Assessing The Safety Of Magnetic Workholding

Izvor: KiWi

Resistance to the implementation of magnetic work holding usually starts with a concern for safety. These issues might be allayed by assessing the technologies, holding energy and optimal operating conditions of magnetic perform holding when it comes to operational safety.

Despite the competitive metal working added benefits of magnetic workholding in decreasing charges and enhancing productivity, there nonetheless exists a resistance for the implementation of magnetic technology because the main operate holder in machining operations. This resistance normally starts with a concern for safety. By assessing the technology, holding energy and optimal operating circumstances of magnetic function holding relative to operational safety, these concerns is usually allayed.

Magnetic Function 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, especially in heavy milling operations, boils down to a problem of trust: Is this truly safe? Though understandable this opinion is rooted in subjectivity not objective reality. Greater than probably, those who hold this point of view may not fully realize the details of how secure magnetic function holding is.

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

Normally, magnetic function 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 power 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 in to the workpiece thereby making a magnetic attraction amongst the chuck plus the workpiece. This attraction will stay constant, uniform, infinite, and reputable provided that the magnetic field is energized. This reliability tends to make magnetic workholding a truly secure technology.

Magnetic Work Holding as a Protected Holding Force

Holding energy or strength is another issue thought of when forming an opinion in regards to the safety of magnetic workholding. If an operator does not know how robust magnetic workholding is, he may well mistakenly believe magnetic technology just isn't strong enough to complete the job safely. This opinion is usually allayed by two facts:

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

(two) based upon the application, an instantaneous clamping force of 12 tons per square foot is often generated by magnetic workholders. This level of holding force is more than comparable to mechanical clamps with 1 extra advantage: magnetic holding force is uniform, continuous and infinite till the operator de-energizes it.

Optimal Operating Conditions

To implement magnetic perform holding solutions may well require some education to know the technology's optimal operating circumstances. As an example, magnetic operate holding is ideal utilized with smooth-surfaced workpieces in lieu of rough ones due to the fact the smoothness decreases the air gap between the workpiece along with the magnet; compact air gaps improve magnetic attraction along with the holding bond. Some components are superior conductors of magnetism than other people. One example is, annealed materials are excellent even though hardened supplies don't absorb flux as simply and will retain some magnetism. This condition is often corrected inside seconds with demagnetization. Finally, the direction from the holding force is however a further adjustment an operator may have to make to safely implement magnetic function holding. All magnets have one hundred % clamping force straight away from the face of the magnet, but only about 20 percent clamping force against side forces. So, the geometry of a cut must be viewed as within the machining approach to reap the benefits of this type of workholding.