A cold-rolled steel coil slitting method and slitting system

Abstract

The present invention provides a cold-rolled steel coil slitting method and a slitting system. The slitting monitoring terminal acquires slitting parameters, calculates the weight per meter through the weight of the mother coil and the length of the mother coil; calculates the length of the first sub-coil based on the target weight of the sub-coil and sends it to the slitting execution terminal; when the first sub-coil reaches the slitting target length, the slitting execution terminal sends the current slitting coil number and the remaining strip length to the slitting monitoring terminal; the slitting monitoring terminal evenly divides the remaining length according to the remaining length, slitting mode and slitting number information to obtain the evenly divided slitting data, and the slitting monitoring terminal sends the evenly divided slitting data to the slitting execution terminal; the slitting execution terminal performs slitting again until it reaches the shearing position of the last coil. The present invention reduces the accident risk caused by small coil production in the hot rolling production line, improves the lifting efficiency and transportation efficiency; reduces the number of coil loading times and improves the operation efficiency.

Description

Background Art

[0002] In the cold-rolled sheet manufacturing process of a steel mill, hot-rolled sheets are mainly used as raw materials. At the entrance of the unit, the head and tail of each steel coil are welded to achieve continuous production without interruption, so as to achieve the continuity of materials. Generally, the weight of the hot-rolled raw material coil is greater than the requirements of the finished product contract, so the raw material coil needs to be sheared multiple times to form multiple small coils. At the same time, in the products delivered to customers, welds are not allowed, so the welds must be sheared.

[0003] Under normal production conditions, the raw material coils arriving at cold rolling are for the same customer order and the target weights of the sub-coils are the same. The cold-rolled continuous production unit can perform equal-weight slitting on the raw material coils according to the order requirements. However, in order to meet the needs of different customers and deliver orders in a timely manner, the large coils produced by hot rolling will contain multiple customer orders and sub-coils with different target weights. When producing an unequal-weight order plan, the cold-rolled production line can only perform manual slitting, which will inevitably increase the probability of calculation errors and affect the production efficiency. Summary of the Invention

[0004] In order to overcome the above deficiencies in the prior art, the present invention provides a method for slitting cold-rolled steel coils, which improves the slitting efficiency and reduces the probability of calculation errors in slitting.

[0005] The method for slitting cold-rolled steel coils includes:

[0006] S101. The slitting monitoring terminal obtains slitting parameters, and the slitting parameters include: strip slitting mode, number of slitting coils, weight of the strip mother coil, and strip mother coil length data;

[0007] S102. The slitting monitoring terminal calculates the weight per meter through the weight of the mother coil and the length of the mother coil;

[0008] S103. Calculate the length of the first sub-coil through the target weight of the sub-coil and send it to the slitting execution terminal;

[0009] S104. When the first sub-coil reaches the slitting target length, the slitting execution terminal sends the current slitting coil number and the remaining length of the strip to the slitting monitoring terminal;

[0010] S105. The slitting monitoring terminal evenly divides the remaining length according to the remaining length, slitting mode, and slitting number information to obtain the evenly divided slitting data, and the slitting monitoring terminal sends the evenly divided slitting data to the slitting execution terminal;

[0011] S106. The slitting execution terminal performs slitting again until the shearing position of the last coil is reached.

[0012] Further, it should be noted that the slitting monitoring terminal obtains the weight of the master coil defined by the user as Weight, the length of the master coil as Length, the number of split coils as n, and the target weight of the sub-coil as PWeight i , the upper limit of the sub-coil weight is PWeight_up i , the lower limit of the sub-coil weight is PWeight_low i ;

[0013] Calculate the weight per meter of the steel coil BP = Weight / Length;

[0014] Convert the lower limit of the target weight of the sub-coil to the lower limit of the length:

[0015] PLength_low i = PWeight_low i / BP;

[0016] The slitting monitoring terminal sends the remaining length RemainLength of the current strip steel to the slitting execution terminal;

[0017] When the production line is just started, the value of RemainLength is empty, then the slitting execution terminal uses the length of the master coil as the remaining length, that is, RemainLength = Length.

