All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
(889 products available)
Demagnetizers are of various types. As such, tunnel-type demagnetizers are distinct because of their machine construction and application.
Tunnel-type demagnetizers with stationary coils
The stationary coil tunnel-type demagnetizers are equipped with permanent or electromagnets that remain fixed while the item to be demagnetized passes through the tunnel. These machines were designed with production lines in mind, where a constant flow of materials, like small parts or tools, needs to be demagnetized quickly and efficiently.
Rotating coil demagnetizers
As their name suggests, the rotating coil demagnetizers have coils mounted on a rotating drum. This design allows the coils to change positions as the drum rotates. The coils move and transfer demagnetizing currents to objects placed within their reach. The machine's rotating action creates a dynamic field that effectively counters magnetization in the object.
Linear demagnetizers with pulsed current
These machines generate pulsed currents that travel along the length of the device. When an object is placed between the coils, the pulsed current quickly alternates, effectively demagnetizing any magnetic fields in the object. People use linear tunnel-type demagnetizers with pulsed current in situations that require high precision and efficiency.
High-frequency demagnetizers
High-frequency tunnel-type demagnetizers operate on much higher frequencies than standard demagnetizers. Their coil configurations are designed to create rapidly oscillating magnetic fields. This feature allows for demagnetization in objects that are more resistant to lower frequencies, such as steel alloys. People use these demagnetizers in settings where they need to effectively demagnetize components with specific alloying.
Various tunnel-type demagnetizer parts are made of several materials. All the machine materials impact performance, durability, and application suitability.
Electromagnet wire
The wire used to make electromagnets in tunnel-type demagnetizers must have high conductivity and resistance to heat. Copper is commonly used because of its excellent conductivity. Since demagnetizers generate considerable heat during operation, the copper wire must be carefully designed with a thermally conductive insulating layer to dissipate heat and maintain functionality when working under strenuous conditions.
Magnetic cores
The core of the electromagnet enhances the magnetic field created by the wire. Manufacturers make them using ferromagnetic materials like silicon steel. This material standard improves the efficiency of the magnetic field by concentrating it. In other words, this feature reduces energy losses due to demagnetization.
Coil housing
Electric coils are mounted on metal casings or housings, providing structural support and protecting the sensitive components inside. Manufacturers use sheets of steel or aluminum to make these housings. Aluminum is lightweight and rust-resistant, while steel boasts high durability and strength.
Control components
The main control elements, such as switches and relays, are essential for the safe and efficient operation of the machine. These components are usually made of materials such as brass and copper. These materials ensure good electrical connectivity. They also have high corrosion resistance. This makes them ideal for manufacturing machines in settings with harsh operating conditions.
Base frame materials
Tunnel-type demagnetizers normally feature a base frame that supports the entire system. Steel or reinforced metal is commonly used to make these frames. The strong material provides stability and ensures the machine can withstand continuous heavy usage without succumbing to wear and tear.
Tunnel-type demagnetizers are vital in commercial and industrial applications because of their ability to remove unwanted magnetism from metal objects. Their versatility and efficiency make them indispensable across various industries.
Automotive industry
Manufacturers use demagnetizers to clean their metal components in the auto manufacturing process. The machines ensure engine parts, gears, and bearings are magnetically clean. This feature improves the assembly fit and reduces wear during operation.
Aerospace industry
The aerospace industry employs demagnetizers to treat critical aircraft components. Exposure to strong magnetic fields can cause electronic malfunctions in this industry. That is why aerospace manufacturers use tunnel-type demagnetizers to prevent such magnetic interference. They ensure sensors, wiring, and other electronic devices operate as required.
Electronic manufacturing industry
The electronic manufacturing industry relies on tunnel-type demagnetizers to protect sensitive components. These machines prevent residual magnetism from damaging electronic circuits, thereby ensuring the devices operate correctly and increasing the electronic equipment's serviceability and reliability.
Medical equipment industry
The medical equipment industry depends on tunnel-type demagnetizers to maintain the accuracy and reliability of precision instruments. These machines, which are vital for maintaining the equipment's lifespan, are primarily used to treat magnetic materials in MRI machines and other medical gadgets. That way, the machines experience reduced magnetic interference, which is critical for accurate diagnostics.
