Application and analysis of spread die and flat container in the extrusion of a large-size, hollow, and flat-wide aluminum alloy profile

Wang, Dong; Wang, Cuixue; Zhao, Guoqun; Chen, Liang; Sun, Wenchao

doi:10.1007/s00170-017-1127-y

Cited by 20 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, extrusion using a flat container/billet has been developed for the applications with reduced extrusion ratio and forces. But it has the problem of stress concentration for the container, which resulted in high wear and low life [21].…”

Section: Extrusionmentioning

confidence: 99%

Advances on manufacture methods for wide lightweight aluminium stiffened panels

Zhang

Zhou

Shi

et al. 2022

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

View full text Add to dashboard Cite

Wide aluminium panels with stiffeners are extensively applied in aviation, bridge and marine structures due to their high stiffness and light-weighting. Many efforts and contributions have been made to overcome the manufacturing difficulties of wide aluminium stiffened panels over years. The aim of this study is to analyse and compare current methods for producing wide stiffened panels for different applications. The manufacturing techniques for stiffened panels such as riveting, welding, machining, additive manufacturing, extrusion, are discussed. Thereinto, extrusion is a very promising technology in the production of wide aluminium stiffened panels as it can efficiently obtain extruded products with high material utilisation, good mechanical properties and structure integrity. Therefore, the methods of widening the stiffened panels in extrusion technology such as spread extrusion and postproduction flattening after extrusion are analysed emphatically. The present study is an attempt to analyse these efforts in order to guide future work in the area of producing much wider aluminium stiffened panels.

show abstract

Section: Extrusionmentioning

confidence: 99%

Advances on manufacture methods for wide lightweight aluminium stiffened panels

Zhang

Zhou

Shi

et al. 2022

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

View full text Add to dashboard Cite

show abstract

“…The value of VRD for balancing metal flow is defined by the designer, which is expected when the die design is as small as possible. In this study, if VRD is less than 2% of the metal flow is considered to be balanced [11,27]. Figure 8 shows the flow distribution in the extrudate of the conventional flat die obtained from simulation with bearing length calculated by Equation (1) with K w = 2.5.…”

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

View full text Add to dashboard Cite

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.

show abstract

“…With increase in billet preheat temperatures extrusion loads were lower but may induce poor surface quality of profile. Wang et al [36] have optimized the die by use of spreader in between upper die and lower die. Also, in the work reported by Liu [37], spread die was optimized for extruding a simple flat profile with high width to thickness ratio.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigations on AA6063 extrudates: effect of number of portholes on extrusion load and weld strength

Ammu,

Padole,

Agnihotri

et al. 2024

Eng. Res. Express

View full text Add to dashboard Cite

In aluminium extrusion process, metal flow is greatly controlled by the die geometry and a variety of intricate profiles can be achieved by designing dies of different configurations. In porthole die extrusion, number of portholes used for a profile is often determined by the subjective knowledge of designers. Nevertheless, extrusion load and weld strength of profile produced are not only dependent on extrusion ratio, temperature of deformation but also on the number of portholes along with other die geometry variables. In the present investigation, systematic studies were carried out on three different dies with four ports, three and two ports around die center to extrude profiles of outer diameter 29.4 mm and thickness 2mm. Numerical simulations were carried out for estimation of pressure, temperature, strain, and strain rate parameters in the weld chamber for all the dies, followed by press trials and profiles produced were subjected to wedge expansion test. The results from numerical simulations indicated that pressure generated inside weld chamber increases with number of portholes. The surface plots indicated highest pressure of about 280 MPa for four port hole and about 276 MPa for three ports die and pressure of about 160 MPa was estimated for two port hole die at the entry of weld chamber , which is 65mm from profile end. Similarly, temperature at profile exit was 551 0C for four portholes die and 546 0C for three portholes die and 537 0C for two portholes die. Furthermore, press trials indicated peak extrusion loads of 5241 kN, 4406 kN and 3961 kN respectively for four, three and two portholes die. Thus, the peak extrusion load decreased by about 16 % for three port and about 25 % for two ports die in comparison with four port die. Also, the extruded profiles in wedge expansion test indicated mean compression load of 22.70±0.14 kN in four porthole die, mean compression load 22.29±0.26 kN for three port die and mean compression load of 17.841± 0.27 kN.

show abstract

Application and analysis of spread die and flat container in the extrusion of a large-size, hollow, and flat-wide aluminum alloy profile

Cited by 20 publications

References 13 publications

Advances on manufacture methods for wide lightweight aluminium stiffened panels

Advances on manufacture methods for wide lightweight aluminium stiffened panels

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

Numerical and experimental investigations on AA6063 extrudates: effect of number of portholes on extrusion load and weld strength

Contact Info

Product

Resources

About