JP4118681B2 - Roll rearrangement equipment and roll rearrangement method - Google Patents

Description

  The present invention relates to a roll changing equipment and a roll changing method of a 6-high rolling mill, and in particular, a roll changing equipment and a roll changing of a 6-high rolling mill when the 4-high rolling mill is modified to a 6-high rolling mill. Regarding the method.

  When performing roll recombination in a rolling mill, it is common to use a roll recombination device that pulls out the roll in the roll axial direction by wheels or the like. That is, the roll rearrangement device incorporates wheels into roll chocks at both ends of the roll, and allows the wheels to be pulled out and stored on the operation side along the rearrangement guide rail provided on the side of the roll housing.

  In such a roll changing device, a so-called side shift method is generally used. In general, since the backup rolls are rarely recombined, recombination means different from the work roll and intermediate roll recombination apparatuses are provided. In this specification, the roll changing device means a roll changing device excluding a backup roll.

  The roll changing device of a six-high rolling mill is generally composed of a traveling carriage, a push puller and a side shifter provided on the traveling carriage. The traveling carriage is an apparatus for traveling the roll changing device in the roll axis direction. As the driving means, hydraulic pressure may be used or an electric motor may be used. The push puller is used to pull the used roll group to be recombined from the rolling mill body onto the side shifter on the operation side in the roll axis direction, and to push the roll group before use into the rolling mill body from the side shifter. Device. Further, the side shifter shifts the used roll group pulled out by the push puller in the direction perpendicular to the roll rearrangement direction. The used roll group pulled out thereby moves from the recombination position, and instead, the pre-use roll group arranged in advance on the side shifter moves to the recombination position.

  As a procedure of recombination, first, the traveling carriage (roll recombination device) stands by at the retracted position. After stopping the rolling, each roll is adjusted in position in the vertical direction and the axial direction in preparation for recombination. Thereafter, the traveling carriage is driven to cause the roll changing device to travel to the forward position. After traveling to the forward position, the push puller is driven from the reverse position to the forward position. Push the hook of the push puller to the hook at the tip of the operation side chock of the upper and lower work rolls and / or the upper and lower intermediate rolls, and then retract the push puller to the retracted position, thereby moving the upper and lower work rolls and / or the upper and lower intermediate rolls to the roll axis Pull it out to the operation side. The used roll group that has been pulled out is exchanged with the roll group before use by the side shifter. After that, the roll group before use is once again incorporated into the rolling mill body by a push puller, and the hook connected to the roll group before use is removed. Then, the push puller is retracted to the retracted position, and the traveling carriage is further retracted to the retracted position, thereby completing the roll reassignment work.

  Such a side shift type roll changing device is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 11-192594 and 6-7810.

JP 11-192594 A JP-A-6-7810

  By the way, an old-type rolling mill may be remodeled to a new-type rolling mill. It costs less than setting up a new rolling plant. At this time, the four-stage rolling mill may be modified to a six-stage rolling mill. The roll changing device of the four-stage rolling mill changes the work roll, and the roll changing device of the six-high rolling mill changes the work roll and the intermediate roll. Therefore, the height of the floor surface on which the traveling carriage of the roll changing device of the four-stage rolling mill travels and the height of the floor surface on which the traveling carriage of the roll changing device of the six-stage rolling mill travels are approximately the difference between the lower intermediate rolls. There is. On the other hand, when remodeling from a four-stage rolling mill to a six-stage rolling mill, the height of the rolling pass line cannot be changed in order to maintain consistency with the front and rear facilities.

  Therefore, if a side shift type roll rearrangement device for a conventional six-stage rolling mill according to the prior art is used when remodeling from a four-stage rolling mill to a six-stage rolling mill, the traveling carriage of the roll rearrangement device The floor on which the car runs must be dug down by about the lower middle roll.

  Normally, in a continuous rolling mill, the roll changing device must carry the roll to a roll shop building arranged in parallel with the rolling line building, and a truck or a person is in front of the rolling mill operation side. The floor must be flat so that there is no step.

  For these reasons, it is practically difficult to convert the 4-high rolling mill to the 6-high rolling mill. Therefore, there is a demand for a roll rearrangement device that hardly needs to dig up the floor height on which the traveling carriage of the roll rearrangement device before remodeling travels.

  An object of the present invention is to provide a roll recombination facility and a roll that do not need to dig up almost the floor height on which the traveling carriage of the roll rearrangement apparatus before remodeling travels when remodeling from a four-high mill to a six-high mill. It is to provide a rearrangement method.

In order to achieve the above object, the features of the present invention and the attendant features are as follows.
(1) In order to achieve the above object, the present invention provides a first traveling carriage, a push puller device, and a first puller in a roll changing facility of a six-stage rolling mill having upper and lower work rolls, upper and lower intermediate rolls, and upper and lower backup rolls. A side shift device, removably connecting a roll rearrangement device that rearranges the used upper and lower work rolls and the upper intermediate roll, and an operation side chock of the first traveling carriage and the lower intermediate roll; Provided separately from the first side shift device and the first connecting means that allows the used lower intermediate roll to be pulled out from the rolling mill by the first traveling carriage and to push the lower intermediate roll before use into the rolling mill. The used lower intermediate roll drawn from the rolling mill by the first traveling carriage before the operation side of the rolling mill and the first running A second side shift device for exchanging the lower intermediate roll before use, which is pushed into the rolling mill by a cart, and the second side shift device is used before and after the operation side of the rolling mill. It is assumed that it has elevating means that makes it possible to replace the lower intermediate roll .

