Intelligent Assembly for Aero Engine Components

Klocke, Fritz; Veselovac, D.; Auerbach, Thomas; Seidner, R.

doi:10.1007/978-3-540-88518-4_99

Cited by 11 publications

(8 citation statements)

References 2 publications

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“…27 This ensures that the component reference frame is attached to the centre of the base of the component and coincides with the global reference frame on the table. For the top surface of the component, the axial length is measured at fixed radius r x to determine the axial run-out.…”

Section: Representing Component Variationsmentioning

confidence: 99%

“…Each component is placed on a rotary table so that the lower mating surface of the component is concentric with the central axis of the rotary table – the so-called ‘table-axis’. 27 This ensures that the component reference frame is attached to the centre of the base of the component and coincides with the global reference frame on the table. For the top surface of the component, the axial length is measured at fixed radius r x to determine the axial run-out.…”

Section: Representing Component Variationsmentioning

confidence: 99%

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Geometric error reduction in the assembly of axi-symmetric rigid components: a two-dimensional case study

Hussain

McWilliam

Popov

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this article, the assembly of axi-symmetric rigid structures from imprecisely manufactured components is considered to produce a 'straight-build' assembly. The eccentricity of the assembly is improved by selecting the best relative orientation of each component and using four different strategies to control the assembly errors. The presentation is simplified by considering the assembly of two-dimensional structures, and the Monte Carlo simulation technique is used to quantify the propagation of random component variations on the resulting assembly. The axial and radial run-outs for each component are used to represent component variability and these quantities are represented as Gaussian random variables. The influence of component variations on the assembly is predicted using connective assembly models. Numerical results are presented for assemblies consisting of: (a) identical rectangular components; and (b) non-identical rectangular components. The results are compared with each other and those obtained using 'direct-build' assembly, which does not control the assembly errors. It is found that assembly variations can be reduced significantly using the proposed techniques.

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Section: Representing Component Variationsmentioning

confidence: 99%

Section: Representing Component Variationsmentioning

confidence: 99%

Geometric error reduction in the assembly of axi-symmetric rigid components: a two-dimensional case study

Hussain

McWilliam

Popov

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part B:

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show abstract

“…According to formula (14,16), take the two-stage rotor assembly as an example, that is, when = 2 and = 1, 1 is the adjustment phase of the lower-stage rotor relative to the upper-stage rotor. The direction is determined by the right hand.…”

Section: Solution Of Optimal Assembly Phasementioning

confidence: 99%

Assembly Accuracy Prediction And Optimization of Aeroengine Rotor Under The Separation Condition Of Assembly And Measurement

Wang

Sun

et al. 2021

Preprint

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The measurement and assembly of aeroengine rotor are separated from each other, the uncertainty of the test position leads to the test data cannot reflect the geometric characteristics of the rotor itself, which makes it difficult to accurately measure and predict the assembly accuracy. Combined with the fact that the geometric characteristics of parts / components are not related to the measurement datum, an assembly accuracy test and prediction method is proposed to reduce the datum deviation and ensure the consistency of test data. Firstly, the small displacement torsor is used to describe the datum deviation, the inverse matrix transformation is applied to reduce the datum deviation, and the datum independent matrix is utilized to express the pose characteristics of the parts / components, which provides the data basis for the accurate prediction of assembly accuracy. Then, the pose transfer model based on the datum independent matrix is established, which is more comprehensive and clearer than the traditional accuracy prediction model. Furthermore, a direct optimization method is also established, which is more efficient than the traditional genetic algorithm. The assembly experiment of aeroengine rotor shows that the model and method proposed in this paper are beneficial to reduce the coaxiality of the front and rear fulcrum and they can better reflect the geometric characteristics of the rotor itself. The related research also has reference significance for other large-scale and high-precision mechanical product assembly.

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“…To control the tolerance propagation in the assembly of cylindrical components, much work had been done. Klocke et al (2008) proposed an intelligent assembly system to allow the automated alignment of discs within a demanded tolerance range for the centric alignment of rotationsymmetric aero-engine components. Yang et al (2009Yang et al ( , 2013 presented the method of optimizing the assembly of component stacks by controlling component orientations, and investigated the straight-build assembly technique under different level of measurement accuracy and process noise, with the complexity and randomness of manufacturing and measurement processes taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

Improvement of location and orientation tolerances propagation control in cylindrical components assembly using stack-build assembly technique

Wang

Sun

Tan

et al. 2015

Assembly Automation

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2015),"Auto-body assembly process fault diagnosis based on a dynamic variation modeling approach", Assembly Automation, Vol. 35 Iss 4 pp. 302-308 http://dx. Access to this document was granted through an Emerald subscription provided by emerald-srm:368933 [] For AuthorsIf you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -This paper aims to provide an assembly method to improve cylindrical components assembly quality. The proposed method not only could be applied to tolerance allocation, but also could guide the assembly of cylindrical components. Design/methodology/approach -The paper claims to provide a stack-build assembly method using a connective assembly model to take the location and orientation tolerances of a rotor stage into account. Through the separate analysis of the location and orientation tolerances propagation process in the assembly, the quality of the final assembly of the rotationally symmetric cylindrical components assembly could be improved by properly selecting component orientations to minimize the eccentric deviation in the assembly. Findings -The effectiveness of the proposed stack-build assembly technique in improving the tolerance propagation in the assembly of cylindrical components was verified through experiments run with a measuring machine. A real aero-engine rotor was assembly using the proposed method; compared to the direct-build assembly technique, which had the component orientations without consideration, the stack-build assembly technique could be used to reduce the eccentric deviation in cylindrical components assembly by nearly 50 per cent. Originality/value -Different with the old methods, the new method defined the tolerances in detail, such as perpendicularity and angle of the lowest point, and could guide the assembly by the features of surfaces on different components. Through measuring the special tolerances of surfaces on the components, the best assembly angle for each component could be obtained.

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Intelligent Assembly for Aero Engine Components

Cited by 11 publications

References 2 publications

Geometric error reduction in the assembly of axi-symmetric rigid components: a two-dimensional case study

Geometric error reduction in the assembly of axi-symmetric rigid components: a two-dimensional case study

Assembly Accuracy Prediction And Optimization of Aeroengine Rotor Under The Separation Condition Of Assembly And Measurement

Improvement of location and orientation tolerances propagation control in cylindrical components assembly using stack-build assembly technique

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