Investigation of forming accuracy in mandrel-free hot-spinning

Imamura, Yoshihide; Ikawa, Ken; Sakane, Yuto; Iwasaki, Hayato; Hirakawa, Takeo

doi:10.1016/j.proeng.2017.10.925

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…Monitoring and controlling the temperature of the forming part is made possible by a pyrometer and feed-back control to the induction heating power source. In previous studies [4,5], the feasibility of this forming process for Ti-6Al-4V alloy was confirmed. Fig.…”

Section: Mandrel-free Hot-spinningmentioning

confidence: 57%

“…From the above investigation, the forming accuracy of hot spun products used large initial material showed the same trend as that in the previous work that used 490 mm dia. x 17 mm thick Ti-6Al-4V alloy plate [5]. In this study, finally the flange part was completely bent in the direction of forming process because the both initial material thickness and the forming height are larger than previous one.…”

Section: Results Of Forming Test and Materials Characterizations Propementioning

confidence: 78%

“…With respect to these issues, a mandrel-free hot-spinning near-net-shape forming technique has been developed for especially expensive titanium alloy aircraft engine components. The feasibility of the forming process for Ti-6Al-4V alloys was reported in previous studies [4,5].…”

Section: Introductionmentioning

confidence: 69%

“…1 (a). In the previous study [5], the flange part was tilted toward the direction of forming process with an increased initial material thickness. To prevent this flange deformation, a support roller was introduced in this study.…”

Section: Experimental Methodsmentioning

confidence: 95%

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An Experimental Study for the Development of Mandrel-Free Hot-Spinning for Large Size Titanium Alloy Plate Forming

Imamura

Ikawa

Motoyama

et al. 2018

Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy

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A mandrel-free hot-spinning was developed as a near-net-shape titanium alloy plate forming technique. In this work, a Ti-6Al-4V alloy conical product with a wall angle of 34 degrees and 170mm height was formed from a large size Ti-6Al-4V plate (890∼920mm dia. × 30mm thick). The product was characterized metallurgically and mechanical properties were measured, and the shape of formed products was investigated. It was found that the mandrel-free hot-spinning is able to form a large size titanium alloy plate. Material properties including tensile strength and microstructure of the formed products satisfied the material specifications. Fatigue stress of the formed product was higher than that of the typical Ti-6Al-4V material. For a further improvement, a forming method using pre-formed material was proposed and which was successfully conducted with two types of preforms and found to be effective in the forming process.

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Section: Mandrel-free Hot-spinningmentioning

confidence: 57%

Section: Results Of Forming Test and Materials Characterizations Propementioning

confidence: 78%

Section: Introductionmentioning

confidence: 69%

Section: Experimental Methodsmentioning

confidence: 95%

See 2 more Smart Citations

An Experimental Study for the Development of Mandrel-Free Hot-Spinning for Large Size Titanium Alloy Plate Forming

Imamura

Ikawa

Motoyama

et al. 2018

Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy

Self Cite

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show abstract

“…Kawai et al [38] recorded better roundness of the spun products of A 1050-O annealed aluminum blanks than those of A 1050-H. Razani et al [39] observed higher out-of-roundness as the feed rate rises. However, Imamura et al [40] proved that as the feed ratio increases, the roundness error decreases for higher forming heights. With lower forming heights, a reverse relationship was observed.…”

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

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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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Marginal-restraint mandrel-free spinning process for thin-walled ellipsoidal heads

Lin

Chen

et al. 2020

Adv. Manuf.

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Investigation of forming accuracy in mandrel-free hot-spinning

Cited by 6 publications

References 6 publications

An Experimental Study for the Development of Mandrel-Free Hot-Spinning for Large Size Titanium Alloy Plate Forming

An Experimental Study for the Development of Mandrel-Free Hot-Spinning for Large Size Titanium Alloy Plate Forming

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

Marginal-restraint mandrel-free spinning process for thin-walled ellipsoidal heads

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