Metalworking industry
As stated earlier, metal cutting tools often retain a small magnetic charge after production. To make metal cutting tools fully effective, manufacturers use tunnel-type demagnetizers to eliminate this remanence magnetism. It helps improve precision and tool longevity. They also use demagnetizers in the metalworking industry to prevent magnetism from affecting jigs, fixtures, and workpieces. Such unwanted magnetism can lead to clamping issues and inconsistent machining results.
People use various ways to maintain and clean demagnetizers to ensure they provide optimal performance and a longer life for users’ tunnel-type demagnetizers.
Regular inspection
Buyers need to inspect the coils, frames, and electrical components for wear and tear regularly. They should also check for signs of damage, such as frayed wires or worn bearings. It is essential to check the insulation on the coil wire for signs of wear or damage. It is also important to ensure that coils are free of debris and have no dust accumulation. It is also advisable to inspect electrical components like switches and relays for signs of corrosion.
Lubrication
Demagnetizers have mechanical parts that require lubrication. They should apply manufacturers’ recommended lubricant to moving parts like rotating coils or friction surfaces. Note that over-lubrication can accumulate dirt and dust, so there should be a balance.
Cooling maintenance
Cool systems regularly to prevent overheating. They should check that airflow around the coils and frame is unobstructed. This is crucial since demagnetizers generate a lot of heat, especially during heavy use. Additionally, cleaning fans and vents helps ensure efficient cooling.
Electrical checks
Buyers should check electrical connections like terminals and wires for signs of corrosion or looseness. They should ensure all connections are tight and free from rust. They should also inspect the power supply for consistent voltage and check for any fluctuations.
Calibration
To guarantee optimal demagnetization results, people should calibrate their tunnel-type demagnetizers per the manufacturer guidelines. Buyers should always follow calibration steps in the user manual. If they cannot find it, they can always consult a professional to avoid mishaps that may lead to the machine’s impairment.
The demagnetizers that users select depend on various factors. These factors are based on the specifications of the machines, the industry in which they will be used, and the costs of the machines.
Machine specifications
Machine specifications mainly involve the tunnel dimensions. Users need to select machines whose tunnel size accommodates the maximum-sized workpiece. They should also consider the materials used for the coils. Generally, demagnetizers with copper coils have better electrical conductivity than those with copper clads. This offers greater efficiency. Additionally, buyers should consider the magnetic field strength and rate of decrease. The machines have powerful magnetic fields that can penetrate dense materials. They should also ensure the machine has a variable frequency control feature. It will enable them to adjust the demagnetization according to the workpiece's requirements.
Industrial application
Demagnetizers for the auto and aerospace industries should be heavy-duty to withstand strenuous chores. Those for the medical or electronic industries should have a low magnetic field intensity to avoid damaging sensitive components. Manufacturers will usually offer tunnel-type demagnetizers specifically designed for certain industries. This is to ensure they meet the requirements of those industries.
Cost
Buyers should consider the price of the demagnetizers manufacturers are selling to them. Moreover, they should weigh the cost against the benefits they will derive from the machine. For instance, businesses that require high capacity and precision should invest in more expensive machines. Conversely, buyers with less demanding tasks can opt for budget-friendly machines.
Maintenance
To increase the longevity of the machine and reduce the overall cost, buyers should examine the maintenance requirements of the machines they intend to purchase. They should also consider the warranty offered by the manufacturers. A reasonable warranty gives a user peace of mind and protects them from unexpected repair costs.
A1. No, but there are demagnetizers that can effectively demagnetize almost any metal. Such demagnetizers have adjustable magnetic field strengths, allowing them to cater to various metal densities. There are also demagnetizers specifically designed for certain metal types. These machines are meant for specific industries, such as auto or electronic manufacturing. That is why users should consider what type of metal their demagnetizers will be servicing before purchasing one. This will help them avoid disappointment.
A2. Yes, there are other ways. In addition to regular cleaning, there are other maintenance ways to ensure the machine is in good condition. Buyers should inspect their machines, lubricate parts, check electrical connections, calibrate, and ensure proper cooling.
A3. Workers in harsh working environments do not necessarily need machines with stronger magnetic forces. They, however, need durable machines that can withstand the difficult environment. It is worth noting that magnetic strength depends on the type of material being demagnetized and not the operating environment.
