Why is Workholding Always Put on the Back Burner?

Post written by: Ed Kroliczak, Director of Sales I was at a customer site recently showing off our newest magnetic workholding chuck for milling, the Multi-Flux system. The operator and production engineer were impressed by the new magnet and its features, and we began to discuss the different ways their company tries to improve production, […]

Magnetic Fixture Design and Cost Considerations

A magnetic chuck is nothing more than an assembly of steel and magnetic materials used for creating a force. This brief paper will help to illuminate some design aspects of magnetic chucks and how they relate to the cost. There are three primary classes of magnetic chucks: permanent magnetic chucks (manually actuated), electromagnetic chucks, and […]

Using a Magnetic Chuck to Mill a Round Bar Square

Workpiece Material: Hot rolled 8620 Steel Raw Workpiece Size: 5”diameter x 20” long Magnetic Chuck:  DM-MC-70SP-0406 (16 x 24”) Top Tooling: DM-MC-BP70-5 BACK Parallel Milling a round bar square on a magnet may seem daunting to the uninitiated, but as the following data shows, if managed with the right top tooling, is quicker and more […]

Heavy Turning on a Magnetic Chuck

Magnetic Chucks both electro and permanent types were originally developed for light machining and more specifically for grinding operations.  This form of workholding is the best way of presenting the whole of the workpiece to the grinding wheel and at the same time clamping uniformly and very accurately. Why, therefore, has the same philosophy not spread […]

Understanding Magnetic Flux Behavior

Magnetic flux is a measurable quantity of a magnetic field over a given area.  Flux lines are often used to depict the direction of flux as it flows from the north to the south pole of a magnet.  The greater number of these flux lines the greater the density of the flux and ultimately, the […]

Switchable Magnets Explained

Electro Magnets A simple electro magnet shown (fig.1) incorporates a coil of N turns wrapped around a ferromagnetic steel horseshoe. Direct current is applied to the coil which creates a magnetic force perpendicular to the coil. Magnetic flux passes through the poles of the horseshoe which will then influence any ferromagnetic material that comes within […]

A Molders Guide to Magnetic Quick Mold Change Systems

Having established a need to improve mold changeover time, when deciding upon the clamping process, the molder is confronted by three technology choices.. • Manual-Mechanical – typically for smaller presses.  Involves the mold being modified to accept some kind of clamping ring or spigot.  Specially designed plates are mounted to both platens which through the use […]

Are you a wrench-free facility?

I often find myself looking back to the days when, as a “wannabe” toolmaker, I had my butt (frequently) kicked because I failed to allow for the machine backlash or I overestimated the speeds and feeds for the HSS tooling of the time. Trying to clamp the workpiece without distorting it was an art-form and […]

Beware of Mr. No Problem!

The vast majority of the manufacturing and steel service industries have never incorporated permanent magnetic workholding and material handling technology into their production process; it is their right to be skeptical. Most important, they need qualified answers to alleviate or confirm their concerns. The problem for the inquirer is where to find those answers in the first place. There […]

Test Standards for Lifting Magnets

In November, 2005, I wrote to the B30 Committee at the American Society of Mechanical Engineers (ASME).  I had just completed my design for a new permanent magnetic lifter and wanted to make sure that in every respect, it met the standards as laid out in ASME’s B30.20 “Close Proximity Operated Magnets”. As I poured through the […]