Hydraulically actuated tool for mounting and dismounting rolling mill roll neck bearings

• US 6,415,489 B1
• Filed: 06/28/2000
• Issued: 07/09/2002
• Est. Priority Date: 07/29/1999
• Status: Expired due to Term

• Current Assignee: Primetals Technologies USA LLC (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Morgan Construction Company (Siemens AG)
• Inventors: Osgood, Peter N., Martins, Armando S.
• Primary Examiner(s): Watson, Robert C.
• Application Number:
  US09/605,601
• Time in Patent Office: 741 Days
• Field of Search: 298/95, 298/951, 292/52, 292/63, 292/82
• US Class Current: 29/252
• CPC Class Codes: B21B 2203/30 Quick or bayonet couplings
• CPC Class Codes: B21B 31/074 Oil film bearings, e.g. "Morgoil" bearings
• CPC Class Codes: B21B 31/08 Interchanging rolls, roll mountings, or stand frames , e.g. using C-hooks; Replacing roll chocks on roll shafts
• CPC Class Codes: F16C 2322/12 Rolling apparatus, e.g. rolling stands, rolls
• CPC Class Codes: F16C 35/078 using pressure fluid as mounting aid
• CPC Class Codes: Y10T 29/5383 having fluid operator

Abstract

A tool is disclosed for axially urging a bearing assembly into and out of a seated position on the neck of a roll in a rolling mill. The tool includes a piston surrounded by a cylinder. The piston is removably fixed to the roll neck and is configured to internally subdivide the cylinder into first and second chambers. Fluid conduits are arranged to alternatively pressurize the first and second chambers to alternatively shift the cylinder with respect to the thus fixed piston in opposite first and second directions. Movement of the cylinder in the first direction urges the bearing assembly into its seated position, and movement of the cylinder in the opposite second direction dislodges the bearing assembly from its seated position.

Claims

1. Apparatus for axially urging a bearing assembly into and out of a seated position on the neck of a roll in a rolling mill, said roll neck having an end which protrudes axially from the bearing assembly when the bearing assembly is in said seated position, said apparatus comprising:

a piston surrounded by a cylinder, said piston being configured to internally subdivide said cylinder into axially separated first and second chambers;

attachment means for removably fixing said piston to the end of said roll neck;

fluid means for alternatively pressurizing said first and second chambers to alternatively shift said cylinder with respect to the thus fixed piston in opposite first and second directions;

first force exerting means responsive to shifting of said cylinder in said first direction for engaging and axially urging said bearing assembly into said seated position; and

second force exerting means responsive to shifting of said cylinder in said second direction for engaging and axially urging said bearing assembly out of said seated position.

3. The apparatus as claimed in claim 1 or 2 wherein said first force exerting means comprises a first ring extending axially from said cylinder.

4. The apparatus as claimed in claim 3 wherein said first ring includes circumferentially spaced tines configured to protrude axially through complimentary spaced slots in said threaded ring.

5. The apparatus as claimed in claim 3 wherein said first ring is carried by and fixed relative to said cylinder.

6. The apparatus as claimed in claim 1 or 2 wherein said second force exerting means comprises a second ring having one end threadedly engageable with said ring and having an opposite end axially engageable by said cylinder.

7. The apparatus as claimed in claim 6 wherein said second ring is carried by and axially shiftable with respect to said cylinder.

8. The apparatus as claimed in claim 1 or 2 wherein said piston, said cylinder and said first and second force exerting means are integrally combined into a unitary hydraulically actuated tool assembly.

9. The apparatus as claimed in claim 1 or 2 wherein said attachment means comprises a locking screw threaded into the end of said roll neck.

2. Apparatus for axially urging a bearing assembly into and out of a seated position on the neck of a roll in a rolling mill, wherein the roll neck has an end which protrudes axially from the bearing assembly when the bearing assembly is in its seated position, and wherein the bearing assembly includes an externally threaded ring having circumferentially spaced radially inwardly protruding lugs coacting in a bayonet connection with circumferentially spaced radially outwardly protruding lugs fixed with respect to the roll neck, the threaded ring being rotatable on the roll neck between an engaged position at which said inwardly and outwardly protruding lugs are aligned circumferentially to axially retain the threaded ring on the roll neck, and a disengaged position at which said inwardly and outwardly protruding lugs are offset circumferentially to accommodate axial removal of the threaded ring from the roll neck, with a lock nut threaded onto the threaded ring, the lock nut being engageable with first and second axial thrust components of the bearing assembly said apparatus comprising:

a piston surrounded by a cylinder, said piston being configured to internally subdivide said cylinder into axially separated first and second chambers;

attachment means for removably fixing said piston to the end of the roll neck;

fluid means for alternatively pressurizing said first and second chambers to alternatively shift said cylinder with respect to the thus fixed piston in opposite first and second directions;

first force exerting means responsive to shifting of said cylinder in said first direction for acting via said first thrust component to axially urge the bearing assembly into its seated position; and

second force exerting means responsive to shifting of said cylinder in said second direction for acting via said threaded ring, said locknut and said second thrust component to axially urge the bearing assembly out of its seated position.