Dynamics Analyses of Rigid-Flexible Coupling of Spot-Welding Robot

2020 ◽  
Vol 19 (04) ◽  
pp. 855-867
Author(s):  
Xiangru Wang ◽  
Wei Song ◽  
Tao Xue ◽  
He Tian
Keyword(s):  
Industrial Production ◽  
Spot Welding ◽  
Maximum Stress ◽  
Three Dimensional ◽  
Welding Robot ◽  
Three Dimensional Model ◽  
Production Lines ◽  
Flexible Coupling ◽  
Simulation Functions ◽  
Dynamics Analyses

With the development of electronics, mechanical automation, computer and other related disciplines, and the improvement of product efficiency and quality in modern industry, welding robots are born and play an increasingly important role in industrial production lines. 6R welding robot is most commonly used in industrial production lines, so the research on 6R welding robot has practical application values. In this paper, MS165 Yaskawa robot is selected as the target robot. SolidWorks software is used to establish the three-dimensional model of Yaskawa robot, which is imported into Adams. Dynamics analyses of the rigid–flexible coupling system of 6R spot welding robot are studied by powerful dynamic simulation functions of Adams. The maximum stress position of the spot-welding robot working under load is also studied, and the maximum stress curve is obtained.

scholarly journals Modular hemipelvic endoprosthesis with a sacral hook: a finite element study

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Bo Wang ◽  
Peidong Sun ◽  
Hao Yao ◽  
Jian Tu ◽  
Xianbiao Xie ◽  
...  
Keyword(s):  
Aseptic Loosening ◽  
Maximum Stress ◽  
Three Dimensional ◽  
Biomechanical Properties ◽  
Stress Distributions ◽  
Three Dimensional Model ◽  
Connection Component ◽  
Static Conditions ◽  
Distribution Of Stress

Abstract Background A novel hemipelvic endoprosthesis with a sacral hook was introduced previously, and its clinical outcome with midterm follow-up showed decreased prosthesis-related complications, especially decreased rate of aseptic loosening. The aim of present study was to evaluate the role of a sacral hook in prosthesis stability and the biomechanical properties of this hemipelvic endoprosthesis. Methods A three-dimensional model of the postoperative pelvis was developed using computed tomography (CT) images. A force of 500 N was applied, and the distribution of stress and displacement was evaluated. Comparisons were performed to explore the role of the sacral hook in prosthesis stability. Prosthesis improvement was simulated to reduce unexpected breakage of the pubic connection plate. Results In the reconstructed hemipelvis, stress distributions were concentrated on the superior area of the acetabulum, sacral connection component, and sacral hook. A maximum stress of 250 MPa was observed at the root of the sacral connection component. The sacral hook reduced the maximum stress and displacement by 14.1% and 32.5%, respectively, when the prosthesis was well fixed and by 10.0% and 42.1%, respectively, when aseptic loosening occurred. Increasing the thickness of the pubic connection plate from 2 to 3.5 mm reduced the maximum stress by 32.0% and 15.8%, respectively. Conclusion A hemipelvic endoprosthesis with a sacral hook fulfills the biomechanical demands of the hemipelvis and is safe under static conditions. The sacral hook is important for prosthesis stability. Increasing the thickness of the pubic connection plate can reduce the maximum stress and risk of fatigue breakage.

Study on the Application of Computer Three-Dimensional Model's Simulation Functions

2013 ◽  
Vol 443 ◽  
pp. 27-30
Author(s):  
Qin Gu
Keyword(s):  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Simulation Functions ◽  
Dimensional Models ◽  
Three Dimensional Models

In this paper, the simulation functions of computer three-dimensional model as well as the advantages in the simulated application are briefly introduced, and also the application of the three-dimensional models simulation functions to the different industries is discussed in details.

Finite Element Analysis of 2450 Type Close-Top Mill Housing

2012 ◽  
Vol 601 ◽  
pp. 173-176
Author(s):  
Xi Wang ◽  
Chang Liang Xu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Stress Contour ◽  
Maximal Displacement

Aimed at the maximum stress and distortion, the three-dimensional model of 2450 type close-top mill housing was simulated by finite element analysis, with the help of FEM software (ANSYS). The positions of dangerous sections and the maximum stress was shown in stress contour. The displacement and maximal displacement of various points was obtained in the deformation contour. The results show that different structural parameters was used for the key parts, and the influence of parameters to stress and deformations can be obtained, which can provide reference for the design of the related mill housing.

