JP3162637B2 - Roll changing equipment for rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll changing device for a rolling mill, and more particularly, to a roll changing device suitable for use in a continuous rolling mill during threading.

[0002]

2. Description of the Related Art FIG. 4 is a front view showing a conventional roll changing device of a general rolling mill. The roll changing device includes a first lower rail 6 which is disposed inside the rolling mill 1 and which is supported below the plate path 10 in parallel with the roll axis and both ends thereof can be raised and lowered by lifting means 20 such as cylinders. A second lower rail 7 mounted on a roll carriage 8 on the operation side outside the rolling mill 1 and connectable to the first lower rail 6; a drive chock (lower chock) 4 for the drive side and operation side of the lower work roll 2; The upper end can be protruded above the lower chock 4 and can be raised and lowered within a predetermined movable range.
A lifting spacer 100 having a lower wheel 90 which engages with the second lower rails 6 to 7; and a lifting spacer 100 attached to the chock (upper chock) 5 on the driving side and the operating side of the upper work roll 3.
And a spacer receiver 110 engaged with the upper end of the spacer.

In FIG. 4, reference numerals 23 and 22 denote upper and lower couplings which are disposed on the drive side and are fitted to the roll neck ends of the upper and lower work rolls 3 and 2 on the drive side to transmit torque.
53 and 52 are upper and lower reinforcing rolls, and 55 and 54 are upper and lower reinforcing roll chocks. Needless to say, the arrangement position of the first lower rail 6 and the dimensions, the predetermined movable range, and the attachment position of the lifting / lowering spacer 100 are determined by connecting the upper and lower work rolls 3 and 2 to the upper and lower couplings 23 and 22. Designed to properly align and engage.

At the time of rolling, the first lower rail 6 is lowered from the lower limit position of the lower wheel 90, the lower wheel 90 is locked to the lower chock 4 at this position, and the lifting spacer 100 is "down".
In this state, the upper end is separated from the spacer receiver 110.
When removing old work rolls from the rolling mill 1 during roll change, the rotation of the upper and lower couplings 23 and 22 is stopped, the upper work rolls 3 and 2 are removed, and the upper reinforcing roll 53 is removed.
Is lifted up from the upper work roll 3, and the first lower rail 6 is lifted by the cylinder 20 to engage with the lower wheel 90, and the lower wheel 90 is pushed up to the upper limit position. At this time,
When the lifting spacer 100 is in the "elevated" state, the lower work roll 2 is moved by the lower wheel 90 using the first lower rail 6 as a footing, and the upper work roll 3 is moved through the spacer receiver 110 of the upper chock 5 to the lower wheel 90. The upper and lower work rolls 3, 2 are simultaneously supported by the upper ends of the elevating spacers 100, which are used as a scaffold, so that they can move on the first lower rail 6 as an integrated roll set.

[0005] Then, the roll cart 8 is moved to connect the second lower rail 7 to the first lower rail 6, and the roll set is pulled rightward in the figure by an actuator (not shown), whereby the lower wheel 90 is moved. Rolls roll on the first and second lower rails 6 and 7, and the roll set moves onto the roll carriage 8. In addition,
FIG. 4 shows a state during the movement. When the movement is completed, the extraction is completed. The extracted roll set is moved to another place by a crane or the like.

To load a new work roll into the rolling mill 1, the procedure is reversed. As described above, the roll changing device of the conventional rolling mill has a relatively simple configuration and is suitable for automation, and is suitable for crane handling because there are no members surrounding the work roll. Meanwhile, for example, continuous rolling mills such as a tandem rolling mill having a plurality of stands have recently been in a trend of being operated in an operation mode in which strip coils are connected one after another on the entry side to perform continuous rolling from the viewpoint of high productivity. . Therefore, it is required to roll-stop each of the plurality of stands in the threading sequence in order, and to perform a roll change to the stand where the rolling is stopped.