[0018] Further, it should be noted that if the current coil is the last sub-coil of the master coil, the slitting monitoring terminal sends the slitting mode to the slitting execution terminal as weld slitting, the slitting length is 0, and the slitting execution terminal will slit at the weld.

[0019] Further, it should be noted that if the slitting execution terminal learns that the remaining length can meet the length order requirements of all unproduced sub-coils, then subtract the sum of the lower limits of the lengths of the remaining split coils from the remaining length, and then divide by the number of remaining split coils to obtain the remaining average result. The slitting execution terminal sends the remaining average result to the slitting execution terminal.

[0020] Further, it should be noted that if the slitting execution terminal learns that the remaining length can meet the weight order requirements of all unproduced sub-coils, then subtract the sum of the lower limits of the weights of the remaining split coils from the remaining weight, and then divide by the number of remaining split coils to obtain the remaining average weight result. The slitting execution terminal sends the remaining average weight result to the slitting execution terminal.

[0021] Further, it should be noted that the set value of the length of the next sub-coil strip steel is:

[0022]

[0023]

[0024] m is the number of produced sub-coils.

[0025] Furthermore, it should be noted that if the remaining length is known by the slitting execution terminal and cannot meet the order requirements of the unproduced sub - coil length, the length of the next sub - coil is set according to the target length;

[0026] The set value of the strip length of the next sub - coil is:

[0027] PLength = PWeight m+1 / BP.

[0028] Furthermore, it should be noted that if the remaining length does not meet the lower limit of the slitting length of the next coil, the slitting execution terminal will set the slitting mode to non - splitting, send a slitting length of 0 to the slitting execution terminal. During the slitting process by the slitting execution terminal, if a weld seam is encountered, it is determined as an abnormal coil, and the abnormal status is sent to the slitting execution terminal.

[0029] Furthermore, it should be noted that the slitting monitoring terminal configures status 1 as non - splitting; status 2 as equal - weight slitting; status 3 as unequal - weight slitting;

[0030] Send the three status identifiers to the slitting execution terminal, and the slitting execution terminal executes the slitting process based on the received three status identifiers.

[0031] The present invention also provides a cold - rolled steel coil slitting system, which includes: a slitting monitoring terminal and a slitting execution terminal;

[0032] The slitting monitoring terminal is used to obtain slitting parameters. The slitting parameters include: strip slitting mode, number of slitting coils, weight of the strip mother coil, and strip mother coil length data, and calculate the weight per meter through the mother coil weight and mother coil length;

[0033] The slitting monitoring terminal calculates the length of the first sub - coil through the target sub - coil weight and sends it to the slitting execution terminal;

[0034] When the first sub - coil reaches the slitting target length, the slitting execution terminal sends the current slitting coil number and the remaining strip length to the slitting monitoring terminal;

[0035] The slitting monitoring terminal evenly divides the remaining length according to the remaining length, slitting mode, and slitting number information to obtain the evenly divided slitting data, and the slitting monitoring terminal sends the evenly divided slitting data to the slitting execution terminal;

[0036] The slitting execution terminal performs slitting again until the shearing position of the last coil is reached.

[0037] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0038] The cold-rolled steel coil slitting method involved in the present invention realizes the slitting of cold-rolled mother coils according to different target weights, expands the export coil slitting function mode, improves the control capability of the cold rolling unit, and greatly reduces the overproduction of the hot rolling-cold rolling production line without main material and the small coil rate.

[0039] The cold-rolled steel coil slitting method involved in the present invention is applied to a hot rolling production line to realize large coil production, thereby reducing the risk of accidents caused by small coil production in the hot rolling production line and improving the crane lifting efficiency and train transportation efficiency; cold rolling reduces the number of coil loading times and improves operating efficiency; at the same time, cold rolling reduces the head and tail cutting amount by realizing large coil production, thereby improving the yield rate; shortens the delivery period of some small batch orders and tail orders, thereby improving customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0041] Figure 1 The present invention is a flow chart of a cold rolled steel coil slitting method;

[0042] Figure 2 Schematic diagram of the cold rolled steel coil slitting system. DETAILED DESCRIPTION

[0043] like Figure 1 As shown, the diagram provided in the cold-rolled steel coil slitting method provided by the present invention only illustrates the basic concept of the present invention in a schematic manner, and thus the diagram only shows the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0044] The cold-rolled steel coil slitting method of the present invention can acquire and process the associated data based on artificial intelligence technology. Artificial Intelligence (AI) is the theory, method, technology and application device that uses digital computers or machines controlled by digital computers to simulate, extend and expand human intelligence, perceive the environment, acquire knowledge and use knowledge to obtain the best results.

