Integrated bottom up and top down approach to optimization of the extrusion process

Vaneker, Thomas H.J.; Koenis, P.T.G.; Ouwerkerk, Gijs van; Nilsen, K.E.; Houten, Frederikus J.A.M. van

doi:10.1016/j.cirp.2008.03.075

Cited by 6 publications

(8 citation statements)

References 5 publications

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“…Hence, it is necessary to gain information about the influence of technological parameters ( [14]). Extrusion offers unique construction and design possibilities, with different functional characteristics ( [12,[15][16][17]). Also, it is an extremely complex process associated with several variables, from numerous sources and in the various phases of the process, and must be controlled to ensure product and customer's specificity's, as well as the minimum scrap production ( [18,19]).…”

Section: Of 19mentioning

confidence: 99%

“…Pressure [30], [31], [32], [26], [49], [48], [12] and [51]. Geometry [23], [27], [50], [28], [26], [25], [48], [13] and [17].…”

Section: Dimensionsmentioning

confidence: 99%

“…From these tables results, the die and the number of holes in the die (Number of Holes: E_NH) are similar, i.e., these are variables without relevant variability. However, it is well known from literature that die geometry, as well as the components used, are causes of the amount of scrap generated in a profile ( [13,17,23,28]). [23] concluded that geometry is a parameter that should be well adjusted for each alloy type.…”

Section: Empirical Studymentioning

confidence: 99%

“…[28] points out that die geometry is the main cause of defects in profiles. In this sense, the work developed by [17] presents rules for the development of matrices, considering matrices design extremely important in the production of the quality profile. The work developed by [13] considers that defects in dies and tools are the main source of profile defects and, consequently, scrap generation.…”

Section: Empirical Studymentioning

confidence: 99%

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Sustainable and Optimized Production in an Aluminum Extrusion Process

Ferrá,

Correia,

De Almeida

et al. 2024

Preprint

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In the discussion on environmental policies, the notion of eco-efficiency is often used. Eco-efficiency is defined as the delivery of products and services with competitive values, while reducing the ecological impacts and satisfying human needs. In an environment of great competitiveness in which the companies operate, the improvements in the productive process is one of the differentiating factors for guaranteeing a strong competition. Also it is essential rationalizing energy consumption and natural resources. For this it is necessary to understand the main operations and dynamics of the company. This work presents an empirical study of a Portuguese company in the industrial sector. The problematic here presented is based on the company’s growing concern to reduce the amount of scrap produced. From the literature research that was performed, a strong dependence relation between the different variables in the extrusion process was found. The main objective of this work is to model the aluminium extrusion process, with the aim of minimizing the production of scrap. For this several variables involved in the process are taking into account. Using statistical techniques, in particular multiple linear regressions, it was possible to identify the importance of the variables under study for the scrap production.

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Section: Of 19mentioning

confidence: 99%

“…Pressure [30], [31], [32], [26], [49], [48], [12] and [51]. Geometry [23], [27], [50], [28], [26], [25], [48], [13] and [17].…”

Section: Dimensionsmentioning

confidence: 99%

Section: Empirical Studymentioning

confidence: 99%

Section: Empirical Studymentioning

confidence: 99%

See 2 more Smart Citations

Sustainable and Optimized Production in an Aluminum Extrusion Process

Ferrá,

Correia,

De Almeida

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Metal flow control can be achieved by die design parameters based on empirical design rules [16]. In this regard, numerical simulation techniques are being increasingly used for achieving velocity uniformity of various profiles, prediction of extrusion loads and also for optimization of process parameters [17,18].…”

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

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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.

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