Adaptive control method for long material cutting

Abstract

The present invention discloses an adaptive control method for cutting long materials. A cutting device is provided on the long material production line, and the cutting device is controlled by a main control computer; the adaptive control method for cutting long materials of the present invention comprises: S1, the main control computer determines that the head end of the long material reaches the cutting device; S2, the main control computer determines the next cutting position according to a pre-set long material cutting strategy plan; S3, the main control computer controls the cutting device to cut the long material once according to the next cutting position determined by the plan; S4, repeats S2 and S3 until all the long materials are cut. The adaptive control method of the present invention realizes the dynamic planning and adjustment of the long material cutting position during the cutting process, so that it can effectively deal with external interference such as operator intervention, abnormality of peripheral auxiliary equipment, etc., realizes adaptation to external interference, thereby improving the cutting yield rate and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to a long material cutting control technology, and in particular to a long material cutting adaptive control method. Background Art

[0002] In the industrial production field, cutting long products is a common production process. Take the production of cold-rolled strip steel in a steel company's cold rolling mill as an example. Cold-rolled strip steel is a long product. The cold-rolled strip steel produced by the cold rolling mill is very long. However, downstream customers often have certain requirements for the length of cold-rolled strip steel, which cannot be too long. Therefore, before delivering the cold-rolled strip steel to the customer, it needs to be cut into a certain length using a shearing machine to meet the customer's requirements.

[0003] Currently, before using a shearing machine to shear cold-rolled strip, the shearing positions on the strip must be planned. The shearing machine then shears the strip according to the planned positions. However, during the shearing process, various interference factors often arise, such as operator intervention, abnormalities in peripheral auxiliary equipment, and so on. These external interference factors can cause a certain shearing position to deviate from the originally planned shearing position. In such cases, the best approach is to re-plan the shearing position for the subsequent unsheared cold-rolled strip. However, the shearing positions on the cold-rolled strip are all planned in advance. Even if the aforementioned "external interference factors cause a certain shearing position to deviate from the originally planned shearing position" is encountered during the shearing process, the shearing machine will still shear the cold-rolled strip according to the originally planned shearing position. This will not only lead to a decrease in the shearing yield, but also a decrease in shearing efficiency. The same problem also exists in the cutting process of long products such as steel pipes and rails.

[0004] Chinese patent CN202110708547.7 discloses a pre-set model for long material shearing. This model is only applicable to ideal situations and is not suitable for complex on-site working conditions. When human intervention occurs in the system, the model cannot perceive and therefore cannot adapt to new changes. After human intervention, the model is no longer applicable to the remaining unsheared parts. Summary of the Invention

[0005] The object of the present invention is to provide a long material cutting adaptive control method, in which the method realizes the dynamic planning adjustment of the long material cutting position during the cutting process, thereby being able to adapt to external interference.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A long material cutting adaptive control method is provided, wherein a cutting device is provided on a long material production line and the cutting device is controlled by a main control computer;

[0008] The adaptive control method comprises:

[0009] S1, the main control computer determines that the head end of the long material reaches the cutting device;

[0010] S2, the main control computer determines the next cutting position according to the pre-set long material cutting strategy plan;

[0011] S3, the main control computer controls the cutting equipment to cut the long material according to the next cutting position determined in the plan;

[0012] S4, repeat S2 and S3 until all the long materials are cut.

[0013] Furthermore, the pre-set long material cutting strategy in S2 includes: determining the regional position of the long material where the cutting equipment is located;

[0014] S21, if it is determined that the cutting device is located in the head area of ​​the long material, the next cutting position is determined according to the pre-set head cutting sub-strategy;

[0015] S22, if it is determined that the cutting device is located in the middle area of ​​the long material, then the next cutting position is determined according to the pre-set middle cutting sub-strategy;

[0016] S23: If it is determined that the cutting device is located at the tail area of ​​the long material, the next cutting position is determined according to a preset tail cutting sub-strategy.

[0017] Furthermore, the head cropping sub-strategy includes:

[0018] S211, determining whether the head cutting is completed, if the head cutting is not completed, determining the next cutting position according to the preset head cutting length;

[0019] S212, determining whether head sampling is required, and if head sampling is required, determining the next cutting position according to a preset head sampling length.

