A hybrid mixed double-sided incremental forming method for forming Ti6Al4V alloy

Valoppi, Beatrice; Egea, Antonio J. Sánchez; Zhang, Zixuan; Rojas, Hernan Alberto González; Ghiotti, Andrea; Bruschi, Stefania; Cao, Jian

doi:10.1016/j.cirp.2016.04.135

Cited by 32 publications

(18 citation statements)

References 17 publications

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“…With lower forming heights, a reverse relationship was observed. Valoppi et al [41] achieved enhanced formability and shape accuracy using highly localized two-sided plastic deformation. The localized plastic deformation in the process makes it challenging to control dimensions and shape of final products [10].…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

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Experimental Investigation on the Geometrical Accuracy of the CNC Multi-Pass Sheet Metal Spinning Process

Abd-Alrazzaq¹,

Ahmed²,

Younes³

2018

JMMP

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Abstract:The geometrical accuracy of multi-pass sheet metal spinning products is crucial in many applications. Aerospace, petroleum, and chemical industries motivated the development of modern spun components of complicated shapes with special functionality, but a substantial research lag exists behind this progress. Due to the localized plastic deformation involved, careful control of dimensions and form is required in spinning procedures. In this study, two sets of experiments were implemented for cup manufacturing using a retrofitted computer numerically controlled (CNC) spinning machine to identify the critical factors affecting product geometry and reveal their influence on the shape accuracy of the spun cups. The first set is a screening experiment to determine the most significant parameters and the second provides the optimum processing conditions affecting cup quality. The feed ratio, number of spin-forming passes, spinning ratio, and lubrication were found to have the most important effect on the geometry of the spun cups. Optimum quality with a higher processing speed (productivity) was achieved under a lubricated condition using a larger number of spin-forming passes at a high feed ratio, diminishing the commonly adopted rule of slow spinning for accurate products and reflecting a significance for state-of-the-art spinning practice. The findings of this paper introduce a basis for a spinning quality database.

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Section: Materials and Experimental Methodsmentioning

confidence: 99%

“…With lower forming heights, a reverse relationship was observed. Valoppi et al [41] achieved enhanced formability and shape accuracy using highly localized two-sided plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Geometrical Accuracy of the CNC Multi-Pass Sheet Metal Spinning Process

Abd-Alrazzaq¹,

Ahmed²,

Younes³

2018

JMMP

View full text Add to dashboard Cite

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“…8(b)). Valoppi et al [46] conducted an electrically assisted ADSIF process to form a Ti6Al4V alloy. The electric current was applied directly to two forming tools and the value of electric current was the main variable to control the temperature during the process.…”

Section: Introductionmentioning

confidence: 99%

Double-Sided Incremental Forming: A Review

Peng

Becker

2019

Journal of Manufacturing Science and Engineering

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Incremental sheet-forming (ISF) processes have been developed rapidly in the past two decades. Its high flexibility and easy operability have a significant appeal for industrial applications, and substantial progress has been made in fundamental understanding and demonstration of practical implementation. However, there are a number of obstacles including achievable accuracy and instability in material deformation, which are considered as a main contributing factor for preventing the ISF process to be widely used in industry. As a variant of the general ISF process, double-sided incremental forming (DSIF) uses an additional supporting tool in the opposite side of the workpiece, maintains the flexibility, and at the same time improves the material deformation stability and reduces material thinning. In recent years, there has been increased research interest in looking into DSIF-specific material deformation mechanisms and investigation. This paper aims to provide a technical review of the DSIF process as benchmarked with single-point incremental forming (SPIF). It starts with a brief overview of the current state of the art of both SPIF and DSIF. This is followed by a comparative study between SPIF and DSIF with the key research challenges identified. This leads to a recommendation of future directions for DSIF focused research.

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“…Titanium alloy possesses high strength, good corrosion resistance, and high heat resistance; as such, it is widely used in aerospace applications and in other fields [1][2][3][4][5][6][7]. Ti-6Al-4V, as the trump alloy in the titanium alloy industry, is widely used in engine parts, including titanium alloy blades [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3 shows the true stress curves of the Ti-6Al-4V titanium alloy obtained from the experimental measurements. The rheological behavior of the materials can be expressed as mathematical functions, including the power, exponential, and hyperbolic sine functions as expressed in Equations (1)- (3). The hyperbolic sine function can be adapted to a large stress range; thus, it is widely used in engineering.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on the Thermodynamic Coupling of Ti-6Al-4V Blade Preforms by Cross Wedge Rolling

Dong

Xin

et al. 2018

Metals

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Titanium alloy possesses high strength, good corrosion resistance, and high heat resistance; thus, it is widely used in the aerospace and other fields. Blades of titanium alloy are important components of aero-engines and are essential to the engines operation. In this work, a Ti-6Al-4V blade was formed by cross wedge rolling (CWR) to realize the near net-shape of an aero-engine blade. First, thermal simulation experiments of Ti-6Al-4V were carried out to obtain the thermal deformation constitutive equation of the alloy. The finite element software Deform-3D was then used to simulate the thermodynamic coupling of the forming process, and the metal flow, temperature, and stress–strain distribution laws during the forming process were analyzed. Finally, experimental verification of the Ti-6Al-4V blade was carried out by using an H500 CWR mill. The results revealed the feasibility of applying CWR to preform Ti-6Al-4V blades.

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A hybrid mixed double-sided incremental forming method for forming Ti6Al4V alloy

Cited by 32 publications

References 17 publications

Experimental Investigation on the Geometrical Accuracy of the CNC Multi-Pass Sheet Metal Spinning Process

Experimental Investigation on the Geometrical Accuracy of the CNC Multi-Pass Sheet Metal Spinning Process

Double-Sided Incremental Forming: A Review

Numerical and Experimental Study on the Thermodynamic Coupling of Ti-6Al-4V Blade Preforms by Cross Wedge Rolling

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