Overview
Mattel CDX-III Multifunctional Magnetic Particle Testing Equipment is based on the principle of magnetic interaction between leakage magnetic field and magnetic particles, which can accurately and intuitively display the shape, location, size and severity of defects, and determine the nature of defects. Equipped with A, D, E, O four Probes, the instrument realizes four flaw detection functions of magnetic clamp type, electromagnetic yoke, cross yoke and ring type. It uses a variety of magnetization methods to detect various parts of the workpiece. It is widely used in defect detection in petroleum, chemical industry, metallurgy, shipbuilding, aviation, railway and other fields. It is a professional precision instrument for quality control, in-service safety monitoring and life evaluation.
Features
1. Apply new power mode to improve defect detection depth and surface detection sensitivity performance;
2. Adjustable yoke spacing to enhance the practicality of the instrument.
3. With power-on lighting function, it is convenient to use under the condition of insufficient rays of light;
4. Equipped with four optional magnetic Probe devices to enhance the adaptability and accuracy of the measurement of different shapes of workpieces;
5. Using a variety of magnetization methods, it is almost unrestricted by part size and geometry, and can detect various parts of the workpiece.
6. Adopting ergonomic design and using thyristor as the magnetizing switch, it is convenient to control the magnetizing switch at any time when holding the Probe;
7. Fast inspection and flaw detection, simple process and low cost.
8. It can detect defects under the surface of 0.5-3 mm workpiece, and the detection depth can reach 5 mm when DC magnetization;
9. With high detection sensitivity, magnetic particles gather on the defect to form magnetic marks with amplification, and can detect a minimum width of 0.1 microns.
Principle
The ferromagnetic material object to be tested is placed in a strong magnetic field or magnetized by a strong current. If there are defects (such as crazing, folding, inclusions, etc.) on or near the surface of the object, magnetic lines of force will produce magnetic leakage near these defects. When magnetic particles (usually magnetic oxidation iron powder) with good magnetic conductivity are applied, the leakage magnetic field near the defect attracts the magnetic particles, and piles up to form visible magnetic particle traces, forming visible magnetic marks under suitable lighting, thereby showing the location, size, shape and severity of the defect.
Applications
Electric power, oil field, coal mine, chemical industry, railway, automobile, steel structure equipment and other industry products; specific workpiece types include chain rods, crankshafts, bearings, high-strength bolts, springs, forgings, petrochemical pipe fittings, valves, blades, gears, anchor chains and welds and other geometrically complex workpieces.
Steps
1. Place the ferromagnetic material object to be tested in a strong magnetic field or magnetize it with a strong current.
2. Apply magnetic particles (usually magnetic oxidation iron powder) with good magnetic conductivity to the object;
3. Observe the visible magnetic marks formed by the leakage magnetic field attracting magnetic particles near the defect;
4. Analyze the magnetic trace under appropriate lighting to reveal the location, size, shape, and severity of the defect.
Notice
• Ensure that the operating voltage is AC 220V and the Operating Current is 5A to avoid overload use;
• Check that the temperature rise of the Probe does not exceed 60 ° C before use to prevent overheating damage;
• When operating, pay attention to the yoke pole distance adjustment range of 20-160mm to adapt to different workpieces;
• Under the condition of insufficient rays of light, use the power-on lighting function to assist detection;
• Regularly calibrate the instrument to ensure that the Comprehensive Sensitivity meets the requirements of the Type A 30/100 standard specimen;
• Avoid long-term use in humid or corrosive environments to prolong the life of the instrument;
• Clean Probe and host in time after detection to prevent magnetic particle residue from affecting subsequent use.
