Patent Application
20250091108
The present application claims priority from Japanese application JP2023-149972, filed on Sep. 15, 2023, the content of which is hereby incorporated by reference into this application.
The present invention relates to a roll rearrangement device and a roll rearrangement method in a cluster-type rolling mill.
FR-3122108-A1 describes a robotic system that is for a rolling facility for a metal strip and is suitable for performing operations involving replacement of rolling mill rolls by removing used rolls from a mill stand and depositing them on a laterally arranged rack, and/or inserting new or reconditioned rolls into the mill stand from rolls arranged in the rack.
In a cluster-type rolling mill, for example, as many as 20 rolls, as a set of upper and lower rolls, are housed in a space in a housing. Thus, in roll rearrangement (in the present specification, drawing and attaching of rolls from and to the rolling mill are collectively referred to as “rearrangement”), the rolls need to be rearranged in a limited space because the roll interval is short. In addition, risk is involved in rearrangement work of, in particular, heavy rolls such as second intermediate rolls and backup rolls.
Thus, for example, FR-3122108-A1 describes a robot that holds an end part (cylinder) of a roll to rearrange the roll.
However, in the technique of the above-described related art, a roll is supported on only a single side. That is, what is called a cantilever structure is made. Therefore, the amount of deflection of the roll is large, and work of horizontal insertion and extraction of rolls in the roll length direction becomes unstable, and close checking work increases. Accordingly, there is room for improvement in terms of safe rearrangement.
Moreover, particularly in rearrangement to a new roll, there is a case in which the roll is deflected and it is difficult to accurately fit the roll to a member that supports the roll on the housing side. In this case, there is a possibility that mill vibration occurs.
The present invention provides a roll rearrangement device and a roll rearrangement method that can improve the safety of rearrangement work as compared with conventional ones by realizing parallel insertion and extraction of rolls during roll rearrangement.
The present invention includes a plurality of means for solving the above-described problem. To cite one example thereof, a roll rearrangement device includes a carriage capable of travelling in an axial direction of a roll provided in a rolling mill, a support beam that is provided so as to be movable with travelling of the carriage and taken in and out of the rolling mill, and two roll holding sections that are provided with an interval in the axial direction of the support beam and are capable of attaching and detaching the roll.
According to the present invention, the safety of rearrangement work can be improved as compared with conventional ones by realizing parallel insertion and extraction of the roll during roll rearrangement. Problems, configurations, and effects other than the above-described ones will be made apparent by the following description of embodiments.
Embodiments of a roll rearrangement device, a roll rearrangement method, and a tile according to the present invention will be described with use of
First, the overall configuration of a multi-high rolling mill 200 that is a target of roll replacement by a roll rearrangement device 100 of an embodiment will be described with use of
As illustrated in
In
As illustrated in
The upper work roll 2A on the vertically upper side of the metal strip 1 is in contact with and supported by the upper first intermediate rolls 3A and 3B. The lower work roll 2B on the vertically lower side of the metal strip 1 is in contact with and supported by the lower first intermediate rolls 3C and 3D.
Furthermore, the upper first intermediate rolls 3A and 3B are in contact with and supported by the upper second intermediate drive roll 4A, the upper second intermediate roll 4B, and the upper second intermediate drive roll 4C. The lower first intermediate rolls 3C and 3D are in contact with and supported by the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F. Note that “right” and “left” in the lower second intermediate drive right roll 4D and the lower second intermediate drive left roll 4F indicate a positional relationship in the plane of paper of
The upper second intermediate drive roll 4A, the upper second intermediate roll 4B, and the upper second intermediate drive roll 4C located on the vertically upper side of the metal strip 1 among the three pairs of upper and lower second intermediate rolls 4 are in contact with and supported by the first upper backup roll A, the second upper backup roll B, the third upper backup roll C, and the fourth upper backup roll D located on the vertically upper side of the metal strip 1 among the backup rolls 5. Furthermore, the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F located on the vertically lower side of the metal strip 1 are in contact with and supported by the first lower backup roll E, the second lower backup roll F, the third lower backup roll G, and the fourth lower backup roll H located on the vertically lower side of the metal strip 1 among the backup rolls 5.
