A control method for quickly resuming the production of ribbed steel bars after the damage of a universal shaft

Abstract

The present invention discloses a control method for quickly resuming the production of deformed steel bars after a universal shaft is damaged, including Step 1: confirming the rolling mill stand N corresponding to the damaged universal shaft, and taking the rolling mill unit where it is located as the variable unit; Step 2: judging whether the rolling mill adjacent to the original Nth stand rolling mill in the variable unit is a horizontal-vertical alternating empty mill. When the judgment is yes, taking the position where the horizontal-vertical alternating empty mill is located as the current use position, replacing the empty passing guide groove within the use position, installing the original Nth stand rolling mill at the use position, and installing an empty passing guide groove or a rolling mill to replace the roller table at the Nth stand position. When the judgment is no, judging whether there is an empty unit in the variable unit. When the judgment is yes, moving the original Nth stand rolling mill and the rolling mills between the original Nth stand rolling mill and the empty unit two positions in the direction of the empty unit; The control method for quickly resuming the production of deformed steel bars after a universal shaft is damaged according to the present invention can quickly resume production when the universal shaft is damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of ribbed steel rolling production, and particularly relates to a control method for quickly resuming ribbed steel production after a universal shaft is damaged. Background Art

[0002] During the ribbed steel rolling process, there are roughly four types of rolling mill units. These four types are, in sequence, the roughing mill unit, the intermediate rolling mill unit, the pre-finishing mill unit, and the finishing mill unit. Each rolling mill unit has a fixed number of rolling mills, and the rolling mills corresponding to each type of rolling mill unit are different. The main differences lie in the size and the corresponding roll types. Additionally, during the ribbed steel rolling process, it is a rolling process that alternates between horizontal rolling and vertical rolling. Some of the rolling mill stands can perform both horizontal rolling and vertical rolling. The number of passes and the sequence used in the rolling process for each ribbed steel specification are also different. Currently, advanced production lines usually have a sufficient number of stands.

[0003] During the ribbed steel production process, various problems may occur, leading to unplanned production stoppages. Most of these problems can be solved by replacing the spare parts related to rolling. For example, if the steel jams and causes the guide to be damaged, replacing the guide can quickly resume production; if the roll groove is damaged, production can be quickly resumed by replacing the rolling mill (the roll is installed on the rolling mill, and when replacing, the entire rolling mill is replaced instead of just the roll). However, the damage of some equipment will result in long-term production stoppages, causing significant economic losses.

[0004] If the universal shaft bearing of the rolling mill roll drive equipment burns out, the corresponding rolling mill stand will be unable to operate, and replacing the universal shaft takes a lot of time, which will lead to long-term production stoppages. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above deficiencies. The present invention provides a control method for quickly resuming ribbed steel production after a universal shaft is damaged, which can quickly resume production when the universal shaft is damaged.

[0006] A control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft provided by the present invention includes the following steps: Step 1, confirm the rolling mill stand N corresponding to the damaged universal shaft, and take the rolling mill unit where the original Nth stand rolling mill is located as the variable unit; Step 2, determine whether the rolling mill adjacent to the original Nth stand rolling mill in the variable unit is a horizontal-vertical alternating empty mill. When the determination result is yes, take the position where the horizontal-vertical alternating empty mill is located as the current use position, replace the empty pass guide groove in this use position, install the original Nth stand rolling mill at the use position, and install an empty pass guide groove or a rolling mill instead of a roller table at the Nth position. When the determination result is no, proceed to Step 3; Step 3, determine whether there is an empty unit in the variable unit. The empty unit is composed of two continuously adjacent empty mills. When the determination result is yes, determine the stands M and M + 1 of the two empty mills in this empty unit, and proceed to Step 4; Step 4, when M < N, move the original rolling mills from the (M + 2)th stand to the Nth stand forward by two positions in sequence so that the stands of the original rolling mills from the (M + 2)th stand to the Nth stand become the Mth stand to the (N - 2)th stand, and install an empty pass guide groove or a rolling mill instead of a roller table at the (N - 1)th stand and the Nth stand positions; when M > N, move the original rolling mills from the Nth stand to the (M - 1)th stand backward by two positions in sequence so that the stands of the original rolling mills from the Nth stand to the (M - 1)th stand become the (N + 2)th stand to the (M + 1)th stand, and use an empty pass guide groove or a rolling mill instead of a roller table at the Nth stand and the (N + 1)th stand positions.

