Process-oriented tolerancing using the extended stream of variation model
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Other documents of the author: Abellán-Nebot, José V.; Liu, Jian; Romero Subirón, Fernando
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comunitat-uji-handle3:10234/8619
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Title
Process-oriented tolerancing using the extended stream of variation modelDate
2013-06Publisher
ElsevierISSN
0166-3615Bibliographic citation
ABELLÁN-NEBOT, José V.; LIU, Jian; SUBIRÓN, F. Romero. Process-oriented tolerancing using the extended stream of variation model. Computers in Industry, 2013, vol. 64, no 5, p. 485-498Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S0166361513000201Subject
Abstract
Current works on process-oriented tolerancing for multi-station manufacturing processes (MMPs) have been mainly focused on allocating fixture tolerances to ensure part quality specifications at a minimum manufacturing ... [+]
Current works on process-oriented tolerancing for multi-station manufacturing processes (MMPs) have been mainly focused on allocating fixture tolerances to ensure part quality specifications at a minimum manufacturing cost. Some works have also included fixture maintenance policies into the tolerance allocation problem since they are related to both manufacturing cost and final part qual- ity. However, there is a lack of incorporation of other factors that lead to increase of manufacturing cost and degrade of product quality, such as cutting-tool wear and machine-tool thermal state. The allocation of the admissible values of these process variables may be critical due to their impact on cutting-tool replacement and quality loss costs. In this paper, the process-oriented tolerancing is ex- panded based on the recently developed, extended stream of variation (SoV) model, which explicitly represents the influence of machining process variables in the variation propagation along MMPs. In addition, the probability distribution functions (pdf) for some machining process variables are ana- lyzed, and a procedure to derive part quality constraints according to GD&T specifications is also shown. With this modeling capability extension, a complete process-oriented tolerancing can be con- ducted, reaching a real minimum manufacturing cost. In order to demonstrate the advantage of the proposed methodology over a conventional method, a case study is analyzed in detail. [-]
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Computers in Industry, 2013, vol. 64, no 5Rights
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