Simulated Analysis of Flow and Deformation in Trilateral Constrained and Asymmetric Square Cup Deep-Drawing

2011 ◽  
Vol 199-200 ◽  
pp. 1901-1905
Author(s):  
Li Cheng Huang ◽  
Xiao Ting Xiao ◽  
Li Guang Tan ◽  
Guo Liang Li
Keyword(s):  
Numerical Simulation ◽  
Stainless Steel ◽  
Friction Coefficient ◽  
Sheet Metal ◽  
Deep Drawing ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Forming Quality ◽  
Simulated Analysis

To satisfy the local forming need of sheet-metal part, numerical simulation of SUS304 stainless steel deep-drawing with trilateral constrained slot were carried out by employing the analytical software ETA/dynaform5.5. The influence of different friction coefficient and holder force on the forming quality was analyzed by taking the inflow volume while parts forming 50mm as standard. The results show that the effect of trilateral constraint on the uneven flow and deformation of flange. And some measures were illustrated to improve the quality of some of these parts.

Study of the Parameters of Deep Drawing Process Based on the Simulation of Dynaform

2012 ◽  
Vol 249-250 ◽  
pp. 51-58
Author(s):  
Qing Wen Qu ◽  
Tian Ke Sun ◽  
Shao Qing Wang ◽  
Hong Juan Yu ◽  
Fang Li
Keyword(s):  
Friction Coefficient ◽  
Sheet Metal ◽  
Deep Drawing ◽  
Drawing Process ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Deep Drawing Process ◽  
Drawing Die ◽  
Drawing Speed

A simulation of deep drawing process on the sheet metal was done by using Dynaform, the influence of blank holder force, deep drawing speed and friction coefficient on the forming speed of sheet metal in the deep drawing process were got. The forming speed of sheet metal determines the quality of deep drawing, in the deep drawing process the blank holder force and the deep drawing speed are controllable parameters, the friction coefficient can be intervened and controlled, and it’s a manifestation of the interaction of all parameters, the main factors which influence the friction coefficient just have blank holder force, deep drawing speed and lubrication except the material. The conclusion of this study provides the basic data for the analysis of the lubrication of mould, the study of lubricant and the prediction of the service life of deep drawing die.

3D Parametric Unfolding Method for Sheet-Metal Part

2014 ◽  
Vol 488-489 ◽  
pp. 79-82
Author(s):  
Bo Sun ◽  
Long Chen
Keyword(s):  
Sheet Metal ◽  
3D Modeling ◽  
Mathematic Model ◽  
Design System ◽  
Automatic Design ◽  
Sheet Metal Part ◽  
Metal Part ◽  
3D Environment ◽  
Unfolding Method

The unfolding is the first step for the manufacturing of the sheet-metal part, which plays a major role for the accuracy and quality of the final product. Unfortunately, the inefficiency of the traditional drawing-based method made the process boring and sometime confusing. The CAD method made benefit for the designer. By means of the 3D modeling kernel and the mathematic model of unfolding process, the automatic design system of sheet-metal part was developed, in which the models are parametric and in 3D environment.

Numerical Simulation of the Effect of Punch Paths on the Quality of Sheet Metal Stretch Forming

2012 ◽  
Vol 217-219 ◽  
pp. 2002-2005
Author(s):  
Chang Jiang Wang ◽  
Diane J Mynors ◽  
Tarsem Sihra
Keyword(s):  
Numerical Simulation ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Finite Element Modelling ◽  
Metal Strip ◽  
Stretch Forming ◽  
Forming Quality ◽  
Element Modelling

Presented here is the simulation of uniaxial stretch forming using two punches in a sheet metal forming operation. In the finite element modelling, the sheet metal strip was held by two bank holders and two punches are able to move in two directions to stretch the sheet metal. Due to the friction between the punch and sheet metal, it was found that friction affects the sheet metal forming quality, however by adopting an optimal punch path the effect of friction in sheet metal forming can be reduced. The effect of punch paths on the quality of the sheet metal are also reported in this paper.

scholarly journals Modelling real contact areas caused by material straining effects in sheet metal forming simulation

2021 ◽  
Author(s):  
Peter Essig ◽  
Mathias Liewald ◽  
Maximilian Burkart ◽  
Maxim Beck
Keyword(s):  
Sheet Metal ◽  
Surface Pressure ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Forming Simulation ◽  
Contact Areas ◽  
Surface Pressure Distribution

Shortened product development processes in automotive industry combined with the upcoming lack of experts do challenge sheet metal part production fundamentally. Tryout time and manufacturing costs of large forming dies today are significantly influenced by their digitally supported engineering. The forming process by such tools is beside other influences is affected by elastic deformations of forming dies and press structure as well as contact areas between die and sheet metal part. In deep drawing such contact areas are influenced by the blank properties and the flange behavior in terms of thickening and thinning. Recent developments in sheet metal forming simulation do consider advanced friction models and structural modeling of die and press components improving simulation accuracy. Nevertheless thinning or thickening of sheet metal results into localized surface pressure distribution during deep drawing. For this reason, it is not sufficient to use the currently common practice of homogeneous surface pressure distribution in sheet metal forming simulation. In this respect, this paper presents a numerical approach for consideration of straining effects in the sheet metal part during forming operation. For this purpose, a systematic process improvement was developed in this paper to identify contact areas via a numeric simulation parameter. Validating the numerical investigation, a rectangle cup die is used, considering major strain. The main results of this contribution for that reason show how simulated contact areas can be estimated by reverse engineering of real forming parts. Hereby straining based contact areas lead to a novel contact area design in process planning, resulting in efficient die tryout.

scholarly journals Analysis on Deformation Process in Deep Drawing of Sheet Metal Part by FEM

