Mag puts a new angle on HMC spindles

  • 04-Dec-2009 03:46 EST

The high-torque, 80-kW spindle is especially suited for aerospace titanium cutting, says Mag.

Mag says it followed the voice of the customer for input into the design of its modular HMC 1250 Series with a new 180,000-position A-axis tilt spindle for five-axis horizontal machining on large parts. The new 6000-rpm 46-kW tilt spindle joins an all-around 10,000-rpm 56-kW spindle, a high-speed 24,000-rpm spindle, a high-torque 2600-N•m spindle, and two live spindles (110- or 130-mm diameter) as headstock options.

The high-torque 80-kW spindle is especially suited for aerospace titanium cutting, the company says, while the live spindles extend W-axis reach by up to 800 mm, enabling deep-cavity milling to high precision with shorter, more rigid tool lengths. Standard on the live spindle, MAG's exclusive Z-axis thermal-compensation software dynamically offsets spindle growth to maintain tight tolerances.

The HMC 1250 Series is engineered for high-precision, high-productivity machining of large aerospace, power-generation, pump, valve, and off-road equipment parts. Major machine components, including the X-bed, Z-bed, and column are cast ductile iron, with 1250 x 1600 mm pallets, headstock, and rotary table housings of gray cast iron. A modular design provides a range of machine travels, 60- to 120-tool magazines, and two control choices, in addition to five spindle options, plus tilt capability. That application flexibility combines with maximum 3000-mm work zone swing range, 2050-mm work height capacity, and 7000-kg work load.

The machine offers 56 to 80 kW spindle power, 35 kN Z-axis thrust, and super-rigid, full-contouring hydrostatic rotary table. Productivity is enhanced with 40-m/min rapid traverse/feed rate and 15-s tool change (for up to 35-kg tools) to maximize in-cut productivity.

A standard 360,000-position contouring table enables precision four-axis machining of a variety of part geometries. The hydrostatic table provides a rigid machine platform, while a rugged worm gear drive with clamp securely holds axis position.

Meeting industry needs for tighter part tolerances and greater machining accuracies, the HMC Series comes standard with linear-scale feedback in X, Y, and Z axes, providing 8-micron positioning accuracy and 5-micron repeatability. Heavy-duty hardened and ground roller guide ways enable higher rapid traverse and acceleration/deceleration rates with double the load capacity and nearly 10 times the wear life of ball-type ways.

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Boeing and Airbus forecast a worldwide demand for up to 40,000 new aircraft over the next two decades. With a 10-year production backlog and new aircrafts increasingly counting on lightweight composites, manufacturing companies are developing advanced sandwich-structure composite solutions to fill the production gap.

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