These eight backup rolls 5 are each supported by an upper mill housing 25 or a lower mill housing 26 through the tile 7 thereof, and are each fixed to the upper mill housing 25 or the lower mill housing 26 by clamping action of a tile clamp 23. Note that the housing is not limited to the configuration formed of the upper mill housing 25 and the lower mill housing 26 divided vertically and may be a mono-block housing.
Moreover, for the multi-high rolling mill 200 of the present embodiment, the roll rearrangement device 100 as illustrated in
Next, the overall configuration of the roll rearrangement device 100 will be described with use of
The roll rearrangement device 100 illustrated in
In
A plurality of wheels 112 are provided on the bottom surface of the carriage 110. The carriage 110 can travel in the axial directions of the second intermediate rolls 4 and the backup rolls 5 provided in the multi-high rolling mill 200 by a configuration in which the wheels 112 travel on a rail disposed on the ground surface of a factory in which the multi-high rolling mill 200 is installed, or the like. Note that the carriage 110 may be capable of travelling in a direction other than the axial directions of the second intermediate rolls 4 and the backup rolls 5.
The support beam 130 is a beam that is provided so as to be movable with the travelling of the carriage 110 by, for example, being attached to a tip part of the Y axis direction movable section 122 on the drive side and is taken in and out of the multi-high rolling mill 200 by the Y axis direction movable section 122.
The two roll holding sections 140 are provided at an interval in the axial direction of the support beam 130, and have a structure that can attach and detach the second intermediate roll 4 and the backup roll 5.
These roll holding sections 140 are attachments (adapters) configured to be attachable and detachable to and from two places on the support beam 130 on the drive side and the work side, and have various shapes and mechanisms so as to be capable of holding both end parts of the six second intermediate rolls 4 in total and the eight backup rolls 5 in total in rearrangement work and capable of attaching and detaching the rolls to and from the multi-high rolling mill 200.
As described in detail later, the roll holding sections 140 include, for example, holding sections 150 for the upper second intermediate roll (see
These holding sections 150 for the upper second intermediate roll, holding sections 154 for the upper second intermediate drive roll, holding sections 158 for the lower second intermediate roll, holding sections 162 for the lower second intermediate drive right roll, holding sections 166 for the lower second intermediate drive left roll, holding sections 170 for the lower backup roll, and holding sections 174 for the upper backup roll are each one set of attachments (adapters) formed of two members disposed on the drive side antecedently inserted into the multi-high rolling mill 200 in the support beam 130 and the work side closer to the Y axis direction movable section 122. Each of the two members has the same configuration.
The X axis direction movable section 120 is a part that adjusts the position of each of the roll holding sections 140 in the X axis direction with respect to the Y axis direction and the Z axis direction. The Y axis direction movable section 122 is a part that adjusts the axial direction position of each of the roll holding sections 140 in the Y axis direction. The Z axis direction movable section 124 is a part that adjusts the position of each of the roll holding sections 140 in the perpendicular direction.
These X axis direction movable section 120, Y axis direction movable section 122, and Z axis direction movable section 124 are configured by a robotic arm that can move along three axes, for example. Note that, in order to allow parallel movement of the six second intermediate rolls 4 in total and the eight backup rolls 5 in total, specifications in which the allowable load is set to a value that allows these rolls to be sufficiently held are employed.
The header holding mechanism 180 is configured to be attachable and detachable to and from the support beam 130 alternatively with the roll holding sections 140, and is a configuration that can attach and detach a pair of upper and lower coolant spray headers 9 for spraying a coolant onto the front surface and back surface of the metal strip 1 rolled by the multi-high rolling mill 200. Details thereof will be described later.
First, in the multi-high rolling mill 200 illustrated in
Thereafter, roll replacement work by the roll rearrangement device 100 of the embodiment illustrated in
Description will be made below with reference to
Description will be made below about the case in which (1) the coolant spray headers 9 are drawn and thereafter rolls are drawn in order of (2) the upper second intermediate drive roll 4A, the upper second intermediate roll 4B, and the upper second intermediate drive roll 4C, (3) the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F, (4) the second lower backup roll F and the third lower backup roll G, (5) the first lower backup roll E and the fourth lower backup roll H, (6) the second upper backup roll B and the third upper backup roll C, and (7) the first upper backup roll A and the fourth upper backup roll D. However, the order of drawing the rolls is not limited to this order.