  Thus, the upper and lower work rolls and the upper intermediate roll are provided with a roll rearrangement device having a traveling carriage, a push puller device, and a first side shift device, similarly to the roll rearrangement device of the conventional six-stage rolling mill, For the intermediate roll, by using the traveling carriage of the above roll changing device, connecting the used and intermediate lower intermediate roll to the traveling carriage, pulling out from the rolling mill, and pushing into the rolling mill When remodeling to a 6-high rolling mill, the floor height can remain the same as that of a 4-high rolling mill, and the rolls can be changed for both the upper and lower work rolls and the upper and lower intermediate rolls. This makes it possible to modify the roll rearrangement device to a six-stage rolling mill without changing the height of the running floor before the modification, and without digging down the front side of the rolling mill. Can.

A second side for exchanging the used lower intermediate roll drawn from the rolling mill by the first traveling carriage before the operation side of the rolling mill and the used lower intermediate roll pushed into the rolling mill by the first traveling carriage. Ri by the the provision of the shifting device can be easily replaced under intermediate rolls prior to use and spent with second side shift device.

Further, Ri by the the provision of the lifting means to the second side shift device, less projecting to the floor above the the rolls when replacing the lower intermediate rolls prior to use and during standby and spent under intermediate rolls before use Can be eliminated completely, and the work on the floor becomes easy.

( 2 ) Moreover, in order to achieve the said objective, this invention is a roll rearrangement equipment of the six-stage rolling mill which has an up-and-down work roll, an up-and-down intermediate roll, and an up-and-down backup roll. A roll rearrangement device having a first side shift device for reassembling used and unused upper and lower work rolls and an upper intermediate roll, and an operation side chock of the first traveling carriage and the lower intermediate roll are detachably connected. A first connecting means that allows a used lower intermediate roll to be pulled out of the rolling mill by the first traveling carriage, and allows the lower intermediate roll before use to be pushed into the rolling mill; and the first side shift device, Separately provided, the used lower intermediate roll and the front pulled out from the rolling mill by the first traveling carriage before the operation side of the rolling mill And a second side shift device for exchanging a lower intermediate roll before the use to be pushed into the rolling mill by a first traveling carriage, said second side shift device, the floor surface on which the first traveling carriage travels also intended to have a lifting means making it possible to replace the lower intermediate rolls before use and the spent at the bottom.

Even by this, without changing the previous modifications traveling floor level of the roll recombinant device, also without digging the previous rolling mill operation side most, it is possible to modify the 6-stage rolling mill. In addition, it is possible to easily replace the used and lower intermediate rolls before use by using the second side shift device, and to replace the lower intermediate roll before use and before use when waiting for the lower intermediate roll before use. Occasionally, these rolls can be prevented from protruding upward on the floor surface, and the workability on the floor surface is improved.

( 3 ) Furthermore, in order to achieve the above-mentioned object, the present invention provides a first traveling carriage, a push puller device, and a roll rearrangement facility for a six-stage rolling mill having an upper and lower work roll, an upper and lower intermediate roll, and an upper and lower backup roll. A roll rearrangement device having a first side shift device for reassembling used and unused upper and lower work rolls and an upper intermediate roll, and an operation side chock of the first traveling carriage and the lower intermediate roll are detachably connected. A first connecting means that allows a used lower intermediate roll to be pulled out of the rolling mill by the first traveling carriage, and allows the lower intermediate roll before use to be pushed into the rolling mill; and the first side shift device, Separately provided, the used lower intermediate roll and the front pulled out from the rolling mill by the first traveling carriage before the operation side of the rolling mill And a second side shift device for exchanging a lower intermediate roll before the use to be pushed into the rolling mill by a first traveling carriage, said second side shift device, under intermediate rolls before use and the spent Two pallets to be placed respectively, and one of the two pallets, a first position corresponding to the height of the lower intermediate roll built in the rolling mill, and a lower side than the floor surface on which the first traveling carriage travels A first drive means that moves up and down to the second position, and when the two pallets are in the second position, the two pallets are side-shifted to replace the used and lower intermediate rolls before use. It shall have a second driving means for performing.

Even by this, without changing the previous modifications traveling floor level of the roll recombinant device, also without digging the previous rolling mill operation side most, it is possible to modify the 6-stage rolling mill. In addition, the lower intermediate roll that has been used and before use can be easily exchanged using the second side shift device, and the used and unused lower rolls below the floor on which the first traveling carriage travels. The intermediate roll can be exchanged.

( 4 ) In the above ( 1 ) to ( 3 ), the roll reassignment facility of the present invention is preferably a space below the floor surface on which the first traveling carriage travels before the operation side of the rolling mill. And further comprising third drive means for pulling out the used lower backup roll from the rolling mill and pushing the lower backup roll before use into the rolling mill, wherein the second side shift device is a rearrangement of the lower backup roll. It is installed using the space for performing.

  Thereby, both the 2nd side shift device for a lower middle roll rearrangement, and the 3rd drive means for a lower backup roll rearrangement can be arrange | positioned in the limited space before the operation side of a rolling mill.

( 5 ) In the above ( 4 ), preferably, the second traveling carriage that enables the second side shift device to move in the roll axis direction, and the second traveling carriage and the third driving means are coupled, A second connection that makes it possible to secure the space for rearrangement of the lower backup roll by moving the second traveling carriage together with the lower backup roll by the third driving means when the lower backup roll is rearranged. Means.

  Thereby, even when the second side shift device is on the travel path of the lower backup roll when the lower backup roll is recombined, the lower backup roll and the second side shift device are moved simultaneously by driving the third drive means, The lower backup roll can be rearranged.

