Finite element simulation and experimental investigation of cold forward extrusion process

Luca, Dorin

doi:10.1051/matecconf/201817802010

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Due to the different forming process schemes and mold structures of different workpieces, relying solely on experience to analyze the reasons for defects in workpieces have certain limitations [3] . Finite element simulation can simulate the stress, strain, and temperature during the plastic deformation process of materials, as well as the stress and strain of punches and molds [4] . This article takes the cold heading forming process of a series of M6 outer hexagonal long bolts as the research object, with the goal of obtaining the maximum length-diameter ratio that the ejector rod can withstand.…”

Section: Introductionmentioning

confidence: 99%

Research on the destabilization of the ejector rod of cold header

Shu

Zhang

Duan

et al. 2023

Second International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2023)

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Taking the ejector rod of a series of long bolts on cold heading process as the research object, the force of ejector rod is simulated and analyzed by DEFORM-3D software in order to solve the problem of ejector rod fracture encountered with actual production. The buckling of ejector rod is analyzed by Workbench software, and the relationship between the stress of M6 outer hexagon longs bolt ejector rod with different length-diameter ratios of cold heading and the critical stress of destabilization is analyzed. The critical length-diameter ratio of the ejector rod to break with unprotected condition is obtained, which agrees with the production experience of an enterprise. The finite element analysis technology provides theoretical basis of the production of long bolts and provides standard for the design of cold heading ejection mechanism.

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Section: Introductionmentioning

confidence: 99%

Research on the destabilization of the ejector rod of cold header

Shu

Zhang

Duan

et al. 2023

Second International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2023)

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Experimental and finite element analysis study of die geometrical affect the forming load during extrusion process

Shukur

Jaber

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The effect of extrusion parameters on the extrusion of A1100 pure aluminum was investigated with the aid of numerical methods. With this regard, the process parameters, three die angles (15°,30°, 45°), and three forming velocities (1,2,3 mm/min) were studied. Besides, the experimental results were analyzed using the finite element analysis (FEA) using ANSYS 16. All the experimental and numerical results were compared to each other and it was concluded from the results that the effect of die geometry on the forming load is more dominant than forming velocity. In addition, it was observed that the increase in the extrusion speed causes a significant increase in the forming load for all die angles.

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Force and pressure function formulation for direct cold extrusion of aluminum alloy Al 1350 using regression method

Alfaqs¹,

Marahleh²

2021

Nauk. visn. nat. hirn. univ.

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Purpose. Establishing methodology in order to determine mathematically both extrusion force and pressure functions for Aluminum alloy AL 1350 using the regression method of experimental data. Methodology. Several variables (diameter of the cavity for pressing D, degree of extrusion, angle of the punch head cone 2, and ratio of the semi-finished sizes Rs) were included when using the regression method considered. Findings. Diameter and strain were found to play a significant role in predicting both extrusion force and pressure functions associated with the extrusion process. Mathematical formulas for force and pressure were obtained using the regression method. Amethodology has been developed for the mathematical determination of extrusion force and pressure. Originality. Force and pressure functions in direct cold extrusion process are mainly required for the design of extrusion dies. However, the existence of such data in the literature is insufficient to implement the process for direct cold extrusion of aluminum and aluminum alloys as well as for other materials. Results of the study consider the main factors influencing extrusion force and pressure as well as the main differences for types of aluminum alloys. Practical value. The mathematical formulas obtained by the regression method provide a mathematical tool for calculating force and pressure values in direct extrusion process.

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Finite element simulation and experimental investigation of cold forward extrusion process

Cited by 3 publications

References 14 publications

Research on the destabilization of the ejector rod of cold header

Research on the destabilization of the ejector rod of cold header

Experimental and finite element analysis study of die geometrical affect the forming load during extrusion process

Force and pressure function formulation for direct cold extrusion of aluminum alloy Al 1350 using regression method

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