Yes
I don’t know much about the model of magnetic particle flaw detection machine. You can contact the manufacturer directly to make sure. I only know the principles and process of magnetic flaw detection. I hope I can help you. Magnetic particle testing has certain limitations. It can only detect cracks that intersect with magnetic lines of force. If the crack direction is just right. It is difficult to detect if it is in the same direction as the magnetic lines of force, and internal cracks cannot be detected. First of all, the crankshaft needs to be magnetized first, that is, a current is passed between the two electrodes, so that under the action of the crankshaft as an electromagnet, the crankshaft has a certain There is residual magnetism. At the same time, when current is passed, some kerosene mixed with magnetic powder with fluorescent properties will be sprayed onto the crankshaft. It must be sprayed evenly. The magnetic powder will be adsorbed on the crankshaft, and then directly placed under a lamp in a dark room environment. Observing the uniformity of magnetic powder under ultraviolet light is actually looking at the uniformity of fluorescence, because these magnetic powders have fluorescent properties and will emit fluorescence under ultraviolet irradiation. If the fluorescence is uniform, there are no cracks. If there are cracks, the cracks will destroy the continuity of the magnetic field lines on the crankshaft, and two magnetic poles will be formed at the cracks. The magnetic force of these two magnetic poles is particularly strong. This principle is the same as that of a bar magnet. The magnetism in the middle is very uniform and not very strong, but if it is interrupted in the middle, two magnetic poles will be formed. The strength of these two magnetic poles is much stronger than before. The strong magnetic field generated by this crack will absorb a large amount of magnetic powder, which looks very bright under fluorescent lights, that is, the crack will be particularly bright, that is, a crack-shaped bright strip appears in the uniform fluorescence of the crankshaft, which is a crack. Generally, the magnetic field lines after the crankshaft is magnetized are held by hand around the axis. The direction of your fingers is the direction of the magnetic field lines. The cracks are most obvious when they are perpendicular to the magnetic field lines, that is, the most obvious crack detection accuracy is along the axial direction. , if the crack is in the same direction as the magnetic field lines, the sensitivity will be very low, because this crack will not destroy the continuity of the magnetic field lines at all, and will not form a strong magnetic pole.