Special thick plate sampling method

Abstract

The invention relates to the technical field of steel plate machining. The special thick plate sampling method comprises the following steps: dividing a to-be-sampled steel plate into a first sub-plate and a second sub-plate; establishing a database, storing the steel plate specification information into the database, and changing a first sub-plate head sampling plan of the to-be-sampled steel plate into a second sub-plate head sampling plan at a detection equipment system L3; optimizing a crop shear calculation model, adding intermediate sampling logic, and controlling and distributing the sampling position of the steel plate; optimizing a fixed-length shear calculation model, adding a sampling part and position detection judgment of a second daughter board, and controlling relative execution of shearing operation; and generating and filing steel plate sampling actual performance. The method has the beneficial effects that the middle part of the steel plate can be sampled and detected, the shearing efficiency of the fixed-length shear is improved, the sampling frequency of the same steel plate is reduced, the sampling position of the head of the second steel plate does not need to be manually adjusted, the production efficiency of a shearing line is improved, and consumption and waste of steel resources are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steel plate processing, and in particular to a special sampling method for thick plates. Background Art

[0002] When producing external supply pipeline steel, according to the requirements of the main production plan, the production target thickness needs to be controlled at less than or equal to 25mm, and the sampling position needs to be controlled at the head of the second mother plate in the rolled large plate. At the same time, due to the unstable thickness of the sample at the head of the steel plate, the thickness of the sample cut at the head of the steel plate during the production process is lower than the standard requirement, which requires the inspection personnel to repeatedly confirm the overall thickness of the steel plate, resulting in relatively low inspection efficiency.

[0003] According to the conventional use of the shear line model in a thick plate plant, there are currently only five sampling modes, which are as follows: 1. Sampling of rolled plates can be divided into the following three sampling methods: 1) Sampling the header of the first daughter board of the motherboard; 2) Sampling the tail of the last daughter board of the motherboard; 3) Sample the head of the first daughter board of the motherboard and the tail of the last daughter board.

[0004] 2. Natural sheet sampling, which can be divided into the following three sampling methods: 1) Sampling the head of each sub-board; 2) Sampling at the tail of each sub-board; 3) Sample the head of the first sub-board and the tail of each other sub-board. If there is only one sub-board, sample the head and tail of the sub-board.

[0005] 3. Unit sampling of heat-treated motherboard: The sampling length is allocated for the cropping shear, and no sampling is performed for the fixed-length shear.

[0006] 4. Unit sampling of heat-treated motherboard and natural sheet sampling coexist.

[0007] 5. Sampling of rolled plates and sampling of natural sheets coexist.

[0008] Based on the above five sampling modes, the relatively common ones are rolling plate sampling and natural sheet sampling, and the remaining sampling modes are less used; among them, the three sampling methods of rolling plate sampling can only sample and test the head and tail of the mother plate, and cannot sample and test the middle part of the mother plate, and the detection accuracy is relatively low; natural sheet sampling is aimed at high-specification and high-requirement steel plates, and each sub-plate of the mother plate is sampled and tested, which will definitely affect the shearing efficiency of the cut-to-length shear, and then affect the production efficiency of the shearing line; the five sampling modes currently available on the comprehensive shearing line can be mainly divided into the following two situations: one is that the shearing efficiency is high, but the detection accuracy of the sampling part is low, and the other is that the sampling times are many, the detection accuracy is high, but the shearing efficiency is low, and multiple sampling will cause waste of resources; and under the current circumstances, it is impossible to realize automated shearing operations, and the operator needs to make manual adjustments according to production requirements, and manually adjust the sampling position to the head of the second mother plate, which is not only prone to sampling errors, but also leads to reduced operating efficiency. Summary of the invention

[0009] The object of the present invention is to provide a special thick plate sampling method which can realize sampling and testing of the middle part of the steel plate.

