The Research on Friction Impacting on Drawing High-Strength Steel

2011 ◽  
Vol 189-193 ◽  
pp. 1858-1861
Author(s):  
Zhong Jin Wang ◽  
Jian Wei Wang ◽  
Yu Wei Shen
Keyword(s):  
Friction Coefficient ◽  
High Strength Steel ◽  
Thickness Distribution ◽  
High Strength ◽  
Simulation Software ◽  
Friction Condition ◽  
Drawing Process ◽  
Element Simulation ◽  
Cylindrical Parts ◽  
Cylindrical Cup

The paper’s main content is that simulating the process—drawing the high-strength steel-DP500 which is used on automobile to the cylindrical cup through the commercial finite element simulation software—Dynaform. Through the simulation, the author analyzes the effect that friction impacts on drawing high-strength steel. The result is that: if the friction coefficient between the blank and the die declines, it can significantly improve the uniform of the blank’s thickness distribution; it can enlarge the processing range of DP500 steel through decreasing the friction coefficient; the springback is sensitive to the change of the friction condition. Generally speaking, in drawing process, improving the friction coefficient is very important to increase the drawing performance of the cylindrical parts.

scholarly journals Research on Hysteretic Performance of Q690 High Strength Steel High-Web Box-Section Steel Column

2021 ◽  
Vol 276 ◽  
pp. 02029
Author(s):  
Jianpeng Sun ◽  
Wei Feng ◽  
RuiPeng Guo ◽  
Chunfeng Liu
Keyword(s):  
Finite Element ◽  
High Strength Steel ◽  
High Strength ◽  
Element Model ◽  
Simulation Software ◽  
Steel Columns ◽  
Box Section ◽  
Element Simulation ◽  
Hysteretic Performance ◽  
Energy Dissipation Capacity

In this paper, the finite element simulation software ABAQUS was used to study the hysteretic performance of Q690 high-strength steel (HSS) and high-web box-section steel columns. The finite element model was established by solid elements, and the influence of the initial defects of materials on the specimen was considered. The hyteretic performance of the specimen was conducted by analyzing and comparing the width-thickness ration of the flanges and the width-thickness ration of the webs. The results show that the increase of width-thickness ratios of the webs and flanges will reduce the hysteresis performance, the energy dissipation capacity and the ultimate horizontal bearing capacity of the specimen.

Research on Finite Element Method of Hot Forming of High Strength Steel Sheet

2021 ◽  
Vol 1032 ◽  
pp. 172-177
Author(s):  
Xiao Da Li ◽  
Xiang Hui Zhan
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
High Strength Steel ◽  
Strong Support ◽  
High Strength ◽  
Hot Forming ◽  
Mold Design ◽  
Deformation Method ◽  
Element Simulation ◽  
Simulation Based

The finite element simulation technology can provide strong support for the optimization of processing technology and the treatment of detailed problems in the processing process. Two finite element methods applied to hot forming of high-strength steel plates are introduced, namely the incremental method and the deformation method. Two methods are used for simulation calculations. The finite element simulation based on incremental theory has high accuracy and requires more complete mold and process information. It is mainly used in the middle and late stages of product and mold design. And the finite element simulation based on deformation theory have fast calculation speeds and are mainly used in the early stages of product and mold design. Both types of methods have high practical value.

Quadrilateral Shape Rib Forming by Roll Forming Process

2018 ◽  
Vol 878 ◽  
pp. 296-301
Author(s):  
Dong Won Jung
Keyword(s):  
Automotive Industry ◽  
High Strength Steel ◽  
Numerical Study ◽  
Thickness Distribution ◽  
High Strength ◽  
Metal Sheet ◽  
Product Performance ◽  
Roll Forming ◽  
Forming Process ◽  
Roll Forming Process

