A method and system for machine tool displacement compensation based on calibration volume
A technology of calibration volume and displacement compensation, which is applied in the field of machine tool error compensation, can solve problems such as motion axis calculation volume error, workpiece rework, and machine tool motion axis displacement compensation error, so as to improve machining precision and accuracy and reduce workpiece rework cost , the effect of ensuring the accuracy of the calculation
Inactive Publication Date: 2019-12-31
ANHUI PROVINCE JIEYONGDA INTELLIGENT MACHINE
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Problems solved by technology
[0003] At present, many machine tools do not calibrate the estimated volume when estimating the volume. If the working state of the motion axis of the machine tool changes due to other factors at a certain time, it will cause an error in the estimated volume of the motion axis and cause an error in the displacement compensation of the motion axis of the machine tool. , so that the workpiece processed by the machine tool will be deformed during this time, resulting in rework of the workpiece and a waste of manpower and material resources
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[0036] Such as figure 1 As shown, figure 1 It is a flow chart of a method for compensation of machine tool displacement based on calibration volume proposed by the present invention;
[0037] Reference figure 1 , A machine tool displacement compensation method based on calibration volume, the method includes the following steps:
[0038] Step S1, obtaining the displacement of the motion axis of the motion axis in different volumes during the working process of the machine tool, and establishing the function mapping relationship between the volume of the motion axis and the displacement of the motion axis;
[0039] In this step, the function mapping relationship between the volume of the motion axis and the displacement of the motion axis specifically includes: the function mapping relationship is divided into multiple sections, and the volume of the motion axis and the displacement of the motion axis in each section have different proportional coefficients;
[0040] In this embodiment,...
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The invention discloses a machine tool displacement compensation method and system based on calibration volume. The machine tool displacement compensation method based on calibration volume includes the steps: acquiring the displacement of the kinematic axis when the kinematic axis has different volumes during the working process of the machine tool, and establishing a function mapping relation between the kinematic axis volume and the displacement; respectively obtaining the kinematic axis volume during the working process of the machine tool at the working time, t1, t2,.., tn, recording the kinematic axis volume as v1, v2,..., vn, and establishing a kinematic axis working time and volume reckoning table; obtaining the current working time ti of the kinematic axis, and according to the ti, searching for the reckoned volume vi of the kinematic axis from the kinematic axis working time and volume reckoning table; acquiring the measured volume vi' of the kinematic axis at the working time ti, comparing the reckoned volume vi of the kinematic axis with the measured volume vi', and according to the comparison result, obtaining the calibration volume v of the kinematic axis; and according to the calibration volume v of the kinematic axis and the function mapping relation between the kinematic axis volume and the displacement, obtaining the target displacement of the kinematic axis to compensate the kinematic axis.
Description
Technical field [0001] The invention relates to the technical field of machine tool error compensation, in particular to a method and system for compensation of machine tool displacement based on a calibration volume. Background technique [0002] When the machine tool is running, there is relative movement between the transmission parts, and the frictional heat of the machine tool screw, nut seat, bearing, etc., which leads to the thermal expansion of the machine tool components, and the movement of each movement axis deviates from the target, which causes the machining error of the machine tool. To solve the above problems, it is necessary to monitor the volume change of each transmission component, and then calculate the displacement value of the machine tool displacement according to the relative relationship between the deformation volume of each transmission component and the displacement change, and then compensate it to the CNC system to achieve the purpose of compensation...
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IPC IPC(8): G05B19/404
CPCG05B19/404
Inventor 毛益飞翟祥文王树兴姜峰
Owner ANHUI PROVINCE JIEYONGDA INTELLIGENT MACHINE