Effect of extrusion stem speed on extrusion process for a hollow aluminum profile

Zhang, Cunsheng; Zhao, Guoqun; Chen, Zhiren; Chen, Hao; Kou, Fujun

doi:10.1016/j.mseb.2011.09.041

Cited by 56 publications

(16 citation statements)

References 16 publications

(13 reference statements)

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“…According to the effects of different extrusion parameters on seam welds, investigators Bingöl et al [11], Bingöl and Keskin [17] and Zhang et al [18] concluded the billet temperature and ram speed were the most influential parameters. The billets in high temperature or extruded with fast speed will reduce the welding time and also will result in less hydrostatic pressure in welding chamber.…”

Section: Discussionmentioning

confidence: 99%

Microstructural Characterization of Extrusion Welds in 6xxx Aluminum alloys

Ren¹,

Zhang

et al. 2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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In this study, the microstructure of extrusion welds (including charge welds and seam welds) in a curtain wall hollow profile made of 6063 alloy is investigated using both Optical and Scanning Electron Microscopy (OM & SEM, respectively). The grain size and the morphology, size and distribution of particles were different in seam weld, charge weld and matrix, due to variations in thermal deformation and recrystallization. Meanwhile, the relation of microstructural to the anodized streaks is also discussed. Considering both the practical extrusion process and reported literatures, the most important factors among the numerous extrusion parameters are analyzed.

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Section: Discussionmentioning

confidence: 99%

Microstructural Characterization of Extrusion Welds in 6xxx Aluminum alloys

Ren¹,

Zhang

et al. 2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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“…The goal of the extrusion die design is to ensure the velocity in the extruded product is evenly distributed, and it is a decisive factor in the quality of the extruded product [31,32]. The velocity relative difference (VRD) shown in Equation (4) is used to assess the overall level of the velocity distribution of the extruded product [10,31,33].…”

Section: Extrusion Velocity Of the Productmentioning

confidence: 99%

“…parameters of extrusion process can be obtained such as extrusion velocity, product temperature, die deformation, die stress, welding seam etc. [10][11][12]. studied.…”

mentioning

confidence: 99%

Effects of Solid Die Types in Complex and Large-Scale Aluminum Profile Extrusion

Truong

Hsu²,

Tong

2019

Applied Sciences

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Increasing customer requirements for quality and productivity in extruding aluminum products has led to the development of different types of extrusion dies. In this study, three different types of dies, including traditional flat die, pocket die and spread die were designed to extrude complex and large-scale solid profiles. The design parameters for these dies were used from actual extrusion experience. The results obtained from steady-state simulation such as velocity, temperature, extrusion force, and die deformation were used to assess the advantages and disadvantages of the dies. Transient simulations were performed to analyze the evolution of transverse weld in the pocket and spread dies. The effects of ram speeds on the related extrusion parameters were also investigated. The research results provide useful guides for designers and engineers in selecting these types of extrusion dies. parameters of extrusion process can be obtained such as extrusion velocity, product temperature, die deformation, die stress, welding seam etc. [10][11][12]. studied. To balance the metal flow in the extrusion product, the dies were designed with a 3D model using practical experience parameters. After that, numerical simulations of extrusion were conducted by HyperXtrude 2017 software (Altair Engineering, Inc., Michigan, USA) with the Arbitrary Lagrangian-Eulerian (ALE) algorithm. The steady-state extrusion parameters, such as extrusion force, velocity, temperature, and die deformation, were investigated. The transient simulation is utilized to explore the evolution of transverse weld in the billet-to-billet extrusion process of the pocket, and the spread dies. Finally, the effects of ram speeds on the related extrusion parameters were examined. The advantages and drawbacks of these die types are analyzed and evaluated based on the obtained parameters from simulations.

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“…This value was recorded by a feeler gauge after the die was dismounted from the press. In order to predict the pressure map on the die faces, a steady-state process simulation was performed by means of the FE code Altair HyperXtrude5 (HX) [27] and by imposing boundary conditions, in terms of friction and heat exchange coefficients, previously verified [28][29][30]. With the aim of verifying the robustness of code computations, experimental and numerical results were compared in terms of extrusion load, profiles exit velocity, and die and profile temperatures.…”

Section: 2mentioning

confidence: 99%

A Numerical Modelling Approach for Time-Dependent Deformation of Hot Forming Tools under the Creep-Fatigue Regime

Reggiani

Donati

Tomesani

2016

Advances in Materials Science and Engineering

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The present study was aimed at predicting the time-dependent deformation of tools used in hot forming applications subjected to the creep-fatigue regime. An excessive accumulated plastic deformation is configured as one of the three main causes of premature failure of tools in these critical applications and it is accumulated cycle by cycle without evident marks leading to noncompliant products. With the aim of predicting this accumulated deformation, a novel procedure was developed, presented, and applied to the extrusion process as an example. A time-hardening primary creep law was used and novel regression equations for the law's coefficients were developed to account not only for the induced stress-temperature state but also for the dwell-time value, which is determined by the selected set of process parameters and die design. The procedure was validated against experimental data both on a small-scale extrusion die at different stress, temperature, load states, and for different geometries and on an industrial extrusion die which was discarded due to the excessive plastic deformation after 64 cycles. A numerical-experimental good agreement was achieved.

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Effect of extrusion stem speed on extrusion process for a hollow aluminum profile

Cited by 56 publications

References 16 publications

Microstructural Characterization of Extrusion Welds in 6xxx Aluminum alloys

Microstructural Characterization of Extrusion Welds in 6xxx Aluminum alloys

Effects of Solid Die Types in Complex and Large-Scale Aluminum Profile Extrusion

A Numerical Modelling Approach for Time-Dependent Deformation of Hot Forming Tools under the Creep-Fatigue Regime

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