A Portable Automatic Clamping Device for Nonlinear Ultrasonic Testing

Abstract

The invention discloses a portable automatic clamping device for nonlinear ultrasonic detection. The portable automatic clamping device comprises: a mechanical claw component, a display screen, a controller, a miniature stepping motor, an electromagnet, a pressure sensor, a square connecting rod, a wedge block, an ultrasonic excitation transducer and an ultrasonic receiving transducer. The wedge block and the electromagnet equipped with the ultrasonic excitation transducer and the ultrasonic receiving transducer are installed on the square connecting rod; the miniature stepping motor is controlled by the controller to drive the mechanical claw component to clamp a tested workpiece; the electromagnet is energized to adsorb the wedge block equipped with the ultrasonic excitation transducer and the ultrasonic receiving transducer on the surface of a metal member; and coupling pressure control of nonlinear ultrasonic detection is achieved through pressure sensor measurement and stepping motor feedback control, and the influence of poor transducer clamping to a nonlinear ultrasonic detection result is reduced. The portable automatic clamping device disclosed by the invention can be applied to planar and curved surface member detection, and has the advantages of automatic clamping, high applicability, convenient installation and use, etc.

Description

technical field [0001] The patent of the invention relates to the field of non-destructive testing, in particular to a portable automatic clamping device for nonlinear ultrasonic testing, which can be used for automatic clamping of transducers during nonlinear ultrasonic testing of curved surfaces and planar metal components. Background technique [0002] Curved surface metal components have been widely used in key equipment in aerospace, nuclear power nuclear energy, ships, pressure vessels and other industries. These components are affected by various factors such as manufacturing process, external environment, and working load during work. Corrosion, fatigue, cracks, porosity and many other common defects, if these defects cannot be detected in time, will seriously affect the normal production efficiency, and will affect the safe operation of the equipment, resulting in immeasurable losses. [0003] Ultrasonic testing is one of the most commonly used non-destructive testi...

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Problems solved by technology

[0006] For example, the authorized announcement number is CN101806778B, and the authorized announcement date is July 27, 2011. In the invention patent, a non-linear ultrasonic non-destructive testing method for continuous on-line detection of early metal fatigue damage is invented, but the patent only provides non-linear The theoretical method of linear ultrasonic nondestructive testing, without specifying the probe clamping device for nonlinear ultrasonic testing

In addition, the authorized announcement number is CN205581057U, and the authorized announcement date is an invention patent on September 14, 2016. It provides an oblique incident nonlinear ultrasonic nondestructive testing device, but the device can only be used for nonlinear ultrasonic testing of planar workpieces. Only fixed position detection, poor portability

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