News Center





Special Headed Bolt YZP tells how to detect bolts?

A bolt is a type of fastener consisting of a head and a screw (cylinder with external threads). It needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection. So do you know how to detect it? Let’s follow the Special Headed Bolt YZP editor to have a brief look at it!

Bolt inspection is divided into two types: manual and machine. Manual is relatively primitive and uses a more common 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 mixing, rust, etc.).
The other method is automatic machine inspection, mainly magnetic particle inspection. Magnetic particle inspection is based on the interaction between the leakage magnetic field at the bolt defect and the magnetic powder, aiming at the difference between the magnetic permeability of the bolts (such as cracks, slag inclusions, mixing, etc.) and the magnetic permeability of steel. These materials are discontinuous after magnetization. The magnetic field at the location 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-the magnetic mark. Under proper lighting conditions, the defect position and shape will appear. The accumulation of these magnetic powders is observed and explained, and the purpose of rejecting defective products has been achieved.
In summary, the editor of Special Headed Bolt YZP tells: about bolt detection methods, I hope you can learn more.