Apparatus for urging an oil film bearing onto and off of a roll neck in a rolling mill
An apparatus for urging an oil film bearing onto and off of a roll neck in a rolling mill comprises an annular hydraulically actuated piston/cylinder unit mounted on a cylindrical section of the roll neck. The cylindrical neck section is delimited at one end by a circular shoulder on the roll neck, and at the opposite end by a circular groove in the roll neck. A retaining ring has lock arms pivotally movable into seated positions in the groove. The piston/cylinder unit is operable in a first mode in an abutting relationship with the lock arms to urge the bearing onto the roll neck, and is operative in a second mode in an abutting relationship with the shoulder to urge the bearing off of the roll neck. The piston/cylinder unit and the lock arms having complimentary tapered surfaces arranged to coact in urging the lock arms inwardly into their seated positions in response to the abutment of the piston/cylinder unit with the lock arms.
1. Apparatus for urging an oil film bearing onto and off of a roll neck in a rolling mill, said apparatus comprising:
an annular hydraulically actuated piston/cylinder unit mounted on a cylindrical section of the roll neck, said cylindrical section being delimited at one end by a circular shoulder on the roll neck, and at the opposite end by a circular groove in the roll neck;
a retaining ring having lock arms pivotally movable into seated positions in said groove, said piston/cylinder unit being operable in a first mode in an abutting relationship with said lock arms to urge said bearing onto said roll neck, and being operative in a second mode in an abutting relationship with said shoulder to urge said bearing off of said roll neck; and
said piston/cylinder unit and said lock arms having complimentary tapered surfaces arranged to coact in urging said lock arms inwardly into said seated positions in response to the abutment of said piston/cylinder unit with said lock arms.
2. The apparatus of claim 1 further comprising resiliently compressible means at the bottom of said groove, said resiliently compressible means acting in response to the inward urging of said lock arms by the coaction of said complimentary tapered surfaces to provide an interference fit between the base of said groove and said lock arms.