A Method Based on Magneto Mechanical Effect to Inspect Press Fit Defect of Railway Wheelset

The press fit defect of railway wheelset would cause serious safety problem on the train. A testing method base on magneto mechanical effect was proposed, the magneto mechanical principle was analyzed, the magnetic field distribution caused by stress concentration located on press fit defect of railway wheelset was researched by trials, and an instrument was developed to detect as well. Testing results showed that it was very effective in detecting the defect on the press fit surface.