[0007] Further, in Step 3, when it is determined that there is no empty unit in the variable unit, proceed to Step 5. The control method further includes the following steps: Step 0, prepare a predetermined number of universal rolling mills corresponding to the intermediate rolling mill units, a predetermined number of universal rolling mills corresponding to the pre-finishing mill units, and a predetermined number of universal rolling mills corresponding to the finishing mill units. The universal rolling mills have the same rolling mill model and roll model as the corresponding rolling mill units, and all the rolling grooves of the rough rolling mill units are on the rolls of the universal rolling mills corresponding to the intermediate rolling mill units, all the rolling grooves of the intermediate rolling mill units and the finishing mill units are on the rolls of the universal rolling mills corresponding to the pre-finishing mill units, and all the rolling grooves of the pre-finishing mill units are on the rolls of the universal rolling mills corresponding to the finishing mill units; Step 5, determine whether the original Nth stand rolling mill is in the finishing mill unit. When the determination result is yes, take the pre-finishing mill unit as the current use unit, and then proceed to Step 6; Step 6, determine whether the original Nth stand rolling mill is adjacent to the use unit and the last stand rolling mill of the use unit is a horizontal-vertical alternating empty mill. When the determination result is yes, proceed to Step 7; Step 7, take the position where the horizontal-vertical alternating empty mill is located as the current use position, replace the empty pass guide groove in this use position, install the universal rolling mill corresponding to the use unit as the current use rolling mill at the use position, take the rolling groove corresponding to the original Nth stand rolling mill as the use rolling groove, align the use rolling groove on the use rolling mill with the roller table, move the original Nth stand rolling mill out of the Nth position, and install an empty pass guide groove or a rolling mill instead of a roller table at this Nth position.

[0008] Further, in step 7, after installing an empty guide groove or a rolling mill instead of a roller table at the Nth pass position, proceed to step 18; the control method further includes the following steps: Step 18, mark the rolling mill corresponding to the used rolling groove of the rolling mill in the variable rolling mill group as the variable rolling mill, and adjust the rotational speed Vr of the used rolling mill, where Vr = (R1 / Rr) * V1, where R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable rolling mill group.

[0009] Further, in step 6, determine whether the original Nth pass rolling mill is adjacent to the used rolling mill group and the last pass rolling mill used is a flat-vertical alternating empty mill. When the determination is no, proceed to step 8; the control method further includes the following steps: Step 8, further determine whether there is an empty rolling mill group in the used rolling mill group. When the determination is yes, proceed to step 9, otherwise end. Step 9, let R be the pass number where the first rolling mill of the variable rolling mill group is located, M and M + 1 be the pass numbers of the empty rolling mill group, and further determine whether the empty rolling mill group is adjacent to the original Nth pass rolling mill. When the determination is yes, proceed to step 10, and when the determination is no, proceed to step 11; Step 10, take the position where the original Mth pass empty mill is located as the current used position, replace the empty guide groove within the used position, install the general rolling mill corresponding to the pre-finishing rolling mill group as the current used rolling mill at the used position, take the rolling groove corresponding to the original Nth pass rolling mill as the used rolling groove, align the used rolling groove on the used rolling mill with the roller table, remove the original Nth pass rolling mill, and install an empty guide groove or a rolling mill instead of the roller table at the Nth pass position; Step 11, replace the empty guide grooves within the positions where the original Mth pass and M + 1 pass empty mills are located, move all the rolling mills behind the (M + 1)th pass in the used rolling mill group forward by two positions, install the general rolling mills corresponding to the two used rolling mill groups as the two current used rolling mills into the (R - 2)th pass and (R - 1)th pass, select the rolling grooves of the two used rolling mills to be the rolling grooves of the original Rth pass and (R + 1)th pass rolling mills in sequence, remove the original Rth pass and (R + 1)th pass rolling mills, move the rolling mills with pass numbers greater than (R + 1) and not greater than N forward by two positions, and install an empty guide groove or a rolling mill instead of the roller table at the (N - 1)th pass position and the Nth pass position.

[0010] Further, in step 10, after installing an empty guide groove or a rolling mill instead of the roller table at the Nth pass position, proceed to step 18; in step 11, after installing an empty guide groove or a rolling mill instead of the roller table at the (N - 1)th pass position and the Nth pass position, proceed to step 18. The control method further includes the following steps: Step 18, mark the rolling mill corresponding to the used rolling groove of the rolling mill in the variable rolling mill group as the variable rolling mill, and adjust the rotational speed Vr of the used rolling mill, where Vr = (R1 / Rr) * V1, where R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable rolling mill group.

