Research on Multipass Hot Spinning Process Technology of AZ80 Magnesium Alloy Shell

Liang, Wei; Guan, Lin; Lv, Qin; Zhi-gang, Xing

doi:10.1155/2019/8930134

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…The present study found that the auxiliary energy field on the plastic forming process can promote the flow of the material in the deformation zone and improve the forming accuracy of the ribs. The auxiliary energy fields can be divided into electricity [2], sound, heat [3] and light [4]. Among them, ultrasonic has the advantages of concentrated energy and strong propagation direction.…”

Section: Introductionmentioning

confidence: 99%

Study on the ultrasonic-assisted spinning of thin-walled cylindrical parts with longitudinal and transverse ribs

Zhao

et al. 2023

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

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Current studies have shown that the application of composite energy fields in the plastic forming process can help reduce the forming load and promote material flow. In this paper, a new method of ultrasonic-assisted spinning integral forming for thin-walled cylindrical parts with outer ribs was proposed, which could not only improve the manufacturing efficiency of ribbed cylindrical parts, but also further improve the forming height of outer ribs. A simulation model of ultrasonic-assisted spinning for thin-walled cylindrical parts with longitudinal and transverse outer ribs was established, the influence of ultrasonic amplitude on the forming accuracy of longitudinal and transverse outer ribs was obtained, and the mechanism of ultrasonic vibration improving the forming accuracy of ribs was revealed. On this basis, ultrasonic-assisted spinning equipment was built to verify the feasibility of this process. The results showed that with the increase of ultrasonic amplitude, the forming height of longitudinal and transverse outer ribs gradually increases, and the effect of raising the forming height of transverse ribs is higher than that of longitudinal ribs. In addition, as the ultrasonic amplitude increases, the uniformity of the forming morphology of the outer rib is not obviously improved. The spinning of the outer rib is mainly realized by the material in the form of integral filling into the groove. The ultrasonic vibration improves the material flow properties, and promotes the filling of the material into the rib groove, thereby increasing the spinning forming height of the outer ribs. The forming height of the outer rib was measured with or without ultrasonic vibration. When the rolling reduction is 1 mm, the average forming height of the outer ribs is increased by 50% compared with that without ultrasound, which provides a new research idea for the integral forming of the spinning of thin-walled cylindrical parts with longitudinal and transverse ribs.

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Section: Introductionmentioning

confidence: 99%

Study on the ultrasonic-assisted spinning of thin-walled cylindrical parts with longitudinal and transverse ribs

Zhao

et al. 2023

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

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show abstract

“…In recent years, in order to improve the flow characteristics of materials in the spinning process, many scholars have tried to introduce various energy forms such as heat [2], electricity [3], laser [4] into the spinning process. Studies have shown that the application of ultrasonic vibration in cutting, upsetting, spinning and other processes can significantly reduce the forming load and the friction coefficient between the workpiece and the tool, and improve the surface quality of the workpiece [5][6][7] due to the acoustic softening effect [8][9][10][11] and surface effect [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic attenuation characteristics on forming accuracy of ribbed cylindrical parts in ultrasonic-assisted spinning process

Li,

Zhu,

Zhao

et al. 2023

Preprint

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Ultrasonic-assisted forming process is one of the important methods to improve the formability of materials because of its acoustic softening effect and antifriction effect. After the introduction of ultrasonic, the forming accuracy of the inner ribs is improved in the spinning process of ribbed cylindrical parts, but the effect law of ultrasonic energy on the forming of inner ribs have not been clarified in detail. In this paper, a modeling method of ultrasonic-assisted spinning was proposed, which was taken into account the attenuation characteristics of ultrasonic energy in solid media for the improvement of the simulation accuracy. The corresponding simulation model was established to explore the effect law of ultrasonic amplitude on the forming accuracy of inner ribs. The results showed that the forming height and surface morphology of longitudinal ribs can be improved effectively in the ultrasonic-assisted spinning process. With the increase of ultrasonic amplitude, the forming height of longitudinal rib gradually increased, but the increase degree gradually slowed down, and the surface morphology of the longitudinal ribs always present the geometric characteristics that the screw-in end is higher than the screw-out end. The reason is that the application of ultrasonic vibration promoted the radial and circumferential flow of the material, and improved the material filling ability into the rib groove. The combined effect of ultrasonic softening effect and anti-friction effect reduced the radial filling difference between the screw-in end and the screw-out end of the ribs. Ultrasound could enhance the material flow but did not significant change the forming distribution characteristics of the ribs, resulting in limited rib height and uneven surface morphology. Also, the energy field gradient design method along the sheet thickness was proposed to further improve the forming accuracy of the inner ribs.

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“…Numerous researchers have studied how to improve the spinning quality of these shells. For instance, Liang W et al used ABAQUS software to simulate the stress-strain distribution in the spinning process, optimized the spinning process parameters through experiments, and realized the highquality spinning manufacturing of magnesium alloy cylinder parts [11]. Gao X C used DYNAFORM dynamic display analysis technology to simulate spinning deformation and obtained the variation laws of strain and wall thickness during spinning [12].…”

Section: Introductionmentioning

confidence: 99%

Spinning process optimization and microstructure of stainless-steel welded pipe

Fengde¹,

Zhang²,

Fang³

et al. 2022

Mater. Res. Express

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Defects, such as cracks, typically occur in the spinning process of ternary catalyst shells. This study investigates the optimization of spinning process parameters to prevent such defects. An orthogonal simulation is performed using a finite element model of the spinning process of a ternary catalyst shell. The simulation results are verified by performing spinning tests using a 439 stainless steel welded pipe. The microstructure, hardness, and quality of formed parts are analyzed. The simulation and test results demonstrate that when the spinning temperature is 1000 °C, the roller fillet radius, roller speed, and feed ratio are 5 mm, 40 r/s, and 1.2 mm/r, respectively. In addition, the error rates of the forming thickness, port diameter, and roundness error are 1.37%, 1.25%, and 4.8%, respectively. This verifies the accuracy of the simulation. No defects are generated during spinning, and the spinning quality is high. The feed ratio is the main factor that affects the roundness error, followed by the roller speed. As deformation increases, hardness increases and the crystal size decreases. The results of this study can provide important theoretical guidance for practical spinning applications.

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Research on Multipass Hot Spinning Process Technology of AZ80 Magnesium Alloy Shell

Cited by 5 publications

References 5 publications

Study on the ultrasonic-assisted spinning of thin-walled cylindrical parts with longitudinal and transverse ribs

Study on the ultrasonic-assisted spinning of thin-walled cylindrical parts with longitudinal and transverse ribs

Effect of ultrasonic attenuation characteristics on forming accuracy of ribbed cylindrical parts in ultrasonic-assisted spinning process

Spinning process optimization and microstructure of stainless-steel welded pipe

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