However, in the above-mentioned conventional roll changing device, the lower chock 4 and the upper chock 5 on the driving side cross the plate path 10 in a state of being connected by the elevating spacer 100 as shown in FIG. The lifting spacer 100 on the side intersects the board path 10 on which the board is actually running, so that it cannot be applied to the roll change during the passing. Therefore, many dedicated devices have been developed and put into practical use in order to enable roll change during sheet passing. Since there is no problem because the lower work roll passes under the board road, all of these dedicated devices are related to a mechanism that allows the upper work roll to be separated from the lower work roll and supported when crossing the board road. It is as follows. Wheels are also provided on the upper chock, and upper rails (for supporting upper work rolls) as tracks for the wheels are provided so as to be interconnected at predetermined height positions inside and outside the rolling mill, respectively, and for raising and lowering the upper rails in the rolling mill. (See Japanese Patent Application Laid-Open No. 50-28465). In the same manner as above, the upper rail is provided on the chock of the upper reinforcing roll, and the upper chock on the operation side of the work roll is nested with the lower chock on the same side, and both upper and lower rails engage with the upper chock on the operation side, respectively. (See Japanese Patent Publication No. 51-2306). Without the above upper rail inside and outside the rolling mill,
An apparatus in which the upper and lower rolls are connected by a connecting means on the operation side so that the upper roll is cantilevered, and the upper chock on the drive side is lifted only when crossing the board path (see Japanese Patent Application Laid-Open No. 58-86915).

[0008]

According to the above-mentioned devices, it is possible to temporarily change the rolls at the time of threading. However, the above-described apparatus requires a separate cylinder for raising and lowering the upper rail to be separately installed inside the rolling mill main body, and furthermore, the upper rail must also be provided outside the rolling mill main body by forming a frame on the lower rail. It becomes complicated, and equipment costs increase when installing a new mill, and when adding the function of the equipment to an existing rolling mill, there is a problem that the remodeling range is too large and the remodeling cost increases, and the work rolls are also surrounded. There is also a problem that the workability of crane handling is impaired because the number of members increases.

Further, the apparatus does not require a separate cylinder for raising and lowering the upper rail in the rolling mill as in the case where the upper rail is entrusted to the upper reinforcing roll chock, but the upper rail is provided outside the rolling mill. The conditions that must be met are the same as for the device, and the upper chock on the operating side must be provided with wheels that engage not only the upper rail but also the lower rail. There are great restrictions on the surface. Further, since the upper chock and the lower chock on the operation side are nested, there is a problem that the workability of crane handling is further deteriorated.

Further, the cantilever type device is a measure only when crossing the board road, but because of the cantilever, an excessively unbalanced load is destined to the roll neck on the operation side of the upper work roll, which is a fulcrum. For this reason, there is a concern that there is a problem such as a deviation of the roll axis and a shortening of the life of the roll. In addition, after the roll is replaced, the connecting means must be operated to release the cantilever connection of the upper and lower work rolls. -It is difficult to use practically from the viewpoint of safety, and it is not possible to automate using a pneumatic cylinder, etc., but equipment such as the pneumatic cylinder is required separately. Extra work such as attaching and detaching an air hose is required, and there is a problem in workability.

[0011] Several other proposals have been made, all of which have any of the problems mentioned above. In view of the above-mentioned problems of the prior art, the present invention is advantageous in terms of cost and installation space for new installation or remodeling, does not exert excessive force on the upper roll neck, and improves the workability of crane handling. It is an object of the present invention to provide a roll changing device for a rolling mill that does not hinder and that is suitable for automation and that can be used at the time of threading.

