Vega Technik GmbH | Magneti Austria Villach | materiali e prodotti magnetici | assemblati meccanici e sistemi elettronici

Technical Support for Permanent magnets

CONSULTING AND ASSISTANCE SERVICESt

Our laboratory offers all the technical support necessary for the needs of our customers, to answer any questions regarding the design of magnetic applications, the analysis of finished elements.

We are equipped with digital flow meters, hysteresograph, magnetizers etc.

We are able to control your magnets, provide you with all the technical information about them and offer solutions in step with the latest innovations in the field of magnetic materials.

FLUXOMETER AND HELMHOLTZ COIL

Measurement of magnetic values is mostly due to the measurement of magnetic flux. Therefore the flow meter is the most versatile measuring instrument. The flow meter is operated together with a measuring coil called Helmholtz coil.

HISTERESIGRAPH

Measuring the characteristics of magnetic materials is the most critical part in evaluating a permanent magnet for both the materials manufacturer and the end user. Our quality department, thanks to the equipment provided, is able to verify and guarantee the magnetic characteristics of the materials supplied.
Vegatechnik´s hysteresigraph measures the magnetic characteristics of the material such as the magnetic remainence, the coercivity and the value of total energy expressed by individual magnets. In this way we can be sure that the values of the magnetic characteristics expressed for each material are included in the specific requests.

MAGNETIZER

Vegatechnik offers a magnetization service to its partners. The magnetizers provide the right amount of energy to produce the desired current in the magnetization device. The fundamental operation of a magnetizer is to charge and store energy until the magnetization process starts. When it does, the power circuit is closed on the coil and the energy is then discharged into the coil.

DIGITAL GAUSSOMETER

The Handgaussmeter is an easy to use precision instrument. The superfine probe can measure magnetic flux density extremely close to the magnetic pole and in very narrow air gaps.

Magnetic field mapping

Magnetic Field Mappers measure the magnetic field of permanent magnets and electromagnets using 3-axis Hall probes. The Mapper software provides real-time analysis and visualization of measured magnetic field data, generates a 3D map of the magnetic field, counts the number of poles, calculates pole width for magnets and multipole rotors, detects zero crossings, measures magnetic angle, angular error and field homogeneity, provides GOOD/BAD decisions, detects cracks in magnets and non-magnetized blanks.

SAFETY WARNINGS

Magnets: warnings for an appropriate use

INGESTION

Children can ingest small magnets. In the event that several magnets are ingested, they can stop in the intestine and cause even fatal injuries. Magnets are not toys! Make sure they don't end up in children's hands.

ELECTRIC CONDUCTIVITY

Magnets are made of metal and conduct electricity. Children could try to insert the magnets into a power outlet, thus taking the shock. Magnets are not toys! Make sure they don't end up in children's hands.

CONTUSIONS

The larger magnets have a remarkable attraction force. • If you handle the magnets carelessly, your fingers or skin can get caught between two magnets. This can cause bruising and bruising in the affected parts. • Very large magnets, with their power, can cause fractures. To handle the larger magnets, use thick protective gloves.

PACEMAKER

Magnets can affect the functioning of implanted pacemakers and defibrillators. • A pacemaker may automatically switch to test mode and cause an illness. • A defibrillator may also stop working. • If you wear one of these devices, keep a safe distance from the magnets. • Warn the wearers of these devices not to approach the magnets.

HEAVY OBJECTS

Excessive or sudden loads, aging or defects in the material can cause a magnet or magnetic hook to detach from the support surface. Falling objects can cause serious injury. • The indicated attraction force is only achieved under ideal conditions. Expect a large margin of safety. • Do not use magnets in places where failure of materials can cause personal injury.

METAL TABS

Neodymium magnets are fragile. If two magnets collide they can chip. Pointed splinters can be projected several meters away and injure the eyes. • Avoid collisions between magnets. • To handle larger magnets, use protective goggles. • Make sure that people around you are equally protected or keep a safe distance.

MAGNETIC FIELD

Magnets generate an extended and powerful magnetic field. They can damage televisions and laptops, credit and debit cards, computer media, mechanical watches, hearing aids, speakers and other devices. • Keep magnets away from all appliances and objects that could be damaged by intense magnetic fields.

FLAMMABILITY

The drilling dust that is formed during the mechanical processing of the magnets is highly flammable. Avoid working the magnets or use suitable tools and plenty of cooling water.

