High-speed flying shear cutting control method

Abstract

An embodiment of the present invention provides a high-speed flying shear cutting control method, which relates to the technical field of electrical automation control. The high-speed flying shear cutting control method includes: calculating the position deviation ΔP of the steel pipe pushing when the position of the cutting edge is in the crossing position; calculating the compensation value ΔT of the cutting start parameter T when the position deviation ΔP exceeds the error allowable range; updating the compensation value ΔT to the cutting start parameter T. The high-speed flying shear cutting control method can detect the cutting state of the high-speed flying shear, improve its control accuracy, improve the operation stability of the high-speed flying shear, and reduce faults.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical automation control, and in particular, to a high-speed flying shear cutting control method. Background Technique

[0002] In a continuous rolling production line, the rolling piece speed of a high-speed flying shear can reach up to 100 m / s. The control accuracy and stability of the cutting head and cutting tail equipment for high-speed rolling pieces directly restrict the operation efficiency of the entire production line and are one of the key equipment in the high-speed continuous rolling production line.

[0003] When the high-speed flying shear executes cutting the head or the tail, the position control of the pusher is completed by a high-precision servo device. Its forward and reverse processes are a fixed process. Once the forward or reverse action is started, the pusher runs at the set running speed and position. That is to say, when rotating forward, the speed and time of the pusher from the broken position to the shearing position and from the shearing position to the rolling position are fixed, and the same is true for reverse rotation. Thus, if the precise start control of the pusher is achieved, the stable control of the high-speed flying shear can be achieved.

[0004] In practical applications, the effect of pusher control can only be analyzed and judged by manually observing the shearing marks left on the blade when the machine is stopped. It is not suitable for high-paced production, and the workload is large, prone to human errors, and there are safety hazards during inspection, which is not conducive to the smooth operation of the production line. Summary of the Invention

[0005] The objectives of the present invention include providing a high-speed flying shear cutting control method, which can detect the cutting state of the high-speed flying shear, improve its control accuracy, enhance the running stability of the high-speed flying shear, and reduce faults.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a high-speed flying shear cutting control method, and the high-speed flying shear cutting control method includes:

[0008] When the blade position is in the crossing position, calculate the position deviation △P of the pusher tube;

[0009] When the position deviation △P exceeds the error tolerance range, calculate the compensation value △T of the shearing start parameter T;

[0010] Update the compensation value △T to the shearing start parameter T.

[0011] In an optional implementation manner, after the step of calculating the position deviation △P of the pusher tube when the blade position is in the crossing position, the high-speed flying shear cutting control method further includes:

[0012] When the position deviation △P does not exceed the allowable error range, it is prompted that the shearing state is normal, and the position deviation △P is displayed.

[0013] In an alternative embodiment, the calculation formula for the position deviation △P is:

[0014] △P = P - P s

[0015] Wherein, P is the position value of the steel pipe being pulled, and P s is the set shearing position value of the steel pipe being pulled.

[0016] In an alternative embodiment, before the step of calculating the position deviation △P of the steel pipe being pulled, the high-speed flying shear shearing control method further includes:

[0017] Reading the set shearing position value P of the steel pipe being pulled s and the allowable error range.

[0018] In a second aspect, the present invention provides a high-speed flying shear shearing control method, and the high-speed flying shear shearing control method includes:

[0019] When the blade position is in the crossed position, calculating the position deviation △P of the steel pipe being pulled a ;

[0020] When the position deviation △P a exceeds the allowable error range, calculating the compensation value △T of the cut-off start parameter T h ; h ;

[0021] Updating the compensation value △T h to the cut-off start parameter T h ;

[0022] In an alternative embodiment, after the step of calculating the position deviation △P of the steel pipe being pulled when the blade position is in the crossed position a , the high-speed flying shear shearing control method further includes:

[0023] When the position deviation △P a does not exceed the allowable error range, it is prompted that the cut-off state is normal, and the position deviation △P is displayed a .

[0024] In an alternative embodiment, the calculation formula for the position deviation △P a is:

[0025] △P a = P a - P sh

[0026] Wherein, P aThe position value for pushing the steel pipe, P sh The position value of the cut head set for pushing the steel pipe.

