Method of Spray Gun Path Generation Based on Z-Map Theory

2012 ◽  
Vol 157-158 ◽  
pp. 558-562 ◽  
Author(s):  
Zhan Zhong Wang ◽  
Chao Ying Liu ◽  
Lin Zhang Cheng ◽  
Xiao Ke Fan
Keyword(s):  
Free Surface ◽  
3D Model ◽  
Cad Model ◽  
Matlab Program ◽  
Painting Robot ◽  
Normal Vectors ◽  
Model Setup ◽  
Shape Complexity ◽  
Spray Gun ◽  
Polyhedron Model

As an advanced painting equipment, the spray-painting robot has been widely used in product painting. For the shape complexity of modern product, how to make the coating uniform has become an extremely important problem. In this paper, based on Z-map theory and the free surface’s CAD model, the free surface is fragmented into polyhedron model, and then the coordinate information and normal vectors of the painting node under the condition of equidistance painting are exacted with MATLAB program. At the end, with those coordinate information & normal vectors, the spray gun path for a random free surface could be generated and simulated automatically. Finally, based on the 3D model setup with Pro/E software, the spray gun path for a car body’s top area is generated and simulated.

Trajectory Generation of Spray Painting Robot Using Point Cloud Slicing

2010 ◽  
Vol 44-47 ◽  
pp. 1290-1294 ◽  
Author(s):  
Ming Zhu Li ◽  
Zhang Ping Lu ◽  
Chun Fa Sha ◽  
Li Qing Huang
Keyword(s):  
Point Cloud ◽  
Planning Process ◽  
Cloud Model ◽  
Trajectory Generation ◽  
Spray Painting ◽  
Cloud Data ◽  
Sampling Points ◽  
Painting Robot ◽  
Normal Vectors ◽  
Spray Gun

In the trajectory planning process of spray painting robot, an approach to automatic trajectory generation of spray gun using point cloud slicing is presented. Firstly, the point cloud data is obtained by scanning the surface of the workpiece. After the uniform slicing of point cloud model, the spraying position is determined by the average sampling of cross-section contours. Then the normal vectors of the sampling points are estimated. Finally the trajectory of spray gun is generated by offsetting the sampling points along their normal vectors. Experimental results show that the method has good feasibility and effectiveness. The spraying trajectory, direction and distance of spray gun can be controlled accurately, thus the spraying quality and efficiency are improved.

A Novel Data Hiding Algorithm Using Normal Vectors of 3D Model

2006 ◽  
pp. 231-241
Author(s):  
Chung-Hsien Chang ◽  
Chung-Ming Wang ◽  
Yuan-Yu Tsai ◽  
Yu-Ming Cheng
Keyword(s):  
Data Hiding ◽  
3D Model ◽  
Normal Vectors

scholarly journals Dam-Break Flows: Comparison between Flow-3D, MIKE 3 FM, and Analytical Solutions with Experimental Data

2018 ◽  
Vol 8 (12) ◽  
pp. 2456 ◽  
Author(s):  
Hui Hu ◽  
Jianfeng Zhang ◽  
Tao Li
Keyword(s):  
Experimental Data ◽  
Free Surface ◽  
Analytical Solution ◽  
Water Depth ◽  
3D Model ◽  
Real Life ◽  
Surface Profile ◽  
Dam Break ◽  
Computational Time ◽  
Free Surface Profile

The objective of this study was to evaluate the applicability of a flow model with different numbers of spatial dimensions in a hydraulic features solution, with parameters such a free surface profile, water depth variations, and averaged velocity evolution in a dam-break under dry and wet bed conditions with different tailwater depths. Two similar three-dimensional (3D) hydrodynamic models (Flow-3D and MIKE 3 FM) were studied in a dam-break simulation by performing a comparison with published experimental data and the one-dimensional (1D) analytical solution. The results indicate that the Flow-3D model better captures the free surface profile of wavefronts for dry and wet beds than other methods. The MIKE 3 FM model also replicated the free surface profiles well, but it underestimated them during the initial stage under wet-bed conditions. However, it provided a better approach to the measurements over time. Measured and simulated water depth variations and velocity variations demonstrate that both of the 3D models predict the dam-break flow with a reasonable estimation and a root mean square error (RMSE) lower than 0.04, while the MIKE 3 FM had a small memory footprint and the computational time of this model was 24 times faster than that of the Flow-3D. Therefore, the MIKE 3 FM model is recommended for computations involving real-life dam-break problems in large domains, leaving the Flow-3D model for fine calculations in which knowledge of the 3D flow structure is required. The 1D analytical solution was only effective for the dam-break wave propagations along the initially dry bed, and its applicability was fairly limited.

