Thermal error prediction and compensation method of CNC machine tool based on parallel deep learning network
A deep learning network and CNC machine tool technology, applied in the direction of program control, computer control, general control system, etc., can solve problems such as difficult to represent the mapping relationship of monitoring signals, achieve good robustness, get rid of dependence, and improve prediction accuracy Effect
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[0032] The present invention will be further described in detail below in combination with thermal error prediction and compensation of a gantry machining center.
[0033] In specific implementation, such as figure 1 As shown, the specific steps are as follows:
[0034] 1. Collect the temperature value of the key points of the CNC machine tool and the thermal error value of the spindle corresponding to the time as sample data;
[0035] (1) According to the structure, working conditions and heat source distribution of the gantry machining center, the key points of the heat source are set at or near the parts with high heat generation of the machine tool, and 18 temperature sensors are used to detect the temperature data. The temperature key points are numbered from T1 to T18, arranged as follows:
[0036] 1) Left and right column parts
[0037] Screw upper and lower bearing housings: T1, T2; screw nuts: T3, T4; guide rails: T5, T6.
[0038] 2) beam part
[0039] Lead screw...
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