Double-Column Grinder for Large-Part Grinding

The company’s dual-column, fixed-beam-type grinder is designed for speed and rigidity.

New Product Announcements From: 8/9/2010 Modern Machine Shop

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The company’s dual-column, fixed-beam-type grinder is designed for speed and rigidity. Table sizes range to 60" × 120" and load capacities weigh as 17,600 lbs. The machine grinds medium- to large-sized parts for aircraft, wind turbine, automotive, power generation, oil exploration, mining and heavy machinery.
 
The X-axis table speed ranges from 16 to 82 fpm. A high-precision, large-diameter, cartridge-type spindle runs with 4 pcs Class 7 (P4), angular-contact ball bearings, and a set of needle roller bearings in front increase metal removal. Driving the spindle is a 2,000-rpm motor running a 20" × 5" × 3" wheel.
 
The control system is based on the company’s PC-based Smart II CNC control, which features a three-step grinding and dressing mode; programmable concave and convex grinding functions; conversational graphic program for surface, crisscross, plunge and multi-slot grinding; an interrupt option for automatic wheel dressing during the grinding cycle; and a grinding simulation mode. A “macro zone” enables the operator to create and save custom programs that can be transferred through the Ethernet or Intranet.
 
Total rated power ranges from 30 to 80 hp. For extended grinding cycles, the machine uses a 132-gallon coolant tank and filtration system. The saddle movement is driven by rotating a ballscrew nut instead of a ballscrew to minimize vibration and thermal displacement. The machine base features hardened and ground double “V” longitudinal slideways for optimim straightness and smooth table movement, the company says. It also features four heavy duty box ways on downfeed.

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