Fixture Layout Design Based on a Single-Surface Clamping with Local Deformation

Tadić, Branko; Todorovič, P.; Novkinic, B.

doi:10.2507/ijsimm14(3)1.280

Cited by 8 publications

(7 citation statements)

References 28 publications

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“…Final machining of the axle pin should be performed in a machine shop equipped with a force vs. displacement controller M. Cvetić, N. Gubeljak Determination of Stresses in the Axle Pin Based on the Wind Model in the Wind Turbine system [29]. The axle pin as the most vital part of the wind turbine should be machined by applying a low feed and depth of cut, as reported in [30], in order to ensure low roughness of the machined surface. The best surface quality was achieved when the axle pin was fixed as a rigid body in the machining centre, as reported in [31,32].…”

Section: Discussionmentioning

confidence: 99%

“…Fig. 16 Finite elements, the ten node tetrahedron [27] Degrees of freedom of the tetrahedral finite element can be described by: 30 are approximation coefficients of the finite element. With the introduction of the coordinates' position of the node and corresponding displacements, the coefficients can be expressed by displacements in the nodes, which are obtained in SolidWorks.…”

Section: Determination Of Bearing Loadmentioning

confidence: 99%

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Determination of Stresses in the Axle Pin Based on the Wind Model in the Wind Turbine

Cvetić¹,

Gubeljak

2017

T FAMENA

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SummaryEven when all the details are provided, the design of wind turbines is a big challenge. The detailed knowledge of the deformation of vital wind turbine components caused by a wind with extreme operating gusts and other type of winds can be obtained only by performing measurements on the wind turbine. The vital component of the wind turbine is axle pin. This article presents the results of the measured changes in wind speed at the height at which strains were measured. The measured strains are used for calculating the stress. It is also shown that on the basis of the calculations on the wind model obtained with the GH Bladed software, the input data are obtained for the SolidWorks software, by which stress on the axle pin can be calculated. The final confirmation of the proper approach and the calculation is achieved by comparison between the calculated and the measured strains on the axle pin during exploitation of a wind turbine of nominal power output of 1 MW.

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Section: Discussionmentioning

confidence: 99%

Section: Determination Of Bearing Loadmentioning

confidence: 99%

Determination of Stresses in the Axle Pin Based on the Wind Model in the Wind Turbine

Cvetić¹,

Gubeljak

2017

T FAMENA

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“…A full 3D finite element model (FEM) was used to obtain the displacement, strain, and stress fields of the axle pin. 18 Finite element analysis has been performed by using the FE code ABAQUS. 19 Figure 6 shows the FEM used and the according to the Germanische Lloyd.…”

Section: Numerical Stress Analysismentioning

confidence: 99%

Application of structural integrity assessment procedure on an axle pin of a wind turbine

Gubeljak

Cvetić²,

Božić

et al. 2017

Fatigue Fract Eng Mat Struct

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The axle pin is one of the most critical components of a wind turbine. Because 2 bearings are mounted on the axle pin, it is not subjected to torque and is designed only to carry bending stresses. The axle is usually made by a casting process, which can induce defects. After casting of the axle pin, radial surface cracks were detected outside by ultrasonic and magnetic particle inspection. The first goal of this paper is to establish defect tolerance in the design of the axle pin, ie, at what critical crack size can we expect failure of the axle pin? The second aim is assessing the remaining lifetime of the defected axle pin used in operation of a wind turbine. Both issues are important to prevent unexpected failure and establish a system for on‐line structural health monitoring. This paper presents a procedure for the structural integrity assessment of axle pins by considering their material properties and fatigue crack growth parameters and comparing them with their fatigue design curve.

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“…Tadich et al [37] considered clamping the workpieces with complex geometry by using tapered wedges that allowed carrying out the parts machining from the five sides with one side locating. The results showed that stiffness of the system "fixture -workpiece" is insufficient for this locating method.…”

Section: Literature Reviewmentioning

confidence: 99%

Mathematical Model of the Fixture Flexibility Impact on Machining Accuracy of Levers

Іванов¹,

Dehtiarov²,

Pavlenko³

2016

AMS

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Flexible fixtures increasingly acquire an extension in up-to-date manufacturing engineering, albeit an attempt to determine the impact of the flexibility on the fixture accuracy parameters was not performed in previous research. The aim of this work is determination the opportunity to provide dimension accuracy for lever machining in the high-flexible fixture. Experimental values of displacements of the elements of the system "fixture-workpiece" for the different levels of fixture flexibility were obtained by means of finite elements analysis. On the example of levers machining it was stated that increasing the fixture flexibility allows receiving in a certain range the required dimension accuracy of the parts. Displacements were used for obtaining the mathematical model of the fixture accuracy depending on fixture flexibility. This model in case of levers machining describes by nonlinear function of evaluated flexibility indicators. The method of quasilinear evaluation of the parameters was used for identification the design flexibility by minimization of the total square deviation using the iteration procedure.

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Fixture Layout Design Based on a Single-Surface Clamping with Local Deformation

Cited by 8 publications

References 28 publications

Determination of Stresses in the Axle Pin Based on the Wind Model in the Wind Turbine

Determination of Stresses in the Axle Pin Based on the Wind Model in the Wind Turbine

Application of structural integrity assessment procedure on an axle pin of a wind turbine

Mathematical Model of the Fixture Flexibility Impact on Machining Accuracy of Levers

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