[0011] Further, in step 5, it is judged whether the original Nth rolling mill is in the finishing mill train. When the judgment result is negative, step 12 is entered. The control method further includes the following steps: Step 12, take the adjacent rear train as the current working train, and judge whether there is a horizontal-vertical alternating idle mill in the working train and whether this horizontal-vertical alternating idle mill is adjacent to the original Nth rolling mill. When the judgment result is positive, take the position where this horizontal-vertical alternating idle mill is located as the current working position and then enter step 13. When the judgment result is negative, enter step 14; Step 13, replace the bypass chute in the working position, install the general rolling mill corresponding to the working train as the current working rolling mill at the working position, select the rolling groove corresponding to the original Nth rolling mill as the current working rolling groove on the working rolling mill and align it with the roller table, and at the same time replace the original Nth rolling mill with a bypass chute or a rolling mill to replace the roller table; Step 14, judge whether there is an idle train in the adjacent rear train. When the judgment result is positive, enter step 15, otherwise, end; Step 15, record the stands of the idle train as M and M + 1, and record the last rolling mill stand of the variable train as Q. Further judge whether the idle train is adjacent to the original Nth rolling mill. When the judgment result is positive, enter step 16. When the judgment result is negative, enter step 17; Step 16, take the position where the original Mth idle mill is located as the current working position, replace the bypass chute in this working position, install the general rolling mill corresponding to the working train as the current working rolling mill at the working position, take the rolling groove corresponding to the original Nth rolling mill as the working rolling groove, align the working rolling groove on the working rolling mill with the roller table, remove the original Nth rolling mill, and install a bypass chute or a rolling mill at the Nth stand position to replace the roller table; Step 17, replace the bypass chutes in the positions where the original Mth and M + 1th idle mills are located, move all the rolling mills with stands less than M in the working train backward by two positions, load the two general rolling mills corresponding to the two working trains as the two current working rolling mills into the (Q + 1)th and (Q + 2)th stands, select the rolling grooves of these two working rolling mills to be the rolling grooves of the original (Q - 1)th and Qth rolling mills in sequence, remove the original Nth and (N + 1)th rolling mills, move all the rolling mills with stands less than (Q - 1) and not less than N in the variable train backward by two positions, and install bypass chutes or rolling mills at the Nth and (N + 1)th stand positions to replace the roller tables.

[0012] Further, in step 13, replace the original Nth pass rolling mill with an idle guiding groove or a rolling mill to replace the roller path, and then proceed to step 18; in step 16, install an idle guiding groove or a rolling mill to replace the roller path at the Nth pass position, and then proceed to step 18; in step 17, install an idle guiding groove or a rolling mill to replace the roller path at the Nth pass and (N + 1)th pass positions, and then proceed to step 18. The control method further includes the following steps: Step 18, denote the rolling mill corresponding to the rolling groove used by the rolling mill in the variable drive unit as the variable rolling mill, and adjust the rotational speed Vr of the used rolling mill, where Vr = (R1 / Rr) * V1, R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable drive unit.

[0013] Further, the predetermined quantity is at least 2.

[0014] Further, the operating power of the variable drive unit is less than the maximum power of the used unit.

[0015] The beneficial effect of the present invention is as follows: A control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft according to the present invention can quickly resume the production of deformed steel bars when the universal shaft is damaged by moving the rolling mills backward within the same unit and across units. Compared with the prior art where directly replacing the universal shaft requires shutting down the unit for one shift (12 hours), the present invention uses the method of moving and installing rolling mills and can quickly resume production in only 1 hour, which significantly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the structural schematic diagram of a control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft in a specific embodiment of the present invention;

[0017] Figure 2 is the schematic diagram of the change of the medium rolling unit in a control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft in another specific embodiment of the present invention;

[0018] Figure 3 is the schematic diagram of the change of the pre-finishing rolling unit in a control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft in another specific embodiment of the present invention.

[0019] In the figure, 1 is the original 8Hth pass rolling mill, 2 is the original 9Vth pass rolling mill, 3 is the bridge between rolling mills, 4 is the idle guiding groove, 5 is the original 10Hth pass rolling mill, 6 is the original 11Vth pass rolling mill, 7 is the original 12Hth pass rolling mill, 8 is the original 13Vth pass rolling mill, and 9 is the universal rolling mill. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In this embodiment, the rolling mill unit is divided into a rough rolling unit, an intermediate rolling unit, a pre-finishing rolling unit, and a finishing rolling unit, corresponding to 7, 4, 6, and 3 rolling mills respectively. The corresponding rolling mill types are 650 rolling mills, 550 rolling mills, 450 rolling mills, and 430 rolling mills respectively. Among them, the installation methods of the 450 and 430 rolling mills are the same and shared. Among them, the rolls corresponding to the first three rolling mills in rough rolling are 710 rolls, and the rolls corresponding to the last four rolling mills in rough rolling are 610 rolls; the rolls corresponding to the rolling mills in the intermediate rolling unit are 450 rolls, the rolls corresponding to the rolling mills in the pre-finishing rolling unit are 430 rolls (pre-finishing), and the rolls corresponding to the rolling mills in the finishing rolling unit are 430 rolls.