When the state illustrated in
As illustrated in
Thereafter, the carriage 110 of the roll rearrangement device 100 is moved to the vicinity of a side surface of the multi-high rolling mill 200. Then, as illustrated in
Thereafter, the coolant spray headers 9 are taken out by taking out the header holding mechanism 180 from the multi-high rolling mill 200 together with the support beam 130 through driving the X axis direction movable section 120, the Y axis direction movable section 122, and the Z axis direction movable section 124.
When the state of
A lifting mechanism for the upper second intermediate roll 4B is turned off and, as illustrated in
Thereafter, the Z axis direction movable section 124 is driven to support both end parts of the upper second intermediate roll 4B from the lower side by the holding sections 150 for the upper second intermediate roll, and both end parts of the upper second intermediate roll 4B are held. Then, the Y axis direction movable section 122, the Z axis direction movable section 124, and the carriage 110 are driven to draw the upper second intermediate roll 4B from the inside of the multi-high rolling mill 200.
After the drawing of the upper second intermediate roll 4B, the upper second intermediate drive rolls 4A and 4C are drawn.
First, the upper second intermediate roll 4B is removed from the holding sections 150 for the upper second intermediate roll, and the holding sections 150 for the upper second intermediate roll are detached from the support beam 130. Then, as illustrated in
Thereafter, the Z axis direction movable section 124 is driven to support both end parts of the upper second intermediate drive rolls 4A and 4C from the lower side by the holding sections 154 for the upper second intermediate drive roll, and both end parts of the upper second intermediate drive rolls 4A and 4C are held. Moreover, in order to separate the upper second intermediate drive rolls 4A and 4C from a drive motor, a vibration function is turned on and a castellated coupling that connects the upper second intermediate drive rolls 4A and 4C to the drive motor is detached. Then, the Y axis direction movable section 122, the Z axis direction movable section 124, and the carriage 110 are driven to draw the upper second intermediate drive rolls 4A and 4C from the inside of the multi-high rolling mill 200.
After the drawing of the upper second intermediate drive rolls 4A and 4C, the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F are drawn. Among these rolls, the lower second intermediate roll 4E is first drawn.
First, the upper second intermediate drive rolls 4A and 4C are removed from the holding sections 154 for the upper second intermediate drive roll, and the holding sections 154 for the upper second intermediate drive roll are detached from the support beam 130. Then, as illustrated in
The hooks of the holding sections 158 for the lower second intermediate roll each have an inner circumferential part 159 that gets contact with part of the outer circumference of the neck, a rotation part 160 that rotates the inner circumferential part 159 in the circumferential direction, and a stopper 161 that stops the rotation of the rotation part 160 in the circumferential direction when the inner circumferential part 159 has been fitted to the neck.
As illustrated in
Thereafter, as illustrated in
Thereafter, the Z axis direction movable section 124 is driven to raise the lower second intermediate roll 4E, and the Y axis direction movable section 122 and the carriage 110 are driven to draw the lower second intermediate roll 4E from the inside of the multi-high rolling mill 200.
Note that, although the configuration in which the Z axis direction movable section 124 is driven to lower and raise the support beam 130 has been illustrated, it is possible to employ a configuration in which the Z axis direction movable section 124 is not driven and the holding sections 158 for the lower second intermediate roll are lowered and raised with the support beam 130 kept as it is. This is the same also regarding the various roll holding sections 140 that have been described above and will be described later.
After the drawing of the lower second intermediate roll 4E, the lower second intermediate drive right roll 4D is drawn.
First, the lower second intermediate roll 4E is removed from the holding sections 158 for the lower second intermediate roll, and the holding sections 158 for the lower second intermediate roll are detached from the support beam 130. Then, as illustrated in
Similarly to the hooks of the holding sections 158 for the lower second intermediate roll, the hooks of the holding sections 162 for the lower second intermediate drive right roll also each have an inner circumferential part 163 that gets contact with part of the outer circumference of the neck, a rotation part 164 that rotates the inner circumferential part 163 in the circumferential direction, and a stopper 165 that stops the rotation of the rotation part 164 in the circumferential direction when the inner circumferential part 163 has been fitted to the neck.
Subsequently, the Z axis direction movable section 124 is driven to lower the support beam 130, and the hooks of the holding sections 162 for the lower second intermediate drive right roll are inserted into spaces under the lower surfaces of the necks at both end parts of the lower second intermediate drive right roll 4D.
