The Application of Eddy Current Testing Machine in Automobile Nondestructive Testing

The nondestructive testing technology of eddy current testing machine is a comprehensive testing technology to measure and evaluate the physical and mechanical properties, various defects and other technical parameters inside or on the surface of the object without damaging the object. With the development of science and production, its application scope is becoming wider and wider.

Eddy current testing machine has been widely used in automobile manufacturing industry. For many auto parts, such as brake drum, brake disc, journal, steering knuckle and other key safety parts, if there are surficial micro cracks or internal defects, the cracks will gradually develop from the outside to the inside or from the inside to the outside under long-term alternating stress, and then produce potential safety hazards. Therefore, in the manufacturing process, the components must go through a series of nondestructive testing by eddy current testing machine. The commonly used nondestructive testings of auto parts include ray testing, ultrasonic testing, electromagnetic eddy current testing, magnetic powder testing and penetration testing, which are also known as the five major flaw detection methods.

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At present, the most widely used nondestructive testing method in the detection of automobile parts is the ultrasonic testing method of eddy current testing machine. The A-type ultrasonic eddy current testing machine produced by the eddy current testing machine manufacturer is most used in the ultrasonic flaw detection of eddy current testing machine at home and abroad. Using A-type ultrasonic display, it's easy to operate and low in price, and able to locate and quantify defects, therefore it has been widely used in production inspection. However, there are many defects of this method. For example, the detection results are not intuitive, there are no records, it is difficult to detect flaws, and it is interfered by many human factors. The defects seriously affect the reliability of detection.