An Algorithm for Geometric Modeling and Intersection in NC Milling Simulation Based on Triangular Mesh Model

2011 ◽  
Vol 48-49 ◽  
pp. 541-546 ◽  
Author(s):  
Dian Zhu Sun ◽  
Xin Cai Kang ◽  
Yan Rui Li ◽  
Yong Wei Sun
Keyword(s):  
Geometric Modeling ◽  
Tool Path ◽  
Triangular Mesh ◽  
Simulation Process ◽  
Mesh Model ◽  
Milling Simulation ◽  
Nc Simulation ◽  
Simulation Based ◽  
Triangular Mesh Model ◽  
Nc Milling

To achieve the accurate and efficient NC milling simulation based on the discrete triangular mesh model, we proposed an algorithm for geometric modeling and intersection. We construct the R*-tree index for upper-surface nodes of mesh model, based on which the nodes within cutting region can be obtained. We compute tool path segments within cutting projection region of node, and calculate the minimum adjustment height of node according to tool path segments within cutting projection region and then change the z-value of node. Thus, we complete the intersection calculation in simulation process. It has been proved by examples that the algorithm for geometric modeling and intersection in NC milling simulation has strong adaptation to tool path segment type and that it can accurately and efficiently reflect the effect of NC simulation process based on the discrete triangular mesh model of rough.

Tool Path Generation for Local Interference Region Machining of Triangular Mesh Model

2013 ◽  
Vol 712-715 ◽  
pp. 2154-2159
Author(s):  
Meng Yu ◽  
Chang Biao Huang ◽  
Kai Yong Jiang ◽  
Bin Liu
Keyword(s):  
Tool Path ◽  
End Milling ◽  
Triangular Mesh ◽  
Principal Curvatures ◽  
Tool Paths ◽  
Mesh Model ◽  
Interference Region ◽  
Constant Scallop Height ◽  
Triangular Mesh Model ◽  
Local Interference

In this paper, a novel method is proposed for identifying local interference region and generation iso-scallop tool paths based on triangular mesh model for 3-axis ball-end milling. With our method, the principal curvatures and directions at vertices have been computed first and a recursive merging algorithm for segmenting local interference regions is developed. In addition, a method of generation tool path with constant scallop height for local interference region is also presented. Some illustrative examples are tested that indicate the feasibility and availability.

Calculation of Areas of Cultural Relics Surface Defects Based on the Triangular Mesh Model

2012 ◽  
Vol 446-449 ◽  
pp. 3452-3456
Author(s):  
Xiao Qing Zhang ◽  
Miao Le Hou ◽  
Guang Zhu ◽  
Yun Gang Hu
Keyword(s):  
Surface Defects ◽  
Triangular Mesh ◽  
Mesh Model ◽  
Triangular Mesh Model ◽  
Cultural Relics

A discrete simulation-based algorithm for the technological investigation of 2.5D milling operations

2018 ◽  
Vol 233 (1) ◽  
pp. 78-90 ◽  
Author(s):  
Adam Jacso ◽  
Tibor Szalay ◽  
Juan Carlos Jauregui ◽  
Juvenal Rodriguez Resendiz
Keyword(s):  
Tool Path ◽  
Analytical Description ◽  
Machining Process ◽  
Simulation Algorithm ◽  
Tool Paths ◽  
Milling Operations ◽  
Nc Simulation ◽  
2.5D Milling ◽  
Milling Tool ◽  
Nc Milling

Many applications are available for the syntactic and semantic verification of NC milling tool paths in simulation environments. However, these solutions – similar to the conventional tool path generation methods – are generally based on geometric considerations, and for that reason they cannot address varying cutting conditions. This paper introduces a new application of a simulation algorithm that is capable of producing all the necessary geometric information about the machining process in question for the purpose of further technological analysis. For performing such an analysis, an image space-based NC simulation algorithm is recommended, since in the case of complex tool paths it is impossible to provide an analytical description of the process of material removal. The information obtained from the simulation can be used not only for simple analyses, but also for optimisation purposes with a view to increasing machining efficiency.