(8) Moreover, in order to achieve the said objective, this invention is a roll rearrangement method of the 6-stage rolling mill which has an up-and-down work roll, an up-and-down intermediate roll, and an up-and-down backup roll. On the other hand, a roll rearrangement device provided with a traveling carriage, a push puller device and a first side shift device is provided, and the roll rearrangement device is used to rearrange the used upper and lower work rolls and the upper intermediate roll using the roll rearrangement device. By connecting the running cart of the used lower intermediate roll to the operation side chock of the used lower intermediate roll and pulling it out from the rolling mill, and then connecting the operating side chock of the lower intermediate roll before use to the running cart and pushing it into the rolling mill. reclassified under intermediate rolls before use and the spent, and the first side shifting device separately in the lower A second side shift device for the roll is provided, and after the used lower intermediate roll is pulled out from the rolling mill, the used and intermediate lower intermediate rolls are exchanged using the second side shift device, and then The operation side chock of the lower intermediate roll before use is pushed into the rolling mill, and the used lower intermediate roll before and after use is replaced before and after the replacement of the used intermediate roll before and after use by the second side shift device. These are exchanged below the floor on which the traveling carriage travels .

As a result, as described in (1) above, the traveling floor surface height of the roll changing device is not changed to that before the remodeling, and the front of the rolling mill operation side is hardly dug down, and the 6-stage rolling mill is remodeled. be able to. The second side shifting device using it is possible to replace the lower intermediate rolls prior to use and the used lower intermediate rolls, the lower intermediate rolls prior to use and during standby and spent under intermediate rolls before use When the rolls are replaced, the protrusions of the rolls above the floor surface can be completely eliminated, and the work on the floor surface becomes easy.

  According to the present invention, when remodeling from a four-high mill to a six-high mill, it is not necessary to change the floor height on which the roll changing device travels. In addition, the floor surface on the rolling mill operation side is flat, and trucks and people can pass.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2, reference numeral 100 denotes a six-stage rolling mill modified from a four-stage rolling mill, and includes upper and lower work rolls 11 and 12, upper and lower intermediate rolls 13 and 14, and upper and lower backup rolls 15 and 16. . The rolling pass line height X of the six-high rolling mill 100 is the same as the rolling pass line height of the four-high rolling mill before remodeling. The roll rearrangement equipment according to this embodiment is used for such a six-stage rolling mill 100, and this roll rearrangement equipment includes the roll rearrangement device 1 for the upper and lower work rolls 11 and 12 and the upper middle roll 13 and the lower middle roll. 14 side shifters 5 are provided.

  The roll changing device 1 for the upper and lower work rolls 11 and 12 and the upper intermediate roll 13 includes a traveling carriage 2 and a push puller 3 provided on the traveling carriage 2 in the same manner as the conventional roll changing apparatus of a six-stage rolling mill. And a side shifter 4.

  The traveling carriage 2 has a driving device 21 and traveling wheels 22, and the traveling wheels 22 are driven by the driving device 21. The driving device 21 is an electric type in the illustrated example, but may be a hydraulic type. A traveling rail 23 is laid on the floor surface 101 positioned in front of the operation side of the rolling mill 100, and the traveling wheels 22 travel on the traveling rail 23. The traveling wheel 22 and the traveling rail 23 are shown enlarged in FIG. The traveling rail 23 is laid according to the height of the floor surface 101.

  As described above, the height of the floor surface on which the traveling carriage of the roll changing device of the four-stage rolling mill travels and the height of the floor surface on which the traveling carriage of the roll rearranging device of the conventional six-stage rolling mill runs are approximately lower There is a 14 minute difference in rolls. For this reason, when the conventional 6-high rolling mill roll changing device is used for the remodeled 6-high rolling mill 100, the floor on which the traveling carriage travels has to be dug down for approximately 14 minutes on the lower intermediate roll. On the other hand, the height Y of the floor surface 101 on which the traveling carriage 2 of the roll rearrangement apparatus 1 according to the present embodiment travels is the height at which the traveling carriage of the roll rearrangement apparatus of the four-stage rolling mill before the modification travels. Is almost the same.

  The push puller 3 draws the used upper and lower work rolls 11 and 12 and the upper intermediate roll 13 from the rolling mill 100 onto the side shifter 4 and pushes the upper and lower work rolls and the upper intermediate roll before use into the rolling mill 100. It is a device. The side shifter 4 is a device for exchanging the used upper and lower work rolls 11 and 12 and the upper intermediate roll 13 with the upper and lower work rolls and the upper intermediate roll before use.

  The push puller 3 includes a driving device 31 and can travel on the traveling carriage 2 in the roll axis direction. In the present embodiment, the driving device 31 drives the sprocket 32 and travels by meshing the sprocket 32 with the chain 33 a disposed on the vertical frame of the traveling carriage 2 and the chain 33 b disposed on the traveling path of the side shifter 4. Is possible. In addition, it may be driven by a motor cylinder or a rack and pinion, and the driving device 31 is an electric type, but may be a hydraulic type.

  The push puller 3 has hooks 112, 122, 132. The hooks 111, 121, 131 are provided on the operation side chocks of the upper and lower work rolls 11, 12 and the upper intermediate roll 13. , 132 are connected to the hooks 111, 121, 131 so that each roll can be pulled out or pushed into the roll axial direction operation side. The hooks 112, 122, 132 of the push puller 3 each have a driving device, and can be opened and closed by a link mechanism, thereby detaching from the chock side hooks 111, 121, 131.

