Control method of pusher

Abstract

The invention discloses a control method of a steel pusher, which relates to steel production equipment and comprises the following steps: acquiring the actual number of steel billet groups, and setting the action times of the steel pusher according to the actual number; when the steel billet group is conveyed to a batching area of a steel rolling mill in front of a steel pusher, the steel pusher pushes the steel billet group to move to a steel batching preparation position; and detecting whether a steel billet exists in the steel storage groove or not, if no steel billet exists in the steel storage groove, triggering the steel pushing machine to carry out a steel pushing action, and subtracting one from the action frequency until the action frequency is zero. Automatic steel pushing control of the steel billet group is achieved, and the automation degree and the production efficiency of the whole regional equipment are improved.

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] The steel billet group includes 3-5 steel billets that are transferred from the continuous casting plant to the batching area of ​​the rolling mill. However, since the rolling area cannot directly receive steel billets in groups, a pre-process is required to transfer the steel billet group to the rolling area one by one. The steel pusher is the main equipment to complete the steel billet separation process. The steel pusher consists of a cylinder, a push rod, and a slide groove. The cylinder drives the push rod to push a group of steel billets forward to a fixed position, and the first steel falls into the groove through the slide rail to complete the steel billet separation function. However, the current control technology of the steel pusher has the following shortcomings: the steel pusher is manually controlled, and the start, forward and backward, stop and other actions are operated by manual buttons, which requires special personnel to operate, and the degree of automation is low. 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] A control method for a steel pusher described in the present invention obtains the actual number of a steel billet group 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 ​​a steel rolling mill in front of the steel pusher, the steel pusher pushes the steel billet group to move to a batching preparation position; and detects whether there is a steel billet in a steel storage groove. If there is no steel billet in the steel storage groove, the steel pusher is triggered to perform a steel pushing action, and the number of actions is reduced 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, when the steel pusher performs one steel pushing action, the moving distance of its push rod is the width of a steel billet.

[0007] Preferably, assuming that when the push rod of the pusher is in the initial state, the distance between the end of the push rod and the groove of the slide rail 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 one end of the steel preparation position away from the steel pusher; a correction spacing 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 spacing between the first grating sensor and the second grating sensor is the correction spacing 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 steel pushing action of the steel pusher with 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 steel pusher is controlled to move a distance equal to the width of a steel billet in one steel pushing action;

[0011] If the states of the collected electrical signals 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 steel pusher during a steel pushing action using the 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 as follows: the number of actions of the steel pusher is determined according to the actual number of steel billet groups; 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 batching area of ​​the steel rolling mill and the steel storage groove of the present invention.

[0017] Among them: 1-steel pusher, 2-rolling mill batching area, 3-steel billet group, 4-slide 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 it 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 also Figure 1A control method for a steel pusher of the present invention first obtains the actual number of the steel billet group 3. The specific method of obtaining the actual number is: obtaining a coding mark corresponding to the steel billet group 3 generated by the continuous casting plant, extracting the flow order information from the coding mark, accumulating the flow order information, and 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 mark before it is shipped from the continuous casting plant. The coding mark includes the factory time, batch, and flow number. The PLC of the steel rolling mill obtains the coding mark 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 using the actual number as the number of movements of the pusher 1.

[0021] When the steel billet group 3 is transferred to the batching area 2 of the rolling mill in front of the steel pusher 1, the steel pusher 1 pushes the steel billet group 3 to move to the steel batching preparation position, so that the steel billet group 3 is in a state to be pushed into the slide groove 4. Figure 1 The figure shows that the steel billet group 3 is located at 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 steel 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 steel billet is B, and the number of steel billets in the steel billet group 3 is X; after the push rod 6 moves a distance of AB*X, the position of the steel billet group 3 at this moment is the steel matching preparation position, and the steel billet located in the steel billet group 3 away from the steel pusher 1 is in a state to be pushed down, that is, the push rod 6 only needs to move a position of a steel billet width to effectively push the steel billet into the slide rail groove 4, and the next steel 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 billet in the steel storage groove 5 is 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 and production efficiency in the region.

[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, the present embodiment installs a first grating sensor 7 at the end of the steel preparation position away from the steel 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 steel 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 steel pusher 1 performs the steel 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 electrical signal collected by the first grating sensor 7 does not change, it means that the push rod 6 has moved too small a distance, 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, each pushing action of the pusher 1 is positively compensated with the set compensation value.

[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 for one 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 batching area 2 of the rolling mill 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 by the following formula: [(AB*X)*C] / A. As can be seen from the formula, the compensation value will be controlled within a range smaller than the compensation spacing C, ensuring that the compensated billet will not automatically drop due to excessive compensation, while also meeting the requirement of further pushing the billet into place when it is not in place.

[0029] For the setting of the correction spacing C, we can set a linkage control function: when the electrical signal states of the first grating sensor 7 and the second grating sensor 8 are changed, forcibly stopping the steel pusher 1 can effectively prevent the steel billet to be pushed from falling prematurely. Therefore, the correction spacing C only needs to be set according to the maximum over-pushing safety distance of the steel billet falling, so that it is less than or equal to the maximum over-pushing safety distance. Preferably, the correction spacing C is less than the maximum over-pushing safety distance.

[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, which 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 the steel billet group, and setting the number of actions of the steel pusher according to the actual number; when the steel billet group is transferred to the batching area of ​​the rolling mill in front of the steel pusher, the steel pusher pushes the steel billet group to move to the steel batching preparation position; Detect whether there is a steel billet in the steel storage groove. If there is no steel billet in the steel storage groove, trigger the steel pusher to perform a steel pushing action, and reduce the number of actions by one until the number of actions is zero.

2. A method for controlling 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 steel pusher performs one steel pushing action, and the moving distance of its push rod is the width of a steel billet.

4. A method for controlling a steel pusher according to claim 3, characterized in that: When the push rod of the steel pusher is in the initial state, the distance between the end of the push rod and the groove of the slide rail 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.

5. The control method of a steel pusher according to claim 4, characterized in that: A first grating sensor is installed at one end of the steel preparation position away from the steel pusher; a correction spacing C is set, and a second grating sensor is installed at the side of the first grating sensor away from the steel pusher, and the spacing between the first grating sensor and the second grating sensor is the correction spacing 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 steel pushing action of the steel pusher with 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 steel pusher is controlled to move a distance equal to the width of a steel billet in one steel pushing action; If the states of the collected electrical signals 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 steel pusher during a steel pushing action using the set compensation value.

6. A method for controlling a steel pusher according to claim 5, characterized in that: The compensation value is [(AB*X)*C] / A.

7. The control method of a steel pusher according to claim 1, characterized in that: 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.

Images