US3541830A - Rolling mill roll changing - Google Patents

Rolling mill roll changing Download PDF

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Publication number
US3541830A
US3541830A US730025A US3541830DA US3541830A US 3541830 A US3541830 A US 3541830A US 730025 A US730025 A US 730025A US 3541830D A US3541830D A US 3541830DA US 3541830 A US3541830 A US 3541830A
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US
United States
Prior art keywords
roll
chocks
rolls
work
rolling mill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US730025A
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English (en)
Inventor
Heinrich Bohnenkamp
Otto Modder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siegener Maschinenbau GmbH
Original Assignee
Siegener Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siegener Maschinenbau GmbH filed Critical Siegener Maschinenbau GmbH
Application granted granted Critical
Publication of US3541830A publication Critical patent/US3541830A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/106—Vertical displacement of rolls or roll chocks during horizontal roll changing

Definitions

  • This disclosure provides a work roll chock configuration for a 2- or 4-high rolling mill to facilitate changing of the work rolls as a unit from the mill.
  • the upper work roll chocks have lower surfaces constructed at each side of the chocks with stepped surfaces such that in the direction of the roll axes one surface projects from the chock relative to the other surface.
  • the lower work roll chocks have upper surfaces constructed at each side of the chocks with stepped surfaces such that in the direction of the roll axes one surface is recessed in the chock relative to the other surface.
  • the stepped surfaces complement each other and, during roll changing, the lower roll and chocks are axially shifted to form a stable roll unit by locating the projecting surfaces of the upper roll chocks on the nonrecessed surfaces of the lower roll chocks.
  • the spacers are, under common practice, placed between the chocks manually by a workman, resulting in a cumbersome and time-consuming task because not only must suitably dimensioned spacers be available in advance of roll changing, but also the insertion and removal of the spacers must be performed manually at certain areas of the mill that are not readily accessible.
  • a rolling mill comprising a pair of housings having windows for receiving upper and lower roll assemblies, including an upper roll having a bearing chock at each end supported by the housing and a lower roll having a bearing chock at each end supported by the housing, each of the upper roll chocks having stepped lower surfaces, one surface recessed relative to the other in the direction of the axis of the upper roll.
  • Each of the lower roll chocks have stepped upper surfaces, one surface projecting relative to the other in the direction of the axis of the lower roll.
  • the stepped surfaces of the upper roll and the lower roll chocks complement each other when in their operative locations, and means for axially displacing the lower roll assembly relative to the upper roll assembly to position the nonrecessed and projecting surfaces of the respective chocks above each other for mutual supporting contact to thereby maintain the upper roll spaced from the lower roll.
  • roll adjusting screws or hydraulic roll balancing piston cylinder assemblies for lifting of the upper roll assembly in the roll housing prior to axial movement of the lower roll assembly, which is preferably accomplished by the roll changing device.
  • ledge-type protrusions project into the housing windows on both sides in which are mounted hydraulic roll elevating means to effect the lifting of the upper roll assembly incident to changing the rolls and for balancing the weight of the upper roll assembly during the rolling operation.
  • a further aspect of the present invention resides in constructing the relative height of the stepped surfaces in the lower roll chocks greater in magnitude than that of the complementary stepped surfaces in the upper roll chocks, whereby during the rolling operation, the opening between the rolls can be adjusted to a dimension of zero and during the changing of the rolls, the rolls are held out of mutual contact.
  • the present invention also provides that the stepped surfaces of the lower work roll chocks are arranged such that the nonrecessed surface adjoins the body portion of the roll at the operators side of the mill and, at the drive 1said; of the mill, the recessed surface adjoins the roll
  • the stepped surfaces in each of the upper and lower roll chocks are constructed in equally-spaced vertical planes spaced from the vertical plane containing the rotational axes of the rolls.
  • FIG. 1 is an elevational view of a Z-high mill incorporating the features of the present invention
  • FIG. 2 is an elevational view similar to FIG. 1 but illustrating the upper roll lifted from its operational position and a lower roll axially shifted,
  • FIG. 3 is an elevational view similar to FIG. 2 illustrating the upper and lower roll positioned for changing the rolls as a unit from the roll housings,
  • FIG. 4 is an enlarged sectional view taken along line IV-1V of FIG. 1, and
  • FIG. 5 is a side elevational view of a second embodiment of the present invention relating to a 4-high rolling mill stand.
  • FIG. 1 of the drawings there is illustrated the essential components of a rolling mill constructed in accordance with the present invention.