[0045] like Figure 1The flowchart of the preferred embodiment of the cold-rolled steel coil slitting method of the present invention is shown. The cold-rolled steel coil slitting method is applied to a slitting monitoring terminal and a slitting execution terminal, which is a device that can automatically perform numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes but is not limited to a microprocessor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a digital processor (DSP), an embedded device, etc.

[0046] The slitting monitoring terminal and the slitting execution terminal may be any electronic product that can perform human-computer interaction with a user, such as a computer, a tablet computer, an interactive network television (Internet Protocol Television, IPTV), an industrial computer, and the like.

[0047] The network where the slicing monitoring terminal and the slicing execution terminal are located includes but is not limited to the Internet, a wide area network, a metropolitan area network, a local area network, a virtual private network (VPN), etc.

[0048] The following will be combined Figure 1 The cold-rolled steel coil slitting method of the present invention is described in detail. The cold-rolled steel coil slitting method can be applied to hot rolling and cold rolling production lines, for example, to perform slitting operations on hot-rolled plates or cold-rolled plates. Cold rolling reduces the number of coiling times and improves operating efficiency. At the same time, cold rolling reduces the amount of head and tail cutting by achieving large coil production, thereby improving the yield rate.

[0049] See also Figure 1 The figure is a flow chart of a cold rolled steel coil slitting method in a specific embodiment, the method comprising:

[0050] S101, the slitting monitoring terminal obtains slitting parameters, which include: strip slitting mode, number of slitting rolls, strip mother roll weight and strip mother roll length data;

[0051] S102, the slitting monitoring terminal calculates the meter weight according to the weight and length of the mother roll;

[0052] S103, calculating the length of the first sub-roll according to the target sub-roll weight and sending it to the slitting execution terminal;

[0053] S104, when the first sub-roll reaches the slitting target length, the slitting execution terminal sends the current slitting roll number and the remaining length of the strip to the slitting monitoring terminal;

[0054] S105. The slitting monitoring terminal divides the remaining length equally according to the remaining length, slitting mode, and slitting number information to obtain the equally divided slitting data, and the slitting monitoring terminal sends the equally divided slitting data to the slitting execution terminal;

[0055] S106. The slitting execution terminal performs slitting again until the shearing position of the last coil is reached.

[0056] The cold-rolled steel coil slitting method of the present invention realizes the slitting of cold-rolled master coils according to different target weights, expands the export coil splitting function mode, improves the control ability of the cold-rolling mill, and greatly reduces the overproduction of non-main materials and the small coil rate in the hot-rolling to cold-rolling production line.

[0057] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0058] Taking cold-rolled slitting as an example, the existing slitting modes are mainly weld slitting and equal-weight slitting. Before production, production personnel will configure a production plan for the slitting monitoring terminal, and the production plan includes data such as the strip slitting mode, number of slitting coils, weight of the strip master coil, and length of the strip master coil.

[0059] During the production process, the slitting monitoring terminal calculates the weight per meter through the weight of the master coil and the length of the master coil, and then calculates the length of the first sub-coil through the target weight of the sub-coil and sends it to the slitting execution terminal; when the first sub-coil reaches the target length and is sheared at the outlet, the slitting execution terminal will send a shearing completion telegram to the slitting monitoring terminal, and the telegram information includes the current slitting coil number and the remaining length of the strip. After receiving the shearing completion telegram, the slitting monitoring terminal configures the remaining length slitting method according to information such as the remaining length, slitting mode, and number of slittings, and sends it to the slitting execution terminal. The slitting execution terminal performs slitting again... and so on, and the last coil is sheared at the weld.

