Metal Flow Rule of Multi-Way Tube Hydro Forming for Air Handling Unit

2011 ◽  
Vol 239-242 ◽  
pp. 1597-1600
Author(s):  
Hua Dian Wen ◽  
Xiao Ting Xiao ◽  
Kai Zhang ◽  
Ying Chen
Keyword(s):  
Deformation Process ◽  
Metal Flow ◽  
Simulation Method ◽  
Work Piece ◽  
Flow Rule ◽  
Distribution Law ◽  
Air Handling Unit ◽  
Forming Technology ◽  
Element Simulation ◽  
Tube Hydro Forming

Multi-way tube on air conditioning header is considered as the research objective .Finite element simulation method is utilized to simulate and analyze the deformation process of metal. Through analyzing the distribution law of velocity on work piece neutral plane and displacement law of typical nodes, common law in deformation process for metal flow was revealed. Results suggested that: metal which is on terminal supplementary zone conspicuously flows along horizontal. Metal which is on forming zone conspicuously flows along bulge, metal which is between bulges flows little, these laws provide a reference for the choice of forming technology.

Forging Process Design and Simulation Optimization of a Complex-Shaped Aluminium Alloy Component

2018 ◽  
Vol 941 ◽  
pp. 784-789 ◽  
Author(s):  
Yan Chen ◽  
Song Wei Wang ◽  
Hong Wu Song ◽  
Shi Hong Zhang
Keyword(s):  
High Speed ◽  
Metal Flow ◽  
Simulation Method ◽  
Production Test ◽  
Alloy Component ◽  
High Speed Rail ◽  
Forging Process ◽  
Good Surface ◽  
Element Simulation ◽  
Steel Castings

In order to meet the requirements of lightweight and replace steel with the aluminum for a component on the high speed rail, the forging process of a complex-shaped aluminum alloy component was researched and the parameters were optimized with the DEFORM-3D finite element simulation technology. The qualified products were finally obtained instead of the original steel castings by reducing weight of 65%. It is noted that the parts with complicated shape and non-symmetry, metal flow uneven during forging process that lead to incomplete forming, higher forging pressure problems. In this paper, such problems were analyzed couple with numerical simulation method based on a certain forming pressure. Moreover, the model and slot was reasonably designed. In addition, the size of blank was constantly optimized to change the metal flows direction and cavity filling mode. Finally, the forgings with good surface quality and mechanical properties were obtained by production test, and can be used as reference for this kind of forging components.

Investigation of Tube Drawing Process by Finite Element Simulation

2012 ◽  
Vol 430-432 ◽  
pp. 1060-1063
Author(s):  
Yong Hua Li ◽  
Jing Zhang ◽  
Xin Jun Liang ◽  
Wei Hua Shi ◽  
Ming Kang
Keyword(s):  
Finite Element ◽  
Metal Flow ◽  
Equivalent Strain ◽  
High Accuracy ◽  
Flow Rule ◽  
Drawing Process ◽  
Tube Drawing ◽  
Conical Angle ◽  
Element Simulation ◽  
Convenient Route

Tube drawing is a convenient route to manufacture near net tubular product with high accuracy. In this paper, the tube drawing process was investigated through finite element method. The metal flow rule of tube drawing and influence of mold conical angle on the drawing force and equivalent strain during tube drawing process were studied. The reasonable mold conical angle was obtained from the simulated results.

The Influence of Process Parameters on the Branch Height for Air Handling Unit

2011 ◽  
Vol 314-316 ◽  
pp. 759-762
Author(s):  
Hua Dian Wen ◽  
Xiao Ting Xiao ◽  
Li Guang Tan ◽  
Kai Zhang ◽  
Ying Chen
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Process Parameters ◽  
Air Conditioning ◽  
Simulation Method ◽  
Influence Of Process Parameters ◽  
Branch Diameter ◽  
Air Handling Unit ◽  
Fillet Radius ◽  
Element Simulation

Multi-way tube on air conditioning header is considered as the research objective .Finite element simulation method is utilized to simulate and analyze the influence of process parameters on branch height such as branch diameter、branches distance、branch numbers、tube thickness and die fillet radius. The result shows that with the increase of branch diameter, die fillet radius and tube thickness, the branch height increases. It also shows that with the increase of branch numbers and branches distance, the branch height decreases generally.

Analysis on Temperature Field of Work-Piece during Cross Wedge Rolling

2011 ◽  
Vol 230-232 ◽  
pp. 352-356
Author(s):  
Wen Ke Liu ◽  
Kang Sheng Zhang ◽  
Zheng Huan Hu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Metal Flow ◽  
Work Piece ◽  
Contact Deformation ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Rigid Plastic ◽  
Finite Element Software ◽  
Deform 3D

Based on the rigid-plastic deformation finite element method and the heat transfer theories, the forming process of cross wedge rolling was simulated with the finite element software DEFORM-3D. The temperature field of the rolled piece during the forming process was analyzed. The results show that the temperature gradient in the outer of the work-piece is sometimes very large and temperature near the contact deformation zone is the lowest while temperature near the center of the rolled-piece keeps relatively stable and even rises slightly. Research results provide a basis for further study on metal flow and accurate shaping of work-piece during cross wedge rolling.

