Industry introduction

In order to ensure the safety and reliability of the car, many parts (such as brake disc, brake hub, drive shaft, steering knuckle, valve, piston, ball pin, etc.) become key parts.

If such auto parts have small defects, under the action of alternating stresses of long-term driving, the defects will extend or expand into larger defects. Although it will not cause damage immediately in the early days of use, it will have great potential safety hazards. Therefore, such parts must go through a series of quality tests in the manufacturing process to ensure that they are intact in order to leave the factory as qualified products.

As people have higher and higher requirements for automobile quality and safety, eddy current testing technology is also increasingly applied to all aspects of automobile parts quality testing with its inherent advantages (fast detection speed, low energy consumption of equipment, pollution-free emissions, less manual intervention, and high degree of automation), and has a trend of gradually replacing traditional magnetic particle testing.

Application Case: Brake disc

The automobile brake disc is usually produced by casting method, and there are common defects in the processing and manufacturing process, and its quality will directly affect the safety performance of the automobile.

At present, the brake disc workpiece usually adopts the traditional magnetic particle flaw detection method for defect detection, which has some shortcomings and shortcomings such as slow detection speed, large environmental pollution, high energy consumption of equipment and relying on manual judgment.

The use of eddy current testing technology can effectively detect the defects of the brake disc, and at the same time make up for the shortcomings of the traditional magnetic particle testing.