CA1044172A - Roll changing apparatus for a rolling mill or the like - Google Patents
Roll changing apparatus for a rolling mill or the likeInfo
- Publication number
- CA1044172A CA1044172A CA244,913A CA244913A CA1044172A CA 1044172 A CA1044172 A CA 1044172A CA 244913 A CA244913 A CA 244913A CA 1044172 A CA1044172 A CA 1044172A
- Authority
- CA
- Canada
- Prior art keywords
- rolls
- car
- members
- mill
- roll
- 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
Links
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
- B21B31/103—Manipulators or carriages therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The apparatus relates to a rail guided car located on the operator's side of a rolling mill for removing and replacing a set of work rolls relative to the mill by engaging adjacent ends of the roll set. The car includes two members for supporting the rolls parallel to one another in a cantilever fashion and which can be readily and accurately adjusted for displacement either independently or in unison to align with varying roll centers. The car also includes a counterweight to offset the weight of the rolls as the rolls are adjusted and moved into and out of the mill.
The apparatus relates to a rail guided car located on the operator's side of a rolling mill for removing and replacing a set of work rolls relative to the mill by engaging adjacent ends of the roll set. The car includes two members for supporting the rolls parallel to one another in a cantilever fashion and which can be readily and accurately adjusted for displacement either independently or in unison to align with varying roll centers. The car also includes a counterweight to offset the weight of the rolls as the rolls are adjusted and moved into and out of the mill.
Description
This inven-tion is directed to steeL rolling mills, and ln particular to roll changiny apparatus for : -use in the Ini 11 o While automatic and ve:ry rapid work roll changiny devices have been provided in many recent 4-high rolling mills, many mills still employ porter bars or C~hooks to remove and replace the work rolls. Usually the rolls are removed one at a time, although porter bars are in : :
use -that remove and replace the rolls in pairs.
Porter bars and C-hooks require ths services of a ! mill crane which is not only very time consuming and ~ .
~, . .: .
prevents the crane from being used Eor other necessary :
purposes, but makes accurate guiding and positive handling of the roll or rolls impossible. This results in not only ~ :.
substantial delay in properly positioning the rolls in the .-mill and aligning the rolls with the couplings o~ the :.:
~, drivi.ng spindles, but permits the rolls to ~e banged about .~ -.. Z resulting in damage to the mill parts and to the rolls themselves including the back-up rollsO In order to remove the rolls from the mill they are required to be : :
, lifted from the lower back-up rolls in a very limited :~.
;~ space and when replaced they have to be lowered onto the ' lower back-up rollO In the past, during this operation ..
i very frequently the upper back-up roll was forcefuily hit !'.,~ '`: .
;i ~ by the upper work roll and the lower back-up roll with .. .
i the lower work roll resulting, in many cases, in damage :~
to the rolls~ .. : :
~I Notwithstanding the disadvantages of employing ~ :
C-hooks or porter bars to change the work rolls hereto- .~ -fore, until very recently this was the only course open .~
.. .. . .
~ to the industry other than the very expensive, fully ...
.~1 automatic arrangements, such as turntables and side- .
~k : ~', .--., " , , 7~
shifters, used with push or pull work roll extractors. ~ :
In addition to the very large initial capital eY~pense when attempts were made to adapt them to existiny mills, the automakic arrangements re~uirPd substantial alteration to the mill, Eor example, a redesigniny of the windows and bearing chocks to acco~modate the extractors and the ~; inclusion of roll supporting rails. More recently, a roll changing device has been proposed i.n which the roll supporti.ng and carryiny element ha~ two fixed roll receiving 10 portions and which necessi.tate the use o~ rep].aceable stools mounted between the chocks of the rolls when the j rolls are in the mill~
The present invention provides a device for changing one or more rolls of a rolliny mill which will . ~.
~ not require the services of a crane or alterations to I the mill itself and which will permit accurate, positive, .1 and relatively rapid removal and replacement of -the roll, thereby reducing the likelihood of possible damage to ~ the adjacent parts or to the roll~
:` 20 The present inventi.on provides a guided roll carrying car located on the operator's side of the mill -. .
I for removing and replacing a pair of rolls of the mill . : ;`
.. by engaging the ends of the rolls, the car including ~: .
