Flap Discs’ Three Working Surfaces Grind Weld Seams, Unusual Part Curves
Polifan-Curve flap discs from Pferd Inc. are designed to provide a fast, productive and economical way to go from rough grinding to smooth finishing in a single step, particularly for fillet weld applications. The discs remove weld seams and slag, leaving a finish smooth enough for easy identification of cracks, inclusions and porosity in the fillet during weld inspections. Unlike conventional flap discs, Polifan-Curve provides three fully-usable working surfaces—the top face, bottom face and entire radial edge—making this tool suitable for grinding fillet welds as well as unusual curves such as those found in ornamental pieces. The flap discs also produce good results in contour grinding, removing material faster than bonded wheels and leaving a smooth ﬁnish for easy visual inspection. The larger-diameter discs provide deeper reach and have more coated material for long disc life. With minimal loss of diameter with wear, high productivity is sustained through the life of the disc, the company says.
The ﬂap discs are available in a variety of diameters (4½", 5", 6" and 7") and abrasives (Zirconia, A/O for aluminum and ceramic oxide). They are also available with a 7/8" arbor hole or quick-change 5/8"-11" hub.
The double-disc grinding process is consolidating its position in automotive applications but is moving into other industries. Double-disc grinders are now easier to operate, and they have added capabilities for control flexibility, precision process control, faster changeovers, and grinding of nontraditional materials.
Optimizing a camshaft lobe grinding cycle has traditionally been based less on science and more on educated guesswork and numerous test grinds. Now, computer thermal modeling software can predict areas where lobe burning is likely to occur, in order to determine the fastest possible work speed that won't thermally damage lobes and greatly reduce the number of requisite test grinds.
Advanced grinding equipment gives this shop the flexibility and automation it needs to serve customers with either rapid-response or high-volume jobs.