Development of CAD Model Annotation System Based on Design Intent

2017 ◽  
Vol 863 ◽  
pp. 368-372
Author(s):  
Qin Yi Ma ◽  
Li Hua Song ◽  
Da Peng Xie ◽  
Mao Jun Zhou
Keyword(s):  
Product Design ◽  
3D Model ◽  
Adaptive Design ◽  
Design Knowledge ◽  
Cad Model ◽  
Design Intent ◽  
Design Information ◽  
Annotation System ◽  
Modeling Analysis ◽  
Model Annotation

Most of the product design on the market is variant design or adaptive design, which need to reuse existing product design knowledge. A key aspect of reusing existing CAD model is correctly define and understand the design intents behind of existing CAD model, and this paper introduces a CAD model annotation system based on design intent. Design intents contained all design information of entire life cycle from modeling, analysis to manufacturing are marked onto the CAD model using PMI module in UG to improve the readability of the CAD model. Second, given the problems such as management difficulties, no filter and retrieval functions, this paper proposes an annotation manager system based on UG redevelopment by filtration, retrieval, grouping and other functions to reduce clutter on the 3D annotations and be convenient for users to view needed all kinds of annotations. Finally, design information is represented both internally within the 3D model and externally on a XML file.

scholarly journals SIMULATION MODELING OF MOVEMENT OF INDUSTRIAL ROBOT MANIPULATOR IN THE MATLAB PROGRAM

2021 ◽  
Vol 3 (1) ◽  
pp. 17-20
Author(s):  
Kostyantyn Kolesnyk ◽  
Keyword(s):  
Simulation Modeling ◽  
3D Model ◽  
Robot Manipulator ◽  
Industrial Robot ◽  
Information Support ◽  
Graphical Interface ◽  
Matlab Program

In the work the information support for carrying out of simulation modeling of the industrial robot manipulator in the Matlab program is developed. The structure of the program for research of kinematics of industrial robot is developed. A graphical interface using the Matlab GUI has been developed for simulation of an industrial robot. The Denova-Hartenberg parameters for modeling the motion of an industrial robot are derived from the 3D model of the ABB IRB 2400 robot manipulator.

Trajectory planning method based on transitional segment optimization of spray painting robot on complex-free surface

2019 ◽  
Vol 46 (1) ◽  
pp. 31-43 ◽  
Author(s):  
Liwen Guan ◽  
Lu Chen
Keyword(s):  
Free Surface ◽  
Trajectory Planning ◽  
Trajectory Optimization ◽  
Trajectory Generation ◽  
Distribution Model ◽  
Optimization Approach ◽  
Spray Painting ◽  
Content Type ◽  
Normal Vectors ◽  
Paint Thickness

Purpose This paper aims to present a new trajectory optimization approach targeting spray painting applications that satisfies the paint thickness requirements of complex-free surfaces. Design/methodology/approach In this paper, a new trajectory generation approach is developed to optimize the transitional segments at the junction of adjacent patches for straight line, convex arc and concave arc combinations based on different angles between normal vectors of patches. In addition, the paint parameters including the paint gun velocity, spray height and the distance between adjacent trajectories have been determined in the generation approach. Then a thickness distribution model is established to simulate the effectiveness of trajectory planning. Findings The developed approach was applied to a complex-free surface of various curvatures, and the analysis results of the trajectory optimization show that adopting different transitional segment according to the angle between normal vectors can obtain the optimal trajectory. Based on the simulation and experimental validation results, the proposed approach is effective at improving paint thickness uniformity, and the obtained results are consistent with the simulation results, meaning that the simulation model can be used to predict the actual paint performance. Originality/value This paper discusses a new trajectory generation approach to decrease the thickness error values to satisfy spray paint requirements. According to the successfully performed simulation and experimental results, the approach is useful and practical in overcoming the challenge of improving the paint thickness quality on complex-free surface.

