Optimization of open die forging of round shapes using FEM analysis

Choi, Sung-Woo; Chun, Myung-Sik; Tyne, C. J. Van; Moon, Young Hoon

doi:10.1016/j.jmatprotec.2005.09.010

Cited by 71 publications

(37 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Liu 등은 점진성형 기 술 중 하나인 로터리단조에서 소재에 나타나는 버섯 모양의 불균일 변형의 발생 원인을 연구하 여 규명하였다 [3]. Choi 등은 회전단조를 통해서 사 각 바에서 둥근 바를 생산하는 경우에 대하여 연 구하였으며, 결과로써 적절한 압하량, 회전각 그리 고 피치량 등을 구하였다 [4]. Ghaei와 Movahhedy는 …”

Section: 서 론unclassified

Deformation Characteristics in Incremental Forging of a Slab

2009

Transactions of Materials Processing

View full text Add to dashboard Cite

Large load is required in forging of large-scale components which becomes a critical restriction in practice. In the present study, two methods of incremental forging were investigated for the purpose of reducing the load required for forging of large and thick plates. The forging was applied primarily to obtain fine grains by imposing large amount of plastic deformation to the plates. One was to use nine strokes with a flat die and the other was to use three strokes with a curved die. The die moves vertically in the former while it moves vertically as well as rolls horizontally in the latter. Deformation of the slab in each case was analyzed by rigid-plastic finite element method and as a result, variations of load and slab holding force, and distributions of effective strain and thickness were predicted.

show abstract

Section: 서 론unclassified

Deformation Characteristics in Incremental Forging of a Slab

2009

Transactions of Materials Processing

View full text Add to dashboard Cite

show abstract

“…The great non-uniformity of deformations in the forging process makes the production of internal-quality titanium forgings much more difficult than imparting the proper shape and geometry to the forgings [3]. In order to maintain a relatively small gradient of properties within the entire forging volume and, at the same time, their required level, cogging process is used in anvils of a purpose-designed shape [4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of deformation and microstructure evolution during the hot deformation of titanium alloy

Kukuryk

Winczek

2018

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. The paper presents theoretical and experimental analysis of deformations and microstructural evolutions in the hot cogging process of Ti-6Al-4V alloy. A three-dimensional thermal -plastic coupled finite element model is employed to study the mechanical and thermal interaction between the forging anvils and the workpiece. To explore the distributions of effective strain, effective stress, mean stress and temperature of the specimens have been systematically studied. Attention has been paid to deformation, temperature, stress and strain inside the specimens and these parameters have been used to determine the evolution of the microstructure in deformed samples during hot cogging process. A comparison of theoretical with experimental results shows that the developed model may be used to accurately predict deformations and microstructural parameters.

show abstract

“…Como a peça a ser forjada costuma ser maior do que as ferramentas, a deformação costuma ser restrita a uma pequena região da peça e, com isso, as cargas de forjamento necessárias são menores do que aquelas necessárias para deformar a peça inteira. Portanto, uma máquina de menor capacidade pode ser usada para produzir uma determinada peça, empregando forças de forjamento reduzidas progressivamente [4].…”

Section: Introductionunclassified

Comportamento De Eixo Vazado Durante O Forjamento Em Matriz Aberta Através Da Simulação Numérica E Através De Experimento Físico

Corrêa¹,

Schaeffer²

2017

Tecnologia Em Metalurgia Materiais E Mineração

View full text Add to dashboard Cite

ResumoForjamento em matriz aberta é um processo de forjamento largamente empregado para produção de eixos de grande porte como, por exemplo, eixo de transmissão para os aero geradores. Visando a redução de peso, busca-se produzir um eixo vazado que atenda as mesmas condições de trabalho de um eixo maciço. Durante o forjamento de eixos de grande porte, o eixo sofre compressões sucessivas gerando um campo de tensões que, através da simulação numérica, evidenciam-se as diferenças na distribuição de tensões ao longo da seção. Analisou-se o forjamento em matriz aberta de um tarugo cilíndrico vazado com o intuito de produzir um eixo vazado através de simulações computacionais pelo Método dos Elementos Finitos e, com base de experimentos físicos, constataram-se a validade da simulação numérica. Realizaram-se simulações baseado no FEM, utilizando o software Simufact.Forming 12.0, obtendo-se valores de distribuição de tensões e deformações. Observou-se que as regiões que apresentaram maiores concentrações de deformações equivalentes coincidiram com as regiões que apresentaram maiores concentrações de tensões na direção z encontradas nos resultados da simulação numérica, seguindo a tendência esperada. Através de experimentos físicos foi constatado que os valores das forças para cada recalque apresentado pelo software de simulação numérica ficaram bem próximos da realidade, validando a empregabilidade do uso da simulação numérica. Palavras-chave: Forjamento em matriz aberta; Método dos elementos finitos; Experimento físico. HOLLOW SHAFT BEHAVIOR DURING THE FORGING IN OPEN DIE THROUGH NUMERICAL SIMULATION AND THROUGH PHYSICAL EXPERIMENT AbstractOpen die forging is a forging process widely used for the production of large size axes as, for example, drive shaft for wind turbine. In order to reduce weight, it seeks to produce a hollow shaft that meets the same working conditions of a solid shaft. During the forging of large size shaft, the part undergoes successive compressions generating a field stress that show the differences in stress distribution throughout section through numerical simulation. It analyzed the open die forging of a hollow cylindrical billet in order to produce a hollow shaft through computer simulation by the finite element method and by physical experiments verified the validity of the numerical simulation. Simulations were performed based on FEM, using the software Simufact.Forming 12.0, getting the stress and strain distribution values. It observed that the regions that showed greater concentrations equivalent strain coincided with the regions that showed greater stress concentrations in the z direction found in the numerical simulation results following the expected trend. Through physical experiments it was verified that the values of forces for each upset presented by numerical simulation software were very close to reality, validating the employability of the use of numerical simulation.

show abstract

Optimization of open die forging of round shapes using FEM analysis

Cited by 71 publications

References 10 publications

Deformation Characteristics in Incremental Forging of a Slab

Deformation Characteristics in Incremental Forging of a Slab

Analysis of deformation and microstructure evolution during the hot deformation of titanium alloy

Comportamento De Eixo Vazado Durante O Forjamento Em Matriz Aberta Através Da Simulação Numérica E Através De Experimento Físico

Contact Info

Product

Resources

About