Numerical Simulation and Experiment of Self-Piercing Riveting with Solid Rivet Joining Multi-Layer Aluminum Sheets

2009 ◽  
Vol 628-629 ◽  
pp. 641-646 ◽  
Author(s):  
Zhi Chao Huang ◽  
Qiu Hua Yao ◽  
Ning Jiang ◽  
Ze Jie Zhou
Keyword(s):  
Numerical Simulation ◽  
Transition Point ◽  
Maximum Stress ◽  
Sheet Thickness ◽  
The Self ◽  
Forming Process ◽  
Aluminum Sheets ◽  
Simulation And Experiment ◽  
Distribution Of Stress

Numerical simulation and experiment of self-piercing riveting with solid rivet joining multi-layer aluminum sheets are carried out in this paper. The forming process of the riveting and the distribution of stress are analyzed, the results show that the simulation is consistent with the experiment. The results of experiment prove that the transition point of the cone-shaped head of the solid rivet, the size and position of groove affect directly the quality of riveting. The fillet at the transition point of the cone-shaped head of the solid rivet can decline the maximum stress of the rivet. When the distance between the center of groove and bottom of rivet is about three quarters of the bottom sheet thickness, the bottom sheet of self-piercing does not fall off. The self-piercing riveting with solid rivet joining multi-layer aluminum sheets is feasible.

Investigation on Hole Punching Process with Combined Punch to Improve Surface Quality during the Materials Forming Process

2017 ◽  
Vol 737 ◽  
pp. 77-82
Author(s):  
Pan Pan Yao ◽  
Qiang Wang
Keyword(s):  
Numerical Simulation ◽  
Surface Quality ◽  
Hydraulic Press ◽  
Simulation Software ◽  
The Self ◽  
Improve Quality ◽  
Forming Process ◽  
Medium Thickness ◽  
Punching Process

The present work shows the viability of a combined punch that makes possible to perform a hole punching followed by a hole burnishing in only one operation. The advantage of this combined punch is forming processes in only one process on medium thickness plate. In this work were tested two different configurations of punches which one of them is the conventional punch and another is a new structure of combined punch. The new structure of combined punch is added the step and inclined edge at the cutting edge on the basis of conventional punch. They are made of the same materials that are Cr12MoV. The new structure of combined punch and the conventional punch are studied by using numerical simulation and experimental research in this paper. During the materials forming process of hole punching, the simulation software ANSYS is used to simulate. The YZ32-100 Hydraulic press with nominal and the self-made die sets and the thick of 16mm Q235 sheet metal is selected in this experiment. The analysis of the obtained results showed that the hole surface quality of combined punch is superior to the conventional punch. It is prove that the new structure of combined punch can improve quality of punching.

Vacuum Forming Refrigerator Inner Liner Structural Optimization

2011 ◽  
Vol 291-294 ◽  
pp. 1069-1073
Author(s):  
Wen Bin Su ◽  
Xiang Bing Sun ◽  
Tao Li ◽  
Bao Jian Liu
Keyword(s):  
Numerical Simulation ◽  
Structural Optimization ◽  
Structural Parameters ◽  
Forming Process ◽  
Significance Level ◽  
Orthogonal Experiments ◽  
Combination Scheme ◽  
Vacuum Forming ◽  
Validation Experiment

Thickness thinning is the principal quality problem in the vacuum forming process of the refrigerator inner liner. In this paper, the structural parameters of refrigerator inner liner were analyzed based on orthogonal experiments and numerical simulation. Optimized structural parameters combination scheme and the significance level of structural parameters to thickness were obtained by analyzing the results of orthogonal experiments. Validation experiment results shown that the quality of refrigerator inner liner based on the optimized structural parameters combination scheme improved effectively.

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.

Numerical Simulation of Forming Process for Cover with Stiffening Components Made of Grade 2 Titanium Sheet Metal

2016 ◽  
Vol 687 ◽  
pp. 206-211
Author(s):  
Wojciech Więckowski
Keyword(s):  
Numerical Simulation ◽  
Sheet Metal ◽  
Empirical Studies ◽  
Strength Properties ◽  
Forming Process ◽  
Titanium Sheet ◽  
Plastic Properties ◽  
Fem Method

This study presents the findings of numerical simulations of forming process for an inspection hole cover with stiffening ribs made of thin grade 2 titanium sheet metal. The numerical simulation was carried out using the FEM method with PAMStamp 2G software. Numerical calculations were performed with consideration for the phenomenon of material strain hardening and anisotropy of plastic properties of the sheet metal formed. Properties of the grade 2 titanium alloy analysed in the simulations were adopted based on the results of the empirical studies. Adequate parameters of the forming process were selected in order to eliminate unfavourable phenomena of losing of material coherence and sheet metal wrinkling. The effect of conditions of friction between the sheet metal and tool and pressure force of the blank holder on the forming process was investigated. The analysis of the distribution of plastic strain and reduction in wall thickness of the drawn parts can be used for determination of the effect of changes in selected parameters and orientation of the specimen on the process of drawn part forming. The quality of drawn parts was assessed based on the shape inaccuracy determined during simulation of forming. The inaccuracy depended on the conditions of the process and strength properties of the titanium sheet metal.

