Flange forming at an arbitrary tube location through upsetting with a controllable deformation zone

2019 ◽  
Vol 273 ◽  
pp. 116230 ◽  
Author(s):  
Shengfa Zhu ◽  
Xincun Zhuang ◽  
Dongkai Xu ◽  
Yin Zhu ◽  
Zhen Zhao
Keyword(s):  
Deformation Zone ◽  
Flange Forming ◽  
Controllable Deformation

Prefabricated Hole Mathematical Model of Flange-Forming of Tee Pipe with Square Branch

2013 ◽  
Vol 395-396 ◽  
pp. 1154-1157
Author(s):  
Zhong Lei Wang ◽  
Zhao Dong Li ◽  
Gang Cheng ◽  
Xin Kai Zhang
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
Numerical Method ◽  
Deformation Zone ◽  
Difficult Problem ◽  
Hole Size ◽  
Element Simulation ◽  
Flange Forming ◽  
The Mathematical Model ◽  
Square Hole

Based on the principle that in the deformation zone the length of bore plain wire does not change, a mathematical model of the prefabricated hole for flange-forming of square hole tee pipe is established, for the difficult problem of the flange-forming prefabricated hole size design for square hole tee pipe. To solve the mathematical model, a numerical method and a software system for the mathematical model is established. In order to verify the reliability of the mathematical model and its solution, the method of finite element simulation is applied to verify the mathematical model and the solving system. The results show that the mathematical model constructed in this paper can relatively accurately make calculation of prefabricated hole size for flange-forming of square hole tee pipe.

Mathematical Model Establishment of Prefabricated Hole Flange-Forming of Equal Diameter Tee Pipe

2012 ◽  
Vol 588-589 ◽  
pp. 1767-1770
Author(s):  
Wen Sheng Yuan ◽  
Zhong Lei Wang ◽  
Zhao Dong Li ◽  
Gang Cheng
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Deformation Zone ◽  
Difficult Problem ◽  
Software System ◽  
Hole Size ◽  
Element Simulation ◽  
Flange Forming ◽  
The Mathematical Model

For the difficult problem of the flange-forming prefabricated hole size design for tee pipe, based on the principle that in the deformation zone the length of bore plain wire does not change, make the establishment of a mathematical model of the prefabricated hole flange-forming of tee pipe, and by value solving methods to solve the mathematical model, establish a software system for prefabricated hole flange-forming of equal diameter tee pipe. In order to verify the reliability of this article to build the mathematical model and its solution, taking engineering for example, apply the method of finite element simulation to verify the mathematical model and the solving system, and the results show that the mathematical model constructed in this paper can relatively accurately make calculation of prefabricated hole size of flange-forming of equal diameter tee pipe.

Mathematical Model Establishment of Prefabricated Hole Flange-Forming of Unequal Diameter Tee Pipe

2013 ◽  
Vol 364 ◽  
pp. 500-503
Author(s):  
Zhong Lei Wang ◽  
Zhao Dong Li ◽  
Xin Kai Zhang
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
Numerical Method ◽  
Finite Element Simulation ◽  
Deformation Zone ◽  
Difficult Problem ◽  
Hole Size ◽  
Element Simulation ◽  
Flange Forming ◽  
The Mathematical Model

Based on the principle that in the deformation zone the length of bore plain wire does not change, a mathematical model of the prefabricated hole flange-forming of unequal diameter tee pipe is established, for the difficult problem of the flange-forming prefabricated hole size design for tee pipe. To solve the mathematical model, a numerical method and a software system for The solution of the mathematical model is established. In order to verify the reliability of this article to build the mathematical model and its solution, taking engineering for example, apply the method of finite element simulation to verify the mathematical model and the solving system, and the results show that the mathematical model constructed in this paper can relatively accurately make calculation of prefabricated hole size of flange-forming of unequal diameter tee pipe.

scholarly journals Sheet Bulk Forming of Thin-Walled Components with External Gearing through Upsetting Using Controllable Deformation Zone Method

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Xincun Zhuang ◽  
Meile Liang ◽  
Shengfa Zhu ◽  
Yin Zhu ◽  
Zhen Zhao
Keyword(s):  
Material Flow ◽  
Deformation Zone ◽  
Effective Strain ◽  
Sheet Forming ◽  
Forming Process ◽  
Zone Method ◽  
Forming Mechanism ◽  
Bulk Forming ◽  
Thin Walled ◽  
Controllable Deformation

AbstractSheet-bulk metal forming (SBMF) is a promising process for manufacturing complex sheet components with functional elements. In this study, the entire forming process for a typical thin-walled component with external gearing is investigated, including sheet forming and bulk forming processes. Deep drawn cups are prepared during sheet forming; subsequently, upsetting is performed on the sidewall to form external gearing. The upsetting method performed is known as upsetting with a controllable deformation zone (U-CDZ). Compared with the conventional upsetting method, a floating counter punch with a counter force is used in the U-CDZ method such that the forming mechanism is changed into the accumulation of the deformation zone instead of deformation throughout the entire sidewall. The effects of the counter force and material flow are investigated to understand the mechanism. The forming quality, i.e., the formfilling and effective strain distribution, improved, whereas a high forming load is avoided. In addition, a punch with a lock bead is used to prevent folding at the inner corner during the experiment.