[0010] In order to achieve the above object, the present invention adopts the following technical solution: A special sampling method for thick plates comprises the following steps: Step 1: Obtain a steel plate to be sampled, and divide the steel plate to be sampled into a first sub-plate and a second sub-plate; Step 2: Place the steel plate to be sampled on a roller and move it. When the steel plate to be sampled enters the detection equipment area L3, establish a database, store the specification information of the steel plate to be sampled in the database, and pre-generate a sampling adjustment plan for the steel plate to be sampled. The sampling adjustment plan is to change the first sub-plate head sampling in the steel plate to be sampled into the second sub-plate head sampling; Step 3: When the steel plate to be sampled enters the cropping shear equipment area L2, the calculation model of the cropping shear is started, the sampling position of the head of the first sub-plate is detected, and the sampling length is set to confirm whether the steel plate to be sampled performs intermediate sampling. If yes, the sampling part of the head of the first sub-plate is allocated to the second sub-plate, and then the cropping shear is controlled to perform segmented shearing of the steel plate to be sampled. If not, the allocation of the sampling part is not adjusted, and the calculation is performed according to the normal logic to control the cropping shear to perform segmented shearing of the steel plate to be sampled. Step 4: When the steel plate to be sampled enters the cut-to-length shearing equipment area L1, the calculation model of the cut-to-length shearing is started to detect and determine whether the sampling part is located at the head of the first sub-plate. If so, the calculation is performed according to normal logic to control the cut-to-length shearing to shear at the head of the first sub-plate. If not, when it is detected that the second sub-plate has reached the cut-to-length shearing position, the head of the second sub-plate is sampled and sheared first, and then the cut-to-length shearing is performed; Step 5: Send the sampling results of the steel plate to be sampled to the detection equipment area L3, complete the sampling of the current steel plate, and prepare for the sampling of the next steel plate.

[0011] Furthermore, in the step 1, the steel plate to be sampled is a non-single-length rolled steel plate.

[0012] Furthermore, in the step 1, the length of the first sub-board is 1000 mm, and the length of the second sub-board is 2000 mm.

[0013] Furthermore, in the step three, when it is confirmed that the current steel plate does not perform intermediate sampling, the specification information of the steel plate to be sampled in the database is deleted.

[0014] Furthermore, in the step five, it is confirmed whether the current steel plate is an intermediate sample. If so, the sampling result is marked with an intermediate sample and sent to the detection equipment area L3.

[0015] The beneficial effects of the present invention are as follows: the present method can realize sampling and testing of the middle part of the steel plate, improve the shearing efficiency of the cut-to-length shear, reduce the number of sampling times for the same steel plate, and eliminate the need to manually adjust the sampling position of the head of the second steel plate, thereby improving the production efficiency of the shearing line and reducing the consumption and waste of steel resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of a special thick plate sampling method of the present invention.

[0017] Figure 2 Schematic diagram of the intermediate sampling position of a steel plate provided according to an embodiment of the present invention.

[0018] Figure numerals: 1. steel plate to be sampled; 2. first sub-plate; 3. second sub-plate; 4. sampling part. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, a special thick plate sampling method includes the following steps: Step 1: obtain a steel plate 1 to be sampled, and divide the steel plate 1 to be sampled into a first sub-plate 2 and a second sub-plate 3; Step 2: Place the steel plate 1 to be sampled on a roller and move it. When the steel plate 1 to be sampled enters the detection equipment area L3, establish a database, store the specification information of the steel plate to be sampled in the database, and pre-generate a sampling adjustment plan for the steel plate 1 to be sampled. The sampling adjustment plan is to change the first sub-plate 2 head sampling in the steel plate 1 to be sampled into the second sub-plate 3 head sampling; Step 3: When the steel plate 1 to be sampled enters the cropping shear equipment area L2, the calculation model of the cropping shear is started, the sampling position of the head of the first sub-plate 2 is detected, and the sampling length is set to confirm whether the steel plate 1 to be sampled performs intermediate sampling. If yes, the sampling part 4 of the head of the first sub-plate 2 is allocated to the second sub-plate 3, and then the cropping shear is controlled to perform segmented shearing of the steel plate 1 to be sampled. If not, the allocation of the sampling part 4 is not adjusted, and the calculation is performed according to the normal logic to control the cropping shear to perform segmented shearing of the steel plate 1 to be sampled; Step 4: When the steel plate 1 to be sampled enters the cut-to-length equipment area L1, the calculation model of the cut-to-length shear is started to detect whether the sampling part 4 is located at the head of the first sub-plate 2. If yes, the calculation is performed according to normal logic to control the cut-to-length shear to shear at the head of the first sub-plate 2. If not, when it is detected that the second sub-plate 3 reaches the cut-to-length position, the head of the second sub-plate 3 is sampled and sheared first, and then the cut-to-length shear is performed; Step 5: Send the sampling results of the steel plate 1 to be sampled to the detection equipment area L3, complete the sampling of the current steel plate, and prepare for the sampling of the next steel plate.

