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YC series miniature magnetic yoke flaw detector
YC series miniature magnetic yoke flaw detector
Product details
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YC series miniature magnetic yoke flaw detector
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☆ Measurement range: 50~200mm
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☆ Operating frequency:> 5.5kg
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☆ Detection accuracy: 3.2
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☆ Indication error: 1
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Product Introduction
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1、 OverviewThe YC series miniature magnetic yoke flaw detector is a lightweight and miniature magnetic particle flaw detection equipment that uses a magnetic yoke to magnetize workpieces made of ferromagnetic materials. It can magnetize various parts and is suitable for industries such as oil fields, shipbuilding, internal combustion engine parts, coal mines, machinery, standard parts, oil pumps and nozzles, aircraft manufacturing, automotive parts, bridge construction, chemical industry, boiler pressure vessels, railways, etc. Surface and near surface defects caused by forging, quenching, welding, fatigue, etc., such as chain rods, crankshafts, bearings, high-strength bolts, springs, forgings, petrochemical pipe fittings, valves, blades, gears, rollers, anchor chains, and welds, which have complex geometric shapes.
The YC series miniature magnetic yoke flaw detector has AC, DC, and AC/DC dual-use magnetic particle flaw detectors. The DC power supply is rechargeable batteries, suitable for field operations without power supply and on-site operations in containers, bridges, pipelines, etc. where high voltage cannot enter. The continuous working time of one charge can reach more than 6 hours. The AC power supply adopts a~220V power supply for direct input, without the need for other instruments to be matched. It is easy to operate, simple, lightweight, and portable, so this instrument is widely used.
II technical parameter
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Model number classification |
YC—12/220 AC and DC |
YC—12 direct |
YC—220 communication |
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| Power supply |
~220V50Hz –12V |
–12V | ~220V50Hz | |
| Charging power supply | 220V 50Hz | 220V 50Hz | ||
| Using batteries | MF12—7.2H | MF12—7.2H | ||
| Working current |
AC1.5A DC2.0A |
DC2.0A | AC1.5A | |
| Charging time | 8~15h | 8~15h | ||
| Battery usage time | More than 5 hours | More than 5 hours | ||
| Work gap time | 1 second on, 2 seconds off | |||
| Magnetic Pole Distance | 50~200mm | 50~200mm | 50~200mm | |
| Boosting power | A C | >5.5kg | >5.5kg | |
| D C | >22kg | >22kg | ||
| weight | probe | 3.2kg | 3.2kg | 3.2 kg |
| Battery Pack | 2.9kg | 2.9kg | ||
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appearance Size (mm) |
probe | 208×52×146 | 208×52×146 | 208×52×146 |
| Battery Pack | 160×100×70 | 160×100×70 | ||
| Charger | 80×60×40 | 80×60×40 | ||
3、 Principles and Applications
1. Charging (charger, battery for YC-12/220, YC-12 use)
Connect the~220V power supply to the charger and connect it to the battery box plug. When charging, the charger's LED emits a red light, indicating that the battery is in the "fast charging" state. When the LED turns green, the battery reaches above 14 volts. If the battery is charged without consuming much, it may start with a period of time before turning from red to green and entering a "slow charging" state. Enter the slow charging charger to continue charging the battery, but the total charging time should not exceed 15 hours.
Note: Explanation of the improved charger.
2. Battery
The battery is the power supply for the probe. After starting to work, due to the continuous discharge of the battery, the lifting force will significantly decrease when under voltage (after 6 hours), and the battery needs to be charged.
3. Flaw detection
A：DC flaw detection (used for YC-12/220 YC-12)
⑴ Connect the plug of the probe wire to the battery plug, and the battery will supply power to the probe.
⑵ During flaw detection, place the probe joint plane on the inspected workpiece and maintain good contact.
⑶ Press the probe switch and spray magnetic powder or magnetic suspension onto the inspected area for 2-3 seconds.
⑷ Release the probe switch, move the probe away, and observe the workpiece.
⑸ Move the probe to another inspection area and repeat steps 3 and 4.
BCommunication Inspection (Used for YC-12/220 YC-220)
⑴ Insert the power input plug into a socket with a grounding wire to ensure good contact of the grounding wire.
⑵ When conducting flaw detection, refer to DC flaw detection methods 3, 4, and 5.
4、 Maintenance and precautions:
1. When charging the charger, the charging time should not exceed 15 hours each time. After charging, the charger plug and battery plug should be removed to avoid power backflow.
2. When the battery is under voltage, charge it as soon as possible to protect its good storage performance.
3. When the instrument is not used for a long time, the battery should be charged every 2-3 months to avoid battery discharge and affect the battery's service life and continuous working time.
4. When the probe is working, the power on time is generally 2-3 seconds, and the longest should not exceed 5 seconds, with an interval of 3-5 seconds.
