JP7149741B2 - Rolling mill and rolling mill operation method - Google Patents

Description

The present disclosure relates to rolling mills and methods of operating rolling mills.

In Patent Document 1, a BD roll having a plurality of types of grooves arranged in the axial direction (for example, a centering groove, a widening groove, a groove erasing groove, a shaping groove, etc.) and a rolling method using the BD roll is disclosed. In this rolling method, rolling using the same BD roll is repeated while changing the caliber used.

JP-A-2002-45902

An object of the present disclosure is to provide a rolling apparatus effective for improving the production efficiency of rolled material.

A rolling mill according to one aspect of the present disclosure is provided in a first area of a rolling roll rotating around a roll axis that intersects a material transfer line, and a first area and a second area sandwiching the rolling roll along the transfer line. A first transfer table provided in the second area for receiving the material sent from the first area side and transferring the material to the first area side through the rolling rolls a second conveying table to send to, a third conveying table provided in the first area to receive the material sent from the second area side, provided in at least one of the first area and the second area, along the roll axis a material placement changer for changing the placement position of the material in the direction.

According to this rolling mill, the first conveying table and the third conveying table can be driven independently, so the material sent from the second area is positioned on the third conveying table. The following materials can also be loaded onto the first transport table. Therefore, as soon as the material received by the third transfer table passes through the rolling rolls, rolling of the next material can be started. This reduces the waiting time between the rolling of one material and the rolling of the next material. Therefore, it is effective in improving the production efficiency of the rolled material.

The rolling mill may further include a roll position changing section that changes the arrangement position of the rolling rolls in the direction along the roll axis, and the rolling rolls may have a plurality of grooves aligned along the roll axis on the outer periphery. Since the material cannot be conveyed between the first and third conveying tables, if the arrangement position of the rolling rolls cannot be changed, there should be holes in the corresponding positions between the first and third conveying tables. Cannot set type. For this reason, there is a possibility that either the number or the type of grooves that can be formed on the rolling rolls is restricted. On the other hand, by making it possible to change the arrangement positions of the rolling rolls, it is possible to reduce restrictions on the number and type of calibers that can be formed on the rolling rolls, and to make the rolling mill compatible with a wider variety of products.

The width of the third transport table may be greater than the width of the first transport table in the direction along the roll axis. In this case, it is possible to increase the number of rolling processes on the third transfer table than the number of rolling processes on the first transfer table. Therefore, the first transport table 3 can be released earlier. As a result, the loading of the next material onto the first transport table 3 can be started earlier, and the waiting time can be shortened more reliably.

The rolling mill includes a carry-in section that carries the material onto the first carrier table, and a material sent from the second area side that is positioned on the third carrier table and moves the material next to the material to the first carrier table. and a control unit for controlling the loading unit to load onto the. By automatically controlling the material loading timing so that the material sent from the second area is positioned on the third transport table and the material next to the material is loaded onto the first transport table, production Efficiency can be improved more reliably.

A method of operating a rolling mill according to another aspect of the present disclosure includes a first transfer provided in a first area and a second area sandwiching a rolling roll rotating around a roll axis that intersects a material transfer line. The table sends the material to the second area side through the rolling rolls, receives the material sent from the first area side by the second transfer table provided in the second area, and passes through the rolling rolls to the first area receiving the material sent from the second area side by a third transfer table provided in the first area; and placing the material sent from the second area side on the third transfer table. and loading the material next to the material into the first transport table in a state where the material is placed.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a rolling apparatus that is effective in improving the production efficiency of rolled material.

