Optimization of Tooling Design for Hot Mandrel Bending of Pipe Elbows

Diekmann, Uwe; Homberg, Werner; Prehm, J.; Rostek, Tim; Schönhoff, Nils; Tabakajew, D.; Trasca, Andreea; Uysal, Haris

doi:10.4028/www.scientific.net/msf.918.159

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…Oh et al [10] examined the influence of tube blank shape on forming quality, but they did not explore the influence of process parameters on forming quality. Tabakajew and Homberg and Diekmann et al [11,12] discussed the influence of mandrel size on the quality of elbows. Guo et al [13] described the influence of three types of mandrels on the forming quality of an L-shaped elbow.…”

Section: State Of the Artmentioning

confidence: 99%

Design and Key Process Simulation of a New Type of Pipe Bending Unit

Qian¹,

Bai²,

Hu³

et al. 2021

Int. j. simul. model.

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The pipe bending mechanism was analysed and a new unit was designed to solve problems of low efficiency and high incidence of defects in large-diameter products. Subsequently, the workflow of the unit was formed, and the finite element model of elbow formation was established. A pipe with D = 60.3 mm and t = 3.05 mm was used as an example to simulate the effects of key parameters on the forming quality and determine the optimization parameters. Results show that as clearance increases within in a small range, the flowability of the pipe and the forming quality of the elbow improve. As the surface friction and push-bending speed increase, the quality gradually deteriorates and more defects appear. The mandrel helps enhance the forming quality of the elbow. The wall is thinner in the extrados near the push head but thicker in the intrados near the push head. The obtained conclusions provide a basis for establishing a quantitative relationship between the process parameters of bending machines and forming quality and the comprehensive optimization of the bending machine process.

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Section: State Of the Artmentioning

confidence: 99%

Design and Key Process Simulation of a New Type of Pipe Bending Unit

Qian¹,

Bai²,

Hu³

et al. 2021

Int. j. simul. model.

View full text Add to dashboard Cite

show abstract

“…At present, this process has been widely used in the production of transportation pipelines and metal structure parts. Plentiful studies are reported on this process by theoretical analysis, experimental research and numerical simulation [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Technological parameters optimization and numerical simulation of hot pushing pipe bending process

Huang

Zhang

et al. 2023

Int J Adv Manuf Technol

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Elbow pipes are widely used in many industries such as petroleum, chemical, metallurgy. Of various elbow pipe forming technology, hot pushing pipe bending process is an efficient and economical one for processing elbow pipes. This paper introduced the technological process and plastic deformation mechanism of hot pushing pipe bending. Four deformation assumptions were proposed to describe the main deformation characteristics in the bending process. The proportional relationship between the bending deformation and the diameter expansion deformation was derived and the horn mandrel was designed. The forming process of the elbow was simulated and the metal flow in the forming process of the elbow was obtained. By using orthogonal experiment, the influence rules of heating temperature, pushing speed, friction factor, bending angle and initial bending radius on the process were obtained, and the optimal process parameters were obtained. It will play a positive role in revealing the pipe forming mechanism and have a guiding effect on production practice.

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Influences on the extended length and performance of push bending for the GH4169 superalloy tube with small bending radius of 1D

Xiao

Zuo

et al. 2020

Int J Adv Manuf Technol

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Optimization of Tooling Design for Hot Mandrel Bending of Pipe Elbows

Cited by 6 publications

References 7 publications

Design and Key Process Simulation of a New Type of Pipe Bending Unit

Design and Key Process Simulation of a New Type of Pipe Bending Unit

Technological parameters optimization and numerical simulation of hot pushing pipe bending process

Influences on the extended length and performance of push bending for the GH4169 superalloy tube with small bending radius of 1D

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