Determination of Loading Paths in Warm Hydroforming Reinforced Quadrilateral Tubular Components

Chan, Luen Chow; Kot, Wai Kei Ricky

doi:10.1080/10426914.2013.852210

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…Due to the integrated production of parts with complex sections and the elimination of secondary operations such as welding in parts produced by hydroforming method, the overall weight of the parts is reduced and their strength is increased [3][4][5]. In this process, fluid pressure is used to form the tube with an initial circular cross-section into the form of the die cavity, including polygonal profiles [6,7]. In addition, in many parts, the axial displacement that is inserted into the two ends of the tube by two side jacks, facilitates the metal flowing [8].…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of the ultrasonic vibration effects on the tube hydroforming process in a die with a square cross-section

Shahri

Lakhi

Taheridoustabad

2023

Int J Adv Manuf Technol

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The use of tube hydroforming process to produce integrated parts is growing in various industries. In this research, the hydroforming process has been used to convert the circular cross-section of the tube into a square one. In this process, due to the high hydrostatic pressure of the fluid, the friction in the contact area between the tube and the die surface increases significantly. High friction prevents the metal flowing of the tube material on the die surface and therefore it becomes very difficult to completely form the tube inside the die and obtain sharp corners. In this research, in order to improve the tube formability, applying ultrasonic vibrations to the hydroforming die has been used, which causes a temporary gap to be created in the contact surface of the tube and the die, and therefore the amount of friction is reduced and the tube material can slide more easily. By developing a 3D finite element model, the ultrasonic tube hydroforming process was evaluated. Modal analysis was used to evaluate the different shape modes of the die. The effects of ultrasonic vibrations on the deformation process have been evaluated using two variables: corner radius of square die and average wall thickness. An ultrasonic hydroforming setup was designed to form the annealed copper tube and was stimulated using selected resonance frequencies. The results of the finite element model were validated with the deformed tube in the experimental test. After confirming the results, the numerical model was used to evaluate the process parameters.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of the ultrasonic vibration effects on the tube hydroforming process in a die with a square cross-section

Shahri

Lakhi

Taheridoustabad

2023

Int J Adv Manuf Technol

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“…Yi et al [4] introduced a new combined heating system for the warm hydroforming of light-weight alloy tubes. Hwang et al [5] examined the T-shape hydroforming of an AZ61 magnesium alloy at 150 and 300 • C. Chan and Kot [6] studied the formability of an AZ31B magnesium alloy made by three different loading paths for quadrilateral tubular components fabricated by the warm tube hydroforming process. However, warm tube hydroforming has a limitation on the heating temperature: it is generally kept below 300 • C to prevent the evaporation of fluid media such as oil and water.…”

Section: Introductionmentioning

confidence: 99%

Hot Gas Forming of Aluminum Alloy Tubes Using Flame Heating

Talebi-Anaraki

Chougan

Loh-Mousavi

et al. 2020

JMMP

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Hot metal gas forming (HMGF) is a desirable way for the automotive industry to produce complex metallic parts with poor formability, such as aluminum alloys. A simple hot gas forming method was developed to form aluminum alloy tubes using flame heating. An aluminum alloy tube was heated by a flame torch while the tube was rotated and compressed using a lathe machine and simultaneously pressurized with a constant air pressure. The effects of the internal pressure and axial feeding on expansion and wall thickness distribution were examined. The results showed that the proposed gas forming method was effective for forming aluminum alloy tubes. It was also indicated that axial feeding is a vital parameter to prevent reductions in wall thickness by supplying the material flow during the forming process.

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“…At present, the use of hydroforming, incremental forming, and other methods can improve the plastic forming ability of light alloys [4,5]. The elongation of magnesium alloy can be enhanced at high temperature [6].…”

Section: Introductionmentioning

confidence: 99%

Bending Properties of Mg Alloy Tailored Arc-Heat-Treated Blanks

et al. 2019

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Tailored heat-treated blank is a special kind of sheet, and the plastic forming ability can be improved. In this work, the poor room-temperature plasticity of a tailored magnesium alloy blank was address through arc heat treatment. The formability of the material was enhanced through local modification with arc pretreatment. The plasticity of the tailored arc-heat-treated blank was verified through the V-bending test. The microstructure and mechanical properties of the blank were tested, and the mechanisms underlying its improved deformability were analyzed. The bendability of the blank first increased and then decreased as heat input increased. The maximum V-bending ability of the arc-heat-treated blank increased by 88% relative to that of the untreated blank. Although springback decreased under increasing heat input, the local strength and elastic modulus of the alloy blank were equivalent to those of the base metal. This result indicated that the springback resistance of the material did not improve. The back of the blank treated under the optimal parameters comprised heat-affected zones with good plasticity. Recrystallization and grain growth occurred in the heat-affected zones. The blank exhibited reduced hardness and improved malleability. When the heat input was further increased, however, a semi-melting zone formed on the lower surface of the blank. The formation of this zone resulted in the precipitation of intermetallic compounds from the crystal phase and increased the hardness of the blank. It also decreased the plasticity and malleability of the blank.

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Determination of Loading Paths in Warm Hydroforming Reinforced Quadrilateral Tubular Components

Cited by 11 publications

References 9 publications

Numerical and experimental investigation of the ultrasonic vibration effects on the tube hydroforming process in a die with a square cross-section

Numerical and experimental investigation of the ultrasonic vibration effects on the tube hydroforming process in a die with a square cross-section

Hot Gas Forming of Aluminum Alloy Tubes Using Flame Heating

Bending Properties of Mg Alloy Tailored Arc-Heat-Treated Blanks

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