scholarly journals Hot Gas Forming of Aluminum Alloy Tubes Using Flame Heating

2020 ◽  
Vol 4 (2) ◽  
pp. 56 ◽  
Author(s):  
Ali Talebi-Anaraki ◽  
Mehdi Chougan ◽  
Mohsen Loh-Mousavi ◽  
Tomoyoshi Maeno
Keyword(s):  
Aluminum Alloy ◽  
Wall Thickness ◽  
Thickness Distribution ◽  
Forming Process ◽  
Hot Gas ◽  
Axial Feeding ◽  
Flame Heating ◽  
Lathe Machine ◽  
Aluminum Alloy Tube ◽  
Hot Gas Forming

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.

scholarly journals Optimization of Superplastic Forming Process of AA7075 Alloy for the Best Wall Thickness Distribution

2021 ◽  
Vol 6 (4) ◽  
pp. 251-261
Author(s):  
Manh Tien Nguyen ◽  
Truong An Nguyen ◽  
Duc Hoan Tran ◽  
Van Thao Le
Keyword(s):  
Wall Thickness ◽  
Deformation Temperature ◽  
Numerical Optimization ◽  
Thickness Distribution ◽  
Superplastic Forming ◽  
Forming Process ◽  
Wall Thickness Distribution ◽  
Surface Method ◽  
Series Of Experiments ◽  
The Relationship

This work aims to optimize the process parameters for improving the wall thickness distribution of the sheet superplastic forming process of AA7075 alloy. The considered factors include forming pressure p (MPa), deformation temperature T (°C), and forming time t (minutes), while the responses are the thinning degree of the wall thickness ε (%) and the relative height of the product h*. First, a series of experiments are conducted in conjunction with response surface method (RSM) to render the relationship between inputs and outputs. Subsequently, an analysis of variance (ANOVA) is conducted to verify the response significance and parameter effects. Finally, a numerical optimization algorithm is used to determine the best forming conditions. The results indicate that the thinning degree of 13.121% is achieved at the forming pressure of 0.7 MPa, the deformation temperature of 500°C, and the forming time of 31 minutes.

Numerical Simulation of Bulging Process of Aluminum Alloy Sheet

2013 ◽  
Vol 327 ◽  
pp. 112-116 ◽  
Author(s):  
Mao Ting Li ◽  
Yong Zhang ◽  
Chui You Kong
Keyword(s):  
Aluminum Alloy ◽  
Material Flow ◽  
Thickness Distribution ◽  
Superplastic Forming ◽  
Alloy Sheet ◽  
Pressure Loading ◽  
Forming Process ◽  
Element Analysis ◽  
Danger Zone ◽  
Linear Finite Element

Basing on software MSC. Marc of non-linear finite element analysis, the article has studied the material flow in the process of aluminum alloy superplastic gas bulging forming. By analyzing of the thickness distribution of the molding member it confirm the danger zone in the forming process. By analyzing of pressure loading curve influence on forming part. Because the aluminum alloy is widely used in the industrial departments, it is supposed to improve the ability of forming ability of aluminum alloy by researching the superplastic forming.

scholarly journals Numerical and Experimental Investigation on Tube Hot Gas Forming Process for UHSS

2018 ◽  
Vol 1063 ◽  
pp. 012172
Author(s):  
Pengzhi Cheng ◽  
Yulong Ge ◽  
Yong Xia ◽  
Qing Zhou
Keyword(s):  
Experimental Investigation ◽  
Forming Process ◽  
Hot Gas ◽  
Hot Gas Forming

scholarly journals Investigation on precision and performance for hot gas forming of thin-walled components of Ti2AlNb-based alloy

2018 ◽  
Vol 190 ◽  
pp. 07001
Author(s):  
Xueyan Jiao ◽  
Zhiqiang Liu ◽  
Yong Wu ◽  
Gang Liu
Keyword(s):  
Process Parameters ◽  
Microstructure Evolution ◽  
Element Model ◽  
Parameters Optimization ◽  
Forming Process ◽  
Performance Control ◽  
Hot Gas ◽  
Thin Walled ◽  
And Performance ◽  
Hot Gas Forming

Ti2AlNb-based alloys have received considerable attention as potential materials to replace the nickel alloy at 600-750 °C, depending on their advantages of high specific strength, good corrosion and oxidation resistance. To realize the precision and performance control for Ti2AlNb-based alloy thin-walled components, the microstructure evolution was analyzed for setting up the unified viscoplastic constitutive equations based on the physical variables and simulating the forming process coupled between the deformation and the microstructure evolution. Through the finite element model with coupling of microstructure and mechanical parameters, the microstructure evolution and shape fabricating can be predicted at the same time, to provide the basis for the process parameters optimization and performance control. With the reasonable process parameters for hot gas forming of Ti2AlNb thin-walled components, the forming precision and performance can be controlled effectively.

