The Numerical Simulation of Multi-Directional Forging EQ153 Steering Knuckle

2013 ◽  
Vol 321-324 ◽  
pp. 230-233 ◽  
Author(s):  
Zhi Ming Zhou ◽  
Yang Hu ◽  
Li Wen Tang ◽  
Bao Liang Zhang ◽  
Jing Luo ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Deformation Process ◽  
Effective Strain ◽  
Lower Pressure ◽  
Load Prediction ◽  
Draft Angle ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Deform 3D

This paper centers on EQ153 steering knuckle multi-directional forging forming, and applying Deform-3D to simulation the deformation process. According to temperature, effective strain, load prediction and final forging shape to illustrate in such a process a near-net-shape forming with no flash and little draft angle and lower pressure is been formed.

Numerical Simulation of Equal Channel Angular Pressing for Multi-Pass in Different Routes

2012 ◽  
Vol 268-270 ◽  
pp. 373-377 ◽  
Author(s):  
Xiao Lian Zhao ◽  
Na Chen ◽  
Ning Ning Zhao
Keyword(s):  
Numerical Simulation ◽  
Equal Channel Angular Pressing ◽  
Effective Stress ◽  
Pure Aluminum ◽  
Effective Strain ◽  
Angular Pressing ◽  
3D Software ◽  
Deform 3D

In order to investigate the effect of continued equal channel angular pressing (ECAP) with different routes and passes on the homogeneity of structure, the process of continued ECAP for pure aluminum bar was simulated by DEFORM-3D software. It obtains the load-stroke curves for different passes, distribution of effective stress and effective strain in different routes after the sample is extruded eight passes by ECAP in routes A, BC and C. The results show that the uniformity of the sample is improved with the increase of passes. The microstructure of specimen which is extruded in route BC is the most uniform, but it is the worst in route A.

Optimization of Pre-Forging of the Aircraft Wheel Hub by FEM

2013 ◽  
Vol 652-654 ◽  
pp. 2029-2033
Author(s):  
Yan Yan Dai ◽  
Shi Qiang Lu ◽  
Ke Lu Wang ◽  
Shu Zhe Shang Guan
Keyword(s):  
Numerical Simulation ◽  
Effective Strain ◽  
Fem Simulation ◽  
The Finite Element Method ◽  
Forging Process ◽  
Mould Filling ◽  
Different Shapes ◽  
Deform 3D ◽  
Forging Load ◽  
Shape And Size

Optimization and design for shape and size of pre-forging with numerical simulation have some advantages compared with the conventional methods. The optimization object is the pre-forgings of an aircraft wheel hub. A commercially available software DEFORM 3D is used for the finite element method (FEM) simulation of the forging process of the aircraft wheel hub. The pre-forgings with three different shapes and sizes were used for numerical simulation. The effects of shape and size of the pre-forging on mould filling, forging load, effective strain and effective stress were analyzed. Finally, the suitable shape and size of the pre-forging were obtained based on the numerical simulation results.

Numerical Simulation of Cold Press Forging Forming for Stepped Hole of Thin Sheet Metal

2011 ◽  
Vol 121-126 ◽  
pp. 249-253
Author(s):  
Ke Sheng Wang ◽  
Jian Lin Liu ◽  
Xiao Wei Chen
Keyword(s):  
Numerical Simulation ◽  
Sheet Metal ◽  
Thin Sheet ◽  
Effective Strain ◽  
Optimum Process ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Thin Sheet Metal ◽  
Deform 3D ◽  
Good Agreement

An optimum process for a two-step press forging of stepped holes in a metal sheet was proposed .Numerical simulation on the two-step process was carried out by using DEFORM-3D. Distributions of effective strain and effective stress were obtained. The study showed that the process not only can form the stepped, but also can increase the surface quality and strength of stepped holes in sheet metal parts, According to the numerical simulation’s process parameter , an experimental die was designed, the simulation results were in good agreement with the experimental data

Numerical Simulation and Defects Analyses of Titanium Aluminide Based Alloys Powder Forging

2011 ◽  
Vol 337 ◽  
pp. 192-197
Author(s):  
Wei Zhang ◽  
Yong Liu ◽  
Ming Yang Zhang
Keyword(s):  
Numerical Simulation ◽  
Titanium Aluminide ◽  
Deformation Process ◽  
Stress And Strain ◽  
Deformation Characteristics ◽  
Important Method ◽  
Plastic Deformation Process ◽  
Plastic Forming ◽  
Al Powder ◽  
Deform 3D

Powder forging is an important method for behaviors in a closed die, including the net shape. In order to study the deformation characteristics, the closed die block forging of Ti-Al powder preforms was simulated by commercial plastic forming software DEFORM-3D, using a change of temperature, stress and strain at different regions of the billet. Based on distributions of the stress and strain, the occurrence of defects was analyzed. It indicates that some defects may occur near the edge of preform during the plastic deformation process. At last, the predicted results were evaluated by experiments.

