Assessing The Security Of Magnetic Workholding

De Wikillerato

Resistance to the implementation of magnetic function holding commonly begins using a concern for security. These concerns could be allayed by assessing the technologies, holding power and optimal operating conditions of magnetic work holding with regards to operational security.

Regardless of the competitive link advantages of magnetic workholding in decreasing costs and improving productivity, there still exists a resistance to the implementation of magnetic technologies as the major work holder in machining operations. This resistance commonly begins using a concern for safety. By assessing the technologies, holding power and optimal operating situations of magnetic perform holding relative to operational security, these concerns is often allayed.

Magnetic Work Holding as a Safe Technology

If a machine operator has held workpieces with mechanical clamps for decades, the concept of relying on magnetism to hold workpieces, in particular in heavy milling operations, boils down to a problem of trust: Is this definitely safe? Though understandable this opinion is rooted in subjectivity not objective truth. More than most likely, those who hold this point of view may not completely fully grasp the details of how safe magnetic perform holding is.

So, how can magnetic perform holding be thought of as a secure technology? By definition, it produces a uniform, constant, and infinite holding energy that doesn't relax, give, or reduce until an operator de-energizes it.

Generally, magnetic work holders are constructed with an array of person magnets embedded into a magnetic chuck or plate. Every single 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 within this flux field, a magnetic field of opposite polarity is induced into the workpiece thereby creating a magnetic attraction amongst the chuck plus the workpiece. This attraction will stay consistent, uniform, infinite, and dependable provided that the magnetic field is energized. This reliability tends to make magnetic workholding a actually protected technologies.

Magnetic Perform Holding as a Safe Holding Force

Holding energy or strength is yet another issue viewed as when forming an opinion concerning the security of magnetic workholding. If an operator doesn't know how sturdy magnetic workholding is, he might mistakenly believe magnetic technology is not strong adequate to perform the job safely. This opinion is often allayed by two details:

(1) magnetic workholding can have a clamping power as much as 1000 daN and

(2) based 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 benefit: magnetic holding force is uniform, continuous and infinite until the operator de-energizes it.

Optimal Operating Circumstances

To implement magnetic perform holding options could need some instruction to know the technology's optimal operating situations. For example, magnetic work holding is best employed with smooth-surfaced workpieces as an alternative to rough ones due to the fact the smoothness decreases the air gap involving the workpiece along with the magnet; little air gaps increase magnetic attraction and also the holding bond. Some supplies are superior conductors of magnetism than other folks. One example is, annealed components are ideal when hardened supplies do not absorb flux as quickly and will retain some magnetism. This condition can be corrected inside seconds with demagnetization. Lastly, the direction with the holding force is but a further adjustment an operator might have to produce to safely implement magnetic work holding. All magnets have 100 % clamping force directly away from the face on the magnet, but only about 20 % clamping force against side forces. So, the geometry of a reduce have to be regarded within the machining process to reap the positive aspects of this sort of workholding.