Design Method of Prefabricated Hole Flange-Forming of Hemispherical Shell Parts

2013 ◽  
Vol 694-697 ◽  
pp. 3025-3028
Author(s):  
Zhong Lei Wang ◽  
Zhao Dong Li ◽  
Gang Cheng ◽  
Yang Li
Keyword(s):  
Mathematical Model ◽  
Numerical Method ◽  
Deformation Zone ◽  
Design Method ◽  
Difficult Problem ◽  
Software System ◽  
Hole Size ◽  
Hemispherical Shell ◽  
Flange Forming ◽  
The Mathematical Model

Based on the principle of the length unchanged and the principle of the area unchanged in the deformation zone, a mathematical model of the flange-forming prefabricated hole of hemispherical shell parts is established, for the difficult problem of designing the flange-forming prefabricated hole size for hemispherical shell parts. To solve the mathematical model, a numerical method and a software system for the solution of the mathematical model is established. The feasibility of the mathematical model and solving method is demonstrated by the simulation of the typical flange-forming of Hemispherical Shell Parts.

scholarly journals Optimization of Controllable Deformation Zone And Die Wear of Aluminum Crown Forgings For Shock Absorber Assembly

2021 ◽  
Author(s):  
Hui-Zhen Su ◽  
Ming-Hsiu Ho ◽  
Jyun-Kai Shih ◽  
Cheng-Fu Huang ◽  
Hao-Yun Ku ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Deformation Zone ◽  
Computer Aided Design ◽  
Shock Absorber ◽  
Hot Forging ◽  
Processing Parameters ◽  
Die Design ◽  
Design Factor ◽  
Die Wear ◽  
Controllable Deformation

Abstract In this research, numerical analysis, response surface method (RSM) and experiments are used to investigate and verify the hot forging process for manufacturing aluminum crown forgings for shock absorber assembly. First, establish the computer aided design (CAD) model of the die and the billet, and simulate it from the finite element method (FEM). Second, a new preforming die was designed with a preformed dressing of controllable deformation zone (CDZ) by the CAD software. Third, numerical simulation was combined with RSM to optimize the processing parameters with the aim of minimizing the die wear while the integrity of forgings should be prioritized preserved. According to RSM, the billet size and preformed dressing of CDZ are important factors affecting the distance between die and workpiece (C). The optimal design factor of the preforming die: billet diameter (D), billet length (L) and flash design (F) are 40 mm, 205 mm and CDZ 1, respectively. Through the results of FEM, this study describes the distribution of microscopic grain flow lines are highly related to forming, stress, strain, and temperature as well as die design such as CDZ in preformed dressing. In order to accurately verify that the parameters analyzed by the RSM, both numerical analysis and physical experiments are carried out and optimal scheme exhibit reasonable consistency.

Simulation of vibration piercing of pipe blank at press

2020 ◽  
Vol 76 (11) ◽  
pp. 1128-1138
Author(s):  
S. R. Rakhmanov
Keyword(s):  
High Frequency ◽  
Deformation Zone ◽  
Pipe Blank ◽  
Equipment Operation ◽  
Metal Deformation ◽  
Technological Tool ◽  
High Frequency Vibrations ◽  
Pipe Blanks ◽  
Wave Phenomena

In some cases, the processes of piercing or expanding pipe blanks involve the use of high-frequency active vibrations. However, due to insufficient knowledge, these processes are not widely used in the practice of seamless pipes production. In particular, the problems of increasing the efficiency of the processes of piercing or expanding a pipe blank at a piercing press using high-frequency vibrations are being solved without proper research and, as a rule, by experiments. The elaboration of modern technological processes for the production of seamless pipes using high-frequency vibrations is directly related to the choice of rational modes of metal deformation and the prediction resistance indicators of technological tools and the reliability of equipment operation. The creation of a mathematical model of the process of vibrating piercing (expansion) of an axisymmetric pipe blank at a piercing press of a pipe press facility is an actual task. A calculation scheme for the process of piercing a pipe plank has been elaborated. A dependence was obtained characterizing the speed of front of plastic deformation propagation on the speed of penetration of a vibrated axisymmetric mandrel into the pipe workpiece being pierced. The dynamic characteristics of the occurrence of wave phenomena in the metal being pierced under the influence of a vibrated tool have been determined, which significantly complements the previously known ideas about the stress-strain state of the metal in the deformation zone. The deformation fields in the zones of the disturbed region of the deformation zone were established, taking into account the high-frequency vibrations of the technological tool. It has been established that the choice of rational parameters (amplitude-frequency characteristics) of the vibration piercing process of a pipe blank results in significant increase in the efficiency of the process, the durability of the technological tool and the quality of the pierced blanks.

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