Assessing The Safety Of Magnetic Workholding

Izvor: KiWi

Resistance for the implementation of magnetic perform holding normally starts using a concern for safety. These concerns could be allayed by assessing the technology, holding energy and optimal operating circumstances of magnetic function holding when it comes to operational security.

In spite of the competitive magnetic workholding positive aspects of magnetic workholding in reducing charges and enhancing productivity, there nonetheless exists a resistance towards the implementation of magnetic technologies as the key operate holder in machining operations. This resistance usually begins using a concern for security. By assessing the technology, holding power and optimal operating circumstances of magnetic function holding relative to operational security, these issues may be allayed.

Magnetic Function Holding as a Secure Technology

If a machine operator has held workpieces with mechanical clamps for decades, the idea of relying on magnetism to hold workpieces, in particular in heavy milling operations, boils down to an issue of trust: Is this definitely safe? When understandable this opinion is rooted in subjectivity not objective truth. More than most likely, people who hold this point of view may not completely have an understanding of the facts of how protected magnetic work holding is.

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

In general, magnetic perform holders are constructed with an array of individual magnets embedded into a magnetic chuck or plate. Every magnet has a north and south pole across which flows magnetic energy named 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 in to the workpiece thereby making a magnetic attraction amongst the chuck and the workpiece. This attraction will remain constant, uniform, infinite, and reliable provided that the magnetic field is energized. This reliability makes magnetic workholding a actually safe technology.

Magnetic Function Holding as a Secure Holding Force

Holding energy or strength is a different issue regarded as when forming an opinion about the security of magnetic workholding. If an operator does not know how powerful magnetic workholding is, he may possibly mistakenly think magnetic technologies isn't sturdy adequate to complete the job safely. This opinion is usually allayed by two facts:

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

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

Optimal Operating Conditions

To implement magnetic perform holding solutions could demand some instruction to know the technology's optimal operating circumstances. For instance, magnetic function holding is greatest applied with smooth-surfaced workpieces instead of rough ones since the smoothness decreases the air gap amongst the workpiece as well as the magnet; small air gaps increase magnetic attraction and the holding bond. Some components are improved conductors of magnetism than other people. One example is, annealed materials are best although hardened supplies do not absorb flux as conveniently and will retain some magnetism. This condition is usually corrected within seconds with demagnetization. Finally, the direction of your holding force is yet yet another adjustment an operator may have to produce to safely implement magnetic perform holding. All magnets have one hundred percent clamping force straight away from the face of the magnet, but only about 20 % clamping force against side forces. So, the geometry of a cut has to be considered in the machining procedure to reap the benefits of this type of workholding.