Dynamic distribution method for shearing plan of circle shear

Abstract

According to the dynamic allocation method for the shearing plan of the circle shears disclosed by the invention, real-time shearing abrasion loss monitoring is respectively established for each circle shear aiming at a plurality of circle shears running in parallel, and dynamic adaptive plan allocation is carried out on to-be-sheared strip steel according to a monitoring result. According to the dynamic allocation method for the shearing plan of the circle shear, on one hand, the abrasion loss can be monitored in real time so as to establish dynamic adaptive regulation and control on the to-be-sheared strip steel; on the other hand, the circle shear can be replaced in time according to monitoring.

Description

Technical Field

[0001] The present invention belongs to the field of metallurgical production, and particularly relates to a dynamic allocation method for the shearing plan of a circular shear. Background Art

[0002] Existing products to be sheared have various specifications such as multiple thicknesses, multiple grades, and tapping marks. Therefore, frequent on-site cross-logistics situations occur. As a result, the original batch production mode of switching from thick materials to thin materials has been updated to a cross-logistics mode because it cannot meet the current logistics requirements. In order to adapt to high-frequency material switching, the parameters of the circular shear in the finishing unit also need to be frequently adjusted according to the incoming material thickness, grade, tapping mark, etc.

[0003] If the parameters of the circular shear in the finishing unit are adjusted improperly, the phenomenon of circular shear tool breakage and poor edge trimming, namely edge burrs and excessive burrs, are likely to occur during the edge trimming process. Such edge trimming defects will directly affect the use of the final user and require the finishing unit to rework.

[0004] The invention application with the application number CN 200510046494.8 discloses "a pickling and edge trimming control method for extra-low carbon mild steel", which transmits the edge trimming parameters of the horizontal clearance value and vertical clearance value of the circular shear to the first-level PLC, adjusts the motor to reach the control position through the PLC, and the edge trimming parameter values of the horizontal clearance value and vertical clearance value of the circular shear sent to the first-level PLC are calculated by a process computer through a mathematical model linearly related to the raw material thickness.

[0005] The invention application with the application number: CN 202110872580.3 discloses "a circular shear parameter integration control system and method", which discloses a circular shear parameter integration control system, control method, medium, and data processing terminal. The expert system includes a human-computer interaction interface, knowledge acquisition, knowledge base, inference engine, interpreter, and comprehensive database; the control system includes a PLC system, driver, motor, and rangefinder; the execution system includes a transmission device.

[0006] The invention application with the application number: CN 202210384674.0 discloses "a circular shear shearing quality detection and feedback control system and method thereof". The monitoring system monitors the cross-section of the sheared strip in real time and uploads the cross-section information as data input to the expert system. The expert system makes a decision on the process parameter adjustment amount according to the feedback information, and the control system adjusts the parameters of the circular shear; the detection system monitors the shearing situation of the strip in real time and adjusts the side clearance in real time; the adjustment amount information of the circular shear parameters is transmitted to the expert system, and the expert system performs self-learning. Summary of the Invention

[0007] The object of the present invention is to provide a solution that can dynamically optimize the shearing plan according to the real-time wear amount of the circular shear; on the one hand, it can monitor the wear amount in real time to establish a dynamic adaptive control for the strip steel to be sheared; on the other hand, it can establish a timely replacement for the circular shear.

[0008] To achieve the above technical objectives, the present invention provides a method for dynamically allocating the shearing plan of a circular shear, and its technical solution is specifically as follows:

[0009] A method for dynamically allocating the shearing plan of a circular shear,

[0010] For multiple circular shears running in parallel, real-time monitoring of the shearing wear amount is established for each circular shear, and a dynamic adaptive plan allocation is performed on the strip steel to be sheared according to the monitoring results.

[0011] Furthermore,

[0012] Real-time monitoring of the shearing wear amount of each circular shear is used to establish a monitoring representation of the real-time side clearance of each circular shear; based on this, the dynamic adaptive plan allocation for the strip steel to be sheared includes the following steps:

[0013] S1: Perform linear fitting analysis based on the historical side clearance data of the circular shear to obtain a relationship model between the side clearance and the shearing tonnage, and input it into the data module of L2;

[0014] S2: Establish real-time monitoring of the running length of the strip steel according to the running speed and time of the strip steel, and accordingly complete real-time monitoring of the shearing tonnage of each circular shear;

[0015] S3: Calculate the current side clearance of each circular shear at a set period, and perform dynamic plan allocation on the strip steel to be sheared according to the calculation results.

