Investigation of the Feasibility of a Novel Heat Stamping Process for Producing Complex-shaped Ti-6Al-4V Panel Components

Tian, Famin; Li, N.

doi:10.1016/j.promfg.2020.04.267

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Meanwhile, I phase could be used as a negative material for NiMH batteries due to its high discharge capacity [30]. In addition, [31] adopted the segmented quenching process at 800˚C -950˚C, which reduced the strain softening performance and caused the dynamic phase transition from β phase to α phase. In the process of sample preparation, RQ is mainly used to improve grain size, grain boundary and phase composition [32].…”

Section: Rapid Quenchingmentioning

confidence: 99%

Recent Advances on Preparation Method of Ti-Based Hydrogen Storage Alloy

Liang¹,

Wang²,

Rong³

et al. 2020

MSCE

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Section: Rapid Quenchingmentioning

confidence: 99%

Recent Advances on Preparation Method of Ti-Based Hydrogen Storage Alloy

Liang¹,

Wang²,

Rong³

et al. 2020

MSCE

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“…Wang et al [ 20 ] propose Fast light Alloys Stamping Technology (FAST), where fast heating is employed to maintain the post-form strength but not impairing the formability. Moreover, Tian and Li [ 21 ] studied the hot stamping process for forming complex-shaped titanium alloy components, combining heat treatment and fast stamping. Although hot forming improves the drawability, it requires more expenditure on heating and the use of protective atmospheres to prevent increased gas (oxygen, hydrogen and nitrogen) absorption by titanium.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of Titanium Sheet Forming for Medical Instrument Parts

et al. 2022

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The paper analyses the forming of the surgical instrument handles made of Grade 2 titanium sheets. Sheet metal forming is a technology ensuring high strength and light weight of products. Replacing stainless steels with titanium further reduces instrument weight and additionally provides the required resistance to corrosive environments typical for surgeries. The low instrument weight is important to prevent fatigue of surgeons and allow them to maintain high operational accuracy during long term surgeries. The numerical analysis of the technological process was performed in order to adapt it to forming tool handles using titanium sheets instead of steel sheets. The numerical calculations were experimentally verified. It was found that, in the case of titanium handles, it is necessary to use a blank holder in the first forming operation to eliminate sheet wrinkling in the flange area. The shape and dimensional accuracy of the drawn part after trimming were high enough and the 4th forming operation became unnecessary. Moreover, the process modification included lubrication using rapeseed oil with the addition of boric acid, which effectively prevents the galling of titanium on the working surfaces of the steel tools and ensures a more uniform distribution of plastic strains in the drawn part.

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“…The method proved to be fast, inexpensive, and accurate, but with the drawback that the part is only calibrated locally; that is, in the region of the location of the weld, where tight dimensional control is needed. In addition to the strategies mentioned above, some other processes could be used for improving the dimensional accuracy of metal-formed products, for example, stretch bending [28,29], sheet stamping with stiffening ribs [30,31], the hot form quench (HFQ) process [32,33], heat treatment before/after forming [34][35][36], and so on. However, in these processes, the dimensional accuracy of the formed products could be assured in the condition that the input blank, e.g., extruded profiles, could well meet the standard extrusion tolerances.…”

Section: Introductionmentioning

confidence: 99%

Deformation Characteristics in a Stretch-Based Dimensional Correction Method for Open, Thin-Walled Extrusions

Zhou

Welo

et al. 2021

Metals

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Dimensional accuracy of incoming components is crucial for automated welding and assembly in mass volume production. However, thin-walled extrusions made to industrial standards show severe dimensional variations, including gap opening, sidewall inclination, local convexity, and so on. Thus, one major challenge is to provide a low-cost correction method to improve the dimensional accuracy at a level demanded by automated assembly and/or product fit-up. A novel correction method called transverse stretch and local bending (TSLB) has recently been developed, enabling one to efficiently correct the dimensional deviations in thin-walled, U-channel profiles at a low cost. However, the lack of in-depth understanding of the underlying mechanism makes it challenging to efficiently optimise and control the process. In this study, the feasibility of this new technique was experimentally validated by four groups of TSLB tests with different profile dimensions, showing a dimensional accuracy improvement of about 92% compared with the as-received parts. The evolution of the critical dimensional characteristics, including gap opening and bottom convexity, is analysed numerically throughout four stages consisting of inserting, releasing, calibration, and springback. It is found that the inserting stage greatly reduces the dimensional deviations in a pure bending state, while the calibration stages further minimise the deviations in the bending and transverse stretching combined state. In addition, the wedge angle of the tool is found to be critical to the dimensional accuracy improvement. The low wedge angle facilitates the correction of sidewall inclination and gap opening, while the high wedge angle contributes to mitigating bottom convexity. The overall outcome of this study enhances the fundamental understanding of the effects of in-process stretching and local-bending on the dimensional capabilities of U-channel extrusions. This can ultimately generate guidelines that will lead to new application areas of aluminium extrusions in highly competitive marketplaces.

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Investigation of the Feasibility of a Novel Heat Stamping Process for Producing Complex-shaped Ti-6Al-4V Panel Components

Cited by 4 publications

References 20 publications

Recent Advances on Preparation Method of Ti-Based Hydrogen Storage Alloy

Recent Advances on Preparation Method of Ti-Based Hydrogen Storage Alloy

Numerical and Experimental Analysis of Titanium Sheet Forming for Medical Instrument Parts

Deformation Characteristics in a Stretch-Based Dimensional Correction Method for Open, Thin-Walled Extrusions

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