5. When using water-based magnetic suspension, an appropriate amount of rust inhibitor should be added.
6. Before using the probe, add an appropriate amount of oil to lubricate the active joint. After use, wipe off any water, oil, magnetic particles, etc. on the probe and active joint, and apply rust proof oil.
7. When using AC flaw detection, the power supply inserted must comply with the instrument's specified power supply and have good grounding.
8. When in use, the movement of the probe should be carried out after releasing the probe switch to avoid open circuit operation and instrument heating.
9. If the flaw detector is powered on for a long time and there is obvious heating, it should be rested appropriately before being put back into use.
10. Do not use blindly, do not approach high temperature and high humidity places. Do not work in the rain, and do not spray magnetic suspension onto switches or plug sockets.
11. 1/0 switch function: 0 gear for 220V power supply, 1 gear for 12V DC power supply.
5、 Instrument completeness
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model classification |
YC—12/220 AC and DC |
YC—12 direct |
YC—220 communication |
| Probe | 1 unit | 1 unit | 1 unit |
| Battery Pack | 1 piece | 1 piece | |
| Battery | 1 piece | 1 piece | |
| Charger | 1 piece | 1 piece | |
| power cord | 1 piece | 1 piece | |
| Surrounding line | 1 piece | 1 piece | |
| an instruction manual | 1 copy | 1 copy | 1 copy |
| certificate | 1 copy | 1 copy | 1 copy |
VIThe principle of magnetic particle inspection
Magnetic particle testing, also known as MT or MPT (Magnetic Particle Testing), is a testing method suitable for detecting near the surface of magnetic materials such as steel. Use the principle of iron being attracted by magnets for inspection. When conducting magnetic particle inspection, the tested object is subjected to magnetic force, which disperses magnetic powder (magnetic micro powder) on its surface. Then, the leaked magnetic force on the surface of the defective part will attract the magnetic powder and form an indicator pattern. The indication pattern is tens of times larger than the actual defect, making it easy to identify the defect.
Magnetic particle inspection method
The sequence of magnetic particle inspection is divided into pre-processing, magnetization, magnetic particle use, observation, and post-processing.
Pre processing → Magnetization → Use of Magnetic Powder → Observation → Post processing
Below are summaries of each step.
(1) Pre processing
If there is grease, paint, rust, or other foreign matter adhering to the inspection surface, it will not only hinder the magnetic powder from adsorbing on the scar, but also cause the magnetic powder to adsorb on the parts outside the scar, forming suspicious images. Therefore, before magnetization, physical or chemical treatment should be used to remove dirt and foreign objects.
(2) Magnetization
It is very important to magnetize the test substance appropriately. Usually, a magnetization method perpendicular to the direction of the scar and the magnetic field lines is used. In addition, for appropriate magnetization, various methods can be used according to the shape of the detected substance. The Japanese Industrial Standards (JIS G 0565-1992) specify the following seven magnetization methods.
① Axial current method... directly passes current in the direction of the detected object's axis.
② Right angle current method... directly passes current through the direction perpendicular to the axis of the detected object.
③ProdMethod... Place two electrodes (called Prod) locally on the test object and pass current through them.
④ Current penetration method... passing current through a conductive material passing through the hole of the test substance.
⑤ Coil method... Place a coil in the test object and pass current through the coil.
⑥ Pole to pole method... Place the test substance or the part to be tested between the magnetic poles of an electromagnetic stone or permanent magnet.
⑦ Magnetic field line penetration method... applies alternating magnetic field lines to a strongly magnetic object passing through the hole of the detection object, causing induced current to pass through the detection object.
(3) The principle of magnetic particle inspection using magnetic powder
① Types of magnetic powder
In order for the magnetic powder to adsorb between the magnetic poles of the scar area and form a detection image, the magnetic powder used must be easily magnetized by the weak magnetic field of the scar area and adsorb onto the magnetic poles, which means excellent adsorption performance is required. In addition, the required magnetic particle image must have high recognizability.
Generally, the magnetic powders used in magnetic particle inspection include white, black, red, and other types used under visible light, as well as fluorescent magnetic powders that use fluorescent luminescence. In addition, depending on the application of magnetic powder, there are dry powder magnetic powder and wet powder dispersed in water or oil.
② The usage time of magnetic powder
The use time of magnetic powder is divided into two methods: continuous method of using magnetic powder while passing through the magnetizing current, and residual method of using the residual magnetic force of the test substance in the state of cutting off the magnetizing current.
(4) Observation
In order to facilitate the observation of magnetic powder images attached to the wound site, an easily observable environment must be created. Ordinary magnetic powder needs to be observed in a bright environment as much as possible, while fluorescent magnetic powder requires the use of ultraviolet lamps to darken the surrounding area as much as possible for easy observation.
(5) Post processing
Magnetic particle inspection is completed, and the tested material may still be used as a product or need to be sent to the next processing step for mechanical processing. At this point, post-processing such as demagnetization, removal of magnetic particles, and rust prevention treatment are required.
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