Design Method of Die Geometry and Pass Schedule by Void Index in Multi-Pass Drawing

2005 ◽  
Vol 127 (1) ◽  
pp. 173-181 ◽  
Author(s):  
Takashi Kuboki ◽  
Masaaki Abe ◽  
Yutaka Neishi ◽  
Masayoshi Akiyama
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cold Working ◽  
Design Method ◽  
Element Analysis ◽  
Die Geometry ◽  
Geometry Design ◽  
Pass Schedule ◽  
Series Of Experiments ◽  
Reduction In Area

The concept for die-geometry design is shown to suppress void growth in multi-pass drawing. First, the void index to evaluate the void fraction in multi-pass drawing was newly proposed based on the well-known equation to predict the fracture limit in cold working. Using finite element analysis, the influence of die geometries on the void index was investigated and it was clarified that the extra-low-angle die is effective whatever reduction in area is adopted. Moreover, dies were designed to have the effect of suppressing void with the minimum die length. A series of experiments was then carried out that successfully verified the numerical results.

Die design by a void index in multi-pass drawing

2002 ◽  
Vol 216 (11) ◽  
pp. 1043-1049 ◽  
Author(s):  
T Kuboki ◽  
H Furuta ◽  
H Yoshikawa ◽  
Y Neishi ◽  
M Akiyama
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Analysis ◽  
Void Fraction ◽  
Void Growth ◽  
Cold Working ◽  
Die Design ◽  
Element Analysis ◽  
Series Of Experiments

Die design was optimized for suppressing the void growth in multi-pass drawing. The void index to evaluate the void fraction in multi-pass drawing was first proposed, based on the well-known equation to predict the fracture limit in cold working. Using finite element analysis, the influence of die geometries on the void index was investigated and dies were designed to have the effect of suppressing void with the least minimum die length. A series of experiments was then carried out to verify the validity of the numerical analysis. The densities of drawn bars were measured and voids in microstructures were observed to verify the validity of the proposed void index.

Optimal Design of Rotary Ultrasonic Vibrator and Research on its Machining Experiments

2010 ◽  
Vol 135 ◽  
pp. 349-354 ◽  
Author(s):  
Yong Jun Tang ◽  
Chun Mu Chen ◽  
Yong Jun Zhang ◽  
Guo Yue Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Work Performance ◽  
3D Model ◽  
Design Method ◽  
Control Design ◽  
Vibration System ◽  
Optimal Method ◽  
Element Analysis ◽  
Series Of Experiments

In order to obtain well work performance, a new design process and the optimal method are systemically presented during ultrasonic vibrator’s design. Firstly, the general dimensions are calculated according to formula of ultrasonic theory. Secondly, 3D model without flange is established, and the best position setting a flange has been conformed through finite element analysis (FEM). Then constraints are laid on the flange, and the best model of vibration is obtained based on model analysis. The results are benefit to the following control design of ultrasonic vibrator. Finally, an ultrasonic vibration system has been made, and a series of experiments validate the feasibility of the design method.

Finite Element Analysis and Optimization of Long-Span Gantry NC Machining Center Structure

2011 ◽  
Vol 346 ◽  
pp. 379-384
Author(s):  
Shu Bo Xu ◽  
Yang Xi ◽  
Cai Nian Jing ◽  
Ke Ke Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Dynamic Performance ◽  
Plate Thickness ◽  
Element Model ◽  
Wall Structure ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Dynamic Performance Analysis

The use of finite element theory and modal analysis theory, the structure of the machine static and dynamic performance analysis and prediction using optimal design method for optimization, the new machine to improve job performance, improve processing accuracy, shorten the development cycle and enhance the competitiveness of products is very important. Selected for three-dimensional CAD modeling software-UG NX4.0 and finite element analysis software-ANSYS to set up the structure of the beam finite element model, and then post on the overall structure of the static and dynamic characteristic analysis, on the basis of optimized static and dynamic performance is more superior double wall structure of the beam. And by changing the wall thickness and the thickness of the inner wall, as well as the reinforcement plate thickness overall sensitivity analysis shows that changes in these three parameters on the dynamic characteristics of post impact. Application of topology optimization methods, determine the optimal structure of the beam ultimately.

Study on Asymmetrical Sheet Rolling by the Finite Element Method

1999 ◽  
Vol 15 (4) ◽  
pp. 149-155 ◽  
Author(s):  
Yeong-Maw Hwang ◽  
Dyi-Cheng Chen ◽  
Gow-Yi Tzou
Keyword(s):  
Finite Element ◽  
Rolling Force ◽  
Speed Ratio ◽  
Element Analysis ◽  
Sheet Rolling ◽  
Useful Knowledge ◽  
Pass Schedule ◽  
The Finite Element Analysis ◽  
Series Of Experiments ◽  
Roll Gap

AbstractAdopting the DEFORM software for the finite element analysis, this study simulated steady-state plastic deformation of the sheet at the roll-gap during asymmetrical sheet rolling. Using FEM code DEFORM, the effects of roll speed ratio, roll radius ratio, friction factor ratio upon the curvature of the rolled product and rolling force were systematically discussed. With a view to verifying the validity of the study simulated, a series of experiments on asymmetrical cold sheet rolling using Aluminum sheet as specimen are carried out. The comparisons between numerical and experimental results show good agreement. Therefore, this numerical model using DEFORM software can offer useful knowledge for designing the pass-schedule of asymmetrical sheet rolling.

