Abstract
The Theory of Inventive Problem Solving (TRIZ), one of the most important innovation theories, was inadequate to identifying contradiction. Some researchers had been successfully conducted to address the issue. However, these researches focused on conceptual design which was a type of single factor problem, rather than casting process optimization which was a type of multifactors problem. Starting from systems thinking, this work for the first time proposed the systematic method for identifying contradiction of casting process, which enhanced the conversion capability from specific problem to standard problem whilst improved the feasibility of TRIZ. This method was validated by optimizing casting process of the intake manifold. The case study showed that the integration of the systematic method and solving tools of TRIZ increased the efficiency of casting process optimization. http://dx.doi.org/10.5755/j01.mech.17.4.579
Highlights
The theory of inventive problem solving (TRIZ), one of the most important innovation theories, has long recognized that the essence of solving problem is to eliminate the contradictions existing in technical systems, and has provided some tools to identify and remove these contradictions [1]
The S-Field model can be only used for identifying the contradiction of simple problem or the basic lowest level problem in a complex technical system
A good conceptual design that maintains the independent function requirements (FRs), should be uncoupled or decoupled so that we can deal with the design parameters which correspond to a given function requirement, without con-sidering other function requirements
Summary
The theory of inventive problem solving (TRIZ), one of the most important innovation theories, has long recognized that the essence of solving problem is to eliminate the contradictions existing in technical systems, and has provided some tools to identify and remove these contradictions [1]. The casting defects, either in microscale or in microscale, result from the multiple micro factors in which the effect intensity of one micro factor is not identical to others [11, 12] In this case, the casting process optimization is to solve a complex problem possessing multiple micro factors, i.e. two or more micro factors simultaneously affect single cause of problem. The systems approach is a scientific analysis method with three capabilities including optimization, simulation and restoration [13] Applying this method to analysis of casting process problem, the elements in the technical system, as well as their role and interrelation, can be effectively clarified. It is helpful to the decomposition of casting technical system and the identification of contradictions Motivated by this idea, we propose a method based on systems thinking for solving casting process problem.
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