforming equipment manufacturing, and relates to a special chip for temperature control of a sheet / plate thermoforming machine and a temperature decoupling control method in the forming machine. Background technique [0002] Thermoforming machines are commonly used heating equipment in industrial production. Usually, the molding objects are thermoplastic plates and sheets. The upper and lower ends of the thermoforming machine are equipped with ceramic heating chips that can be individually set for heating power. During work, the blank is heated to an elastic-plastic state at a certain temperature and then pressed and sheared to obtain a product. The temperature field control characteristic is the core performance index of the molding machine. Due to different molding materials and different thicknesses of sheets used, the control temperature is often different. Even for the same workpiece, the tempera...

AI Technical Summary

Problems solved by technology

Both patent (4) and patent (5) use artificial intelligence to update PID parameters, and do not consider coupling interference between control points

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