:-` means for cantileverly supporting the rolls always . I , .
parallel to one another which means can be readily and ~¦ accurately adjusted for displacement either saparately `.
.. ,. . - ~
relative to one another or in unison to align with ~ :
~` varying roll centers, thereby e].iminating the stooling operation in the milla ~ ~:
In the present invention the car is provided . .
j with a counterweight to offset the weight o~` the rolls :~ ¦ as the rolls are adjusted for displacement and moved . ' ' ~ :
-~: -2-:~ :
~4~2 lnto and out of the Mill~ ;
Certain embodiments are described, reference being made to the accompanying drawings, wherein: :-FIGURE 1 i5 an elevational view, partly broken away, of a roll carrying car constructed in accordance with the present invention arranged on the operator's side of a rolling mill showing the car in one of its operative positions; :
FIGURE 2 is an enlarged plan view of the car shown in FIGURE l; and FIGURE 3 is an enlarged view of the central portion of FXGURE 2. ~:
In referring first to FIGURE 1, there is shown a worX roll changing car 10 being supported on a pair of spaced parallel rails 12 arranged on the operator's side -I of a rolling mill, not shown, and which sxtends from a ¦ position remote from the window.of the mill to a position adjacent thereto. The car engages the rails 12 by two .
pairs of wheels 14 and 16 and is driven by a rack and ~: :
pinion arrangement 18, which, in turn, is driven by a gear drive-electric motor assembly 19. While the other important elements of the car 10 will be described later .
in connection with FIGURES 2 and 3, sufficient at this :~
¦` point is to call attention to the roll carrying members 20 i ;~
and 21 mounted on the front of the car lOt each having ..
: an opening 22 and 23, respectively, for receiving the .. ¦
;:~ adjacent end 24 and 25 of two work rolls 26 of a rolling ~ i ~ mill for cantileverly supporting the rolls as a se-t : ~ during exchange of the rolls to and from the millO To ~ 30 the left of the car 10, as one view FIGURE 1, only a . ;:
. ::, ::"
small portion of the set of rolls 26 supported by a ~:
. :
platform 28 o~ a side-shifting device is shown, since i` . ~3~ ~ -~r~)4~
such devices are familiar to the art; an example o which is the ~ide-shiEter consisting oE two roll set supporting platforms which are moved to either side of the mill window during the roll changing operation as illustrated in U. S. Patent Mo~ 3,779,061 - C. S. Shumacher - dated December 18, 1973.
Returning now to complete the description o:E
the car 10, as more fully illustrated in FIGURES 2 and 3, and more particularly in FIGURE 3, in order to be able ~: 10 to rapidly but accurately adjust the roll carrying member 20 of the car 10, there is provided a screw 30 and nut 32 The nut 32 is securely mounted against rotation in the member 20 and the screw 30 is driven in and through both . the member 20 and nut 32 by a worm gear unit 34 connected ~:
;~ to an electric motor 36. As the screw 30 rotatesl it .
presses against a wear p].ate 38, loca-ted underneath the :
~ screw 30 and mounted on the top 40 oE the member 21. This ,~ pressing of the screw 30 against the wear plate 38 forces .
the member 20 to be raised a controllable distance corre- .
l 20 sponding to a desired center of an upper roll.
.l In order to assure that the member 20 will be I held against any tendency to rotate in the horizontal :
~, plane but still free to move vertically the member 20 `~ is provided with two opposed wings 41, shown only in .~
FIGURE 2, received in complimentary slots 43 -ormed in - ~.
i a U-shaped member 44 which is part of a frame ~5O As noted in FIGURE 3, the frame 45 has an extension 47 :- .
I that carries the geardrive 34 of the e].ectric motor 36, .~ t~e gear unit being actually supported by a platEorm : .
47~ FIGURE 2 sh~ws that the member 21 is connected to a ~ :
'. parallel link system consisting of three links 48, 50, -and 51. Links 48 and 50 run parallel to each other and ' :'- ' ~ ~ .
....
