Investigation of a new methodology for the prediction of drawing force in deep drawing process with respect to dimensionless analysis

Hajiahmadi, Saeed; Elyasi, Majid; Shakeri, Mohsen

doi:10.1186/s40712-019-0110-9

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…The model confirmed that the dimensionless parameters e.g. ratio of sheet thickness to blank diameter (t/D; most dominant dimensionless parameter), punch diameter to blank diameter (d/D), the radius of die punch to blank diameter (R/D), and coefficient of friction (µ) are majorly influences for drawing force [16].…”

Section: Introductionmentioning

confidence: 54%

Developing the Functional Relation of Input parameters in single-point incremental forming through Dimensional Analysis

Oraon¹,

Sharma²

2022

Preprint

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The system is designed with the basics of fundamental units termed dimensional analysis (DA). The fundamental units are modeled to figure out some quantitative measures without the knowledge of the system behavior. Subsequently, the dimension analysis-based modeling helps to develop the functional relation of input parameters for the set objectives. The generalized model is validated with the output of experiments with an agreement to adopt the model within a certain range of error. Single Point Incremental Forming (SPIF) is an innovative sheet metal forming technique in which the forming of metal sheets to the desired shape without using dedicated dies. The SPIF investigations and declared results are desperately waiting for its industrial acceptability but yet the optimization of the process is absent. The current study is to develop the functional relation of input parameters of SPIF through dimensional analysis. Multiple input parameters such as step-down size, diameter and area of forming tool, feed rate of the tool, the ultimate tensile strength of the blank (metal sheet) and density of blank, lubricants, rotational and transverse speed of forming tool are taken for experiments as well as model development. The model confirmed the functional relation of step-down size and area of tool end for surface roughness. Similarly, UTS of the blank (σ), thickness of the metal sheet (t), and tool end diameter (d) is observed as the prominent parameters for vertical force (Fz) whereas the step-down size (Δz) are dominate inversely the Fz-value. The acceptable limit of mean error for Ra and Fz is noted as 6.136nm and 2.044N respectively. The modified i.e. best fitted Ra and Fz are lower than the experimental and ANN values.

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Section: Introductionmentioning

confidence: 54%

Developing the Functional Relation of Input parameters in single-point incremental forming through Dimensional Analysis

Oraon¹,

Sharma²

2022

Preprint

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“…Compared to deep mechanical drawing, a signi cant improvement in formability was observed during the deep hydro-mechanical drawing process. The limit drawing ratio (LDR), which is one of the criteria and indicators of formability [1][2][3][4][5][6], increases signi cantly during the hydroforming of the sheet. An increase of formability is mainly due to the reduction of friction and the development of a more uniform strain distribution during the sheet hydroforming process.…”

Section: Introductionmentioning

confidence: 99%

Microstructural analysis of sheet hydroforming process assisted by radial ultrasonic punch vibration in a hydro-mechanical deep drawing die

Ghasemi

Elyasi

Baseri

et al. 2023

Int J Adv Manuf Technol

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Today, the use of sheet hydroforming methods in the conventional deep drawing process has signi cantly improved the formability of the sheet. However, due to the limitations of the sheet hydroforming process, new methods can be used in combination with it, such as ultrasonic-vibrationassisted forming. Many of the mechanical effects of ultrasonic vibration in the metal forming process are due to the metallurgical and structural impacts of the material, so to nd the cause of the observed events, one must look at the microstructural interactions of materials. Therefore, the process of St14 sheet hydroforming with the assistance of ultrasonic vibration is investigated microstructurally in this paper. For this purpose, during the hydroforming drawing process, ultrasonic vibration was radially applied to the punch in a hydro-mechanical deep drawing die. Then the process parameters, including thickness, equivalent strain, grain size, and rotation at a selected point of the cross-section of the sample parts are compared in four modes of conventional deep drawing (CDD), hydroforming deep drawing (HDD), deep drawing assisted by ultrasonic vibration (UDD), and hydroforming deep drawing assisted by ultrasonic vibration (UHDD). Results showed that the application of ultrasonic vibrations in the sheet hydroforming process led to a signi cant reduction in thickness strain (as well as equivalent strain), increased grain length, and reduced rotation. This implies the positive impact of ultrasonic vibrations in the ow of materials is due to the reduction of friction and facilitates the movement of dislocations.

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Microstructural Analysis of Sheet Hydroforming Process Assisted by Ultrasonic Vibration on Punch Radial in a Hydro-Mechanical Deep Drawing Die

Ghasemi¹,

Elyasi

Baseri³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Today, the use of sheet hydroforming methods in the conventional deep drawing process has significantly improved the formability of the sheet. However, due to the limitations of the sheet hydroforming process, new methods can be used in combination with it, such as ultrasonic-vibration-assisted forming. Many of the mechanical effects of ultrasonic vibration in the metal forming process are due to the metallurgical and structural impacts of the material, so to find the cause of the observed events, one must look at the microstructural interactions of materials. Therefore, the process of St14 sheet hydroforming with the assistance of ultrasonic vibration is investigated microstructurally in this paper. For this purpose, during the hydroforming drawing process, ultrasonic vibration was radially applied to the punch in a hydro-mechanical deep drawing die. Then the process parameters, including thickness, equivalent strain, grain size, and rotation at a selected point of the cross-section of the sample parts are compared in four modes of conventional deep drawing (CDD), hydroforming deep drawing (HDD), deep drawing assisted by ultrasonic vibration (UDD), and hydroforming deep drawing assisted by ultrasonic vibration (UHDD). Results showed that the application of ultrasonic vibrations in the sheet hydroforming process led to a significant reduction in thickness strain (as well as equivalent strain), increased grain length, and reduced rotation. This implies the positive impact of ultrasonic vibrations in the flow of materials is due to the reduction of friction and facilitates the movement of dislocations.

show abstract

Investigation of a new methodology for the prediction of drawing force in deep drawing process with respect to dimensionless analysis

Cited by 4 publications

References 12 publications

Developing the Functional Relation of Input parameters in single-point incremental forming through Dimensional Analysis

Developing the Functional Relation of Input parameters in single-point incremental forming through Dimensional Analysis

Microstructural analysis of sheet hydroforming process assisted by radial ultrasonic punch vibration in a hydro-mechanical deep drawing die

Microstructural Analysis of Sheet Hydroforming Process Assisted by Ultrasonic Vibration on Punch Radial in a Hydro-Mechanical Deep Drawing Die

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