[0060] In the production mode, only the cases of non-slitting or equal-weight slitting of the strip are considered, and the unequal-weight slitting logic for abnormal slitting and small order merging is not designed.

[0061] In the embodiments provided by the present invention, in the existing cold-rolling process control system, only weld slitting and equal-weight slitting of the master coil are considered in the slitting logic; with the continuous improvement of the slitting requirements, it is also necessary to perform unequal slitting methods based on different weight requirements, different size requirements, etc. of the coil.

[0062] The specific slitting method is as follows: The slitting monitoring terminal configures status 1 as non-rewinding; status 2 as equal-weight slitting; status 3 as unequal-weight slitting; and sends the three status identifiers to the slitting execution terminal, which executes the slitting process based on the received three status identifiers.

[0063] Define the weight of the master coil as Weight, the length of the master coil as Length, the number of sub-coils as n, and the target weight of the sub-coil as PWeight i , the upper limit of the sub-coil weight is PWeight_up i , the lower limit of the sub-coil weight is PWeight_low i ; the weight per meter of the steel coil BP = Weight / Length;

[0064] Convert the lower limit of the target weight of the sub-coil to the lower limit of the length:

[0065] PLength_low i = PWeight_low i / BP;

[0066] The slitting monitoring terminal sends the current remaining length RemainLength of the strip steel to the slitting execution terminal via a telegram. When the production line starts up, the value of RemainLength is empty, so the slitting execution terminal uses the length of the master coil as the remaining length, that is, RemainLength = Length;

[0067] In the actual production process, due to quality and other issues, large-scale cutting waste will occur, so it is necessary to judge whether the remaining length meets the slitting length requirements of the unproduced sub-coils.

[0068] a) If the current coil is the last sub-coil of the master coil, the slitting mode sent by the slitting monitoring terminal to the slitting execution terminal is 1 (weld slitting), the slitting length is 0, and the slitting execution terminal will slit at the weld; otherwise, calculate the length of the next strip steel according to the following logic.

[0069] b) If the remaining length can make the lengths (weights) of all unproduced sub-coils meet the order requirements, subtract the sum of the lower limits of the remaining sub-roll lengths from the remaining length, and then divide by the number of remaining sub-rolls to get the remaining average result. Add the remaining average result to the lower limit of each sub-coil length to ensure that all outputs are within the weight limit as much as possible. The set value of the next strip steel length is:

[0070] m is the number of produced sub-coils.

[0071] c) If the remaining length cannot make the lengths (weights) of all unproduced sub-coils meet the order requirements, the next sub-coil length is set according to the target length. The set value of the next strip steel length is: PLength = PWeightm+1 / BP.

[0072] If the remaining length does not meet the lower limit of the next roll slitting length, the slitting mode sent to the slitting execution terminal is 1, the slitting length is 0, the slitting execution terminal executes weld slitting, and it is determined to be an abnormal roll.

[0073] The cold-rolled steel coil slitting method involved in the present invention realizes the slitting of cold-rolled mother coils according to different target weights, expands the export coil slitting function mode, improves the control capability of the cold rolling unit, and greatly reduces the overproduction of the hot rolling-cold rolling production line without main material and the small coil rate.

[0074] The cold-rolled steel coil slitting method involved in the present invention is applied to a hot rolling production line to realize large coil production, thereby reducing the risk of accidents caused by small coil production in the hot rolling production line and improving the crane lifting efficiency and train transportation efficiency; cold rolling reduces the number of coil loading times and improves operating efficiency; at the same time, cold rolling reduces the head and tail cutting amount by realizing large coil production, thereby improving the yield rate; shortens the delivery period of some small batch orders and tail orders, thereby improving customer satisfaction.

