The New Preforging Method of Closed-Die Forging with Controlled-Flash for Steering Knuckles

2012 ◽  
Vol 482-484 ◽  
pp. 2409-2413
Author(s):  
Lian Jun Cheng ◽  
Tie Zhu Zhang ◽  
Hong Xin Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Utilization Rate ◽  
3D Finite Element ◽  
Key Technology ◽  
Forging Process ◽  
Die Forging ◽  
Closed Die Forging ◽  
3D Finite Element Method ◽  
Material Utilization

In this paper, the new forging process for forming the steering knuckle of the truck is proposed, which includes preforming, preforging and finish-forging. The key technology of new forging process is focused on the preforging design. The closed-die forging with controlled-flash process for the preforging is proposed, by which the material utilization rate is enhanced greatly. The proper preforming includes three steps: rod extrusion, fork flatting and cleaving. The 3D finite element method (FEM) for simulation the forging process is also presented. The new and the traditional forging processes of producing the steering knuckle are compared too.

Numerical Simulation of Hot Die Forging Process of Ti-6Al-4V Alloy Blade

2017 ◽  
Vol 898 ◽  
pp. 1325-1331 ◽  
Author(s):  
Jia Hao Chen ◽  
Jin Shan Li ◽  
Bin Tang ◽  
Li Hua Du ◽  
Hong Chao Kou
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Stress Distribution ◽  
Strain Distribution ◽  
3D Finite Element ◽  
Forging Process ◽  
Die Forging ◽  
3D Finite Element Method ◽  
Deformation Area ◽  
Hot Die Forging

Ti-6Al-4V alloy is used extensively in aerospace industries due to its excellent properties. In this paper, the hot die forging process of the Ti-6Al-4V alloy blade was simulated by using 3D finite element method. Based on the model, the effect of process parameters on the deformation was investigated. The results show that the increase of temperature is beneficial to improving the uniformity of stress distribution. The slower the declining velocity of upper die is, the larger the strain gradient of severe deformation area will be. In addition, the stress distribution gets uniform with velocity decreasing. The large friction coefficient can make strain distribution uneven and cause symmetry of stress distribution. The proposed numerical simulation of hot die forging of blade in the present work may yield important information for the development of hot die forging techniques and the manufacture of blade.

Bending Analysis of SMA Embedded Rectangular Laminated Sandwich Plates with Soft Core Using 3D Finite Element Method

2011 ◽  
Vol 110-116 ◽  
pp. 1458-1465 ◽  
Author(s):  
M. Khadem ◽  
M. M. Kheirikhah
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Transverse Shear ◽  
Soft Core ◽  
Shear Stresses ◽  
Sandwich Plates ◽  
3D Finite Element ◽  
Bending Analysis ◽  
Transverse Shear Stresses ◽  
3D Finite Element Method

Nowadays Shape Memory Alloys (SMAs) are used as actuators in many applications such as aerospace structures. In sandwich structures, the SMA wires or plates are used in the skins for shape control of the structure or vibration damping. In this paper, bending behavior of sandwich plates with embedded SMA wires in their skins is studied. 3D finite element method is used for construction and analysis of the sandwich plate with a flexible core and two stiff skins. Some important points such as continuity conditions of the displacements, satisfaction of interlaminar transverse shear stresses, the conditions of zero transverse shear stresses on the upper and lower surfaces and in-plane and transverse flexibility of soft core are considered for accurate modeling and analysis of sandwich structures. Solution for bending analysis of sandwich plates under various transverse loads are presented and the effect of many parameters such as plate dimensions, loading conditions, material properties of core, skins and SMA wires are studied. Comparison of the present results in special case with those of the three-dimensional theory of elasticity and some plate theories confirms the accuracy of the proposed model.

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