[0027] In a third aspect, the present invention provides a high-speed flying shear cutting control method, and the high-speed flying shear cutting control method includes:

[0028] When the blade position is in the crossing position, calculate the position deviation △P of the pushed steel pipe b ;

[0029] When the position deviation △P b exceeds the allowable error range, calculate the compensation value △T of the tail cutting start parameter T t ; t ;

[0030] Update the compensation value △T t to the tail cutting start parameter T t .

[0031] In an alternative embodiment, after the step of calculating the position deviation △P of the pushed steel pipe when the blade position is in the crossing position, the high-speed flying shear cutting control method further includes: b When the position deviation △P

[0032] does not exceed the allowable error range, prompt that the tail cutting state is normal and display the position deviation △P b . b .

[0033] In an alternative embodiment, the calculation formula of the position deviation △P b is:

[0034] △P b = P b - P st

[0035] In the formula, P b is the position value of the pushed steel pipe, and P st is the set tail cutting position value of the pushed steel pipe.

[0036] The beneficial effects of the high-speed flying shear cutting control method provided by the embodiments of the present invention include:

[0037] During the shearing process, by detecting the shearing state and continuously correcting the control parameters of the pushed steel pipe, the flying shear faults caused by the difficult inspection and judgment of the high-speed flying shear cutting state are eliminated, the accuracy and stability of the flying shear control are improved, the production efficiency of the production line is increased, the labor intensity of the operators is reduced, remarkable technical effects are achieved, and obvious economic and social benefits are also obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic diagram of the high-speed flying shear head;

[0040] Figure 2 It is a schematic diagram of the high-speed flying shear tail;

[0041] Figure 3 It is a flowchart of the high-speed flying shear control method provided by the first embodiment of the present invention;

[0042] Figure 4 It is a flowchart of the high-speed flying shear control method provided by the second embodiment of the present invention;

[0043] Figure 5 It is a flowchart of the high-speed flying shear control method provided by the third embodiment of the present invention.

[0044] Icon: 100 - high-speed flying shear; 110 - rotating cutter disc; 120 - shearing blade; 121 - breaking position; 122 - shearing position; 123 - rolling position; 130 - flying shear auxiliary partition; 140 - rolled piece end detector; 150 - rolling mill; 160 - rolling line; 170 - steel pusher. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0047] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0048] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0049] Please refer to Figure 1 and Figure 2 , the high-speed flying shear 100 includes a rotating cutter head 110, a pusher 170, and a flying shear auxiliary partition 130. Among them, the shearing blades 120 are fixed on the rotating cutter head 110, generally three pairs. The pusher 170 is located upstream of the rotating cutter head 110 and is driven and controlled by a high-precision servo system. A rolling mill 150 is provided upstream of the high-speed flying shear 100, a rolled piece end detector 140 is provided between the high-speed flying shear 100 and the rolling mill 150, and a rolling line 160 is provided downstream of the high-speed flying shear 100.

[0050] The running track of the pusher 170 is between the breaking position 121, the shearing position 122, and the rolling position 123. From the breaking position 121, passing through the shearing position 122, and running to the rolling position 123 is forward rotation; from the rolling position 123, passing through the shearing position 122, and running to the breaking position 121 is reverse rotation. When performing the cutting of the head of the rolled piece, the pusher 170 rotates forward, and when performing the cutting of the tail of the rolled piece, the pusher 170 rotates in reverse.

[0051] Specifically, please refer to Figure 1 , when performing the cutting of the head, the pusher 170 rotates forward, starts from the breaking position 121, and runs to the rolling position 123. During the running process, when the shearing blades 120 cross, the rolled piece is cut off. The position of the pusher 170 must be controlled at the shearing position 122, so that the cut head of the rolled piece is left in the collection box area, and the rolled piece with the head cut off is quickly guided to the rolling position 123 by the pusher 170 before the next shearing blade 120 rotates to the crossing position, realizing the head cutting operation of the flying shear.