It is a top view which illustrates schematic structure of a rolling mill. It is a front view which illustrates schematic structure of a rolling mill main body. It is a figure which illustrates the hardware constitutions of a control part. 4 is a flow chart illustrating an operation procedure of a rolling mill; It is a top view which shows the state which is carrying in the first material. It is a top view which shows the state which is carrying in the first material. It is a top view which shows the state which is rolling using the 1st conveyance table. It is a top view which shows the state which has changed the arrangement|positioning of material to the 3rd conveyance table side. FIG. 4 is a plan view showing a state in which the arrangement of rolling rolls is being changed; It is a top view which shows the state which is rolling using the 3rd conveyance table. FIG. 4 is a plan view showing a state in which the arrangement of materials and the arrangement of rolling rolls are being changed; It is a top view which shows the state which is rolling using the 3rd conveyance table. It is a top view which shows the state which is carrying in the next material. It is a top view which shows the state which is carrying in the next material. FIG. 10 is a plan view showing a state in which rolling of the next material is started using the first transfer table;

Hereinafter, embodiments will be described in detail with reference to the drawings. In the explanation, the same reference numerals are given to the same elements or elements having the same function, and duplicate explanations are omitted.

[Rolling equipment]
A rolling mill 1 according to the present embodiment is a device for rolling materials (for example, steel blooms and billets). For example, the rolling mill 1 rolls the material into shaped steel.

As shown in FIG. 1, the rolling mill 1 includes a rolling mill main body 2, a first transfer table 3, a second transfer table 4, a third transfer table 5, a material arrangement change section 6, and a loading section 7. , and a control unit 100 .

The rolling mill main body 2 has rolling rolls 10 that rotate around a roll axis RL that intersects (for example, is perpendicular to) the material transfer line CL1. The roll axis RL is, for example, the center axis of the rolling roll 10 . "Intersection" includes cases where two lines are twisted relative to each other, such as an overpass.

For example, as shown in FIG. 2, the rolling mill main body 2 has two rolling rolls 10 parallel to each other, a stand 20, a shift device 30, and a rotary drive section 40. As shown in FIG. The two rolling rolls 10 are arranged vertically. The roll axis RL of each rolling roll 10 is perpendicular to the transfer line CL1 along the horizontal direction. The rolling roll 10 has a plurality of calibers 11 arranged along the roll axis RL on its outer periphery. By repeatedly rolling the same material with the rolling rolls 10 while changing the caliber 11 to be used, the material is formed into a desired material. Hereinafter, in the description of the arrangement relationship of the constituent elements, the terms "front, back, left, and right" are used for convenience. "Front, back, left, and right" mean directions when one direction along the transport line CL1 is defined as the front.

The stand 20 rotatably holds the two rolling rolls 10 . For example, the stand 20 has two holding portions 21 arranged side by side. The left holding part 21 holds the left ends of the two rolling rolls 10 rotatably. The right holding part 21 rotatably holds the right ends of the two rolling rolls 10 . For example, the holding portion 21 has an upper bearing portion 22 , a lower bearing portion 23 , a housing 24 and a screw down device 25 . The upper bearing 22 rotatably holds the end of the upper rolling roll 10 . The lower bearing portion 23 rotatably holds the end portion of the lower rolling roll 10 . A housing 24 surrounds the upper bearing portion 22 and the lower bearing portion 23 . The screw-down device 25 is attached to the upper part of the housing 24, and pushes the upper bearing portion 22 toward the lower bearing portion 23 side by hydraulic pressure, for example.

The shift device 30 (roll position changing unit) changes the arrangement positions of the rolling rolls 10 in the direction (horizontal direction) along the roll axis RL. For example, the shift device 30 changes the arrangement position of the rolling rolls 10 by moving the stand 20 along the roll axis RL. For example, the shift device 30 is a hydraulic cylinder and has a cylinder tube 31 , a piston 32 and a piston rod 33 . The cylinder tube 31 is installed on the left or right side of the stand 20 along the roll axis RL. The piston 32 is arranged in the cylinder tube 31 so as to be movable along the roll axis RL. The piston rod 33 protrudes from the piston 32 toward the stand 20 . The end of the piston rod 33 protrudes outside the cylinder tube 31 and is connected to the stand 20 .

