Rolling machine and rolling method

A rolling machine comprising:

• a pair of upper and lower working rolls;
• a pair of upper and lower intermediate rolls supporting said working rolls, respectively;
• a pair of upper and lower reinforcing rolls supporting said intermediate rolls, respectively, said pair of reinforcing rolls having an effective barrel length smaller than an effective barrel length of said working rolls and said intermediate rolls, and larger than a width of a minimum-width strip to be rolled;
• said pair of intermediate rolls being arranged in such a manner that their axes, disposed respectively in substantially horizontal planes, cross each other, and are disposed to be crossed relative to said pair of working rolls and said pair of reinforcing rolls;
• and
• intermediate roll cross angle-adjusting means for adjusting a maximum cross angle of said intermediate rolls as a function of a width of strip to be rolled.

A rolling method of rolling by supporting a pair of upper and lower working rolls respectively by a pair of upper and lower intermediate rolls, and supporting said intermediate rolls respectively by a pair of upper and reinforcing rolls, said method comprising the steps of:

• providing said pair of reinforcing rolls having an effective barrel length which is smaller than an effective barrel length of said working rolls and said intermediate rolls, and is larger than a width of a minimum-width strip to be rolled;
• arranging, in the rolling of the strip, said pair of intermediate rolls in such a manner that their axes, disposed respectively in substantially horizontal planes, cross each other, and are crossed relative to said pair of working rolls and said pair of reinforcing rolls;
• and
• adjusting a maximum cross angle of said intermediate rolls as a function of a width of a strip to be rolled by intermediate roll cross angle-adjusting means.

A rolling machine comprising:

• a pair of upper and lower working rolls;
• a pair of upper and lower reinforcing rolls;
• one intermediate roll provided between said upper working roll and said upper reinforcing roll or between said lower working roll and said lower reinforcing roll, said intermediate roll being arranged in such a manner that said intermediate roll, disposed in a substantially horizontal plane, is disposed to be crossed relative to said pair of working rolls and said pair of reinforcing rolls;
• and
• intermediate roll cross angle-adjusting means for adjusting a maximum cross angle of said intermediate roll as a function of a width of a strip to be rolled;
• said reinforcing roll, disposed adjacent to said intermediate roll, having an effective barrel length smaller than an effective barrel length of said working rolls and said intermediate roll, and larger than a width of a minimum-width strip to be rolled.

A rolling method of rolling by providing one intermediate roll between an upper working roll and an upper reinforcing roll or between a lower working roll and a lower reinforcing roll, said method comprising the steps of:

• preparing said reinforcing roll, disposed adjacent to said intermediate roll, having an effective barrel length which is smaller than an effective barrel length of said working rolls and said intermediate roll, and is larger than a width of a minimum-width strip to be rolled;
• and
• arranging, in the rolling of the strip, said intermediate roll in such a manner that said intermediate roll, disposed in a substantially horizontal plane, is crossed relative to said pair of working rolls and said pair of reinforcing rolls;
• and
• adjusting a maximum cross angle of said intermediate roll as a function of a width of a strip to be rolled by intermediate roll cross angle-adjusting means.

A rolling machine comprising:

• a pair of upper and lower working rolls for rolling a strip, said working rolls having a predetermined effective barrel length;
• a pair of upper and lower intermediate rolls supporting said working rolls, respectively, said intermediate rolls having a predetermined effective barrel length;
• a pair of upper and lower reinforcing rolls supporting said intermediate rolls, respectively, said reinforcing rolls having an effective barrel length which is smaller than the effective barrel length of said working rolls and said intermediate rolls, and is larger than a width of a minimum-width strip to be rolled;
• and
• an intermediate roll cross device for crossing axes of said pair of intermediate rolls, disposed respectively in substantially horizontal planes, relative to a direction of the width of the strip to be rolled, said intermediate roll cross device being provided with intermediate roll adjusting means for adjusting a maximum cross angle as a function of a width of the strip to be rolled.

A rolling machine comprising:

• a pair of upper and lower working rolls for rolling a strip, said working rolls being arranged substantially parallel to a direction of a width of the strip to be rolled;
• a pair of upper and lower intermediate rolls supporting said working rolls, respectively;
• a pair of upper and lower reinforcing rolls supporting said intermediate rolls, respectively, said reinforcing rolls having an effective barrel length which is smaller than the effective barrel length of said working rolls and said intermediate rolls, and is larger than a width of a minimum-width strip to be rolled;
• and
• an intermediate roll cross device for crossing axes of said pair of intermediate rolls, disposed respectively in substantially horizontal planes, relative to a direction of the width of the strip to be rolled, said intermediate roll cross device being provided with intermediate roll adjusting means for adjusting a maximum cross angle as a function of a width of the strip to be rolled.

A rolling machine comprising:

• a pair of upper and lower working rolls for rolling a strip, said working rolls having a predetermined effective barrel length;
• a pair of upper and lower intermediate rolls supporting said working rolls, respectively, said intermediate rolls having a predetermined effective barrel length;
• a pair of upper and lower reinforcing rolls supporting said intermediate rolls, respectively, said reinforcing rolls having an effective barrel length which is smaller than the effective barrel length of said working rolls and said intermediate rolls;
• an intermediate roll cross device for crossing axes of said pair of intermediate rolls, disposed respectively in substantially horizontal planes, relative to a direction of a width of the strip to be rolled;
• and
• a cross angle control device for adjusting an amount of the maximum cross angle of said intermediate rolls in accordance with the width of the strip to be rolled.