An explorative study on, the influence of an elliptical tool on incremental forming

Vanhove, Hans; Carette, Yannick; Duflou, Joost R.

doi:10.1016/j.promfg.2019.02.108

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…Do et al (2017) endeavored that choosing a tool with the largest diameter for forming results in reduced spring back and enhanced accuracy in SPIF parts. According to Vanhove et al (2019), accuracy can be increased by about 41% in SPIF of AA5754 elements formed via the elliptical tool in a fixed orientation with the sheet blank and forming direction. Mingshun et al (2019) assigned an ultrasonically vibrating tool during the SPIF of AA1060 sheets and reported a reduction in spring back effect and higher accuracy than the traditional SPIF process.…”

Section: Introductionmentioning

confidence: 99%

Improved geometric accuracy in single-point incremental forming of aerospace superalloy 625 using Taguchi desirability function analysis

Bishnoi

Chandna

2023

AEAT

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Purpose This present research aims to identify the optimum process parameters for enhancing geometric accuracy in single-point incremental forming of aviation-grade superalloy 625. Design/methodology/approach The geometric accuracy has been measured in terms of half-cone-angle, concentricity, roundness and wall-straightness errors. The Taguchi Orthogonal-Array L9 with desirability-function-analysis has been used to achieve improved accuracy. Findings To achieve maximum geometric accuracy, the optimum setting having a tooltip diameter of 10 mm, a step-size of 0.2 mm and a tool rotation speed (TRS) of 900 RPM has been derived. With this setting, the half-cone-angle accuracy increases by 42.96%, the concentricity errors decrease by 47.36%, the roundness errors decline by 45.2% and the wall straightness errors reduce by 1.06%. Practical implications Superalloy 625 is a widespread nickel-based alloy, finding enormous applications in aerospace, marine and chemical industries. Originality/value It has been recommended to increase TRS, reduce step-size and use moderate size tooltip diameter to enhance geometric accuracy. Step-size has been found to be the governing parameter among all the parameters.

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Section: Introductionmentioning

confidence: 99%

Improved geometric accuracy in single-point incremental forming of aerospace superalloy 625 using Taguchi desirability function analysis

Bishnoi

Chandna

2023

AEAT

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“…They advocated that the formability was critically affected by the step size (SS) and sheet thickness interactions. Vanhove et al (2019) examined the influence of tool-tip shape using a hemispherical tool of 15 mm diameter and an elliptical tool (major axis = 15 mm and minor axis = 8 mm) on the formability of AA5754 parts. They reported better formability of AA5754 parts with the elliptical tool.…”

Section: Introductionmentioning

confidence: 99%

Forming limit diagram and optimization of process parameters in SPIF of Inconel 625 aviation-grade superalloy

Bishnoi,

Chandna

2023

AEAT

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Purpose This paper aims to optimize the single-point incremental forming process variables for realizing higher formability in Inconel 625 components and to plot the forming limit diagram for Inconel 625 aviation-grade superalloy. Design/methodology/approach The formability of Inconel 625 components has been measured in terms of major strain, minor strain and minimum sheet thickness. Response surface methodology with desirability function analysis has been used to achieve maximum formability. The finite element analysis has been conducted at optimal parametric setting. Findings The derived forming limit diagram proves that the maximum forming limit for Inconel 625 is 57.5° at the optimal parametric setting, achieved with desirability of 0.995. The outcomes of finite element analysis conducted at optimal parametric setting show excellent agreement with confirmation experiment results. Practical implications Inconel 625 superalloy is frequently used in aircraft and other high-performance applications for its superior strength. Originality/value It has been suggested that to enhance formability, higher tool rotation speed, minimum step-size, larger tooltip diameter and higher wall angle must be used. Wall angle is the governing parameter among all the parameters.

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“…Vanhove et al [40] also present a possibility for part accuracy improvement. They propose using an elliptical forming tool instead of a hemispherical one for truncated pyramid shape parts machined by incremental forming, as this improves not only dimensional accuracy, but formability and material twisting as well.…”

Section: Introductionmentioning

confidence: 99%

Achieving Accuracy Improvements for Single-Point Incremental Forming Process Using a Circumferential Hammering Tool

Nasulea

Oancea

2021

Metals

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The paper presents a novel solution for improving the accuracy of the wall area of parts manufactured by single point incremental forming. Thus, a forming tool with a special design that works according to the principle of circumferential hammering is deployed, with a direct improving effect of the forming conditions and consequently of the dimensional accuracy of the part. The research is focused on an experimental study of frustum-of-cone shapes manufactured from sheet metal blanks of DC05 deep drawing steel of 1 mm thickness. A typical customary technological setup is used for the single point incremental forming process, without any additional elements, and two forming tools, a hemispherical and a special one, which use the circumferential hammering effect. Several preliminary tests using both tools were performed in order to prove that part accuracy can be significantly improved by using the circumferential hammering tool. The research was further expanded to investigate the influence on part wall dimensional accuracy of three factors: tool spindle speed, tool feed rate and part dimensional configuration. Using a full factorial plan of experiments the results of 32 test runs were processed. All parts were machined adequately, free of any material fracturing. Based on the achieved machining accuracy of the part walls, precision mathematical models were developed for the prediction of part dimensional accuracy in those areas. The mathematical models were validated by practice, as the predicted accuracies were matched by the experimental results.

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An explorative study on, the influence of an elliptical tool on incremental forming

Cited by 10 publications

References 9 publications

Improved geometric accuracy in single-point incremental forming of aerospace superalloy 625 using Taguchi desirability function analysis

Improved geometric accuracy in single-point incremental forming of aerospace superalloy 625 using Taguchi desirability function analysis

Forming limit diagram and optimization of process parameters in SPIF of Inconel 625 aviation-grade superalloy

Achieving Accuracy Improvements for Single-Point Incremental Forming Process Using a Circumferential Hammering Tool

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