[0020] Furthermore, when determining the head cutting length, the head cutting form to be adopted is judged; if it is determined that the head cutting form with a small head roll is adopted, the pre-set head small roll length is used as the head cutting length; if it is determined that the head cutting form with a waste head cut is adopted, the pre-set head cutting length is used as the head cutting length.

[0021] Furthermore,

[0022] The middle cutting sub-strategy includes:

[0023] S221, determining the front end position of the tail region of the long material, and using the front end position of the tail region as the cutting position;

[0024] S222, taking the long material from the front end position of the tail region to the previous cutting position as the cut product portion, determining the cutting positions before and after each defect in the cut product portion based on the defect position data, and determining the front and rear end positions of the continuous segment between each defect in the cut product portion;

[0025] S223, for each continuous segment between defects in the cut product portion, a genetic algorithm is used to determine a cutting position in the continuous segment between defects;

[0026] S224: Based on all the determined cutting positions in the cutting section, the cutting position closest to the previous cutting position is used as the next cutting position.

[0027] Furthermore, the specific method of determining the front end position of the tail area of ​​the long product is: determining the length of the tail area of ​​the long product, and subtracting the length of the tail area from the total length of the long product according to the length of the tail area, and the obtained value is the front end position of the tail area.

[0028] Furthermore, the length of the tail area of ​​the long material is determined by first determining the tail cutting length of the long material, and then judging whether the long material needs tail sampling. If so, the sum of the tail cutting length and the preset tail sampling length is used as the length of the tail area of ​​the long material; otherwise, the tail cutting length is used as the length of the tail area of ​​the long material.

[0029] Furthermore, when determining the tail cutting length, the tail cutting form to be adopted is judged; if it is determined that the tail cutting form of the tail small curl is adopted, the preset tail small curl length is used as the tail cutting length; if it is determined that the tail cutting form of the tail waste is adopted, the preset tail waste cutting length is used as the tail cutting length.

[0030] Furthermore, the tail trimming sub-strategy includes:

[0031] S231, determining whether tail sampling is required, and if so, determining the next cutting position according to a preset tail sampling length;

[0032] S232, the long material remaining after the last cutting position is regarded as the tail.

[0033] Furthermore, the long product is a cold-rolled steel strip, a steel pipe, a steel rail or a steel plate.

[0034] In the adaptive control method for long material cutting of the present invention, when the main control computer controls the cutting equipment to cut the long material, the main control computer re-plans the cutting position of the uncut part of the long material after each cutting by the cutting equipment, thereby obtaining the best next cutting position. In this way, dynamic planning and adjustment of the cutting position of the long material is realized during the cutting process.

[0035] Compared with the existing technology, the adaptive control method of the present invention has the following beneficial effects: the adaptive control method of the present invention realizes dynamic planning adjustment of the cutting position of long materials during the cutting process, so that it can effectively deal with external interference such as operator intervention, abnormalities of peripheral auxiliary equipment, etc., and realizes adaptation to external interference, thereby improving the cutting yield and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the shearing position of the shearing machine for cold-rolled strip steel;

[0037] Figure 2 The figure is a flow chart of the cold-rolled strip shearing adaptive control method based on the long material cutting adaptive control method of the present invention.

[0038] In the figure: 1-cold-rolled strip, 11-cut end, 12-cut tail, 13-finished product section, 14-residue, 15-defect, 16-sampling, 17-weld. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0040] The implementation background of this embodiment is the cold-rolled strip shearing operation site of a steel company. A shearing machine is set on the cold-rolled strip production line. The shearing machine is controlled by a main control computer, and the main control computer controls the shearing machine to shear the cold-rolled strip according to requirements.

[0041] See also Figure 1 The figure shows a schematic diagram of the shearing position of a cold-rolled steel strip. The dashed line in the figure indicates the shearing position of the cold-rolled steel strip 1. The cold-rolled steel strip on the production line is essentially made up of coils welded together end to end, with welds 17 connecting the previous and next coils. Each coil of cold-rolled steel strip 1 typically requires a head trimming 11 and a tail trimming 12. If required, a small section is cut off after the head trimming 11 or before the tail trimming 12 as a sample 16 for analyzing the composition and quality of the cold-rolled steel strip. Sometimes, to improve the quality of the finished coil, the head and tail trimming are performed by cutting small coils at the head and tail. After the head and tail trimming of a coil of cold-rolled steel strip 1, defects 15 are removed from the middle section. The remaining section is sheared into finished sections 13 as required. These finished sections 13 are then coiled on a coiler to form the final steel coil, which is the final product delivered to the customer. The remaining portion after the finished product section is sheared does not meet the customer's length requirements for the finished steel coil and is cut off. This portion is called the remaining material 14.

[0042] It should be noted that the "small coil" referred to in this embodiment refers to a short-sized steel coil. The length of this coil is determined by the manufacturer to facilitate shearing of specific sections of the cold-rolled strip, such as the head and tail areas where defects are concentrated. The concept of a small coil is common knowledge to those skilled in the art.

[0043] A weld detector is installed at the position of the shearing machine. When the shearing machine shears the cold-rolled strip, when the weld connecting two coils passes through the shearing machine, the weld detector will send a signal indicating that the weld has passed to the main control computer. The main control computer determines that the head end of the next coil of cold-rolled strip has arrived at the shearing machine based on the signal.

[0044] The main control computer is equipped with a first counter and a second counter (implemented in software). The first counter records the length of the cold-rolled strip passing through the shears (i.e., the distance between the leading end of the cold-rolled strip and the shears), while the second counter records the location of the last shear on the cold-rolled strip. As the shears shear the cold-rolled strip, the value of the first counter indicates the shear's position relative to the cold-rolled strip, while the value of the second counter indicates the location of the previous shear (the location of the last shear). Furthermore, the main control computer can obtain the total length of the entire coil of cold-rolled strip from the preceding process. Once the length of the cold-rolled strip passing through the shears and its total length are determined, the main control computer can calculate the distance between the trailing end of the cold-rolled strip and the shears.

[0045] It should be noted that the positions on the cold-rolled strip mentioned in this embodiment refer to the length from the head end of the cold-rolled strip.

[0046] It should be noted that, in this embodiment, the head end and front end mentioned are both ends facing the direction of advancement of the production line, and the tail end and rear end mentioned are both ends facing the direction of advancement of the production line.

[0047] See also Figure 2 This embodiment provides an adaptive control method for cold-rolled strip shearing, which realizes dynamic planning adjustment of the shearing position of the cold-rolled strip during the shearing process, thereby being able to adapt to external interference.

[0048] It should be noted that the adaptive control method of this embodiment is aimed at the shearing control of a whole roll of cold-rolled strip. That is to say, when the shearing machine completes the shearing of the previous roll of cold-rolled strip and the weld between the previous roll and the next roll of cold-rolled strip passes through the shearing machine, the adaptive control method must be reactivated to perform shearing control on the next roll of cold-rolled strip. Therefore, the cold-rolled strip mentioned in the adaptive control method is a whole roll of cold-rolled strip, and a whole roll of cold-rolled strip is in an unfolded state.

[0049] The adaptive control method of this embodiment includes:

[0050] S1, the main control computer determines that the head end of the cold-rolled strip has arrived at the shearing machine;

[0051] S2, the main control computer determines the next cutting position according to the pre-set strip cutting strategy plan;

[0052] S3, the main control computer controls the shearing machine to shear the cold-rolled strip according to the next shearing position determined in the plan;

[0053] S4, repeat S2 and S3 until all the cold-rolled strips are sheared.

[0054] The specific method for "determining whether the leading end of the cold-rolled strip has arrived at the shearing machine" in S1 is as follows: after the weld between two rolls of cold-rolled strip passes through the shearing machine, the shearing machine performs a programmed roll-changing shearing operation on the cold-rolled strip (usually manually performed by an operator). As the shearing machine shears the cold-rolled strip, the main control computer continuously compares the coil numbers of the two shearing operations to see if they are the same. If they are not, it indicates that the shearing machine has performed a roll-changing shearing operation, thereby determining that the leading end of the next roll of cold-rolled strip to be cut has arrived at the shearing machine. In other embodiments, this determination can also be made directly based on signals from a weld inspection instrument.