- ~ ~ . . . . . . . . . . .
connect member 21. to a counterweight 52 at the bottom, .:-while the link 51 connects member 20 to the counterweight 52 at the top. Between links 48, 50 and 51 is another electric motor 53 which drives, by way oE a worm year (.not shown), a screw jack 55, which upon operation presses -' against a wear plate at the underside por-tion of the . link 51 to raise in parallel fashion the member 21 relative to the rolls. (This wear plate is not shown in FIGURES
~ 1, 2, and 3.) At this point, it will be appreciated ;;, 10 that since all three links are pivotally connected at one end to the frame 45 of the member 21 by insertion of pins 57 and 59, and, in turn, they are pivotally -:
! connected at the other end to the counterweight 52 by ~:.
~ insertion of pins 61 and 63, that as these links are :
I displaced angularly by the operation of the screw jack , .
55, -the mer~er 21 as well as the member 20 maintains a horizontal. position during vertical movementO
'I To the right. of the members 20 and 21, as ~ :.
l one views FIGURES 1, 2, .and 3, but best illustrated in ..
FIGURE 2, and still with reference to the construction I of the car 10, rests the counterweight 52 located in the ~.
I plane between the two back wheels 16~ The total weicJht ~:~1 , ~. .
of a paix of work rolls of the type illustrated in these ..
FIGURES 1, 2, and 3 may be in a typical four high, hot or cold, rolling mill of the.order of 40,000 lbs. During . :~
the lowering and/or raising of the rolls 26 and members 20 and 21, their total weight.is partially off~set by the weight of the counterweight whi.ch is 5 to 10% greater :.;
than the set of roll assemblies. The electric motors 19, ~l 30 36, and 53 are controlled from a control box 65 located to the right of the counterwéight and supported by the car, as viewed in FIGURE 1.
In operation, and in referring to removing the worm rolls from -the mill, the car 10 is brought to a position adjacent the mill window, by a rack and pinion arrangement 18. In this position, the need, if any, or exact adju~tment for alignment with the centers oE
the worn rolls can be determined and made~ AEter this, the ends of the rolls 26 are received in the openings 22 and 23 of the members 20 and 21, respectively, by further operation of the rack and pinion arranyernent 18, and depending on the nature of the four high roll arrange-ment,the top work roll may be moved vertically to permit raising of -the lower work roll off or its back-up roll, or both rolls ~ay be moved together in each case by operating the motor 53. In many cases, it may not be ~
necessary to lower the upper work roll ree of the upper I ~ -back-up roll since a spaced relationship may have been previously assumed in preparation for the work roll changing.
Once cantilsverly supported by the car 10, the rolls 26 can be retracted to a position where they can be lowered by the car onto one of the two platforms 28 in a side-shifter device. IE the bearing chocks ara not ~
nested or interfitted, stools will be inserted between -;
tha rolls, be~ore -the car releases the rolls in order ¦ to keep the top roll assembly from falling. It should be noted that the vertical dimsnsions of tha stools are ;
such that the rolls are maintained on fixed centers ~or I both the minimum and maximum roll sizes. After this, the car 10 is further retracted to disengage the rolls and allows the platform carrying tha old work rolls to move out from in front of the mill and the platform carrying the new stooled work rolls to rnove in front of ~` -the mill and in front of the cac 10. This will place ~" ,, .
. :
:. ' " ~''''.
: the new set of work rolls in position to be engaged and raised o:E~ the platform by the members 21 and 20 of the car 10, Even i:E the work rolls diE:Eer in the location of their axes to the work roll9 just removed rom the mill, there is no need to adjust the members 20 , and 21 since, as noted, this is taken care o~ by the . El~ed center stools. .
Once the rolls are raised off o:E the plat:Eorrn.. ~ .
: by operating the motor 53, the stools can be removed and ~
the platform moved to the side of the mill opposite to the side that the platform carrying the worn work roll~ .
was moved and the car 10 carrying the new work roll set in .. ~.. -a cantilever :Eashion is advanced to a position adjacent . ~ :
, the mill window.
1 While in this raised position, the new rolls can -l again be adjusted either simultaneously while maintaining .. ~.
:~. an equal distance between themselves and/or the me~ber ;:~ 20 can be independently adjusted so that the new rolls . :~
., will be properly aligned wi-th respect to the driving .: ::
couplings of the mill for automatic insertion of the rolls :~
~ into the couplings~ A~ter this takes place, the lower :~
¦ roll 26 can be lowered -to its proper operating position .
i~ on top of the lower back-up roll by again opera-ting the i, motor 53.
