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US 6,988,937 B2Granted
Method of roll grinding
AssigneeSaint-Gobain Abrasives Technology Company
InventorsAnne M. Bonner, Dean S. Matsumoto, Edward L. Lambert, Eric Bright
Life of this patent
Estimating the term…
Abstract
Grinding of mill rolls is carried out with chatter resistant abrasive grinding wheels having relatively low elastic modulus values and relatively high burst speed values. Grinding operations may be carried out at high efficiency with controlled wheel vibration, thus generating optimum surface quality on the ground mill rolls.
Claims52
A method of grinding mill rolls, comprising the steps:
- a) providing a grinding wheel comprising abrasive grain, phenolic resin bond, 36 to 54 volume % porosity, a maximum cured density of 2.0 g/cc and a burst speed of at least 6000 sfpm;
- b) mounting the wheel on a roll grinding machine;
- c) bringing the wheel into contact with a rotating mill roll having a cylindrical surface;
- d) traversing the wheel across the surface of the mill roll, maintaining continuous contact of the wheel with the surface of the mill roll;
- and
- e) grinding the surface of the mill roll to a surface finish value of 10 to 50 Ra, while leaving the surface substantially free of feed lines, chatter marks and surface irregularities.
3 more elements
A method of grinding mill rolls, comprising the steps:
- a) providing a grinding wheel comprising at least 20 volume % agglomerates of abrasive grain, organic resin bond and 38 to 54 volume % porosity;
- b) mounting the wheel on a roll grinding machine;
- c) bringing the wheel into contact with a rotating mill roll having a cylindrical surface;
- d) traversing the wheel across the surface of the mill roll, maintaining continuous contact of the wheel with the surface of the mill roll;
- and
- e) grinding the surface of the mill roll to a surface finish value of 10 to 50 Ra, while leaving the surface substantially free of feed lines, chatter marks and surface irregularities.
3 more elements
A method of grinding mill rolls, comprising the steps:
- a) providing a grinding wheel comprising 22 to 40 volume % abrasive grain and 36 to 54 volume % porosity bonded in an organic resin bond, and having a maximum elastic modulus value of 12 GPa and a minimum burst speed of 6000 sfpm;
- b) mounting the wheel on a roll grinding machine and rotating the wheel;
- c) bringing the wheel into contact with a rotating mill roll having a cylindrical surface;
- d) traversing the wheel across the surface of the mill roll, maintaining continuous contact of the wheel with the surface of the mill roll;
- and
- e) grinding the surface of the mill roll to a surface finish value of 10 to 50 Ra, while leaving the surface substantially free of feed lines, chatter marks and surface irregularities.
3 more elements
A method of grinding mill rolls, comprising the steps:
- a) providing a grinding wheel comprising 22 to 40 volume % abrasive grain and 36 to 54 volume % porosity bonded in an organic resin bond, and having a maximum elastic modulus value of 12 GPa and a minimum burst speed of 6000 sfpm;
- b) mounting the wheel on a roll grinding machine and rotating the wheel;
- c) bringing the wheel into contact with a rotating mill roll having a cylindrical surface;
- d) traversing the wheel across the surface of the mill roll, maintaining continuous contact of the wheel with the surface of the mill roll;
- e) grinding the surface of the mill roll;
- and
- f) repeating steps c) to e);
- wherein the wheel remains substantially free of chatter as the wheel is consumed by the grinding steps.
5 more elements
Dependencies are inferred from the claim text.