A Novel Method of Efficient Machining Error Compensation Based on NURBS Surface Control Points Reconstruction

Lai, Jintao; Fu, Jianzhong; Wang, Yi; Shen, Hongyao; Xu, Yanliang; Chen, Zichen

doi:10.1080/10910344.2015.1051538

Cited by 12 publications

(2 citation statements)

References 24 publications

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“…In order to accurately calculate the extreme points on the free-form surface, we refer to the method of combining rough search and precise positioning in the literature [27]. This method discretizes the surface uniformly in the uv parameter space, and calculates its corresponding type value point Pij.…”

Section: Surface Extreme Pointsmentioning

confidence: 99%

Research on on-machine measurement of machining error based on T-spline surface reconstruction

Fu¹,

Sheng²,

Luo³

et al. 2021

Meas. Sci. Technol.

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The machining quality of the parts can be directly inspected and analyzed through contact on-machine measurement. However, during the measurement of free-form surfaces, aiming at the problem that the spline surface fitting method requires too many measuring points and the original design information is not borrowed during reconstruction, a T-spline surface reconstruction method based on the centroidal Voronoi tessellation (CVT) sampling strategy is proposed. In the uv parameter region of the original designed NUBRS surface, the Gaussian curvature of the surface is taken as the regional density function, and the CVT is generated by the Lloyd algorithm. Based on the T-grid constructed by an adaptive quadtree method, three kinds of surface feature points are defined as measuring points. By using constrained optimization theory and hierarchical T-mesh knowledge, the generation and local optimization of T-spline surface based on the reconstruction of the original NUBRS surface control points is realized. At last, the example of the surface machined by Makino V77 machine tool and measured with BLUM TC60 probe shows that, the method in this paper can effectively fit a surface which is more suitable for actual processing by adjusting a relatively small number of control vertices with a limited number of measurement points.

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Section: Surface Extreme Pointsmentioning

confidence: 99%

Research on on-machine measurement of machining error based on T-spline surface reconstruction

Fu¹,

Sheng²,

Luo³

et al. 2021

Meas. Sci. Technol.

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show abstract

“…Ge et al [20] proposed a method that combined on-machine measurement, error modeling, and real-time compensation for thin-walled workpieces that improved the machining accuracy after compensation. Lai et al [21][22] compensated for non-uniform rational B-spline (NURBS) surfaces and T-spline surfaces. Ma et al [23] compensated for surface machining errors by changing the CAD model using on-machine measurement data.…”

Section: Introductionmentioning

confidence: 99%

Machining error compensation based on a compliance error model reconstructed surface method

Chen

Yu²,

Tang³

et al. 2023

Preprint

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To reduce the errors caused by the overall compliance of the system and the machine tool wear during the machining process for curved workpieces, and to improve the machining accuracies of curved workpieces, a machining error compensation method using a compliance error model to reconstruct the surface was adopted. During a process involving multiple cuts, on-machine measurement (OMM) was achieved by replacing the cutting tool with a touch probe. After the last semi-finishing cut, the error values were measured and compensated for using a compliance error model that predicted the change in the overall compliance of the system and estimated the error at the finishing cut depth based on the measured machining error at the previous cut depth. Finally, the machining errors before and after compensation of formula and free-form surface workpieces were verified experimentally. For the formula surface workpiece, the maximum value of the machining error was reduced from 0.057 mm to 0.0163 mm, and the average absolute value of the machining error was reduced from 0.047 mm to 0.0032 mm after compensation when using the method based on a compliance error model reconstructed surface. For the free-form surface workpiece, the maximum value of the machining error was reduced from 0.0586 mm to 0.0166 mm, and the average absolute value of the machining error was reduced from 0.0483 mm to 0.0057 mm after compensation using the compliance error model reconstructed surface method. It was verified that this method could effectively reduce machining errors and improve the machining accuracy of machine tools. This method can be used to predict and compensate for machining errors at different cut depths, which is of great research significance for machining various types of curved workpieces.

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A Novel On-Machine Measurement Method Based on the Force Controlled Touch Probe

Zhao

Ding

2018

Intelligent Robotics and Applications

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A Novel Method of Efficient Machining Error Compensation Based on NURBS Surface Control Points Reconstruction

Cited by 12 publications

References 24 publications

Research on on-machine measurement of machining error based on T-spline surface reconstruction

Research on on-machine measurement of machining error based on T-spline surface reconstruction

Machining error compensation based on a compliance error model reconstructed surface method

A Novel On-Machine Measurement Method Based on the Force Controlled Touch Probe

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