Journal ArticleDOI
A new test part to identify performance of five-axis machine tool-Part II validation of S part
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TLDR
A new test part, the S part, has been further discussed on its validation, which presents more machine abilities than NAS979, which test well the performance of a five-axis machine center.Abstract:
A new test part, the S part, has been further discussed on its validation. Researches have shown dynamic errors, especially for follow-up errors that mainly contribute to dimensional errors of the S part. The models of mechanical system, servo system, are set up to find out the key dynamic machine factors. Coupled with the motions of five axes, the follow-up errors, the actual positions of the tool center, and the contouring error are calculated, which are used to analyze the effect of factors. Results show that different machine factors have different error curves on the S part surface. So the algorithm to track the cause of the processed error has been developed. Then, the S part cutting experiments are carried out to testify the analysis results. Both analysis and experiment results have a good agreement. Finally, the characteristics of the S part are compared with the commonly used test part NAS979. Obviously, the S part presents more machine abilities than NAS979, which test well the performance of a five-axis machine center.read more
Citations
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Dynamic accuracy evaluation for five-axis machine tools using S trajectory deviation based on R-test measurement
TL;DR: A new S trajectory kinematic measurement method to evaluate the dynamic accuracy of five-axis machine tools based on R-test measurements and is more sensitive to most geometric errors and dynamic errors than the conical test described in ISO10791.6 quantitatively.
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An improved adaptive sampling strategy for freeform surface inspection on CMM
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Tool deflection error compensation in five-axis ball-end milling of sculptured surface
TL;DR: In this paper, the authors proposed a method to compensate the tool deflection induced by cutting force by modifying the tool paths in five-axis milling of sculptured surfaces by applying the mirror method to calculate the tool position and orientation.
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CAD-based measurement planning strategy of complex surface for five axes on machine verification
TL;DR: In this paper, an on-machine verification (OMV) measurement planning strategy for CAD-based measurement of free-form surfaces on five-axis machines is presented, where an adaptive sampling strategy is used to obtain effective measured points, probe path optimization, verification, post-processing, and measurement.
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A smooth and undistorted toolpath interpolation method for 5-DoF parallel kinematic machines
TL;DR: Simulation based on actual toolpath and machine model prove that the proposed algorithm realizes the smoothness of acceleration in all toolpath components, decreases the shock to the system, and reduces the surface error after cutting.
References
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Journal ArticleDOI
Geometric error measurement and compensation of machines : an update
Heinrich Schwenke,Wolfgang Knapp,Han Haitjema,Albert Weckenmann,Robert Schmitt,Flm Frank Delbressine +5 more
TL;DR: In this article, the authors review the fundamentals of numerical error compensation and the available methods for measuring the geometrical errors of a machine and discuss the uncertainties involved in different mapping methods and their application characteristics.
Journal ArticleDOI
Theory and simulation for the identification of the link geometric errors for a five-axis machine tool using a telescoping magnetic ball-bar
TL;DR: A method based on the mathematical analysis of singularities of linear systems is used to assist in selecting a minimal but sufficient set of link error parameters for the calibration of a machine tool.
Journal ArticleDOI
Case study: A comparison of error sources in high-speed milling
TL;DR: In this paper, a case study devised to quantify the relative contributions of geometric, thermal, contouring, and cutting force errors to machined part dimensional errors is presented, where the effects of the first three error components were related to part dimensions using a homogeneous transformation matrix approach integrated into a Monte Carlo simulation.
Journal ArticleDOI
Modeling and improvement of dynamic contour errors for five-axis machine tools under synchronous measuring paths
Ming-Tzong Lin,Shih-Kai Wu +1 more
TL;DR: A contour error model of the tool center point (TCP) for a five-axis machine tool is proposed to estimate dynamic contour errors on three types of measuring paths to improve dynamic contouring accuracy of the TCP significantly.
Journal ArticleDOI
Analysis of circular trajectory equivalent to cone-frustum milling in five-axis machining centers using motion simulator
TL;DR: In this article, the effect of the half apex angle of the cone-frustum on the motion trajectory under simultaneous five-axis motion and the sensitive direction of the ball bar is measured along the three-dimensional circular conical path.