Workbench-type automatic power hammer device and using method thereof

Abstract

The invention provides a workbench-type automatic power hammer device and a using method thereof, and is suitable for structural mode analysis and vibration shock tests. The workbench-type automatic power hammer device mainly comprises a motor, a base, a stand seat, a positioning gear sleeve rocker, a photoelectric encoder, a movable power hammer clamping clip, a fixed power hammer clamping clip and a power hammer, wherein the motor is fixed at the bottom of the stand seat; the rocker and the stand seat form a specific work angle through a positioning spring and a positioning gear sleeve; the photoelectric encoder is fixed to a rocker cover side at the tail end of the rocker; the power hammer is mounted in a place between the movable power hammer clamping clip and the fixed power hammer clamping clip which are mounted at the tail end of the rocker. A control signal is calculated through input shock speed, distance, shock times and frequency to control the motor to drive the power hammer to hit the surface of a workpiece to be tested according to a set required parameter, so as to realize an excitation test effect. According to the device and the method provided by the invention, the consistency, the repeatability and the regulation performance of the strength and the direction of excitation force can be ensured, so that the contact time, the strength and the shock frequency of the power hammer on the workpiece to be tested can be controlled conveniently, and ideal power pulse can be obtained more easily.

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...

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Problems solved by technology

[0006] At present, the hammering method test is to hammer the structure under test by manual operation force. Since the magnitude and direction of each hammering force are difficult to keep consistent, and the excitation time is also difficult to control, the repeatability is poor, and it is difficult to excite the ideal force pulse

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