Design of a constant-force snap-fit mechanism for minimal mating uncertainty

Chen, Yi Ho; Lan, Chao-Chieh

doi:10.1016/j.mechmachtheory.2012.04.006

Cited by 47 publications

(16 citation statements)

References 19 publications

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“…If the clearance value is lower than the threshold designed, it can result in damage of connection or connecting elements. Therefore, the authors in paper [54] proposed a solution that in the misfit range of ±0,3 mm allows to keep a constant value of the closing force.…”

Section: The State Of Art In Designing Of the Socket-pin Connectionsmentioning

confidence: 99%

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The Influence of Geometrical Parameters in Socket - Pin Connections on the Value of Opening Force / Wpływ Parametrów Geometrycznych W Połączeniach Typu Gniazdo - Trzpień Na Wartość Siły Otwierającej

Sadowski¹,

Golewski²

2015

Archives of Metallurgy and Materials

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The paper presents an analysis of the influence of a number of technological aspects of both the socket and the pin on the value of the force required for joint disconnection. A number of numerical simulations were made in Abaqus program to examine effects of such parameters as: presence of an interference fit, use of spherical latches, application of different rigidity of the pin by making cuts with variable width and length, use of different angles of inclination of the working part of the connection. Models of different simple joints presented in this work, can also operate in large structures forming panels of aircraft structures. For this purpose one of the analyzed geometry of the connection was applied to create a 3-D panel model of the structural element in CAD - SolidWorks program. All analysed models with different geometries were subjected to simulation of opening process. The corresponding critical forces were estimated for the beginning of the failure process. The detailed discussion of all model parameters was included to specify their influence on the whole disconnection of joints. It should be noted that aerospace structures work under complex loading states and further numerical studies are required to extend the presented results.

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Section: The State Of Art In Designing Of the Socket-pin Connectionsmentioning

confidence: 99%

“…This results from necessity of a dense mesh to represent mechanical fasteners, a large number of contact pairs causing that the problem becomes highly nonlinear, necessity of using damage and fracture criteria (e.g. [51][52][53][54][55][56][57][58]) for both mechanical fasteners and adhesive.…”

mentioning

confidence: 99%

The Influence of Geometrical Parameters in Socket - Pin Connections on the Value of Opening Force / Wpływ Parametrów Geometrycznych W Połączeniach Typu Gniazdo - Trzpień Na Wartość Siły Otwierającej

Sadowski¹,

Golewski²

2015

Archives of Metallurgy and Materials

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“…Unlike rivets, bolts and nuts, snap-fits represent integral parts that aid in reduction of part counts as well as assembly time. 1,6–10 Snap-fits have popularly been used in lightly loaded applications such as toys and other consumer products. However, with improvement in polymer technology and huge advances in composite materials, snap-fit features can now be used in more demanding applications.…”

Section: Introductionmentioning

confidence: 99%

Modified analytical method to calculate the assembly and separation forces of cantilever hook-type snap-fit

Mose

Son

Bae

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, a new analytical method to calculate the assembly force and separation force of cantilever hook type snap-fit was proposed. Finite element analysis and experimental measurement were performed to verify the new approach. It was found out that the conventional analytical method had a few limitations. The solution was only applicable when the retention face angle was small, and there existed a critical value of retention face angle where separation force unreasonably decreased with increase in deflection. The new approach considered large deflection of retention feature and resultant moment term in addition to the previous method, and the solution was obtained explicitly. The new analytical solution could be applied to large face angles without any divergence, and showed good agreement with finite element analysis results. When the face angle was relatively small, both conventional method and new method showed reasonable results; however, when the angle was large, only the new analytical method showed reasonable results. Experimental investigations of forces during assembly and separation showed that the measured forces were much smaller than the predicted values by analytical methods and finite element analysis. The forces were strongly dependent on the rigidity of the mating part and the magnitude of radius at the edges of beam and mating parts. It was found from experiment that the separation force nonlinearly increased as clearance decreased.

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“…Girişim miktarı, Şekil 2'de görüldüğü gibi araç parçalarında kullanılan geçmeli bağlantılar ile elektronik sektöründe kullanılan plastik tırnakların montajında beklenen kalite seviyesi nedeniyle önem arz etmektedir. Buradan hareketle Chen ve Lan, çalışmalarında bahsi geçen birleşme yüzeyi ve tırnak ile karşılığının temas noktası iyileştiren sabit takmaçıkarma yüküne sahip bir geçmeli tasarımına yer vermişlerdir [3].…”

Section: Introductionunclassified

Plastik Parçaların Montajında Kullanılan Geçmeli Bağlantılar İçin Takma Çıkarma Yüklerinin İki Boyutlu Sonlu Elemanlar Analizleri Yardımıyla Belirlenmesi

Bahar

Şen

2019

Mühendis Ve Makina

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Günümüzde üretilen araçların hemen hemen hepsinde iç döşeme, araç dış stili, kapılar vb. gibi alt montaj gruplarında yer alan plastik parçaların montajı için vidalama ve yapıştırmanın yanında çoğunlukla esneyebilen ve takıldığında kilitlenen geçmeli tırnak ya da buton bağlantıları kullanılmaktadır. Bu tip bağlantıların kullanılmasıyla, ilgili plastik parça sökülebilir ve değiştirebilir hale gelmektedir. Tam da bu noktada, tırnak ya da buton bağlantıları için montaj ve demontaj esnasında oluşan takma-çıkarma yüklerinin hesabı, tasarım ve sonrasındaki doğrulama ile kullanım ömrü için en önemli parametre olmaktadır. Farklı tasarım alternatiflerinin en az prototip ve en hızlı şekilde değerlendirilebilmesi için sonlu elemanlar yöntemlerinden faydalanılmaktadır. Bu çalışmada, araç iç döşemesinde kullanılan plastik bir kaplamaya ait tırnak bağlantısı için takma çıkarma yükleri iki boyutlu sonlu elemanlar analizleri yardımıyla belirlenmiştir.

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Design of a constant-force snap-fit mechanism for minimal mating uncertainty

Cited by 47 publications

References 19 publications

The Influence of Geometrical Parameters in Socket - Pin Connections on the Value of Opening Force / Wpływ Parametrów Geometrycznych W Połączeniach Typu Gniazdo - Trzpień Na Wartość Siły Otwierającej

The Influence of Geometrical Parameters in Socket - Pin Connections on the Value of Opening Force / Wpływ Parametrów Geometrycznych W Połączeniach Typu Gniazdo - Trzpień Na Wartość Siły Otwierającej

Modified analytical method to calculate the assembly and separation forces of cantilever hook-type snap-fit

Plastik Parçaların Montajında Kullanılan Geçmeli Bağlantılar İçin Takma Çıkarma Yüklerinin İki Boyutlu Sonlu Elemanlar Analizleri Yardımıyla Belirlenmesi

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