Comparing the kinematic efficiency of five-axis machine tool configurations through nonlinearity errors

Abstract: In order to determine that the effect of geometric error to the machining accuracy is an important premise for the error compensation, a sensitivity analysis method of geometric error is presented based on multi-body system theory in this paper. An accuracy model of five-axis machine tool is established based on multi-body system theory, and with 37 geometric errors obtained through experimental verification, key error sources affecting the machining accuracy are finally identified by sensitivity analysis. The analysis result shows that the presented method can identify the important geometric errors having large influence on volumetric error of machine tool and is of help to improve the accuracy of machine tool economically.

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Tool Path Geometry for Multi-Axis Kinematics Conversion in CAD-CAM Integration

22nd Biennial Mechanisms Conference: Mechanism Design and Synthesis ◽

10.1115/detc1992-0336 ◽

1992 ◽

Author(s):

Jui-Jen Chou ◽

D. C. H. Yang

Keyword(s):

Machine Tool ◽

Tool Path ◽

Cad Model ◽

Geometrical Properties ◽

Time Dependent Domain ◽

Arbitrary Space ◽

Cad Cam ◽

Tool Motion ◽

And Control ◽

Five Axis

Abstract In the integration of CAD and CAM, it is necessary to relate machine tool kinematics and control in a CAM process to the geometrical data in a CAD model. The data stored in a CAD model is usually static in nature and represented by unitless parameters. Yet, in machine tool motion and control, the data should be transformed into a time dependent domain. In this paper, a general theory on the conversion from desired paths to motion trajectory is analytically derived. The geometrical properties of a desired path, including position, tangent, and curvature are related to the kinematics of coordinated motion including feedrate, acceleration, and jerk. As a result, the motion commands used as control references to track arbitrary space curves for five-axis computer-controlled machines can be generated in a rather straight-forward as well as systematic way.

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A sensitivity method to analyze the volumetric error of five-axis machine tool

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-018-2322-1 ◽

2018 ◽

Vol 98 (5-8) ◽

pp. 1791-1805 ◽

Cited By ~ 5

Author(s):

Qingzhao Li ◽

Wei Wang ◽

Yunfeng Jiang ◽

Hai Li ◽

Jing Zhang ◽

...

Keyword(s):

Machine Tool ◽

Volumetric Error ◽

Sensitivity Method ◽

Five Axis

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An Attempt of Error Tracing and Compensation Method of the Linkage Error of Five-Axis CNC Machine Tool

Volume 4: 23rd Design for Manufacturing and the Life Cycle Conference; 12th International Conference on Micro- and Nanosystems ◽

10.1115/detc2018-85521 ◽

2018 ◽

Cited By ~ 1

Author(s):

Zhong Jiang ◽

Jiexiong Ding ◽

Qicheng Ding ◽

Li Du ◽

Wei Wang

Keyword(s):

Machine Tool ◽

Machine Tools ◽

Manufacturing Industry ◽

Complex Surface ◽

Compensation Method ◽

Cnc Machine ◽

Linkage Error ◽

Error Tracing ◽

Five Axis ◽

Five Axes

Nowadays the five-axis machine tool is one of the most important foundations of manufacturing industry. To guarantee the accuracy of the complex surface machining, multi-axis linkage performance detection and compensation of five-axis machine tools is necessary. RTCP (Rotation Tool Center Point) is one of the basic essential functions for the five-axis machine tools, which can keep the tool center with the machining trajectory when five axes move synchronously. On the basis of RTCP function, a way to detect multi-axes linkage performance of five-axis machine tools is briefly introduced, and linkage error model is built in accordance with the topological structure of machine tool. Based on the feature of the linkage errors of the five-axis machine tool, the error tracing and compensation method is proposed. Some simulations and experiments that verify the error tracing method could locate the linkage error category are established. Therefore, a new attempt to detect and compensate the linkage error of the five-axis machine tool is provided in this paper.

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