Roller Burnishing Tools
Burnishing Tool cold works metal
by process of Burnishing Hardened and highly polished precision tapered rolls
rotating around and bearing on an inversely tapered mandrel, apply steady
rolling pressure against the work surface. The high peaks of prepared surface
(generally 80 to 120 micro inches or 2 to 3 micrometers) are flown into the
microscopic cavities by the action of rolls under pressure from the tool. This
gives surface finish after Burnishing up to 0.05 to 0.4 Micron Ra.
FOR PROCESS IMPROVEMENT & LOW PRODUCTION COST
Accurate size, close tolerance in taper and ovality.
Mirror Finish Surface - in one pass.
Work Hardening of the finished surface.
Quick Touch, Fine Adjustment Mechanism.
Attachable to lathes, Boring Machines, Drill, NC Machines etc.
Roller Burnishing Tools for
Blind Holes, Bearing Housing
Various types of Roller Burnishing Tools
Roller Burnishing is a cold working process which produces a finer
surface finish by the planetary rotation of hardened rolls over a bored or
turned metal surface. Roller Burnishing involves cold working the surface
of the work piece to improve surface structure.
In the Burnishing process, the pressure generated by the rolls
exceeds the yields point of the softer piece part surface at
the point of contact, resulting a small plastic deformation of
the surface structure of the piece part. Since all machined surface consists of
a series of peaks and valleys of irregular height and spacing, the plastic
deformation created by roller burnishing is a displacement of the
material in the peaks which cold flows under pressure into the
valleys. The result is a mirror like finish with a tough work hardened,
wear and corrosion resistant surface.
The roller burnishing pressure required depends on number of
factors like ductility and tensile strength of the material, surface roughness
before and after roller burnishing, diameter and shape of the rolls.