Rolling mill equipped with on-line roll grinding system and grinding wheel

A rolling mill equipped with an on-line roll grinding system comprising:

• a grinding wheel positioned to face one of a pair of mill rolls for grinding said mill roll;
• grinding wheel moving means for pressing said grinding wheel against said mill roll;
• and
• grinding wheel traverse means for moving said grinding wheel in the axial direction of said mill roll;
• wherein said grinding wheel comprises a wheel disk and an abrasive layer formed on one side of said wheel disk facing said mill roll;
• said wheel disk having an elastically deforming function to absorb vibration transmitted from said mill roll;
• and
• said on-line roll grinding system further comprising load detecting means for measuring a contact force between said grinding wheel and said mill roll;
• and
• means for controlling said grinding wheel moving means so that the contact force measured by said load detecting means is held constant;
• and
• for simultaneously controlling said grinding wheel traverse means to change a traverse speed of said grinding wheel in the roll axial direction so that a grinding rate of said grinding wheel on said mill roll is changed, for thereby grinding said mill roll into a predetermined roll profile.

A rolling mill equipped with an on-line roll grinding system according to claim 5, further comprising:

• at least one of roll bender means for applying bender forces to said mill roll;
• roll shifting means for shifting said mill roll in the axial direction and roll cross means for making said pair of mill rolls crossed with respect to each other;
• and
• control means for controlling at least one of the bender forces of said roll bender means;
• a shift position set by said roll shifting means and a cross angle set by said roll cross means based on a profile of said mill roll measured by an on-line profile meter so that a strip crown approaches a target strip crown.

A rolling mill equipped with an on-line roll grinding system comprising:

• a grinding wheel positioned to face one of a pair of mill rolls for grinding said mill roll;
• grinding wheel moving means for pressing said grinding wheel against said mill roll;
• and
• grinding wheel traverse means for moving said grinding wheel in the axial direction of said mill roll;
• wherein said grinding wheel comprises a wheel disk and an abrasive layer formed on one side of said wheel disk facing said mill roll;
• said wheel disk having an elastically deforming function to absorb vibration transmitted from said mill roll;
• and
• said on-line roll grinding system further comprising means for calculating a deviation of a profile of said mill roll measured by an on-line profile meter from a present target roll profile;
• and
• controlling at least one of said grinding wheel moving means and said grinding wheel traverse means based on the calculated deviation so that a grinding rate of said grinding wheel on said mill roll is changed, for thereby grinding said mill roll to be identical with said target roll profile.

A rolling method by use of a rolling mill equipped with an on-line roll grinding system comprising:

• a grinding wheel positioned to face one of a pair of mill rolls for grinding said mill roll;
• grinding wheel moving means for pressing said grinding wheel against said mill roll;
• and
• grinding wheel traverse means for moving said grinding wheel in the axial direction of said mill roll;
• said grinding wheel comprising a wheel disk and an abrasive layer formed on one side of said wheel disk facing said mill roll;
• said wheel disk having an elastically deforming function to absorb vibration transmitted from said mill roll, wherein the method comprises the steps of:
• measuring a contact force between said grinding wheel and said mill roll;
• and
• controlling an amount of movement by said grinding wheel moving means to change the contact force measured by said load detecting means, for thereby grinding said mill roll into a predetermined roll profile while rolling a strip.