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Forecast control method, device and system of precise liquid hydrostatic guideway

A technology of hydrostatic guideway and predictive control, which is applied in the direction of fluid pressure actuators, special data processing applications, instruments, etc., and can solve problems such as lag and complex and variable control of processing loads, so as to eliminate response lag and facilitate intelligentization The effect that control, heat generation is small

Inactive Publication Date: 2015-12-02
CENT SOUTH UNIV +1
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of control hysteresis caused by complex and changeable processing loads in the prior art and the inherent damping characteristics of the guide rail hydraulic system, the present invention provides a predictive control method, device and system for precision hydrostatic guide rails

Method used

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  • Forecast control method, device and system of precise liquid hydrostatic guideway
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  • Forecast control method, device and system of precise liquid hydrostatic guideway

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Embodiment Construction

[0036] The specific embodiments of the invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0037] figure 1 It shows a schematic flowchart of a predictive control method for a precision hydrostatic guide rail provided by an embodiment of the present invention, including the following steps:

[0038] S1: Simulate the processing load information of the slide plate through the CAM control system, and obtain the cutting force of each oil chamber according to the processing load information.

[0039] Under the background of precision numerical control machining technology, the CAM control system that pre-plans the toolpath path according to the initial and final parameters of the workpiece and the numerical control (NC) program has come out, and the relationship between...

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Abstract

The invention discloses forecast control method, device and system of a precise liquid hydrostatic guideway. The method comprises the following steps of: simulating processing load information of a sliding plate by a computer aided manufacturing control system and acquiring a cutting force of each oil cavity according to the processing load information; outputting a control signal according to the cutting force of each oil cavity and the preset fluctuation quantity of the sliding plate; and controlling oil flow rate by an electric-hydraulic proportion pressure regulation valve according to the control signal, and further controlling the oil pressure of the oil cavity to offset the action force of the forecast processing load on the sliding plate and compensate the thickness fluctuation of an oil membrane. By the forecast control method, the size and the change condition of the processing load are calculated in advance, the pressure of the oil cavity is adjusted in advance, the problem of response lag is completely eliminated, moreover, the fluctuation of the sliding plate under the action of dynamically processing a load can be effectively reduced, and the transmission precision of the guideway is higher.

Description

technical field [0001] The invention relates to the field of electromechanical-hydraulic integration of machine tools, in particular to a predictive control method, device and system for a precision hydrostatic guide rail. Background technique [0002] Precision machining technology is an important support for a manufacturing power. Ultra-precision machine tools, as the basis for precision machining, have always been a hot spot in the country's medium- and long-term scientific research planning. With the advantages of high rigidity, low wear, and precise operation, hydrostatic guideways quickly become the basic components shared by ultra-precision CNC machine tools. However, due to the constant change of the cutting load during the machining process, the force balance of the slide plate of the static pressure guide rail is destroyed, resulting in fluctuations in the relative position between the slide plate and the slideway of the guide rail, and changing the ideal positiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00F15B13/02
Inventor 胡均平胡骞刘成沛王琴
Owner CENT SOUTH UNIV
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