Stepless Speed Double Disc Water Cooling Metallographic Grinding
and Polishing Machine XGrind-308
Technical Data Download:
iqualitrol Grinding and Polishing Machine XGrind-308
Brief Introduction:
XGrind-308 is suitable for pre-grinding, grinding and polishing
metallographic specimens. Since the machine is speed-adjusted by a
transducer, it can run between 50 and 1000rpm , which favors the
machine with wide applications.
The machine is equipped with cooling system which can cool down the
specimen during rough grinding so as to prevent overheating and
avoid damage the metallographic structure .
Featuring easy operation and reliable performance, it is an
indispensable device for the factories, research institutions and
college labs to prepare metallographic specimen.
Technical Specifications:
| Model | XGrind-308 |
| Grinding/polishing disc diameter | φ203mm |
| Rotate speed: | 50-1000r/min |
| Power Supply | AC220V 50Hz |
| Grinding/Polishing disc quantity | 2 |
| Motor Power Consumption | 550W |
| Dimension | 725mm x710mm x310mm |
| Net weight | 50kg |
Surface layers damaged by cutting must be removed by grinding.
Mounted specimens are ground with rotating discs of abrasive paper,
for example wet silicon carbide paper.
The coarseness of the paper is indicated by a number: the number of
grains of silicon carbide per square inch. So, for example, 180
grit paper is coarser than 1200 grit.
The grinding procedure involves several stages, using a finer paper
(higher number) each time. Each grinding stage removes the
scratches from the previous coarser paper.
This can be easily achieved by orienting the specimen perpendicular
to the previous scratches. Between each grade the specimen is
washed thoroughly with soapy water to prevent contamination from
coarser grit present on the specimen surface. Typically, the finest
grade of paper used is the 1200, and once the only scratches left
on the specimen are from this grade.
The series of photos below shows the progression of the specimen
when ground with progressively finer paper.
Polishing discs are covered with soft cloth impregnated with
abrasive diamond particles and an oily lubricant or water
lubricant.
Particles of two different grades are used: a coarser polish -
typically with diamond particles 6 microns in diameter which should
remove the scratches produced from the finest grinding stage,
and a finer polish – typically with diamond particles 1 micron in
diameter, to produce a smooth surface.
Before using a finer polishing wheel the specimen should be washed
thoroughly with warm soapy water followed by alcohol to prevent
contamination of the disc. The drying can be made quicker using a
hot air drier.
Mechanical polishing will always leave a layer of disturbed
material on the surface of the specimen. Electropolishing or
chemical polishing can be used to remove this, leaving an
undisturbed surface.
Pre-grinder machine is the result of a large-scale research work
and the wisdom of the designers as well as the suggestions of the
users. As an excellent piece of specimen pre-grinding, the
pre-grinder has a lap with a larger diameter compared with the same
kind of machines produced in our country and the rotational speed
of its lap is quite different form that of the machines turned out
in our country in order to meet the requirements of the
pre-grinding of various materials.
The working principle of Pre-grinder machine is as follows:
clear water provided by a water tube flows into the rotating lap
and the abrasive paper flowing over the water throws the water out
of the lap as the result of the excentric force of the rotating lap
forming a vacuum space before the atmospheric rescuer presses the
abrasive paper on the lap tightly. Now it is time to operate the
pre-grinding. When the lap stops rotating, the work is done and
abrasive paper can be easily taken off.
Q-80Z Cutting Machine can cut round workpiece with the diameter of
80mm or less, you can also cut rectangular specimens with Height
under 80mm, Depth under 200mm.
Q-80Z cools the sample through a self-circulating cooling system to
prevent burning the structure of the specimen from overheating
during the cutting process.
The machine can also cut different samples by setting the cutting
speed, thus improving the quality of the cutting sample.
The machine is divided into manual cutting and automatic cutting.
Large volume of the cutting room, more convenient for cutting use,
it is one of the necessary sample preparation equipment of the
tertiary institutions, factories and enterprises.
