2024-03-29T13:23:04Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/884092023-06-09T10:26:20Zcom_10234_7034com_10234_9col_10234_8619
Repositori UJI
author
Abellán-Nebot, José V.
author
Liu, Jian
author
Romero Subirón, Fernando
2014-03-25T08:45:10Z
2014-03-25T08:45:10Z
2013-06
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. 485-498
0166-3615
http://hdl.handle.net/10234/88409
http://dx.doi.org/10.1016/j.compind.2013.02.005
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.
eng
Copyright © 2013 Elsevier B.V. All rights reserved.
stream-of-variation
variation propagation
process-oriented tolerancing
machining-induced variations
tool replacement
fixture maintenance
Process-oriented tolerancing using the extended stream of variation model
info:eu-repo/semantics/article
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