Using Graphic Hardware to Accelerate Pocketing Tool-Path Generation

2013 ◽  
Vol 311 ◽  
pp. 135-140
Author(s):  
Chien Yu Lee ◽  
H.S. Lin ◽  
H.T. Yau
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Experimental Results ◽  
Path Generation ◽  
Graphic Processing Units ◽  
New Approach ◽  
Graphic Hardware ◽  
Path Geometry ◽  
The Difference ◽  
Computation Speed

In this paper, we propose a new approach to accelerate the pocketing tool-path generation by using graphic hardware (graphic processing units, GPU). The intersections among tool-path elements can be eliminated with higher efficiency from GPU-based Voronoi diagrams. According to our experimental results, the GPU-based computation speed was seven to eight times faster than that of CPU-based computation. In addition, the difference of tool-path geometry between the CPU-based and GPU-based methods was insignificant. Therefore, the GPU-method can be efficiently used to accelerate the computation while the precision is assured for the tool-path generation in pocketing machining.

A New NURBS Tool Path Generation Algorithm for Precise Sculptured Surface Machining

2010 ◽  
Vol 97-101 ◽  
pp. 2477-2480
Author(s):  
Xu Jing Yang ◽  
Guang Yong Sun ◽  
Qing Li
Keyword(s):  
Manufacturing Industry ◽  
Tool Path ◽  
Tool Path Generation ◽  
Surface Model ◽  
Sculptured Surface ◽  
Path Generation ◽  
New Approach ◽  
Surface Machining ◽  
Sculptured Surface Machining ◽  
Fitting Algorithm

This paper proposes a new approach to tool path generation in precision machining of parts with sculptured surface. It aims to develop an effective NURBS fitting algorithm suitable for machining sophisticated parts requiring smooth profile on sculptured surface. In order to generate NURBS tool path with fewer control points, a dual-loop fitting technique is proposed in this paper. A general sculptured surface model is used to test the effectiveness of this method. It is shown that the proposed algorithm proved to be robust and effective in generating precise NURBS tool path. This makes the proposed algorithm suitable to convert conventional CNC tool path to more precise NURBS tool path. This approach may be of potential to be widely implemented in the manufacturing industry.

Tool Path Generation for Top Planar Surface of Ribs in Aircraft Structural Parts

2012 ◽  
Vol 630 ◽  
pp. 315-320
Author(s):  
Yun Long Tang ◽  
Guo Lei Zheng ◽  
Bao Rui Du ◽  
Shu Lin Chen
Keyword(s):  
Delaunay Triangulation ◽  
Tool Path ◽  
Tool Path Generation ◽  
Experimental Results ◽  
Path Generation ◽  
Skeleton Extraction ◽  
Planar Surface ◽  
Process Scheme ◽  
Structural Parts ◽  
Cam Systems

In order to solve the problem regarding the rapid NC machining programming for top planar surface of ribs in aircraft structural parts, an approach based on skeleton extraction technique is presented here to generate tool path for top planar surface. Firstly, the constrained Delaunay triangulation is built to split the rib top planar surface into several sub areas and approximate skeleton branch of each sub area is extracted. Then based on these skeleton branches and process scheme, the set of machining cells of the rib top planar surface is constructed. Secondly, the problem on determining the sequence of machining cells is resolved by optimizing the machining path. Finally, the sequence of machining cells can be converted into the machining cells chain from which tool path can be calculated by CAM systems. Based on the experimental results of the comparison between the generalized pocket method and our approach, our approach is found to be more efficient in generating tool path for top planar surface of ribs.

3D Shape-Generating Processes and the G-Buffer Modeling for CNC Machining

1999 ◽  
Author(s):  
Chuang-Jang Chiou ◽  
Yuan-Shin Lee
Keyword(s):  
Error Analysis ◽  
Tool Path ◽  
Tool Path Generation ◽  
Cnc Machining ◽  
Path Generation ◽  
Machined Surface ◽  
New Approach ◽  
Surface Error ◽  
3D Shape ◽  
Tool Motion

Abstract In this paper, a new approach is presented to construct the G-buffer models by finding 3D shape-generating profiles of milling cutters. The G-buffer method is commonly used in 3-axis machining verification. In this paper, the analytic 3D shape-generating profiles are formulated to construct the swept envelope in 5-axis tool motion. The 5-axis machining G-buffer model is updated by the constructed swept envelope. The techniques presented in this paper can be used for 5-axis tool path generation and the machined surface error analysis.

Tool Path Optimization of 2D Contour Considering Stock Boundary

2012 ◽  
Vol 251 ◽  
pp. 169-172
Author(s):  
Fu Zhong Wu
Keyword(s):  
Present Method ◽  
Tool Path ◽  
Three Dimensional ◽  
Boundary Curve ◽  
Tool Path Generation ◽  
Path Optimization ◽  
Path Generation ◽  
Offset Curves ◽  
Measuring Machine ◽  
Tool Diameter

Based on analyzing the existing algorithms, a novel tool path generation of 2D contour considering stock boundary is presented. Firstly the boundary points of stock are obtained by three-dimensional measuring machine. And the boundary curve is constructed by method of features identifying. The stock boundary is offset toward outside with tool diameter. An enclosed region is formed between the contour curves and the offset curves of stock boundary. The tool path is generated by form of parallel spiral by offsetting the stock boundary in the enclosed region. Finally the validity of present method is demonstrated by an example.

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