Dynamic characteristic parameter test device and method of sliding guide rail junction surface
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A technology for sliding guide rails and dynamic characteristics, which is applied in the field of testing devices for dynamic characteristic parameters of the joint surface of sliding guide rails. It can solve the problems of complex contact state, lack of precision guarantee, and many influencing factors on the joint surface of sliding guide rails, and achieve the elimination of foundation displacement and avoid torsion. And rollover, simple effect of test device
Inactive Publication Date: 2011-09-14
NANJING UNIV OF SCI & TECH
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Although the analytical method can easily obtain the dynamic characteristic parameters of the joint surface of the guide rail, it must have more accurate basic characteristic parameters of the joint surface, and the contact state of the joint surface of the sliding guide rail is complicated, and there are many influencing factors, so there is no guarantee of accuracy.
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[0025] A device for testing dynamic characteristic parameters of a joint surface of a sliding guide rail, comprising a measurement platform, a charge amplifier 14, a data collector 15, a power amplifier 16, and an electronic computer 17, wherein the measurement platform includes a base 1, an installation platform 2, a fixed guide rail 3, Wedge block 4, inlay 5, slider 6, several piezoelectric acceleration sensors 7, vibrator 8, elastic cord 9, impedance head 10, shelf 11, normal force applying bolt 12 and rubber ring 13;
[0026] The installation platform 2 is located above the base 1. The fixed guide rail 3 is fixedly connected to the installation platform 2. The fixed guide rail is pressed and positioned by the wedge block 4. The fixed guide rail 3 is provided with a rectangular slider 6, which is adjusted by the inlay 5. Lateral clearance, the normal force bolt 12 presses the slider 6 on the installation platform 2, a rubber ring 13 is set between the normal force force bolt...
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Abstract
The invention relates to a dynamic characteristic parameter test device of a sliding guide rail junction surface, which can be simplified into a single degree of freedom system. The device comprises a base, an installation platform, a fixed guide rail, a wedge-shaped block, an inlaid strip, a sliding block, a plurality of piezoelectric type acceleration sensors, a vibration exciter, an elastic rope, an impedance head, a stand, a normal force applying bolt, a rubber ring, a charge amplifier, a data acquisition unit, a power amplifier and an electronic computer. Compared with the prior art, thedynamic characteristic parameter test device has the advantages that: the structure is compact, the test principle is distinct, dynamic characteristic parameters of the junction surface under different load states can be measured by adjusting the pretightening force of a normal force applying bolt, the vibration exciting force direction passes through the gravity of the sliding block during measurement so that vibration signals of the sliding block and the base can be measured simultaneously, the influence of the vibration signals of the base is eliminated when a frequency response function of a system is calculated, and the characteristics of high efficiency, high stability and high precision are achieved.
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 sliding 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...
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