[0021] Furthermore, in the step 1, the steel plate 1 to be sampled is a non-single-length rolled steel plate.

[0022] Furthermore, in the step 1, the length of the first sub-board 2 is 1000 mm, and the length of the second sub-board 3 is 2000 mm.

[0023] Furthermore, in the step three, when it is confirmed that the current steel plate does not perform intermediate sampling, the specification information of the steel plate 1 to be sampled in the database is deleted.

[0024] Furthermore, in the step five, it is confirmed whether the current steel plate is an intermediate sample. If so, the sampling result is marked with an intermediate sample and sent to the detection equipment area L3.

[0025] It should be noted that, based on the allocation operation of the sampling part 4 at the head of the first sub-board 2 to the second sub-board 3 in step three, it can be ensured that the sampling length of the second sub-board 3 is increased when it is cut by the head shear, and it can be ensured that the second sub-board 3 will not be short when it is cut by the fixed-length shear.

[0026] It should be understood that in order to ensure stable and clear directional sampling detection in the detection equipment area L3, during the head sampling detection, it is indicated that the head of the first sub-board 2 and the head of the second sub-board 3 are in a relative state, and the sampling position is quickly input and controlled.

[0027] The method can realize sampling and testing of the middle part of the steel plate, improve the shearing efficiency of the cut-to-length shear, reduce the number of sampling times for the same steel plate, and eliminate the need to manually adjust the sampling position of the head of the second steel plate, thereby improving the production efficiency of the shearing line and reducing the consumption and waste of steel resources.

Claims

1. A special sampling method for thick plates, characterized in that: The following steps are involved: Step 1: Obtain a steel plate to be sampled, and divide the steel plate to be sampled into a first sub-plate and a second sub-plate; Step 2: Place the steel plate to be sampled on a roller and move it. When the steel plate to be sampled enters the detection equipment area L3, establish a database, store the specification information of the steel plate to be sampled in the database, and pre-generate a sampling adjustment plan for the steel plate to be sampled. The sampling adjustment plan is to change the first sub-plate head sampling in the steel plate to be sampled into the second sub-plate head sampling; Step 3: When the steel plate to be sampled enters the cropping shear equipment area L2, the calculation model of the cropping shear is started, the sampling position of the head of the first sub-plate is detected, and the sampling length is set to confirm whether the steel plate to be sampled performs intermediate sampling. If yes, the sampling part of the head of the first sub-plate is allocated to the second sub-plate, and then the cropping shear is controlled to perform segmented shearing of the steel plate to be sampled. If not, the allocation of the sampling part is not adjusted, and the calculation is performed according to the normal logic to control the cropping shear to perform segmented shearing of the steel plate to be sampled. Step 4: When the steel plate to be sampled enters the cut-to-length shearing equipment area L1, the calculation model of the cut-to-length shearing is started to detect and determine whether the sampling part is located at the head of the first sub-plate. If so, the calculation is performed according to normal logic to control the cut-to-length shearing to shear at the head of the first sub-plate. If not, when it is detected that the second sub-plate has reached the cut-to-length shearing position, the head of the second sub-plate is sampled and sheared first, and then the cut-to-length shearing is performed; Step 5: Send the sampling results of the steel plate to be sampled to the detection equipment area L3, complete the sampling of the current steel plate, and prepare for the sampling of the next steel plate.

2. The special thick plate sampling method according to claim 1 is characterized in that: In the step 1, the steel plate to be sampled is a non-single-length rolled steel plate.

3. The special thick plate sampling method according to claim 1 or 2, characterized in that: In the step 1, the length of the first sub-board is 1000 mm, and the length of the second sub-board is 2000 mm.

4. The special thick plate sampling method according to claim 1 is characterized in that: In the step three, when it is confirmed that the current steel plate does not perform intermediate sampling, the specification information of the steel plate to be sampled in the database is deleted.

5. The special thick plate sampling method according to claim 1 or 4, characterized in that: In the step 5, it is confirmed whether the current steel plate is an intermediate sample. If so, the sampling result is marked with an intermediate sample and sent to the detection equipment area L3.

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