Expansion and reduction of thin-walled tubes using a die: Experimental and theoretical investigation

Almeida, B.P.P.; Alves, M.L.; Rosa, P.A.R.; Brito, Alberto Moreira Guerreiro; Martins, P.A.F.

doi:10.1016/j.ijmachtools.2005.08.018

Cited by 125 publications

(43 citation statements)

References 7 publications

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“…Almeida et al investigated the optimum expansion ratio to minimize the occurrence of tube crease [3]. Pervez et al analyzed the expanded tube thickness and the expansion force according to the expansion ratio [4].…”

Section: Introductionmentioning

confidence: 99%

The Role of the Process and Design Variables in Improving the Performance of Heat Exchanger Tube Expansion

et al. 2018

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Abstract:In the expansion process of a fin-tube heat exchanger, the process variables and shape of the expansion ball affect the deformation of the tube's inner grooves, the adhesion, and the expansion force. These factors influence the efficiency of heat transfer and the lifetime of the expansion equipment. Therefore, this study analyzed the influential variables of the tube expansion process as well as the expansion ball design through experiments and simulations. A new method was proposed to determine the severity of adhesion in the tube's inner grooves using the expansion force rate. Expansion experiments with Al tubes show that the expansion force decreases when using a lubricant with high viscosity and when the lubricant remains on the expansion ball for a longer duration. Finite element analysis was also performed to examine the expansion of Cu tubes, which showed that the expansion force was higher when using expansion ball shapes that have higher contact area between the ball and tube surface. The radius of curvature of the expansion ball also influenced the expansion force. However, increasing the ratio of the radial force to the expansion force increased the deformation of the tube's inner grooves.

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Section: Introductionmentioning

confidence: 99%

The Role of the Process and Design Variables in Improving the Performance of Heat Exchanger Tube Expansion

et al. 2018

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“…To impose such alterations, external forces with appropriate boundary conditions are applied. Tubular expansion, an indirect extrusion method, is an important manufacturing process, which is used in the production of a wide range of products ranging from house hold pipes to boilers and heat exchanger tubes [1,2]. In recent years, the expansion of circular tubes has drawn more and more attention in much more critical applications where accurate dimensions, smooth surface finishes, and long-term safe and trouble-free operations are of great importance such as catheters for medical application, passive energy absorbers in automotive industry, etc.…”

Section: Literature Reviewmentioning

confidence: 99%

Indirect Extrusion: A Multifaceted Approach of Sub-surface Tubular Expansion

Pervez¹,

Qamar²,

Al-Abri³

et al. 2018

Extrusion of Metals, Polymers and Food Products

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Extrusion and indirect extrusion is a very old manufacturing process used in multitudes of applications mainly focused on transportation, household and power industries. Indirect extrusion has found an interesting application in petroleum industry, which resulted in resolving many unsolvable issues over the last few decades. The current and expected future global demand for hydrocarbons became a driving force for researchers to find new comprehensive and cheaper solutions for hydrocarbon production. The challenges faced in oil and gas fields, while drilling, constructing and operating new and old vertical/horizontal wells, are many. The use of indirect extrusion for insitu expansion of sub-surface tubulars used in wells revolutionized the drilling and completion as opposed to one and half decade back. The emergence of solid expandable tubular technology has changed the basics of how we design and construct wells. The original development of the technology was to overcome the challenges faced by the petroleum industry to reach ultra-deep reservoirs, off-shore drilling, drilling in highpressure/difficult zones and repair/maintenance of old/ageing wells. However, it gained significant interest of researchers and operators in providing solutions to wide-range problems. The development of a computational framework using finite element method (FEM) enabled to determine the force required for expansion and resulting dimensional changes in final product, which is of direct assistance to the field engineers. The effect of friction and stress variations along contact surface is also determined.

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“…They understood the modes of deformation during the free curved internal and external inversion of tubes. Almeida et al [3] produced tubular parts by expansion and reduction process on thin walled tubes using a die. The authors established the formability principles by both experimental and simulation.…”

Section: Introductionmentioning

confidence: 99%

Design and Modeling Studies of Tube End Expansion using Response Surface Methodology

L. Venugopal

2018

IJMPERD

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Expansion and reduction of thin-walled tubes using a die: Experimental and theoretical investigation

Cited by 125 publications

References 7 publications

The Role of the Process and Design Variables in Improving the Performance of Heat Exchanger Tube Expansion

The Role of the Process and Design Variables in Improving the Performance of Heat Exchanger Tube Expansion

Indirect Extrusion: A Multifaceted Approach of Sub-surface Tubular Expansion

Design and Modeling Studies of Tube End Expansion using Response Surface Methodology

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