Water Cooling XGrind-319 Single Disc Grinding Polishing Machine with Fixed Double Speed

Water Cooling XGrind-319 Single Disc Grinding Polishing Machine with Fixed Double Speed

Catalogue Download: Grinding and Polishing Machine XGrind-319

Brief Introduction:

XGrind-319 single disc Metallographic Grinder and Polisher is suitable for carrying out pre-grinding, fine grinding and polishing against metallographic specimens.

Since the machine has fixed double speeds 150rpm and 300rpm, which favors the machine with wide applications.

XGrind-319 is equipped with cooling system that can cool down the specimen during pre-grinding so as to prevent overheating and damaging the metallographic structure .

XGrind-319 is convenient and on the safe side .It is an ideal option for the lab .of factories, science and research institutions and universities.

Technical Parameters:

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.

HPA-1 Metallographic Grinding Machine designed through various investigation and gathering opinions and requirements of various users. Adapt to the needs of grinding more material. The disc diameter greater than the domestic similar products. The speed of the mill is different from domestic products, is an excellent sample grinding equipment.

Grinding and polishing is the final stage in the metallographic sample preparation process and consists of several steps. Each step uses finer abrasive than the previous one, the ultimate goal being to produce a deformation-free, scratch-free and highly reflective sample surface. The sample may need to be examined, either etched or unetched, to reveal the microstructure of the material. It frequently happens that contrasts in the material are only visible after a successful etching step.

After a metallographic sample has been mounted, grinding and polishing creates a flat and even surface. Any potential residue from the mounting process or damage from the sectioning process are ground off to expose the actual microstructure of the sample. Polishing removes abrasions from the previous steps to provide a smooth surface. LECO grinding and polishing instruments ensure that metallographic instruments provide a reliably clean sample that will be ready for further analysis.

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.