  • an upper roll 3 supported in the housing by bearing chocks 5.
  • a lower roll 4 is supported in the housings by the bearing chocks 6.
  • the bearing chocks 5 of the upper roll are suspended from the ends of adjusting screws 7, while the bearing chocks 6 of the lower roll rest against adjusting screws 8.
  • the screws 7 and 8 serve to adjust the roll opening and simultaneously take the rolling pressure.
  • the screws 7 illustrated in FIG. 1 are also employed to lift the upper roll 3 by its chocks 5 when the rolls 3 and 4 are to be removed as a unit from the roll housings.
  • the upper roll bearing chocks 5 are constructed on their lower surface with stepped surfaces 9 and 10, the surface 10 projecting from the surface 9.
  • the lower roll bearing chocks 6 are constructed with stepped surfaces 11 and 12 arranged such that the surface 12 is recessed relative to the surface 11.
  • the surfaces 9 and 10 of the chocks 5 assume a meshing relationship with the surfaces 11 and 12 of the chocks 6.
  • the height or change in elevation between the surfaces 9 and 10, and also surfaces 11 and 12, is such that the opening between the rolls 3 and 4 can be reduced to zero during the rolling operation without the surfaces 9 contacting the surfaces 11 and the surfaces 10 contacting the surfaces 12.
  • the surfaces 10, which are projecting from the chocks 5, and the surfaces 12, which are recessed in the chocks 6, are located towards the operators side of the mill, which is to the left of the surfaces 9 and 11.
  • the stepped surfaces 9 and 10, and also 11 and 12 do not extend the full width of their respective chocks.
  • the surfaces 10 projecting from the 4 chocks 5 and the surfaces 12 recessed in the chocks 6 extend only a short distance across the width of the chocks from their outside vertical surfaces. In contrast to this the surfaces 9 recessed in the chocks 5 and the surfaces 11 projecting from the chock 6 extend over a substantial part of the chocks total width.
  • the chocks 5 for the upper roll 3 are positioned to be supported on the chocks 6 for the lower roll 4, in which position the stepped surfaces 10 projecting from the chocks 5 engage the surfaces 11 on the chocks 6.
  • the rolls 3 and 4 are separated from each other to not only prevent damage to their working surface that would otherwise occur if in mutual contact, but also the rolls and chocks are arranged as a stable unit to facilitate their removal and replacement.
  • the upper roll 3 is lifted by the screws 7 until the surface 10 of the chocks 5 is raised above the surface 11 of the chocks 6.
  • the lower roll 4 and its chocks 6 are displaced in an axial direction by a roll changing device 13, per se well known in the art, until the surfaces 11 are vertically aligned with the surfaces 10 as illustrated in FIG. 2.
  • the upper roll and chocks are then lowered by the screws 7 until the surfaces 10 engage the surfaces 11, which relative position is illustrated in FIG. 3.
  • the rolls 3 and 4 with their chocks can be readily pushed from the housing Windows 1 by the device 13 and a similarly arranged pair of replacement roll assemblies can be pulled into the windows of the mill housings.
  • the present invention enables changing of rolls without requiring the use of manual labor by remote control of the screws and the roll changing device. This has an additional advantage of reducing the time required to change the rolls.
  • FIG. 5 illustrates a 4-high rolling mill stand and represents a second embodiment of the present invention wherein a different means is provided for moving the chocks vertically.
  • the upper work roll 3' is elevated by the hydraulic piston cylinder assemblies 14 which also serve during the rolling operation to balance the weight of the upper roll.
  • These piston cylinder assemblies are carried by projections 15 protruding from the housing Windows 1'. In this arrangement, the rolls are changed without requiring the disconnection of hoses and the like for transmitting the hydraulic pressure maximnn to the piston cylinder assemblies.
  • roll adjusting piston cylinder assemblies 17 are employed to urge the lower work roll 4 towards the lower support roll in addition to raising the lower work roll 4 from the lower support roll during changing of the Work rolls.
  • a rolling mill comprising:
  • each chock of one of said work rolls having a dimension normal to the axis of the roll sufficient to keep a bearing chock supported thereby from tilting;
  • a rolling mill according to claim 1 wherein said means for causing the chocks to engage each other comprises adjusting screws engaging the chocks for said one work roll.
  • each chock for said one work roll includes projecting surfaces horizontally spaced from the vertical plane containing the axis of rotation of said work rolls.
  • a rolling mill according to claim 1 further comprising:
  • said means for locating comprising piston cylinder assemblies carried by said housing projections.
  • a rolling mill according to claim 6 comprising:
  • an upper supporting roll assembly including an upper backup roll and bearing chocks for supporting said one work roll;
  • a lower supporting roll assembly including a lower backup roll and bearing chocks for supporting said other work roll.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
US730025A 1967-05-29 1968-05-17 Rolling mill roll changing Expired - Lifetime US3541830A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DES0110061 1967-05-29
DES0100061 1967-05-29
GB2041869 1969-04-22