  As shown in FIGS. 4 and 5, the side shifter 4 has a drive device 41 having one end connected to the frame of the traveling carriage 2 and the other end connected to the bottom frame of the side shifter 4. This drive device 41 is a hydraulic cylinder type, and by extending and contracting this drive device 41, the side shifter 4 can be moved on the traveling rail 42 provided on the traveling carriage 2 in the vertical direction in FIG. . The drive device 41 can employ various methods other than the hydraulic type. FIG. 6 shows an enlarged view of the engaging portion between the side shifter 4 and the traveling rail 42. A slide member 43 is provided at the bottom of the side shifter 4, and the slide member 43 is slidably fitted to the traveling rail 42.

  Further, as shown in FIGS. 4 and 5, the side shifter 4 is configured so as to form two rows of roll arrangement locations arranged in parallel on the side frames 4a, 4b and the intermediate frame 4c on both sides, and the respective roll arrangement locations. The upper work roll 11, the lower work roll 12, and the upper intermediate roll 13 have guide rails 44, 45, and 46 that can travel, and two sets of the roll groups can be stacked in parallel. The upper and lower work rolls 11 and 12 and / or the upper intermediate roll 13 drawn out by the push puller 3 are arranged on one side of two side-by-side roll arrangement positions of the side shifter 4 as shown in FIGS. On the other side, polished rolls 11 ′, 12 ′, and 13 ′ before use are disposed. Thereafter, the side shifter 4 is shifted by the driving device 41 so that the rolls 11 ′, 12 ′, and 13 ′ before use are arranged on the traveling track of the push puller 3, that is, the roll changing position. By this operation, the used rolls 11, 12, 13 and the pre-use rolls 11 ', 12', 13 'can be quickly replaced.

  1 and 2, a hook 142 is provided at the end of the traveling carriage 2 on the rolling mill 100 side, a hook 141 is provided on the operation side chock of the lower intermediate roll 14, and the hook 142 is connected to the hook 141. Then, by driving the traveling carriage 2, the lower intermediate roll 14 can be pulled out from the main body of the rolling mill 100 to the operation side in the roll axis direction or pushed into the main body of the rolling mill. The hook 142 has a driving device, and can be opened and closed by a link mechanism, whereby the hook 142 is attached to and detached from the chock-side hook 141.

  Here, as shown in FIG. 7, the portion where the lower intermediate roll 14 travels in front of the operation side of the rolling mill 100 includes a connecting floor 143 provided adjacent to the main body of the rolling mill 100 and a side shifter for the lower intermediate roll. 5, and the height of the floor formed by these is substantially the same as the height Y of the floor 101 on which the traveling carriage 2 travels. On the connecting floor 143, a rear rail 145 having the same height as the reassembly guide rail 144 for the lower intermediate roll 14 provided in the rolling mill 100 is laid, and the wheels provided on the operation side chock of the lower intermediate roll 14. Travels on the travel rail 145.

  As shown in FIG. 1, the lower intermediate roll side shifter 5 is disposed below the floor surface 101 on which the traveling carriage 2 in front of the rolling mill 100 on the operation side travels. Details of the lower intermediate roll side shifter 5 will be described with reference to FIGS.

  FIG. 7 is a side view of the lower intermediate roll side shifter 5. The lower intermediate roll side shifter 5 includes a lower intermediate roll side shifter traveling carriage 51, two pallets 52 arranged in parallel above the traveling carriage 51, and lifting devices 53a and 53b for raising and lowering the pallet 52. Have. One lower intermediate roll 14 can be stacked on each pallet 52. That is, since two pallets 52 are arranged in parallel, two lower intermediate rolls 14 can be stacked in parallel.

  The elevating devices 53a and 53b are hydraulic cylinder types, and both the cylinders work together to raise the pallet 52 at the roll installation position (described later) from the rising end where the pallet 52 is lifted to the height Y of the floor surface 101. The lower intermediate roll 14 disposed on the pallet 52 can be driven with a stroke up to a descending end where the upper end is below the floor surface 101.

  Here, the height Y of the floor surface 101 and the installed traveling height of the lower intermediate roll 14 (the height corresponding to the height connecting floor 143 indicated by the imaginary line in FIG. 7, that is, the lower intermediate roll 14 in the rolling mill 100 It is difficult to make the rear guide rails 144) have exactly the same height, and there may be some difference. If the installed traveling height of the lower intermediate roll 14 and the height Y of the floor surface 101 are left different, a step will be generated there. Therefore, the stop position of the pallet 52 is set at the lower end and the lower intermediate roll installed. It is necessary to set the travel height and the height Y of the floor surface 101 at three positions. Therefore, in this embodiment, as shown in FIG. 8, two lifting devices, that is, a lifting device 53a and a lifting device 53b are provided, and the lifting device 53a is used for main lifting and the lifting device 53b is used for fine adjustment. In addition, two pallets 52 are placed on each frame 52a. The cylinder side of the elevating device 53a is fixed to the frame of the traveling carriage 51, and the rod side is fixed to the underframe 52a. Further, the cylinder side of the lifting device 53b is fixed to the frame 52a, and the rod side is brought into contact with and supported by the pallet 52. The rising end of the stroke of the lifting / lowering device 53a when only the lifting / lowering device 53a is extended is set so that the wheel of the intermediate roll 14 is equivalent to the height of incorporation of the intermediate roll 14, and both the lifting / lowering devices 53a and 53b are extended. The rising end of the stroke of the lifting device 53b is set so that the wheel of the intermediate roll 14 corresponds to the height Y of the floor surface 101, and the lowering ends when both the lifting devices 53a and 53b are contracted, The pallet 52 is supported by a pallet support frame 57 (described later), and the rod tip of the lifting / lowering device 53b is set so as to be separated from the pallet 52.

