High-performance in 5-axis machining
As a further addition to the time-tested range of machines from Fehlmann the Picomax 825 Versa has been newly developed from the ground up for the 5-axis machining of larger work pieces.
The Picomax 825 Versa was developed right from the start as a 5-axis machine designed to meet the most demanding requirements. The heart of the machine is the Fehlmann HSC motor spindle.
Among the outstanding features of the 825 Versa are the extremely sturdy portal design, the integrated tilting rotary table along the X axis and the optimum operating ergonomics. The portal design of the machine, including the guide and drive systems, is ideal for handling the modern high-performance machining processes that users expect today.
Precision linear guides with direct travel measurement systems in all axes, broadly supported guide blocks and ball screws guarantee high axis feed rates and acceleration for practical, extremely precise HSC machining. The FEM-optimised structure of the machine with 3-point support is made of grey cast iron. The mounting surfaces of the machine’s structural components are shaved to create the best possible geometries. Other advantages of this choice of material are optimum damping properties and homogenous thermal conductivity, which in turn ensures that the operating temperature is quickly reached, combined with consistent 24-hour accuracy, highest geometrical precision and great rigidity.
The Picomax 825 Versa was developed right from the start as a 5-axis machine designed to meet the most demanding requirements. The tilting rotary table is integrated longitudinally into the machine concept, thus allowing tilt operation that is wholly unaffected by the linear axes (no cross torque). The table has dynamic torque drives, mechanical clamps and direct travel measurement systems on both axes. Outstanding characteristics of the 5-axis simultaneous processing capability are the high dynamics and the very large tilt range of 230° (+/- 115°). The highly rigid tilting rotary table with 3 carriages per guide rail is able to take loads of up to 350 kg, and can handle parts with pallet sizes of up to 400×400mm resp. diameters up to 560 mm. The new machining centre can be equipped with zero point clamping systems from various manufacturers (EROWA, 3R, Schunk, etc.)
The heart of the Picomax 825 Versa is the Fehlmann HSC motor spindle. Whether with HSK-A63 and 14’000 or 20’000 rpm or with HSK-E50 and 30’000 or 36’000 rpm – all spindle types grant low-vibration and precise concentricity for best surfaces and maximum tool life.
In the standard version, the tool changer with chain magazine offers room for 44 tools up to Ø 130mm max. An extension magazine with up to 250 pockets is optionally available.
Chip removal is designed for both dry (minimal-volume lubrication) and wet machining operation (cooling lubricant / oil). Removal of the chips and coolant is via two spiral conveyor units installed to the left and right of the table.
Careful attention has been paid to creating a thermo-symmetric machine structure as well as other specific measures for additionally enhancing precision, including thermo-compensation and positional correction of the main spindle through the use of direct measuring systems. Thus, the heat-producing components are actively cooled, and the lining of the interior space (also with stainless steel) prevents direct transmission of the heat from the chips and cooling water to the machine structure.
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