Research On Multi-station Progressive Die Design Of Low-voltage Molded Case Circuit Breaker Bracket Parts

In recent years fast development of the electric power industry promote new requirements of the low-voltage circuit breaker manufacture. For low-voltage circuit breaker more than 70% of parts are cold stamping, then multi-position progressive die has great advantage in produce of the low-voltage circuit breaker. Due to complexity and high cost of multi-position progressive die, requirement of designer is very high and the period of design is relatively long, which will weaken the competition of the company. Then research of the multi-position progressive die is necessary.In this study design of the multi-position progressive die is investigated for key parts of the low-voltage circuit breaker. The main research contains following works:At first the typical sheet metal forming technology of supporting structure is analyzed, which can provide the basis of design of progressive die and theory calculation.Secondly, by using TRIZ evolution theory the improvement of system design is investigated. Optimization and innovation scheme is provided for multi-position progressive die. Integration of die structure is studied and evolved to the super system. The general die-set is designed for stamping equipment to satisfy the requirement of producing the typical parts. The fuzzy comprehensive method is used to evaluate the innovation scheme.Finally by analyzing the general design process of progressive die and combing innovation scheme, the standard system and design process of multi position progressive die is established. Design scheme of a certain supporting structure of progressive die can verify the validity of above standard system and design process. The results show that the optimized scheme can greatly decrease produce cost and shorten period of design and manufacture.With continuous development of equipment manufacturing industry, localization rate of construction installation equipment will be improved. Then the research of multi position progressive die will have wide range of potential application.