Roll changing apparatus and roll changing method for rolling mill
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsSatoshi Mukaigawa, Mikio Yamamoto, Osamu Yoshihara
Life of this patent
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Abstract
A roll changing apparatus for a four-high rolling mill comprises rails, provided in a rolling mill stand and on a work side of the rolling mill, for incoming and outgoing of a work roll assembly and a backup roll assembly, and a pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal for both of work rolls and backup rolls. The roll changing apparatus can be modified into a side shift type roll changing apparatus with ease, at a low cost, and in a short time.
Claims12
A roll changing apparatus for a rolling mill, comprising:
- rails, provided in a stand of the rolling mill and on a work side of the rolling mill, for incoming and outgoing of a work roll assembly and a backup roll assembly;
- and
- a pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal for both of work rolls and backup rolls,
- wherein the rails for incoming and outgoing of the backup roll assembly in the rolling mill stand can be raised and lowered by hoisting and lowering means, a lower backup roll chock is equipped with a connecting fitting which can be connected to a drive end of the pusher at a raised position of the lower backup roll chock, and fixed rails for incoming and outgoing of the backup roll assembly on the work side are provided at a height consistent with a raised height of the rails for incoming and outgoing of the backup roll assembly in the rolling mill stand.
A roll changing apparatus for a rolling mill, said roll changing apparatus being a side shift roll changing apparatus installed on a work side of the rolling mill, comprising:
- a shift table capable of aligning with a roll axis line position of the rolling mill;
- and
- shifting rails provided on a floor and a bottom of a backup roll pulling-out pit dividedly in a shifting direction in order to support the shift table at a required height, and wherein
- the shift table is shifted nearly horizontally in the pit by drive means while extending over a floor rail portion and a pit bottom rail portion.
A roll changing apparatus of a side shift type for a rolling mill, installed on a work side of the rolling mill, comprising:
- rails, provided in a stand of the rolling mill and on a work side of the rolling mill, for incoming and outgoing of a work roll assembly and a backup roll assembly;
- a pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal for both of work rolls and backup rolls;
- a shift table capable of aligning with a roll axis line position of the rolling mill;
- and
- shifting rails provided on a floor and a bottom of a backup roll pulling-out pit dividedly in a shifting direction in order to support the shift table at a required height, and wherein
- the shift table is shifted nearly horizontally in the pit by drive means while extending over a floor rail portion and a pit bottom rail portion.
A roll changing method for a rolling mill, used in operating a roll changing apparatus of a side shift type installed on a work side of the rolling mill and having a shift table to be aligned with a roll axis line position of the rolling mill, comprising:
- actuating a work roll assembly and a backup roll assembly by a single pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal, whereby the work roll assembly and the backup roll assembly are admitted into or withdrawn from a rolling mill stand, and
- shifting the shift table by moving the shift table on shifting rails provided on a floor and a bottom of a backup roll pulling-out pit dividedly in a shifting direction.
Dependencies are inferred from the claim text.