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♦ What is grinding?
Grinding is the work that finishes the surface areas. Basically, the method is applied to the work to finely grind or polish the surface area to make it smooth by using a solid substance with higher hardness than the surface of the work piece.
The surface treatment grinding is roughly classified as follows:
- Buffing
A method for grinding the material by attaching grinding material, etc., to the periphery (surface) of the grinding wheel (buff), which is made of a cloth or other materials, and rotating the buff on the material.
- Belt Grinding
A method of grinding the work piece with friction that is generated by pressing the work piece on a belt rotating at a high speed.
- Lapping Film Polishing
A method of fine polishing by pressing the lapping film onto the work piece. The thickness of the polyester film is thin, and the abrasive grains are evenly dispersed on the film, which ensures small fluctuations in the height of the major cutting edge, resulting in the good finishing surface.
- Lapping/Polishing
The method is frequently adopted for the final finish of electronic parts. This is a grinding method using loose grains.
♦ Difference between Lapping Film Polishing and Other Grinding Methods such as Buffing
The greatest advantages of tape grinding include those described in the section Advantages of Lapping Film Polishing. Then, what are the different points from other grinding methods including buffing?
- Buffing and belt grinding generate powder dust, and they are not suitable for use in a clean environment.
» Lapping film polishing offer excellent abradability, higher surface precision, and stability. Furthermore, they hardly generate any powder dust and, therefore, are excellent in terms of the environmental aspects.
- Buffing and belt grinding should be hand-processed and are heavily dependent on craftsmanship and experienced workers. In addition, the appropriate system offers low stability for any profile irregularity.
» Lapping film polishing ensures an automated operation, thus offering higher efficiency and stable profile irregularities.
- The following chart shows the processing efficiency of the buffing and the belt grinding:
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