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Online compensation method for spatial error of multi-axis linkage CNC machine tool

A space error, CNC machine tool technology, applied in the field of error compensation, can solve problems that do not conform to the process business process and quality management system, affect production efficiency, reduce machine tool utilization, etc.

Active Publication Date: 2019-05-03
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this method, it is necessary to determine the installation position of the parts on the machine tool in advance, which is not in line with the process business process and quality management system in most enterprises, and will reduce the utilization rate of machine tools, thereby affecting production efficiency, especially Single piece and small batch processing

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  • Online compensation method for spatial error of multi-axis linkage CNC machine tool
  • Online compensation method for spatial error of multi-axis linkage CNC machine tool
  • Online compensation method for spatial error of multi-axis linkage CNC machine tool

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Experimental program
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Effect test

Embodiment 1

[0081] The present invention is realized through the following technical solutions, as Figure 1-Figure 4 As shown, a multi-axis linkage CNC machine tool space error online compensation method, the multi-axis linkage CNC machine tool is an AC swing head five-axis CNC machine tool, and the AC swing head five-axis CNC machine tool compensates the PC machine and the servo driver through the space error Connect; the spatial error compensation PC includes a grating signal input interface, spatial error compensation software, and a grating signal output interface; the spatial error compensation software collects the grating signal of the AC swing head five-axis CNC machine tool through the grating signal input interface, according to the grating The position coordinates of the signal feedback and the error value in the error parameter file in the space error compensation software calculate the space error of the current position and the compensation value of each axis of the AC swing...

Embodiment 2

[0087] This embodiment is further optimized on the basis of the above embodiments, such as figure 1 As shown, the AC swing head five-axis CNC machine tool includes five motion axes, which are X-axis, Y-axis, Z-axis, A-axis, and C-axis; wherein the X-axis includes the X-axis linear grating ruler, and the Y-axis includes the Y-axis Linear grating scale, Z-axis includes Z-axis linear grating scale, A-axis includes A-axis circular grating scale, C-axis includes C-axis circular grating scale; the X-axis linear grating scale, Y-axis linear grating scale, Z-axis linear grating scale The ruler, the A-axis circular grating ruler, and the C-axis circular grating ruler are respectively connected to the grating signal input interface.

[0088] The servo driver includes an X-axis servo driver, a Y-axis servo driver, a Z-axis servo driver, an A-axis servo driver, and a C-axis servo driver respectively connected to the grating signal output interface.

[0089] It should be noted that, throu...

Embodiment 3

[0092] This embodiment is further optimized on the basis of the above embodiments, such as figure 1 As shown, the error parameter file in the spatial error compensation software is a text file in which error parameters are obtained through measurement according to certain rules.

[0093] It should be noted that, through the above improvements, the error parameter file inserted into the spatial error compensation software is a text file with error parameter values ​​written according to certain rules. The error parameter values ​​are obtained through measurement and are the input of the error model. The Spatial Error Compensation software uses the error parameter values ​​to calculate the spatial error. The error parameter value is related to the structure type of the machine tool. This embodiment takes the AC swing head axis numerical control machine tool as an example, including the following error parameters:

[0094] A total of 18 items of motion errors of X / Y / Z linear axi...

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Abstract

The invention discloses an online compensation method for a spatial error of a multi-axis linkage CNC machine tool. An AC pendulum five-axis CNC machine tool is connected with a servo driver through aspatial error compensation PC, the spatial error compensation PC includes a grating signal input interface, spatial error compensation software and a grating signal output interface, the spatial error compensation software acquires a grating signal of the AC pendulum five-axis CNC machine tool through the grating signal input interface, according to the position coordinate fed back by the gratingsignal and an error value in an error parameter file in the spatial error compensation software, a spatial error of the current position and a compensation value of each axis of the AC pendulum five-axis CNC machine tool are calculated, after a feedback signal of a grating is modified according to the compensation value, the feedback signal is sent to the servo driver through the grating signal output interface. The method is advantaged in that the online error compensation idea and method are realized by modifying the grating feedback signal, iterative compensation calculation is carried outin two steps, iteration is made to converge quickly, and computational efficiency is high.

Description

technical field [0001] The invention relates to the technical field of error compensation, in particular to an online compensation method for space errors of a multi-axis linkage numerical control machine tool. Background technique [0002] The spatial error of CNC machine tools refers to the spatial pose error of the tool relative to the workpiece caused by the combination of geometric errors and positioning errors. Different from single-item error compensation, such as pitch compensation, spatial error compensation first calculates the spatial position error of the tool relative to the workpiece and the tool axis vector error, and then decomposes the comprehensive error into each motion axis for compensation. [0003] In recent years, several mainstream foreign CNC system manufacturers can provide spatial error compensation function options, such as VCS (volumetric compensation system) of SIEMENS, SEC of FIDIA CNC system, 3DError Compensation of FANUC, etc. These space er...

Claims

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Application Information

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IPC IPC(8): G05B19/404
Inventor 朱绍维孙超牟文平宋智勇刘大炜
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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