[0022] A control method for quickly resuming the production of ribbed steel after a universal shaft is damaged in this embodiment includes the following steps:

[0023] Step 0, prepare a predetermined number of universal rolling mills corresponding to the intermediate rolling unit, a predetermined number of universal rolling mills corresponding to the pre-finishing rolling unit, and a predetermined number of universal rolling mills corresponding to the finishing rolling unit. The universal rolling mills have the same rolling mill model and roll model as the corresponding rolling mill units, and all the rolling grooves of the rough rolling unit are provided on the rolls of the universal rolling mills corresponding to the intermediate rolling unit, all the rolling grooves of the intermediate rolling unit and the finishing rolling unit are provided on the rolls of the universal rolling mills corresponding to the pre-finishing rolling unit, and all the rolling grooves of the pre-finishing rolling unit are provided on the rolls of the universal rolling mills corresponding to the finishing rolling unit. In the universal rolling mills, all the rolling grooves on the rolls are arranged in sequence along the axial direction of the rolls. Among them, the predetermined number is at least 2.

[0024] Step 1, confirm the rolling mill stand N corresponding to the damaged universal shaft, and use the rolling mill unit where the original Nth stand rolling mill is located as the variable unit;

[0025] Step 2, judge whether the rolling mill adjacent to the original Nth stand rolling mill in the variable unit is a horizontal-vertical alternating idle mill. When the judgment is yes, use the position where the horizontal-vertical alternating idle mill is located as the current use position and replace the empty guide groove in the use position, install the original Nth stand rolling mill at the use position, and set the rotation speed at the use position to be the rotation speed of the original Nth stand rolling mill, and install an empty guide groove or a rolling mill to replace the roller path at the Nth stand position. When the judgment is no, enter Step 3;

[0026] Step 3: Determine whether there is an empty mill set in the variable mill set. The empty mill set consists of two consecutive adjacent empty mills. When it is determined that there is one, determine the passes M and M + 1 of the two empty mills in this empty mill set, and proceed to Step 4; when it is determined that there is none, proceed to Step 5.

[0027] Step 4: When M < N, move the mills from the original pass M + 2 to the original pass N forward by two positions in sequence, so that the passes of these mills from the original pass M + 2 to the original pass N become passes M to N - 2, and install empty pass guides or mills at the positions of pass N - 1 and pass N to replace the roller table, and set the rotational speeds at the positions from M to N - 2 in sequence to the rotational speeds of the mills from the original pass M + 2 to the original pass N; when M > N, move the mills from the original pass N to M - 1 backward by two positions in sequence, so that the passes of these mills from the original pass N to M - 1 become passes N + 2 to M + 1, and use empty pass guides or mills at the positions of pass N and pass N + 1 to replace the roller table, and set the rotational speeds at the positions from N + 2 to M + 1 in sequence to the rotational speeds of the mills from the original pass N to M - 1.

[0028] Step 5: Determine whether the mill at the original pass N is in the finishing mill set. When it is determined that it is, use the pre-finishing mill set as the current mill set in use, and then proceed to Step 6; when it is determined that it is not, proceed to Step 12.

[0029] Step 6: Determine whether the mill at the original pass N is adjacent to the mill set in use and the last mill in this mill set in use is a horizontal-vertical alternating empty mill. When it is determined that it is, proceed to Step 7; when it is determined that it is not, proceed to Step 8.

[0030] Step 7: Take the position where this horizontal-vertical alternating empty mill is located as the current position in use, remove the empty pass guide within this position in use, install the general mill corresponding to the mill set in use as the current mill in use at the position in use, take the rolling groove corresponding to the mill at the original pass N as the rolling groove in use, align the rolling groove on the mill in use with the roller table, move the mill at the original pass N out of the position of pass N, and install an empty pass guide or mill at the position of pass N to replace the roller table, and then proceed to Step 18.

[0031] Step 8: Further determine whether there is an empty mill set in the mill set in use. When it is determined that there is one, proceed to Step 9, otherwise end.

[0032] Step 9: Let R be the pass where the first mill in the variable mill set is located, and M, M + 1 be the passes of the empty mill set. Further determine whether the empty mill set is adjacent to the mill at the original pass N. When it is determined that it is, proceed to Step 10; when it is determined that it is not, proceed to Step 11;

[0033] Step 10: Take the position where the original Mth empty mill was located as the current usage position, replace the empty guide groove within this usage position, install the universal mill corresponding to the pre-finishing mill train as the current usage mill onto the usage position, take the rolling groove corresponding to the original Nth mill as the usage groove, align the usage groove on the usage mill with the roller table, remove the original Nth mill, and install an empty guide groove or a mill at the Nth position to replace the roller table, then proceed to Step 18.

[0034] Step 11: Replace the empty guide grooves within the positions where the original Mth and M+1th empty mills were located, move all the mills behind the (M + 1)th position in the usage mill train forward by two positions, install the universal mills corresponding to the two usage mill trains as the two current usage mills into the R-2th and R-1th positions, select the rolling grooves of these two usage mills to be the rolling grooves of the original Rth and R+1th mills in sequence, remove the Rth and R+1th mills, move the mills with positions greater than R + 1 and not greater than N forward by two positions, and install an empty guide groove or a mill at the (N - 1)th and Nth positions to replace the roller table, then proceed to Step 18.