[0055] The pre-set strip shearing strategy in S2 includes: determining the regional position of the cold-rolled strip where the shearing machine is located;

[0056] S21, if it is determined that the shearing machine is located in the head area of ​​the cold-rolled strip, the next shearing position is determined according to a pre-set head shearing sub-strategy;

[0057] S22, if it is determined that the shearing machine is located in the middle area of ​​the cold-rolled strip, then determining the next shearing position according to a pre-set middle shearing sub-strategy;

[0058] S23: If it is determined that the shearing machine is located at the tail area of ​​the cold-rolled strip, the next shearing position is determined according to a preset tail shearing sub-strategy.

[0059] It should be noted that, when executing the strip steel shearing strategy, each time the next shearing position is obtained, the current strip steel shearing strategy is terminated.

[0060] In this embodiment, the method of "determining the location of the cold-rolled strip in the region where the shear is located" is as follows: obtaining the length of the cold-rolled strip passing through the shear from a first counter, which is referred to as the first distance value. Then, based on the first distance value, the length distance value between the tail end of the cold-rolled strip and the shear is calculated, which is referred to as the second distance value. If the first distance value is less than a preset length threshold, the shear is determined to be located in the head region of the cold-rolled strip. If the first distance value exceeds the preset length threshold and the second distance value is greater than the length value of the tail region of the cold-rolled strip, the shear is determined to be located in the middle region of the cold-rolled strip. If the second distance value is less than the length value of the tail region of the cold-rolled strip, the shear is determined to be located in the tail region of the cold-rolled strip. In this embodiment, the length threshold can be set according to actual conditions and is typically set to the head scrap length. The head scrap length is determined by specific process requirements.

[0061] It should be noted that the length of the cold-rolled strip tail region mentioned in this embodiment is determined by first determining the tail cut length of the cold-rolled strip, then determining whether tail sampling is required for the cold-rolled strip. If so, the sum of the previously determined tail cut length and the preset tail sampling length is used as the length of the cold-rolled strip tail region; otherwise, the previously determined tail cut length is used as the length of the cold-rolled strip tail region. Whether tail sampling is required is determined based on a process signal provided by a main control computer. The main control computer issues a sampling signal based on the sampling requirements in the customer contract data, and also provides the tail sampling length.

[0062] It should be noted that in this embodiment, there are two forms of tail cutting, one is tail scrap cutting, and the other is tail small coiling. Therefore, when determining the tail cutting length, it is necessary to first determine the tail cutting form to be adopted; if it is determined that the tail small coil cutting form is adopted, the pre-set tail small coil length is used as the tail cutting length; if it is determined that the tail scrap cutting form is adopted, the pre-set tail scrap cutting length is used as the tail cutting length. The specific tail cutting form adopted by the cold-rolled strip is determined according to the specific process requirements. The specific process requirements of the cold-rolled strip can be obtained through the main control computer, so that the tail cutting form can be determined. Regarding how to determine the tail cutting form to be adopted, specifically, the main control computer will give a tail cutting form signal according to the process requirements, and the tail cutting form to be adopted can be determined based on this signal. The process data such as the tail small coil length and the tail scrap cutting length are determined by the specific process requirements and are then obtained through the main control computer.

[0063] The head clipping sub-strategy includes:

[0064] S211, determining whether the cropping is completed. If the cropping is not completed, determining the next cropping position according to the preset cropping length. Specifically, the preset cropping length is directly used as the next cropping position.

[0065] The specific judgment method of "determining whether the head cutting and shearing is completed" is: obtaining the length value of the cold-rolled strip passing through the shearing machine from the first counter, and this length value is called the first distance value. If the first distance value is less than the head cutting length, it is determined that the head cutting and shearing is not completed, otherwise it is determined that the head cutting and shearing is completed.

[0066] In this embodiment, there are two types of cropping: head scrapping and head roll-off. Therefore, when determining the cropping length, it is necessary to first determine the cropping type to be used. If the head roll-off method is determined, the pre-set head roll-off length is used as the cropping length, and the cropped head is then treated as a head roll-off. If the head scrapping method is determined, the pre-set head scrapping length is used as the cropping length, and the cropped head is then treated as a head scrapping. The specific cropping type used for cold-rolled strip is determined based on the specific process requirements. The main control computer can obtain the specific process requirements of the cold-rolled strip, thereby determining the cropping type. Regarding how to determine the cropping type to be used, specifically, the main control computer will generate a cropping type signal based on the process requirements, and the cropping type can be determined based on this signal. Process data such as the head roll length and the head scrapping length are determined by the specific process requirements and then obtained by the main control computer.

