How to detect Full Threaded Stud? Bolt detection is divided into two types: manual and machine. Manual is the most primitive and most commonly used consistent detection method. In order to minimize the outflow of defective products, the general production company personnel inspect the packaged or shipped products by visual inspection to eliminate defective products (defects include tooth injuries, mixing, rust, etc.).
Another way is automatic machine inspection, mainly magnetic particle inspection. Magnetic particle inspection uses the interaction between the leakage magnetic field at the bolt defect and the magnetic powder. Stud Manufacturer addresses the difference between the magnetic permeability of the bolts (such as cracks, slag inclusions, mixing, etc.) and the permeability of steel after magnetization. The magnetic field at the discontinuity will be turbulent, forming part of the magnetic flux leakage, and a leakage magnetic field will be generated on the surface of the workpiece, thereby attracting the accumulation of magnetic powder at the defect where the magnetic powder is formed-magnetic marks, and under proper lighting conditions, the defect location and shape will appear , Observing and explaining the accumulation of these magnetic powders has achieved the purpose of eliminating defective products.