A CAD method for tolerance allocation considering manufacturing difficulty based on FMECA tool

Ghali, Maroua; Tlija, Mehdi; Aifaoui, Nizar; Pairel, Éric

doi:10.1007/s00170-016-9961-x

Cited by 29 publications

(21 citation statements)

References 35 publications

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“…The analytic hierarchy process (AHP) was applied to calculate the subjective weight. Using 1-9 and their backward count as the scale, the relative importance degree between indexes was subjectively provided by experienced professionals, and a judgment matrix (22…”

Section: Subjective Weightingmentioning

confidence: 99%

“…Goo et al [21] proposed an efficient systematic design methodology that combined the strengths of axiomatic design and FMECA, where the RPN was used as the reliability index. Ghali et al [22] proposed a computer-aided design model considering functional and manufacturing requirements in the early phase of digital mock-up via FMECA, where the RPN was used as the reliability index. More examples are available in [13,23,24].…”

Section: Introductionmentioning

confidence: 99%

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Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information

Yang

Guo

Tian

et al. 2021

Chin. J. Mech. Eng.

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Heavy-duty machine tools are composed of many subsystems with different functions, and their reliability is governed by the reliabilities of these subsystems. It is important to rank the weaknesses of subsystems and identify the weakest subsystem to optimize products and improve their reliabilities. However, traditional ranking methods based on failure mode effect and critical analysis (FMECA) does not consider the complex maintenance of products. Herein, a weakness ranking method for the subsystems of heavy-duty machine tools is proposed based on generalized FMECA information. In this method, eight reliability indexes, including maintainability and maintenance cost, are considered in the generalized FMECA information. Subsequently, the cognition best worst method is used to calculate the weight of each screened index, and the weaknesses of the subsystems are ranked using a technique for order preference by similarity to an ideal solution. Finally, based on the failure data collected from certain domestic heavy-duty horizontal lathes, the weakness ranking result of the subsystems is obtained to verify the effectiveness of the proposed method. An improved weakness ranking method that can comprehensively analyze and identify weak subsystems is proposed herein for designing and improving the reliability of complex electromechanical products.

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Section: Subjective Weightingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information

Yang

Guo

Tian

et al. 2021

Chin. J. Mech. Eng.

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“…The objective is to integrate tolerance allocation into CAD models taking into account the functional requirements of the product which can facilitate its analyzing. In the proposed approach, the Failure Modes, Effects and Criticality Analysis method (FMECA) is used to allocate tolerances based on the manufacturing di culties [9].…”

Section: Literature Review On Cad Approachesmentioning

confidence: 99%

A Design Approach Of Mechanical Assemblies Based On MBSE And CAD Models Interoperability

Brahmi

Belhadj

Hammadi

et al. 2021

Preprint

Self Cite

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The technological development of the last decades have been able to push human to develop their needs, so a way to new demands were opened and this can lead to a complexity problem. Thereby, a good interoperability between the product design activities can lead to the possibility of ensuring a promising satisfaction to all requirements. However, the major problem is the enormous discontinuity between them. Indeed, each one treats the product from its point of view without recourse to the requirements defined by others. This paper is interested in the collaborative work that brings together the system engineer, who deals with the system from a global view, and the designer, who is a specialist in the detailed design, in order to validate requirements. A new methodology has been proposed to define the role of each one in the design process. This methodology focuses on the product development cycle from the analysis of needs to the validation phase. This obviously requires interoperability between the two domains of Model Based System Engineering (MBSE) and Computer Aided Design (CAD). Based on a pedal bicycle case study which is an industrial mechatronic product, the proposed methodology will be illustrated for validation and highlighting its advantages and limitations.

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“…Consequently, most applications of the functions use advanced allocation methods, such as genetic algorithms [62,[77][78][79][80][81][82][83][84][85], the bat algorithm [86], cuckoo search and particle swarm optimization [85], constraint networks [34,35], scatter search [87,88], pattern search [89], simulated annealing [90], a method based on Lambert W function [91,92], and fuzzy methods [93]. The function has also been used to solve problems with special formulations, such as interrelated tolerance chains [94,95], pre-selection of manufacturing processes [96], minimization of nonconforming fraction [97,98], allocation of geometric tolerances [99][100][101], minimization of cost and quality loss [102][103][104], robust design [105], simultaneous allocation of process averages and tolerances [106][107][108], multistation systems [109], and allocation combined with scheduling [110]. Approximate values assumed in literature for the variable cost parameters b and k are listed in Tab.…”

Section: Exponentialmentioning

confidence: 99%

Selection of parameters in cost-tolerance functions: review and approach

Armillotta

2020

Int J Adv Manuf Technol

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The paper deals with the cost-tolerance functions used in minimum-cost tolerance allocation on mechanical assemblies. The consistency of the cost-tolerance functions associated with different dimensions of a tolerance chain is a necessary condition for a correct optimization of tolerance values. This requires a careful selection of function parameters, in order to take into account all the variables influencing the cost, and thus to compare the costs of the different dimensions in a common scale. The cost-tolerance functions proposed in the literature are reviewed, revealing that the parameters are often selected without explicit reference to empirical data or objective rules. The development of procedures for parameter selection has been addressed in several studies, which are also reviewed along with the needed cost data published in textbooks and reports. Finally, an original approach is proposed to build cost-tolerance functions for combined processes, for which fewer results or methods are available. The parameters of a reciprocal power function, chosen for the favorable balance between accuracy and ease of use, are expressed through an empirical relationship with some design variables; these include the nominal dimensions, and the type and size of the part features involved in the allocation problem. An application example shows that the proposed procedure results in optimal tolerance values consistent with common design criteria.

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A CAD method for tolerance allocation considering manufacturing difficulty based on FMECA tool

Cited by 29 publications

References 35 publications

Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information

Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information

A Design Approach Of Mechanical Assemblies Based On MBSE And CAD Models Interoperability

Selection of parameters in cost-tolerance functions: review and approach

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