Assessing The Security Of Magnetic Workholding

Izvor: KiWi

Resistance for the implementation of magnetic operate holding usually starts using a concern for security. These concerns might be allayed by assessing the technologies, holding power and optimal operating conditions of magnetic function holding with regards to operational security.

Despite the competitive http://www.pdqwh.com positive aspects of magnetic workholding in lowering fees and enhancing productivity, there nevertheless exists a resistance towards the implementation of magnetic technologies because the major perform holder in machining operations. This resistance generally begins with a concern for safety. By assessing the technology, holding energy and optimal operating conditions of magnetic operate holding relative to operational security, these concerns is often allayed.

Magnetic Operate Holding as a Secure 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 an issue of trust: Is this seriously protected? Though understandable this opinion is rooted in subjectivity not objective reality. More than probably, individuals who hold this point of view may not totally fully grasp the facts of how safe magnetic operate holding is.

So, how can magnetic function holding be considered as a safe technology? By definition, it produces a uniform, consistent, and infinite holding energy that will not unwind, give, or lower till an operator de-energizes it.

Generally, magnetic work holders are constructed with an array of individual 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 making a magnetic attraction between the chuck plus the workpiece. This attraction will stay constant, uniform, infinite, and trustworthy provided that the magnetic field is energized. This reliability makes magnetic workholding a definitely secure technology.

Magnetic Function Holding as a Safe Holding Force

Holding power or strength is another element regarded as when forming an opinion about the security of magnetic workholding. If an operator doesn't know how sturdy magnetic workholding is, he might mistakenly think magnetic technology isn't sturdy enough to perform the job safely. This opinion can be allayed by two details:

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

(two) based upon the application, an instantaneous clamping force of 12 tons per square foot can be generated by magnetic workholders. This level of holding force is greater than comparable to mechanical clamps with one particular further advantage: magnetic holding force is uniform, continuous and infinite until the operator de-energizes it.

Optimal Operating Situations

To implement magnetic function holding options may require some coaching to know the technology's optimal operating circumstances. As an example, magnetic work holding is very best employed with smooth-surfaced workpieces as opposed to rough ones because the smoothness decreases the air gap amongst the workpiece and also the magnet; smaller air gaps boost magnetic attraction as well as the holding bond. Some components are much better conductors of magnetism than other folks. For example, annealed materials are perfect when hardened materials never absorb flux as very easily and can retain some magnetism. This situation could be corrected within seconds with demagnetization. Lastly, the path of your holding force is but a different adjustment an operator may have to produce to safely implement magnetic perform holding. All magnets have one hundred % clamping force straight away in the face of the magnet, but only about 20 % clamping force against side forces. So, the geometry of a reduce should be thought of within the machining approach to reap the benefits of this kind of workholding.