A magnetic assembly incorporates magnet alloy and non-magnet material. Magnet alloy is very hard and even simple features are difficult to incorporate into the alloy. Mounting and application specific features are easily incorporated into the non-magnetic materials which usually form the housing or magnetic circuit elements. The non-magnet elements will also buffer the brittle magnet material from mechanical stress and increase the over-all magnetic strength of the magnet alloy. Dura specializes in the design and optimization of assembly elements by the use of 2D and 3D BEA/FEA simulation software.
Select your desired magnetic assembly type for additional information:
Enhanced Magnetic Strength:
Magnetic assemblies typically have higher magnet force when compared to a magnet by itself because the flux conducting elements (steel) of the assembly are often times an integral part of the magnetic circuit. These elements, by the use of magnetic induction, will enhance the assembly’s field and focus it to the region of interest. This technique works best when using the magnetic assembly in direct contact with the work-piece. Even small gaps can dramatically impact the magnetic force. These gaps can be an actual air-gap or any coating or debris which stands the assembly off of the work-piece.
Magnetic assemblies can be integrated by a variety of methods and most are mechanical. The most common are press-fitting (interference) and by the use of a mechanical fastener. The press-fit assemblies will typically utilize a brass sleeve which is centerless-ground for insertion into a bore. Mechanical fastener mounting will make use of an incorporated tapped or through hole in the assembly.
Standard Magnetic Assemblies: (Stock)
Dura offers a variety of standard magnetic assemblies available from stock. Each assembly family has distinct advantages and disadvantages such as: cost, magnetic strength, size, environmental tolerance, and operating temperature.
All of these variables should be taken into account when selecting magnet assemblies.
Important considerations when selecting assemblies:
ETO: Engineered to Order Magnetic Assemblies / Custom (Application Specific)
Dura specializes in the development and fabrication of application specific magnet assemblies from a variation of an existing product to new product formation.
Concept Validation: Magnetic Concept Validation is used to determine if a magnet solution is viable. This process involves design exchanges between team members, drawing reviews, first order software simulations, and geometry mock-ups of the assembly.
Development: Dura can assist with assembly design or be commissioned to provide a “turn-key” solution based on the variables outlined in concept validation. The development stage will make use of Dura’s accumulated knowledge base acquired since 1961, 2D and 3D Boundary and Finite analysis simulation software, prototype construction, and empirical testing.
Manufacturing: Dura maintains an extensive in-house assembly manufacturing capability and augments certain skill-sets by managing relationships with a variety of key vendors. Our design and development process will take into account the target manufacturing location’s capabilities so as to ensure a simple conversion from prototype to production levels.
Reverse Engineer: With an in-house CMM and Hysteresigraph, Dura can quantify and qualify an existing magnet assembly for optimization or for duplication.
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