Analysis of a Missile's Initial Disturbance

2014 ◽  
Vol 889-890 ◽  
pp. 152-155 ◽  
Author(s):  
Xin Lin Wei ◽  
Yi Jiang
Keyword(s):  
Working Conditions ◽  
Complex Structure ◽  
Three Dimensional ◽  
Coupling Model ◽  
Dynamics Simulation ◽  
Dynamics Model ◽  
Three Dimensional Model ◽  
Flexible Coupling ◽  
Coupling System ◽  
Systems Simulation

In this paper, a certain type of vehicle missile launching system is the research object, which uses CAE technology to make a flexible coupling system dynamics simulation and analysis to provide a reference for similar tests. Since the complex structure of the vehicle missile system, reasonable assumptions and simplifications are made in establishing the dynamics model. Pro/E is used to build the three-dimensional model, and then it is imported to the ABAQUS to establish its dynamics model. Finally, in a complete virtual prototyping system model, we make a simulation of working conditions, and draw conclusions and analysis. The results show that the use of independent dynamics rigid-flexible coupling model dynamics simulation based on ABAQUS can be more realistic simulation of the process of vehicle missile launch, and it verifies the results of different working conditions, which provides a reference for the vehicle missile launching systems simulation .

Dynamic Simulation and Control Strategy of Centrifugal Flying Shear

2009 ◽  
Vol 16-19 ◽  
pp. 278-282
Author(s):  
Jin Chun Song ◽  
Chang Zhou Wang ◽  
Dong Xu
Keyword(s):  
Dynamic Simulation ◽  
Control Strategy ◽  
Optimization Design ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Production Lines ◽  
Electronic Control System ◽  
Working Principle ◽  
Parameter Optimization Design ◽  
And Control

Centrifugal Flying Shear is one of the most advanced equipments, which is widely used in tandem mill production lines because of its simple structure and high shearing precision. In this paper, the working principle of the centrifugal flying shear was introduced; the three-dimensional model of the centrifugal flying shear was established; the structural analysis and the dynamic simulation of the flying shear, with the movement rule and trajectory, were made based on MATLAB/SimMechanics and Solidworks/COSMOS Motion; and the control strategy of realizing scale shearing was proposed. The results obtained provide theoretical basis for design of the electronic control system, and facilitate further analysis of the shearing process and parameter optimization design of similar flying shears.

Rigid–flexible coupling dynamics with contact estimator for robot/PTL system

2020 ◽  
Vol 234 (4) ◽  
pp. 635-649
Author(s):  
Xiaoliang Zheng ◽  
Gongping Wu ◽  
Wei Jiang ◽  
Fei Fan ◽  
Jiale Zhu
Keyword(s):  
Power Transmission ◽  
Screw Theory ◽  
Three Dimensional ◽  
Nonlinear Dynamic Analysis ◽  
Rigid Bodies ◽  
Operating Conditions ◽  
Three Dimensional Model ◽  
Flexible Coupling ◽  
Coupling Approach ◽  
Coupling Dynamics

In order to enhance sampling efficiency and security when robot maintains power transmission line (PTL), this article develops a new approach for the rigid-flexible coupling dynamics of robot/PTL system, which decouples the large system into two small systems and solves them separately by estimating the contact force. The robot is modelled as a system of rigid bodies by screw theory, while the PTL system is modelled using absolute node coordinate formulation (ANCF). The integration of screw theory, ANCF and contact estimator trained by artificial neural network has not been accomplished before in the literature. The main contribution of this paper is to achieve this integration with the goal of developing a new and general approach for the nonlinear dynamic analysis of the interaction of the rigid maintenance robot with flexible PTL cable. A simplified two-dimensional example is used to compute the effect of the robot/PTL interaction under different operating conditions to have an understanding of the coupling approach between the two systems. A more detailed three-dimensional model was developed, and the results obtained validate the utility and effectiveness of our approach.

Finite Element Modeling and Strength Analysis of Boom System of Concrete Pump Truck

2013 ◽  
Vol 457-458 ◽  
pp. 490-493
Author(s):  
Hong Bin Tang ◽  
Wu Ren ◽  
Shui Wang
Keyword(s):  
Maximum Stress ◽  
Three Dimensional ◽  
Strength Analysis ◽  
Yield Limit ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
National Economic ◽  
National Economic Development ◽  
Concrete Pump Truck ◽  
Concrete Pump

Concrete pump truck plays an important role in national economic development and infrastructure construction. The boom system is one of the most critical parts of concrete pump truck, so it is important to analysis the strength. In this paper, the research is on the concrete pump truck of 37 meters. The three-dimensional model is established in PRO/E. Then the model is imported to MSC.PATRAN / NASTRAN and the strength is analyzed. The results show that the maximum stress on the boom is far less than the yield limit of the material, the structure meet the strength requirements.

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