A control method for a pusher

Abstract

The application discloses a control method of a pusher, relates to a steel production device, and comprises the following steps: acquiring the actual number of a group of billets, setting the action times of the pusher according to the actual number, when the group of billets is conveyed to a steel mill batching area in front of the pusher, making the pusher push the group of billets to move to a steel preparation position, detecting whether there is a billet in a steel storage groove, if there is no billet in the steel storage groove, triggering the pusher to perform a push action, and reducing the action times by one until the action times are zero. The application realizes automatic push control of the group of billets, improves the overall equipment automation degree and production efficiency of the area.

Description

Technical Field

[0001] The present invention relates to steel production equipment, and more particularly to a control method for a steel pusher. Background Art

[0002] Billet groups, consisting of 3-5 billets, are transported together from the continuous casting plant to the batching area of ​​the rolling mill. However, since the rolling mill cannot directly receive billets in groups, a pre-process is required to transport the billets individually to the rolling mill. A pusher is the primary equipment for separating the billets. The pusher consists of a hydraulic cylinder, a push rod, and a slide rail groove. The hydraulic cylinder drives the push rod to push a group of billets forward to a fixed position, where the first billet falls into the groove via the slide rail, completing the billet separation process. However, current control technology for pushers has the following shortcomings: The pusher is manually controlled, with actions such as starting, forward and backward movement, and stopping being manually operated by buttons, requiring dedicated personnel to operate and resulting in a low level of automation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a control method for a steel pusher in view of the deficiencies in the prior art, thereby realizing automatic steel pushing control of a steel billet group.

[0004] The control method of a steel pusher described in the present invention obtains the actual number of steel billet groups and sets the number of actions of the steel pusher according to the actual number; when the steel billet group is conveyed to the batching area of ​​the rolling mill in front of the steel pusher, the steel pusher pushes the steel billet group to the steel batching preparation position; detects whether there are steel billets in the steel storage groove, and if there are no steel billets in the steel storage groove, triggers the steel pusher to perform a steel pushing action, and reduces the number of actions by one until the number of actions is zero.

[0005] Preferably, when it is detected that there is no steel billet in the steel storage groove, an action delay is started and then the steel pusher is triggered to act.

[0006] Preferably, the steel pusher performs one steel pushing action, and the moving distance of its push rod is the width of a steel billet.

[0007] Preferably, when the push rod of the pusher is in the initial state, the distance between the end of the push rod and the slide rail groove is A, the width of each steel billet is B, and the number of steel billets in the steel billet group is X; after the push rod moves a distance of AB*X, the position of the steel billet group at this moment is the steel preparation position.

[0008] Preferably, a first grating sensor is installed at the end of the steel preparation position away from the steel pusher; a correction distance C is set, and a second grating sensor is installed on the side of the first grating sensor away from the steel pusher, and the distance between the first grating sensor and the second grating sensor is the correction distance C; when the steel pusher performs the steel pushing action,

[0009] If the state of the collected electrical signal of the first grating sensor does not change, positive compensation is performed on each pushing action of the steel pusher using the set compensation value;

[0010] If the state of the collected electrical signal of the first grating sensor changes, but the state of the collected electrical signal of the second grating sensor does not change, the push rod of the pusher is controlled to move a distance equal to the width of one billet in one pushing action;

[0011] If the collected electrical signal states of the first grating sensor and the second grating sensor are changed, a negative compensation is performed on the moving distance of the push rod of the pusher during a steel pushing action using a set compensation value.

[0012] Preferably, the compensation value is [(AB*X)*C] / A.

[0013] Preferably, the actual number of roots is obtained by obtaining a coding mark corresponding to the steel billet group generated by the continuous casting plant, extracting flow information from the coding mark, accumulating the flow information, and using the accumulated result as the actual number of roots of the steel billet group.