[0035] Step 12: Take the adjacent mill train at the back as the current usage mill train, and determine whether there is a horizontal-vertical alternating empty mill in the usage mill train and whether this horizontal-vertical alternating empty mill is adjacent to the original Nth mill. When the determination is yes, take the position where this horizontal-vertical alternating empty mill is located as the current usage position and then proceed to Step 13; when the determination is no, proceed to Step 14.

[0036] Step 13: Replace the empty guide groove within the usage position, install the universal mill corresponding to the usage mill train as the current usage mill onto the usage position, select the rolling groove corresponding to the original Nth mill on the usage mill as the current usage groove and align it with the roller table, and at the same time replace the Nth mill with an empty guide groove or a mill to replace the roller table, then proceed to Step 18.

[0037] Step 14: Determine whether there is an empty mill train among the adjacent mill trains at the back. When the determination is yes, proceed to Step 15; otherwise, end (i.e., the control method of this embodiment is not applicable).

[0038] Step 15: Denote the positions of the empty mill train as M and M + 1, and denote the position of the last rolling mill in the changed mill train as Q. Further determine whether the empty mill train is adjacent to the original Nth mill. When the determination is yes, proceed to Step 16; when the determination is no, proceed to Step 17.

[0039] Step 16: Take the position where the original empty machine of the Mth pass is located as the current used position, replace the empty guide groove within this used position, install the universal rolling mill corresponding to the used unit as the current used rolling mill at the used position, take the rolling groove corresponding to the original Nth pass rolling mill as the used rolling groove, align the used rolling groove on the used rolling mill with the roller table, remove the original Nth pass rolling mill, and install an empty guide groove or a rolling mill at the Nth pass position to replace the roller table, then proceed to Step 18.

[0040] Step 17: Replace the empty guide grooves within the positions where the original empty machines of the Mth pass and the (M + 1)th pass are located. Move all the rolling mills in the used unit with passes less than M two positions backward. Install the universal rolling mills corresponding to the two used units as the two current used rolling mills into the (Q + 1)th and (Q + 2)th passes. Select the rolling grooves of these two used rolling mills to be the rolling grooves of the original (Q - 1)th and Qth pass rolling mills respectively. Remove the Nth pass and (N + 1)th pass rolling mills. Move all the rolling mills in the variable unit with passes less than (Q - 1) and not less than N two positions backward, and install empty guide grooves or rolling mills at the Nth pass and (N + 1)th positions to replace the roller table. Consider the rolling mills that are moved two positions backward and still within the corresponding unit as the backward-moved rolling mills (for example, the medium rolling mills are moved two positions backward, and the moved positions are still within the medium rolling unit. As shown in the following table, the 8Hth pass rolling mill and the 9Vth pass rolling mill are moved two positions backward to the 10Hth pass and 11Vth pass respectively, and are still within the medium rolling unit. However, if the 10Hth pass rolling mill and the 11Vth pass rolling mill are moved two positions backward and are not within the medium rolling unit, they are not considered backward-moved rolling mills). After the backward-moved rolling mills reach the corresponding passes by moving two positions backward, set the rotational speed of the corresponding pass to the rotational speed of the backward-moved rolling mill before it was moved. After Step 17 is completed, proceed to Step 18.

[0041] Step 18: Denote the rolling mill corresponding to the used rolling groove of the used rolling mill in the variable unit as the variable rolling mill, and adjust the rotational speed Vr of the used rolling mill, where Vr = (R1 / Rr) * V1, where R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable unit.

[0042] Among them, the condition for installing the used rolling mill at the used position is that the used power of the variable unit is less than the maximum power of the used unit.

[0043] Table 1 shows the rolling mill units used when rolling threaded steel with specifications of Φ16 - Φ232mm. Among them, H represents horizontal rolling, V represents vertical rolling, H / V represents horizontal-vertical alternation, 1 indicates that the rolling mill corresponding to the pass position is in use, and blank indicates that the rolling mill at the pass position is an empty machine.

[0044]

[0045] Figure 1It is the structural schematic diagram of a control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft in a specific embodiment of the present invention.

[0046] As Figure 1 shown, the upper half is the distribution schematic diagram of the normal rolling of the medium rolling mill unit, and the lower half is the distribution schematic diagram of the medium rolling mill unit after the rolling mill at the 8H stand is damaged.

[0047] As Figure 1 shown in the upper half, the medium rolling mill unit has a total of four stand positions, which are the 8H stand, the 9V stand, the 10H stand, and the 11V stand in sequence. Among them, the rolling mills in use are installed on the 8H stand and the 9V stand respectively, and the 10H stand and the 11V stand are empty mills (idle mills replace the guide channels). There is a rolling mill inter-bridge 3 between every two adjacent stands.