[0012]

According to the present invention, there is provided a first lower rail which is disposed inside a rolling mill, and which is parallel to a roll shaft below a sheet path and both ends of which are supported so as to be liftable by lifting means, A second lower rail mounted on the roll bogie on the operation side outside the rolling mill and connectable to the first lower rail; a third lower rail mounted on the roll bogie and parallel to the second lower rail; The upper rail is disposed inside and is supported by the upper reinforcing roll chock on the drive side and the operation side at both ends in parallel with the roll axis above the plate path, and the upper end is attached to the chock on the operation side of the lower work roll. A first spacer having a first lower wheel protruding upward from the chock and engaging with the first and second lower rails at a lower end; and a first and a second attached to the chock on the driving side of the lower work roll. A second lower wheel engaged with the lower rail and a drive side of the lower work roll A second spacer having a third lower wheel attached to the chock and having an upper end protruding above the chock and having a lower end engaged with the third lower rail; and a first spacer attached to the chock on the operating side of the upper work roll. A first spacer receiver engaged with an upper end of the upper work roll, an upper wheel attached to a drive side chock of the upper work roll and engaged with the upper rail, and a second spacer attached to a drive side chock of the upper work roll. A second spacer receiver engaged with the upper end of the spacer,
A rolling mill characterized in that the upper wheel can be engaged with the upper rail and the third lower wheel can be simultaneously engaged with the third lower rail, respectively, under the connection of the first and second lower rails. This is a roll assembling device.

It is preferable that the third lower rail has a rail surface having a downward slope approaching the rolling mill at an end facing the rolling mill.

[0014]

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a front view showing a state in which upper and lower work rolls are on a roll carriage, and FIG. And FIG.
FIG. 2 is a front view of a state in which upper and lower work rolls partially enter the inside of the rolling mill in FIG. 1. 1 and 2, reference numeral 4 denotes a chock (lower chock) of the lower work roll 2, and 5 denotes an upper work roll 3.
In the chock (upper chock), suffixes A and B represent the operating side and the driving side, 12 is a third lower rail, 13 is an upper rail, 14 is an upper rail extension, 91, 92, and 93 are first and second rails. The second and third lower wheels, 94 is an upper wheel, 101 and 102 are first and second spacers (elevating and lowering spacers in this example), and 111 and 112 are first and second spacers.
This is the spacer receiver. Note that the same or corresponding portions as those in the conventional example of FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.

The roll changing apparatus according to the present invention is a rolling mill 1
A first lower rail 6 which is disposed inside and is parallel to the roll axis below the sheet path 10 and both ends of which are supported so as to be able to move up and down by elevating means such as a cylinder 20, for example; A second lower rail 7 mounted on the roll trolley 8 and connectable to the first lower rail 6; and a lower chock 4A on the operation side, which is attached to the lower chock 4A so as to be movable up and down within a predetermined movable range, and whose upper end can protrude above the lower chock 4A. A first lower wheel 91 (corresponding to the lower wheel 90 in FIG. 4) having a lower end engaged with the first and second lower rails 6 to 7 at the lower end.
Lifting spacer 101 (equivalent to lifting spacer 100 in FIG. 4)
And a first spacer receiver 111 (FIG. 4) attached to the upper chock 5A of the operation side and engaged with the upper end of the first lifting / lowering spacer 101.
(Corresponding to the lifting spacer receiver 110).

That is, the support mechanism of the upper and lower chocks 5A and 4A on the operation side that does not cross the plate path 10 follows the conventional example shown in FIG. But the lower chock on the drive side
Regarding 4B, the support by the lower wheel 90 forming the lower end of the lifting spacer 100 of FIG.
The first and second lower rails 6 and 7 are supported on the lower chock 4B by attaching a second lower wheel 92 which is not connected to the lifting spacer 100.

The support mechanism of the upper chock 5B on the driving side crossing the plate path 10 is provided inside the rolling mill 1 in accordance with the conventional apparatus in order to avoid cantilever as in the conventional apparatus. The upper rail 13 supported by the upper reinforcing roll chock 55 on the drive side and the operation side, respectively, is engaged with the upper rail 13 attached to the upper chock 5B on the drive side. A wheel 94 is provided, so that the upper wheel 94 is engaged with the upper rail 13.