[0014] Beneficial effects

[0015] The advantages of the present invention are that the number of actions of the steel pusher is determined according to the actual number of steel billets in the group. When the steel billet group moves to the steel preparation position and there is no steel billet in the steel storage groove, the steel pusher pushes the steel according to the number of actions, thereby realizing automatic steel pushing control of the steel billet group and improving the overall automation level and production efficiency of the regional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the top view of the steel pusher, the steel mill batching area and the steel storage groove of the present invention.

[0017] Among them: 1- steel pusher, 2- steel mill batching area, 3- steel billet group, 4- slide rail groove, 5- steel storage groove, 6- push rod, 7- first grating sensor, 8- second grating sensor. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0019] See Figure 1A method for controlling a steel pusher according to the present invention first obtains the actual number of the steel billet group 3. Specifically, the actual number is obtained by obtaining a coding identifier corresponding to the steel billet group 3 generated by the continuous casting plant, extracting flow order information from the coding identifier, and accumulating the flow order information, using the accumulated result as the actual number of the steel billet group 3.

[0020] When the billet group 3 arrives in front of the pusher 1, the next step is for the pusher 1 to move forward multiple times to push the individual billets of the billet group 3 one by one to the next process equipment, that is, the steel storage groove 5. The number of forward movements of the pusher 1 needs to be consistent with the number of billets in the billet group to ensure that all billets in the current group are pushed into place one by one. The billet group 3 has a specific coding identifier before it is shipped from the continuous casting plant. The coding identifier includes the factory time, batch, and flow number. The PLC of the steel rolling mill obtains the coding identifier through Ethernet communication and obtains its flow number information through program decoding. A non-zero flow number represents a billet. The decoding process can obtain the number of billets in the current billet group 3 by accumulating the flow number. Therefore, all the billets in the billet group 3 can be pushed to the next process equipment by using the actual number as the number of movements of the pusher 1.

[0021] When the billet group 3 is transferred to the batching area 2 of the rolling mill in front of the pusher 1, the pusher 1 pushes the billet group 3 to the batching preparation position so that the billet group 3 is in a state to be pushed into the slide groove 4. Figure 1 The figure shows the billet group 3 in the steel-matching preparation position. In this embodiment, the specific position setting method of the steel-matching preparation position is as follows: Assume that when the push rod 6 of the pusher 1 is in the initial state, the distance between the end of the push rod 6 and the slide rail groove 4 is A, the width of each billet is B, and the number of billets in the billet group 3 is X; after the push rod 6 moves a distance AB*X, the billet group 3 is now in the steel-matching preparation position. The billet in the billet group 3 away from the pusher 1 is in a state to be pushed down. In other words, the push rod 6 only needs to move a distance of one billet width to effectively push the billet into the slide rail groove 4, and the next billet is in a state to be pushed down.

[0022] After the steel billet group 3 is in place, it is first detected whether there is a steel billet in the steel storage groove 5. If there is no steel billet in the steel storage groove 5, an action delay is started, and the steel pusher 1 is triggered to perform a steel pushing action. Among them, the purpose of the delayed trigger is to avoid the problem of pushing steel before the steel billets in the steel storage groove 5 are completely removed, and to prevent the phenomenon of local steel piling. The steel pusher 1 performs a steel pushing action, and the moving distance of its push rod 6 is the width of a steel billet. Each time the push rod 6 of the steel pusher 1 moves once, the number of actions is reduced by one. Then, a steel pushing procedure is performed to detect whether there is a steel billet in the steel storage groove 5 and whether the steel pushing conditions are met. This is done until the number of actions is zero, thereby realizing automatic steel pushing control of the steel billet group 3 and improving the overall equipment automation level and production efficiency in the area.

[0023] In order to ensure that the steel billet group 3 is in place and to prevent the risk of the steel billet falling due to over-pushing during the steel pushing process, this embodiment installs a first grating sensor 7 at the end of the steel preparation position away from the pusher 1; at the same time, a correction distance C is set, and a second grating sensor 8 is installed on the side of the first grating sensor 7 away from the pusher 1, and the distance between the first grating sensor 7 and the second grating sensor 8 is the correction distance C.