~1 , ., ~ .. .
`i ~7- : -~ . , .
: ' ,'. :
., , ~ .
.. . .. .. . .
use -that remove and replace the rolls in pairs.
Porter bars and C-hooks require ths services of a ! mill crane which is not only very time consuming and ~ .
~, . .: .
prevents the crane from being used Eor other necessary :
purposes, but makes accurate guiding and positive handling of the roll or rolls impossible. This results in not only ~ :.
substantial delay in properly positioning the rolls in the .-mill and aligning the rolls with the couplings o~ the :.:
~, drivi.ng spindles, but permits the rolls to ~e banged about .~ -.. Z resulting in damage to the mill parts and to the rolls themselves including the back-up rollsO In order to remove the rolls from the mill they are required to be : :
, lifted from the lower back-up rolls in a very limited :~.
;~ space and when replaced they have to be lowered onto the ' lower back-up rollO In the past, during this operation ..
i very frequently the upper back-up roll was forcefuily hit !'.,~ '`: .
;i ~ by the upper work roll and the lower back-up roll with .. .
i the lower work roll resulting, in many cases, in damage :~
to the rolls~ .. : :
~I Notwithstanding the disadvantages of employing ~ :
C-hooks or porter bars to change the work rolls hereto- .~ -fore, until very recently this was the only course open .~
.. .. . .
~ to the industry other than the very expensive, fully ...
.~1 automatic arrangements, such as turntables and side- .
~k : ~', .--., " , , 7~
shifters, used with push or pull work roll extractors. ~ :
In addition to the very large initial capital eY~pense when attempts were made to adapt them to existiny mills, the automakic arrangements re~uirPd substantial alteration to the mill, Eor example, a redesigniny of the windows and bearing chocks to acco~modate the extractors and the ~; inclusion of roll supporting rails. More recently, a roll changing device has been proposed i.n which the roll supporti.ng and carryiny element ha~ two fixed roll receiving 10 portions and which necessi.tate the use o~ rep].aceable stools mounted between the chocks of the rolls when the j rolls are in the mill~
The present invention provides a device for changing one or more rolls of a rolliny mill which will . ~.
~ not require the services of a crane or alterations to I the mill itself and which will permit accurate, positive, .1 and relatively rapid removal and replacement of -the roll, thereby reducing the likelihood of possible damage to ~ the adjacent parts or to the roll~
:` 20 The present inventi.on provides a guided roll carrying car located on the operator's side of the mill -. .
I for removing and replacing a pair of rolls of the mill . : ;`
.. by engaging the ends of the rolls, the car including ~: .
:-` means for cantileverly supporting the rolls always . I , .
parallel to one another which means can be readily and ~¦ accurately adjusted for displacement either saparately `.
.. ,. . - ~
relative to one another or in unison to align with ~ :
~` varying roll centers, thereby e].iminating the stooling operation in the milla ~ ~:
In the present invention the car is provided . .
j with a counterweight to offset the weight o~` the rolls :~ ¦ as the rolls are adjusted for displacement and moved . ' ' ~ :
-~: -2-:~ :
~4~2 lnto and out of the Mill~ ;
Certain embodiments are described, reference being made to the accompanying drawings, wherein: :-FIGURE 1 i5 an elevational view, partly broken away, of a roll carrying car constructed in accordance with the present invention arranged on the operator's side of a rolling mill showing the car in one of its operative positions; :
FIGURE 2 is an enlarged plan view of the car shown in FIGURE l; and FIGURE 3 is an enlarged view of the central portion of FXGURE 2. ~:
In referring first to FIGURE 1, there is shown a worX roll changing car 10 being supported on a pair of spaced parallel rails 12 arranged on the operator's side -I of a rolling mill, not shown, and which sxtends from a ¦ position remote from the window.of the mill to a position adjacent thereto. The car engages the rails 12 by two .
pairs of wheels 14 and 16 and is driven by a rack and ~: :
pinion arrangement 18, which, in turn, is driven by a gear drive-electric motor assembly 19. While the other important elements of the car 10 will be described later .
in connection with FIGURES 2 and 3, sufficient at this :~
¦` point is to call attention to the roll carrying members 20 i ;~
and 21 mounted on the front of the car lOt each having ..
