Hot Stretch Bending and Creep Forming of Titanium Alloy Profile

Deng, Tongsheng; Li, Dongsheng; Li, Xiaoqiang; Ding, Pan; Zhao, Kai

doi:10.1016/j.proeng.2014.10.234

Cited by 28 publications

(11 citation statements)

References 4 publications

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“…The traditional forming method of titanium alloy is hot forming due to its poor formability at room temperature. The traditional hot forming methods of titanium alloy include superplastic forming [6], isothermal forming [7], hot gas bulging forming [8], and creep forming [9]. These forming methods generally require that the heating temperature of sheet is 870~975°C, the heating temperature of tool is 600~850°C, and the strain rate is approximately 10 −5~1 0 −2 s −1 [10].…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on formability of TC4 alloy in a novel multi-layer sheet hot stamping process

Yang

Wang

Zhou

2020

Int J Adv Manuf Technol

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In this study, a novel modified hot stamping process is proposed to prevent the heat loss of titanium alloy sheet during transferring and stamping. A technology which is two steel sheets clamping one titanium alloy sheet (the sandwich structure) to transfer and deform was used in the multi-layer sheet hot stamping process. The formability of TC4 alloy under the triple-layer sheet hot stamping condition was studied by means of experiment and numerical simulation. The influence of sheet temperature, stamping speed, and blank holder force on the depth and thickness uniformity of parts was analyzed. The results show that the deepdrawing depth of titanium alloy parts is improved and the thickness uniformity of parts is better by using the triple-layer sheet hot stamping process proposed in this paper. On the one hand, the flow stress of the TC4 alloy is low because of the less heat loss in the triple-layer sheet hot stamping process. On the other hand, the TC4 alloy sheet can be deformed better because of the changing of the friction situation of the titanium alloy sheet. And the contact force between titanium alloy sheet and steel sheet is less because of the protection of two steel sheet under the triple-layer sheet hot stamping condition. With the sheet temperature increasing, the deep-drawing depth of titanium alloy parts increases by 22.2% from 27 mm of 750°C to 33 mm of 900°C. Compared with the single-layer sheet hot stamping process, the stamping depth of titanium alloy parts obtained by the triple-layer sheet hot stamping process increases by 135.7% at 900°C, and the local thinning of titanium alloy sheet is improved. Due to strain rate strengthen and the uniform distribution of sheet temperature, the thickness uniformity of parts is improved with the increase of stamping speed. Based on the microstructure observation tests, it is can be seen that more equiaxed α phase of TC4 alloy parts can be obtained by the triple-layer sheet hot stamping process.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on formability of TC4 alloy in a novel multi-layer sheet hot stamping process

Yang

Wang

Zhou

2020

Int J Adv Manuf Technol

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“…This extensive research is directed on the uniform-contact state [20], the effects of friction on the stretch-forming limit curves [1], industrial equipment improvements [7,26,27], or process design and effects [26,28] on the deformability. Experimental or numerical studies are mainly based on the analysis of metallic materials that are related to the automotive and aviation sectors; as a result, aluminum (AA6061-T4 [2], AA6082 [18], AA2024, AA1050, [29,30]), magnesium (LZ91, AZ31, ZE10, ME21 [31,32]), titanium (OT04, Ti-6Al-4V [31][32][33]) or steel (CR1 grade [34])-based alloys are intensively researched.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

et al. 2021

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An industrial process is defined through its quality of parts and their production costs. Labour-intensive operations must be applied to produce high-quality components with inexpensive resources. Recent development in dedicated software allows the industrial sector to rely on more and more autonomous solutions to obtain an optimum ratio between part quality and cost. The stretch forming process is an operation that has a high degree of difficulty, due to the process parameters and the spring-back effect of materials. Our approach to solving several of the shortcomings of this process was to develop a self-adaptive algorithm with computer vision capabilities that adapts to the process in real-time. This experimental study highlights the results obtained using this method, as well as a comparison to a classical method for the stretch-forming process (SFP). The results have noted that the stretch-forming algorithm improves the process, while adapting its decisions with each step.

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“…Another possibility to minimize springback and to form harder materials is the hot stretch bending. Through an additional heating unit, materials difficult to form such as titanium alloys have a good workability [8]. Stretch bending, however, is restricted in its degree of freedom and enables only large bending radii [9].…”

Section: Introduction/state Of the Artmentioning

confidence: 99%

Analysis of incremental die bending of wires and tubes

Holstein

Hermes

Tekkaya

2020

Prod. Eng. Res. Devel.

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The use of bent wires, tubes, and profiles has a broad application in the industry as it is based on a great number of possible applications. Both structures with a high light-weight construction potential as well as functional and aesthetic geometry can be realised expediently. Known processes are often limited in case of tight radii and complex bending contours that cut each other or that are similar to a loop. The so called incremental die bending provides the remedy. It is an innovative process for the production of complexly shaped workpieces in the form of bent wires, tubes, or profiles. The bending process in case of incremental die bending is different to conventional processes, since a die is reshaped. With this process the semi-product is put into a hard bending shape by a moving feeding unit. The process is very accurate and at the same time cost-effective, since almost any bending contours can be produced form-based in one working stage. Furthermore, the die geometry enables the manufacture of contours that were previously very work-intensive or not producible at all.Publisher's Note Springer Nature remains neutral with regard tojurisdictional claims in published maps and institutional affiliations.

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Hot Stretch Bending and Creep Forming of Titanium Alloy Profile

Cited by 28 publications

References 4 publications

Numerical and experimental study on formability of TC4 alloy in a novel multi-layer sheet hot stamping process

Numerical and experimental study on formability of TC4 alloy in a novel multi-layer sheet hot stamping process

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

Analysis of incremental die bending of wires and tubes

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