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Home / Grinding of Complex Geometries

Grinding of Complex Geometries

The 325linear 5-axis CNC grinder from Schütte is ideal for processing micro tools, gun drills, hob cutters and complex geometries.

The Schütte 325linear cylindrical grinding system features extended X-Y paths plus two auxiliary slides. Optional robotic handling, wheel changing and tool magazines allow the same machine scalable automation in use. (first view)
The Schütte 325linear cylindrical grinding system features extended X-Y paths plus two auxiliary slides. Optional robotic handling, wheel changing and tool magazines allow the same machine scalable automation in use. (second view)
SIGSpro (Schütte Integrated Grinding Software) enables full 3D simulation of the entire cycle, either on the HMI or offline, for improved estimating and safety concerns.
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Schütte MSA, LLC (Jackson, Michigan) announces the introduction of its new 325linear machine, a 5-axis CNC grinder with extended X- and Y-axis movement, plus two auxiliary slides for workpiece clamping and improved grinding wheel guidance over the entire machining envelope. Micro tools, gun drills, hob cutters and complex geometries can be accommodated on this new grinder, which typically operates in the range of 2,500 rpm to 4,000 rpm.

The additional second auxiliary slide enables the 325linear to utilize tool guidance, part support, tailstock or workpiece pallets in operation. This machine further expands the user’s automation possibilities, as it also offers significant advancements in wheel change and robotic workpiece handling.

Specifically, on the A-axis a user can install collet chucks, hydraulic expansion chucks or multi-range chucks. With the automated collet changer on the machine, workpieces with different diameters can be clamped with high concentricity in the unmanned loader station. The A-axis configuration also permits position-oriented clamping of non-rotationally symmetrical workpieces. In this way, sequential workpieces with various roughing and finishing requirements can be preset on the machine for continuous processing.

Likewise, this grinding system offers scalable automation, with a 140-position tool changer, 5-24 grinding wheel magazine and a flexible robotic tool gripper for changing the smallest micro tools as available options. The same base machine can be utilized for continuous production of a single part in a work cell setup or used for sequential one-off work, as needed.

The 325linear features a universal rotation A-axis with a high level of concentricity (<0.0001 deg resolution) and pitch accuracy, while the XYZ-axis resolution is maintained at <0.1 microns. The swiveling C-axis for the grinding head has a 225 deg range of motion, also with <0.0001 deg resolution accuracy. The primary motor spindle operates up to 12,000 rpm with 15 kW maximum drive output, while the grinding spindle option affords a maximum speed of 24,000 rpm. Linear axis travel on the machine is (XYZ) 480 mm x 250 mm x 275 mm.

The machine is offered with the proprietary SIGSpro (Schütte Integrated Grinding Software) as the programming interface, allowing users to assign clamping options for each grinding operation being performed. When the support and tool guidance system are used, preset distances from the grinding wheel to the workpiece can be defined and held constant.  In the 3D mode, all cycle steps can be simulated, controlled and optimized for exact estimating, collision avoidance and even external workstation integration with the other workpieces.

All motion control on this new grinder is maintained on a Siemens 840D sl CNC with compatible drive technology. The 325linear grinding machine is available for viewing at the company’s North American headquarters in Jackson, MI, as well as various trade shows throughout 2015.

Schütte MSA, LLC, 4055 Morrill Road, Jackson, MI 49201, 517-782-3600, rfq@schutteusa.comwww.schutteusa.com.

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