Assessing The Safety Of Magnetic Workholding

Resistance to the implementation of magnetic operate holding usually starts with a concern for security. These issues might be allayed by assessing the technologies, holding energy and optimal operating circumstances of magnetic perform holding with regards to operational security.

In spite of the competitive magnetic workholding advantages of magnetic workholding in lowering fees and enhancing productivity, there nonetheless exists a resistance to the implementation of magnetic technology as the main work holder in machining operations. This resistance usually begins using a concern for safety. By assessing the technologies, holding power and optimal operating circumstances of magnetic work holding relative to operational safety, these issues might be allayed.

Magnetic Work Holding as a Protected Technologies

If a machine operator has held workpieces with mechanical clamps for decades, the idea of relying on magnetism to hold workpieces, especially in heavy milling operations, boils down to an issue of trust: Is this genuinely safe? Though understandable this opinion is rooted in subjectivity not objective fact. Greater than probably, those that hold this point of view might not totally recognize the details of how safe magnetic operate holding is.

So, how can magnetic work holding be deemed as a secure technology? By definition, it produces a uniform, consistent, and infinite holding power that doesn't loosen up, give, or reduce until an operator de-energizes it.

Generally, magnetic perform holders are constructed with an array of person magnets embedded into a magnetic chuck or plate. Each magnet includes a north and south pole across which flows magnetic energy named flux. When a workpiece is placed across the poles of these magnets, flux flows into it. When placed in this flux field, a magnetic field of opposite polarity is induced in to the workpiece thereby generating a magnetic attraction involving the chuck and also the workpiece. This attraction will stay consistent, uniform, infinite, and dependable so long as the magnetic field is energized. This reliability tends to make magnetic workholding a truly secure technologies.

Magnetic Perform Holding as a Safe Holding Force

Holding power or strength is another element deemed when forming an opinion in regards to the safety of magnetic workholding. If an operator does not understand how robust magnetic workholding is, he may mistakenly believe magnetic technologies is not strong enough to complete the job safely. This opinion might be allayed by two information:

(1) magnetic workholding can possess a clamping energy as much as 1000 daN and

(two) based upon the application, an instantaneous clamping force of 12 tons per square foot may be generated by magnetic workholders. This amount of holding force is greater than comparable to mechanical clamps with 1 added benefit: magnetic holding force is uniform, constant and infinite until the operator de-energizes it.

Optimal Operating Circumstances

To implement magnetic work holding solutions might demand some instruction to know the technology's optimal operating conditions. One example is, magnetic perform holding is ideal utilized with smooth-surfaced workpieces instead of rough ones due to the fact the smoothness decreases the air gap among the workpiece as well as the magnet; smaller air gaps enhance magnetic attraction as well as the holding bond. Some supplies are far better conductors of magnetism than others. One example is, annealed components are best while hardened supplies don't absorb flux as quickly and will retain some magnetism. This situation can be corrected within seconds with demagnetization. Finally, the path of your holding force is but another adjustment an operator might have to make to safely implement magnetic work holding. All magnets have one hundred % clamping force directly away in the face of your magnet, but only about 20 % clamping force against side forces. So, the geometry of a cut should be regarded as within the machining approach to reap the advantages of this kind of workholding.