Abstract
The deflection system influences the hardening results of the wheel set plasma hardening unit. The aim of the study is to determine the dependence of the deflecting system impact on the plasma-forming process and the result of wheel set hardening. To analyze and compare the deflecting system parameters, the article uses the methods of simulation and experimental launches on the operating unit UPZG-2P. The operation principle and the main aspects of the plasma hardening unit are described. The control scheme and setting of pulse-width modulation in the Proteus VSMMPLAB environment have been developed and modeled. The control program written in the machine-oriented language, assembler, which rejects systems for experimental launches of the installation, has been corrected. Experimental launches of the plasma hardening unit were carried out in order to determine the correspondence of the required hardening parameters depending on the change in the deflecting system parameters. It is shown that when the shape and frequency of the current change, the hardening parameters change, the dependences of the hardening results and the deflecting system parameters are indicated. After analyzing the obtained parameters of modeling and experiments, it was noted that when the current frequency of the deflecting system changes, the width of the hardened layer changes, the change in the current shape of the deflecting system depends on the energy concentration distributed over the hardening area.
Keywords
Plasma hardening, tread, wheel set, plasmatron, indirect plasmatron, direct plasmatron, deflecting system, frequency, current shape.
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