Sealing-Spinning Technology for Thin-Walled Aluminum Alloy Tubes

2011 ◽  
Vol 221 ◽  
pp. 259-263
Author(s):  
Li Xia Sun ◽  
Jian Bo Jia ◽  
Yan Xu ◽  
Sheng Yuan Jiang
Keyword(s):  
Aluminum Alloy ◽  
Wall Thickness ◽  
Feed Rate ◽  
External Environment ◽  
Geological Exploration ◽  
Technical Parameters ◽  
Spinning Process ◽  
Thin Walled ◽  
Scientific Value

Thin-walled aluminum alloy tubes can be used as rigid sampling tubes in aerospace and geological exploration and other scientific researches. In order to ensure the scientific value of samples and isolate the external environment, two sealing ends of the rigid sampling tubes are required. In this paper, the sealing-spinning process is adopted to form two sealing ends of the thin-walled aluminum alloy tubes. The results show that rigid sampling tubes with good sealing quality can be formed by controlling the main technical parameters of sealing-spinning process. And the relationships between spinning load and feed rate of roller, spinning load and shape of roller, reducing ratio of wall thickness and feed rate of roller are found.

Numerical Simulation of Double Rollers Clamping Spinning Process for Flanging

2010 ◽  
Vol 97-101 ◽  
pp. 2987-2990 ◽  
Author(s):  
Sheng Dun Zhao ◽  
S.Q. Fan ◽  
Q. Zhang ◽  
C.H. Wang
Keyword(s):  
Wall Thickness ◽  
Feed Rate ◽  
Equivalent Stress ◽  
Equivalent Strain ◽  
Simulation Code ◽  
New Process ◽  
3D Simulation Model ◽  
Spinning Process ◽  
Simulated Distribution ◽  
Wall Thickness Increase

Double rollers clamping spinning (DRCS) is a new process to form thin-walled rotary shell parts with complex flange, which adopts two rollers to clamp the workpiece in the forming. Using FE simulation code ABAQUS/Explicit, the 3D simulation model of DRCS process for flanging is established, and the whole DRCS process and material deformation have been simulated. Distribution of equivalent stress, equivalent strain and wall thickness of flange in the DRCS process are obtained. And then, the effects of roller feed rate and flange length on the formed flange part are studied. Results show that equivalent stress, equivalent strain and reduction in wall thickness increase with the decrease of roller feed rate, while increase with the increase of flange length. The results obtained in this paper can provide the references to determine and optimize the new spinning process parameters.

Study on Spinning Process of a Thin-Walled Aluminum Alloy Vessel Head With Small Ratio of Thickness to Diameter

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
Yanqiu Zhang ◽  
Debin Shan ◽  
Wenchen Xu ◽  
Yan Lv
Keyword(s):  
Aluminum Alloy ◽  
Feed Ratio ◽  
Small Range ◽  
Factors Affecting ◽  
Small Ratio ◽  
Spinning Process ◽  
Conventional Spinning ◽  
Thin Walled ◽  
Line Trajectory ◽  
Blank Size

The thin-walled vessel head with the ratio of thickness to diameter less than 3‰ has long been considered to be difficult to be spun because wrinkling is very likely to occur during the thin-walled vessel head spinning process when the thickness is far smaller than the diameter. Based on process experiments and finite element method, the spinning failure of thin-walled vessel head with a small ratio of thickness to diameter is analyzed in the present research. The mechanism of wrinkling is identified and some effective solutions are discussed to prevent the failure. The results show that the feed ratio, the blank geometry, and the roller trajectory are the main factors influencing the spinning qualities. In the shear spinning, the feasible roller feed ratio is found to be within a very small range because of the thin thickness of blanks. Wrinkling will occur if the feed ratio is slightly outside the operation range. Bending the edge of blank or enlarging the blank size can effectively prevent wrinkling at a larger feed ratio, which would increase the operation range of roller feed ratio. Due to the fact that the conventional spinning is a process of multiple passes, there are many factors affecting the forming quality of thin-walled aluminum alloy vessel head. Wrinkling is likely to happen by the influence of roller trajectory in the first pass due to the fact that the thickness of blank is far smaller than the diameter. The straight-line trajectory is the worst trajectory under which wrinkling is most likely to occur.

scholarly journals INVESTIGATE THE BUSHING SHAPE IN MOULD SUPPORTED THERMAL FRICTION DRILLING

2018 ◽  
Vol 6 (8) ◽  
pp. 226-237
Author(s):  
Zülküf Demir ◽  
Oktay Adiyaman
Keyword(s):  
Aluminum Alloy ◽  
Wall Thickness ◽  
Feed Rate ◽  
Spindle Speed ◽  
Friction Drilling ◽  
Drilling Operations ◽  
Bushing Wall

