Methodology for a computer-aided design of shrink fits that considers the roughness and form defects of the manufacturing process

Boutoutaou, Hamid; Fontaine, Jean-François

doi:10.1007/s12206-015-0431-4

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…Solid surfaces in the physical world are composed of many rough peaks (i.e., microconvexities) of different sizes in the micro-scale [9]. In recent studies [10][11][12][13][14], it has been discovered that when rough surfaces come into contact with each other, the micro-convexities on the surfaces undergo mutual compression and shear wear, resulting in relatively high contact pressure and stress between the micro-convexities. In many cases, this causes deformation of the contact area between the two rough surfaces to exceed the material's elastic deformation range, resulting in failure or yielding, and changing the initial design interference [15].…”

Section: Introductionmentioning

confidence: 99%

A New Approach for the Relationship Between the Contact Stiffness and the Interference of Journal and Bearing Shrink-Fitted

Jin

Zhou

et al. 2023

Preprint

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Shrink-fit connections often experience detachment of the contact surface as speed increases, resulting in a separation distance that determines the interference fit. This study proposes a new approach to investigate the relationship between contact stiffness at the microscale and macroscopic interference in shrink-fit connections between the journal and bearing of high-speed spindles. A model for contact stiffness and macroscopic interference is established, and the results indicate that contact stiffness varies with interference due to the micro-convexity mechanism under compressive deformation. Therefore, the effect of speed should be considered when selecting appropriate interference design parameters. This study provides theoretical evidence to support the selection of optimal interference design parameters at multiple scales.

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Section: Introductionmentioning

confidence: 99%

A New Approach for the Relationship Between the Contact Stiffness and the Interference of Journal and Bearing Shrink-Fitted

Jin

Zhou

et al. 2023

Preprint

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“…Boutoutaou et al 19 modelled interference fits in FEM taking into account surface roughness using a homogenization technique and results showed good agreement with experimental results. Boutoutaou and Fontaine 20 proposed an FEM incorporating form defects and roughness defects in the design of interference (shrink fitted) assemblies, which is used to determine the specifications that consider the manufacturing process. However, the proposed computational method is not validated experimentally.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Raj

Bhatti

Dhanish

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Interference fits are commonly used in engineering for various applications. While the effect of many factors on the load-carrying ability of interference fits has been studied extensively, the combined effect of cylindricity, roundness and roughness does not appear to have been considered to that extent, and this paper is an attempt to remedy the situation. As a first step, finite element method was used to verify that there will be a reduction in the load-carrying ability due to the introduction of perfect geometrical deviations on the shaft. Thereafter, a detailed experimental investigation was carried out to study the effect of cylindricity and their joint effect with various other factors on the axial load-carrying ability of shaft–bearing interference fitted assemblies. A number of shafts of C40 steel of nominal diameter 20 mm were manufactured with varying cylindricity values and selectively assembled with standard deep grove ball bearings, thereby achieving interference fits with a grade of H7/u6 between them. The assembled specimens were tested on a Universal Testing Machine with a specially made fixture and the maximum extraction load determined. The effect of the various factors on the extraction load was examined using statistical methods. It was found that shaft cylindricity error did reduce the load-carrying ability of interference fits. The combination of interference, cylindricity and surface roughness was found to give the best prediction for extraction load. Certain other parameters were also examined, but they were not found significant.

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“…Diş profilinde oluşan değişimi hesaplamak için bir algoritma geliştirmiştir [8]. Boutoutaou ve Fontaine (2015) çalışmalarında sıkı geçme bağlantı tekniğinde, bağlantı sağlanmayan parçaların şekli ve yüzey kalitesi ile ilgili kısıtlı varsayımlara dayanan eski modellerin kullanıldığını belirterek sonlu elemanlarla analizinin yapılmasını önermişlerdir [9].…”

Section: Introductionunclassified

Mikro Modüllü Dişli-Mil Sıkı Geçme Bağlantılarında Mil Çapı ve Delik Toleransının Gerilme Dağılımına Etkisi

Tezel¹

2019

European Journal of Science and Technology

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Öz Makine tasarımı ve imalatında yaygın kullanıma sahip makine elemanlarından biri dişliler olup birçok alanda çeşitli boyutlarda dişli kullanımına ihtiyaç duyulmaktadır. Modülü 1mm ve daha küçük olan mikro modüllü dişliler ise, hassas ölçüm aletlerinde, savunma sanayinde ve makine imalatında önemli bir makine elemanı olarak kullanılmaktadır. Güç aktarımı sürecinde dişli yüzeyinde, dişte, dişli gövdesinde ve dişli-mil bağlantısında meydana gelen hasarlar, tüm makinenin normal çalışmasını etkilemektedir. Oluşan herhangi bir hasar yalnızca dişli ya da dişli bağlantısını değil, bu elemanla birlikte çalışan birçok makine parçasını da hasara uğratabilir. Mikro modüllü dişlilerin küçük boyutları nedeniyle dişli-mil bağlantısında sıkı geçme bağlantıları ön plana çıkmaktadır. Ancak bu konuda literatürde önemli eksiklikler bulunmaktadır. Tasarımcıların tüm sıkı geçme toleranslarını uygulamalı olarak denemesi hem vakit hem de ekonomik kayıplara yol açabilir. Bu sebeple analitik ve nümerik hesaplamaların, dişli göbeği mil sıkı geçme bağlantılarında önemi büyüktür. Bu çalışmada, farklı göbek çaplarına sahip 1mm modül, 6 mm genişlik ve 20 diş sayısına sahip bir mikro modül dişlide; farklı sıkı geçme toleranslarında oluşan gerilme dağılımları sayısal ve analitik olarak hesaplanıp karşılaştırılmıştır. Analitik ve sayısal çalışmadan elde edilen veriler birbiriyle uyum içerisindedir. Nominal çap arttıkça meydana gelen teğetsel ve radyal gerilme azalmaktadır. Ancak bu noktada zayıflayan dişli gövdesi meydana gelebilecek hasarlara açık konumdadır. Çalışmada kullanılan tüm nominal çap değerleri için dişli mil bağlantısından ötürü meydana gelen teğetsel ve radyal gerilme büyüklüğü H7/u6, H7/s6, H7/p6 şeklinde sıralanmaktadır.

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Methodology for a computer-aided design of shrink fits that considers the roughness and form defects of the manufacturing process

Cited by 6 publications

References 12 publications

A New Approach for the Relationship Between the Contact Stiffness and the Interference of Journal and Bearing Shrink-Fitted

A New Approach for the Relationship Between the Contact Stiffness and the Interference of Journal and Bearing Shrink-Fitted

Combined effect of cylindricity, roundness and roughness on axial load-carrying ability of interference fits

Mikro Modüllü Dişli-Mil Sıkı Geçme Bağlantılarında Mil Çapı ve Delik Toleransının Gerilme Dağılımına Etkisi

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