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Sizing cutting device for thick plate continuous casting machine and method for improving sizing accuracy

A technology of fixed-length cutting and continuous casting machine, which is applied in the field of iron and steel metallurgy, can solve the problems of decreased weighing accuracy and uncertain weight of cast slabs, and achieves the effect of reducing fluctuation and improving the accuracy of fixed-length.

Active Publication Date: 2019-05-03
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long-term use of the slab roller table weighing device will cause the phenomenon that the weighing accuracy will decrease, and the weight of the slab weighed is not necessarily accurate.

Method used

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  • Sizing cutting device for thick plate continuous casting machine and method for improving sizing accuracy
  • Sizing cutting device for thick plate continuous casting machine and method for improving sizing accuracy
  • Sizing cutting device for thick plate continuous casting machine and method for improving sizing accuracy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A method for improving sizing accuracy, comprising the steps of:

[0059] (a) Use the device described in Embodiment 1 to cut the casting slab 6 to a fixed length, so that the distance between the pressing rod ram 41 and the casting slab 6 is kept constant, so that the pressing rod ram 41 can move from receiving the pressing signal to The time difference for compacting the strand 6 remains constant.

[0060] Specifically, the distance between the pneumatic cylinder 1 and the cutting trolley 3 can be adjusted by adjusting the height of the pad 2, and the height h of the pad 2 1 With slab thickness h 2 The difference between them is a fixed value a, and pads 2 of different heights are used for slabs 6 of thickness (200-300) mm, so that the distance between the pressing head 41 of the compression rod and the slab 6 remains constant. That is to say, a taller spacer 2 is used for the thick casting slab 6 to increase the height of the air cylinder 1, and the height of the p...

Embodiment 2

[0070] Such as Figure 1-7 Shown is the cut-to-length cutting device for a thick plate continuous casting machine shown in this embodiment, including a flame cutting trolley 3 and a track 32 for the longitudinal movement of the flame cutting trolley 3, and the flame cutting trolley 3 is moved and assembled on the track 32. The flame cutting trolley 3 is provided with a crossbeam spanning the cast slab, and the center of the crossbeam is provided with a pressing device, and the pressing device includes a pneumatic cylinder 1, a pressing rod 4 connected to the bottom of the pneumatic cylinder 1, and a pressing head of the pressing rod 41. The pneumatic cylinder 1 is connected with the flame cutting trolley 3 through the pad 2, the pneumatic cylinder 1 is connected with the compression rod head 41 through the compression rod 4, and the pneumatic cylinder 1 can drive the compression rod 4 to move up and down; One end of the pressing head of the pressing rod is connected to the fla...

example

[0088] Such as Figure 1 to Figure 7 As shown, using the method described in Example 1 and the device described in Example 2, for the casting slabs 6 with thicknesses of 200mm, 250mm, and 300mm, spacers 2 with heights of 150mm, 200mm, and 250mm were used respectively, so that the compression rod pressed The distance between the head 41 and the slab 6 is kept constant. Before the pre-compression, the distance between the thicker steel plate 42 at the lower part of the compression rod head and the casting slab is 210mm. After the pre-compaction, the distance between the compression rod pressure head The distance between the thicker steel plate 42 at the bottom and the slab is 30mm.

[0089] The cut-to-length system used in this example is provided by Shanghai Xinzhong Metallurgical Equipment Factory, and the product model is BGB. The thickness of the compression rod pressing head 41 is 10mm.

[0090] The angle between the upper plane of the compression rod pressing head 41 and...

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Abstract

The invention provides a sizing cutting device for a thick plate continuous casting machine and a method for improving the sizing accuracy. The method includes the following steps: (a) for casting blanks with different thicknesses, the time of a pressing head of a pressing rod of the continuous casting machine from receiving a pressing signal to pressing the casting blanks are the same; (b) the actual position of a flame cutting trolley is corrected by adopting a laser positioning method, and thus the positioning error of the flame cutting trolley is controlled to be within 2 mm; (c) a gun body of a flame cutting gun is protected, and the gun body is prevented from deforming after being heated; (d) according to weighing results returned by a casting blank weighing system, a cutting sizingcorrection value is dynamically corrected; and (e) a rollertable weighing system is checked for 1-2 times a day, and a roller table correction system is corrected, so that the weighing accuracy of a roller table is improved. According to the sizing cutting device for the thick plate continuous casting machine and the method for improving the sizing accuracy, the fluctuation of the sizing accuracyof the casting blanks with the different thicknesses is effectively reduced, the sizing length accuracy of the casting blanks with the different thicknesses can be the same, and the sizing accuracy ofthe casting blanks with the different thicknesses can be improved stably.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular, the invention relates to a length-cutting device for a thick plate continuous casting machine and a method for improving the precision of length-setting. Background technique [0002] Billet cut-to-length technology is the technology of cutting the continuous and uninterrupted billet to length online, and it is the last indispensable process of continuous casting production. [0003] The currently announced technologies for improving the accuracy of sizing are to detect the distance between the end of the slab and the flame cutting trolley through devices such as infrared rays, encoders, and laser rays. If the distance is equal to the sizing distance, online flame cutting is performed. However, these technologies have not taken into account the impact of the time error between the flame cutting car receiving the cutting signal and the actual start of cutting on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/126B22D11/16
CPCY02P70/10
Inventor 刘洪银陈永生郭伟达陈显著高岩姜晓艳赵立峰
Owner SHANDONG IRON & STEEL CO LTD
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