Cutting parameters in dies for sheet metal through inclined, concave, and convex shapes in round punches

Cabrera, Víctor Hugo; Quillupangui, Willan; Juiña, Luis; Valdez, Marco

doi:10.1016/j.matpr.2021.07.437

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…In addition, to ensure the reliability of the results, measurements of five die cuts were taken for each parameter combination. Similar parameters have been used in other studies, obtaining optimal results [7,[27][28][29].…”

Section: Experimental Punching Testsmentioning

confidence: 88%

“…Among the metal forming processes, in operations such as stamping and bending the aim is to plastically deform the part, while in case of die cutting the aim is complete rupture. The shear stresses generated by the penetration of the punch [7] cause the damage phenomena and crack propagation in the material before complete rupture. Several parameters such as material hardening, damage evolution or crack initiation and propagation can be used to describe the behavior of the part in the working conditions [8].…”

Section: Introductionmentioning

confidence: 99%

“…Crack formation in the components may start because of localized plastic deformation appearing near the edges of the punch and die. With punch advancement, these localized cracks at the tool edge (die and punch) propagate through the sheet thickness and lead to a complete separation of the material [3,7]. There are many factors that affect the performance of the sheet metal stamping process, among which the following can be highlighted: shear force, clearance, sheet thickness and material, tool geometry, clamping force, design of the part to be stamped, penetration rate and punch alignment [9].…”

Section: Introductionmentioning

confidence: 99%

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Study and Optimization of the Punching Process of Steel Using the Johnson–Cook Damage Model

Claver,

Acosta,

Barba

et al. 2024

Metals

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Sheet metal forming processes are widely used in applications such as those in the automotive or aerospace industries. Among them, punching is of great interest due to its high productivity and low operating cost. However, it is necessary to optimize these processes and adjust their parameters, such as clearance, shear force or tool geometry, to obtain the best finishes and minimize crack generation. Thus, the main objective of this research work is to optimize the punching process to achieve parts that do not require subsequent processes, such as deburring, by controlling the properties of the starting materials and with the help of tools such as design of experiments and simulations. In the present study, tensile tests were performed on three steels with different compositions and three sample geometries. The information obtained from these tests has allowed us to determine the parameters of the Johnson–Cook damage criteria. Moreover, punching was performed on real parts and compared with simulations to analyze the percentage of burnish surface. The results obtained show that the methodology used was correct and that it can be extrapolated to other types of die-cutting processes by reducing the percentage of surface fractures and predicting the appearance of cracks. Furthermore, it was observed that clearance has a greater influence than processing speed, while the minimum percentage of the burnish area was observed for the minimum values of clearance.

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Section: Experimental Punching Testsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study and Optimization of the Punching Process of Steel Using the Johnson–Cook Damage Model

Claver,

Acosta,

Barba

et al. 2024

Metals

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“…Finite element simulation is common in the study of punching processes. Victor Hugo Cabrera et al [6] investigated the effect of punch shapes on maximum punching force by ANSYS simulations. Mori K et al [7] used LS-Dyna to study the mechanism of residual stress generation at the fracture edge during punching.…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Punching Parameters and Selection of Fracture Damage Model for Punching

Yang¹,

Huang²,

Han³

et al. 2023

Atlantis Highlights in Materials Science and Technology

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Due to the advantages of high efficiency, low energy consumption and wide applicability, die punching has been widely used in the shearing process of automotive parts. However, it is seldom used on ultra-high strength steel due to the high punching force and risk of tool wear. In this paper, study of die punching process for hot stamped steel Usibor 1500P has been carried out. Firstly, the influence of process parameters including punching velocity, die clearance, punch corner radius, sheet thickness, punch diameter and punch shape have been studied through a specifically designed punching tool. Corner radius at the punch edge can significantly improve the sheared edge quality, and tapered flat-bottomed punch and conical shaped punch evidently reduce and raise the maximum punching force respectively. Secondly, based on the damage thresholds obtained from "iterative prediction-correction" method, finite element fracture model for the die punching process of Usibor 1500P has been constructed and validated, the Oyane and MMC damage models are considered as the most suitable for describing the fracture characteristics of the Usibor 1500P during punching.

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Sheet Metal Shearing Process: An Overview

Kolhatkar,

Pandey

2023

Trans Indian Natl. Acad. Eng.

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Cutting parameters in dies for sheet metal through inclined, concave, and convex shapes in round punches

Cited by 3 publications

References 10 publications

Study and Optimization of the Punching Process of Steel Using the Johnson–Cook Damage Model

Study and Optimization of the Punching Process of Steel Using the Johnson–Cook Damage Model

Research on the Influence of Punching Parameters and Selection of Fracture Damage Model for Punching

Sheet Metal Shearing Process: An Overview

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