Calculation of Areas of Cultural Relics Surface Defects Based on the Triangular Mesh Model

2012 ◽  
Vol 446-449 ◽  
pp. 3452-3456
Author(s):  
Xiao Qing Zhang ◽  
Miao Le Hou ◽  
Guang Zhu ◽  
Yun Gang Hu
Keyword(s):  
Surface Defects ◽  
Three Dimensional ◽  
Triangular Mesh ◽  
Scientific Data ◽  
Topological Relationship ◽  
Mesh Model ◽  
Triangular Mesh Model ◽  
Topological Characteristics ◽  
Novel Algorithm ◽  
Cultural Relics

In order to solve the problem that need exact and scientific data in checking and restoring cultural relics, this paper presents a novel algorithm that statistics defect areas of cultural relics by calculating holes area in the in triangular mesh models.First, build the topological relationship between triangles, vertices and edges and extract boundary using boundary property of triangular mesh. Next, the holes bounding edges are linked in sequence into holes polygon. Finally, distinguish holes boundary and model exterior boundary by means of triangular mesh topological characteristics and the areas of three-dimensional holes polygon are calculated to statistics defect areas of cultural relics through the method of coordinate. Through experiments, it proved that this algorithm was correctly and reasonable.

Intersection method for triangular mesh model based on space division

2009 ◽  
Vol 29 (10) ◽  
pp. 2671-2673 ◽  
Author(s):  
Shao-li ZHANG ◽  
Yi-gang WANG ◽  
Xiao-diao CHEN
Keyword(s):  
Triangular Mesh ◽  
Model Based ◽  
Space Division ◽  
Mesh Model ◽  
Triangular Mesh Model ◽  
Intersection Method

A New Method on Voxelizing Triangular Mesh Model

2007 ◽  
Vol 6 (8) ◽  
pp. 1286-1289
Author(s):  
Ji Jia ◽  
Zheng Qin ◽  
Junying Chen
Keyword(s):  
Triangular Mesh ◽  
New Method ◽  
Mesh Model ◽  
Triangular Mesh Model

scholarly journals A Model-Based System for Real-Time Articulated Hand Tracking Using a Simple Data Glove and a Depth Camera

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4680 ◽  
Author(s):  
Linjun Jiang ◽  
Hailun Xia ◽  
Caili Guo
Keyword(s):  
Real Time ◽  
Triangular Mesh ◽  
Hand Tracking ◽  
Depth Camera ◽  
Processing Unit ◽  
Real Time System ◽  
Data Glove ◽  
Hand Motion ◽  
Mesh Model ◽  
Triangular Mesh Model

Tracking detailed hand motion is a fundamental research topic in the area of human-computer interaction (HCI) and has been widely studied for decades. Existing solutions with single-model inputs either require tedious calibration, are expensive or lack sufficient robustness and accuracy due to occlusions. In this study, we present a real-time system to reconstruct the exact hand motion by iteratively fitting a triangular mesh model to the absolute measurement of hand from a depth camera under the robust restriction of a simple data glove. We redefine and simplify the function of the data glove to lighten its limitations, i.e., tedious calibration, cumbersome equipment, and hampering movement and keep our system lightweight. For accurate hand tracking, we introduce a new set of degrees of freedom (DoFs), a shape adjustment term for personalizing the triangular mesh model, and an adaptive collision term to prevent self-intersection. For efficiency, we extract a strong pose-space prior to the data glove to narrow the pose searching space. We also present a simplified approach for computing tracking correspondences without the loss of accuracy to reduce computation cost. Quantitative experiments show the comparable or increased accuracy of our system over the state-of-the-art with about 40% improvement in robustness. Besides, our system runs independent of Graphic Processing Unit (GPU) and reaches 40 frames per second (FPS) at about 25% Central Processing Unit (CPU) usage.

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