Influence of punch geometries on the divided material flow in a double cup extrusion process

Noh, Jung Ho; Hwang, Beong Bok

doi:10.1007/s12540-013-6005-z

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…In various cold working processes, a combined forging is classified as an operation that merges similar or different sequences together into a single procedure [1][2][3]; it is aimed at process simplification and lead-time reduction by curtailing the number of processes required to obtain a forged component with a complicated shape [4,5]. Typical examples of the combined forging include backward-backward extrusion, forward-backward extrusion, and upsetting-forward operation [6][7][8][9]. In particular, backward-backward extrusion and forward-backward extrusion are collectively called "combined extrusion".…”

Section: Introductionmentioning

confidence: 99%

A Combined Cold Extrusion for a Drive Shaft: A Parametric Study on Tool Geometry

2020

Materials

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Parametric investigations related to shoulder angle on tool geometry for a combined cold extrusion of a drive shaft, which consisted of spur gear and internal spline structures, were conducted through three-dimensional FE (finite element) simulations. The drive shaft was required to be about 92.00 mm for the face width of the top land on the spur gear part and roughly 22.70 mm for the groove depth of the internal spline section. AISI 1035 carbon steel material with a diameter of 50.00 mm and a length of 121.00 mm was spheroidized and annealed, then used as the initial billet material. A preform as an intermediate workpiece was adopted to avoid the excessive accumulation of plastic deformation during the combined cold extrusion. Accordingly, the cold forging process involves two extrusion operations such as a forward extrusion and a combined extrusion for the preform and the drive shaft. As the main geometric parameters influencing the dimensional quality and the deformed configuration of the final product, the two shoulder angles of θ1 and θ2 for the preform forging and the combined extrusion were both considered to be appropriate at 30°, 45°, and 60°, respectively. Using nine geometric parameter combinations, three-dimensional finite element simulations were performed, and these were used to evaluate the deformed features and the geometric compatibilities on the spur gear structure and the internal spline feature. Based on these comparative evaluations using the numerically simulated results, it is shown that the dimensional requirements of the target shape can be satisfied with the shoulder angle combination of (45°, 45°) for (θ1, θ2).

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Section: Introductionmentioning

confidence: 99%

A Combined Cold Extrusion for a Drive Shaft: A Parametric Study on Tool Geometry

2020

Materials

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Finite element analysis for the geometry effect on strain inhomogeneity during high-pressure torsion

Lee

Kim

2014

J Mater Sci

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Application of central composite design for optimization of two-stage forming process using ultra-thin ferritic stainless steel

Bong

Barlat

Lee³

et al. 2016

Met. Mater. Int.

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Influence of punch geometries on the divided material flow in a double cup extrusion process

Cited by 5 publications

References 16 publications

A Combined Cold Extrusion for a Drive Shaft: A Parametric Study on Tool Geometry

A Combined Cold Extrusion for a Drive Shaft: A Parametric Study on Tool Geometry

Finite element analysis for the geometry effect on strain inhomogeneity during high-pressure torsion

Application of central composite design for optimization of two-stage forming process using ultra-thin ferritic stainless steel

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