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Online optimal shearing method for defective steel plates

A defect and steel plate technology, applied in the field of thick plate shearing production control, can solve problems such as ineffective treatment, reduced steel plate yield, and large waste plates, so as to reduce the cost of feeding materials and increase the yield

Active Publication Date: 2017-01-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the situation in the existing technology that the defect position is far away from the head and tail of the rolled large plate. When shearing, it will not only cause the short length of the steel plate, but also produce a large number of waste plates, which cannot effectively deal with the defect and greatly reduce the steel plate. The problem of yield rate

Method used

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  • Online optimal shearing method for defective steel plates
  • Online optimal shearing method for defective steel plates
  • Online optimal shearing method for defective steel plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1, the motherboard is a sequential A-type assembly motherboard:

[0077] like Figure 8 As shown, the rolled large slab is composed of 3 sub-slabs from 100 to 300. By dividing the mother board area, 100 and 200 belong to one mother board, and 300 belongs to one mother board. It is found that the defect position is located in the 100 and 200 mother boards , query the two sub-boards in the motherboard again, find that the defect is located in the sub-board of 200, and then avoid the defect by translating the 200 sub-board, and re-divide the motherboard area. At this time, the motherboard composed of 100 and 200 is in A rough cutting point is added at the cutting head, and the tail of the 100 sub-board includes a cut-to-length cut at the cut-to-length shear, which is used to separate the defective part.

Embodiment 2

[0078] Embodiment 2, the motherboard is a split-type S-type assembly motherboard

[0079] like Figure 9 As shown, the large rolling plate is composed of 6 sub-plates from 100 to 600. By dividing the mother plate area, 100, 200, 400 and 500 belong to one mother plate, and 300 and 600 belong to one mother plate. By querying the motherboard area and defect location, it is determined that the defect is located in the motherboard of 100, 200, 400, and 500, and the four daughter boards of 100, 200, 400, and 500 in the defective motherboard are checked again, and 500 is determined to be a defective daughter board. The defect was avoided by moving the 500 sub-board, and the motherboard area was re-divided. At this time, the cutting head shears only translate the rough cutting point, and the head of the 500 sub-board adds a knife and a fixed length to the cut-to-length scissors to separate defects. part.

Embodiment 3

[0080] Embodiment 3, the motherboard is a torch-cut type G-type assembly motherboard

[0081] like Figure 10 As shown, the rolled large slab is composed of 7 sub-slabs from 100 to 700. By dividing the mother board area, 100 to 300 belong to one mother board, 400 to 500 belong to one mother board, and 600 and 700 belong to one mother board. By querying the motherboard area and defect location, it is determined that the defect is located in the motherboard of 100 to 300, and the three sub-boards of 100 to 300 in the defective motherboard are checked again, and 200 is determined to be the defective sub-board. Avoidance is carried out, and the mother board area is re-divided. At this time, the cutting head shears only translate the rough cutting point.

[0082] The optimized shearing method of the present invention effectively avoids defective parts, ensures that all the sub-plates can be successfully sheared, and reduces the cost of feeding materials. For the situation where t...

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Abstract

The invention relates to an online optimal shearing method for defective steel plates. The shearing method is characterized in that areas of a mother plate are divided, and at least one sub-plate is divided in each mother plate area, so that coordinates of a defect position on a rolling big plate are searched; edge coordinates of all the mother plate areas are inquired, so that the mother plate areas in which defects are distributed can be determined; different shearing strategies are formulated for sequence-type A group plates, partition-type S group plates and flame-cutting type G group plates; and all the defective sub-plates are avoided. In this way, the yield rate of the defective steel plates can be increased, and the feeding cost can be reduced. The method solves the problems in the prior art that the steel plate becomes shorter during shearing if the defect position is far from the head and tail of the rolling big plate; a lot of scrap plates can be generated; defects cannot be processed effectively; and the yield rate of the steel plates is greatly reduced.

Description

technical field [0001] The invention relates to the field of thick plate shearing production control, in particular to an online optimized shearing method for a steel plate with defects. Background technique [0002] In the production process of steel plates in the iron and steel industry, it is necessary to cut the basic rolling and forming large plates, and cut the rolled large plates into contract sub-slabs. Generally, domestic and foreign thick plate factories arrange planes in front of the shearing machine. Shape detection device and online ultrasonic flaw detection equipment. In the past, the shearing strategy of domestic and foreign manufacturers for rolled slabs only considered the plane shape detection data of the rolled slabs before the shearing line, and did not consider whether there are internal and external defects on the rolled slabs before shearing ( Internal cracks, shrinkage holes), the defects are generally located at the head and tail of the rolled large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D36/00
Inventor 罗劼黄福明顾豪杰苗雨川
Owner BAOSHAN IRON & STEEL CO LTD
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