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New 5-Axis Grinding Center Machines Complete Parts Up to 3200mm Long

Based on requests from customers, Haas has recognized a trend towards complete machining of ever bigger workpieces in one clamping. Manufacturers of large diameter, long length parts with complex, precise features want these large parts processed from one piece, in one clamping, in one machine cycle.

Combining multiple operations into a single clamping and into a single machine cycle has multiple benefits: higher overall precision, lower labor and handling costs, fewer number of machines, reduced floor space requirements and faster overall throughput to name a few.

Parts such as hob cutters, broaches, geared shafts, cutting rotors, landing gear components, turbine engine components, winch drives, racks and guideways are ideal candidates for the new high-tech grinding center, where precision, quality and process reliability are paramount.

The development of the Multigrind® CB XL model was a challenge for the engineers from Haas Schleifmaschinen because of significantly larger part dimensions and weights. The design task included maintaining "small part" microns accuracy even on larger parts. No small task.

The solution was based on the award-winning, flagship Multigrind® CB, a model designed from the beginning to be adapted and deployed for future demanding grinding tasks. This new CB XL grinding center has much of the same structural design as the CB, but with a "stretched" X-axis and machine table.

Due to its symmetric design, the Haas Multigrind® CB XL maintains stability and rigidity, regardless of part length. The effects of thermal growth are minimized because the grinding contact point is always in the center of the "box" frame. The axis configuration reduces unwanted transitions or vibrations.

The massive mineral cast bed as well as the high-precision linear drive in the machine table ensure stable processes and repeatable grinding results. There is room on the machine table for up to four work supports. Four telescoping doors make for easier loading and unloading and for easier machine setup.

The new Multigrind® CB XL is available in four incremental lengths for workpieces from 1400 to 3200 mm. The modular design also includes options for table extensions which can be configured for the specific requirements of individual customers and applications.

Grinding wheel shapes are produced and maintained with on-board dressing spindles and automatic wear compensation, ensuring consistent precision.

Direct-driven, water-cooled grinding spindles are suitable for grinding, milling and drilling. Drive power up to 50 kW [67 HP] at speeds up to 12,000 rpm deliver high material removal rates.

The HSK 80 E interface ensures quick, precise and repeatable automatic wheel change. For most applications the standard tool magazine with up to 15 wheels is enough. Beyond that, Haas offers a shelf tool magazine with space for 65 grinding wheels up to 300 mm in diameter and up to 20 coolant nozzle sets.

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