The Arihant Flat-Fin with rotary transfer includes a centrally positioned column which is used to align the machining units. The rotary table, designed as a torque motor, can mount up to 6 work piece spindles depending on the model. The high momentum for rotary transfer allows auxiliary process time to be reduced to 0.8 seconds. Peak time-neutral loading and unloading is enabled thanks to the fact that all stations work simultaneously in this machine concept. Typical transfer times are between 6 and 12 seconds. Double and triple machining operations can be executed on this machine, with the result that two to three work pieces can be finished per transfer.
Minimum Diameter : 3 mm
Maximum Diameter : 150 mm
Maximum Diameter in Auto : 110 mm
Stroke length in Auto : 100 mm
Stroke length Manual : 150 mm
Spindle Speed : 50-3000 RPM
Spindle : Servo
Stroker : Servo
Expansion : Servo4
HMI : 7 inch
Where there is a demand for extreme precision you will find that superfinishing will achieve the highest form and surface qualities. This method eliminates amorphous surfaces and increases the internal compressive tension. Furthermore, it generates a metallurgically pure sur- face structure, minimizes friction and increases the load capacity and performance.
When machining cylindrical workpieces – like journals on drive shafts – a Superfinish tool (stone tape or belt) is placed against the surface of the workpiece. The tool then oscillates with short strokes while the workpiece rotates. The stones have grit between 500 and 1,200 and don’t need dressing. They can achieve roughness value of down to Ra 0.03 μm (Rt 0.1 and Rz 0.2 μm). And they can improve short and long waviness. This method is applied for roller bearings, roll barrels, piston pins and shock absorber rods.
Instead of stones you can also use Superfinish tapes. They are either only rotating or both rotating and oscillating, or while they are rotating the workpiece is oscillating. Tapes are used mostly for machining crankshafts, drive shafts as well as steering racks. For machining flat or spherical surfaces cup wheels or sleeves are brought in contact with the workpiece by drive systems . Here both the workpiece and the cup wheel rotate in opposite direction with the cup wheel positioned slightly beyond the workpiece centre. As opposed to grinding the Superfinish tools are not dressed. The rotating speed lies between 1 and 25 m/sec. Thus, the workpiece is not heated up and there is no sparking.
