Metallographic Grinding Automatic Polishing Machine With Polishing
Head
Brief Introduction:
iGrind-826 is a double disc automatic grinding/polishing machine,
apply advanced micro processor, makes grinding disc and polishing
head realize stepless speed, the setting of pressure and time is
convenient and intuitive.
Operator just needs to replace grinding disc, sandpaper and
polishing fabric can start grinding and polishing operation.
This unit comes with water cooling device and washing nozzle, used
to cooling specimens during grinding, to avoid overheating damage
metallographical structure. washing nozzle can wash away the
grinding scraps thoroughly.
This unit is suitable to do automatic rough grinding, finish
grinding, rough polishing and finish polishing, with the features as follows:
1, Rotation direction is exchangeable
2, Quick replace of grinding/polishing discs
3, Multiple specimen holders
4, Pneumatic single point loading
5, Automatic Grinding consumables deliver (optional)
6, Stable rotation, safety, reliability, low noise
7, Cast aluminium base enforced the rigidity
Technical Specifications:
| Model | iGrind-826 |
| Disc Diameter | φ250mm |
| Disc Rotation Speed | 50-1000rpm (Opt 150rpm and 300rpm) |
| Head Rotation Speed | 5-150rpm |
| Loading Range | 5-60N |
| Preparation Time | 60-999S |
| Sample Diameter | φ30mm |
| Input Power | 1.1KW |
| Input Voltage | AC220V/50HZ/1Ph |
| Dimension | 758 x 785 x 680mm |
| Net Weight | 98kg |
After mounting, the specimen is wet ground to reveal the surface of
the metal. The specimen is successively ground with finer and finer
abrasive media. Silicon carbide abrasive paper was the first method
of grinding and is still used today.
Many metallographers, however, prefer to use a diamond grit
suspension which is dosed onto a reusable fabric pad throughout the
polishing process. Diamond grit in suspension might start at 9
micrometres and finish at one micrometre.
Generally, polishing with diamond suspension gives finer results
than using silicon carbide papers (SiC papers), especially with
revealing porosity, which silicon carbide paper sometimes "smear"
over.
After grinding the specimen, polishing is performed. Typically, a
specimen is polished with a slurry of alumina, silica, or diamond
on a napless cloth to produce a scratch-free mirror finish, free
from smear, drag, or pull-outs and with minimal deformation
remaining from the preparation process.
After polishing, certain microstructural constituents can be seen
with the microscope, e.g., inclusions and nitrides.
If the crystal structure is non-cubic (e.g., a metal with a
hexagonal-closed packed crystal structure, such as Ti or Zr) the
microstructure can be revealed without etching using crossed
polarized light (light microscopy).
Otherwise, the microstructural constituents of the specimen are
revealed by using a suitable chemical or electrolytic etchant.