The rotary drive unit 40 rotates the two rolling rolls 10 in opposite directions. The rotary drive unit 40 is installed on the opposite side of the shift device 30 with the rolling roll 10 interposed therebetween. For example, the rotary drive unit 40 has an electric motor 43 , a distribution speed reducer 41 and two transmission shafts 42 . The electric motor 43 generates rotational torque with electric power. The distribution speed reducer 41 reduces the rotation of the output shaft of the electric motor 43 and distributes the rotational torque generated by the electric motor 43 to the two transmission shafts 42 . The distribution speed reducer 41 rotates the two transmission shafts 42 in opposite directions according to the rotation of the output shaft of the electric motor 43 . The two transmission shafts 42 are arranged parallel to the roll axis RL, for example, and transmit the rotational torque distributed by the distribution speed reducer 41 to the two rolling rolls 10 respectively. Each transmission shaft 42 can extend and contract according to the movement of the stand 20 .

Returning to FIG. 1, the first conveying table 3 is provided in the first area A1 of the first area A1 and the second area A2 sandwiching the rolling rolls 10 along the conveying line CL1. Send material to the side. In the following description, the first area A1 is positioned behind the rolling rolls 10 and the second area A2 is positioned in front of the rolling rolls 10 for convenience.

For example, the first transport table 3 has a plurality of transport rolls 51 and a rotation drive section 52 . A plurality of transport rolls 51 are arranged along the transport line CL1. The roll axis of each transport roll 51 is parallel to the roll axis RL of the rolling roll 10 . The rotation drive unit 52 is an electric drive unit using, for example, an electric motor as a power source, and rotates the plurality of transport rolls 51 . The rotation drive unit 52 may be provided for each transport roll 51 .

The second transfer table 4 is provided in the second area A2, receives the material sent from the first area A1 side, passes the rolling rolls 10, and sends the material to the first area A1 side. For example, the second transport table 4 has a plurality of transport rolls 53 and a rotary drive section 54 . A plurality of transport rolls 53 are arranged along the transport line CL1. The roll axis of each transport roll 53 is parallel to the roll axis RL of the rolling roll 10 . The rotation drive unit 54 is an electric drive unit using, for example, an electric motor as a power source, and rotates the plurality of transport rolls 53 . The rotation drive unit 54 may be provided for each transport roll 51 .

The third conveying table 5 is provided next to (for example, the left side of) the first conveying table 3 in the first area A1, and receives materials sent from the second area A2 side. For example, the third transport table 5 has a plurality of transport rolls 55 and a rotary drive section 56 . A plurality of transport rolls 55 are arranged along the transport line CL1. The roll axis of each transport roll 55 is parallel to the roll axis RL of the rolling roll 10 . The rotation drive unit 56 is an electric drive unit using an electric motor as a power source, for example, and rotates the plurality of transport rolls 55 . The rotation drive unit 56 may be provided for each transport roll 55 .

In the horizontal direction, the area occupied by the second transport table 4 (area where the transport roll 53 extends) is divided into the area occupied by the first transport table 3 (area where the transport roll 51 extends) and the area occupied by the third transport table 5 (area where the transport roll 53 extends). 55 extends). In the horizontal direction, the width W2 of the second transport table 4 (the length of the transport rolls 53) is the width W1 of the first transport table 3 (the length of the transport rolls 51) and the width W3 of the third transport table 5 (the length of the transport rolls). 55 lengths). The width W3 of the third transport table 5 may be greater than the width W1 of the first transport table 3 in the direction along the roll axis. The width of each transport table means the width of the portion on which the material can be placed.

