An adaptive interpolation method for tool path generation based on iso-phote for large scale wedge /aspheric lens element grinding

2012 ◽  
Author(s):  
Ningning Zhang ◽  
Feng Yang ◽  
Dongxu Zhang ◽  
Meiyun Chen ◽  
Zhenzhong Wang ◽  
...  
Keyword(s):  
Large Scale ◽  
Tool Path ◽  
Interpolation Method ◽  
Tool Path Generation ◽  
Path Generation ◽  
Aspheric Lens ◽  
Lens Element ◽  
Adaptive Interpolation

An Adaptive Tool Path Generation for Large Scale Wedge/Aspheric Lens Element Grinding Based on Isophote Interpolation

2011 ◽  
Vol 175 ◽  
pp. 121-125
Author(s):  
Ning Ning Zhang ◽  
Chen Jiang ◽  
Zhen Zhong Wang ◽  
Yin Biao Guo
Keyword(s):  
Large Scale ◽  
Tool Path ◽  
Tool Path Generation ◽  
Cnc Machining ◽  
Numerical Control ◽  
Path Generation ◽  
Aspheric Lens ◽  
Lens Element ◽  
Wedge Prism ◽  
Cad Cam

Large scale wedge/aspheric lens element is a combination of wedge prism and aspheric lens as a single piece component forming a decentred lens, which is primarily manufactured by Computerized Numerical Control (CNC) machining, especially 3-axis CNC grinding. This paper presents an efficient tool path generation approach based on isophote interpolation. The interpolation guarantees that interpolated points always stay on the iso-inclination curve of the parametric surface. This symmetry ensures that the method can improve and automate large scale wedge/aspheric lens element machining for 3-axis CAD/CAM systems. As part of the validation process, the tool paths generated are analyzed and compare with the desired part.

Open Architecture Controllers for Machine Tools, Part 2: A Real Time Quintic Spline Interpolator

1998 ◽  
Vol 120 (2) ◽  
pp. 425-432 ◽  
Author(s):  
Fu-Chung Wang ◽  
P. K. Wright
Keyword(s):  
Real Time ◽  
Tool Path ◽  
Interpolation Method ◽  
Tool Path Generation ◽  
Open Architecture ◽  
Free Form ◽  
Path Generation ◽  
Arc Length ◽  
Quintic Spline ◽  
Data Points

In Part 2 of this two-part paper, we describe a new quintic spline interpolator for real time trajectory generation during free form curve machining on the Open Architecture machine tool platform described in Part I. The research provides new capabilities for advanced CAD/CAM systems. Complicated curves and shapes designed in a CAD system are usually represented by a set of discrete data points. Subsequently, for manufacturing by a CAM system, these data points need to be converted into tool paths for machining. Therefore, the paper presents a new interpolation method that interpolates the designated data points with a quintic spline curve for real-time tool path generation. The resultant curve, generated by the proposed interpolation method, is nearly arc-length parametrized and has C3 continuity. The near arc-length parametrization property makes the real time generation of the reference commands of the cutting tool path easier. The C3 continuity guarantees the smooth motion of continuous speed, acceleration and even jerk during the machining. The combined properties of this new interpolation method enable a new quintic spline interpolator to be developed for real time tool path generation.

scholarly journals Spiral Tool Path Generation Method on Mesh Surfaces Guided by Radial Curves

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
Jinting Xu ◽  
Yukun Ji ◽  
Yuwen Sun ◽  
Yuan-Shin Lee
Keyword(s):  
High Speed ◽  
Tool Path ◽  
Interpolation Method ◽  
Tool Path Generation ◽  
Numerical Control ◽  
Path Generation ◽  
Cnc Milling ◽  
Tool Paths ◽  
Spiral Tool Path ◽  
Mesh Surface

This paper presents a new spiral smoothing method to generate smooth curved tool paths directly on mesh surfaces. Spiral tool paths are preferable for computer numerical control (CNC) milling, especially for high-speed machining. At present, most spiral tool path generation methods aim mainly for pocketing, and a few methods for machining complex surface also suffer from some inherent problems, such as selection of projecting direction, preprocessing of complex offset contours, easily affected by the mesh or mesh deformation. To address the limitations, a new spiral tool path method is proposed, in which the radial curves play a key role as the guiding curves for spiral tool path generation. The radial curve is defined as one on the mesh surface that connects smoothly one point on the mesh surface and its boundary. To reduce the complexity of constructing the radial curves directly on the mesh surface, the mesh surface is first mapped onto a circular region. In this region, the radial lines, starting from the center, are planned and then mapped inversely onto the mesh surface, thereby forming the desired radial curves. By traversing these radial curves using the proposed linear interpolation method, a polyline spiral is generated, and then, the unfavorable overcuts and undercuts are identified and eliminated by supplementing additional spiral points. Spline-based technique of rounding the corners is also discussed to smooth the polyline spiral, thereby obtaining a smooth continuous spiral tool path. This method is able to not only greatly simplify the construction of radial curves and spiral tool path but also to have the ability of processing and smoothing complex surfaces. Experimental results are presented to validate the proposed method.

scholarly journals Fast Tool Path Generation Algorithm for Large-Scale Discrete Shape

2019 ◽  
Vol 85 (6) ◽  
pp. 597-604
Author(s):  
Hiromu Kitahara ◽  
Jun'ichi Kaneko ◽  
Masahiro Ajisaka ◽  
Takeyuki Abe ◽  
Kenichiro Horio
Keyword(s):  
Large Scale ◽  
Tool Path ◽  
Tool Path Generation ◽  
Path Generation ◽  
Generation Algorithm

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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