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.

Multiple Influencing Factors Analysis for Non-Conformal Contact Characteristics of Ball Screw

2011 ◽  
Vol 199-200 ◽  
pp. 707-714
Author(s):  
Fu Ji Wang ◽  
Jian Wei Ma ◽  
Zhen Yuan Jia ◽  
Jiang Yuan Yang ◽  
Di Song
Keyword(s):  
High Speed ◽  
Contact Stiffness ◽  
Simulation Method ◽  
Transmission Efficiency ◽  
Ball Screw ◽  
Design Parameters ◽  
Heavy Load ◽  
Theoretical Support ◽  
Element Simulation ◽  
Conformal Contact

The contact between balls and screw races or nut races is a kind of typical non-conformal contact. The study of contact characteristics of ball screw will provide theoretical bases for improving transmission efficiency and working properties of ball screw. In this study, hertz contact theory was adopted to construct the solution formula of ball screw’s contact stiffness, ball screw’s contact characteristics in terms of axial load, design parameters and material properties was analyzed, and the contact deformation value of the contact between ball and screw races was got using finite element simulation method. The simulation result is close to the theoretic value, which proves the correctness of the theory analysis. The present study offers theoretical support for the design and application of high speed, heavy load and precision ball screws.

The Experimental Modal Analysis of High Speed Machining Tool System Based on Integral Polynomial Recognition Method

2012 ◽  
Vol 723 ◽  
pp. 159-163 ◽  
Author(s):  
Fei Xiao ◽  
Xian Li Liu ◽  
Yan Xin Wang ◽  
Li Jia Liu ◽  
Da Qu
Keyword(s):  
Modal Analysis ◽  
High Speed ◽  
Simulation Method ◽  
Experimental Modal Analysis ◽  
Modal Parameters ◽  
High Speed Machining ◽  
Analysis Method ◽  
Recognition Method ◽  
Element Simulation ◽  
Integral Polynomial

According to the principle of the experimental modal analysis, this study is based on tool system of the MIKRON UCP 710 numerical control machining center as test object for experimental modal analysis. Using the integral polynomial recognition method to identify the modal parameters (natural frequency, structural damping, and modal shape), and finally matching the results with the vector analysis method and the finite element simulation method. The results show that integral polynomial recognition method has higher precision than the vector analysis method to identify the multi-degree of freedom system; the experimental modal analysis can also obtain better modal parameters of the structure system, and a higher precision than the finite element simulation method. Obtained the MIKRON UCP 710 high-speed milling center tool system accurate modal parameters provides the necessary theoretical and experimental basis for the further study of the stability properties in the cutting processing of the high speed machining tool system.

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.

Study on Compacting Mechanism of Plate Cross Wedge Rolling High-Speed Rail Screw Spike

2014 ◽  
Vol 494-495 ◽  
pp. 486-490 ◽  
Author(s):  
Si Jia Jiao ◽  
Xue Dao Shu ◽  
Yong Qi ◽  
Bin Hu
Keyword(s):  
Finite Element ◽  
Quality Improvement ◽  
Strain Field ◽  
High Speed ◽  
Coupled Model ◽  
Stress And Strain ◽  
Cross Wedge Rolling ◽  
High Speed Rail ◽  
Element Simulation ◽  
Deform 3D

A thermal mechanical coupled model for High-Speed rail screw spike had been established with the aid of FE software Deform-3D by using rig id-plastic FEM. According to the results of finite element simulation, the metal flowing rules in plastic deforming were discussed. Stress and strain field distribution of Screw Spike were concrete researched. It has important theoretical sense and using values on solving part precision forming and workpiece quality improvement of plat cross wedge rolling.

scholarly journals Study on the Performance of High-Speed Rail Damage of Four Different Materials

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Jiajie Hu ◽  
Wen Zhong ◽  
Qiyue Liu
Keyword(s):  
Plastic Deformation ◽  
High Speed ◽  
Simulation Method ◽  
Contact Condition ◽  
Wear Volume ◽  
Experimental Conditions ◽  
High Speed Rail ◽  
Contact Conditions ◽  
High Speed Railway ◽  
Deformation Layer