Thereafter, the rotation parts 164 are driven to rotate the inner circumferential parts 163, and the necks at both end parts of the lower second intermediate drive right roll 4D are supported from the lower side by the inner circumferential parts 163. Then, the rotation of the rotation parts 164 in the circumferential direction is stopped by the stoppers 165 to make the state in which both end parts of the lower second intermediate drive right roll 4D are held by the inner circumferential parts 163.
Thereafter, in order to separate the lower second intermediate drive right roll 4D from a drive motor, a vibration function is turned on and a castellated coupling that connects the lower second intermediate drive right roll 4D to the drive motor is detached. Then, the Z axis direction movable section 124 is driven to raise the lower second intermediate drive right roll 4D, and the Y axis direction movable section 122 and the carriage 110 are driven to draw the lower second intermediate drive right roll 4D from the inside of the multi-high rolling mill 200.
After the drawing of the lower second intermediate drive right roll 4D, the lower second intermediate drive left roll 4F is drawn.
The lower second intermediate drive right roll 4D is removed from the holding sections 162 for the lower second intermediate drive right roll, and the holding sections 162 for the lower second intermediate drive right roll are detached from the support beam 130. Then, as illustrated in
The hooks of the holding sections 166 for the lower second intermediate drive left roll each have an anti-tumbling mechanism for the lower second intermediate drive left roll 4F. For example, the anti-tumbling mechanism is composed of a flat plate part 168 that holds the neck from the lower side and a wall part 167 that holds the neck from a lateral side, and the angle formed by these flat plate part 168 and wall part 167 is an acute angle. The anti-tumbling mechanism is not limited to this configuration, and can employ an electromagnet that holds the neck by a magnetic force, a structure that causes suction adhesion of the neck, a concavity and a convexity that are each present in the neck or on the side of the holding section 166 for the lower second intermediate drive left roll and are fitted to each other, and the like.
Subsequently, the X axis direction movable section 120 is driven to insert the flat plate parts 168 into spaces under the lower surfaces of the necks at both end parts of the lower second intermediate drive left roll 4F, and the Z axis direction movable section 124 is driven to lift up the necks of the lower second intermediate drive left roll 4F.
Thereafter, in order to separate the lower second intermediate drive left roll 4F from a drive motor, a vibration function is turned on and a castellated coupling that connects the lower second intermediate drive left roll 4F to the drive motor is detached. Then, the Y axis direction movable section 122 and the carriage 110 are driven to draw the lower second intermediate drive left roll 4F from the inside of the multi-high rolling mill 200.
Note that, although the example in which the lower second intermediate drive right roll 4D is drawn earlier than the lower second intermediate drive left roll 4F has been illustrated, it is also possible to first draw the lower second intermediate drive left roll 4F by using attachments with a structure similar to that of the holding sections 162 for the lower second intermediate drive right roll and thereafter draw the lower second intermediate drive right roll 4D by using attachments with a structure similar to that of the holding sections 166 for the lower second intermediate drive left roll.
After the drawing of all of the second intermediate rolls 4, the backup rolls 5 are drawn. Among the eight backup rolls 5, first the second lower backup roll F and the third lower backup roll G are drawn.
These second lower backup roll F and third lower backup roll G are drawn in the same manner as the drawing of the lower second intermediate roll 4E by use of the holding sections 158 for the lower second intermediate roll, illustrated in the above-described
After the drawing of the second lower backup roll F and the third lower backup roll G, the first lower backup roll E and the fourth lower backup roll H are drawn. Here, the first lower backup roll E is drawn earlier.
First, the second lower backup roll For the third lower backup roll G is removed from the holding sections 158 for the lower second intermediate roll, and the holding sections 158 for the lower second intermediate roll are detached from the support beam 130. Then, as illustrated in
These holding sections 170 for the lower backup roll can be provided with the hooks each having an inner circumferential part that gets contact with part of the outer circumference of the neck, a rotation part that rotates the inner circumferential part in the circumferential direction, and a stopper that stops the rotation of the rotation part in the circumferential direction when the inner circumferential part has been fitted to the neck, similarly to the hooks of the above-described holding sections 158 for the lower second intermediate roll and holding sections 162 for the lower second intermediate drive right roll.
