flapwheel and flap disk are abrasive disks, used for metal finishing. Unlike a simpler flat disk, made of abrasive coiled abrasive sheets, a flapwheel is made of several overlapping pieces or 'flap', bound to a central hub.
Video Flapwheel
Benefits
Excess flapwheel on the traditional disk there are two:
- The separate flaps each attack the workpiece's surface at slightly different angles, and this is slightly different from the chisel angle. This avoids common problems with flat sheets, where they produce repetitive identical strokes.
- The abrasive wear is distributed more evenly throughout the flap, and through the length of each flap. Flaps wear out from the outer end and the carrier layer cuts back because the abrasive layer is worn out. The wheels remain useful even when the flap is eroding. Compared to flat sheets, which are discarded after only a small area of ​​completely outdated abrasive materials, this is a much more efficient use of abrasive materials.
Maps Flapwheel
Development
They appeared in the 1950s and their use was driven by the development of gas turbines. This demands an increase in the production of good investment castings that require careful polishing. In particular, the high centrifugal pressures experienced in these services require a non-scratch-oriented finishing technique that can act as a stress enhancer.
The first flapwheels are made of abrasive cut sheets, stacked into a flat plate in layers. This benefits from the long life of their materials, but their geometry is still flat and so they tend to produce flat surfaces if not handled carefully.
Early large-diameter flapwheels and are intended for use in fixed buffing machines. They are used for deburring and polishing castings, often not wire wheels. This piece is faster, with less contamination and surface contamination from the fur.
Portable flapwheels are made by attaching an abrasive radial flap to a hub equipped with a spindle shaft. It is intended for use with electric drills and is limited to a maximum speed of about 1,000 rpm.
With the development of an abrasive coating, the sheet material can withstand greater strength and velocity. This enables the production of flapwheels for use with high speed angle grinders. These disks differ in the format: flat, like the original rigid grinder discs, and with flaps arranged in overlapping and non-radial layouts. The extra lifespan given to the disk allows for its use for removal of stock and metal formation, not just finishing and polishing.
The flapwheel's flexibility is the advantage of smoothing curved work and avoiding the production of aspects, such as rigid disk problems. This is taken further advantage with the development of bounded foam flapwheels. It uses fewer flaps, separated by a flexible foam spacer. This makes it more pliable, making it more suitable for producing smooth finishes on curved surfaces.
References
Source of the article : Wikipedia
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