A high-speed lead screw and lead screw pair comprehensive inspection test bench

Abstract

The invention discloses a high-speed screw and screw pair comprehensive examination test bed comprising a granite base, a floating guide rail and linear guide rails. The floating guide rail and the linear guide rails are arranged on the granite base parallelly. A linear guide rail holding plate is arranged on the linear guide rails, and the lower side of the linear guide rails is connected with a linear motor arranged on the granite base. A floating guide rail holding plate used for mounting a probe system is arranged on the floating guide rail and is connected with the linear guide rail holding plate through a connecting mechanism. By the aid of the test bed, a function of testing the features such as geometric accuracy, positioning accuracy, backlash, driving speed and acceleration, natural frequency, vibration mode, damping, and static and dynamic stiffness, friction torque and fatigue in the high-speed screw and screw pair and a function of testing stability in the high-speed screw and screw pair can be realized, and the rapid and accurate evaluation on most performance parameters of a precision ball screw can be given.

Description

technical field [0001] The present invention relates to the field of comprehensive performance testing of precision ball screws, in particular to characteristic tests such as geometric accuracy, positioning accuracy, backlash, driving speed and acceleration, natural frequency, mode shape, damping, and dynamic and static stiffness of ball screws and screw pairs , and friction torque, fatigue characteristics test, stability performance test and other related performance test fields. Background technique [0002] Due to the characteristics of high efficiency, high precision and high rigidity, the ball screw pair is widely used in machinery, aerospace, aviation, nuclear industry and other fields. High-speed ball screw pair refers to a ball screw pair that can adapt to high-speed requirements, meet load-bearing requirements, and can be precisely positioned. It is the preferred transmission and positioning component for realizing high-speed CNC machine tools. With the increase of...

AI Technical Summary

Problems solved by technology

[0005] There is no domestic report on a comprehensive test bench that can simultaneously complete geometric accuracy testing, acceleration, speed, positioning accuracy testing, fatigue characteristics testing, and thermal stability testing under load.

[0006] At the same time, for the test of geometric accuracy, the commonly used scanning measurement method mostly adopts passive measurement. During the measurement process, the friction force between the probe and the screw raceway is unstable, and high-frequency irregularities will be mixed in the measurement signal. Vibration signal, affecting final data processing

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