: an opening 22 and 23, respectively, for receiving the .. ¦
;:~ adjacent end 24 and 25 of two work rolls 26 of a rolling ~ i ~ mill for cantileverly supporting the rolls as a se-t : ~ during exchange of the rolls to and from the millO To ~ 30 the left of the car 10, as one view FIGURE 1, only a . ;:
. ::, ::"
small portion of the set of rolls 26 supported by a ~:
. :
platform 28 o~ a side-shifting device is shown, since i` . ~3~ ~ -~r~)4~
such devices are familiar to the art; an example o which is the ~ide-shiEter consisting oE two roll set supporting platforms which are moved to either side of the mill window during the roll changing operation as illustrated in U. S. Patent Mo~ 3,779,061 - C. S. Shumacher - dated December 18, 1973.
Returning now to complete the description o:E
the car 10, as more fully illustrated in FIGURES 2 and 3, and more particularly in FIGURE 3, in order to be able ~: 10 to rapidly but accurately adjust the roll carrying member 20 of the car 10, there is provided a screw 30 and nut 32 The nut 32 is securely mounted against rotation in the member 20 and the screw 30 is driven in and through both . the member 20 and nut 32 by a worm gear unit 34 connected ~:
;~ to an electric motor 36. As the screw 30 rotatesl it .
presses against a wear p].ate 38, loca-ted underneath the :
~ screw 30 and mounted on the top 40 oE the member 21. This ,~ pressing of the screw 30 against the wear plate 38 forces .
the member 20 to be raised a controllable distance corre- .
l 20 sponding to a desired center of an upper roll.
.l In order to assure that the member 20 will be I held against any tendency to rotate in the horizontal :
~, plane but still free to move vertically the member 20 `~ is provided with two opposed wings 41, shown only in .~
FIGURE 2, received in complimentary slots 43 -ormed in - ~.
i a U-shaped member 44 which is part of a frame ~5O As noted in FIGURE 3, the frame 45 has an extension 47 :- .
I that carries the geardrive 34 of the e].ectric motor 36, .~ t~e gear unit being actually supported by a platEorm : .
47~ FIGURE 2 sh~ws that the member 21 is connected to a ~ :
'. parallel link system consisting of three links 48, 50, -and 51. Links 48 and 50 run parallel to each other and ' :'- ' ~ ~ .
....
- ~ ~ . . . . . . . . . . .
connect member 21. to a counterweight 52 at the bottom, .:-while the link 51 connects member 20 to the counterweight 52 at the top. Between links 48, 50 and 51 is another electric motor 53 which drives, by way oE a worm year (.not shown), a screw jack 55, which upon operation presses -' against a wear plate at the underside por-tion of the . link 51 to raise in parallel fashion the member 21 relative to the rolls. (This wear plate is not shown in FIGURES
~ 1, 2, and 3.) At this point, it will be appreciated ;;, 10 that since all three links are pivotally connected at one end to the frame 45 of the member 21 by insertion of pins 57 and 59, and, in turn, they are pivotally -:
! connected at the other end to the counterweight 52 by ~:.
~ insertion of pins 61 and 63, that as these links are :
I displaced angularly by the operation of the screw jack , .
55, -the mer~er 21 as well as the member 20 maintains a horizontal. position during vertical movementO
'I To the right. of the members 20 and 21, as ~ :.
l one views FIGURES 1, 2, .and 3, but best illustrated in ..
FIGURE 2, and still with reference to the construction I of the car 10, rests the counterweight 52 located in the ~.
I plane between the two back wheels 16~ The total weicJht ~:~1 , ~. .
of a paix of work rolls of the type illustrated in these ..
FIGURES 1, 2, and 3 may be in a typical four high, hot or cold, rolling mill of the.order of 40,000 lbs. During . :~
the lowering and/or raising of the rolls 26 and members 20 and 21, their total weight.is partially off~set by the weight of the counterweight whi.ch is 5 to 10% greater :.;
than the set of roll assemblies. The electric motors 19, ~l 30 36, and 53 are controlled from a control box 65 located to the right of the counterwéight and supported by the car, as viewed in FIGURE 1.