[0067] S212, determine whether head sampling is required. If head sampling is required, determine the next cutting position according to the preset head sampling length. Specifically, the next cutting position is obtained by adding the preset head sampling length to the previous cutting position.

[0068] Whether head sampling is required can be determined based on the process signal from the main control computer. The main control computer will give a signal on whether sampling is required based on the sampling requirements in the customer's contract data, and will also give the head sampling length.

[0069] The middle shear sub-strategy includes:

[0070] S221, calculate and determine the front end position of the tail region of the cold-rolled steel strip, and use the "front end position of the tail region" as a shearing position. The "front end position of the tail region" is actually the "end position of the middle region".

[0071] The specific method of "calculating and determining the front end position of the tail area of ​​the cold-rolled strip" is: first determine the length of the tail area of ​​the cold-rolled strip, and then determine the front end position of the tail area based on the length of the tail area. Specifically, the total length of the cold-rolled strip is subtracted from the length of the tail area, and the resulting value can be determined as the front end position of the tail area.

[0072] S222, taking a section of cold-rolled strip from the "front end position of the tail area" to the previous shearing position as the sheared material section, and determining the shearing positions before and after each defect in the sheared material section based on the defect position data, as well as the front and rear end positions of the continuous section between each defect in the sheared material section.

[0073] S223, for each continuous segment between defects in the sheared portion, a genetic algorithm is used to determine a shearing position in the continuous segment between defects;

[0074] S224, determining the next shearing position based on all the shearing positions in the sheared portion determined in ①, ② and ③. Specifically, the shearing position closest to the "previous shearing position" among all the determined shearing positions is used as the next shearing position.

[0075] It should be noted that the inter-defect continuous section refers to a section of cold-rolled strip between two adjacent defects.

[0076] The genetic algorithm is a computational model that simulates the biological evolutionary process of natural selection and genetics, as described in Darwin's theory of evolution. It is a method for searching for optimal solutions by simulating the natural evolutionary process. This algorithm is common knowledge among those skilled in the art. The purpose of using a genetic algorithm is to ensure that the length of the cut product segments falls within the specified length range (the length range specified in the customer contract) while minimizing any remaining material after cutting.

[0077] The tail clipping sub-strategy includes:

[0078] S231, determine whether tail sampling is required. If tail sampling is required, determine the next cutting position according to the preset tail sampling length. Specifically, the preset tail sampling length is added to the previous cutting position to obtain the next cutting position.

[0079] S232, the cold-rolled strip remaining after the last shearing position (i.e. the previous shearing position) is treated as tail cutting.

[0080] In this embodiment, there are two types of tail cutting: one is tail scrapping and the other is tail small coiling. Therefore, the specific treatment of tail cutting requires first determining the final tail cutting type. If the tail cutting type is tail scrapping, the tail cutting is treated as waste. If the tail cutting type is tail small coiling, the tail cutting is taken up as a small coil by the coiler and then treated as downgraded product.

[0081] The adaptive control method for cold-rolled strip shearing of this embodiment has the advantage that, when a main control computer controls a shearing machine to shear the cold-rolled strip, after each shearing operation, the main control computer re-plans the shearing position for the unsheared portion of the cold-rolled strip, thereby determining the optimal next shearing position. This achieves dynamic planning and adjustment of the cold-rolled strip shearing position. Compared to the prior art method of "static planning before shearing and no adjustment during shearing," this method can effectively cope with external interference such as operator intervention and peripheral auxiliary equipment malfunctions, thereby achieving adaptive response to external interference, thereby improving shearing yield and enhancing work efficiency.

