Хонинговальные головки

3.2.1 Chemistry and Types of Vitrified Bonds Vitrified bonds consist of silicates (red and white clay), kaolin (also known as white clay, Al2Si2O5(OH)4), field spar (KAlSi3O8-NaAlSi3O8-CaAl2Si2O8), quartz (also known as silicon oxide, SiO2), and frits, i. e. pre-molten bonding components [BEYE04, HADE66, PADB93, JACK11, p. 92]. The bond is sintered at temper­atures above 800 °C […]

3.5.1 Rubber Rubber bonds are another type of organic bonds [ROWE09, p. 42]. Rubber bonds were once prominent for grinding of bearings and cutting tools, but today are mainly used for cut-off wheels and control wheels in centerless grinding [MALK08, p. 29]. Rubber bonded tools are manufactured by mixing of grits with synthetic rubber or […]

In the wire lapping procedure, a lapping medium of grits (commonly SiC) and medium (commonly oil or glycol) is sprayed on a non-coated wire [KLOC09, p. 386]. Because of the high costs and expensive disposal of the slurry, researchers have developed strategies for slurry refreshment and recycling [KLOC09, p. 387]. 4.6.2 Inner Diameter Saw The […]

Cut-off wheels need to be thin to reduce the removed material in the cut-off operation and to reduce power consumption. Reinforcement is necessary, because the resin bond of cut-off wheels is too brittle and unsafe for side forces. Therefore, cut-off wheels are reinforced with glass fibers, nylon discs, carbon, cotton cloth, linen, wood, silk, materials […]

Furthermore, ISO 3002-5:1989 defines the active grit count, Nact, as grit that are actually engaged [ISO89]. Werner expressed this as number of momentary grains per unit area, Nmom (Eq. 6.11) [WERN71]. Nmom = bs • lk • Nkin (6.11) 1 + a Nmom number of momentary grains per unit area a empirical factor bs wheel […]

For stationary dressers and form rollers, depth of dressing cut, aed, defines engagement depth of the dressing diamonds with the grinding tool in normal direction. For profile rollers radial dressing feed, frd, has the same implication. Grinding wheel wear and grit size define the depth of dressing cut [AVER82]. The depth of dressing cut should […]

Having chosen the track-bound principle for force generation, the functional requirements arise to hold the workpiece, provide the cutting speed and feed of the grits, and reduce the mechanical impact that is not crucial for the cutting action (Fig. 7.17). The workpiece can be held by mechanical or magnetic clamping, or the centerless principle can […]

From the time we enter the world with the help of medical instruments, until our final tombstone, polished to a glittering hardness, we live in the shadow of the grinding wheel. Name the product. Somewhere there lurks an abrasive operation; this has been so since the cave man, millions of years ago sharpened his tools […]

The most dramatic differences in performance occur between the grinding behavior of molten and sintered corundum. The introduction of sintered corundum led to tremendous tool life enhancements. The higher wear resistance and larger material removal rates of micro crystalline corundum compared to molten corundum results not only from the higher tough­ness of the abrasive material […]

The abrasives are processed chemically with acids and water damp to obtain wanted size, shape, and purity. SiC is washed with alkali or acid to remove adhesions of silicon, metals, metal compounds, graphite, dust, and SiO2 [LIET08]. Diamonds undergo an etching process to roughen their surface [MARI04]. Some abrasives like white corundum undergo special treatments […]