[0052] Please refer to Figure 2 , when performing the cutting of the tail, the pusher 170 rotates in reverse, starts from the rolling position 123, and runs to the breaking position 121. During the running process, when the shearing blades 120 cross, the rolled piece is cut off. The position of the pusher 170 must be controlled at the shearing position 122, so that the rolled piece with the tail cut off is continuously rolled, and the cut tail of the rolled piece is guided to the collection box area, realizing the tail cutting operation of the flying shear.

[0053] The first embodiment

[0054] Please refer to Figure 3 , this embodiment provides a high-speed flying shear shearing control method, which can be applied to the head cutting control and also to the tail cutting control.

[0055] The high-speed flying shear shearing control method includes the following steps:

[0056] S101: Read the shearing position value P set by the pusher tube sand the error tolerance range (△P min , △P max ).

[0057] Among them, the shearing position value P s can be the head cutting position value or the tail cutting position value.

[0058] S102: Calculate the shearing start parameter T and control the start of shearing.

[0059] S103: Read the position value P of the steel pipe being pushed and the position of the cutting edge.

[0060] S104: Determine whether the cutting edge position is in the crossed position.

[0061] If the cutting edge position is not in the crossed position, return to execute S103.

[0062] If the cutting edge position is in the crossed position, then execute S105.

[0063] S105: Calculate the position deviation △P of the steel pipe being pushed.

[0064] Among them, the calculation formula for the position deviation △P is:

[0065] △P = P - P s

[0066] In the formula, P is the position value of the steel pipe being pushed, and P s is the set shearing position value of the steel pipe being pushed.

[0067] S106: Determine whether △P min ≤ △P ≤ △P max .

[0068] If △P min ≤ △P ≤ △P max , then execute S107.

[0069] S107: Prompt that the shearing state is normal, display the position deviation △P, and the shearing ends.

[0070] If △P < △P min or △P max < △P, then execute S108.

[0071] S108: Calculate the compensation value △T of the shearing start parameter T.

[0072] S109: Update the compensation value △T to the shearing start parameter T.

[0073] S110: The shearing state is abnormal, update the control parameters, and the shearing ends.

[0074] Second Embodiment

[0075] Please refer to Figure 4 , this embodiment provides a high-speed flying shear cutting control method, which is applied to the cutting head control.

[0076] The high-speed flying shear cutting control method includes the following steps:

[0077] S201: Read the cutting head position value P set for the steel pipe feeding sh and the error tolerance range (△P hmin , △P hmax ).

[0078] S202: Calculate the cutting head start parameter T h , and control the start of cutting the head.

[0079] S203: Read the position value P of the steel pipe feeding a and the blade position.

[0080] S204: Determine whether the blade position is in the crossing position.

[0081] If the blade position is not in the crossing position, return to execute S203.

[0082] If the blade position is in the crossing position, then execute S205.

[0083] S205: Calculate the position deviation △P of the steel pipe feeding a .

[0084] Among them, the calculation formula of the position deviation △P a is:

[0085] △P a = P a - P sh

[0086] In the formula, P a is the position value of the steel pipe feeding, and P sh is the cutting head position value set for the steel pipe feeding.

[0087] S206: Determine whether △P hmin ≤ △P a ≤ △P hmax .

[0088] If △P hmin ≤ △P a ≤ △P hmax , then execute S207.

[0089] S207: Prompt that the cutting head state is normal, and display the position deviation △P a , and the cutting head ends.

[0090] In △P a <△P hmin or △P hmax <△P a case, then execute S208.

[0091] S208: Calculate the compensation value △T h of the head trimming start parameter T h .

[0092] S209: Update the compensation value △T h to the head trimming start parameter T h .

[0093] S210: The head trimming state is abnormal, update the control parameters, and the head trimming ends.

[0094] Third Embodiment

[0095] Please refer to Figure 5 , this embodiment provides a high-speed flying shear cutting control method, which is applied to the tail cutting control.

[0096] The high-speed flying shear cutting control method includes the following steps:

[0097] S301: Read the tail cutting position value P st set for the steel pipe feeding and the error tolerance range (△P tmin , △P tmax ).

