Flexibility based on ergonomics

The S131, S141 and S151 represent a new series of internal cylindrical grinding machines in which the Swiss grinding machine manufacturer has paid special attention to ergonomics, handling and flexibility.

The S131 has a swing diameter over the table of 250mm and features a maximum grinding length of 160mm for internal and 125mm for external diameters. It is available in one design length for workpieces with a maximum length of 300mm.

The S141 is available in different models for workpieces with maximum lengths of 300, 700 and 1,300mm. The swing diameter over the table is 400mm for all models, while the maximum grinding length is 250mm for internal and 150mm for external diameters. The S151 is slightly larger than the S141, with a swing diameter over the table of 550mm and a maximum grinding length of 390mm for internal and 150mm for external diameters. The user can choose between two models for maximum workpiece lengths of 700 and 1,300mm.

Studer says the latest models demonstrate the sophisticated ergonomic concept of the series. The design ensures safety during machine operation and workpiece inspection as well as efficient process control. Above all, the ergonomics of the machines also contribute to the operator's safety in the long-term.

The features responsible for these advantages include: the axis layout of the machines and the arrangement of the spindles at the front of the spindle turret; the new dressing concept and the generously dimensioned two leaf sliding doors which not only enable good accessibility for workpiece and grinding wheel change but also excellent visibility. As the 15 inch touchscreen operating terminal of the Fanuc control system 31i-B with integrated PC is positioned on the right of the double sliding door, the machine operator always has a complete overview of the work area.

To achieve short changeover and set-up times, high processing efficiency and intuitive, error-free handling, Studer has equipped the S131, S141 and S151 with the Quick-Set option in the StuderWIN software and a robust, easy to use toggle lever steady rest. Added to this is a quick and easy wheel change which gets its efficiency from the software used, a 1-key concept and the ergonomic design. The workhead is adjustably mounted on a swivelling table. The automatic swivel axis has a swivelling range of -10° to +20° (length 1,300mm +15°).

The S131, S141 and S151 are designed as highly flexible machines which are capable of both internal and external grinding as well as form, noncircular and thread grinding. Not only can they be used to machine a large range of parts, but they can also cover the entire diameter range in external grinding. The capability of the S131, S141 and S151 to execute both internal and external grinding operations is thanks to the axis concept, a sophisticated arrangement of spindles, dressers, and a grinding spindle turret with integrated swivel axis, which allows the use of a maximum of four grinding spindles with up to two external grinding wheels and a universal measuring probe.

A new arrangement of the dressing position and reversal of the grinding direction during external machining ensure that the S131, S141 and S151 can cover the entire diameter range in external grinding. As the machines can be equipped with up to two swivel-in dressing devices with stationary or rotating dressing tools, optimised grinding tools are engaged throughout the machining process. This provides the prerequisite for high precision and surface quality of a broad range of workpieces.

A sister product in the range is the S121 machine for medium-sized workpieces in individual and small batch production.

Equipped with the advanced technology of the S141 series the model has been limited to essential features. An example is the spindle turret, which swivels through 180° to a stop and is equipped with two grinding spindles. Alternatively a fixed spindle is possible.

With the S121 Studer claims it has created a tailor-made machine for the internal, surface and external grinding of chuck components, offering exceptional value for money. While a T-slide arrangement or the use of a maximum of two tools guarantees the attractive price, the manufacturer says it has made no compromises in terms of the advanced technologies used, including the StuderGuide guideway system for the X- and Z-axis, which guarantees high geometrical traversing and guidance accuracy through the entire speed range, together with high load capacity and cushioning levels.

Although the smallest machine in the universal series in terms of space requirement, larger diameters can be machined on the S121 than on an S131. This makes it a high performance machine with an impressively compact design. The S121 has a swing diameter over the table of 400mm and maximum workpiece length of 300mm, with a maximum grinding length of 175mm for internal and 100mm for external diameters. This large range of workpiece dimensions is made possible by optimal arrangement of the machine components.

STUDER
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