For four types of railway rails, corresponding rolling tests have been executed by using the JD-1 wheel/rail simulation device based on the Hertz simulation method, which can ensure the reciprocal contact condition between simulation rail and wheel under experimental conditions approximate to practical contact conditions. The results indicate that, for the rail material which has a higher hardness, the wear volume was less and the plastic deformation layer was thinner after the rolling test, but the crack propagation was more significant and the fatigue damage was severer, showing that its wear resistance was better. The analysis shows that the fatigue resistance of U71Mn rail was better, and considering fatigue is the main failure type for high-speed rail, so it is more suited to the high-speed railway.

scholarly journals DESIGN AND EXPERIMENT OF SEED AGITATOR FOR VERTICAL DISK SEED METERING DEVICE

2021 ◽  
pp. 179-188
Author(s):  
Yulong Chen ◽  
Meng Zhang ◽  
Zeqi Liu ◽  
Yubin Lan ◽  
Lili Yi ◽  
...  
Keyword(s):  
High Speed ◽  
Simulation Method ◽  
Discrete Element Simulation ◽  
Seed Filling ◽  
Element Simulation ◽  
Optimal Value ◽  
Physical Prototype ◽  
Seed Metering Device ◽  
Central Composite

In order to improve the seed filling performance of mechanical hole type seed metering device with high speed, a vertical disc metering device was designed with seed agitator to improve the seed filling probability. Discrete element simulation method and physical prototype bench tests were used to simulate and analyse the seed metering process. The structure parameters of the seed agitators were optimized by the quadratic orthogonal rotation central composite design test. The results showed that: 1) the addition of seed agitator had a significant influence on the MIS (miss index), among which the concave type had the lowest MIS, and it was the highest without agitator; 2) for concave type agitator, the optimal value of depth and angle were 3.1 mm and 60.5°, respectively; 3) the physical prototype tests showed that the QFI (quality of feed index) was more than 95% under the speed of 2-10 km/h, and the MIS was less than 1%, which meets the requirements of precision sowing.

scholarly journals WORKSPACE ANALYSIS OF A FLAME INTRA-ROW WEEDING ROBOT IN VEGETABLE FIELD AND NUMERICAL SIMULATION OF PROPANE COMBUSTION

2021 ◽  
pp. 73-81
Author(s):  
Bing Xu ◽  
Decong Zheng ◽  
Jiaxin Wang ◽  
Youzhi Yang
Keyword(s):  
High Speed ◽  
Simulation Method ◽  
Propane Combustion ◽  
Seed Filling ◽  
Element Simulation ◽  
Workspace Analysis ◽  
Optimal Value ◽  
Physical Prototype ◽  
Seed Metering Device

In order to improve the seed filling performance of mechanical hole type seed metering device with high speed, a vertical disc metering device was designed with seed agitator to improve the seed filling probability. Discrete element simulation method and physical prototype bench tests were used to simulate and analyse the seed metering process. The structure parameters of the seed agitators were optimized by the quadratic orthogonal rotation central composite design test. The results showed that: 1) the addition of seed agitator had a significant influence on the MIS (miss index), among which the concave type had the lowest MIS, and it was the highest without agitator; 2) for concave type agitator, the optimal value of depth and angle were 3.1 mm and 60.5°, respectively; 3) the physical prototype tests showed that the QFI (quality of feed index) was more than 95% under the speed of 2-10 km/h, and the MIS was less than 1%, which meets the requirements of precision sowing.

Research on Prediction of High-Speed Rail Trains Delay Time

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Jing Shi ◽  
Qiyuan Peng ◽  
Ling Liu
Keyword(s):  
Delay Time ◽  
High Speed ◽  
High Speed Rail

THE HIGH-SPEED RAIL HANDBOOK: A TECHNICAL GUIDE1

2018 ◽  
Vol 8 (3) ◽  
pp. 515-530
Author(s):  
Massimo Zucchetti1,2 ◽  
◽  
Keyword(s):  
High Speed ◽  
High Speed Rail
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