  When the lower intermediate roll 14 is pulled out from the inside of the rolling mill main body through the connecting floor 143 onto the pallet 52 of the lower intermediate roll side shifter 5 or incorporated into the rolling mill main body, when the lifting device 53a is extended, the height of the pallet 52 becomes intermediate. When the lower intermediate roll 14 is pulled to the roll shop direction by the roll changing device traveling carriage 2 when the roll 14 is raised to the built-in height, if the lifting device 53b is further extended, the pallet 52 is raised to the height of the floor surface 101. Ascend to Y. 1 and 10 to 13, for the sake of convenience, the built-in height of the intermediate roll 14 is shown as being equal to the height Y of the floor surface 101. Further, instead of the lifting devices 53a and 53b, one lifting device may be provided and the stop positions may be set at three locations.

  Further, as shown in FIGS. 7 and 9, the lower intermediate roll side shifter 5 includes a driving device 54 and a pallet support frame 57 for shifting the pallet 52 in the rolling direction on the left and right above the frame of the traveling carriage 51. The two pallets 52 are placed on the pallet support frame 57 so as to be orthogonal thereto. Here, two traveling rails 56 are laid on the left and right sides of the upper side of the frame of the traveling carriage 51, and a slide member 58 is provided at the bottom of the pallet support frame 57. The slide member 58 is slidable on the traveling rail 56. Is fitted. As shown in FIGS. 10 to 13, the driving device 54 is a hydraulic cylinder type, the cylinder side is connected to the frame of the traveling carriage 51, and the rod side is connected to each pallet support frame 57. With such a structure, the pallet 52 can move in the rolling direction in addition to the vertical direction, and the drive device 54 shifts the two pallets 52 at the same time, thereby arranging the pallet 52 in the roll installation position and in parallel with it. It is possible to change the position of the pallet 52 to be changed. That is, the position of the lower intermediate roll 14 loaded on the pallet 52 can be exchanged, whereby the used lower intermediate roll 14 and the pre-use lower intermediate roll 14 'can be exchanged.

  As shown in FIGS. 1 and 10 to 13, the position where the lower intermediate roll side shifter 5 is arranged is a groove formed between the two traveling rails 23 on the floor surface 101 in front of the rolling mill 100 on the operation side. 102 spaces. In this space, a drive device 55 for rearranging the lower backup roll 16 when the upper and lower backup rolls 15 and 16 are rearranged is disposed. The driving device 55 is a hydraulic cylinder type, and the rod side tip is connected to the operation side chock of the lower backup roll 16 via a connecting member 59 as shown in FIG. It is possible to pull out the used lower backup roll from the rolling mill body and push the lower backup roll before use into the rolling mill body. The cylinder side of the drive device 55 is arranged away from the rolling mill main body in order to secure a space for pulling out the used lower backup roll 16. The lower intermediate roll side shifter 5 is disposed in the groove portion 102 using the space.

  Further, as a result of arranging the lower intermediate roll side shifter 5 in this way, when the lower backup roll 16 is rearranged, the lower intermediate roll side shifter 5 is positioned on the path along which the lower backup roll 16 travels. It is necessary to travel the lower intermediate roll side shifter 5 in the roll axis direction in accordance with the travel of the backup roll 16. Therefore, as shown in FIG. 7, the traveling carriage 51 of the lower intermediate roll side shifter 5 includes slide members 51 a, 51 b, 51 c at the bottom, and can slide on the foundation 103 in the groove 102. The traveling carriage 51 is connected to the connecting member 59 and is connected to the driving device 55 through the connecting member 59. When the lower backup roll is rearranged, the traveling carriage 51 is moved together with the lower backup roll 103 by the driving device 55. Can be moved to. That is, the drive device 55 serves both as a backup roll rearrangement and a lower intermediate roll side shifter travel. Note that separate drive devices may be used. The driving device may be an electric type.

  Next, the roll reassignment procedure will be described. In the following description, it is assumed that the built-in height of the intermediate roll 14 is equal to the height Y of the floor surface 101.

  First, the operation of the rolling mill 100 is stopped, and the push-up by a pressurizing cylinder (not shown) provided below the roll is released. Thereby, each roll of the upper and lower work rolls and the upper and lower intermediate rolls is lowered by its own weight, and the wheels provided in each roll chock are placed on a guide rail or guide rail 144 (not shown).

  After each roll is in a recombination standby state, the roll rearrangement device 1 is driven to the position close to the rolling mill 100 in FIG. In this state, the traveling carriage 2 and the floor surface 101 are fixed with pins or the like so that the roll changing device 1 itself does not move. Thereafter, the push puller 3 is advanced. When only the work rolls are rearranged, the hooks 111 and 121 provided on the operation side chock of the upper and lower work rolls 11 and 12 are connected to the hooks 112 and 122 of the push puller 3. When reassembling only the work roll and the intermediate roll or only the intermediate roll, the hook 131 provided on the operation side chock of the upper intermediate roll and the hook 132 of the push puller 3 are connected. After being connected by the hook, the roll group to be rearranged is pulled out to the roll axial direction operation side by driving the push puller 3. The pulled roll group stops at a position where it is placed on the side shifter 4.

  Subsequent operations are two types of operations in the case of recombination of only work rolls and in the case of recombination of work rolls and intermediate rolls or only intermediate rolls.