The material placement changing section 6 is provided in at least one of the first area A1 and the second area A2, and changes the placement position of the material in the horizontal direction. For example, the material arrangement changing unit 6 includes two side guides 61, 61 arranged at positions sandwiching the first conveying table 3 in the left-right direction, and two side guides arranged at positions sandwiching the third conveying table 5 in the left-right direction. It has guides 62, 62 and two side guides 63, 64 arranged at positions sandwiching the second transport table 4 in the left-right direction. The side guides 61, 62, 63, 64 are devices that move the material using, for example, a hydraulic actuator as a power source. The side guide 61 moves the material to the other side guide 61 side, and aligns the position of the material in the lateral direction with the position of the caliber 11 of the rolling roll 10 . The side guide 62 moves the material toward the other side guide 62 and aligns the position of the material in the lateral direction with the position of the caliber 11 of the rolling roll 10 . The side guide 63 moves the material to the side of the side guide 64 and aligns the position of the material in the lateral direction with the position of the caliber 11 of the rolling roll 10 . The side guide 64 moves the material to the side of the side guide 63 and aligns the position of the material in the left-right direction with the position of the caliber 11 of the rolling roll 10 . Note that the side guides 61 may be fixed on the first transport table 3 when there is no need to change the placement position of the material in the horizontal direction on the first transport table 3 . The side guides 62 may be fixed on the third conveying table 5 if it is not necessary to change the placement position of the material in the horizontal direction on the third conveying table 5 .

The carry-in section 7 carries the material onto the first transport table 3 . For example, the carry-in section 7 is arranged on the right side of the first transport table 3 behind the side guides 61 and 62 . The control unit 100 controls the rolling mill main body 2, the first transfer table 3, the second transfer table 4, the third transfer table 5, and the material placement changing unit so as to sequentially roll a plurality of materials according to a preset procedure. 6 and the loading section 7 are controlled.

The control executed by the control unit 100 is to control the first transfer table 3 so as to send the material from the first area A1 side to the second area A2 side via the rolling rolls 10, and to control the material to be sent from the first area A1 side. controlling the second transfer table 4 to receive the material from the second area A1 and send it to the first area A1 side through the rolling rolls 10; and controlling the third transfer table 5 to receive the material sent from the second area A2 side. and controlling the carrying-in part 7 so that the material sent from the second area A2 side is placed on the third carrying table 5, and the material next to the material is carried into the first carrying table 3. including

For example, the control unit 100 has a loading control unit 111, a transport control unit 112, a material placement control unit 113, and a roll placement control unit 114 as functional components (hereinafter referred to as "functional modules").

The carry-in control unit 111 controls the carry-in unit 7 and the first carrier table 3 so that the material is carried onto the first carrier table 3 at a preset timing. When the second and subsequent materials (hereinafter referred to as "next material") are to be carried onto the first transport table 3, the carry-in control unit 111 controls the material sent from the second area A2 (one The carrying-in section 7 is controlled so that the next material is carried onto the first conveying table 3 while the previous material) is positioned on the third conveying table 5 .

The conveying control unit 112 controls the first conveying table 3, the second conveying table 4 and the third conveying table 5 so as to convey the material between the first area A1 and the second area A2 via the rolling rolls 10. The transport control unit 112 controls at least the first transport table 3 so as to transport the material from the first area A1 side to the second area A2 side via the rolling rolls 10, and the material transported from the first area A1 side. Control the second transfer table 4 to receive the material and send it to the first area A1 side through the rolling roll 10, and control the third transfer table 5 to receive the material sent from the second area A2 side. Do and do.

If necessary, the transport control unit 112 controls the first transport table 3 so as to receive the material sent from the second area A2 side and send it again to the second area A2 side via the rolling roll 10; and controlling the third transport table 5 to receive the material sent from the second area A2 side and send it again to the second area A2 side via the rolling rolls 10 .

The material placement control unit 113 controls the material placement changing unit 6 to change the placement positions of the materials in the horizontal direction by the side guides 61 , 62 , 63 , 64 . The roll placement control section 114 controls the shift device 30 to change the placement positions of the rolling rolls 10 in the direction along the roll axis RL.

