Superfinish | Nanofinish | Microfinish
superfinish, nanofinish, microfinish | polishing, linishing, honing of cylindrical parts
Superfinish attachements and machines. Ultra fine surface finishing of Ra 0,002 - Ra 0,06 µm - Honing with superfine abrasive and oscillation up to 3000 cycles per minute
Not too long ago, the preferred method to achieve percise surfaces was honing with a grindstone.
Today’s method – superfinishing / microfinishing / microfinish honing - is much more efficient and has set new standards.
The result:
reduced machining time, more precise finish, repeatable results and cost-effectiveness. Microfinishing creates a uniform and consistent finish over the entire workpieces surface. Microfinishing also called Superfinishing increases the load-bearing area and so the wear resistance.
The material removal of this technology is in the range of a few thousandths of a millimeter. Superfinishing removes the amorphous material structure that is called “soft skin”. This 0.002 to 0.008 mm thick layer is created, for example, by high cutting temperatures during stone grinding. The removal of this soft-skin is done by using a superfinishing abrasive film. These superfinishing film rolls are 15 to 50 m long and available in grain sizes from 0.1 to 100 μm. The tape is unwinded by a speed-controlled motor. As the tape is used only once, the finish result is 100% repeatable.
The feed rate of the film can be adjusted. The belt passes over a elastomer contact roller, which is oscillating along the workpiece axis on the surface of the workpiece to create even finer results.
The interaction of the three parameters
a) oscillation frequency
b) correct feed of the superfinish film and
c) speed of the workpiece to be machined generates the desired cross hatch surface structure.
By changing these values, the angle of the honing surface scratch pattern can be varied. The superfinishing is carried out with the aid of coolant or oil. All units are designed as a machine attachment, so it can easily be mounted onto conventional lathes or other machines.
Superfinish is the final operation step after grinding, polishing or hard turning. Typical applications include gravure rolls, film rolls, rubber rolls, rocker shafts, bearing seats, sealing surfaces, piston rods, copy rollers, pneumatic pistons, gas spring pistons, valve spools, shifter shafts, ball valves, printer axles, hydraulic cylinders and piston rods, laser engravings.
