Yan Fang Ding

Finite Element Analysis of Energy Saving Jointing Method Base on Energy Materials: Clinching

The clinch joining technique can be used to join energy saving materials based on a cost effective, environmentally friendly process. In this paper, the mechanical joining method by clinching with segmented die is analyzed utilizing a finite element method. A comparison is conducted about the principle of forming process and the metal flowing direction for two different types of die, drawing conclusions that a better interlocking length can be obtained using segmented die. Analyzing the quality parameter of the clinching results, finds the reason why the segmented die can get a better neck thickness and undercut. Meanwhile, the results of clinching with segmented die also show a good agreement with experimental results.

Numerical Simulation of Clinching Process in Copper Alloy Sheets

The clinch joining is a new technique to join light alloy materials. This paper studies the process of clinching in joining Copper alloy sheets based on the method of numerical simulation combined with experiment. The studies are performed by employing software ansys/ls-dyna considering with the contact conditions and material models in the model. Efficient analytic results of forming of clinching in Copper alloy sheets are provided. The experiments of clinched joints in Copper alloy sheets are carried out to validate the simulation. It is shown that the simulation of process of clinching joints in Copper alloy sheet has a good agreement with the experimental result. That suggests the developed finite element model, considering the contact conditions of materials and the material models can be used to predict the joint forming of Copper alloy by clinching ideally.

Numerical Simulation and Online Window Monitoring of SPR Process

The need to create lighter vehicles to aid in reducing emissions and increase fuel efficiency has become increasingly important in recent years. Self-pierce riveting (SPR) has drawn more attention as it can join some advanced materials that are dissimilar and hard to weld. In present study, the SPR process has been numerically simulated using the commercial finite element (FE) software LS-Dyna. For validating the numerical simulation of the SPR process, experimental tests on specimens made of aluminium alloy have been carried out. The online window monitoring technique was used in the tests for evaluating the quality of SPR joints. Good agreements between the simulations and the tests have been found, both with respect to the force-travel curves as well as the deformed shape on the cross-section of SPR joint.

Study on Assembly Design Approach Based on Synchronous Modeling Technology

With the increase demand for product diversity, the best way is to shorten design cycle of product and improve design efficiency. This paper presents an assembly design method of product by means of the use of Solid Edge ST4 3D synchronous modeling technology. In this paper, an industrial manipulator was studied as an example, which was used to account for the design process of assembly design based on synchronous technology and the characteristic of this design method. In the process of design, intelligent assembly technology, top-down assembly technology and synchronous assembly technology are combined with the design of industrial manipulator. The results show that this assembly design method is more convenience to modify design model, can greatly improve design efficiency and accuracy and reduce the iterative design process of similar model, thus greatly improve the product quality.

Study on the Standardized Design of Belt Conveyor Based on Synchronous Technology

Belt conveyor is widely used in all kinds of automatic production line and bulk material delivery is its important applications. In order to improve the operation accuracy of the belt conveyor, in addition to strictly control the production process, tracking the manufacturing process, the most important thing is to improve the design level and design efficiency. The research used Solid Edge ST4 three-dimensional synchronous modeling technology to complete 3 d model design of belt conveyer, at the same time for the standardization of belt conveyor design research. Standardized design uses synchronous modeling, modular design technology, top-down assembly modeling technology complete standardization process from scheme design to detail design. According to the structure characteristics of belt conveyor, the integral reasonable structure is divided into several modules, modules are related by key parameters. When you modify the parameters related to realize the automatic modification of model of the structure, the standardization of product design is promoted. Research focuses on synchronous modeling technology in three dimensional modeling design and application of a belt conveyor design standardization implementation, validating the fusion of synchronous modeling technology in different design module. Through the module assembly process, within the scope of certain and realize module exchange, so as to realize the belt conveyor series, universal design. To realize the standardization of structure design can reduce repeated design and design errors, thus greatly improve the engineer design efficiency.

Strength and Energy Absorption of Self-Piercing Riveted Joints

With increasing application of self-piercing riveting (SPR) in different industrial fields, the demand for a better understanding of the knowledge of strength and energy absorption characteristics of the SPR joints is required. It is also important for SPR to benefit from the advantages of adhesively bonding. It is commonly understood that the addition of adhesive in SPR joints is beneficial but it is not clear if there are negative effects on mechanical properties of SPR joints. In present study, deformation and failure of homogeneous joints under monotonic tensile loading were studied for validating the strength and energy absorption of SPR and SPR-bonded hybrid joints.

System Reliability Analysis for a Conveying Pipeline with GO Methodology

The process of system reliability analysis for a conveying system with GO methodology was presented. The reliability criterion for a parallel conveying system was defined, regarding to its specific structure and function. Some new GO operators were defined and their algorithms were derived, considering system reparability. The system GO chart was established based on system diagram. Some important reliability parameters for steady system, such as availability and MTBF can be directly calculated with the GO calculation. The result shows that the proposed process is effective for the reliability analysis of this type conveying system and can provide a theoretical basis for the program decision and repairable system optimum design.

Kinematics Analysis of a 6-DOF Riveting Manipulator Based on ADAMS

In this paper, a 6-DOF riveting manipulators kinematics model was built by D-H method, and its kinematics problems were discussed. Each of the kinematics parameters was gotten by solving the direct and inverse kinematics functions in Matlab. Then the virtual prototype model of the riveting manipulator was built by ADAMS, and the position, velocity and acceleration in the end center of the riveting manipulator were gotten by the simulation analysis. The reasonability of each linkage design parameters and kinematics model could be verified by simulation results in ADAMS, a foundation could be laid for the further dynamics research.

Free Vibration Measurements of Single-Lap Cantilevered SPR Beams

Self-pierce riveting (SPR) is a new high-speed mechanical fastening technique which is suitable for point joining dissimilar materials, as well as coated and pre-painted materials. In this study, an experimental measurement technique was provided for the prediction of the free vibration behavior of single-lap cantilevered SPR beams. The dynamic test software and the data acquisition hardware were used in the experimental measurement of the dynamic response of the single-lap cantilevered SPR Beams. The frequency response functions of the SPR beams of different rivet number were measured and compared. The main goal of the paper is to provide a basis for further research on vibration based non-destructive damage detection in single-lap cantilevered SPR beams.

Research on Vibration Characteristic of Tamping Device Based on SIMULINK

The requirements of higher speed, safety and more smooth and comfortable travelling are increasing strongly, this leads to the need of predictive maintenance of railway line, tamping machines have been used for this purpose. This paper presents the results of vibration characteristic of tamping device. Firstly, the basic working principle of tamping device was simply described; Then a simulation model of tamping device was established using SIMULINK in terms of mechanism principle; Finally, some vibration parameters were researched, such as velocity, acceleration, displacement of tamping device, which reflect the vibration characteristic of tamping device. In addition, the modeling process of simulation model was described, the function of SIMULINK was also simply recommended. The main aim of this paper is to propose an analysis method on facility vibration characteristic, which visualized reflects the kinematics characteristic of mechanism. The results show that the application of the technology can make the simulation process more visualization. The modeling process more simply, thus greatly improve modeling and simulation efficiency, and directly achieve our aims.