Equipment and method for detecting apparent damage on end face of curved surface of supercharger impeller

Abstract

The invention discloses equipment and a method for detecting apparent damage on the end face of the curved surface of a supercharger impeller. A rotation driving mechanism drives an impeller to be detected to do rotating motion at certain speed, a rotary encoder acquires an angle displacement signal of the impeller to be detected, generates a pulse signal, and outputs the pulse signal to an industrial camera, and the industrial camera can acquire and shoot a circumference picture of a vane of the impeller and perform analysis and comparison, thus judging whether the apparent of the end face of the curved surface of the vane of the impeller is damaged. According to the equipment and the method, a defect (bending deformation of the vane or a concave pit produced by collision of the vane) on the end face of the impeller within 0.5MM can be detected; compared with artificial visual detection, the detection equipment and the detection method which are disclosed by the invention are higher in impeller detection precision, and missing detection is unlikely to occur. As the shooting speed of the camera and the rotating speed of the impeller are very high, the whole test can be finished within 5 to 10 seconds. Therefore, the detection equipment and the detection method thereof are higher in efficiency, high in adaptability and suitable for an industrial production site.

Description

technical field [0001] The invention relates to the technical field of damage detection on the end surface of a turbocharger impeller blade, in particular to a detection device and a detection method for the surface damage detection of the curved end surface of a turbocharger impeller. Background technique [0002] A turbocharger is actually an air compressor that compresses air to increase intake air. It uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine in the turbine chamber, and the turbine drives the coaxial impeller, which presses the air sent by the air filter pipe to pressurize it into the cylinder. Since the material of the impeller of the turbocharger is usually aluminum, it is easy to be bumped, resulting in bending deformation or damage. Therefore, the appearance of the impeller needs to be inspected; at present, the appearance damage inspection of the impeller relies on human visual inspection. However, the shape of th...

AI Technical Summary

Problems solved by technology

Since the material of the impeller of the turbocharger is usually aluminum, it is easy to be bumped, resulting in bending deformation or damage. Therefore, the appearance of the impeller needs to be inspected; at present, the appearance damage inspection of the impeller relies on human visual inspection. However, in the prior art, the shape of the impeller blades of the turbocharger is usually a complex curved surface space shape, and there are many blades, so it is easy to miss related blades through manual detection.

At the same time, the accuracy of visual inspection is low, and it is impossible to detect defects on parts 100% accurately

This artificial detection method cannot be used in large-volume production sites

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