Ductile fracture prediction in cold forging process chains

Bariani, Paolo Francesco; Bruschi, Stefania; Ghiotti, Andrea; Simionato, M.

doi:10.1016/j.cirp.2011.03.135

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…The crack occurrence in multi-step cold-forged components, such as screw and shaft heads, can be satisfactorily predicted making use of both failure criteria and damage models. In [16], a linear damage accumulation law and the failure criterion based on the one by Bao and Wierzbicki, function of both the stress triaxiality and Lode parameter [216], are coupled providing a satisfactory agreement between the experimental and numerical fracture location as shown in Fig. 21.…”

Section: Bulk Metal Formingmentioning

confidence: 83%

Damage in metal forming

et al. 2020

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Section: Bulk Metal Formingmentioning

confidence: 83%

Damage in metal forming

et al. 2020

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“…In paper [33] was described the experience with cold forming of bolts, made of microalloyed steel, specially designed to enable elimination of thermal treatment. The paper [34] presents a new approach for the prediction of ductile fracture occurrence in multistage cold forging process chains. In turn in paper [35] experimental tests have been completed for high-strength 8.8 bolts for studying their mechanical performance subjected to tensile loading.…”

Section: Introductionmentioning

confidence: 99%

The Use of Simulation Methods in the Analysis of the Manufacturing Process of Hex Allen Bolts

Nowotyńska

Kut

Osetek³

2018

Teh. vjesn.

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Forming tools play a very important role in the production of shaped bolts with the use of plastic forming method. In industrial practice, the technological process of conventional shaping is the cold forming plastic, which causes a considerable wear of shaping tools. Properly designed, constructed and operated tool enables to provide high quality products at a sufficiently high volume of production, low cost, and the required level of security. Consequently, this will allow the company to compete effectively in today's market. The paper shows the numerical analysis of stress prevailing in the die during the implementation of forging of hex internal Allen bolts depending on the size of the applied interference. The research has allowed determining the impact of interference, among others, on the distribution of hoop stress in the die during the manufacturing process of the bolts.

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“…Thus, these simulations are an efficient tool helping design of the best forging technology [1,2]. Whole manufacturing chains can be now simulated [3,4]. Attempts to optimize manufacturing chains were made, as well [5], but efficiency of these solutions is still low.…”

Section: Introductionmentioning

confidence: 99%

Computer Aided Design of Manufacturing of Anchors and Formulation of the Optimization Task for in Use Properties

Skóra¹,

Węglarczyk

Kusiak

et al. 2013

KEM

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Computer aided design of the manufacturing technology for anchors is presented in the paper. Evaluation of applicability of various materials for anchors, as well as analysis of the influence of process parameters on the in use properties of product, were the objectives of the research. In the material part, bainitic steels were considered as an alternative for the commonly used C-Mn steels. Possibility of elimination of the heat treatment was evaluated. Rheological models for the investigated steels were developed and implemented into the finite element code for simulations of drawing and multi stage forging. Criteria for the selection of the best manufacturing chain composed dimensional accuracy, tool life and product properties. Industrial trials were performed for the selected cycle and the efficiency of this cycle was evaluated. Finally, simulations of the in use behaviour of the anchor-concrete joint were performed. On the basis of the simulations the optimization task using strength of the joint as the objective function was formulated

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Ductile fracture prediction in cold forging process chains

Cited by 12 publications

References 8 publications

Damage in metal forming

Damage in metal forming

The Use of Simulation Methods in the Analysis of the Manufacturing Process of Hex Allen Bolts

Computer Aided Design of Manufacturing of Anchors and Formulation of the Optimization Task for in Use Properties

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