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Research of Plasma Quenching System

Author: LiuBing
Tutor: YuGuangPing
School: Shenyang University of Technology
Course: Detection Technology and Automation
Keywords: Plasma arc quenching Switching power supply Micro controller system
CLC: TP23
Type: Master's thesis
Year: 2011
Downloads: 32
Quote: 0
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Abstract


This theme meets of the times, in order to save resources and improve resource utilization, to meet the requirements of sustainable development strategies. Will be a new surface hardening heat treatment method of the plasma used in the actual industrial production to make research and laboratory equipment to improve existing or redesigned to meet the needs of the market for products. Making efforts to promote the products as soon as possible.Describes in detail the application of plasma arc characteristics and the field in the quenching process embodied the advantages of such technology at home and abroad. Analysis of its work process, and as a starting point on the control circuit to make a number of improvements, redesigned the quenching power. Improved by laboratory demonstrated the feasibility of the design and quenching power. Main tasks are the following.Redesign of the quenching power. Quenching power is based on the new switching power supply controller UC3875 phase-shift full-bridge resonant quenching of forward power. Quenching power needed to fully meet the performance parameters and target hardening of the workpiece. Improving control system feedback loops quenching circuit design. Analysis of the original use of the feedback circuit of irregularities, which to re-design, both in theory and in practice between was compared. Confirming the feasibility of new designs. Parallel communication with the analog-digital converter to replace the original high-precision analog serial communication digital converter, the control accuracy without changing the conditions to improve real-time control system, the control system becomes more stable and reliable; To increase the output of the control system design of the control signal interference, analysis of the original design may appear to be in the actual working of the system of random factors, an increase of anti-interference circuit design to ensure the accuracy of the control signal. Improve the system stability; The re-design of the quenching power and, therefore, redesigned the quench system protection circuit; Completion of the improved control system software design includes the design of the main program, controls, and between the various parts of the device programming. Controller and each device complete the automatic control system hardening.

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