Development and Application of Automatic Temperature Control System for Thermal Spraying Slender Rods

In order to reduce deformation during the processing of slender rods by thermal spraying and improve coating quality and processing efficiency， a temperature control system for thermal spraying of slender rods was developed based on programmable logic controller (PLC) automatic control technology， and the temperature automatic control during the spraying process of slender rods was achieved.Though the system，the performance of plasma sprayed Al2O3-13TiO2 ceramic coatings on three different temperature substrates was compared.Results showed that when the substrate temperature was controlled between 100～150 ℃， the deformation of the workpiece and the comprehensive performance of the coating were better.The automatic temperature control system could achieve continuous and uninterrupted processing of workpieces， which increased the production efficiency by 50%compared to the traditional thermal spraying method that relied on stopping the gun for cooling.