Although bushing height and wall thickness are crucial issues, cracks and petal formation on bushings affect these outcomes adversely in thermal friction drilling operations. Therefore, in this paper, bushing shapes were investigated both in traditional and mould supported thermal friction drilling of A7075-T651 aluminum alloy, 4 mm in thickness, at 2000 rpm spindle speed and 25 mm/min feed rate. The proportion of the volume cavities (VBC) of the moulds to the volume of the total evacuated material (VE) selected between 16 % and 32 %. Moreover, the gap sizes between the tool and tool proceeding cavity (CDT) were selected at 0.2 mm, 0.3 mm, and 0.4 mm. In conclusion cracks and petal formation were substantially eliminated, bushing height and wall thickness values were able to select, depending on requirements, also homogenous bushing wall thickness for threading, in moulds supporting thermal friction drilling operations.

Research on Ball Spinning Forming of Superalloy Inconel 718 Thin-Walled Tube

2011 ◽  
Vol 189-193 ◽  
pp. 2742-2745 ◽  
Author(s):  
Yong Hua Li ◽  
Tao Fan ◽  
Ning Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Inconel 718 ◽  
Principal Axis ◽  
The Finite Element Method ◽  
Technical Parameters ◽  
Thin Walled Tube ◽  
Spinning Process ◽  
Ball Spinning ◽  
Thin Walled

Ball spinning is an effective process to manufacture thin-walled tubular product of superalloy Inconel 718, which has been used widely in aerospace and other fields. In this literature, ball spinning process of superalloy thin-walled tube was investigated using software DEFORM. The build-up phenomenon and its influencing factors like principal axis speed, axial feed rate and wall thichness reduction were investigated using the finite element method (FEM). The experiment of ball spinning process was perfomed based on the proper technical parameters obtained by simulation. The simulated results agreed well with the experimental results.

Study of Dieless Radial Spinning for Thick-Walled Cylindrical Parts With External Grooves

2021 ◽  
Author(s):  
Famei Liu ◽  
Junsong Jin ◽  
Wei Rao ◽  
Ying Wang ◽  
Chang Gao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Material Flow ◽  
Forming Process ◽  
Forming Quality ◽  
Spinning Process ◽  
Cylindrical Parts ◽  
Forming Characteristics ◽  
Thin Walled ◽  
Aluminum Alloy Tube ◽  
Orthogonal Tests

Abstract Thick-walled cylindrical parts with external grooves are common components in the automobile and aviation fields. Such components can be produced by pressing the outer surface of a spinning thick-walled aluminum alloy tube by the dieless radial spinning process. The forming characteristics in the spinning process and the effects of various process parameters on forming were studied by using orthogonal tests and finite element simulations. During the forming process, bulge and thickness reductions occur because of material flow. The results of an investigation of process parameter effects show that the stress yield ratio (ξ) had no significant effect on forming. However, the feed thickness ratio (η) and initial wall thickness of the tube (t0) crucially affected the forming quality (e.g., the heights of bulges and thickness reduction in the groove area). Thick-walled tubes presented different phenomena compared to the thin-walled.

Minimum Weight of Tapered Round Thin-Walled Columns

1952 ◽  
Vol 19 (3) ◽  
pp. 375-380
Author(s):  
Morris Feigen
Keyword(s):  
Wall Thickness ◽  
Minimum Weight ◽  
Weight Ratio ◽  
Optimum Shape ◽  
Bending Stress ◽  
Round Tube ◽  
Cylindrical Column ◽  
Truncated Cone ◽  
Thin Walled ◽  
Tapered Column

Abstract It is shown that the optimum wall thickness of a cylindrical round tube column is a function of load only and is independent of diameter. The optimum wall thickness of a tapered round thin-walled column is found to be constant along its length. The optimum shape of a tapered round thin-walled column is derived, being that column whose bending stress in the buckled state is constant along its length. The weight ratio of the optimum tapered column to an equal-strength optimum cylindrical column is found to be 0.8924. It is shown that a double truncated cone whose diameter ratio is in the range 0.35 ⩽ D1/D2 ⩽ 0.50 closely approaches the optimum column. If it is specified that no portion of the double truncated cone shall yield, then the weight advantage of the cone over the cylindrical column is rapidly lost as the stress in the cylindrical column approaches the yield stress. In the inelastic range the weight advantage of the tapered column will be less than in the elastic range.

scholarly journals Qualitative Evaluation of Machined Surface of Aluminum Alloy AlCu4Mg1 Depend on Feed Rate

2018 ◽  
Vol 18 (2) ◽  
pp. 201-207
Author(s):  
Frantisek Botko ◽  
Michal Hatala ◽  
Zuzana Mitalova ◽  
Robert Cep ◽  
Miroslav Rimar ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Feed Rate ◽  
Qualitative Evaluation ◽  
Machined Surface
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