Influences of contact pressure, sliding velocity, lubricant, bending angle and surface texture on friction behaviours in stainless steel strip drawing

Koowattanasuchat, Pramote; Mahayotsanun, Numpon; Mahabunphachai, Sasawat; Dohda, Kuniaki

doi:10.1080/2374068x.2015.1133744

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…The strip-drawing experiment was conducted to determine the coefficient of friction between the tool-sheet interface under the considered lubricant. [28][29] The strip-drawing results showed that the COF was 0.125 for the entire tool-sheet interfaces. In this study, the deep drawing setup was located in the stamping press.…”

Section: Deep-drawing Experimentsmentioning

confidence: 99%

Sheet thinning prediction method based on localized friction effect in deep-drawing

Preedawiphat

Koowattanasuchat

Mahayotsanun

et al. 2014

Advances in Mechanical Engineering

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The paper investigated the effect of localized friction on sheet thinning under lubricated conditions in the deep-drawing process. The Finite Element Analysis (FEA) was used to evaluate the sheet thinning of the AISI 304 sheet under six segmented blank-sheet interfaces. Different values of variable coefficient of friction (VCOF) in each segmented area were investigated, and the sheet thickness values at the considered areas were measured. The regression analysis models (Linear Regression, Response Surface Method, and Polynomial Regression) was used to determine the relationships between VCOF and sheet thinning. The results showed that the Linear Regression showed the best fit. The significant factor analysis was also carried out to determine how the localized friction affected the sheet thinning. The contributions of VCOF from at least two segmented areas affected the sheet thinning at any particular location. The obtained relationships of the VCOF and sheet thinning could be beneficial for the localized friction control for highly complex shapes.

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Section: Deep-drawing Experimentsmentioning

confidence: 99%

Sheet thinning prediction method based on localized friction effect in deep-drawing

Preedawiphat

Koowattanasuchat

Mahayotsanun

et al. 2014

Advances in Mechanical Engineering

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Tearing defect maps for the deep drawing of AISI 304 rectangular cups

2020

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This study proposes a method for integrating finite element analysis and response surface methodology to predict tearing locations in the deep drawing of a rectangular-shape AISI 304 cup. The finite element model was confirmed by a deep-drawing experiment with nitrogengas springs, and the finite element analysis results were in agreement. Moreover, the regression model was developed using response surface methodology to predict final thickness at various locations on the rectangular-shape deep-drawn cup based on 40 finite element cases containing varied blank holder forces. The maximum percentage of thinning values was obtained from the response surface methodology results. The relationships among the blank holder forces and the thinning values at different locations were then further developed. The maps of the predicted tearing locations were then obtained and directly corresponded to the number of locations the specific blank holder forces. These maps, as established, could be directly used in a closed-loop control system enabling tearing defects to be prevented or eliminated.

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Avaliação experimental de elementos do sistema tribológico que favorecem o surgimento da adesão na ferramenta em processos de estampagem

Härter,

Sausen,

Campos

et al. 2024

Cuad. Ed. Desar.

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A durabilidade dos aços empregados em ferramentas de conformação é um aspecto crucial para a preservação da qualidade das peças e para a redução dos custos associados à manutenção. Ela depende da seleção adequada do material para as punções/matrizes, assim como do acabamento superficial, do seu tratamento térmico e revestimento. O objetivo deste estudo é investigar um dos fatores que contribuem para a rápida deterioração dos aços, que é o desgaste adesivo. Para tal, foram conduzidos ensaios de atrito com elevadas pressões para acelerar a formação de aderência nos aços. A máquina utilizada para estas investigações é um equipamento para ensaios de atrito desenvolvido pela Bruning Tecnometal. Os corpos de prova da ferramenta foram fabricados com aços ferramenta de uso comum disponíveis no mercado.

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Influences of contact pressure, sliding velocity, lubricant, bending angle and surface texture on friction behaviours in stainless steel strip drawing

Cited by 3 publications

References 21 publications

Sheet thinning prediction method based on localized friction effect in deep-drawing

Sheet thinning prediction method based on localized friction effect in deep-drawing

Tearing defect maps for the deep drawing of AISI 304 rectangular cups

Avaliação experimental de elementos do sistema tribológico que favorecem o surgimento da adesão na ferramenta em processos de estampagem

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