[0048] According to a specific embodiment of the present invention, when rolling deformed steel bars of Φ25mm specification, if the universal shaft at the 8H stand is damaged, the control method for resuming production includes the following steps:

[0049] Replace the idle guide channels 4 at the 10H stand and the 11V stand positions;

[0050] Move the original rolling mill 1 at the 8H stand and the original rolling mill 2 at the 9V stand backward by two machine positions respectively, so that they are located at the 10H stand position and the 11V stand position respectively;

[0051] Install idle guide channels 4 at the 8H stand and the 9V stand positions;

[0052] Input the corresponding rolling parameters, such as rotational speed, etc. at the operation console. Since it is moving within the same unit and the rolling mill rolls used are the same, input the same data as before.

[0053] As Figure 1 shown in the lower half, when the 8H stand is damaged, move the rolling mills at the 8H stand and the 9V stand to the 10H stand and the 11V stand positions.

[0054] Figure 2 It is the schematic diagram of the change of the medium rolling mill unit in a control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft in another specific embodiment of the present invention. Figure 2 Among them, the upper half is the distribution schematic diagram of the normal rolling of the medium rolling mill unit, and the lower half is the distribution schematic diagram of the medium rolling mill unit after the rolling mill at the 11V stand is damaged. Figure 3 It is the schematic diagram of the change of the pre-finishing mill unit in a control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft in another specific embodiment of the present invention. Figure 3In the figure, the upper part is a distribution diagram of the normal rolling of the pre-finishing mill group, and the lower part is a distribution diagram of the pre-finishing mill group after the rolling mill at the 11V position is damaged.

[0055] like Figure 2 As shown in the upper part, the intermediate rolling mill group has a total of four positions, namely the 8H position, the 9V position, the 10H position and the 11V position. Among them, the 8H position, the 9V position, the 10H position and the 11V position are all equipped with rolling mills in use, and there is a rolling mill bridge 3 between every two adjacent positions.

[0056] like Figure 3 As shown in the upper part, the pre-finishing rolling mill group has a total of six positions, namely the 12thH position, the 13thV position, the 14thH position, the 15thH / V position, the 16thH position and the 17thV position. Among them, the 12thH position and the 13thV position are respectively equipped with rolling mills in use, and the 14thH position, the 15thH / V position, the 16thH position and the 17thV position are empty mills (empty rolling mills replace guide grooves), and there is a rolling mill bridge 3 between every two adjacent positions.

[0057] According to another specific embodiment of the present invention, when rolling Φ28mm specification threaded steel, its 11v frame universal shaft is damaged, and its control method for resuming production includes the following steps:

[0058] The original 8H stand rolling mill 1, the original 9V stand rolling mill 2, and the original 10H stand rolling mill 5 remain unchanged, and the original 11V stand rolling mill 6 is replaced with an empty guide trough 4;

[0059] Replace the empty guide slot 4 at the 14H and 15H / V positions.

[0060] The original 12H stand rolling mill 7 and the original 13V stand rolling mill 8 are moved backward by two positions so as to be located at the 14H stand and 15H / V stand positions respectively.

[0061] The universal rolling mill 9 corresponding to the pre-finishing rolling mill group is installed on the frame corresponding to the 13V-stance position, and corresponds to the rolling groove of the original 11V-stance rolling mill 6.

[0062] Replace the racks corresponding to the 11V and 12H positions with the empty guide slot 4;

[0063] The operating console converts the current speed Vr of the 13Vth rolling mill, Vr= (R1 / Rr)*V1=450 / 430*703.328.

[0064] like Figure 2 and Figure 3As shown in the lower part, when the 11V pass is damaged, in the intermediate rolling mill, the 11V pass rolling mill is replaced with an empty guide groove 4. In the pre-finishing rolling mill, the 12H pass rolling mill and the 13V pass rolling mill are translated backward by two positions to be located at the 14H pass and 15H / V pass positions respectively. At this time, there is no rolling mill in the 13V pass, and the general rolling mill 9 corresponding to the pre-finishing rolling mill is used to replace the original 11V pass rolling mill and installed at the 13V pass position. There are many roll grooves on the general rolling mill 9, and the same roll grooves as those of the original 11V pass rolling mill are selected to align with the roll table of the rolling mill unit for use.

[0065] In summary, the above is a specific application example of the present invention, which does not limit the protection scope of the present invention. All technical solutions using equivalent replacements fall within the protection scope of the present invention.