The roll forming is one of the simplest manufacturing processes for meeting the continued needs of various industries. The roll forming is increasingly used in the automotive industry to form High Strength Steel (HSS) and Advanced High Strength Steel (AHSS) for making structural components. In order to reduce the thinning of the sheet product, traditionally the roll forming has been suggested instead of the stamping process. The increased product performance, higher quality, and the lowest cost with other advantages have made roll forming processes suitable to form any shapes in the sheets. In this numerical study, a Finite Element Method is applied to estimate the stress, strain and the thickness distribution in the metal sheet with quadrilateral shape, ribs formed by the 11 steps roll forming processes using a validated model. The metal sheet of size 1,000 × 662 × 1.6 mm taken from SGHS steel was used to form the quadrilateral shape ribs on it by the roll forming process. The simulation results of the 11 step roll forming show that the stress distribution was almost uniform and the strain distribution was concentrated on the ribs. The maximum thinning strain was observed in the order of 15.5 % in the middle rib region possibly due to the least degree of freedom of the material.

Numerical Simulation and Parameter Optimization on Forming Process of Automobile Torque Box

2014 ◽  
Vol 722 ◽  
pp. 140-146
Author(s):  
Wen Juan Zhang ◽  
Long Wu ◽  
Gang Chen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Parameter Optimization ◽  
Process Parameters ◽  
Fem Simulation ◽  
Simulation Software ◽  
Drawing Process ◽  
Forming Process ◽  
Element Simulation

In this paper the drawing process of Box-torque was simulated by Dynaform, which is FEM simulation software. The process parameters, which affected the quality of forming, were optimized by finite element simulation. The emphasis was focus on the optimization of draw-bead and BHF and data were summarized from the optimization graphs. In this simulation, lengthways draw-bead was set on the technical face for reducing or eliminating wrinkle. It was innovation difference from the usual that the draw-bead was set on binder. Finally the correctness of simulation was approved by comparing the optimization of simulation with the data of experimentation.

Investigation on Forming Behaviour of Sheet Metal by Test Using Cylindrical Cup with Hole

2018 ◽  
Vol 789 ◽  
pp. 51-58
Author(s):  
Bhadpiroon Watcharasresomroeng
Keyword(s):  
Sheet Metal ◽  
High Strength Steel ◽  
High Strength ◽  
Materials Testing ◽  
Drawing Ratio ◽  
Blank Holder ◽  
Steel Sheets ◽  
Fuel Consumption Rate ◽  
Materials Used ◽  
Cylindrical Cup

Nowadays, there are several grades of sheet metal used in the automotive industry. Highstrength steel sheets, particularly, have been widely used in order to reduce the weight of vehicles,which is strongly related to their fuel consumption rate. However, it is generally known that thestrength of the sheets, which is relatively higher than that of the conventional carbon steel sheets,results in their low formability. In this work, the limiting drawing ratio and forming behavior of sheetmetal that is conventionally used for automobile parts were evaluated by test using cylindrical cupwith hole. The feasibility to use limiting cup height for comparing formability of sheet metal was alsoincluded in the investigation. The sheet materials used in the experiments are aluminium, cold rolledsteel, high strength steel and advanced high strength steel. The process parameters for this study weredie corner radius and blank holder force. Workpiece materials were prepared with a circular shapeand with a diameter of 80 millimetres. In the center of the circular workpiece, a 12-millimetrediameter hole was drilled to observe the formability of each of the materials. The advantage of usingan initial blank with a hole in the center by the cylindrical cup drawing test is that the cup does notfail from changes of the thickness of material near the punch radius at the bottom of the cup. Thelimiting cup height of the investigated materials were evaluated by test using the cylindrical cup withhole. The results show that the limiting cup height values have a relationship to the limiting drawingratio values of the investigated materials. Testing using cylindrical cup with hole by evaluating thelimiting cup height value is feasible for comparing the formability of sheet metals.