The control unit 100 is composed of one or more control computers. For example, the control unit 100 has a circuit 120 shown in FIG. Circuitry 120 has one or more processors 121 , memory 122 , storage 123 , and input/output ports 124 . The storage 123 has a computer-readable storage medium such as a hard disk. The storage medium stores a program for causing the rolling mill 1 to execute an operating procedure, which will be described later. The storage medium may be a removable medium such as a non-volatile semiconductor memory, a magnetic disk and an optical disk. The memory 122 temporarily stores the program loaded from the storage medium of the storage 123 and the calculation result by the processor 121 . The processor 121 cooperates with the memory 122 to execute the above programs, thereby configuring each of the above functional modules. The input/output port 124 exchanges electrical signals with the rolling mill main body 2, the first transfer table 3, the second transfer table 4, the third transfer table 5, the carry-in unit 7, and the shift device 30 in accordance with commands from the processor 121. Do input and output. Note that the hardware configuration of the control unit 100 is not necessarily limited to configuring each functional module by a program. For example, each functional module of the control unit 100 may be composed of a dedicated logic circuit or an ASIC (Application Specific Integrated Circuit) integrated with this.

[Operating procedure]
Next, an operating procedure of the rolling mill 1 will be described as an example of a method of operating the rolling mill. This operating procedure consists of sending the material from the first area A1 side to the second area A2 side via the rolling rolls 10 by the first transfer table 3, and transferring the material sent from the first area A1 side to the second transfer stage. Received by the table 4 and sent from the second area A2 side to the first area A1 side via the rolling roll 10; Carrying in the material next to the material sent from the area A2 side to the first conveying table 3 in a state where the material is positioned on the third conveying table 5 .

As shown in FIG. 4, the control unit 100 executes steps S01, S02 and S03. In step S01, the carry-in control unit 111 controls the carry-in unit 7 so that the material RM1 to be rolled is carried onto the first transfer table 3 (see FIG. 5), and the transfer control unit 112 transfers the material RM1 to the rolling rolls. The first conveying table 3 is controlled so as to convey to the vicinity of 10 (see FIG. 6).

In step S02, the transport control unit 112 controls the first transport table 3 and the second transport table 4 to start transporting the material RM1 from one side of the first area A1 and the second area A2 to the other side. (See FIG. 7). Immediately before step S02, when the material RM1 is positioned on the first transport table 3, the transport control unit 112 starts transporting the material RM1 from the first area A1 side to the second area A2 side via the rolling rolls 10. The first conveying table 3 is controlled to do so, and the second conveying table 4 is controlled to start receiving the material RM1 sent from the first area A1 side. Immediately before step S02, when the material RM1 is positioned on the second transport table 4, the transport control unit 112 starts transporting the material RM1 from the second area A2 side to the first area A1 side via the rolling rolls 10. The second conveying table 4 is controlled to do so, and the first conveying table 3 is controlled to start receiving the material RM1 sent from the second area A2 side.

In step S<b>03 , the transport control unit 112 confirms whether or not the currently-executed transport pass for the material RM<b>1 is the final transport pass using the first transport table 3 . Here, "path" means a one-way transport route between the first area A1 and the second area A2. "Final pass" means the last one-way transport pass between the first area A1 and the second area A2.

In step S03, if the currently executed conveying pass of the material RM1 is not the final conveying pass using the first conveying table 3, the control unit 100 executes steps S04, S05, and S06. In step S<b>04 , the transport control unit 112 waits for the material to pass through the rolling rolls 10 . In step S05, the transport control unit 112 controls the first transport table 3 and the second transport table 4 to stop transporting the material RM1 from one side of the first area A1 and the second area A2 to the other side. . In step S06, the material placement control unit 113 controls the material placement change unit 6 so as to place the material RM1 at a preset position for the next pass, and the roll placement control unit 114 controls the material placement control unit 114 for the next pass. The shift device 30 is controlled so as to place the rolling rolls 10 at preset positions. Thereafter, control unit 100 returns the process to step S02. After that, the control unit 100 repeats the one-way transport of the material RM1 between the first area A1 and the second area A2 until the transport path of the material RM1 becomes the final pass of transport using the first transport table 3 . The final pass of the transport using the first transport table 3 is the direction in which the material RM1 is transported from the first transport table 3 to the second transport table 4 .