However, in the conventional apparatus, an upper wheel is also attached to the upper chock 5A on the operation side, and an upper exclusive rail as a supporting scaffold for the upper work roll 3 on the roll carriage 8 is separately mounted on the roll carriage 8. Equipment becomes larger
As described above, there is a problem in terms of economy, space, and crane handling workability. In contrast,
In addition to the above configuration, the present invention further includes a third lower rail 12 mounted on the roll carriage 8 and parallel to the second lower rail 7, and a lower chock 4 </ b> B on the driving side which is vertically movable within a predetermined movable range and has an upper end. A second lifting / lowering spacer 102 having a third lower wheel 93 that can project above the lower chock 4B and engages with the third lower rail 12 at the lower end; and a second lifting / lowering attached to the upper chock 5B on the driving side. Second spacer receiver 11 engaging with the upper end of spacer 102
And the upper wheel 94 and the third lower wheel 93 can be simultaneously engaged with the upper rail 13 and the third lower rail 12, respectively, under the connection of the first and second lower rails 6, 7. With such a configuration, it is possible to avoid interference with the board road 10 without causing the above problem.

That is, when the drive side upper chock 5B passes through the inside of the rolling mill 1, as shown in FIG.
At this time, the second lifting spacer 102 is moved to the “down” position because there is no third lower rail 12 that engages the third lower wheel 93 at the lower end. Yes,
Since the upper end is separated from the second spacer receiver 112 and is below the board path 10, it does not intersect with the board path 10.

Then, for example, as shown in FIG.
By providing an upper rail extension 14 extending the operation wheel 13 to the operation side, the upper wheel 94 can be connected under the connection of the first and second lower rails 6 and 7.
Is on the upper rail 13 and the third lower wheel 93 is on the third lower rail 12
At this time, the upper chock 5B is supported by the upper wheel 94 engaged with the upper rail extension 14 and simultaneously engaged with the third lower rail 12. With the third wheel 93 as a lower end, the upper end of the second elevating and lowering spacer 102 switched from “down” to “ascending” is supported via a second spacer receiver 112. Note that, in a state where the wafer is further moved to the right from the position shown in FIG.
Is supported by a second lifting spacer 102 solely on the third lower rail 12.

As described above, the role as a supporting scaffold for the upper chock 5B on the driving side can be alternately played by the upper rail 13 in the rolling mill 1 and the third lower rail 12 on the roll carriage 8. With this configuration, there is no need to arrange a large frame that surrounds a roll set (a set of upper and lower work rolls 3 and 2) on the roll carriage 8 and dispose the upper rail, and the above problem is solved. Further, as can be seen from FIG. 1, the present invention is suitable for automation because it does not include a complicated mechanism and has a simple configuration.

It is to be noted that the upper wheel 94 can be engaged with the upper rail 13 and the third lower wheel 93 can be simultaneously engaged with the third lower rail 12 under the connection of the first and second lower rails 6, 7. If there is a space around the lower reinforcing roll chock 54 on the operation side of the rolling mill 1, instead of extending the upper rail 13 to the operation side as in the example of FIG. Machine 1
It may be extended to the side.

In particular, when the state as shown in FIG. 1 in which the upper rail extension portion 14 is always protruding interferes with other operations, as shown in FIG. 3 as another embodiment of the present invention. Alternatively, the upper rail extension 14 may be provided on the roll carriage 8 side so as to be connectable to the upper rail 13. In FIG. 3, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

By the way, in the process of loading the roll set into the rolling mill 1 from the roll carriage 8, the third lower wheel 93 passes through the end of the third lower rail 12, loses its support, and falls freely. The second elevating spacer 102 switches from "elevating" to "falling". At this time, there is no particular problem. On the contrary, in the process of pulling out the roll set from the rolling mill 1 to the roll carriage 8, the third lower wheel 93 reaches the end of the third lower rail 12 and rides on the third lower rail 12. 2 lifting spacer 102 is "down"
To “ascending”. At this time, if the end is steep, there is a concern that it may interfere with riding.

