Method and apparatus of dressing a grinding wheel

An apparatus for dressing a grinding wheel, comprising:

• driving means for rotating a grinding wheel to be trued and dressed;
• a truing tool for truing the grinding wheel;
• and
• liquid coolant supplying means for supplying a liquid coolant between the truing tool and a surface of the grinding wheel, said liquid coolant cools the truing tool and the grinding wheel and contains dispersed abrasive grains for dressing the grinding wheel,
• wherein said liquid coolant supplying means supplies the liquid coolant containing the abrasive grains for dressing, said abrasive grains having averaged grain diameter satisfying the following relationship:
• (LO−SO)<S<(L02/3S0)
• where S denotes the averaged grain diameter of the abrasive grains for dressing;
• LO denotes averaged grain interval of the grinding wheel;
• and SO denotes averaged grain diameter of the grinding wheel.

A method of dressing a grinding wheel, comprising:

• truing the grinding wheel using a truing tool;
• and
• feeding a liquid coolant for cooling the grinding wheel and the truing tool containing dispersed abrasive grains for dressing the grinding wheel into a space between the truing tool and a surface of the grinding wheel,
• wherein said liquid coolant remains in a liquid state at room temperature and atmospheric pressures in the space between the truing tool and the surface of the grinding wheel.

An apparatus for dressing a grinding wheel, comprising:

• driving means for rotating a grinding wheel to be trued and dressed;
• a truing tool for truing the grinding wheel;
• and
• liquid coolant supplying means for supplying a liquid coolant between the truing tool and a surface of the grinding wheel, said liquid coolant is for cooling the truing tool and the grinding wheel and contains dispersed abrasive grains for dressing the grinding wheel,
• wherein said liquid coolant supplying means supplies the liquid coolant which remains in a liquid state at room temperature and atmospheric pressures in the space between the truing tool and the surface of the grinding wheel.

A method of dressing a grinding wheel when the grinding wheel is trued by using a truing tool, comprising:

• feeding a liquid coolant containing dispersed abrasive grains for dressing the grinding wheel, into a space between the truing tool and a surface of the grinding wheel, to cool the grinding wheel and the truing tool;
• collecting the liquid coolant used for cooling the grinding wheel and the truing tool;
• and
• recirculating the collected liquid coolant for feeding it into the space between said truing tool and the surface of said grinding wheel,
• wherein an averaged grain diameter of the abrasive grains for dressing is selected in such a way that the following relationship is satisfied:
• (LO−SO)<S<(L02/3S0)
• where S denotes the averaged grain diameter of the abrasive grains for dressing;
• LO denotes an averaged grain interval of the grinding wheel;
• and SO denotes an average grain diameter of the grinding wheel.

An apparatus for dressing a grinding wheel, comprising:

• driving means for rotating the grinding wheel to be trued and dressed;
• a truing tool for truing the grinding wheel;
• liquid coolant supplying means for supplying a liquid coolant between the truing tool and a surface of the grinding wheel, said liquid coolant being for cooling the truing tool and the grinding wheel and containing dispersed abrasive grains for dressing the grinding wheel;
• liquid coolant collecting means for collecting the liquid coolant used for cooling the truing tool and the grinding wheel;
• and
• liquid coolant recirculating means for recirculating the collected liquid coolant for feeding it into the space between the truing tool and the surface of the grinding wheel,
• wherein said liquid coolant supplying means supplies the liquid coolant containing the abrasive grains for dressing whose averaged grain diameter satisfies the following relationship:
• (LO−SO)<S<(L02/3S0)
• where S denotes the averaged grain diameter of the abrasive grains for dressing;
• LO denotes averaged grain interval of the grinding wheel;
• and SO denotes averaged grain diameter of the grinding wheel.