The Method of Geometric Error Measurement of NC Machine Tool Based on the Principle of Space Vector’s Direction Measurement

This paper presents the design of a precise “ball-column” device to efficiently and accurately measure the geometric error terms of both rotary axes of the five-axis machine tool. A geometric error measurement method of spherical contact was proposed based on the influence of the geometric error term from a five-axis machine tool rotating axis on the integrated geometric error of the machine tool. A multiple degree of freedom, step-by-step contact method based on on-machine measure for measuring the spherical center point is proposed, and the solution formula of each geometric error term of the rotating axis is established, respectively. This method can identify 12 geometric errors based on the influence of one rotating axis on another rotating axis after long term operation. The spatial error field of the five-axis machine tool was constructed by analyzing the error law of the two rotating axes of machine tools based on various positions and postures. Finally, after the comparison of the experiment, the results showed that the accuracy of the developed error measurement device reached 91.8% and the detection time was as short as 30–40 min.

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Geometric Error Compensation Methods of Numerical Control Machine Tool

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.426.239 ◽

2012 ◽

Vol 426 ◽

pp. 239-242

Author(s):

Xiao Jun Wang ◽

Xiao Guang Fu

Keyword(s):

Machine Tool ◽

Error Compensation ◽

Reference Value ◽

Geometric Error ◽

Numerical Control ◽

Control Machine Tool ◽

Nc Machine Tool ◽

Machining Center ◽

Compensation Methods ◽

Nc Machine

In this paper the characteristics of geometric errors is discussed in detail, error compensation methods used in productive practice and relevant examples are given. Finally, the application of error compensation in different situation is discussed according to the characteristics of machining center. The machine accuracy can be improved by error compensation. It has important practical reference value for reasonable use and maintaining of NC machine tool.

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Geometric error measurement and identification for rotary table of multi-axis machine tool using double ballbar

International Journal of Machine Tools and Manufacture ◽

10.1016/j.ijmachtools.2013.10.004 ◽

2014 ◽

Vol 77 ◽

pp. 47-55 ◽

Cited By ~ 33

Author(s):

Jian-xiong Chen ◽

Shu-wen Lin ◽

Bing-wei He

Keyword(s):

Machine Tool ◽

Geometric Error ◽

Error Measurement ◽

Rotary Table ◽

Geometric Error Measurement

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The Study of Compensation Method to Numerically-Controlled Machine Tool Geometrical Error

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.670-671.1403 ◽

2014 ◽

Vol 670-671 ◽

pp. 1403-1405

Author(s):

Lian Bing Wang

Keyword(s):

Machine Tool ◽

Error Compensation ◽

Geometric Error ◽

Compensation Method ◽

System Error ◽

Nc Machine Tool ◽

Geometrical Error ◽

Compensation Methods ◽

Nc Machine ◽

Software Upgrade

In this paper, the cause of nc machine tool geometric error made a more detailed analysis, the system error compensation methods are summarized, and on this basis this paper expounds the applications of all kinds of error compensation method, in order to further realize the accuracy of machine tool software upgrade to lay the foundation.

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The Research and Application of Multi-Point and Time-Sharing Measurement Method on NC Machine Tool

Materials Science Forum ◽

10.4028/www.scientific.net/msf.697-698.249 ◽

2011 ◽

Vol 697-698 ◽

pp. 249-252

Author(s):

Yu Fen Deng ◽

Jun Jie Guo ◽

Jin Dong Wang ◽

H. Wang

Keyword(s):

Machine Tool ◽

Basic Principle ◽

Measurement Method ◽

Geometric Error ◽

Laser Tracker ◽

Time Sharing ◽

Nc Machine Tool ◽

Nc Machine

The paper presents the principle and algorithm of multi-point and time-sharing measurement method to detect the machine geometric accuracy.Its basic principle is based on laser tracker and the multilateral method,moreover,only one laser tracker is used in the measurement.Its cost is lower than multi-point and simultaneous measurement.Then the application of the method is introduced on a glass measuring instrument.The geometric error of the machine is separated in x and y direction.

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