Optimal tolerance allocation in mechanical assemblies using Fuzzy Logic essay
The high geometric accuracy requirement of precision machine tools poses a challenge to the tolerance design and planning of the assembly process that ensure the accuracy of the final assembly. Component tolerances must be assigned in conjunction with assembly processes. However, tolerance design and assembly. The proposed tolerance redesign model can be used for mechanical assembly with better economic effect and higher reliability, and it is shown to reduce the overall cost. 93 and the reliability of installation improves. 12. The purpose of this article is to present a new method for redesigning dimensional and geometric tolerances of. AbstractTolerance allocation is the process of determining allowable dimensional variations in product parts and subassemblies and processes fixtures and tooling to meet the quality and cost of final assembly goals. Traditionally, tolerance allocation is performed by solving a single optimization problem. This optimal tolerance allocation plays a crucial role in minimizing the. The allocation of tolerances between the components of a mechanical assembly can significantly influence the result. This technique uses a combination of fuzzy logic to evaluate production problems and a simulated annealing algorithm to optimize. Tolerance allocation is an important issue in the production of products, which on the one hand ensures the interchangeability of parts in an assembly and on the other hand has a major impact on the. This paper presents a new method based on evolutionary algorithms Elite Non-dominated Sorting Genetic Algorithm NSGA-II and Differential Evolution DE for the sensitivity-based conceptual design and tolerance allocation for mechanical assemblies. The approach I of this article moves the nominal values from non-critical values. The allocation of design tolerances between the components of a mechanical assembly and manufacturing tolerances can significantly affect the functionality of products and associated production costs. In fact, knowing how to efficiently allocate tolerances for assembly parts in a computer-aided design CAD and computer-aided manufacturing CAM system is a very important issue because the costs and. Huang and Shiau 2009 introduced an approach for the optimal tolerance allocation of mechanical assemblies considering production costs, quality loss and design reliability. Quotation Tolerance Allocation of Assemblies Using Fuzzy Extended Evaluation and Decision Support Processes at the Design Automati on Conference, Part s A and B, 2010. 7 Abhishek Kumar. This model is suitable for tolerance analysis of mechanical assemblies with linear and angular tolerances. Based on the fuzzy concept, a new index is introduced, the assembleability index, which indicates the appropriate quality of parts in the assembly. Graphical and numerical representations of tolerance assignment through this. This model is suitable for tolerance analysis of mechanical assemblies with linear and angular tolerances. The presented method is compatible with current sizing and tolerance standards. This article presents a tool for optimal tolerance allocation, based on quantification of production problems using tools for the study and analysis of design or process reliability, such as. Wu and Rao 11 proposed a fuzzy-based approach using.