NICKEL ALLERGY

Most of our magnets contain nickel, even those without a nickel coating. • Some people develop an allergic reaction on contact with nickel. • Nickel allergies can develop after prolonged contact with objects that contain nickel. • Avoid prolonged skin contact with magnets. • Avoid contact with magnets if you already have a nickel allergy.

AIR TRANSPORTATION

Magnetic fields generated by inadequately packaged magnets can affect aircraft navigation devices. In the worst case, this could result in an accident. • Ship magnets by air transport only in packaging that has sufficient magnetic shielding.

EFFECT ON PEOPLE

According to our current knowledge, the magnetic fields of permanent magnets have no measurable effect, positive or negative, on people. The magnetic field of a permanent magnet is unlikely to constitute a health hazard, but this risk cannot be entirely excluded. • For safety, avoid prolonged contact with the magnets. • Keep the larger magnets at least one meter away from your body.

COATING CRUSHING

Most of our neodymium magnets have a thin nickel-copper-nickel coating to protect them from corrosion. The coating can chip or crack as a result of collisions or strong pressure. This makes the magnets more exposed to environmental influences, such as humidity, so much so that the magnets can oxidize. • Separate the larger magnets, especially the spheres, using a piece of cardboard. • In general, avoid collisions between the magnets as well as repeated mechanical impacts (eg blows).

OXIDATION, CORROSION, RUST

Untreated neodymium magnets oxidize very quickly and then crumble. Most of our magnets have a thin nickel-copper-nickel coating to protect them from corrosion. The coating offers some corrosion protection, but is not strong enough for the use of magnets in outdoor environments for long periods. • Use the magnets only indoors that are not exposed to moisture or protect the magnets from environmental influences. • Avoid abrasion of the coating.

HEAT RESISTENCE

Neodymium magnets have a maximum operating temperature of 80 to 200 ° C. Most neodymium magnets permanently lose part of their attraction force at a temperature above 80 ° C. • Do not use magnets in places where they may be exposed to high temperatures. • If you use glue, do not use hot air to harden it.

MACHINING

Neodymium magnets are fragile, heat sensitive and highly oxidizable. • After piercing or cutting a magnet with an unsuitable tool, the magnet can break. • The resulting heat can cause the magnet to degauss. • Once the coating has been damaged, the magnet will oxidize and then crumble. Avoid mechanical machining of magnets if you do not have suitable tools and if you do not have the necessary experience.

FAQs

MAGNET SERVICE

Do permanent magnets lose their strength over time?

Modern magnetic materials lose a very small part of their magnetism over time. For example, for samarium cobalt materials, this has proven to be less than 1% over a ten-year period. Some materials may lose their magnetic capabilities if subjected to high temperatures or magnetic fluxes. In this case Vegatechni provides a verification service to check for any loss of magnetization and return the magnet to its state of saturation.

What could affect the strength of a magnet?

Factors that can influence the strength of a magnet:

Heat
Radiations
Strong electric currents near the magnet
Other magnets near the magnet

Bumps and vibrations do not affect modern magnetic materials, unless they are sufficient to physically damage the material.

How do you measure the strength or power of a magnet?

Most commonly, Gaussmeters, Magnetometers or Pull-Tester are used to measure the strength of a magnet. The Gaussmeters measure the force in Gauss, the Magnetometers measure in Gauss or arbitrary units (so it is easy to compare one magnet with another) and the Pull-Tester can measure the pull in pounds, kilograms or other force units.

Can a particular pole be esily identified?

Yes, the North or South Pole of a magnet can be marked if specified. It is relatively easy to identify the poles of a magnet. First of all, the quickest method is to use another magnet already marked. The north pole of the marked magnet will be attracted by the south pole of the unmarked magnet. Secondly, it is possible to use an even number of magnets and pinch a string in the middle of the stack and dangle the magnets so that they can rotate freely on the string.
The north pole of the magnets will settle pointing north. This result contradicts the common theory that opposites attract when discussing the rules of magnetism. However, the naming convention of the poles is a historical surplus from the moment when the poles were called research poles of the North or Southern research. Finally, you can use a compass to identify the poles. The tip of the needle that normally points north will be attracted to the south pole of the magnet.
We also have a magnetic pole indicator device to quickly determine the polarity of the magnets. This magnetic pole tester provides an instant magnetic indication of the zero-delay pole. Just press the button to activate and the tester will indicate the appropriate magnetic pole using LEDs simultaneously. "