Thereafter, the X axis direction movable section 120 and the Z axis direction movable section 124 are driven to support both end parts of the first lower backup roll E from the lower side by the holding sections 170 for the lower backup roll, and both end parts are held. Then, the Y axis direction movable section 122 and the carriage 110 are driven to draw the first lower backup roll E from the inside of the multi-high rolling mill 200.
After the drawing of the first lower backup roll E, the fourth lower backup roll H is drawn.
First, after the first lower backup roll E is removed from the holding sections 170 for the lower backup roll, the holding sections 170 for the lower backup roll are inverted while remaining attached to the support beam 130. Then, as illustrated in
Thereafter, the X axis direction movable section 120 and the Z axis direction movable section 124 are driven to support both end parts of the fourth lower backup roll H from the lower side by the holding sections 170 for the lower backup roll, and both end parts are held. Then, the Y axis direction movable section 122 and the carriage 110 are driven to draw the fourth lower backup roll H from the inside of the multi-high rolling mill 200.
Note that a configuration in which the fourth lower backup roll H is drawn earlier than the first lower backup roll E may be employed although the example in which the first lower backup roll E is drawn earlier has been described.
After the drawing of all of the backup rolls 5 on the lower side, the first upper backup roll A, the second upper backup roll B, the third upper backup roll C, and the fourth upper backup roll D are drawn. Among the backup rolls 5 on the upper side, first the second upper backup roll B and the third upper backup roll C are drawn.
As illustrated in
After the drawing of the second upper backup roll B and the third upper backup roll C, the first upper backup roll A and the fourth upper backup roll D are drawn. Here, the first upper backup roll A is drawn earlier.
First, the second upper backup roll B and the third upper backup roll C are removed from the holding sections 154 for the upper second intermediate drive roll, and the holding sections 154 for the upper second intermediate drive roll are detached from the support beam 130. Then, as illustrated in
These holding sections 174 for the upper backup roll can be provided with the hooks each having an inner circumferential part that gets contact with part of the outer circumference of the neck, a rotation part that rotates the inner circumferential part in the circumferential direction, and a stopper that stops the rotation of the rotation part in the circumferential direction when the inner circumferential part has been fitted to the neck, similarly to the hooks of the above-described holding sections 158 for the lower second intermediate roll, holding sections 162 for the lower second intermediate drive right roll, and holding sections 170 for the lower backup roll.
Thereafter, the X axis direction movable section 120 and the Z axis direction movable section 124 are driven to support both end parts of the first upper backup roll A from the lower side by the holding sections 174 for the upper backup roll, and both end parts are held. Then, the Y axis direction movable section 122 and the carriage 110 are driven to draw the first upper backup roll A from the inside of the multi-high rolling mill 200. After the drawing of the first upper backup roll A, the fourth upper backup roll D is drawn.
First, after the first upper backup roll A is removed from the holding sections 174 for the upper backup roll, the holding sections 174 for the upper backup roll are inverted while remaining attached to the support beam 130. Then, the holding sections 174 for the upper backup roll are inserted into the center of the upper mill housing 25 together with the support beam 130 by driving the Y axis direction movable section 122 and the Z axis direction movable section 124 again.
Thereafter, the X axis direction movable section 120 and the Z axis direction movable section 124 are driven to support both end parts of the fourth upper backup roll D from the lower side by the holding sections 174 for the upper backup roll, and both end parts are held. Then, the Y axis direction movable section 122 and the carriage 110 are driven to draw the fourth upper backup roll D from the inside of the multi-high rolling mill 200.
Note that a configuration in which the fourth upper backup roll D is drawn earlier than the first upper backup roll A may be employed although the example in which the first upper backup roll A is drawn earlier has been described.
It is desirable that the procedure of attaching the backup rolls 5, the second intermediate rolls 4, the first intermediate rolls 3, and the work rolls 2 be set opposite to the procedure of the above-described
That is, it is desirable to attach the rolls in order of (1) the first upper backup roll A and the fourth upper backup roll D, (2) the second upper backup roll B and the third upper backup roll C, (3) the first lower backup roll E and the fourth lower backup roll H, (4) the second lower backup roll F and the third lower backup roll G, (5) the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F, and (6) the upper second intermediate drive roll 4A, the upper second intermediate roll 4B, and the upper second intermediate drive roll 4C. Furthermore, it is desirable to attach (7) the coolant spray headers 9 after the attaching of all of the second intermediate rolls 4 and the backup rolls 5 for replacement.