[0082] If the cold-rolled steel strip of this embodiment is considered a long product, the shearing machine is considered a cutting device, and the weld detector is considered a long product end detection device (used to detect the leading and trailing ends of the long product), the "adaptive control method for cold-rolled steel strip shearing" of this embodiment can be generally summarized as an "adaptive control method for long product cutting," and applied to the cutting process of other long products using other cutting devices. For example, using a flying shear to shear steel pipes, a flywheel saw to saw steel rails, and a flame cutting gun to cut long steel plates, etc., steel pipes, rails, and steel plates are long products, and the flying shears, flywheel saws, and flame cutting guns are cutting devices, thus achieving adaptive control for the cutting of various long products.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A long material cutting adaptive control method, wherein a cutting device is provided on a long material production line and the cutting device is controlled by a main control computer; Its characteristics are: The adaptive control method comprises: S1, the main control computer determines that the head end of the long material reaches the cutting device; S2, the main control computer determines the next cutting position according to the pre-set long material cutting strategy plan; S3, the main control computer controls the cutting equipment to cut the long material according to the next cutting position determined in the plan; S4, repeating S2 and S3 until all the long materials are cut; The pre-set long material cutting strategy in S2 includes: determining the area of ​​the long material where the cutting equipment is located; S21, if it is determined that the cutting device is located in the head area of ​​the long material, the next cutting position is determined according to the pre-set head cutting sub-strategy; S22, if it is determined that the cutting device is located in the middle area of ​​the long material, then the next cutting position is determined according to the pre-set middle cutting sub-strategy; S23, if it is determined that the cutting device is located at the tail area of ​​the long material, then determining the next cutting position according to the pre-set tail cutting sub-strategy; The head cutting sub-strategy needs to determine whether to sample the head, and the tail cutting sub-strategy needs to determine whether to sample the tail; The middle cutting sub-strategy includes: S221, determining the front end position of the tail region of the long material, and using the front end position of the tail region as the cutting position; S222, taking the long material from the front end position of the tail region to the previous cutting position as the cut product portion, determining the cutting positions before and after each defect in the cut product portion based on the defect position data, and determining the front and rear end positions of the continuous segment between each defect in the cut product portion; S223, for each continuous segment between defects in the cut product portion, a genetic algorithm is used to determine a cutting position in the continuous segment between defects; S224: Based on all the determined cutting positions in the cutting section, the cutting position closest to the previous cutting position is used as the next cutting position.

2. The adaptive control method for long material cutting according to claim 1, characterized in that: The head cropping sub-strategy includes: S211, determining whether the head cutting is completed, if the head cutting is not completed, determining the next cutting position according to the preset head cutting length; S212, determining whether head sampling is required, and if head sampling is required, determining the next cutting position according to a preset head sampling length.

3. The adaptive control method for long material cutting according to claim 2, characterized in that: When determining the cropping length, the cropping form to be adopted is determined; if the cropping form of the head small roll is determined to be adopted, the pre-set head small roll length is used as the cropping length; If it is determined that the head cutting method is to be adopted, the preset head cutting length is used as the head cutting length.

4. The adaptive control method for long material cutting according to claim 1, characterized in that: The specific method of determining the front end position of the tail area of ​​the long material is: determining the length of the tail area of ​​the long material, and subtracting the length of the tail area from the total length of the long material according to the length of the tail area, and the obtained value is the front end position of the tail area.

5. The adaptive control method for long material cutting according to claim 4, characterized in that: The length of the tail area of ​​the long material is determined by first determining the tail cutting length of the long material, and then judging whether the long material needs tail sampling. If so, the sum of the tail cutting length and the preset tail sampling length is used as the length of the tail area of ​​the long material; otherwise, the tail cutting length is used as the length of the tail area of ​​the long material.

6. The adaptive control method for long material cutting according to claim 5, characterized in that: When determining the tail cutting length, the tail cutting form to be adopted is judged; if it is determined that the tail cutting form is the tail small curling form, the preset tail small curl length is used as the tail cutting length; if it is determined that the tail cutting form is the tail waste cutting form, the preset tail waste cutting length is used as the tail cutting length.

7. The adaptive control method for long material cutting according to claim 1, characterized in that: The tail trimming sub-strategy includes: S231, determining whether tail sampling is required, and if so, determining the next cutting position according to a preset tail sampling length; S232, the long material remaining after the last cutting position is regarded as the tail.

8. The adaptive control method for long material cutting according to claim 1, characterized in that: The long product is a cold-rolled steel strip, a steel pipe, a steel rail or a steel plate.

Images