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Shearing method of flying shears

A technology of flying shears and laser velocimeters, applied in the field of flying shears, can solve the problems of unclean cutting, excessive shearing of the head and tail of the intermediate billet, etc. big effect

Active Publication Date: 2015-12-30
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present application provides a flying shear cutting method, which solves the technical problems of excessive cutting of the head and tail of the intermediate billet and unclean cutting in the prior art

Method used

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  • Shearing method of flying shears

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Embodiment Construction

[0016] The embodiment of the present application solves the technical problems in the prior art that the cutting of the head and tail of the intermediate billet is too large and the cutting is not clean by providing a flying shear cutting method.

[0017] The technical solution in the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0018] In the shearing method of the present application, when it is detected that the steel strip is less than or equal to 10 meters away from the laser velocimeter, the outer cooling water is turned off; after the laser velocimeter detects the steel strip, the laser velocity is measured in real time through the roller table speed Judging the accuracy of the speed of the laser velocimeter, if the deviation between the speed of the laser velocimeter and the roller table is greater than 0.3m / s, switch to the speed of the roller table to track the head; calculate the deviat...

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Abstract

The invention discloses a shearing method of flying shears. The method comprises steps as follows: when the distance between band steel and a laser velocimeter is smaller than or equal to 10 m, outside cold water is closed; after the laser velocimeter detects the band steel, the accuracy of the speed of the laser velocimeter is judged in real time by means of the speed of a roller bed, and if the deviation between the speed of the laser velocimeter and the speed of the roller bed is larger than 0.3 m / s, the speed of the laser velocimeter is switched to the speed of the roller bed, and tracking of the head part is performed; the deviation coefficient between the speed of the laser velocimeter and the tail part tracking speed is calculated, and a new tail part tracking speed is acquired according to the speed of the roller bed and the deviation coefficient; an optimized shearing set value sent secondarily is used, and the shearing offset is manually increased during production. The technical problems that the head and tail parts of an intermediate slab are excessively sheared and are not completely sheared due to inaccuracy of detection by an on-site detecting element, the shearing accuracy is too low and even the band steel is wasted are effectively solved with the shearing method.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a flying shear shearing method. Background technique [0002] The incoming slab of the heating furnace is rolled into an intermediate billet through the rough rolling area. Due to the large reduction of the rough rolling, the intermediate billet becomes longer and thinner, and the head and tail of the intermediate billet are less restrained, resulting in the appearance of the head and tail of the intermediate billet. Tongue-shaped, fish-tail-shaped or other irregular shapes; at the same time, due to the large temperature drop at the head and tail, the rolling force is inaccurate; if it directly enters the finish rolling and continues rolling, it will produce unstable scrap steel rolled at the head and flick at the tail. Thereby reducing the surface quality or other more serious accidents. In order to solve this kind of problem, a cutting head and tail equipment (hereinafte...

Claims

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Application Information

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IPC IPC(8): B23D25/02
Inventor 范建鑫崔伦凯马夫明于洪喜李晓磊李杰祥赵春光
Owner BEIJING SHOUGANG CO LTD