The attaching is executed in the procedure opposite to that of the drawing by using the various roll holding sections 140 used in the drawing, and therefore description of details of the attaching procedure is omitted.
Here, in the multi-high rolling mill 200, when the backup rolls 5 are replaced, the tiles 7 that fix the backup rolls 5 to the upper mill housing 25 or the lower mill housing 26 need to be drawn from the upper mill housing 25 or the lower mill housing 26 in advance before these backup rolls 5 are drawn. Similarly, also when being attached, the backup rolls 5 need to be fixed to the upper mill housing 25 or the lower mill housing 26 by the tiles 7 at last.
This drawing and attaching work of the tiles 7 is work that requires access to the backup rolls 5 in the state in which these backup rolls 5, which are heavy objects, are not fixed. Therefore, the work needs to be executed vary carefully. Accordingly, the need for making the work easier is very high.
Thus, as illustrated in
In such a tile 7A, preferably, the engagement part 7A2 is formed on an end part side of the tile main part 7A1. Moreover, it is desirable that the tile main part 7A1 be made into a trapezoidal shape in which the side antecedently inserted into the multi-high rolling mill 200 in the axial direction is the top base or the bottom base, that is, a tapered structure, and be configured in such a manner that the position of the tile main part 7A1 is settled when the tile main part 7A1 is pushed into the multi-high rolling mill 200.
Next, effects of the present embodiment will be described.
The roll rearrangement device 100 of the above-described present embodiment includes the carriage 110 that can travel in the axial directions of the second intermediate rolls 4 and the backup rolls 5 provided in the multi-high rolling mill 200, the support beam 130 that is provided so as to be movable with the travelling of the carriage 110 and taken in and out of the multi-high rolling mill 200, and the two roll holding sections that are provided with an interval in the axial direction of the support beam 130 and can attach and detach the second intermediate roll 4 and the backup roll 5.
Furthermore, in the rearrangement method for the second intermediate rolls 4 and the backup rolls 5, the carriage 110 that can travel in the axial directions of the second intermediate rolls 4 and the backup rolls 5 provided in the multi-high rolling mill 200 is equipped with the support beam 130 that is taken in and out of the multi-high rolling mill 200 and the two roll holding sections that are provided with an interval in the axial direction of the support beam 130 and can attach and detach the second intermediate roll 4 and the backup roll 5. Moreover, the roll holding sections are inserted into the inside of the multi-high rolling mill 200 by the support beam 130 and hold the second intermediate roll 4 or the backup roll 5 as the replacement target to draw it from the multi-high rolling mill 200. Furthermore, the support beam 130 is inserted into the inside of the multi-high rolling mill 200 in the state in which the second intermediate roll 4 or the backup roll 5 for replacement is held by the roll holding sections, and the second intermediate roll 4 or the backup roll 5 for replacement is attached to the multi-high rolling mill 200.
In this manner, both end parts of the roll as the rearrangement target are held by the two roll holding sections provided with an interval in the axial direction of the support beam 130. Due to this, the roll can be stably supported with small deflection of the roll. Thus, moving the roll in parallel during roll rearrangement can be executed very easily as compared with conventional configurations. Therefore, check work and the like can be reduced as compared with the conventional configurations, and thus the safety of the roll rearrangement can be improved.
Furthermore, the roll rearrangement device 100 further includes the Y axis direction movable section 122 that adjusts the axial direction position of each of the roll holding sections in the axial direction. Therefore, although the length is different for each roll, it is possible to simply deal with the difference. Accordingly, automatic replacement of rolls with various lengths can be realized.
Moreover, the roll holding sections further have the detachable hook that holds the neck of the second intermediate roll 4 or the backup roll 5 from the lower side. Due to this, in work of drawing or attaching the roll, the work can be executed with the roll held more stably. Thus, further improvement in the work efficiency can be achieved while further improvement in the safety is allowed.
Furthermore, the roll rearrangement device 100 further includes the Z axis direction movable section 124 that adjusts the position of each of the roll holding sections in the perpendicular direction and the X axis direction movable section 120 that adjusts the position of each of the roll holding sections in the orthogonal direction to the axial direction and the perpendicular direction. In addition, the hooks have the inner circumferential part that gets contact with part of the outer circumference of the neck, the rotation part that rotates the inner circumferential part in the circumferential direction, and the stopper that stops the rotation of the rotation part in the circumferential direction when the inner circumferential part has been fitted to the neck. Due to this, also when the roll holding sections 140 make access from the upper side of the roll, the roll can be drawn or attached with the necks at both ends of the roll stably held.