  In the case of recombination only of the work rolls, the upper and lower work rolls 11 and 12 pulled out onto the side shifter 4 are disconnected from the push puller 3. On the side shifter 4, work rolls 11 ′ and 12 ′ before use are arranged in parallel with the used work rolls 11 and 12 drawn out. Thereafter, the side shifter 4 is shifted from the state of FIG. 4 to the state of FIG. 4 and 5, the used upper intermediate roll 13 and the pre-use upper intermediate roll 13 'are mounted on the side shifter 4, but in the case of recombination of only the work roll, the intermediate roll 13' The roll is not placed on the side shifter 4. By shifting the side shifter 4, the used upper and lower work rolls 11 and 12 move laterally from the installation position, and the pre-use upper and lower work rolls 11 ′ and 12 ′ move to the installation position. Thereafter, the hooks 111 and 121 of the upper and lower work roll operating side chocks before use and the hooks 112 and 122 of the push puller 3 are connected, the push puller 3 is driven, and the upper and lower work rolls 11 ′ and 12 ′ before use are centered on the roll. Incorporate into the rolling mill body by pushing to the direction drive side. After the roll is incorporated into the rolling mill body, the upper and lower work rolls 11 ′, 12 ′ and the push puller 3 are disconnected and the push puller 3 is moved backward. Then, the fixing of the floor surface 101 and the traveling carriage 2 is released, the traveling carriage 2 is retracted to the standby position, and the roll reassignment is completed.

  Next, when reassembling only the work roll and the intermediate roll or the intermediate roll, the push puller 3 pulls out the upper and lower work rolls 11 and 12 and the upper intermediate roll 13 or only the upper intermediate roll 13 onto the side shifter 4 and mounts them. Put. In the meantime, the hook 141 provided on the operation side chock of the lower intermediate roll 14 and the hook 142 provided on the rolling mill side tip of the traveling carriage 2 are connected. After the upper and lower work rolls 11 and 12 and the upper intermediate roll 13 or only the upper intermediate roll 13 are placed on the side shifter 4, the fixing of the traveling carriage 2 and the floor surface 101 is released, and the traveling carriage 2 is driven, The roll changing device 1 is moved backward. By retracting the roll changing device 1, the lower intermediate roll 14 connected to the traveling carriage 2 passes through the connecting floor 143 and is pulled out to the roll axial direction operation side. The pulled out lower intermediate roll 14 stops at a position where it is placed on the pallet 52 of the lower intermediate roll side shifter 5. Note that the pallet 52 is raised to a height at which the height of the pallet 52 and the installation height of the lower intermediate roll 14 (the height Y of the floor 101) coincide with each other by the lifting device 53a.

  A method for replacing the used lower intermediate roll 14 and the pre-use lower intermediate roll 14 ′ will be described with reference to FIGS. 10 to 13.

  10-13, the center is a roll incorporation position among three roll positions. When the lower intermediate roll 14 is pulled out, it is in the state shown in FIG. Here, the hook 141 provided on the operation side chock of the lower intermediate roll 14 and the hook 142 provided on the rolling mill side tip of the traveling carriage 2 are disconnected. Of the two pallets 52 arranged in parallel, the pallet at the roll incorporation position is in the raised position, and the used lower intermediate roll 14 is placed thereon. Further, a lower intermediate roll 14 'before use is placed on the other pallet.

  First, the pallet 52 on which the used lower intermediate roll 14 is placed is lowered by the lifting device 53a. At this time, the two pallets 52 are placed on the pallet support frame 57 and their heights coincide (FIG. 12). Next, the pallet support frame 57 is driven by the driving device 54 to shift the two pallets 52 and 52 and shift the roll position. As a result, the pallet 52 on which the used lower intermediate roll 14 is placed moves sideways from the assembly position, and the pallet 52 on which the pre-use lower intermediate roll 14 'is placed moves to the assembly position (FIG. 11). Next, the lifting / lowering device 53a raises the pallet 52 on which the lower intermediate roll 14 ′ before use at the roll installation position is placed, and the height of the pallet 52 and the installation height of the lower intermediate roll (the height Y of the floor 101). ) Are matched (FIG. 13). Thereafter, the hook 141 provided on the operation side chock of the lower intermediate roll 14 ′ before use and the hook 142 provided on the rolling mill side tip of the traveling carriage 2 are connected. The above is the procedure for replacing the lower intermediate roll.

  While the old and new lower intermediate rolls are being replaced, the pre-use roll and the used roll are also replaced in the side shifter 4 on the retracted roll rearrangement device 1. On the side shifter 4, used upper and lower work rolls 11 and 12 and an upper intermediate roll 13, or only the upper intermediate roll 13 (hereinafter referred to as a used roll group) are placed, and in parallel therewith, the upper and lower work pieces before use. Only the rolls 11 ′ and 12 ′ and the upper intermediate roll 13 ′ or the upper intermediate roll 13 ′ (hereinafter referred to as a pre-use roll group) are placed. By disconnecting the used roll group from the push puller 3 and then shifting the side shifter 4, the used roll group is moved laterally from the installation position, and the pre-use roll group is moved to the installation position (from FIG. 4). To FIG. 5). And the hook provided in the roll group operation side chock before use and the hook provided in the push puller 3 are connected.

  As described above, after the old and new roll exchange using the side shifter 4 and the old and new roll exchange using the lower intermediate roll side shifter 5 are finished, the traveling carriage 2 is driven to advance the roll changing device 1. Let By moving the roll changing device 1 forward, the pre-use lower intermediate roll 14 ′ connected to the traveling carriage 2 is pushed toward the roll axial direction driving side and is incorporated into the rolling mill main body through the connecting floor 143. When the roll changing device 1 reaches the forward end, the lower intermediate roll 14 'before use is completely assembled into the rolling mill body. After the lower intermediate roll 14 ′ is assembled before use, the lower intermediate roll 14 ′ and the traveling carriage 2 are disconnected, and the traveling carriage 2 and the floor surface 101 are fixed using fixing means such as a pin. To do. Thereafter, the push puller 3 is moved forward so that the pre-use roll group travels to the roll axial direction drive side and is incorporated into the rolling mill body. After incorporating the pre-use roll group into the rolling mill body, the pre-use roll group and the push puller 3 are disconnected, and the push puller 3 is moved backward. Then, the traveling carriage 2 and the floor surface 101 are released from being fixed, and the traveling carriage 2 is driven to move the roll rearrangement device 1 backward, thereby completing the roll rearrangement.