2014 ◽  
Vol 11 (4) ◽  
pp. 06-16
Author(s):  
Ramesh Kanttikar ◽  
◽  
Bharath S Kodli ◽  
Ravi B Chikmeti
Keyword(s):  
Sheet Metal ◽  
Deep Drawing ◽  
Deformation Process ◽  
Sheet Metal Part ◽  
Metal Part

Numerical Simulation of Sheet Metal without Burr in the Process of Blanking Based on DEFORM for Manufacturing Engineering

2012 ◽  
Vol 583 ◽  
pp. 276-280
Author(s):  
Shu Tian Fan ◽  
Yong Wu
Keyword(s):  
Numerical Simulation ◽  
Stainless Steel ◽  
Sheet Metal ◽  
Cross Section ◽  
Important Application ◽  
Manufacturing Engineering ◽  
Deform 2D ◽  
Two Stages ◽  
Blanking Process

A blanking method which can punch the sheet metal without burr is presented, this method is divided into two stages: preloading deformation and blanking. And the FEM software DEFORM-2D is used to simulate the blanking process of burr-free of stainless steel AISI304. By changing the size of relative clearance, analyzing the quality of cross-section and blanking process. The result shows that the clearance has an effect on blanking force and the length of shear zone. which provides the certain fundamental for predicting the defects of blanking pieces and designing the molds. And this method has an important application value in manufacturing engineering.

scholarly journals Numerical simulation study of influence of friction coefficient of die based on Abaqus on V-shaped clamp stamping parameters

2021 ◽  
Vol 13 (2) ◽  
pp. 168781402098842
Author(s):  
Shuqian Wu ◽  
Yonghong Fu ◽  
Guoqing Wu ◽  
Mengmeng Xia
Keyword(s):  
Numerical Simulation ◽  
Friction Coefficient ◽  
Material Flow ◽  
Surface Friction ◽  
Mold Surface ◽  
Surface Design ◽  
Forming Quality ◽  
Before And After ◽  
Comparison And Analysis

To improve the forming quality of V-shaped clamps, a basis for optimal V-shaped clamp mold surface design is provided. In this paper, the V-shaped clamp stamping process is simulated using Abaqus and the influence of the mold’s friction coefficient on the V-shaped clamp stamping parameters is revealed. The regional friction coefficient of the V-shaped clamp mold surface is optimized using an equal horizontal design scheme and the optimal friction coefficient combination for the mold surface is obtained, along with comparison and analysis of the molding parameters before and after optimization. Results show that the mold’s surface friction properties have significant regional characteristics. Increasing the friction coefficient of the bottom, the rounded section of the punch’s V-shaped groove and the bulge filleted corner of the punch while reducing the friction coefficient of the bulge filleted corner and crimping area of the die head contributes to the material flow. Mold surface optimization makes the material flow velocity more uniform, disperses stress on the part’s surface, reduces strain and thickness reduction of the key parts, and improves overall quality. Measurements show that the V-shaped clamp mold’s surface friction characteristics affect the molding parameters significantly and mold optimization improves the V-shaped clamp’s molding quality.

Methods of Metal Parts Unfolding

2014 ◽  
Vol 989-994 ◽  
pp. 3310-3313
Author(s):  
Yang Li ◽  
Jie Gang Zhang ◽  
Ji Guang Li ◽  
Yu Chen Li
Keyword(s):  
Sheet Metal ◽  
Metal Structure ◽  
Body Structure ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Metal Parts ◽  
Sheet Metal Parts

There are a variety of sheet metal parts in rocket body structure. The exact length calculation of sheet metal structure work is the key to ensure better quality of product. This paper describes two methods of sheet metal part unfolding which are method of formula and method of software. Two quick unfolding ways using AUTOCAD and EXCEL are described aim at method of formula. Summarize the notes of using Pro/E to unfold aim at method of software. span>Parts Unfolding

scholarly journals Experimental Investigation on Micro Deep Drawing of Stainless Steel Foils with Different Microstructural Characteristics

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Jingwei Zhao ◽  
Tao Wang ◽  
Fanghui Jia ◽  
Zhou Li ◽  
Cunlong Zhou ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Deep Drawing ◽  
Annealing Temperature ◽  
Localized Deformation ◽  
Microstructural Characteristics ◽  
Height Profile ◽  
Annealing Temperatures ◽  
Micro Deep Drawing ◽  
Profile Distribution

AbstractIn the present work, austenitic stainless steel (ASS) 304 foils with a thickness of 50 µm were first annealed at temperatures ranging from 700 to 1100 ℃ for 1 h to obtain different microstructural characteristics. Then the effects of microstructural characteristics on the formability of ASS 304 foils and the quality of drawn cups using micro deep drawing (MDD) were studied, and the mechanism involved was discussed. The results show that the as-received ASS 304 foil has a poor formability and cannot be used to form a cup using MDD. Serious wrinkling problem occurs on the drawn cup, and the height profile distribution on the mouth and the symmetry of the drawn cup is quite non-uniform when the annealing temperature is 700 ℃. At annealing temperatures of 900 and 950 ℃, the drawn cups are both characterized with very few wrinkles, and the distribution of height profile, symmetry and mouth thickness are uniform on the mouths of the drawn cups. The wrinkling becomes increasingly significant with a further increase of annealing temperature from 950 to 1100 ℃. The optimal annealing temperatures obtained in this study are 900 and 950 ℃ for reducing the generation of wrinkling, and therefore improving the quality of drawn cups. With non-optimized microstructure, the distribution of the compressive stress in the circumferential direction of the drawn foils becomes inhomogeneous, which is thought to be the cause of the occurrence of localized deformation till wrinkling during MDD.

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