Publications (1)

Publication Number Publication Date
US3541830A true US3541830A (en) 1970-11-24

Family

ID=27212957

Family Applications (1)

Application Number Title Priority Date Filing Date
US730025A Expired - Lifetime US3541830A (en) 1967-05-29 1968-05-17 Rolling mill roll changing

Country Status (5)

Country Link
US (1) US3541830A (enrdf_load_stackoverflow)
BE (1) BE715580A (enrdf_load_stackoverflow)
DE (1) DE1602145C3 (enrdf_load_stackoverflow)
FR (1) FR1569363A (enrdf_load_stackoverflow)
GB (1) GB1266442A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736785A (en) * 1970-05-08 1973-06-05 Siemag Siegener Masch Bau Rolling mill
US3759078A (en) * 1971-06-26 1973-09-18 Siemag Siegener Masch Bau Roll supporting means for a rolling mill
US5800088A (en) * 1995-01-30 1998-09-01 Mannesmann Aktiengesellschaft Quick-changing device for roll disks

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140929A (en) * 1936-04-17 1938-12-20 United Eng Foundry Co Rolling mill
US3309909A (en) * 1963-02-06 1967-03-21 Wilson Alexander Ian Mills for rolling metal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140929A (en) * 1936-04-17 1938-12-20 United Eng Foundry Co Rolling mill
US3309909A (en) * 1963-02-06 1967-03-21 Wilson Alexander Ian Mills for rolling metal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736785A (en) * 1970-05-08 1973-06-05 Siemag Siegener Masch Bau Rolling mill
US3759078A (en) * 1971-06-26 1973-09-18 Siemag Siegener Masch Bau Roll supporting means for a rolling mill
US5800088A (en) * 1995-01-30 1998-09-01 Mannesmann Aktiengesellschaft Quick-changing device for roll disks

Also Published As

Publication number Publication date
BE715580A (enrdf_load_stackoverflow) 1968-10-16
DE1602145C3 (de) 1973-12-06
DE1602145B2 (de) 1973-05-24
GB1266442A (enrdf_load_stackoverflow) 1972-03-08
FR1569363A (enrdf_load_stackoverflow) 1969-05-30
DE1602145A1 (de) 1970-01-15

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