  When the lower backup roll is rearranged, the used lower backup roll 16 is pulled out from the rolling mill 100 using the driving device 55. At this time, the lower intermediate roll side shifter 5 is on the travel path of the lower backup roll 16, but as described above, the drive device 55 serves both as a backup roll rearrangement and as a lower intermediate roll side shifter travel. By driving the drive device 55, the lower backup roll 16 and the lower intermediate roll side shifter 5 move simultaneously. By providing a mechanism for disconnecting the operation side chock of the lower backup roll 16 from the drive device 55, the lower intermediate roll side shifter 5 may be moved independently.

  As described above, in the present embodiment, the traveling carriage 2, the push puller 3, and the side of the upper and lower work rolls 11 and 12 and the upper intermediate roll 13 are the same as in the conventional roll changing device of the six-stage rolling mill. A roll rearrangement device 1 having a shifter 4 is provided. For the lower intermediate roll 14, a traveling carriage 2 of the roll rearrangement device 1 is used, and used lower and intermediate rolls are connected to the traveling carriage 2. Since the drawing out from the rolling mill 100 and the pushing into the rolling mill 100 are performed, when the floor height Y remains unchanged from that of the four-stage rolling mill, All of the rolls 11 and 12 and the upper intermediate roll 13 and the lower intermediate roll 14 can be recombined, so that the traveling floor height Y of the roll reassignment apparatus 1 can be changed without changing it. Also without digging the previous rolling mill operation side most, it is possible to modify the 6-stage rolling mill. Further, the floor surface 101 on the rolling mill operation side is flat, and a truck or a person can pass.

  Separately from the side shifter 4, the used lower intermediate roll drawn from the rolling mill by the traveling carriage 3 and the lower intermediate roll before use pushed into the rolling mill by the traveling carriage 2 are exchanged before the operation side of the rolling mill. Since the lower intermediate roll side shifter 5 is provided, the used lower intermediate roll 14 before use can be easily exchanged.

  Further, the lower intermediate roll side shifter 5 is provided with a lifting / lowering device 53a, so that it is possible to replace the used and unused lower intermediate rolls below the floor surface 101 on which the traveling carriage 2 travels. When the front lower intermediate roll is waiting and when the used lower intermediate roll is replaced, the rolls can be prevented from protruding upward from the floor surface 101, and workability on the floor surface 101 can be improved.

  Further, the used lower backup roll 16 is pulled out from the rolling mill 100 in a space below the floor surface 101 on which the traveling carriage 2 travels before the operation side of the rolling mill 100, and the lower backup roll before use is rolled. Since the driving device 55 to be pushed into the machine 100 is arranged and the lower intermediate roll side shifter 5 is installed using a space for rearranging the lower backup roll 16, the limited space before the operation side of the rolling mill Both the lower intermediate roll side shifter 5 and the lower backup roll rearrangement driving device 55 can be arranged.

FIG. 1 is a side view of a roll reassignment facility according to an embodiment of the present invention. FIG. 2 is a plan view of a roll changing device for upper and lower work rolls and an upper intermediate roll in the roll changing equipment shown in FIG. FIG. 3 is an enlarged view of wheels and traveling rails of the traveling carriage of the roll changing device shown in FIG. FIG. 4 is a diagram showing a roll replacement procedure by a side shifter of the roll changing device shown in FIG. 5 is a diagram showing a roll replacement procedure after the procedure shown in FIG. 4 by the side shifter of the roll changing device shown in FIG. 6 is a diagram showing details of a traveling rail portion of the side shifter of the roll changing device shown in FIG. 2, and is an enlarged view of a VI part in FIG. FIG. 7 is a side view of the side shifter for the lower intermediate roll in the roll reassignment facility shown in FIG. 1. FIG. 8 is a diagram showing details of the pallet lifting mechanism of the lower intermediate roll side shifter shown in FIG. 7. FIG. 9 is a diagram showing details of the pallet travel rail portion of the lower intermediate roll side shifter shown in FIG. 7, and is an enlarged view of a portion XI in FIG. FIG. 10 is a diagram showing a roll replacement procedure by the lower intermediate roll side shifter shown in FIG. FIG. 11 is a diagram showing a roll replacement procedure after the procedure shown in FIG. 10 by the lower intermediate roll side shifter shown in FIG. 7. FIG. 12 is a diagram showing a roll replacement procedure after the procedure shown in FIG. 11 by the lower intermediate roll side shifter shown in FIG. 7. FIG. 13 is a diagram showing a roll replacement procedure after the procedure shown in FIG. 12 by the lower intermediate roll side shifter shown in FIG. 7.