In step S03, if the currently executed material transfer pass is the final transfer pass using the first transfer table 3, the control unit 100 executes steps S08, S09, S11, S12, and S13. In step S<b>08 , the transport control unit 112 waits for the material RM<b>1 to pass through the rolling rolls 10 . In step S09, the material placement control unit 113 controls the material placement changing unit 6 to change the placement position of the material RM1 from within the area of the first transfer table 3 to within the area of the third transfer table 5 in the horizontal direction. do. As described above, the final pass of transport using the first transport table 3 is the direction of feeding the material RM1 from the first transport table 3 to the second transport table 4 . Therefore, the material RM1 is positioned on the second transport table 4 after step S08 is completed. Therefore, the material placement control unit 113 controls the material placement changing unit 6 so that the side guide 63 moves the material RM1 from the area corresponding to the first transfer table 3 to the area corresponding to the third transfer table 5. (See Figure 8). Here, the area corresponding to the first conveying table 3 means an area that overlaps with the first conveying table 3 in the left-right direction, and the area corresponding to the third conveying table 5 means the area that overlaps the third conveying table 5 in the left-right direction. means overlapping areas.

In step S11, the roll arrangement control section 114 controls the shift device 30 so as to arrange the rolling rolls 10 at positions preset for the next pass. For example, when the caliber 11 for the next pass is positioned between the first transport table 3 and the third transport table 5, the roll arrangement control unit 114 aligns the caliber 11 with the position of the material RM1. The shift device 30 is controlled as follows (see FIG. 9).

In step S12, the transport control unit 112 controls the second transport table 4 and the third transport table 5 to start transporting the material RM1 from one side of the first area A1 and the second area A2 to the other side. (See FIG. 10). Immediately before step S12, when the material RM1 is positioned on the third conveying table 5, the conveying control unit 112 starts conveying the material RM1 from the first area A1 side to the second area A2 side via the rolling rolls 10. The third conveying table 5 is controlled to do so, and the second conveying table 4 is controlled to start receiving the material RM1 sent from the first area A1 side. Immediately before step S12, when the material RM1 is positioned on the second conveying table 4, the conveying control unit 112 starts conveying the material RM1 from the second area A2 side to the first area A1 side via the rolling rolls 10. The second conveying table 4 is controlled to do so, and the third conveying table 5 is controlled to start receiving the material RM1 sent from the second area A2 side. In step S<b>13 , the transport control unit 112 confirms whether or not the currently-executed transport pass for the material RM<b>1 is the final transport pass using the third transport table 5 .

In step S13, if the currently executed conveying pass of the material RM1 is not the final conveying pass using the third conveying table 5, the control unit 100 executes steps S14, S15, and S16. In step S<b>14 , the transport control unit 112 waits for the material RM<b>1 to pass through the rolling rolls 10 . In step S15, the transport control unit 112 controls the second transport table 4 and the third transport table 5 to stop transporting the material RM1 from one side of the first area A1 and the second area A2 to the other side. . In step S16, the material placement control unit 113 controls the material placement change unit 6 so as to place the material RM1 at a preset position for the next pass, and the roll placement control unit 114 controls the material placement control unit 114 for the next pass. The shift device 30 is controlled so as to place the rolling rolls 10 at preset positions (see FIG. 11). After that, the control unit 100 returns the process to step S12. After that, the control unit 100 repeats one-way transportation of the material RM1 between the first area A1 and the second area A2 until the path of transportation of the material RM1 becomes the final path of transportation using the third transportation table 5 (FIG. 12). reference).