Research on Stamping Forming and Spring-Back of Automotive Panel

2010 ◽  
Vol 160-162 ◽  
pp. 446-449
Author(s):  
Xiu Long Chen ◽  
Huai Bo Shan ◽  
Xi Hua Liu ◽  
Gui Lian Wang
Keyword(s):  
Process Simulation ◽  
Maximum Stress ◽  
Sheet Thickness ◽  
Solid Model ◽  
Spring Back ◽  
Forming Process ◽  
Minimum Thickness ◽  
Stamping Process ◽  
Automotive Panel ◽  
Back Problem

In order to solve spring-back problem of the stamping forming process, A method for stamping forming and spring-back process simulation of automotive panel by finite element technologies was proposed. The solid model of automobile right side strengthening panel was created in UG software and transmitted to Dynaform. The stamping forming and spring-back process simulation were realized by using Dynaform. The distribution of strain, the variety of the sheet thickness and the spring-back were analyzed. The maximum stress or strain, the minimum thickness and the maximum spring-back were obtained. The simulation results can reflect the real stamping forming of the strengthening panel, and forecast the possibly spring-back value in stamping process. This research can optimize the stamping process and provide strong references for the design of the automotive panel die.

Mechanical Model’s of Conical Valve’s Spool-Seat Contact Pairs Based on the Hertz Theory

2011 ◽  
Vol 130-134 ◽  
pp. 1770-1774
Author(s):  
Hai Bing Jiang ◽  
Jian Ruan ◽  
Hui Min Xu ◽  
Tao Wang
Keyword(s):  
Numerical Simulation ◽  
Contact Line ◽  
Maximum Stress ◽  
Curvature Radius ◽  
Allowable Stress ◽  
Hertz Theory ◽  
Sealing Performance ◽  
Simulation And Experiment ◽  
Valve Sealing ◽  
Circular Contact

Conical valve’s spool-seat contact pairs is consisted of two surfaces of different curvature radius, and form closed circular contact line. It can be considered as the model of elastic hemi-space contact by the Hertz Theory. The numerical simulation and experiment show: The model is suitable for the analysis of conical valve’s spool-seat contact pairs. The conical valve’ sealing performance is very credible and its performance is very good. Maximum stress is smaller than allowable stress of the seat’s material. The consistency of experiment and simulation proves the validity and practicability of the hemi-space contact model of the valve’s spool-seat contact pairs.

Heat-Stress Fields Numerical Simulation of Aluminum Profile Extrusion by Porthole Die

2008 ◽  
Vol 575-578 ◽  
pp. 495-501
Author(s):  
Zhang Jian ◽  
Yun Tao Li ◽  
Liang Chu ◽  
Da Sen Bi ◽  
Hong Xiang Cui
Keyword(s):  
Numerical Simulation ◽  
Heat Stress ◽  
Stress Fields ◽  
Gear Pump ◽  
Forming Process ◽  
Geometry Model ◽  
Porthole Die ◽  
Solid Geometry ◽  
Aluminum Profile Extrusion

A solid geometry model of porthole die is built up by CAD . Pointing to some problems in the extruding process, such as the die fraying and the low quality of the welding during the extruding process, and the interrelated parameters, the main forming process of 7005 aluminum alloy gear pump by porthole die is simulated by using numerical analysis software DEFORM-3D with regard to heat-stress fields. Based on the results of numerical simulation, this paper gives some improvements and suggestions for optimizing the forming process.

Research on Stamping of Aluminum Alloy Hemispherical Components Based on Numerical Simulation and Experiments

2010 ◽  
Vol 97-101 ◽  
pp. 236-239
Author(s):  
Cheng Jun Han ◽  
Xin Bo Lin ◽  
Yan Bo Li
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Product Quality ◽  
Experimental Research ◽  
Simulation Software ◽  
Blank Holder Force ◽  
Forming Process ◽  
Blank Holder ◽  
Wrought Aluminum

Experimental research on stamping of wrought aluminum alloy has been an important issue at home and abroad. In this paper, taking stamping of aluminum alloy hemispherical components for example, the effects of blank holder force (BHF) on stamping forming process of aluminum alloy are explored by methods of experiments and numerical simulation. Through experiments, the forming laws of hemispherical components are found out. The research shows that the BHF has significant effects on the quality of stamping components and reasonable BHF can greatly improve the formability of hemispherical components. Additionally, by applying simulation software in stamping, the development circle of product and its moulds can be shortened, and product quality and its competitiveness in the market can be improved.

scholarly journals Two-Roller Continuous Calibration Process by Compression for Submarine Pipelines

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1224
Author(s):  
Deping Peng ◽  
Zhongwang Gong ◽  
Shumin Zhang ◽  
Gaochao Yu
Keyword(s):  
Numerical Simulation ◽  
Deep Sea ◽  
Oil And Gas ◽  
Reduction Ratio ◽  
Shape Design ◽  
Stress And Strain ◽  
Physical Experiments ◽  
Simulation And Experiment ◽  
Initial Placement ◽  
Distribution Of Stress

Submarine pipeline is a key part in the development of deep sea and ultra-deep sea oil and gas. In order to reduce the ovality of pipes and improve their compressive strength, a two-roller continuous calibration (TRCC) process by compression is proposed. A springback analysis of compress bending is carried out, and an analytical model is established, which predicts ovality after calibration and provides a theoretical basis for roller shape design and process parameter formulation. Numerical simulation and physical experiments are carried out. The distribution of stress and strain is analyzed. The effects of initial ovality, reduction ratio and initial placement angle on the ovality after calibration are studied. When the reduction ratio is about 1%, the ovality is optimal. The theoretical analysis shows that the ovality after calibration is about 0.03%, and the ovality after calibration by numerical simulation and experiment is less than 0.45%, proving the feasibility of the process.

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