Joint surface dynamic characteristic parameter testing device of rolling guide rail and testing method thereof

Abstract

The invention relates to a joint surface dynamic characteristic parameter testing device of a rolling guide rail, which can be simplified to a single-degree-of-freedom system. The joint surface dynamic characteristic parameter testing device comprises a base, a mounting bottom plate, a rolling guide rail, a rolling guide rail slider, a bridge plate, a plurality of piezoelectric acceleration sensors, an exciter, an elastic rope, a rubber ring, a frame, an impedance head, a normal pressing bolt, a charge amplifier, a data collector, a power amplifier and a computer. Compared with the prior art,the joint surface dynamic characteristic parameter testing device has the significant advantages of compact structure and clear testing principle, and can simultaneously measure the joint surface dynamic characteristic parameters in the normal and lateral directions of the rolling guide rail. In addition, the device can measure the joint surface dynamic characteristic parameters under different load states by adjusting the pre-tightening force of the normal pressing bolt; the exciting force direction passes through the gravity center of the bridge plate during the measurement; the vibration signals of the bridge plate and the base can be measured at the same time; and the influences of basic vibration signals can be eliminated during the measurement of the system frequency response function. Therefore, the joint surface dynamic characteristic parameter testing device has the advantages of high efficiency, high stability and high accuracy.

Description

technical field [0001] The invention relates to a testing device for dynamic characteristic parameters of a mechanical joint surface and a testing method thereof, in particular to a testing device for dynamic characteristic parameters of a rolling guide rail joint surface and a testing method thereof. Background technique [0002] There are a large number of mechanical joint surfaces in the mechanical structure, and the contact stiffness and damping of these joint surfaces have an important influence on the performance of the mechanical structure. 60-80% of the total rigidity of the machine tool. Therefore, accurate acquisition of the dynamic characteristic parameters of the mechanical interface is the basic guarantee for the analysis of the overall dynamic characteristics of the mechanical structure. At present, although various dynamic models of mechanical joint surfaces have been established, it is still difficult to obtain the basic dynamic characteristic parameters (su...

AI Technical Summary

Problems solved by technology

The dynamic characteristic parameters of the joint surface of the rolling guide rail were identified by the modal test method, but the test device and method were relatively simple, lacked theoretical support, and did not effectively exclude the influence of the foundation displacement, so there were certain errors

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