Bonds

The bond has a decisive influence on grinding performance, but also on the life and rigidity of the wheel. The bond determines whether a diamond or CBN wheel grinds cool, with a good grip, with a high stock removal rate and low contact pressure, but with a shorter useful life or harder, with a poorer grip, with a lower stock removal rate and high contact pressure, but with a longer useful life.

a) Soft Bond:
• low concentratios
• dry grinding
• workpieces sensitive to heat
• fine grits
• wide grinding coatings

b) Sert Bağlantı
• wet grinding
• long working life
• narrow grinding coatings
• rough grains
• high concentrations
• long working life

In consideration of the operating conditions applied both have to be match to each other in such a way that the abrasive grits are held in the bond as long as they stil have or generate edges.When the grits are worn and become unusable as an abrasive,they have to be released from the bond. If the grinding wheel adapted in this way it gives the highest performance,low wear and reduced grinding forces. If the worn grit remain in the bond too long, the grinding wheel loses its cutting ability.And also if the bond wears faster than the abrasive grits or it doesn’t hold them long enough the abrasive grits can’t be used with the highest performance and the service life of the grinding wheel is reduced.There are 4 types of bonds. The bond can be resin, sintered metal, ceramic or galvanic bond. In our production programme we use 2 kinds of bonds.

Grinding wheels in resin bond are much free-cutting and therefore they are preferably used as diamond wheels for grinding of hard metal or hard metal steel combinations or as CBN wheels for super-speed steels. They Excel by high cutting capacity and a grinding process, careful for the material. Resin bonded wheels are, however, more susceptible to high thermal and mechanic stres than metal bonded wheels. For diamond B51-B52-B53-B73-B74-B42. For CBN B51-B54-B53-B75-B76-B42.

B) SİNTERED METAL BOND: