Efficient statistical analysis of geometric tolerances using unified error distribution and an analytical variation model

Chongying, Guo; Liu, Jianhua; Jiang, Ke

doi:10.1007/s00170-015-7577-1

Cited by 13 publications

(1 citation statement)

References 21 publications

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“…At the same time, the advantage is that the results obtained are more optimal than other statistical methods. Several ways to overcome the weaknesses of these methods, as well as the weaknesses of the worst-case and statistical-based tolerance analysis methods, have been proposed, one of which is the analytical method introduced by [18]. Another method of dimensional and geometrical tolerance analysis was introduced by [19].…”

Section: Introductionmentioning

confidence: 99%

Geometrical and dimensional tolerance analysis for the radial flux type of permanent magnet generator design

Hikmawan

Wibowo

Kasim

2021

J. Mechatron. Electr. Power Veh. Technol.

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Mechanical tolerance is something that should be carefully taken into consideration and cannot be avoided in a product for manufacturing and assembly needs, especially in the design stage, to avoid excessive dimensional and geometric deviations of the components made. This paper discusses how to determine and allocate dimensional and geometric tolerances in the design of a 10 kW, 500 rpm radial flux permanent magnet generator prototype components. The electrical and mechanical design results in the form of the detailed nominal dimensions of the generator components, and the allowable air gap range are used as input parameters for tolerance analysis. The values of tolerance allocation and re-allocation process are carried out by considering the capability of the production machine and the ease level of the manufacturing process. The tolerance stack-up analysis method based on the worst case (WC) scenario is used to determine the cumulative effect on the air gap distance due to the allocated tolerance and to ensure that the cumulative effect is acceptable so as to guarantee the generator's functionality. The calculations and simulations results show that with an air gap of 1 ± 0.2 mm, the maximum air gap value obtained is 1.1785 mm, and the minimum is 0.8 mm. The smallest tolerance value allocation is 1 µm on the shaft precisely on the FSBS/SRBS feature and the rotor on the RPMS feature. In addition, the manufacturing process required to achieve the smallest tolerance allocation value is grinding, lapping, and polishing processes.

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Section: Introductionmentioning

confidence: 99%

Geometrical and dimensional tolerance analysis for the radial flux type of permanent magnet generator design

Hikmawan

Wibowo

Kasim

2021

J. Mechatron. Electr. Power Veh. Technol.

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A prediction method of mechanical product assembly precision based on the fusion of measured samples and assembly feature fidelity samples

Qiu

Wang

et al. 2020

Int J Adv Manuf Technol

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Tolerance analysis by static analogy on 2D assemblies with fits and fasteners

Armillotta

2023

Int J Adv Manuf Technol

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In tolerance analysis, the effect of clearance fits is especially difficult to estimate because the mating parts are not necessarily in actual contact and can take an infinite number of relative positions. The treatment of these situations is allowed in most of the available methods, possibly introducing additional elements in the dimension chains with appropriate statistical assumptions. The paper provides a similar extension for the static analogy, a previously proposed method that converts the tolerance analysis problem into an equivalent problem of force analysis. The procedure represents each fit, possibly between patterns of features (e.g., fasteners and holes), with a proper constraint in the equivalent static model. The ability of the constraint to transmit forces and torques is determined according to the types and directions of misalignments allowed by the joint clearance. With simple rules, this avoids complications in the static model, which must include only the constraint between parts rather than the geometric details of the mating features. The extended method, currently limited to 2D dimension chains, is demonstrated on examples involving both dimensional and geometric tolerances. The comparison with existing methods shows the correctness of the proposed procedure. The simplicity of the workflow confirms the possibility, already demonstrated for the static analogy, of avoiding numerical simulations or even the use of computer-based tools.

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Efficient statistical analysis of geometric tolerances using unified error distribution and an analytical variation model

Cited by 13 publications

References 21 publications

Geometrical and dimensional tolerance analysis for the radial flux type of permanent magnet generator design

Geometrical and dimensional tolerance analysis for the radial flux type of permanent magnet generator design

A prediction method of mechanical product assembly precision based on the fusion of measured samples and assembly feature fidelity samples

Tolerance analysis by static analogy on 2D assemblies with fits and fasteners

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