A test method for oil film lubrication performance of static pressure turntable running at constant linear velocity

Abstract

The invention discloses a method for detecting the lubricating performance of an oil film running at a constant linear velocity on a static pressure turntable, comprising the following steps: analyzing the characteristics of the constant linear velocity operation of the static pressure turntable; according to the periodic distribution characteristics of the oil pad of the static pressure turntable, taking a single rectangular oil chamber for analysis, Divide the rectangular oil chamber into A area and B area, set the direction of the constant linear velocity of the static pressure turntable and set the coordinate system according to the basic parameters of the oil pad; calculate and analyze the rectangular oil according to the direction of the constant linear velocity of the static pressure turntable and the basic parameters of the oil pad lubricating oil flow rate in area A and B of the cavity; calculate and analyze the lubricating oil flow rate in area A and B of the rectangular oil chamber according to the constant linear velocity direction of the static pressure turntable and the basic parameters of the oil pad; The steady-state flow reference value is compared, and if it is lower than the reference value, it will be replaced in time. The invention has important significance for effectively predicting the oil film lubrication performance of the static pressure turntable running at constant linear speed and improving the surface quality of the processed workpiece on the static pressure turntable.

Description

technical field [0001] The invention belongs to the technical field of oil film lubrication performance detection, and in particular relates to a method for detection of oil film lubrication performance of a static pressure turntable running at a constant linear speed. Background technique [0002] The constant linear speed cutting function is an essential function of high-end CNC lathes. Using this function can improve the processing efficiency and ensure the consistency of the surface quality of the processed surface, which has broad application prospects. In this mode, the spindle speed changes continuously with the diameter of the workpiece, and the oil film in the gap of the hydrostatic bearing is always in the process of changing from one stable working state to another stable working state, which causes the pressure in the oil chamber to fluctuate, and then affect the running accuracy. Based on this, the present invention theoretically analyzes the lubrication charac...

AI Technical Summary

Problems solved by technology

In this mode, the spindle speed changes continuously with the diameter of the workpiece, and the oil film in the gap of the hydrostatic bearing is always in the process of changing from one stable working state to another stable working state, which causes the pressure in the oil chamber to fluctuate, and then have an impact on running accuracy

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