A composite B-spline method for cutter path generation on free-form surfaces

2005 ◽  
Vol 24 (2) ◽  
pp. 83 ◽  
Author(s):  
Zhu Taosheng ◽  
Y.S. Wong ◽  
M.A. Mannan
Keyword(s):  
Free Form ◽  
Path Generation ◽  
Spline Method ◽  
B Spline ◽  
Cutter Path ◽  
Cutter Path Generation ◽  
Free Form Surfaces

Isoscallop of Self-Adaptive Tool Orientation with Toroidal Cutter under Optimum Orientation of MCPs

2012 ◽  
Vol 562-564 ◽  
pp. 713-716 ◽  
Author(s):  
Ying Chen ◽  
Yi Qiang Wang
Keyword(s):  
Tool Path ◽  
End Milling ◽  
Complex Problem ◽  
Strip Width ◽  
Free Form ◽  
Tool Orientation ◽  
Constant Scallop Height ◽  
Cutter Path ◽  
Cutter Path Generation ◽  
Free Form Surfaces

End-milling of free-form surfaces on 5-sxis NC tools is a complex problem which has been studied by a large number of research scientists. When end-milling non-convex surfaces, there is a risk of interference between the tool and the surface. This paper presents a new approach to generate gouging-free tool path for constant scallop-height machining using 5-axis toroidal milling. Based on second-order approximations of the machined strip width, we present locally optimal cutting positions for cutting directions. The largest machined strip width of iso-scallop and the corresponding gouging-avoidance tool orientation are calculated. In the cutter path generation procedures, the master cutter paths have been chosen from the minimum curvature loci of the surface. The tool path generated by this method are also compared with that of the long edge of surface as the MCP, the results of simulation show that the method can yield a reduction in line segments of tool path . Velocity curve and acceleration curve are smoother.

scholarly journals Measurement point sampling method for inspection of parts with free-form surfaces

2018 ◽  
Vol 10 (11) ◽  
pp. 168781401880957 ◽  
Author(s):  
Dezhong Zhao ◽  
Wenhu Wang ◽  
Jinhua Zhou ◽  
Ruisong Jiang ◽  
Kang Cui ◽  
...  
Keyword(s):  
Measurement Accuracy ◽  
Sampling Method ◽  
Free Form ◽  
Surface Inspection ◽  
B Spline ◽  
Spline Curves ◽  
Data Points ◽  
Manufacturing Accuracy ◽  
Method Of Measurement ◽  
Free Form Surfaces

Parts must be measured to evaluate the manufacturing accuracy in order to check whether their dimension is in expected tolerance. In engineering, parts with free-form surfaces are generally measured by high-precision coordinate-measuring machines. The measurement accuracy is usually improved by increasing the density of measurement points, which is time-consuming and costly. In this article, a novel sampling method of measurement points for free-form surface inspection is proposed. First, surface inspection is simplified into the inspection of a number of section curves of the surface. Second, B-spline curves constructed with an iterative method are employed to approximate these section curves. Subsequently, data points necessary to construct the B-spline curves are taken as the measurement points. Finally, the proposed method is compared with other two sampling methods. The results indicate that the proposed method greatly reduced the number of measurement points without decreasing the precision of surface modeling.

A Generic Approach to Free Form Surface Generation

2002 ◽  
Vol 2 (4) ◽  
pp. 294-301 ◽  
Author(s):  
J. Cotrina-Navau ◽  
N. Pla-Garcia ◽  
M. Vigo-Anglada
Keyword(s):  
Theoretical Approach ◽  
Differentiable Manifold ◽  
Surface Generation ◽  
Free Form ◽  
B Spline ◽  
Free Form Surface ◽  
Manifold Theory ◽  
Free Form Surfaces

A theoretical approach to construct free form surfaces is presented. We develop the concepts that arise when a free form surface is generated by tracing a mesh, using differentiable manifold theory, and generalizing the B-spline scheme. This approach allows us to define a family of practical schemes. Four different applications of the generic approach are also presented in this paper.

Adaptive iso-planar tool path generation for machining of free-form surfaces

2003 ◽  
Vol 35 (2) ◽  
pp. 141-153 ◽  
Author(s):  
S. Ding ◽  
M.A. Mannan ◽  
A.N. Poo ◽  
D.C.H. Yang ◽  
Z. Han
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Free Form ◽  
Path Generation ◽  
Free Form Surfaces

Tool Path Generation Method for High-Quality Machining of Free-Form Surfaces

2020 ◽  
Author(s):  
Yuki Takanashi ◽  
Hideki Aoyama
Keyword(s):  
Tool Path ◽  
High Accuracy ◽  
Tool Path Generation ◽  
Free Form ◽  
Machining Accuracy ◽  
Path Generation ◽  
High Quality ◽  
Nc Program ◽  
Free Form Surface ◽  
Free Form Surfaces

Abstract Machining data (NC program) is generated by a CAM system, which generates the tool path from the target shape as a plane approximation surface instead of a free-form surface. Owing to this plane approximation, machining accuracy is reduced. In this paper, we propose a method to process the shape with high accuracy by defining the areas where accuracy is not required as a plane approximation surface and defining the part where accuracy is required as free-form surfaces.

Tool path generation for pattern sculpting on free-form surfaces

2012 ◽  
Vol 67 (9-12) ◽  
pp. 2469-2476 ◽  
Author(s):  
Jinting Xu ◽  
Xiangkui Zhang ◽  
Shunke Wang ◽  
Jianhuang Wu
Keyword(s):  
Tool Path ◽  
Tool Path Generation ◽  
Free Form ◽  
Path Generation ◽  
Free Form Surfaces

An Octree Approach to Rough Machining

1987 ◽  
Vol 201 (3) ◽  
pp. 157-163 ◽  
Author(s):  
M F Yuen ◽  
S T Tan ◽  
W S Sze ◽  
W Y Wong
Keyword(s):  
Three Dimensional ◽  
Numerical Control ◽  
Path Generation ◽  
Layer By Layer ◽  
Rough Machining ◽  
Numerical Control Machining ◽  
Solid Models ◽  
Cutter Path ◽  
Jigs And Fixtures ◽  
Cutter Path Generation

This paper presents an octree subdivision based algorithm of automatic cutter path generation for machining on a numerical control machining centre. Both the stock and the part are represented by solid models. The machining strategy is based on a layer by layer approach taking care of the cutter strength and the variation of the part geometry. This approach allows the problem to be reduced from a three-dimensional to a two-dimensional cutter path generation problem which is solved by a quadtree representation of the plane. The method can be easily extended to include the jigs and fixtures and any other obstacles which would be represented by solid models. Algorithms are described in Pascal-like structure.

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