A Research of Shaft Modal Simulation Method Based on the Preloaded Angular Contact Ball Bearing

2013 ◽  
Vol 389 ◽  
pp. 364-370
Author(s):  
Bei Li ◽  
Jian Bin Zhang ◽  
Lu Sha Jiang
Keyword(s):  
Simulation Analysis ◽  
Simulation Method ◽  
Numerical Control ◽  
Angular Contact Ball Bearing ◽  
Tightening Force ◽  
Shaft System ◽  
Element Simulation ◽  
Rolling Element ◽  
Bearing Stiffness ◽  
Main Spindle

In order to analysis modal characteristic of bearing with pre-tightening force on main spindle of numerical control lathe, this paper proposes a model of spindle modality analysis. This model is used to simulate the preloaded bearing shaft system modal, and the simulation results are verified by modal experiment. This paper takes 7005c as the research object to establish the equivalent-spring model based on the Hertz theory considering the pre-tightening force, whose focus is dealing with the contact between bearings rolling element and raceway. Then the model will be used to get the bearing stiffness for finite element simulation analysis. The shafting modal with preloaded bearing test platform is structured to get the shaft system modal parameters, which is compared with and verified the simulation analysis.

A Study of Metal Flow Ahead of Tool Face With Large Negative Rake Angle

1982 ◽  
Vol 104 (3) ◽  
pp. 319-325 ◽  
Author(s):  
Y. Kita ◽  
M. Ido ◽  
N. Kawasaki
Keyword(s):  
Deformation Process ◽  
Metal Flow ◽  
Close Relation ◽  
Rake Angle ◽  
High Quality ◽  
Flow Lines ◽  
Stress Changes ◽  
Chip Formation Mechanism ◽  
Maximum Increment ◽  
Side Flow

Although the chip formation mechanism by a tool having a large negative rake angle is not well known, it is very important to make the process clear in order to get high quality in finished surfaces. In this paper, the behavior of material ahead of a tool face with a large negative rake angle is examined by means of low speed machining on lead. The deformation process of the material is investigated by the deformation study combining a finite element method with a grid line method. During cutting, the deformation process of grid lines which were drawn on the sides of testpieces was observed through a side glass which restricted the side flow of material. Cutting force was measured by a dynamometer consisting of an elongated octagonal ring with strain wire gages. As a result it was found that the shear stress on the slip line of maximum increment of shear strain is nearly constant, but the compressive stress changes along the line. It was concave near the top of cutting edge and convex near the surface of the test piece. The position of the change of polarity in the slope shifted depending on the rake angle of the tool. This phenomenon is considered to have close relation with the stagnant tip, which decides not only the size of chip, but also whether or not a chip will be formed. Flow lines of material and the deformed region ahead of tool faces with different negative rake angles were also obtained and they were compared with each other.

Study on Dent Resistance with Whole Process Optimization Method for Body's Cover Based on the Variable Conditions

2013 ◽  
Vol 700 ◽  
pp. 164-169
Author(s):  
Kai Song ◽  
Chao Wang ◽  
Tao Chen ◽  
Ze Zhou
Keyword(s):  
Process Optimization ◽  
Optimization Problems ◽  
Simulation Method ◽  
Optimization Method ◽  
Fast Simulation ◽  
Whole Process ◽  
Element Simulation ◽  
Contact Nonlinearity ◽  
Abaqus Software ◽  
Process Method

This paper aims at cover body dent resistance optimization problems, developed a whole process method using the finite element simulation method and the corresponding engineering experience to solve the dent resistance problem. Use of Tcl/Tk language to develop the script for fast simulation model consider material nonlinearity and contact nonlinearity, Use Abaqus software to calculate the results, and then customized to optimize use of simplified script parameters on changes in the working conditions of the structure will be optimized. The results show that this set of process optimization method to solve the variable conditions dent resistance is quickly, efficiently and accurately.

Study on Metal Forming by Macro-Micro Combine Numerical Analysis

2007 ◽  
Vol 340-341 ◽  
pp. 671-676
Author(s):  
Shao Rui Zhang ◽  
Da Yong Li ◽  
Zhong Wei Yin ◽  
Ying Hong Peng ◽  
Fei Zhou
Keyword(s):  
Metal Forming ◽  
Deformation Process ◽  
Metal Flow ◽  
Yield Function ◽  
Slip Systems ◽  
Crystallographic Slip ◽  
Deformation Properties ◽  
Simulation Results ◽  
True Relation ◽  
Anisotropy Coefficients

It has long been found that the crystal orientations would induce macroscopic anisotropy during deformation process, and then affect the deformation properties of sheet metal. So it is very important to find the true relation between texture distribution and macroscopic anisotropy. In this paper, the anisotropy coefficients of the yield function are fitted by Taylor factor and crystal plastic model. Metal flow is assumed to occur by crystallographic slip on given slip systems within each crystal. Then this simulation results are compared with those of microscopic crystal plastic method.

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