In operation, and in referring to removing the worm rolls from -the mill, the car 10 is brought to a position adjacent the mill window, by a rack and pinion arrangement 18. In this position, the need, if any, or exact adju~tment for alignment with the centers oE
the worn rolls can be determined and made~ AEter this, the ends of the rolls 26 are received in the openings 22 and 23 of the members 20 and 21, respectively, by further operation of the rack and pinion arranyernent 18, and depending on the nature of the four high roll arrange-ment,the top work roll may be moved vertically to permit raising of -the lower work roll off or its back-up roll, or both rolls ~ay be moved together in each case by operating the motor 53. In many cases, it may not be ~
necessary to lower the upper work roll ree of the upper I ~ -back-up roll since a spaced relationship may have been previously assumed in preparation for the work roll changing.
Once cantilsverly supported by the car 10, the rolls 26 can be retracted to a position where they can be lowered by the car onto one of the two platforms 28 in a side-shifter device. IE the bearing chocks ara not ~
nested or interfitted, stools will be inserted between -;
tha rolls, be~ore -the car releases the rolls in order ¦ to keep the top roll assembly from falling. It should be noted that the vertical dimsnsions of tha stools are ;
such that the rolls are maintained on fixed centers ~or I both the minimum and maximum roll sizes. After this, the car 10 is further retracted to disengage the rolls and allows the platform carrying tha old work rolls to move out from in front of the mill and the platform carrying the new stooled work rolls to rnove in front of ~` -the mill and in front of the cac 10. This will place ~" ,, .
. :
:. ' " ~''''.
: the new set of work rolls in position to be engaged and raised o:E~ the platform by the members 21 and 20 of the car 10, Even i:E the work rolls diE:Eer in the location of their axes to the work roll9 just removed rom the mill, there is no need to adjust the members 20 , and 21 since, as noted, this is taken care o~ by the . El~ed center stools. .
Once the rolls are raised off o:E the plat:Eorrn.. ~ .
: by operating the motor 53, the stools can be removed and ~
the platform moved to the side of the mill opposite to the side that the platform carrying the worn work roll~ .
was moved and the car 10 carrying the new work roll set in .. ~.. -a cantilever :Eashion is advanced to a position adjacent . ~ :
, the mill window.
1 While in this raised position, the new rolls can -l again be adjusted either simultaneously while maintaining .. ~.
:~. an equal distance between themselves and/or the me~ber ;:~ 20 can be independently adjusted so that the new rolls . :~
., will be properly aligned wi-th respect to the driving .: ::
couplings of the mill for automatic insertion of the rolls :~
~ into the couplings~ A~ter this takes place, the lower :~
¦ roll 26 can be lowered -to its proper operating position .
i~ on top of the lower back-up roll by again opera-ting the i, motor 53.
~1 , ., ~ .. .
`i ~7- : -~ . , .
: ' ,'. :
., , ~ .
.. . .. .. . .
Claims (7)
1. An apparatus for removing and replacing rolls to and from a rolling mill ox the like comprising:
a car arranged on the operator's side of the said mill, said car including a counterweight at one end arranged to offset at least a part of the weight of one or more of said rolls when supported by said car, two members carried by the other end of said car having portions for receiving and supporting in a cantileverly fashion a different one of said rolls in a position parallel to their working positions when said rolls are in said mill, means for displacing one of said members parallel and relative to other member in a direction coincident to a plane containing the axes of said rolls, means for displacing said two members in unison in said direction, and means for horizontally moving said car to and from said rolling mill.
a car arranged on the operator's side of the said mill, said car including a counterweight at one end arranged to offset at least a part of the weight of one or more of said rolls when supported by said car, two members carried by the other end of said car having portions for receiving and supporting in a cantileverly fashion a different one of said rolls in a position parallel to their working positions when said rolls are in said mill, means for displacing one of said members parallel and relative to other member in a direction coincident to a plane containing the axes of said rolls, means for displacing said two members in unison in said direction, and means for horizontally moving said car to and from said rolling mill.
2. An apparatus according to claim 1, wherein said counterweight is mounted on said car.
3. An apparatus according to claim 1, wherein said two members are so constructed and arranged that said one member moves in a guided manner relative to the other member in said direction.
