For semi-automatic wet magnetic particle inspection equipment controlled by microcomputers, suitable for magnetic particle inspection of annular ferromagnetic parts such as flanges and similar shapes. It uses a programmable logic controller (PLC) as its core to control the mechanical movement program of the system, capable of completing the entire magnetic particle inspection process according to the prescribed program, excluding manual observation of defects. It can be operated automatically or manually step by step. Circumferential magnetization is achieved using the rod-through method, while longitudinal magnetization uses coil induction to magnetize the workpiece with alternating composite magnetization, thereby avoiding workpiece burnishing. The silicon-controlled rectifier triggering system developed by our factory features phase control during power interruption, preventing missed detection in alternating magnetization. As a result, a single magnetization can detect extremely minute defects on the surface and inside of the workpiece caused by material, forging, quenching, grinding, and fatigue, such as cracks and inclusions.
Process Flow
Loading Material — Feeding Material — Rod Insertion — Liquid Spraying Magnetic Composite — Rod Removal — Rotation and Observation — Feeding Material — Unloading Material
Key Technical Parameters
◇ Magnetic Current Through Rod: AC 0-4000A continuously adjustable, with power-off phase control function.
◇ Axial magnetization magnetic potential: AC 0-20000AT continuously adjustable, with power-off phase control function.
◇ Method of Rod Insertion: Pneumatic Rod Insertion
◇ Operation Mode: Automatic operation, manual step-by-step operation;
◇ Magnetization Method: circumferential magnetization, longitudinal magnetization, and composite magnetization.
◇ Inspection Speed: 8S per piece
◇ Sensitivity to Detection: Clear display on the workpiece surface with a D-type 7/50 test piece.