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Servo system control method for five-shaft linked numerically controlled machine tool

A technology of CNC machine tools and servo systems, applied in the field of CNC, can solve the problems of complex contour shape, non-linear trajectory, single axis cannot effectively reduce contour error, etc., and achieve the effect of good tracking performance and contour performance.

Active Publication Date: 2017-01-18
SHENYANG POLYTECHNIC UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in high-end CNC machine tools, high-speed feed, high machining accuracy, complex contour shape, and serious trajectory nonlinearity are required. Only focusing on improving single-axis tracking error has been unable to effectively reduce contour error.

Method used

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  • Servo system control method for five-shaft linked numerically controlled machine tool
  • Servo system control method for five-shaft linked numerically controlled machine tool
  • Servo system control method for five-shaft linked numerically controlled machine tool

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Embodiment Construction

[0044] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] The structure of the spindle swing type five-axis linkage CNC machine tool adopted in this embodiment is as follows: figure 1 As shown, it includes five feed axes: three linear coordinate axes X, Y, Z and two rotational coordinate axes A, B, and the two rotational coordinate axes A and B are on the main shaft, rotating around the X and Y axes respectively .

[0046] The schematic diagram of the control principle of the servo system control method of the five-axis linkage CNC machine tool is as follows: figure 2 As shown, the five-axis linkage CNC machine tool servo system obtains the ideal position signal X of the X, Y, Z, A, and B axes d * , Y d * ,Z d * 、α * , β * . Ideal position signal α of A and B axes * , β * After feedforward control and feedback control, the input control signal u of the A and B axes is obtained...

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Abstract

The invention provides a servo system control method for a five-shaft linked numerically controlled machine tool. The method comprises: a five-shaft linked numerically controlled machine tool servo system obtains ideal position signals of five feed shafts; the ideal position signals of the five feed shafts are processed by feedforward control and feedback control to obtain input control signals of all feed shafts; error compensation control signals of an A shaft and a B shaft and two groups of error compensation control signals of an X shaft, a Y shaft, and a Z shaft are calculated; control signals of the A shaft and the B shaft as well as control signals of the X shaft, the Y shaft, and the Z shaft are calculated; with the obtained control signals of the A shaft, the B shaft, the X shaft, the Y shaft, and the Z shaft, five-shaft linked numerically controlled machine tool servo system controlli9ng is carried out, thereby outputting a practical position signal. According to the invention, feedback control and feedforward control of a single-shaft system as well as multi-shaft cross-coupled control and interference compensation control on linear motion by rotation motion are integrated to realize excellent tracking and contour performances, thereby forming integrated multi-shaft precise linked servo control.

Description

technical field [0001] The invention belongs to the technical field of numerical control, and in particular relates to a control method for a servo system of a five-axis linkage numerical control machine tool. Background technique [0002] A five-axis linkage CNC machine tool refers to a machine tool with five feed axes, for example, a large CNC gantry boring and milling machine. Under the command of the computer numerical control system, the five-axis linkage machining controls the multi-axis linkage servo controller and the servo motor, and coordinates the movement of the five feed axes at the same time, which can process parts with complex curved surfaces efficiently and with high precision. This five-axis linkage CNC machining can process high-quality parts that cannot be processed on general three-axis CNC machine tools or are difficult to complete with one clamping for continuous and free-form surface parts. Because the five-axis linkage CNC machine tool has the most ...

Claims

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Application Information

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IPC IPC(8): G05B19/414
CPCG05B19/414G05B2219/34013
Inventor 赵希梅金鸿雁王晨光
Owner SHENYANG POLYTECHNIC UNIV
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