4. An apparatus according to claim 1, wherein said means for displacing said one member comprises a screw, and means for connecting said screw to said one member for causing movement thereof.
5. An apparatus according to claim 1, including means for supporting said members comprising a system of parallel links so constructed and arranged so as to cause a raising and lowering of said members in a manner that said members are mounted in said parallel position, and means for effecting said raising and lowering.
6. An apparatus according to claim 5, wherein means for displacing said two members in unison includes a screw jack means, said screw jack means mounted to engage one of the links of said parallel link system.
7. An apparatus according to claim 1, wherein said means for moving said car includes a rack and pinion arrangement.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US549129A US3926027A (en) | 1975-02-11 | 1975-02-11 | Roll changing apparatus for a rolling mill or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1044172A true CA1044172A (en) | 1978-12-12 |
Family
ID=24191788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA244,913A Expired CA1044172A (en) | 1975-02-11 | 1976-02-03 | Roll changing apparatus for a rolling mill or the like |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3926027A (en) |
| JP (1) | JPS51145450A (en) |
| BR (1) | BR7600795A (en) |
| CA (1) | CA1044172A (en) |
| DE (1) | DE2604375A1 (en) |
| ES (1) | ES445086A1 (en) |
| FR (1) | FR2300629A1 (en) |
| GB (1) | GB1529926A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074558A (en) * | 1977-02-17 | 1978-02-21 | Gulf & Western Manufacturing Company | Roll changing apparatus |
| JPS5594710A (en) * | 1979-01-08 | 1980-07-18 | Hitachi Ltd | Rearranging apparatus for roll |
| DE3019059C2 (en) * | 1980-05-19 | 1985-05-02 | Maschinen- Und Werkzeugbau Gmbh, 4600 Dortmund | Device for changing the work rolls of rolling stands |
| DE502005007522D1 (en) * | 2005-10-14 | 2009-07-30 | Bhs Corr Masch & Anlagenbau | Apparatus for producing corrugated cardboard |
| US10696003B2 (en) * | 2014-12-04 | 2020-06-30 | Bobst Mex Sa | Tool-holder head, transport carriage and methods for mounting and removing a tool for a unit for converting a flat substrate |
| CN114505348A (en) * | 2022-03-10 | 2022-05-17 | 中冶陕压重工设备有限公司 | Roll changing device for rollers in box |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3323345A (en) * | 1951-01-28 | 1967-06-06 | Blaw Knox Co | Roll changing apparatus |
| US3866455A (en) * | 1973-12-28 | 1975-02-18 | Mesta Machine Co | Mill roll changing system including a roll buggy |
| US3905485A (en) * | 1974-03-27 | 1975-09-16 | Wean United Inc | Roll changing device for a rolling mill and the like |
| JPS5334793A (en) * | 1976-09-08 | 1978-03-31 | Toyama Chem Co Ltd | Novel penicillin oxides and cephalosporin oxides |
-
1975
- 1975-02-11 US US549129A patent/US3926027A/en not_active Expired - Lifetime
-
1976
- 1976-01-20 GB GB2139/76A patent/GB1529926A/en not_active Expired
- 1976-02-03 CA CA244,913A patent/CA1044172A/en not_active Expired
- 1976-02-05 DE DE19762604375 patent/DE2604375A1/en active Pending
- 1976-02-09 BR BR7600795A patent/BR7600795A/en unknown
- 1976-02-11 ES ES445086A patent/ES445086A1/en not_active Expired
- 1976-02-11 FR FR7603771A patent/FR2300629A1/en active Granted
- 1976-02-12 JP JP51014352A patent/JPS51145450A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| ES445086A1 (en) | 1977-05-16 |
| BR7600795A (en) | 1976-08-31 |
| FR2300629B1 (en) | 1979-06-29 |
| JPS565602B2 (en) | 1981-02-05 |
| JPS51145450A (en) | 1976-12-14 |
| US3926027A (en) | 1975-12-16 |
| FR2300629A1 (en) | 1976-09-10 |
| GB1529926A (en) | 1978-10-25 |
| DE2604375A1 (en) | 1976-08-19 |
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