Assessing The Security Of Magnetic Workholding

Izvor: KiWi

Inačica od 05:03, 10. ožujka 2014.

Resistance for the implementation of magnetic perform holding typically begins using a concern for security. These issues can be allayed by assessing the technology, holding power and optimal operating circumstances of magnetic function holding with regards to operational security.

In spite of the competitive Workholding added benefits of magnetic workholding in reducing charges and enhancing productivity, there nevertheless exists a resistance for the implementation of magnetic technology as the key work holder in machining operations. This resistance generally begins with a concern for safety. By assessing the technology, holding power and optimal operating situations of magnetic perform holding relative to operational security, these issues can be allayed.

Magnetic Function Holding as a Secure Technology

If a machine operator has held workpieces with mechanical clamps for decades, the concept of relying on magnetism to hold workpieces, specifically in heavy milling operations, boils down to an issue of trust: Is this seriously protected? When understandable this opinion is rooted in subjectivity not objective truth. Greater than most likely, those who hold this point of view might not fully fully grasp the information of how protected magnetic perform holding is.

So, how can magnetic work holding be viewed as as a protected technologies? By definition, it produces a uniform, constant, and infinite holding power that does not relax, give, or decrease until an operator de-energizes it.

In general, magnetic work holders are constructed with an array of person magnets embedded into a magnetic chuck or plate. Every magnet has a north and south pole across which flows magnetic energy referred to as flux. When a workpiece is placed across the poles of those magnets, flux flows into it. When placed within this flux field, a magnetic field of opposite polarity is induced into the workpiece thereby producing a magnetic attraction amongst the chuck and also the workpiece. This attraction will remain consistent, uniform, infinite, and trustworthy provided that the magnetic field is energized. This reliability tends to make magnetic workholding a actually protected technologies.

Magnetic Work Holding as a Protected Holding Force

Holding power or strength is a different element regarded as when forming an opinion regarding the safety of magnetic workholding. If an operator doesn't understand how robust magnetic workholding is, he may mistakenly think magnetic technologies is not powerful sufficient to accomplish the job safely. This opinion is usually allayed by two details:

(1) magnetic workholding can have a clamping energy up to 1000 daN and

(2) depending upon the application, an instantaneous clamping force of 12 tons per square foot is often generated by magnetic workholders. This amount of holding force is greater than comparable to mechanical clamps with 1 additional advantage: magnetic holding force is uniform, constant and infinite till the operator de-energizes it.

Optimal Operating Conditions

To implement magnetic function holding solutions may well need some training to understand the technology's optimal operating situations. By way of example, magnetic perform holding is very best utilized with smooth-surfaced workpieces as opposed to rough ones because the smoothness decreases the air gap among the workpiece and the magnet; compact air gaps increase magnetic attraction plus the holding bond. Some components are greater conductors of magnetism than other individuals. For instance, annealed materials are perfect although hardened components do not absorb flux as conveniently and will retain some magnetism. This situation is usually corrected within seconds with demagnetization. Ultimately, the path from the holding force is however another adjustment an operator may have to create to safely implement magnetic perform holding. All magnets have 100 percent clamping force straight away in the face from the magnet, but only about 20 percent clamping force against side forces. So, the geometry of a cut have to be regarded inside the machining procedure to reap the benefits of this kind of workholding.