Geometry design of vertical probe needle using mechanical testing and finite element analysis

2014 ◽  
Vol 15 (11) ◽  
pp. 2335-2342 ◽  
Author(s):  
Hyock-Ju Kwon ◽  
Jiwon Lee ◽  
Bonghun Shin ◽  
Soo Jeon ◽  
Chung Su Han ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Testing ◽  
Element Analysis ◽  
Geometry Design ◽  
Vertical Probe

scholarly journals Design Method and Finite Element Analysis of a New Prefabricated Steel Special-shaped Lattice Column

2020 ◽  
Vol 198 ◽  
pp. 03012
Author(s):  
Zhenghui Qi ◽  
Xiaotong Peng ◽  
Jie Man ◽  
Chen Lin ◽  
Wenxu Duan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Seismic Behavior ◽  
Design Method ◽  
Steel Structure ◽  
Hysteretic Behavior ◽  
Structural Performance ◽  
Finite Element Models ◽  
Element Analysis

A new steel special-shaped lattice column (SSLC) was proposed, which can be used in prefabricated steel structure residence. The finite element models of four SSLC with different cross-section (L-shaped, T1-shaped, T2-shaped and X-shaped) were established under cyclic loading by using ABAQUS, in which the strength, lateral resist capacity and hysteretic behavior were analyzed. The results indicate that SSLC has adequate strength, stiffness and safety redundancy. Among the four SSLC, the SSLC with X-shaped has the best structural performance and seismic behavior.

scholarly journals An Analytic Verification on Fracture Behavior of Adhesion Exfoliation with Out-plane Shear Mode due to Tapered Angles of 6°and 8° at TDCB Made of Unidirectional Laminated CFRP

2019 ◽  
Vol 8 (2S6) ◽  
pp. 185-189
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Structure Design ◽  
Light Weight ◽  
Analysis Method ◽  
Gas Emission ◽  
Element Analysis ◽  
Finite Element Analysis Method ◽  
Weight Structure

Because of environmental issues, the regulations on gas emission from fossil fuels become stricter. Some investigations are being carried out actively to change the fossil fuel power into electrical power. Researches on the reduction of weight in the transportation machine is also executed. Weight reduction is one of the methods of reducing the gas emission and increasing the range of electrically powered machines. The method of weight reduction includes the development of light weight material and light weight structure design method. FRP is the most representative light weight material. Among various FRP materials, (CFRP) has the highest specific strength. Light weight structure design method includes the method of designing the structure by converting the bonding method with bolts and rivets to adhesion method with the use of adhesives. In order to pursue the research on the adhesive structure design method, the research on adhesion exfoliation by using CZM needs to be carried out. There are the researches with various methods in accordance with the style of adhesion exfoliation load and material designs. In this study, the adhesion exfoliation on the tearing fracture of tapered double cantilever beam configuration was applied to the research. Research model was composed by applying the gradient angles of 6° and 8° to TDCB. The model with the gradient angle of 8° has less fracture due to adhesion than that of 8°. The basic data on structural design of adhesion structure were provided by comparatively analyzing the research models. This research was carried out by using finite element analysis method in this study. Finite element analysis method has the advantage of reducing the cost and time taken for experiments in researches. Therefore, the finite element analysis program, ANSYS, was used in this study.

Tie Rod Preload Analysis of a 100MN Hydraulic Press

2011 ◽  
Vol 121-126 ◽  
pp. 3632-3636
Author(s):  
Pei Hao Zhu ◽  
Lian Hong Zhang ◽  
Bing Yu ◽  
Qi Zhi Xie
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Methods ◽  
Design Method ◽  
Hydraulic Press ◽  
Element Analysis ◽  
Mechanics Of Materials

The classical preload design method of prestressed frame of hydraulic presses is based on the assumption that the beams of the frame are rigid, which is not agree with practice. In order to eliminate the unbalance load of the frame of a 100MN hydraulic press due to improper prestressing, tie rod preload distribution in prestressing of the frame is researched with respectively mechanics of materials and the finite element methods. According to mechanics of materials and finite element analysis results, reasonable tie rod preloads and sequence of preloading are obtained and the unbalance load of the frame of the hydraulic press is solved. It also provides references for the preload design of prestressed frame of hydraulic presses.

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