Theoretical and Experimental Study of the Tandem Skew Rolling Process

Mao, Fei Long; Shuang, Yuan Hua; Wang, Qinghua; Wang, Fu Jie; Gou, Yu Jun; Zhao, Chun Jiang

doi:10.1002/srin.201800022

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…This point can express the condition of the mandrel is more critical than other components of the piercing system. Mao et al 7,8 developed the rolling process through numerical theoretical and experimental methods. The upper bound solution has been implemented as the theoretical section to calculate the load force was calculated.…”

Section: Introductionmentioning

confidence: 99%

Study of the rollers geometry effects in rotary tube piercing and wear analyses of mandrel according to the finite element method

Darki

Raskatov

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The rotary tube piercing (RTP) is the first process of making the seamless tube after producing the desired alloy ingot. There are several approaches to manufacture a seamless tube, but one of the most common types is RTP. This approach covers a wide range of processes that are categorized according to the number and shape of the rollers. On the other hand, each of these types has designed guides in the output and input of the piercing process. In this paper, a new design of the input guide for four types of rollers have been examined and simulated. Thus, four specimens including Diescher and Conical rollers were considered, with the different number of rollers. Results including torque, total force, mandrel wear, temperature distribution, and strain were extracted using FEM simulation. In order to the validation of simulation, the total force and oscillations of applied force within the process have been compared with the experimental results. The results obtained through this simulation, are more in line with the empirical results obtained from previous research. As well as, the FEM simulation confirmed the performance accuracy of the output and input guides of the RTP process. On the other hand, the results indicate that the three-roller Diescher type with 17° feed angle, has the most suitable arrangement for production of seamless tube.

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Section: Introductionmentioning

confidence: 99%

Study of the rollers geometry effects in rotary tube piercing and wear analyses of mandrel according to the finite element method

Darki

Raskatov

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…1,2 Compared with the traditional manufacturing method, the SR technique has some advantages, such as high production efficiency, saving materials and energy, lower costs, etc. 3 The formation of BSBs using the SR technique is increasingly becoming the preferred manufacturing method for researchers.…”

Section: Introductionmentioning

confidence: 99%

Predicting the microstructure evolution for the warm skew rolling of bearing steel balls under different process parameters

Huo¹,

He²,

Yao³

et al. 2020

Mater. Tehnol.

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The high performance of bearing steel balls (BSBs) depends on the microstructure. Carbide spheroidization is the main mechanism in warm deformation, which leads to the metal flow dynamic softening of bearing steel. Process parameters of warm skew rolling (SR) such as roller angle, rolling temperature and roller rotating speed have a significant influence on the carbide spheroidization of bearing steel. A simulation system of microstructure was developed based on unified visco-plastic constitutive equations to predict the microstructure evolution of BSB during warm SR. Next, a series of FE simulations were conducted to investigate the effect of process parameters of warm SR on the microstructure of BSB. The predicted results show that the degree of carbide spheroidization decreases with the increase of roller angle, rolling temperature and roller rotating speed. The optimal process parameters of warm SR were selected as a roller angle of 2.0°, rolling temperature of 650°C and roller rotating speed of 70 min-1. More carbides participation and sufficient carbide spheroidization were achieved under the optimal process parameters of warm SR. The application of optimal process parameters into the formation of BSB with 30 mm diameter can reduce the special carbide spheroidization annealing time and energy consumption, and improve productivity.

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“…The mechanical structures of the mill and a method of adjusting process parameters were introduced and described [3,4]. A theoretic model of the TSR process was then established and derived in terms of dual stream functions, which could obtain the kinematically admissible velocity field of the billet during the rolling process [5]. Based on the times spent on the deformation process of the two sections, the velocity coordination of the rollers in both sections was researched, and a proper velocity match was obtained [6].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Experiments on a Light Alloy Seamless Tube via a Tandem Skew Rolling Process

Mao¹,

Wang

Shuang

et al. 2019

Metals

Self Cite

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As a process for producing seamless tubes, the tandem skew rolling (TSR) process was proposed. In order to study deformation characteristics and mechanism on tubes obtained by the TSR process, a numerical simulation of the process was analyzed using Deform-3D software. Simulation results demonstrated the distribution of stress, strain, velocity, and temperature of a seamless tube in the stable stage during the TSR process. Actual experiments of carbon steel 1045, high strength steel 42CrMo, and magnesium alloy AZ31 were carried out in a TSR testing mill. The results demonstrated that the TSR process is qualified for producing tubes of high quality, with an accuracy of ±0.2 mm in wall thickness and ±0.35 mm in diameter. This process is suitable for manufacturing seamless tubes that are difficult to deform or that have been deformed in a narrow range of temperature.

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Theoretical and Experimental Study of the Tandem Skew Rolling Process

Cited by 4 publications

References 11 publications

Study of the rollers geometry effects in rotary tube piercing and wear analyses of mandrel according to the finite element method

Study of the rollers geometry effects in rotary tube piercing and wear analyses of mandrel according to the finite element method

Predicting the microstructure evolution for the warm skew rolling of bearing steel balls under different process parameters

Deformation Behavior and Experiments on a Light Alloy Seamless Tube via a Tandem Skew Rolling Process

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