[0098] S302: Calculate the tail cutting start parameter T t , and control the start of tail cutting.

[0099] S303: Read the position value P b of the steel pipe feeding and the blade position.

[0100] S304: Determine whether the blade position is in the crossing position.

[0101] If the blade position is not in the crossing position, return to execute S303.

[0102] If the blade position is in the crossing position, then execute S305.

[0103] S305: Calculate the position deviation △P b of the steel pipe feeding.

[0104] Among them, the position deviation △P b is calculated by the formula:

[0105] △P b = P b - P st

[0106] Wherein, P b is the position value of the steel pipe being pushed, and P st is the set trimming position value for the steel pipe being pushed.

[0107] S306: Determine whether △P tmin ≤△P b ≤△P tmax .

[0108] If △P tmin ≤△P b ≤△P tmax , then execute S307.

[0109] S307: Prompt that the trimming state is normal and display the position deviation △P b , and the trimming ends.

[0110] If △P b <△P tmin or △P tmax <△P b , then execute S308.

[0111] S308: Calculate the compensation value △T t for the trimming start parameter T t .

[0112] S309: Update the compensation value △T t to the trimming start parameter T t .

[0113] S310: The trimming state is abnormal, update the control parameters, and the trimming ends.

[0114] The beneficial effects of the high-speed flying shear shearing control method provided by the embodiments of the present invention include:

[0115] During the shearing process, by detecting the shearing state and continuously correcting the control parameters of the steel pipe being pushed, the flying shear faults caused by the difficult inspection and judgment of the high-speed flying shear shearing state are eliminated, the accuracy and stability of the flying shear control are improved, the production efficiency of the production line is increased, the labor intensity of the operators is reduced, significant technical effects are achieved, and obvious economic and social benefits are also obtained.

[0116] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A high-speed flying shear cutting control method, characterized in that, The high-speed flying shear cutting control method includes: Read the shearing position value P set for the steel pipe s and the error tolerance range (△P min , △P max ); When the blade position is in the crossing position, calculate the position deviation △P of the steel pipe pushing, and the calculation formula of the position deviation △P is: △P = P - P s Wherein, P is the position value of the steel pipe being pulled, and P s is the shear position value set for pulling the steel pipe; When the position deviation △P does not exceed the error tolerance range, prompt that the cutting state is normal and display the position deviation △P; When the position deviation △P exceeds the error tolerance range, calculate the compensation value △T of the cutting start parameter T; Update the compensation value △T to the cutting start parameter T.

2. A high-speed flying shear cutting control method, characterized in that, The high-speed flying shear cutting control method includes: Read the cutting head position value P set for the steel pipe sh and the error tolerance range (△P hmin , △P hmax ); When the blade positions are in the crossed position, calculate the position deviation △P for pushing the steel pipe a , the position deviation △P a is calculated by the formula: △P a = P a - P sh In the formula, P a is the position value for steel pipe extraction, and P sh is the set head cutting position for steel pipe extraction; When the position deviation △P a does not exceed the allowable error range, it is prompted that the head cutting state is normal, and the position deviation △P is displayed a ; At the position deviation △P a When it exceeds the allowable error range, calculate the starting parameter T h of the compensation value △T h ; Update the compensation value ΔT h to the trimming start parameter T h .

3. A high-speed flying shear cutting control method, characterized in that, The high-speed flying shear cutting control method includes: Read the trimming position value P set for the steel pipe st and the allowable error range (△P tmin , △P tmax ); When the blade positions are in the crossed position, calculate the position deviation △P of the steel pipe being pushed b , the position deviation △P b is calculated by the following formula: △P b = P b - P st Where, P b is the position value for steel pipe extraction, and P st is the set cut-off position value for steel pipe extraction; When the position deviation △P b does not exceed the allowable error range, it is prompted that the trimming state is normal, and the position deviation △P is displayed b ; When the position deviation △P b exceeds the allowable error range, calculate the trimming start parameter T t and its compensation value △T t ; Update the compensation value ΔT t to the trimming start parameter T t .

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