In step S13, if the currently-executed conveying pass of the material RM1 is the final conveying pass using the third conveying table 5, the control unit 100 executes step S17. In step S<b>17 , the carry-in control unit 111 confirms whether or not there is the next material RM<b>2 to be carried on the first transport table 3 .

In step S17, when there is the next material RM2 to be carried in on the first transport table 3, the control section 100 executes steps S18, S19 and S21. In step S<b>18 , the carry-in control unit 111 controls the carry-in unit so that the material RM<b>2 transported from the second area A<b>2 side is placed on the third carry table 5 and the material RM<b>2 is carried onto the first carry table 3 . 7 (see FIGS. 13 and 14). In step S<b>19 , the transport control unit 112 waits for the material to pass through the rolling rolls 10 . In step S21, the transport control unit 112 sets the material RM2 as the next rolling object (see FIG. 15). Thereafter, control unit 100 returns the process to step S02. After that, rolling of the material is sequentially repeated until there is no more material to be carried onto the first conveying table 3 . In step S17, if there is no next material RM2 to be carried onto the first transport table 3, the control section 100 completes the process.

[Effect of this embodiment]
As described above, the rolling mill 1 includes the rolling rolls 10 rotating around the roll axis RL that intersects the material transfer line CL1, and the first area A1 and the second area A1 sandwiching the rolling rolls 10 along the transfer line CL1. A first transfer table 3 provided in the first area A1 of the area A2 for sending materials to the second area A2 side via the rolling rolls 10, and a material provided in the second area A2 and sent from the first area A1 side and a second transfer table 4 for sending the material to the first area A1 side via the rolling roll 10, and a third transfer table 5 provided in the first area A1 for receiving the material sent from the second area A2 side. and a material placement changer 6 that is provided in at least one of the first area A1 and the second area A2 and that changes the placement position of the material in the direction along the roll axis RL.

If the conveying table on the first area A1 side is not divided into the first conveying table 3 and the third conveying table 5, the next material is present on the conveying table on the first area A1 side. It is difficult to load the material onto the transport table. For example, when the conveying table on the first area A1 side is conveying the previous material in the direction away from the rolling roll 10, when the next material is conveyed on the conveying table, the next material is also carried out by the rolling roll. 10 will be conveyed in the direction away from it. Therefore, even after the rolling of the previous material is completed, the next material cannot be carried onto the carrying table until the material is carried out from the carrying table. This results in a long waiting time between the rolling of one material and the rolling of the next material.

On the other hand, according to the rolling mill 1, since the first conveying table 3 and the third conveying table 5 can be driven independently, the material sent from the second area A2 side is transferred to the third conveying table 5. The next material can be carried onto the first conveying table 3 even in the upward position. Therefore, as soon as the material received by the third transfer table 5 passes the rolling rolls 10, rolling of the next material can be started. This reduces the waiting time between the rolling of one material and the rolling of the next material. Therefore, it is effective in improving the production efficiency of the rolled material.

The rolling mill 1 further includes a shift device 30 for changing the arrangement position of the rolling rolls 10 in the direction along the roll axis RL. good too. Since the material cannot be conveyed between the first conveying table 3 and the third conveying table 5, if the arrangement position of the rolling rolls 10 cannot be changed, it can be accommodated between the first conveying table 3 and the third conveying table 5. The caliber 11 cannot be provided at the position where For this reason, there is a possibility that either the number or the type of calibers 11 that can be formed on the rolling roll 10 is restricted. On the other hand, by making it possible to change the arrangement position of the rolling rolls 10, it is possible to reduce restrictions on the number and types of grooves 11 that can be formed on the rolling rolls 10, and to make the rolling mill 1 compatible with a wider variety of product types. can.