Claims

1. A control method for quickly resuming the production of ribbed steel after the damage of a universal shaft, characterized in that, It includes the following steps: Step 1: Confirm the rolling mill stand N corresponding to the damaged cardan shaft, and use the rolling mill unit where the original Nth stand rolling mill is located as the variable unit; Step 2: Determine whether the rolling mill adjacent to the original Nth stand rolling mill in the variable unit is a flat-vertical alternating idle mill. When the determination result is yes, use the position where this flat-vertical alternating idle mill is located as the current use position, replace the empty pass guide groove within this use position, install the original Nth stand rolling mill at the use position, and install an empty pass guide groove or a rolling mill instead of a roller table at the Nth stand position. When the determination result is no, proceed to Step 3; Step 3: Determine whether there is an empty unit in the variable unit. The empty unit consists of two continuously adjacent idle mills. When the determination result is yes, determine the stands M and M + 1 of the two idle mills in this empty unit, and proceed to Step 4; Step 4: When M < N, move the rolling mills from the original (M + 2)th stand to the original Nth stand forward by two positions in sequence, so that the stands of the original (M + 2)th stand to the original Nth stand rolling mills become the Mth to the (N - 2)th stands, and install an empty pass guide groove or a rolling mill instead of a roller table at the (N - 1)th stand and the Nth stand positions; when M > N, move the rolling mills from the original Nth stand to the (M - 1)th stand backward by two positions in sequence, so that the stands of the original Nth stand to the (M - 1)th stand rolling mills become the (N + 2)th to the (M + 1)th stands, and use an empty pass guide groove or a rolling mill instead of a roller table at the Nth stand and the (N + 1)th stand positions; In Step 3, determine whether there is the empty unit in the variable unit. When the determination result is no, proceed to Step 5; The control method further includes the following steps: Step 0: Prepare a predetermined number of universal rolling mills corresponding to the medium rolling mill units, a predetermined number of universal rolling mills corresponding to the pre-finishing rolling mill units, and a predetermined number of universal rolling mills corresponding to the finishing rolling mill units. The universal rolling mills have the same rolling mill model and roll model as the corresponding rolling mill units, and all the rolling grooves of the rough rolling mill units are on the rolls of the universal rolling mills corresponding to the medium rolling mill units, all the rolling grooves of the medium rolling mill units and the finishing rolling mill units are on the rolls of the universal rolling mills corresponding to the pre-finishing rolling mill units, and all the rolling grooves of the pre-finishing rolling mill units are on the rolls of the universal rolling mills corresponding to the finishing rolling mill units; In Step 5, determine whether the original Nth stand rolling mill is in the finishing rolling mill unit. When the determination result is yes, use the pre-finishing rolling mill unit as the current use unit, and then proceed to Step 6; Step 6: Determine whether the original Nth stand rolling mill is adjacent to the use unit and the last stand rolling mill of this use unit is a flat-vertical alternating idle mill. When the determination result is yes, proceed to Step 7; Step 7: Use the position where this flat-vertical alternating idle mill is located as the current use position, replace the empty pass guide groove within this use position, install the universal rolling mill corresponding to the use unit as the current use rolling mill at the use position, use the rolling grooves corresponding to the original Nth stand rolling mill as the use rolling grooves, align the use rolling grooves on the use rolling mill with the roller table, move the original Nth stand rolling mill out of the Nth stand position, and install an empty pass guide groove or a rolling mill instead of a roller table at this Nth stand position.

2. The control method for quickly resuming the production of ribbed steel after the damage of a universal shaft according to claim 1, characterized in that, In Step 7, after installing an empty pass guide groove or a rolling mill instead of a roller table at this Nth stand position, proceed to Step 18; The control method further includes the following steps: In step 18, the rolling mill corresponding to the used rolling groove of the used rolling mill in the variable rolling mill set is denoted as the variable rolling mill, and the rotational speed Vr of the used rolling mill is adjusted, where Vr = (R1 / Rr)*V1. Here, R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable rolling mill set.

3. The control method for quickly resuming the production of ribbed steel after the damage of a universal shaft according to claim 1, wherein In step 6, it is judged whether the original Nth rolling mill is adjacent to the used rolling mill set and the last used rolling mill is a horizontal-vertical alternating empty mill. When the judgment is negative, step 8 is entered; The control method further includes the following steps: In step 8, it is further judged whether there is an empty rolling mill set in the used rolling mill set. When the judgment is positive, step 9 is entered; otherwise, it ends. In step 9, let R be the stand where the first rolling mill of the variable rolling mill set is located, and M, M + 1 be the stands of the empty rolling mill set. It is further judged whether the empty rolling mill set is adjacent to the original Nth rolling mill. When the judgment is positive, step 10 is entered; when the judgment is negative, step 11 is entered; In step 10, the position where the original Mth empty mill is located is used as the current used position, and the empty pass guide groove therein is replaced. The general rolling mill corresponding to the pre-finishing rolling mill set is installed at the used position as the current used rolling mill. The rolling groove corresponding to the original Nth rolling mill is used as the used rolling groove. The used rolling groove on the used rolling mill is aligned with the roller table, the original Nth rolling mill is removed, and an empty pass guide groove or a rolling mill is installed at the Nth position to replace the roller table; In step 11, the empty pass guide grooves in the positions where the original Mth and M + 1th empty mills are located are replaced. All the rolling mills behind the (M + 1)th stand in the used rolling mill set are moved forward by two positions. The two general rolling mills corresponding to the used rolling mill set are installed as the two current used rolling mills at the (R - 2)th and (R - 1)th stands. The rolling grooves of these two used rolling mills are selected as the rolling grooves of the original Rth and (R + 1)th rolling mills in sequence. The original Rth and (R + 1)th rolling mills are removed. The rolling mills with stands greater than (R + 1) and not greater than N are moved forward by two positions, and empty pass guide grooves or rolling mills are installed at the (N - 1)th and Nth positions to replace the roller table.