[0024] When the pusher 1 performs the pushing action, the corresponding compensation / non-compensation action is performed according to the feedback value of the grating sensor. The details are as follows:

[0025] If the state of the collected electrical signal of the first grating sensor 7 does not change, it means that the moving distance of the push rod 6 is too small, the billet group 3 has not reached the steel preparation position or the billet is not at the edge of the steel mill batching area 2. Therefore, the set compensation value is used to perform positive compensation for each steel pushing action of the pusher 1.

[0026] If the state of the electrical signal collected by the first grating sensor 7 changes, but the state of the electrical signal collected by the second grating sensor 8 does not change, it means that the moving distance of the push rod 6 is normal. At this time, the moving distance of the push rod 6 of the pusher 1 to perform a pushing action is the width of a steel billet.

[0027] If the collected electrical signal states of the first grating sensor 7 and the second grating sensor 8 are changed, it means that the moving distance of the push rod 6 is too large, the billet group 3 exceeds the steel preparation position or the billet protrudes from the edge of the steel mill batching area 2 and there is a risk of falling. At this time, the set compensation value is required to perform negative compensation on the moving distance of the push rod 6 of the pusher 1 for a steel pushing action.

[0028] The compensation value can be calculated using the following formula: [(AB*X)*C] / A. This formula shows that the compensation value is controlled within a range less than the compensation spacing C, ensuring that the compensated billet does not automatically fall off due to excessive compensation. This also allows for further movement of the billet into position if it is not already in place.

[0029] Regarding the setting of the correction distance C, we can also set up a linkage control function: when the electrical signal states of the first grating sensor 7 and the second grating sensor 8 both change, the pusher 1 is forcibly stopped to effectively prevent the billet from falling prematurely. Therefore, the correction distance C only needs to be set according to the maximum safe distance for over-pushing of the billet, making it less than or equal to the maximum safe distance for over-pushing. Preferably, the correction distance C is less than the maximum safe distance for over-pushing.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A control method for a steel pusher, characterized in that: Obtaining the actual number of billets in the group, and setting the number of pusher movements according to the actual number; when the billet group is transferred to the batching area of ​​the rolling mill in front of the pusher, causing the pusher to push the billet group to move to the batching preparation position; Detecting whether there is a steel billet in the steel storage groove; if there is no steel billet in the steel storage groove, triggering the steel pusher to perform a steel pushing action, and reducing the action count by one until the action count reaches zero; The pusher performs one steel pushing action, and the moving distance of its push rod is the width of one steel billet; Assume that when the push rod of the pusher is in its initial state, the distance between the end of the push rod and the groove of the slide rail is A, the width of each billet is B, and the number of billets in the billet group is X; after the push rod moves a distance AB*X, the position of the billet group is now the steel preparation position; A first grating sensor is installed at the end of the steel preparation position away from the steel pusher; a correction distance C is set, and a second grating sensor is installed on the side of the first grating sensor away from the steel pusher, and the distance between the first grating sensor and the second grating sensor is the correction distance C; when the steel pusher performs the steel pushing action, If the state of the collected electrical signal of the first grating sensor does not change, positive compensation is performed on each pushing action of the steel pusher using the set compensation value; If the state of the collected electrical signal of the first grating sensor changes, but the state of the collected electrical signal of the second grating sensor does not change, the push rod of the pusher is controlled to move a distance equal to the width of one billet in one pushing action; If the collected electrical signal states of the first grating sensor and the second grating sensor are changed, a negative compensation is performed on the moving distance of the push rod of the pusher during a steel pushing action using a set compensation value.

2. The control method of a steel pusher according to claim 1, characterized in that: When it is detected that there is no steel billet in the steel storage groove, an action delay is started and then the steel pusher is triggered to act.

3. The control method of a steel pusher according to claim 1, characterized in that: The compensation value is [(AB*X)*C] / A.

4. The control method of a steel pusher according to claim 1, characterized in that: The actual number of steel billets is obtained by obtaining a coding mark corresponding to the steel billet group generated by a continuous casting plant, extracting flow information from the coding mark, accumulating the flow information, and using the accumulated result as the actual number of steel billets.

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