Numerical-control machine-tool rectilinear motion shaft geometry precision rapid detection method

A technology of linear motion and CNC machine tools, applied in program control, computer control, general control systems, etc.

Active Publication Date: 2018-08-17
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing methods, aiming at the rapid detection of the geometric accuracy o

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  • Numerical-control machine-tool rectilinear motion shaft geometry precision rapid detection method
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  • Numerical-control machine-tool rectilinear motion shaft geometry precision rapid detection method

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Embodiment Construction

[0060] The specific implementation manners of the present invention will be described in detail below in conjunction with the drawings and technical solutions.

[0061] The CNC machine tool under test is a bed of a vertical machining center, and the stroke length of the guide rail is 1500mm.

[0062] The first step is to assemble the rapid detection device for the geometric accuracy of the linear motion axis of the CNC machine tool

[0063] Two uniaxial accelerometers: 1 # Single-axis acceleration sensor 1, 2 # A 2-way acceleration sensor group consisting of 2 single-axis acceleration sensors; guarantee 1 # The measurement direction of the uniaxial acceleration sensor 1 is the n direction, 2 # The measurement direction of the uniaxial acceleration sensor 2 is the t direction, and the uniaxial acceleration sensors are respectively fixed in the detection box 3 through nuts; the direction I is the direction of the linear motion axis, and the detection box 3 is fixed on the lin...

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Abstract

A numerical-control machine-tool rectilinear motion shaft geometry precision rapid detection method belongs to the numerical-control machine-tool detection technology field. The method is characterized by firstly, installing a measurement device on a rectilinear motion shaft, carrying out uniform motion at three different speeds along with the rectilinear motion shaft, and carrying out multichannel acquisition automatically and storing motion measurement point acceleration data by an upper layer measurement system; then, based on a condition that a same geometric error signal can be decomposedinto different frequency components, filtering acceleration signals under different measurement speeds; and finally, carrying out time-domain quadratic integral on each filtered acceleration data andacquiring displacement data, carrying out data superposition on the displacement data under three kinds of measurement speeds till that rectilinear motion shaft deformation calculation is completed;and through an endpoint line connection method, calculating the linearity of a rectilinear motion shaft, and completing the rapid linearity measurement of the machine tool rectilinear motion shaft. The method has advantages that debugging is convenient; measurement efficiency is high; and data processing capability is good. The rapid measurement of the geometric accuracy of machine-tool rectilinear motion shaft can be realized, an equipment integration level is high and automation can be conveniently realized.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tool detection, and in particular relates to a rapid detection method for the geometric accuracy of a linear motion axis of a numerical control machine tool. Background technique [0002] The linear motion axis is the basic component of the CNC machine tool, and its precision performance is the key to the machining quality of the CNC machine tool. Geometric accuracy is an important accuracy index of linear motion axes, and it will inevitably deteriorate with the service of the machine tool. With the increasing degree of geometric accuracy decline, CNC machine tools not only cannot meet the processing requirements of the product, but even cause excessive wear of the friction pairs of key parts of the machine tool, resulting in the scrapping of the machine tool. Therefore, the acquisition of the geometric accuracy status of CNC machine tools is of great significance for the accura...

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Application Information

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IPC IPC(8): G05B19/401
CPCG05B19/401
Inventor 王永青刘海波吴嘉锟刘阔况康厉大维
Owner DALIAN UNIV OF TECH
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