Device and method for comprehensive measurement of static stiffness of linear guide rail pair

Abstract

The invention discloses a measuring device and method capable of measuring the vertical, pitching, inclined and deflection static rigidity of a linear guide rail pair efficiently with high precision.A fixing seat of the measuring device is fixed to a horizontal deck plate, the guide rail pair and a datum plate are fixed to the fixing seat, and displacement sensor sets used for measuring the deformation amount of the guide rail pair is mounted on a sliding block; a pressure sensor is connected with a pressing block; and a loading device drives the pressing block to descend to apply the surfaceloads F1 and F2 to the sliding block. The measuring method comprises the steps that the loads F1 and F2 are decomposed into equivalent loads in the four directions, and the deformation amount measured by the displacement sensor sets is also converted into the equivalent deformation amounts in the four directions. According to the measuring device and method capable of measuring the vertical, pitching, inclined and deflection static rigidity of the linear guide rail pair efficiently with the high precision, the accuracy and reliability of the measuring results are greatly improved while it isensured that the static rigidity of the rolling linear guide rail pair is efficiently measured, the errors between the measuring results of all the static rigidity and theoretical values are 8% or below, and important significance is achieved for assessment of the comprehensive static rigidity of the guide rail pair.

Description

technical field [0001] The invention belongs to the field of rolling linear guide rail pair testing, in particular to a comprehensive measuring device and method for static stiffness of a linear guide rail pair. Background technique [0002] With the vigorous development of modern manufacturing technology, the manufacturing industry has put forward higher requirements for CNC machine tools that play an important role, especially in three aspects: positioning accuracy, guiding accuracy, and machining accuracy. Rolling linear guides are widely used in CNC machine tools due to their advantages such as small frictional resistance, good motion characteristics, long life, good carrying capacity, and good economy. However, for a long time, foreign products have firmly occupied the domestic market of medium and high-end rolling linear guides, and the root cause of this situation is the lack of key basic technology research and the lack of advanced testing instruments and product per...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a comprehensive measuring device and method for the static stiffness of linear guide rail pairs, so as to solve the problems of low efficiency of static stiffness measurement and evaluation of linear guide rail pairs and inaccurate measurement results

Images