A speed control method for automatic shearing of flying shears in tandem cold rolling mill
A technology of shear speed and control method, which is applied in the field of cold-rolled strip steel production and control, and cold-rolled plate shear speed control, to achieve the effects of increasing machine-hour output, ensuring stability, and improving the thickness accuracy of the head and tail
Active Publication Date: 2016-07-06
HEBEI IRON AND STEEL
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide an automatic shear speed control method for flying shears of a tandem cold rolling mill. With this speed control method, different flying shear speeds can be used according to different strip thicknesses to solve the problem of automatic shear stacking. Steel problems, so that the thickness accuracy of the strip head and tail can be better controlled, and at the same time increase the output of the cold tandem mill
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[0032] The figure shows, from the exploded view of the shearing process ( Figure 3 ~ Figure 7 ) to see, image 3 It is a schematic diagram of the initial cutting position of the flying shear, and the flying shear starts to start at this time; Figure 4 It is a schematic diagram of the position of the flying shear at the moment of shearing, when the cutting edge of the flying shear is in contact with the strip steel to cut the strip steel; Figure 5 It is a schematic diagram when the end face of the flying shear blade and the exit guide plate are at the same radial position. At this time, the strip head after shearing is on the arc section of the flying shear drum and the strip head is much higher than the height of the exit guide plate, but the strip steel The head does not reach the frontmost position of the outlet guide; Figure 6 It is a schematic diagram when the straight section of the flying shear drum is in the horizontal position. At this time, the strip steel is in...
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Abstract
The invention discloses a speed control method for automatic shearing of flying shears in a tandem cold rolling mill, which belongs to the technical field of shearing speed control methods for cold-rolled strips and is used for controlling the automatic shearing speed of flying shears for cold-rolled strip steel. The technical solution is: when the strip thickness h≤1.5mm, the shearing speed of flying shear v= ; When the strip steel thickness h>1.5mm, the flying shear shear speed v=180~280m / min, at this time the coiling speed of the strip steel should not exceed 0.6 times of the flying shear shear speed. The invention has the following outstanding features and remarkable effects: (1) The problem of automatic shearing of stacked steel by the flying shear of the tandem cold rolling mill is effectively solved, and the stability of continuous operation of the tandem cold rolling mill is guaranteed. (2) The thickness accuracy of the head and tail of the cold tandem rolling mill product is improved, and the quality of the cold rolled product is improved. (3) The flying shear has changed from manual shearing to automatic shearing, which shortens the production time of a single coil, improves the machine-hour output of the cold tandem rolling unit, and also reduces the cost per ton of steel.
Description
technical field [0001] The invention relates to a flying shear speed control method for automatically shearing stacked steel by flying shears of a cold tandem rolling mill, which is especially suitable for the production and control of cold-rolled strip steel, and belongs to the technical field of cold-rolled plate shear speed control methods. Background technique [0002] The flying shear is an important part of the cold tandem rolling mill. According to the instructions of the unit, the flying shear cuts the continuously rolled endless strip on-line according to the coil weight or coil diameter without stopping the machine, so as to meet the needs of the production line. The first process and the customer's cutting requirements for steel coils. In order to meet higher operating efficiency and product quality requirements, flying shears are used to cut strip steel, making continuous production of cold rolling production line more and more important. With the continuous dev...
Claims
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IPC IPC(8): B23D36/00
Inventor 史建伟谷田杨青于世川谭文振周国平李小敬郭世忠史文徐祥来刘杰王迎春
Owner HEBEI IRON AND STEEL