The width W3 of the third transport table 5 may be larger than the width W1 of the first transport table 3 in the direction along the roll axis RL. In this case, the number of rolling steps on the third transfer table 5 can be increased more than the number of rolling steps on the first transfer table 3 . Therefore, the first transport table 3 can be released earlier. As a result, the loading of the next material onto the first transport table 3 can be started earlier, and the waiting time can be shortened more reliably.

The rolling mill 1 has a carry-in section 7 for carrying the material onto the first conveying table 3, and a material conveyed from the second area A2 side on the third conveying table 5. may be further provided with a control unit 100 that controls the carrying-in unit 7 so as to carry the substrate onto the first conveying table 3 . To automatically control the material carry-in timing so that the material next to the material sent from the second area A2 side is placed on the third transfer table 5 and the next material is carried on the first transfer table 3. Therefore, production efficiency can be improved more reliably.

Although the embodiments have been described above, the present invention is not necessarily limited to the above-described forms, and various modifications are possible without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1... Rolling mill, 3... 1st conveying table, 4... 2nd conveying table, 5... 3rd conveying table, 6... Material arrangement|positioning change part, 7... Carry-in part, 10... Rolling roll, 11... Groove shape, 30... Shift device (roll position changing unit), 100... Control unit, A1... First area, A2... Second area, CL1... Transfer line, RL... Roll axis line, W1... Width of first transfer table 3, W3... Third width of the transport table 5;

Claims (8)

rolling rolls rotating about roll axes that intersect the material conveying line;
A first transfer table provided in the first area of the first area and the second area sandwiching the rolling rolls along the transfer line, and sending the material to the second area side through the rolling rolls;
a second transfer table provided in the second area, receiving the material sent from the first area side, and sending the material to the first area side via the rolling rolls;
a third conveying table provided in the first area and receiving the material sent from the second area;
A material placement changing unit that changes the placement position of the material in the direction along the roll axis in at least one of the first area and the second area;
A roll position changing unit that changes the arrangement position of the rolling roll in the direction along the roll axis,
A rolling mill, wherein the rolling rolls have a plurality of grooves arranged along the roll axis on the outer periphery thereof. 2. The rolling mill according to claim 1, wherein the width of said third transfer table is greater than the width of said first transfer table in the direction along said roll axis. a loading unit for loading materials onto the first transport table;
a control unit that controls the loading unit so that the material sent from the second area is positioned on the third transport table, and the material next to the material is transported onto the first transport table; The rolling mill according to claim 1 or 2, further comprising: The rolling mill according to any one of claims 1 to 3, wherein the material placement changing section has a second area side guide that changes the placement position of the material in the direction along the roll axis in the second area. . The material arrangement changing unit is
5. The rolling mill according to claim 4, further comprising a first area side guide that changes the placement position of the material in the direction along the roll axis in the first area. 6. The rolling mill according to claim 5, wherein said first area side guides include side guides for changing the arrangement position of said material in the direction along said roll axis in said first transfer table. 7. The rolling mill according to claim 5, wherein said first area side guides include side guides for changing the arrangement position of said material in the direction along said roll axis in said third transfer table. By the first transfer table provided in the first area of the first area and the second area sandwiching the rolling rolls rotating around the roll axis intersecting the material transfer line, the material is passed through the rolling rolls to the second area side sending the material;
Receiving the material sent from the first area side by a second transfer table provided in the second area;
In the second area, changing the arrangement position of the material in the direction along the roll axis from the position corresponding to the first transfer table to the position corresponding to the third transfer table provided in the first area. When,
changing the arrangement position of the rolling rolls in the direction along the roll axis;
sending the material to the first area side through the rolling rolls by the second transfer table;
Receiving the material sent from the second area side by a third transfer table provided in the first area;
A method of operating a rolling mill, including loading a material next to the material sent from the second area side onto the first transfer table while the material is positioned on the third transfer table.

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