Roofing Bolts Inspection

 Roofing Bolts inspection is divided into two parts: manual and machine. Labor is the most primitive and most commonly used consistent detection method. To minimize the outflow of defective products, the general production enterprise personnel shall visually inspect the packaged or shipped products to eliminate defective products (badness including tooth injury, mixing, rust, etc.).
 Another way is automatic detection of the machine, mainly magnetic particle inspection.
 Magnetic particle inspection is the interaction between the leakage magnetic field and the magnetic powder at the defect of the Roofing Bolts. For the possible defects (such as cracks, slag inclusions, mixing materials, etc.) of the Roofing Bolts, the difference between the magnetic permeability and the magnetic permeability of the steel. After magnetization, these materials are magnetized. The magnetic field at the discontinuity will change, and a leakage magnetic field is generated on the surface of the workpiece at the partial flux leakage, thereby attracting the magnetic powder accumulation at the defect of the magnetic powder--magnetic trace, which shows the defect position and shape of appropriate illumination conditions. Observing and interpreting the accumulation of these magnetic powders has achieved the goal of eliminating defective products.