Assessing The Security Of Magnetic Workholding

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Revisión de 02:11 10 mar 2014

Resistance to the implementation of magnetic operate holding usually begins using a concern for security. These issues is often allayed by assessing the technology, holding energy and optimal operating conditions of magnetic function holding with regards to operational safety.

Despite the competitive http://www.pdqwh.com positive aspects of magnetic workholding in reducing costs and improving productivity, there nevertheless exists a resistance for the implementation of magnetic technology as the major operate holder in machining operations. This resistance usually begins with a concern for safety. By assessing the technology, holding power and optimal operating situations of magnetic operate holding relative to operational safety, these concerns could be allayed.

Magnetic Operate Holding as a Protected Technology

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 a problem of trust: Is this truly protected? Though understandable this opinion is rooted in subjectivity not objective truth. Greater than most likely, people who hold this point of view might not fully realize the information of how secure magnetic operate holding is.

So, how can magnetic perform holding be viewed as as a secure technologies? By definition, it produces a uniform, constant, and infinite holding power that will not loosen up, give, or reduce until an operator de-energizes it.

Normally, magnetic work holders are constructed with an array of person magnets embedded into a magnetic chuck or plate. Each and every magnet has a north and south pole across which flows magnetic energy called flux. When a workpiece is placed across the poles of those magnets, flux flows into it. When placed in this flux field, a magnetic field of opposite polarity is induced into the workpiece thereby generating a magnetic attraction between the chuck plus the workpiece. This attraction will stay constant, uniform, infinite, and reputable provided that the magnetic field is energized. This reliability makes magnetic workholding a definitely protected technology.

Magnetic Operate Holding as a Protected Holding Force

Holding energy or strength is a different aspect thought of when forming an opinion regarding the safety of magnetic workholding. If an operator doesn't know how sturdy magnetic workholding is, he may mistakenly believe magnetic technologies is just not robust enough to complete the job safely. This opinion might be allayed by two details:

(1) magnetic workholding can have 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 extra advantage: magnetic holding force is uniform, continual and infinite till the operator de-energizes it.

Optimal Operating Circumstances

To implement magnetic operate holding solutions may well call for some instruction to know the technology's optimal operating situations. For instance, magnetic function holding is ideal utilised with smooth-surfaced workpieces instead of rough ones because the smoothness decreases the air gap in between the workpiece plus the magnet; modest air gaps increase magnetic attraction and the holding bond. Some components are improved conductors of magnetism than other individuals. For example, annealed components are perfect whilst hardened materials do not absorb flux as conveniently and will retain some magnetism. This condition can be corrected inside seconds with demagnetization. Lastly, the path with the holding force is however one more adjustment an operator might have to produce to safely implement magnetic perform holding. All magnets have 100 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 must be regarded in the machining procedure to reap the advantages of this sort of workholding.