Assessing The Safety Of Magnetic Workholding

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Resistance to the implementation of magnetic work holding generally begins using a concern for security. These concerns can be allayed by assessing the technology, holding energy and optimal operating situations of magnetic work holding when it comes to operational safety.

In spite of the competitive Workholding Fixtures added benefits of magnetic workholding in reducing costs and enhancing productivity, there nonetheless exists a resistance to the implementation of magnetic technology as the primary perform holder in machining operations. This resistance typically begins with a concern for security. By assessing the technologies, holding power and optimal operating situations of magnetic work holding relative to operational safety, these concerns could be allayed.

Magnetic Perform Holding as a Secure Technologies

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 definitely safe? While understandable this opinion is rooted in subjectivity not objective fact. Greater than likely, people who hold this point of view may not completely comprehend the details of how secure magnetic work holding is.

So, how can magnetic operate holding be considered as a secure technology? By definition, it produces a uniform, consistent, and infinite holding energy that doesn't relax, give, or decrease until an operator de-energizes it.

Generally, magnetic operate holders are constructed with an array of person magnets embedded into a magnetic chuck or plate. Every single 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 into the workpiece thereby developing a magnetic attraction among the chuck and the workpiece. This attraction will stay constant, uniform, infinite, and reputable as long as the magnetic field is energized. This reliability tends to make magnetic workholding a really secure technologies.

Magnetic Function Holding as a Secure Holding Force

Holding energy or strength is yet another aspect considered when forming an opinion about the security of magnetic workholding. If an operator will not know how strong magnetic workholding is, he may well mistakenly think magnetic technologies is not sturdy enough to perform the job safely. This opinion can be allayed by two facts:

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

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

Optimal Operating Conditions

To implement magnetic work holding solutions may well demand some coaching to understand the technology's optimal operating situations. As an example, magnetic function holding is most effective applied with smooth-surfaced workpieces as an alternative to rough ones because the smoothness decreases the air gap among the workpiece as well as the magnet; smaller air gaps raise magnetic attraction along with the holding bond. Some materials are far better conductors of magnetism than other folks. One example is, annealed materials are ideal although hardened supplies don't absorb flux as very easily and can retain some magnetism. This condition can be corrected within seconds with demagnetization. Lastly, the direction with the holding force is yet one more adjustment an operator may have to produce to safely implement magnetic function holding. All magnets have 100 percent clamping force directly away in the face with the magnet, but only about 20 % clamping force against side forces. So, the geometry of a cut should be regarded in the machining process to reap the benefits of this type of workholding.