Numerically-controlled machine tool spindle thermal extension error real-time compensation method
A technology of real-time compensation and CNC machine tools, applied in the direction of program control, computer control, general control system, etc., can solve problems such as real-time compensation that does not involve the thermal elongation error of the spindle, and improve the adaptability of working conditions and the robustness of the model Strong, reduced-complexity effects
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[0027] The implementation process of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions.
[0028]The machine tool selected in the embodiment is a precision vertical machining center, the maximum spindle speed is 6000r / min, the axis of the spindle is consistent with the Z axis, and the positioning accuracy of the linear axis is 0.01mm. Two temperature sensors Pt100, measuring range 10℃~100℃, output voltage signal 0V~10V; displacement sensor ZX-EM, measuring range 2mm, linearity ±0.5%, output voltage signal -5V~+5V. The ambient temperature is 18°C to 23°C.
[0029] The real-time compensation process for the thermal elongation error of the CNC machine tool spindle is as follows: figure 1 As shown, the specific steps of the method are as follows:
[0030] In the first step, the spindle temperature sensor S is respectively arranged near the front bearing of the spindle 3 and on the spindle motor 1 1 and...
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