[0016] Furthermore,

[0017] The linear fitting analysis based on the historical side clearance data of the circular shear in step S1 to obtain a relationship model between the side clearance and the shearing tonnage is completed by first dividing the historical data into data sets according to three situations: edge wear, blunt wear, and severe wear, and then performing separate linear fittings on the data belonging to edge wear and blunt wear.

[0018] Furthermore,

[0019] The division of edge wear, blunt wear, and severe wear is completed according to the cumulative shearing tonnage.

[0020] Furthermore,

[0021] The section before the cumulative shearing tonnage falls into the interval [149, 151]T is set as edge wear,

[0022] The section with the cumulative shear tonnage falling into the interval (151, 300] T is set as blunt wear,

[0023] The cumulative shear tonnage greater than 300 T is set as severe wear.

[0024] A dynamic allocation method for the shearing plan of a circular shear according to the present invention can, on the one hand, monitor the wear amount in real time to establish dynamic adaptive regulation for the strip steel to be sheared; on the other hand, it can establish timely replacement of the circular shear according to the monitoring. Brief Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the implementation steps of the present invention. Detailed Embodiment

[0026] Next, a dynamic allocation method for the shearing plan of a circular shear according to the present invention will be further specifically described.

[0027] In order to be able to master the real-time wear conditions of the tools of each circular shear in real time, so as to obtain the actual accurate working range of the side clearance, and thus make a dynamic plan arrangement for the strip steel to be sheared according to the real-time actual working range, the present technical solution provides a dynamic allocation method for the shearing plan of a circular shear. Its working principle and process are specifically as follows:

[0028] Working Principle:

[0029] Allocating different side clearances according to different shearing thicknesses is a prior art, but this allocation mechanism is completed on the basis of regarding the circular shear as a shear without wear, without considering the problem of the mismatch of the working ability of the side clearance itself caused by the shear wear of the circular shear itself, thus bringing a series of shearing effect problems due to the mismatch between the actual side clearance and the theoretical side clearance.

[0030] In order to first master the real-time working range of the side clearance of the circular shear itself, the present technical solution provides a solution that can respectively establish real-time monitoring of the shear wear amount of each circular shear, and make a dynamic adaptive plan allocation for the strip steel to be sheared through the monitoring. The establishment of real-time monitoring of the shear wear amount of each circular shear here is realized by establishing real-time monitoring of the side clearance of the circular shear based on the fact that the increase in the wear amount is equivalent to the decrease in the side clearance. Based on this, the dynamic adaptive plan allocation for the strip steel to be sheared includes the following steps:

[0031] S1: Based on the historical side clearance data of the circular shear, perform linear fitting analysis to obtain the relationship model between the side clearance and the shearing tonnage, and input it into the data module of L2. Specifically: First, divide the historical data into data sets according to three situations: edge wear, blunt wear, and severe wear. Then, perform separate linear fittings on the data belonging to edge wear and blunt wear. The division of edge wear, blunt wear, and severe wear is based on the cumulative shearing tonnage. The section before the cumulative shearing tonnage falls into the interval [149, 151]T is set as edge wear, the section where the cumulative shearing tonnage falls into the interval (151, 300]T is set as blunt wear, and the cumulative shearing tonnage greater than 300T is set as severe wear to complete.

[0032] S2: Establish real-time monitoring of the strip running length according to the speed and time of the strip running, and accordingly complete the real-time monitoring of the shearing tonnage of each circular shear.

[0033] S3: Calculate the current side clearance of each circular shear according to the set period, and perform dynamic plan allocation on the strip to be sheared according to the calculation results.

