A workbench type automatic power hammer device and method

An automatic force and bench-top technology, which is applied in the direction of measuring devices, test material strength by applying repetitive force/pulsation force, instruments, etc., can solve problems such as poor repeatability, difficulty in controlling excitation time, and difficulty in exciting force pulses, etc., to achieve cost savings , Extensive practicability, good repeatability and adjustment
CN104155076BActive Publication Date: 2016-07-27CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Publication Date
2016-07-27

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Abstract

A workbench type automatic hammer device and method are suitable for structural modal analysis and vibration impact testing. The device mainly includes a motor, a base, a stand, a rocker arm for positioning gear sleeves, a photoelectric encoder, a movable clamp clamped by a force hammer, a fixed clamp clamped by a force hammer and a force hammer, the motor is fixed on the bottom of the stand, the rocker arm and the stand A specific working angle is formed by the positioning spring and the positioning gear sleeve. The photoelectric encoder is fixed on the side of the rocker cover at the end of the rocker arm. According to the input impact speed, distance, impact number and frequency, the control signal is calculated, and the motor drives the power hammer to strike the surface of the test piece according to the set required parameters to achieve the test excitation effect. The invention can ensure the consistency, repeatability and adjustability of the magnitude and direction of the excitation force, facilitate the control of the contact time, the magnitude of the excitation force and the impact frequency of the hammer acting on the tested piece, and easily obtain ideal force pulses.
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Description

technical field

[0001] The invention belongs to the field of modal test equipment, and in particular relates to a workbench-type automatic hammer device method, especially suitable for workbench-type automatic power hammers with repeatable excitation force, high consistency and good adjustability, and adjustable excitation force and impact frequency. Hammer apparatus and method. Background technique

[0002] The modal test is used to measure the dynamic characteristics of the mechanical structure, and its purpose is to obtain the natural frequency, mode shape and modal damping of the structure, so as to analyze the dynamic characteristics of the mechanical structure.

[0003] The hammering method is often used in modal tests. The most important advantage of this method is that the excitation device (that is, the hammer) is not connected to the specimen, and does not add any mass to the structure, so it will not affect the dynamic characteristics of the specimen.

[0004] Th...

Claims

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