Technology of Mobile Phone 3D Model Reconstruction Based on the Geomagic Studio

2014 ◽  
Vol 971-973 ◽  
pp. 1357-1360
Author(s):  
Hong Mei Yu ◽  
Zi Qi Wang
Keyword(s):  
Mobile Phone ◽  
Point Cloud ◽  
3D Model ◽  
Data Access ◽  
Cad Model ◽  
Point Cloud Data ◽  
Model Reconstruction ◽  
Cloud Data ◽  
3D Model Reconstruction ◽  
Modeling Strategy

Studied the modeling strategy and application features of rapid surfacing reconstruction system. The 3D digital model reconstruction of real mobile phone as an example, using non-contact optical 3D scanning point cloud data access to mobile phone, get the mobile phone CAD model through data processing by point stage, polygon stage and shape stage, and the various stages of the process and the target are discussed in this paper.

scholarly journals A Novel 3D CAD Model Retrieval Method Based on Vertices Classification and Weights Combination Optimization

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Ting Zhuang ◽  
Xutang Zhang ◽  
Zhenxiu Hou ◽  
Wangmeng Zuo ◽  
Yan Liu
Keyword(s):  
3D Model ◽  
Performance Metrics ◽  
Computational Cost ◽  
Retrieval Algorithm ◽  
Cad Model ◽  
3D Shape ◽  
3D Cad ◽  
Combination Optimization ◽  
Model Retrieval ◽  
3D Cad Model Retrieval

3D shape retrieval is a problem of current interest in different fields, especially in the mechanical engineering domain. According to our knowledge, multifeature based techniques achieve the best performance at present. However, the practicability of those methods is badly limited due to the high computational cost. To improve the retrieval efficiency of 3D CAD model, we propose a novel 3D CAD model retrieval algorithm called VSC_WCO which consists of a new 3D shape descriptor named VSC and Weights Combination Optimization scheme WCO. VSC represents a 3D model with three distance distribution histograms based on vertices classification. The weighted sum of L1 norm distances between corresponding distance histograms of two VSC descriptors is regarded as dissimilarity of two models. For higher retrieval accuracy on a classified 3D model database, WCO is proposed based on Particle Swarm Optimization and existing class information. Experimental results on ESB, PSB, and NTU databases show that the discriminative power of VSC is already comparable to or better than several typical shape descriptors. After WCO is employed, the performance of VSC_WCO is similar to the leading methods by all performance metrics and is much better by computational efficiency.

scholarly journals Prediction of Free Surface Roughening by 2D and 3D Model Considering Material Inhomogeneity

2011 ◽  
Vol 5 (12) ◽  
pp. 978-990 ◽  
Author(s):  
Tsuyoshi FURUSHIMA ◽  
Tetsuro MASUDA ◽  
Ken-ichi MANABE ◽  
Sergei ALEXANDROV
Keyword(s):  
Free Surface ◽  
3D Model ◽  
Surface Roughening ◽  
Material Inhomogeneity ◽  
2D And 3D

A Rapid Planning Method for the Freeform Surface Spraying Based on CAD Model

2013 ◽  
Vol 442 ◽  
pp. 599-604
Author(s):  
Shuang Man Xu ◽  
Wei Jing Li
Keyword(s):  
Processing Time ◽  
Planning Process ◽  
Simulation Software ◽  
Planning Method ◽  
Freeform Surface ◽  
Normal Vector ◽  
Planning Problem ◽  
Cad Model ◽  
Simulation Results ◽  
Spray Gun

In order to solve the freeform surface spray planning problem in spray industrial, this article proposed a model of the spray gun and description of the spray procedure. Then, the article presents a rapid planning method based on CAD model of the workpiece. With this method, the spray trajectory is constructed by the path points normal vector and S-shaped path using CAD model. In ABB's RobotStudio simulation software, a spray experiment is carried out. The simulation results show that this method can effectively simplify the offline planning process and save processing time.

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