Therefore, the third lower rail 12 is not
As shown in (1), it is preferable that the rail surface at the end facing the rolling mill 1 is processed so as to have a downward slope in a direction approaching the rolling mill 1. Thus, the riding operation at the time of pulling out the roll set can smoothly proceed. If the third lower wheel 93 can be engaged with the third lower rail 12 and the upper wheel 94 can be engaged with the upper rail extension 14 at the same time, the second spacer 102 may be the lifting spacer by the above-described riding method. The invention is not limited thereto, and various mechanisms such as an elevating / lowering spacer using a cam system or a raising / lowering spacer using a rotating arm can be employed.

[0026]

As described in detail above, according to the present invention,
It is advantageous in terms of cost and installation space when installing or remodeling, does not apply excessive force to the upper roll neck, and does not hinder crane handling workability,
In addition, there is an excellent effect that a roll changing device for a rolling mill suitable for automation, which is compatible with the passing operation, is realized.

[Brief description of the drawings]

FIGS. 1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a front view of a state in which upper and lower work rolls are on a roll carriage, and FIG.

FIG. 2 is a front view showing a state in which upper and lower work rolls partially enter the inside of the rolling mill in FIG.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a front view of a conventional roll changing device of a general rolling mill.

[Explanation of symbols]

1 Roller 2 Work roll (lower work roll) 3 Work roll (upper work roll) 4,4A, 4B Chock (Lower chock; A is operation side, B is drive side) 5,5A, 5B Chock (Upper chock; A 6 is the operating side, B is the driving side. 6 1st lower rail 7 2nd lower rail 8 Roll trolley 10 Plate path 12 3rd lower rail 13 Upper rail 14 Upper rail extension 20 Lifting means (cylinder) 22 Coupling (Lower coupling) 23 Coupling (upper coupling) 52 Reinforcement roll (lower reinforcement roll) 53 Reinforcement roll (upper reinforcement roll) 54 Reinforcement roll chock (lower reinforcement roll chock) 55 Reinforcement roll chock (upper reinforcement roll chock) 90 Lower wheel 91 1 lower wheel 92 second lower wheel 93 third lower wheel 94 upper wheel 100 lifting spacer 101 first spacer (elevating spacer) 102 second spacer (elevating spacer) 110 space Receiving receiving 111 a first spacer receiving 112 the second spacer

Continuation of the front page (56) References JP-A-6-226314 (JP, A) JP-A-61-206509 (JP, A) JP-A-4-172116 (JP, A) JP-A-58-86915 (JP, A) JP-A-50-155171 (JP, A) JP-A-50-28465 (JP, A) JP-A-47-30560 (JP, A) JP-B-18-18162 (JP, B2) (58) Field surveyed (Int.Cl. ⁷ , DB name) B21B 31/10

Claims (2)

(57) [Claims] 1. A first lower rail disposed inside a rolling mill and supported by a lifting means at both ends in parallel with a roll axis below a plate path and a roll on an operation side outside the rolling mill. A second lower rail mounted on the trolley and connectable to the first lower rail; a third lower rail mounted on the roll trolley and parallel to the second lower rail; The upper rail is attached to the upper rail supported by the upper reinforcing roll chock on the drive side and the operation side, and the upper end can be protruded above the chock and parallel to the roll axis at the upper end. A first spacer having a first lower wheel engaged with the first and second lower rails, and a second spacer attached to the drive-side chock of the lower work roll and engaged with the first and second lower rails. Is attached to the lower wheel and the chock on the drive side of the lower work roll. A second spacer having a third lower wheel projecting upward from the chock and engaging a third lower rail at a lower end; and a second spacer attached to the chock on the operation side of the upper work roll and engaged with an upper end of the first spacer. A first spacer receiver, an upper wheel attached to the drive-side chock of the upper work roll and engaging with the upper rail, and an upper end of the second spacer attached to the drive-side chock of the upper work roll and engaged with the upper rail And a second spacer receiver that connects the first and second lower rails, wherein the upper wheel is on the upper rail and the third lower wheel is on the third
Characterized in that they can be simultaneously engaged with the lower rails respectively. 2. The roll changing apparatus for a rolling mill according to claim 1, wherein the third lower rail has a rail surface having a downward slope approaching the rolling mill at an end facing the rolling mill.