4. The control method for quickly resuming the production of ribbed steel after the damage of a universal shaft according to claim 3, characterized in that, In step 10, after installing an empty pass guide groove or a rolling mill at the Nth position to replace the roller table, step 18 is entered; in step 11, after installing empty pass guide grooves or rolling mills at the (N - 1)th and Nth positions to replace the roller table, step 18 is entered. The control method further includes the following steps: In step 18, the rolling mill corresponding to the used rolling groove of the used rolling mill in the variable rolling mill set is denoted as the variable rolling mill, and the rotational speed Vr of the used rolling mill is adjusted, where Vr = (R1 / Rr)*V1. Here, R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable rolling mill set.

5. The control method for quickly resuming the production of deformed steel bars after the universal shaft is damaged according to claim 1, characterized in that, In step 5, it is judged whether the original Nth rolling mill is in the finishing rolling mill set. When the judgment is negative, step 12 is entered. The control method further includes the following steps: In step 12, take the adjacent unit at the rear side as the current used unit, and determine whether there is a flat-vertical alternating empty mill in the used unit and whether the flat-vertical alternating empty mill is adjacent to the original Nth pass rolling mill. When the determination is yes, take the position where the flat-vertical alternating empty mill is located as the current used position and then enter step 13. When the determination is no, enter step 14; Step 13, replace the empty guide groove in the used position, install the universal rolling mill corresponding to the used unit as the current used rolling mill at the used position, select the rolling groove corresponding to the original Nth pass rolling mill as the current used rolling groove on the used rolling mill to align with the roller table, and at the same time replace the original Nth pass rolling mill with an empty guide groove or a rolling mill to replace the roller table; Step 14, determine whether there is such an empty unit in the adjacent unit at the rear side. When the determination is yes, enter step 15, otherwise, end; Step 15, record the passes of the empty unit as M and M + 1, and record the pass of the last rolling mill of the variable unit as Q. Further determine whether the empty unit is adjacent to the original Nth pass rolling mill. When the determination is yes, enter step 16. When the determination is no, enter step 17; Step 16, take the position where the original Mth pass empty mill is located as the current used position, replace the empty guide groove in the used position, install the universal rolling mill corresponding to the used unit as the current used rolling mill at the used position, take the rolling groove corresponding to the original Nth pass rolling mill as the used rolling groove, align the used rolling groove on the used rolling mill with the roller table, remove the original Nth pass rolling mill, and install an empty guide groove or a rolling mill to replace the roller table at the Nth pass position; Step 17, replace the empty guide grooves in the positions where the original Mth pass and M + 1 pass empty mills are located, move all the rolling mills with passes less than M in the used unit backward by two positions, install the two universal rolling mills corresponding to the used units as two current used rolling mills into the Q + 1st and Q + 2nd passes, select the rolling grooves of the two used rolling mills as the rolling grooves of the original Q - 1st and Qth pass rolling mills in sequence, remove the original Nth pass and N + 1st pass rolling mills, move all the rolling mills with passes less than Q - 1 and not less than N in the variable unit backward by two positions, and install empty guide grooves or rolling mills to replace the roller table at the Nth pass and N + 1st pass positions.

6. The control method for quickly resuming the production of ribbed steel after the damage of a universal shaft according to claim 5, characterized in that In step 13, replace the original Nth pass rolling mill with an empty guide groove or a rolling mill to replace the roller table, and then enter step 18; in step 16, install an empty guide groove or a rolling mill to replace the roller table at the Nth pass position, and then enter step 18; in step 17, install empty guide grooves or rolling mills to replace the roller table at the Nth pass and N + 1st pass positions, and then enter step 18, The control method further includes the following steps: Step 18, record the rolling mill corresponding to the used rolling groove of the used rolling mill in the variable unit as the variable rolling mill, and adjust the rotational speed Vr of the used rolling mill, Vr = (R1 / Rr) * V1, where R1 is the roll diameter of the variable rolling mill, Rr is the roll diameter of the used rolling mill, and V1 is the roll linear speed of the variable unit.

7. A control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft according to claim 1, characterized in that, The predetermined quantity is at least 2.

8. A control method for quickly resuming the production of deformed steel bars after the damage of a universal shaft according to any one of claims 1 to 7, characterized in that, The operating power of the variable unit is less than the maximum power of the operating unit.

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