Effect of Variable Geometry on Springback of High Strength Steel Materials

2015 ◽  
Vol 1134 ◽  
pp. 154-159
Author(s):  
Muhamad Sani Buang ◽  
Shahrul Azam Abdullah ◽  
Juri Saedon ◽  
Yupiter H.P. Manurung ◽  
Mohd Shahir Mohd Hairuni ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
High Strength Steel ◽  
High Strength ◽  
Bending Test ◽  
Geometrical Parameters ◽  
Forming Process ◽  
Element Simulation ◽  
Punch Radius ◽  
Prevention Method

Springback is the phenomenon in which the material strip unbends itself after forming process. It is caused by the geometrical, mechanical properties or other process parameters. This paper focused on finite element simulation investigation on effects of geometrical parameters on the springback amount of the High Strength Steel (HSS). Two geometrical parameters, punch radius (Rp) and die opening (Wo) were selected and their effect on springback studied. Finite element simulation of U-bending test was performed using Simufact.formingTM with material database (MatILDa) and the level of the springback was measured. The result of the simulation shows that different values of punch radius (Rp) and die opening (Wo) are significant to the springback effect. 3 variable values of (Rp) and (Wo) selected in this studied are (2mm, 4mm, 6mm) and (30mm, 36mm, 48mm) respectively. The findings of the simulation could be used to accurately and reliably predict springback behavior of the tested material. The value of the springback increases, as the value of the die opening (Wo) increases. Meanwhile, the increasing value of the punch radius (Rp) will lead to decreasing springback value. From this finding, a proper prevention method can be taken to eliminate springback, achieve improvement in the forming process as well as reduce processing time and cost.

Simulation of Die Gap Variation in Temperature Field Distribution of High Strength Steel Hot Stamping Process

2013 ◽  
Vol 652-654 ◽  
pp. 2048-2052 ◽  
Author(s):  
Shu Lai Chen ◽  
Yu Jun Cai ◽  
Guo He Li ◽  
Zhi Gang Liu
Keyword(s):  
Temperature Field ◽  
Field Distribution ◽  
High Strength Steel ◽  
Thickness Distribution ◽  
Hot Stamping ◽  
High Strength ◽  
Cooling Efficiency ◽  
Temperature Field Distribution ◽  
Simulation Accuracy ◽  
Stamping Process

In the hot stamping process, die gap may affect cooling efficiency of the die and the condition of stress-strain. When other conditions are same, die gap were taken for 0.9t, t, 1.1 t, 1.2 t, t is sheetthickness. Temperature field and thickness distribution of the parts are simulated by ANSYS/LS-DYNA module, it is discovered that the distribution of temperature and thickness is uniform when the die gap is 1t and 1.1t. Finally, an experimental is designed to verify the simulation accuracy.

scholarly journals Study on forming process and spring back control of high strength sheet based on Dynaform

2018 ◽  
Vol 232 ◽  
pp. 02039
Author(s):  
cunping Liu
Keyword(s):  
Velocity Profile ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Part ◽  
Drawing Process ◽  
Spring Back ◽  
Blank Holder Force ◽  
Forming Process ◽  
Blank Holder ◽  
Motion Mode

The drawing process of a high strength steel part without blank holder force was numerically simulated based on Dynaform. In present investigation, the drawing velocity and velocity profile motion of punch was studied by simulating the drawing operation of high strength steel part. The results show that restricting drawing velocity and controlling velocity profile motion of punch could all reduce the spring back. The measure of restricting drawing velocity could reduce non-pressure forming spring back about 31% and Trapezoidal motion mode of punch is the most beneficial to reduce spring back.

Dynamic Analysis of 3D Roll Forming Equipment in Mechanical System

2013 ◽  
Vol 740 ◽  
pp. 323-331 ◽  
Author(s):  
Zhen Feng Yang ◽  
Qiang Li ◽  
Yan Zhi Guan
Keyword(s):  
Differential Equations ◽  
High Strength Steel ◽  
Dynamic Balance ◽  
Three Dimensional ◽  
Mechanical Systems ◽  
High Strength ◽  
Roll Forming ◽  
System Response ◽  
Forming Process ◽  
Element Simulation

In this paper, the high-strength steel three-dimensional roll forming production line prototype is studied. The dynamic differential equations of 3D roll forming machine mechanical systems are established by the principle of dynamic balance. The dynamic differential equations are solved out by using MATLAB with the engineering example finite element simulation data. The dynamic characteristics of the forming process of 1.5mm TRIP590 high-strength steel sheet are obtained by the System response. The results can help to improve the performance of the prototype mechanical systems.

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