Forging on the four-lever arms swaging machines

Hebdzyński, R.; Kajzer, Stefan; Kozik, R.

doi:10.1016/s0924-0136(96)02568-x

Cited by 11 publications

(7 citation statements)

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“…In order to estimate the total load except for FEM, the upper bound method can calculate the total force within RFP. Therefore, Groche and Hebdzyński [4]- [5] expressed the relationship between strain and hardening, one of the essential phenomena during cold processes that can directly affect the total load. Studies performed with a sensor element with two separate mandrels have shown that neglecting hardening zone materials with a high hardness coefficient leads to a deviation in the residual stress up to 30%.…”

Section: Introductionmentioning

confidence: 99%

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Darki¹,

Raskatov²

2023

JMechE

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Considering the complexity of the radial forging process, the study of dynamic and thermodynamic parameters is of great importance. With the severe deformation of a workpiece in a plastic state, the effects of all parameters affecting the final geometry of the forging pipe need to be optimized. Thus, the mathematical model of the process is based on visco-plastic material, taking into account thermomechanical coupling and the surface properties during forging, including the hardness of the workpiece and friction. The results present the effects of a die angle on residual stress, total wear, and contact force, leading to ideal operating conditions and the ideal design of machine parts. In order to ensure the accuracy of the calculations and predictions made through software, a hardness test was performed experimentally, which showed the hardness curve of the microstructure and the strain of the workpiece. This indicates the consistency and accuracy of the results obtained from both methods. In order to improve the process and the tube employed, using an optimized die is recommended.

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Section: Introductionmentioning

confidence: 99%

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Darki¹,

Raskatov²

2023

JMechE

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“…In the aspect of designing of radial forging machine and its components. Hebdzyński and Herrmann et al [7,8] designed a machine included 4 levers and one eccentric sleeve while a ball-andsocket joint supported the levers. Within the new design, they studied the effect of die angle and feed rate, claiming that the forging force decreased.…”

Section: Introductionmentioning

confidence: 99%

Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

Darki

Raskatov

2022

Preprint

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In this study, considering all the parameters in radial forging and a three-dimensional model has been simulated using the finite element method. By implementing an elastoplastic state for the specimen tube, parameters such as friction type, residual stress distribution, effective strain distribution, material flow velocity and its effect on the neutral plate and the distribution of force in the die have been studied and analyzed. The effects of angle on the quality and characteristics of the specimen and the longevity of the die have also been obtained. Experimental results have been used to confirm the accuracy of the simulation. The results of the hardness test after forging were compared with the simulation results. Good agreement between the results indicates the accuracy of the simulation in terms of hardness. Therefore, this validation allows confirming the other obtained results for the analysis and prediction of various components in the forging process. After the validation and confirmation of the results through the hardness test, the hardness distribution was obtained by considering temperature changes and the effective strain on the specimen.

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“…As far as mass production is concerned, metal forming offers the most advantages due to short manufacturing time, low material waste and high strength properties. Metal forming techniques for producing hollow parts include: • spinning [1,2], • standard forging [3,4], • rotary swaging [5,6], • extrusion [7], • rotary compression [8,9], • flanging [10,11], • sequential upsetting [12], • radial extrusion.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study of Producing Two-Step Flanges by Extrusion with a Movable Sleeve

Winiarski¹,

Gontarz²

2017

Archives of Metallurgy and Materials

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The paper presents a new metal forming process for producing two-step external flanges on hollow parts. With this method, the flange is extruded by a movable sleeve, which moves in the opposite direction to the punch. This reduces the phenomenon of buckling of the tube wall, which allows extruding flanges with relatively large volumes. The new method was applied to produce a two-step flange on the end of a tubular billet made of 6060 aluminum alloy. This cold metal forming process was designed based on numerical simulations and experimental tests. The effect of the basic technological parameters on metal flow was investigated and limitations of the process were identified. The experimental results confirmed the possibility of forming a two-step flange with a diameter that is approximately twice as big as the external diameter of the tubular billet.

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Forging on the four-lever arms swaging machines

Cited by 11 publications

References 0 publications

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

Numerical and Experimental Study of Producing Two-Step Flanges by Extrusion with a Movable Sleeve

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