[0075] Based on the above cold-rolled steel coil slitting method, the present invention also provides a cold-rolled steel coil slitting system, such as Figure 2 As shown, the system includes: a slitting monitoring terminal and a slitting execution terminal;

[0076] The slitting monitoring terminal is used to obtain slitting parameters, including: strip slitting mode, number of slitting rolls, strip mother roll weight and strip mother roll length data, and calculate the meter weight through the mother roll weight and mother roll length;

[0077] The slitting monitoring terminal calculates the length of the first sub-roll based on the target sub-roll weight and sends it to the slitting execution terminal;

[0078] When the first sub-roll reaches the slitting target length, the slitting execution terminal sends the current slitting roll number and the remaining length of the strip to the slitting monitoring terminal;

[0079] The slitting monitoring terminal divides the remaining length equally according to the remaining length, slitting mode and slitting number information to obtain the slitting data after equal division. The slitting monitoring terminal sends the slitting data after equal division to the slitting execution terminal; the slitting execution terminal performs slitting again until it reaches the cutting position of the last roll.

[0080] During the operation of the cold-rolled steel coil slitting system provided by the present invention, the slitting monitoring terminal calculates the meter weight through the weight and length of the mother coil, and then calculates the length of the first sub-coil through the weight of the target sub-coil and sends it to the slitting execution terminal; when the first sub-coil reaches the target length and is sheared at the exit, the slitting execution terminal sends a shearing completion message to the slitting monitoring terminal, and the message information includes the current slitting coil number and the remaining length of the strip. After receiving the shearing completion message, the slitting monitoring terminal configures the remaining length slitting method according to the remaining length, slitting mode, slitting number and other information, and sends it to the slitting execution terminal, which slits again... and so on, and the last coil is sheared at the weld.

[0081] The cold-rolled steel coil slitting system provided by the present invention improves the crane hoisting efficiency and the train transportation efficiency; cold rolling reduces the number of coiling times and improves the operating efficiency. At the same time, cold rolling reduces the head and tail cutting amount by realizing large coil production and improves the yield rate.

[0082] The units and algorithm steps of each example described in the embodiments disclosed in the cold-rolled steel coil slitting system provided by the present invention can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0083] The block diagrams shown in the drawings of the cold rolled steel coil slitting system are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0084] In the cold-rolled steel coil slitting system provided by the present invention, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0085] Those skilled in the art can understand that various aspects of the cold-rolled steel coil slitting method provided by the present invention can be implemented as a system, method, or program product. Therefore, various aspects of the present disclosure can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which can be collectively referred to as "circuit", "module", or "system" here.

[0086] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for slitting cold-rolled steel coils, characterized in that, The method includes: S101. The slitting monitoring terminal obtains slitting parameters, where the slitting parameters include: strip slitting mode, number of slitted coils, weight of the master strip coil, and data of the length of the master strip coil; S102. The slitting monitoring terminal calculates the weight per meter through the weight of the master coil and the length of the master coil; S103. Calculate the length of the first sub-coil based on the target weight of the sub-coil and send it to the slitting execution terminal; S104. When the first sub-coil reaches the slitting target length, the slitting execution terminal sends the current slitting coil number and the remaining length of the strip to the slitting monitoring terminal; S105. If the slitting monitoring terminal learns that the remaining length can meet the length order requirements of all unproduced sub-coils, subtract the sum of the length lower limits of the remaining sub-coils from the remaining length, and then divide by the number of remaining sub-coils to obtain the remaining equal division result. The slitting monitoring terminal sends the remaining equal division result and the set value of the length of the next sub-strip coil to the slitting execution terminal; At this time, the set value of the length of the next sub-strip coil is: PLength = (RemainLength - ) / (n–m)+ PLength_low m+1 ; m is the number of sub-rolls produced; RemainLength is the remaining length of the current strip; n is the number of slit rolls; PLength_low i is the lower limit of the target length of the i-th sub-roll; PLength_low m+1 is the lower limit of the target length of the (m + 1)-th sub-roll; If the slitting monitoring terminal learns that the remaining length cannot meet the length order requirements of all unproduced sub-coils, the length of the next sub-coil is set according to the target length; At this time, the set value of the length of the next sub-strip coil is: PLength = / BP PWeight m+1 is the target weight of the (m + 1)-th sub-coil, where m is the number of sub-coils produced; BP is the weight per meter of the coil. S106. The slitting execution terminal performs slitting again until the shearing position of the last coil is reached.