Deformation Behavior of Aluminum Alloy Tube in Semi-Dieless Metal Bellows Forming Process with Local Heating Technique

2014 ◽  
Vol 936 ◽  
pp. 1742-1746 ◽  
Author(s):  
Zi Cheng Zhang ◽  
Kenichi Manabe ◽  
Tsuyoshi Furushima ◽  
Kazuo Tada ◽  
Osamu Sasaki
Keyword(s):  
Aluminum Alloy ◽  
Compression Ratio ◽  
Deformation Behavior ◽  
Heating Temperature ◽  
Local Heating ◽  
Manufacturing Cost ◽  
Forming Process ◽  
Alloy Tube ◽  
Metal Bellows ◽  
Aluminum Alloy Tube

The metal bellows are used in a large number of industrial applications for their flexile and elastic properties. For the traditional manufacturing methods for metal bellows, the dies and (or) tools are required. It is inconvenient to change the shape of metal bellows and also leads to the high cost. To reduce the manufacturing cost and produce the metal bellows with various shapes, the semi-dieless metal bellows forming process was proposed. The deformation behavior of aluminum alloy tube in semi-dieless bellows forming process was investigated in the study. The effects of compression ratio, heating length on the convolution height, pitch of bellows during the semi-dieless bellows forming process were studied. The results showed that the deformation conditions of semi-dieless forming process have significant influences on the shape of aluminum alloy bellows and deformation behavior of aluminum alloy tube in the forming process. The increase of compression ratio, heating temperature and heating length resulted in the increase of pitch and decrease convolution height of aluminum alloy metal bellows.

Research on Superplastic Gas Bulging Forming of 5A06 Aluminium Alloy Sheet

2014 ◽  
Vol 722 ◽  
pp. 50-55
Author(s):  
Bao Peng Bi ◽  
Yong Wang ◽  
Radik R. Mulyukov ◽  
M.V. Markushev
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Equation ◽  
Aluminium Alloy ◽  
Wall Thickness ◽  
Thickness Distribution ◽  
Thin Wall ◽  
Alloy Plate ◽  
Wall Thickness Distribution ◽  
Study Results ◽  
5A06 Aluminum Alloy

Based on Backofen constitutive equation of 5A06 aluminum alloy at high temperature tensile test, get 5A06 aluminum alloy best superplastic constitutive equation parameters: when T= 400°C,m=0.39, K=270.34.5A06-O aluminum alloy cup gas bulging forming process is simulated with using the method of MARC finite element analysis .By designing a variety of shapes of bilge preform die, to align the bulging parts first post mode when carries on the different effects of the thinning deformation, and analyzes its influence on cup final thickness distribution of the rule.The superplastic test and positive and negative bulging simulation study results of 5A06-O aluminium alloy plate for commercial supply condition (the original thickness of 2 mm) show that the optimized blow the thinning deformation is greatly improve the cylindrical pieces of the final wall thickness distribution, the most in thin wall thickness from the simple was blowing bulging of increased by 0.94 mm, 0.65 mm Wall thickness distribution index is 0.079.

Process Parameter Optimization for Better Hydro-Forming Performance of a Trailing Arm Tube

2013 ◽  
Vol 465-466 ◽  
pp. 704-708
Author(s):  
Shen Yung Lin ◽  
Hong Yi Liao
Keyword(s):  
Process Parameters ◽  
Wall Thickness ◽  
Tube Wall ◽  
Thickness Distribution ◽  
Equivalent Stress ◽  
Process Parameter ◽  
Hydraulic Pressure ◽  
Forming Process ◽  
Tube Wall Thickness ◽  
Forming Characteristics

This work presents the tube forming characteristics of a trailing arm which the whole forming processes are arranged through pre-bending twice and hydro-forming once. This work utilizes the finite element method to simulate the hydro-forming process of the trailing arm by changing the process parameters, such as velocity of left and right punches and internal hydraulic pressure, etc. The effects of process parameters on the distribution states of the tube wall-thickness, distribution of equivalent stresses and strains, and formability of the forming arm are thus investigated. Taguchi method, orthogonal array and factor response are then applied together to determine the optimal process parameter combinations corresponding to two single-quality objects, minimum tube wall-thickness and maximum equivalent stress, with nominal-the-best and smaller-the-better, respectively. It shows that the velocity of the right punch for the billet material axial feeding supplement should be larger than that of the left punch preventing the uneven bursting of the tube-wall on right-end. The analysis of variance also shows that left punch velocity is a major contribution parameter for tube wall-thickness while that primarily affects the equivalent stress is the internal pressure.

Numerical Simulation of Eccentric Extrusion Form Bending Pipe Parts

2011 ◽  
Vol 704-705 ◽  
pp. 1492-1497
Author(s):  
Ji Shun Song ◽  
Yun Tao Li ◽  
De Heng Du ◽  
Xu Ma ◽  
Kang Yin
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Field Distribution ◽  
Three Dimensional ◽  
Die Design ◽  
Forming Process ◽  
Alloy Tube ◽  
Extrusion Forming ◽  
Aluminum Alloy Tube

Eccentric extrusion method is used in this paper，through this method achieved bending aluminum-alloy tube extrusion forming process. Used finite element method，achieved three-dimensional numerical simulation of bending aluminum-alloy tube in eccentric extrusion by DEFORM-3D finite element commercial software，analyzed velocity field distribution，material flow，squeezing pressure，stress and strain field distribution of the process；Introduce the mechanism of one step direct extrusion forming tube bending process，it will be of great guiding significance the actual die design.

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