Moreover, the roll rearrangement device 100 further includes the Z axis direction movable section 124 that adjusts the position of each of the roll holding sections in the perpendicular direction and the X axis direction movable section 120 that adjusts the position of each of the roll holding sections in the orthogonal direction to the axial direction and the perpendicular direction. In addition, the hooks have the anti-tumbling mechanism for the second intermediate rolls 4 and the backup rolls 5. Due to this, when access is possible from a lateral side of the roll, rearrangement work can be executed with the necks of the roll held firmly and stably.
Furthermore, the roll holding sections are configured to be attachable and detachable to and from the support beam 130. Due to this, when the workspace is different for each roll, the rolls as the automatic replacement target can be increased by preparing the roll holding sections 140 with various structures. Thus, roll rearrangement work can be executed more stably.
Moreover, the roll rearrangement device 100 further includes the header holding mechanism 180 that is configured to be attachable and detachable to and from the support beam 130 and can attach and detach the pair of upper and lower coolant spray headers 9 for spraying a coolant onto the front surface and back surface of the metal strip 1 rolled by the multi-high rolling mill 200. The header holding mechanism 180 has the upper fixing section 184 that fixes, at an upper part, the upper coolant spray header 9 to be attached or detached and the lower fixing section 188 that fixes, at a lower part, the lower coolant spray header 9 to be attached or detached. This allows automatic replacement also for the coolant spray headers 9.
Furthermore, when the multi-high rolling mill 200 is a 20-high rolling mill, the rolls are drawn in order of: the upper second intermediate drive roll 4A, the upper second intermediate roll 4B, and the upper second intermediate drive roll 4C; the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F; the second lower backup roll F and the third lower backup roll G; the first lower backup roll E and the fourth lower backup roll H; the second upper backup roll B and the third upper backup roll C; and the first upper backup roll A and the fourth upper backup roll D. This allows work with gradual increase in the workspace. Therefore, more stable drawing work can be achieved.
Moreover, the coolant spray headers 9 are drawn before drawing of the second intermediate rolls 4 and the backup rolls 5 as the replacement target. This allows work with further enlargement of the workspace.
Furthermore, when the multi-high rolling mill 200 is a 20-high rolling mill, the rolls are attached in order of: the first upper backup roll A and the fourth upper backup roll D; the second upper backup roll B and the third upper backup roll C; the first lower backup roll E and the fourth lower backup roll H; the second lower backup roll F and the third lower backup roll G; the lower second intermediate drive right roll 4D, the lower second intermediate roll 4E, and the lower second intermediate drive left roll 4F; and the upper second intermediate drive roll 4A, the upper second intermediate roll 4B, and the upper second intermediate drive roll 4C. Due to this, the backup rolls 5, which are the heaviest, can be attached from a stage where the workspace has room. Therefore, the stability of work can be further enhanced.
Moreover, the coolant spray headers 9 are attached after attaching of all of the second intermediate rolls 4 and the backup rolls 5 for replacement. This can avoid reduction in the workspace due to the coolant spray headers 9.
Note that the present invention is not limited to the above-described embodiments and various modifications and applications are possible. The above-described embodiments are described in detail in order to explain the present invention in an easy-to-understand manner and are not necessarily limited to that including all configurations described.
For example, in the multi-high rolling mill, when the upper backup rolls and the lower backup rolls are replaced, the tiles that fix the upper backup rolls and the lower backup rolls to the housing need to be drawn from the housing of the rolling mill in advance before these backup rolls are drawn. Similarly, also when being attached, the backup rolls need to be fixed to the housing by the tiles.
This drawing and attaching work of the tiles is work that requires access to the upper backup rolls and the lower backup rolls in the state in which these backup rolls, which are heavy objects, are not fixed. Therefore, the work needs to be executed vary carefully. Accordingly, the need for making the work easier is very high.
Thus, for example, as another aspect of the present invention, the following aspect is employed in order to provide a tile and a rolling mill including a tile that can reduce the burden of a worker in rearrangement work of upper backup rolls and lower backup rolls as compared with conventional ones.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2023-149972 | Sep 2023 | JP | national |