2. The cold-rolled steel coil slitting method according to claim 1, wherein, The method further includes: The slitting monitoring terminal obtains that the weight of the master roll defined by the user is Weight, and the length of the master roll is Length , the number of slitting rolls is n , the target weight of the i-th sub-roll is , the upper limit of the weight of the i-th sub-roll is PWeight_up i , the lower limit of the weight of the i-th sub-roll is PWeight_low i ; Calculate the weight per meter of the steel coil BP = Weight / Length; Convert the lower limit of the target weight of the i-th sub-coil to the lower limit of the length: PLength_low i = / BP; The slitting execution terminal sends the remaining length of the current strip steel RemainLength to the slitting monitoring terminal; When the production line starts up, the value of RemainLength is empty, then the slitting monitoring terminal uses the length of the master coil as the remaining length, that is, RemainLength = Length.

3. The cold-rolled steel coil slitting method according to claim 1, characterized in that If the current coil is the last sub-coil of the master coil, the slitting monitoring terminal sends a slitting mode of weld slitting and a slitting length of 0 to the slitting execution terminal, and the slitting execution terminal will perform slitting at the weld.

4. The cold-rolled steel coil slitting method according to claim 1, characterized in that If the slitting monitoring terminal learns that the remaining length can meet the weight order requirements of all unproduced sub-coils, subtract the sum of the weight lower limits of the remaining sub-coils from the remaining weight, and then divide by the number of remaining slitted coils to obtain the remaining equal division weight result. The slitting monitoring terminal sends the remaining equal division weight result to the slitting execution terminal.

5. The cold-rolled steel coil slitting method according to claim 1, characterized in that The method further includes: If the remaining length does not meet the lower limit of the slitting length of the next sub-coil, the slitting monitoring terminal sends a slitting mode of no sub-rolling and a slitting length of 0 to the slitting execution terminal. The slitting execution terminal performs weld slitting and determines it as an abnormal coil.

6. The cold-rolled steel coil slitting method according to claim 1, characterized in that The method further includes: The slitting monitoring terminal configures strip slitting mode 1 as no sub-rolling; strip slitting mode 2 as equal weight slitting; strip slitting mode 3 as unequal weight slitting; Send the identification of the three strip slitting modes to the slitting execution terminal, and the slitting execution terminal executes the slitting process based on the received identification of the three strip slitting modes.

7. A cold-rolled steel coil slitting system, characterized in that, The system adopts the cold-rolled steel coil slitting method according to any one of claims 1 to 6; The system includes: a slitting monitoring terminal and a slitting execution terminal; The slitting monitoring terminal is used to obtain slitting parameters, which include: strip slitting mode, number of slitting coils, weight of the mother coil of the strip, and length data of the mother coil of the strip, and calculate the weight per meter through the weight of the mother coil and the length of the mother coil; The slitting monitoring terminal calculates the length of the first sub-coil based on the target weight of the sub-coil and sends it to the slitting execution terminal; When the first sub-coil reaches the slitting target length, the slitting execution terminal sends the current slitting coil number and the remaining length of the strip to the slitting monitoring terminal; If the slitting monitoring terminal learns that the remaining length can meet the requirements of all unproduced sub-coil length orders, it subtracts the sum of the lower limits of the remaining split coils from the remaining length, and then divides by the number of remaining split coils to obtain the remaining average result. The slitting monitoring terminal sends the remaining average result and the set value of the next sub-coil strip length to the slitting execution terminal; At this time, the set value of the next sub-coil strip length is: PLength = (RemainLength - ) / (n– m)+ PLength_low m+1 ; m is the number of sub-rolls produced; RemainLength is the remaining length of the current strip; n is the number of slit rolls; PLength_low i is the lower limit of the target length of the i-th sub-roll; PLength_low m+1 is the lower limit of the target length of the (m + 1)-th sub-roll; If the slitting monitoring terminal learns that the remaining length cannot meet the requirements of all unproduced sub-coil length orders, the length of the next sub-coil is set according to the target length; At this time, the set value of the next sub-coil strip length is: PLength = / BP PWeight m+1 is the target weight of the (m + 1)-th sub-coil, where m is the number of sub-coils produced; BP is the weight per meter of the coil. The slitting execution terminal performs slitting again until the shearing position of the last coil is reached.

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