Method for controlling automatic shearing speed of tandem cold rolling mill flying shears
A technology of shearing speed and control method, applied in shearing machine control devices, shearing devices, manufacturing tools, etc., to achieve the effect of increasing machine-hour output, improving thickness accuracy of head and tail, and reducing cost per ton of steel
Active Publication Date: 2014-10-22
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 i...
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Abstract
The invention discloses a method for controlling the automatic shearing speed of tandem cold rolling mill flying shears, and belongs to the technical field of controlling methods of the shearing speeds of cold-rolled sheets. The method is used for controlling the automatic shearing speed of cold-rolled strip steel flying shears. According to the technical scheme, the method includes the steps that when the thickness h of strip steel is smaller than or equal to 1.5 mm, the shearing speed v of the flying shears is Vcal; when the thickness h of the strip steel is larger than 1.5 mm, the shearing speed v of the flying shears is 180-280 m / min, and at the moment, the coiling speed of the strip steel cannot exceed three fifths the shearing speed of the flying shears (please see the formula in the specification). The method has the following outstanding and remarkable advantages that the automatic shearing problem of heaping steel of a tandem cold rolling mill is effectively solved, and the continuous operation stability of the tandem cold rolling mill is guaranteed; the thickness precision of the head portion and the tail portion of a tandem cold rolling mill product is improved, and the quality of cold-rolled products is improved; according to the flying shears, manual shearing is turned into automatic shearing, single coiling production time is shortened, the machine-hour yield of a tandem cold rolling mill unit is improved, and meanwhile ton steel cost is lowered.
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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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