Claims (6)

In the roll changing equipment of the six-high rolling mill (100) having the upper and lower work rolls (11, 12), the upper and lower intermediate rolls (13, 14) and the upper and lower backup rolls (15, 16),
The first traveling carriage (2), the push puller device (3) and the first side shift device (4) are provided, and the used upper and lower work rolls (11, 12) and the upper intermediate roll (13) are rearranged. A roll changing device (1);
The first traveling carriage and the operation side chock of the lower intermediate roll (14) are detachably connected, the used lower intermediate roll is pulled out from the rolling mill by the first traveling carriage, and the lower intermediate roll before use is A first connecting means (141, 142) that enables to be pushed into the rolling mill ;
The used lower intermediate roll and the first traveling provided separately from the first side shift device (3) and pulled out from the rolling mill by the first traveling carriage (2) before the operation side of the rolling mill. A second side shift device (5) for exchanging the lower intermediate roll before use, which is pushed into the rolling mill by a carriage,
The second side shift device (5) has lifting and lowering means (53a) capable of exchanging the used and lower intermediate rolls before use before the operation side of the rolling mill. Rolling equipment for stage rolling mills. In the roll changing equipment of the six-high rolling mill (100) having the upper and lower work rolls (11, 12), the upper and lower intermediate rolls (13, 14) and the upper and lower backup rolls (15, 16),
The first traveling carriage (2), the push puller device (3) and the first side shift device (4) are provided, and the used upper and lower work rolls (11, 12) and the upper intermediate roll (13) are rearranged. A roll changing device (1);
The first traveling carriage and the operation side chock of the lower intermediate roll (14) are detachably connected, the used lower intermediate roll is pulled out from the rolling mill by the first traveling carriage, and the lower intermediate roll before use is A first connecting means (141, 142) that enables to be pushed into the rolling mill;
The used lower intermediate roll and the first traveling provided separately from the first side shift device (3) and pulled out from the rolling mill by the first traveling carriage (2) before the operation side of the rolling mill. A second side shift device (5) for exchanging the lower intermediate roll before use, which is pushed into the rolling mill by a carriage,
The second side shift device (5) makes it possible to exchange the used and unused lower intermediate rolls below the floor (101) on which the first traveling carriage (2) travels. A roll recombination facility for a six-stage rolling mill, characterized by having lifting means (53a). In the roll changing equipment of the six-high rolling mill (100) having the upper and lower work rolls (11, 12), the upper and lower intermediate rolls (13, 14) and the upper and lower backup rolls (15, 16),
The first traveling carriage (2), the push puller device (3) and the first side shift device (4) are provided, and the used upper and lower work rolls (11, 12) and the upper intermediate roll (13) are rearranged. A roll changing device (1);
The first traveling carriage and the operation side chock of the lower intermediate roll (14) are detachably connected, the used lower intermediate roll is pulled out from the rolling mill by the first traveling carriage, and the lower intermediate roll before use is A first connecting means (141, 142) that enables to be pushed into the rolling mill;
The used lower intermediate roll and the first traveling provided separately from the first side shift device (3) and pulled out from the rolling mill by the first traveling carriage (2) before the operation side of the rolling mill. A second side shift device (5) for exchanging the lower intermediate roll before use, which is pushed into the rolling mill by a carriage,
The second side shift device (5) includes two pallets (52, 52) for placing the used and lower intermediate rolls before use, and one of the two pallets as the rolling mill. A first drive means (53a) that moves up and down to a first position corresponding to the height of the lower intermediate roll built-in relative to the second floor and a second position below the floor surface on which the first traveling carriage travels, and the two pallets, A six-stage system comprising second driving means (54) for side-shifting the two pallets when in the second position and exchanging the used and lower intermediate rolls before use. Roll recombination equipment for rolling mills. In the roll rearrangement equipment of the 6-high rolling mill according to any one of claims 1 to 3 ,
It is arranged in a space below the floor surface (101) on which the first traveling carriage (2) travels in front of the operation side of the rolling mill, and the used lower backup roll is pulled out from the rolling mill, before use. Third drive means (55) for pushing the lower backup roll into the rolling mill is further provided, and the second side shift device (5) is installed using a space for rearranging the lower backup roll. The roll recombination equipment of the 6-high mill characterized by this. In the roll changing equipment of the 6-high rolling mill according to claim 4 ,
A second traveling carriage (51) capable of moving the second side shift device (5) in the roll axis direction, and the second traveling carriage and the third driving means (55) are connected, and the lower backup is performed. The second connecting means (59) that makes it possible to secure the space for rearrangement of the lower backup roll by moving the second traveling carriage together with the lower backup roll by the third driving means at the time of roll rearrangement. And a roll recombination facility for a six-stage rolling mill. In the roll changing method of the six-high rolling mill (100) having the upper and lower work rolls (11, 12), the upper and lower intermediate rolls (13, 14) and the upper and lower backup rolls (15, 16),
A roll rearrangement device (1) having a traveling carriage (2), a push puller device (3) and a first side shift device (4) is provided for the upper and lower work rolls and the upper intermediate roll, and this roll rearrangement device is used. Recombining used and pre-use upper and lower work rolls and upper intermediate rolls,
The rolling carriage of the roll rearrangement device is connected to the operation side chock of the used lower intermediate roll and pulled out from the rolling mill, and then the operation side chock of the lower intermediate roll before use is connected to the traveling carriage and inside the rolling mill. to rearrange the lower intermediate roll prior to use and the spent by pushing in,
In addition to the first side shift device (4), a second side shift device (5) for the lower intermediate roll (14) is provided, and after the used lower intermediate roll is pulled out from the rolling mill, Replacing the used and lower intermediate roll before use using a two-side shift device, and then pushing the operation side chock of the lower intermediate roll before use into the rolling mill,
Before and after replacement of the used and unused lower intermediate roll by the second side shift device (5), the used and unused lower intermediate roll is raised and lowered, and the traveling carriage (2) exchanges them. A roll recombination method for a six-high mill, which is performed below the traveling floor (101) .

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