Active control closed-type hydrostatic guide rail

Abstract

The invention discloses an active control closed-type hydrostatic guide rail belonging to the technical field of fluid transmission and control. Through the invention, the thickness of an oil film can be freely adjusted within a certain range and kept unchanged before and after encountering a loading force. The active control closed-type hydrostatic guide rail comprises a guide rail base which is provided with a guide rail movable component at the upper part, wherein a main hydrostatic cavity and an auxiliary hydrostatic cavity are arranged on the guide rail movable component. The active control closed-type hydrostatic guide rail is characterized in that the output end of a hydraulic pump is connected with the input ends of a first proportional flow valve and a second proportional flow valve respectively; the input end of an overflow valve is connected with the output end of the hydraulic pump; the input end of the hydraulic pump and the output end of the overflow valve are connected with an oil tank respectively; the output end of the first proportional flow valve is connected with the auxiliary hydrostatic cavity, and the output end of the second proportional flow valve is connected with the main hydrostatic valve; the control ends of the proportional flow valves are connected with a computer through a proportional amplifier respectively; and the output end of an electric vortex displacement sensor arranged on the guide rail movable component is connected with the computer through a data acquisition card.

Description

technical field [0001] The invention belongs to the technical field of fluid transmission and control, in particular to an actively controlled closed static pressure guide rail. Background technique [0002] In order to ensure the working performance of the guide rail of the machine tool, it is not only required that the guide rail can achieve correct relative motion and stable motion accuracy, but also requires that it has the characteristics of good precision retention and the ability to withstand large variable loads. Especially for high-precision machine tools, the requirements for machining accuracy are extremely high. At this time, the shortcomings of ordinary sliding guide rails such as crawling, floating, serious wear, and unstable motion accuracy, as well as the shortcomings of poor vibration resistance and high material processing requirements of rolling guide rails can no longer meet the high requirements. The need for precision machine tool guideways. The hydros...

AI Technical Summary

Problems solved by technology

However, it has defects such as high processing precision of the capillary and torsion plate, and easy fatigue damage of the diaphragm, especially the film restrictor and the torsion plate feedback restrictor are selected according to the calculated results.

In actual application, if the initial conditions change, it is difficult to ensure the stiffness and accuracy of the hydrostatic guideway, which affects the machining accuracy

Images