Feasibility Study on Forming Hollow Axle with Multi-Wedge Synchrostep by Cross Wedge Rolling

2012 ◽  
Vol 201-202 ◽  
pp. 673-677 ◽  
Author(s):  
Bao Sou Sun ◽  
Xue Lei Zeng ◽  
Xue Dao Shu ◽  
Wen Fei Peng ◽  
Pei Sun
Keyword(s):  
3D Model ◽  
High Efficiency ◽  
Cross Wedge Rolling ◽  
Hollow Shaft ◽  
Element Simulation ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
3D Software ◽  
Rolling Technology ◽  
Deform 3D

One direction of the cross wedge rolling technology is to realize high-efficiency, precise and near-net-shape forming hollow axle with multi-wedge synchrostep cross wedge rolling. This paper deduced the rotated condition of forming hollow shaft with multi-wedge cross wedge rolling (MCWR) base on forming solid shaft with single-wedge cross wedge rolling, and analyzed technics parameters on the influence of rotated conditions. Through the finite element simulation we got rolling technics parameters on the effect of rolled piece and selecting principle, and then created the 3D model of the equal diameter period of hollow axle with the MCWR. By using DEFORM-3D software, the process of rolling equal diameter period was simulated. The result indicated that it is feasible to roll hollow axle with multi-wedge synchrostep by cross wedge rolling.

Hot Compression Simulation of Ti75 Alloy Based on DEFORM-3D

2012 ◽  
Vol 229-231 ◽  
pp. 55-58
Author(s):  
Jun Fan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Method ◽  
Hot Compression ◽  
Strain Rates ◽  
Know How ◽  
Numerical Simulation Method ◽  
Control Objective ◽  
Finite Element Numerical Simulation ◽  
Deform 3D

To obtain the know-how of the deficiency for the filling capability, taking Ti75 alloy as the research object, at the same height of reducing, strain rates during forming as the control objective, the finite element numerical simulation method was used to simulate the hot compression with DEFORM-3D, analyzing the effect of the strain rates on the distribution of strain and stress.

Modeling and Numerical Simulation Research on Hollow Steel Ingot Forging Process of Heavy Cylinder Forging

2013 ◽  
Vol 712-715 ◽  
pp. 627-632
Author(s):  
Min Liu ◽  
Qing Xian Ma
Keyword(s):  
Numerical Simulation ◽  
Grain Size ◽  
Shear Zone ◽  
Grain Refinement ◽  
Steel Ingot ◽  
Effective Strain ◽  
Meridian Plane ◽  
Forging Process ◽  
Forming Load ◽  
Average Grain Size

Aiming at the disadvantages of low utilization ratio of steel ingot, uneven microstructure properties and long production period in the solid steel ingot forging process of heavy cylinder forgings such as reactor pressure vessel, a new shortened process using hollow steel ingot was proposed. By means of modeling of lead sample and DEFORM-3D numerical simulation, the deformation law and grain refinement behavior for 162 ton hollow steel ingot upsetting at different reduction ratios, pressing speeds and friction factors were investigated, and the formation rule of inner-wall defects in upsetting of hollow steel ingots with different shape factors was further analyzed. Simulation results show that the severest deformation occurs in the shear zone of meridian plane in the upsetting process of hollow steel ingot, and the average grain size in the shear zone is the smallest. As pressing speed increases, the forming load gradually increases and the deformation uniformity gets worse, while the average grain size decreases. An increase in friction factor can increase the peak value of effective strain, but it significantly reduces the deformation uniformity, increases the forming load and goes against grain refinement. Moreover, the four kinds of defects on the inner wall of steel ingot can be eliminated effectively by referring to the plotted defect control curve for hollow steel ingot during high temperature upsetting.

Mechanical Design for Accuracy of Linkage Servo Press for Near-Net Shape Forming

2018 ◽  
Author(s):  
Jing Tao ◽  
Huanan Qian ◽  
Suiran Yu
Keyword(s):  
Mechanical Design ◽  
Structure Design ◽  
Tolerance Allocation ◽  
Component Level ◽  
Eccentric Load ◽  
Servo Press ◽  
Near Net Shape ◽  
Net Shape Forming ◽  
Heavy Loads

The accuracy of machine is important to achieving highly accurate shapes. This paper is focused on mechanical design of highly accurate mechanical linkage servo press applicable to (near-)net shape forming. The effects of geometric errors, deformations under heavy loads and ram tilting are analyzed. A top-down design for accuracy approach is proposed: First, accuracy model for identification of inaccuracy-causing factors and their interlinking relations is developed. Then, based on this model, top accuracy index are decomposed and translated into structure design specifications at component level. Both analytic and simulation methods are employed for design for accuracy in aspects of dimensional and geometric tolerance allocation, stiffness synthesis and anti-eccentric load capability. A case study of mechanical design for accuracy of a six-linkage mechanical servo press is also presented to demonstrate and test the proposed design approaches.

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