Magnetic Milling Chuck - Ningbo MaxMagnet Co., Ltd.

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Magnetic Milling Chuck

Manual work holding often requires multiple fixtures or the changing clamps, vises or screws over the course of different phases of a milling operation. Replacing manual clamping with magnetic milling chucks eliminates the inefficiencies of conventional work holding devices. They provide better work piece accessibility, reduced vibrations for machining accuracy, five-sided accessibility, and reduced setup time, which summed together improve workflow efficiency. This makes them quite adaptable to work piece clamping for a wide range of vertical or horizontal machining applications, including but not limited to, profiling, face milling, edge milling, plunge milling, slotting, surface grinding and drilling.

Construction and Control

Magnetic milling chucks are constructed with high-powered ceramic or Neodymium permanent magnets that are usually controlled by permanent magnetic or electro-permanent magnetic technology. The magnetic pole surface is manufactured with an all-steel design, facilitated by the use of milling chuck tee slots that allow the clamping of non-ferrous work pieces. The poles are configured in a longitudinal or square geometry. The pole distribution ensures a uniform magnetic force over the entire surface area of the work piece. The magnetic field is designed such that the top plate of the chuck does not have any stray magnetic fields, which prevents chip collection on the work piece and the cutting tool.

Magnetic milling chucks can be controlled in two ways: mechanically with a lever or electronically with a chuck controller. The permanent magnet type uses a lever to engage or disengage the magnetic field. It requires no electrical power to operate. The electro-permanent magnet type uses a chuck D.C. controller to energize or de-energize the magnetic field, which takes about 1 second. However, it does not need electrical power to operate, which gives this control type a fail safe feature.

Riser Blocks and Double Magnets

To enhance the broad range of machining operations appropriate to magnetic run holding, riser blocks or pole extenders could be employed using a magnetic chuck to raise accessibility and reduce interference. These blocks are essentially stand-offs that enhance the run product above the surface area inside the magnetic chuck. The riser blocks allow the place of run pieces above the chuck to ensure that through-machining operations are achieved without any damaging the magnetic surface. It also allows for element and back again cutting. Pole extenders and self-shimming poles could be fitted with magnet modules for higher flexibility. Double magnets could be employed using a magnetic chuck to provide product clearance and uniform clamping in particular areas. They possess a clamping force of 1700 LB (7.6KN) jointly with a area depth of 15mm. The could be daisy chained to hold out uniform clamping on huge run pieces.

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