[0034] The real-time monitoring of the strip running length according to the speed and time of the strip running in S2 above, and accordingly completing the real-time monitoring of the shearing tonnage of each circular shear is as follows:

[0035] W = V×t1×W it1 +V×t2×W it2 +...+V×t n ×W itn ,

[0036] In the above formula,

[0037] W: The cumulative shearing tonnage until the moment of tn, unit: T;

[0038] V: The strip running speed, unit: m / s;

[0039] t1, t2, t n : The shearing time period, unit: S;

[0040] W it1 : The weight per meter of the sheared steel of the i-th thickness within the t1 time period, unit: kg / m;

[0041] W it2 : The weight per meter of the sheared steel of the i-th thickness within the t2 time period, unit: kg / m;

[0042] W itn : The weight per meter of the sheared steel of the i-th thickness within the tn time period, unit: kg / m;

[0043] i: The number of thickness types of the steel to be sheared. When i takes different values, it represents the sheared steel with corresponding different thicknesses.

[0044] Working process:

[0045] The specific work involves the process control machine L2, the circular shear, and the position signal sensor installed at the entrance of the circular shear.

[0046] When the position signal sensor detects the strip steel, it notifies L2. At the same time, L2 sets the current moment in the calculation module as the starting moment of calculation. The calculation module completes the real-time calculation and monitoring of the shearing length based on the product of the running time and the running speed of the strip steel. Also, when the thickness of the sheared steel type changes, the moment of change and the corresponding thickness specifications are recorded.

[0047] According to the set calculation period, the calculation module first completes the calculation of the corresponding cumulative shearing tonnage based on the cumulative shearing length corresponding to the calculation moment and the different shearing thicknesses in this period; then calls the relationship model between the side clearance and the shearing tonnage to complete the calculation of the theoretical side clearance of the circular shear at the current moment, and obtains the working range of the side clearance of the current circular shear. For the actual working range of the side clearance of the current circular shear, combined with the set side clearances of the sheared steel with different thicknesses, a dynamic shearing plan is set. When it is monitored that it belongs to the edge wear period, the real-time calculation of the side clearance is carried out according to the fitting equation of the edge wear period; when it is monitored that it belongs to the blunt edge period, the real-time calculation of the side clearance is carried out according to the fitting equation of the blunt edge wear period; when it is monitored that the circular shear reaches the severe wear period, a reminder message is sent on the man-machine interface.

Claims

1. A dynamic allocation method for the circular shear cutting plan, characterized in that: For multiple circular shears operating in tandem, real-time monitoring of the shear wear amount is established for each circular shear, and dynamic adaptive plan allocation is performed on the strip to be sheared according to the monitoring results.

2. The dynamic allocation method for the circular shear cutting plan according to claim 1, characterized in that: The real-time monitoring of the shear wear amount of each circular shear is used to establish a monitoring representation of the real-time side clearance of each circular shear; the dynamic adaptive plan allocation for the strip to be sheared accordingly includes the following steps: S1: Perform linear fitting analysis based on the historical side clearance data of the circular shear to obtain the relationship model between the side clearance and the shear tonnage, and input it into the data module of L2. S2: Establish real-time monitoring of the running length of the strip according to the running speed and time of the strip, and accordingly complete the real-time monitoring of the shear tonnage of each circular shear. S3: Calculate the current side clearance of each circular shear at a set period, and perform dynamic plan allocation on the strip to be sheared according to the calculation results.

3. The dynamic allocation method for the circular shear cutting plan according to claim 2, characterized in that: The linear fitting analysis based on the historical side clearance data of the circular shear in step S1 to obtain the relationship model between the side clearance and the shear tonnage is completed by first dividing the historical data into data sets according to three situations: edge wear, blunt wear, and severe wear, and then performing separate linear fitting on the data belonging to edge wear and blunt wear.

4. The dynamic allocation method for the circular shear cutting plan according to claim 3, characterized in that: The division of edge wear, blunt wear, and severe wear is completed according to the cumulative shear tonnage.

5. The dynamic allocation method for the circular shear cutting plan according to claim 4, characterized in that: The section before the cumulative shear tonnage falls into the interval [149, 151]T is set as edge wear. The section where the cumulative shear tonnage falls into the interval (151, 300]T is set as blunt wear. The cumulative shear tonnage greater than 300T is set as severe wear.

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