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A strip head leveling method using a leveling unit

A technology for levelling machine and strip steel, applied in the direction of tail end control and contour control, which can solve the problem of difficulty in leveling the strip head, and achieve the effect of improving the yield of finished products, reducing the uneven length and universal applicability.

Active Publication Date: 2020-12-01
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the head of the strip is difficult to level, the present invention provides a method for leveling the head of the strip using a leveling unit. The specific technical scheme is as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Under the traditional leveling process, the uneven length of the strip head = the length from the center of the tempering machine to the center of the coiler + the length of the 2 coils coiled by the coiler = 13.6m + 2 × (3.14 × 0.762m) = 18.39m .

[0027] Adopt the strip steel head smoothing method disclosed in the application below, its step is as follows:

[0028] a. Put the strip steel coil into the uncoiler;

[0029] b. Pass the head of the strip through the tempering machine until it penetrates into the slitting shears;

[0030] c. Start the leveling machine and press down the leveling machine;

[0031] d. The strip steel establishes the uncoiling tension under the action of the uncoiler, the details are as follows: the steel strip between the uncoiler and the tempering machine is tightened, and the uncoiling tension is established. The uncoiling tension established here is the uncoiling established by the uncoiler when the strip steel is normally flat. 80% of ...

Embodiment 2

[0038] The difference between this embodiment and Embodiment 1 is that in step e, the set value of the bending force is controlled according to the actual feedback pressure value setting variation. The specific setting method is: a pressure sensor is installed in the bending cylinder of the tempering machine , the sensor detects the actual pressure in the oil cylinder, and then obtains the actual pressure value of the bending roll. . Using the above method to control the bending force can ensure that the strip can be threaded smoothly when the tempering machine is pressed down when the coiling tension is not established. At this time, the force on the strip is balanced and there will be no excessive bending. Bending the strip, resulting in uneven or even wrinkled strip surfaces.

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PUM

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Abstract

The invention discloses a strip steel head leveling method by using a leveling unit. The method comprises the following steps: (a) strip steel coils are placed in an uncoiling machine; (b) the head parts of strip steel penetrate through a leveling machine to insert in a slitting scissor; (c) the leveling machine is started and pressed down; (d) uncoiling tension of the strip steel is built under the effect of the uncoiling machine; (e) the leveling machine is pressed down to roll steel strips; (f) the strip steel continuously advances until the head parts of the strip steel reach a coiling machine; (g) coiling tension of the strip steel is built under the effect of the coiling machine; and (h) the strip steel is leveled. The strip steel head leveling method by using the leveling unit greatly reduces the strip steel head uneven length through modification of the process flow to improve the yield of finished products.

Description

technical field [0001] The invention relates to the technical field of steel leveling technology, in particular to a strip steel head leveling method performed by a leveling unit. Background technique [0002] The tempering unit is mainly composed of uncoiler, pinch roll and buffer roll, pinch roll, skin pass mill, slitting shear, cutting head and sample processing device, exit pinch roll, coiler, tail pinch roll, etc. . It is mainly used in the following two aspects: one is to change the elongation rate by pressing the temper machine according to the customer's requirements to eliminate the yield slip phenomenon, and solve the slip problem that occurs when the steel strip is processed such as deep drawing; the other is to pass the leveling machine The whole machine improves the surface defects of the steel coil, eliminates or repairs defects such as waves, hems, folds, roll marks, and surface iron oxides. [0003] At present, the tempering machine needs to meet the strip ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28B21B37/72
CPCB21B37/28B21B37/72
Inventor 刘海华钱京学宋继东丁美良
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD