JP2540145B2 - Side trimming method for strips - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a side trimming method for a strip-shaped plate material,
In particular, a side trimming method for a strip-shaped plate material, which is suitable for use in side-trimming a strip-shaped plate material having a slope, for continuously shearing the widthwise end of the running strip-shaped plate material to a predetermined plate width. Regarding the improvement of.

[Prior art]

In general, strip-shaped rolled materials such as hot-rolled steel strips and cold-rolled steel strips are produced by continuously cutting both ends of the plate material with a device (side trimmer or side trimming device) that shears the widthwise edges of the plate material. , Manufactures products with a specified width. In such a steel strip processing line (for example, continuous pickling line, pickling-tandem continuous line, continuous annealing line, etc.), steel strips having different strip widths are welded and continuously side trimmed to a predetermined strip width. In this case, if the widths of the leading plate and the trailing plate are different, it was necessary to stop the line at the weld seam. On the other hand, a side trimming device capable of changing the width without stopping the line has already been disclosed in JP-A-59-161213 and JP-B-54-15151.

[Problems to be Solved by the Invention]

On the other hand, a hot-rolled steel strip or a cold-rolled steel strip has a laterally bent portion called a kyanba. FIG. 4 shows an example of the strip-shaped plate material 10 in which the camber is generated. The plate material 10 has a lateral bending portion of 15 mm at a distance of 3 m in the longitudinal direction. Such a cavern occurs particularly unsteadily in the leading portion and the trailing portion of the steel strip, and when this portion is welded, the bending tendency of the plate largely changes before and after the joint. When side-trimming a plate material with such a camber or meandering, the center position of the material to be sheared should be adjusted to the center position of the equipment with the centering device installed on the entrance side of the side trimmer. Since there is a limit, when it exceeds the limit, the sheared part may come off from the trimmer blade of the side trimming device. Then, problems such as clogging of the scrubbing ears and detachment of the ears from the scrubbing shout occur, and the line must be stopped. Particularly, in the continuous pickling line, the pickling-tandem continuous line, and the continuous annealing line, the trouble of the trimmer led to the suspension of all lines, and the productivity thereof was remarkably reduced. As a method to deal with this problem,
2 etc., a method of simultaneously moving the trimmer main body to the working side or the driving side is disclosed, but in this method, the trimmer blade moves the strip-shaped plate material in the plate width direction due to the measuring force at the time of shearing, and the strip-shaped plate material. There was a problem of causing the meandering of.

[Object of the invention]

The present invention has been made to solve the above-mentioned conventional problems, and even if the strip-shaped plate material has a chamber portion, it is possible to perform side trimming without causing troubles such as ear clogging and ear loss. The purpose is to provide a side trimming method.

[Means for solving problems]

The present invention is a side trimming method for a strip-shaped plate material for continuously shearing the widthwise end portion of the running strip-shaped plate material to a predetermined plate width, as shown in the outline of FIG. The width of the strip after being sheared by the side trimming device is detected when the strip of strip is detected and the detected amount of chamber exceeds the centering capacity limit value of the centering device for aligning the center of the strip with the center of the side trimming device. Is changed to a narrow width direction, and when the detected camber amount is within the centering capacity limit value, the plate width after shearing is returned to the original value, thereby achieving the above object.

[Action]

The present invention, when performing side trimming of a strip-shaped plate material, when the amount of camber of the strip-shaped plate material before cutting exceeds the centering capacity limit value of the centering device, the plate width after shearing by the side trimming device is changed to the narrow width direction. The plate width after the shearing is restored when the amount of the chamber is within the centering capacity limit value. Therefore, even if the strip-shaped plate member has a chamber portion, it is possible to carry out side trimming without causing troubles such as ear plugging and ear loss. As the side trimming device, it is possible to use a side trimming device including a pair of upper and lower trimmer blades that can move in the plate width direction of the strip-shaped plate material and that can swivel in a horizontal plane. In this case, the width of the plate after shearing by the side trimming device is changed by moving the side trimming device in the plate width direction while rotating the side trimming device to continuously trim the strip-shaped plate material. It can be performed.

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. This embodiment is carried out by an apparatus as shown in FIG. This device is a side trimming device 12 provided with a pair of upper and lower trimmers (round blades) 13 that are movable in the plate width direction of the strip-shaped plate material 10 and that can swivel in a horizontal plane, and at the entrance side of the side trimming device 12. , A detector 20 and a detector 22 for detecting and calculating the chamber of the strip plate material 10
And, regardless of the meandering of the strip-shaped plate material 10 and the chamber, the centering device 24 for always aligning the center of the plate material 10 and the center of the side trimming device 12 at the shearing part by the side trimming device 12, and the side trimming from the chamber detector 20. It mainly comprises a tracking device 30 for tracking the camber position up to the device 12, and an arithmetic device 40 for comparing the correctable amount and the camber amount by the centering device 24 and determining the cutting width of the side trimming device 12. The side trimming device 12 is a trimmer housing in which a motor for rotationally driving the trimmer blade 13 is housed.
14, a turning base 15 for turning the trimmer housing 14 in a horizontal plane, a turning drive device (motor) 16 and its speed controller 17, and the turning base 15 in the width direction of the strip-shaped plate member 10. A widthwise moving device 18 for moving and a speed controller 19 therefor are provided. The centering device 24 is a side trimming device 12
The plate width center detector 25 for detecting the center position of the strip-shaped plate member 10 immediately before, and the detection result of the plate width center detector 25,
A centering controller 26 for controlling the plate width direction position of the strip plate material 10 so that the center of the strip plate material 10 is aligned with the center of the side trimming device 12, and the centering controller 26.
A guide device 27 for changing the widthwise position of the strip-shaped plate member 10 and a guide drive device 28 for driving the guide device 27 according to the output of The tracking device 30 includes a rotation detector (PLG) 3 for detecting the rotation of the roll 32 that conveys the strip-shaped plate material 10.
4 and a tracking calculator 36 for tracking the chamber generating section according to the output of the rotation detector 34. The arithmetic unit 40 is a computer for discriminating a chamber 42 for comparing the detected amount of the chamber output of the chamber 22 with a limit value of a predetermined centering ability, and the output of the computer for discriminating the chamber 42, Depending on the difference when the amount of chamber is larger than the limit value, the side trimming device 12
And a width changing controller 44 for changing the setting of the cutting width. The operation of the embodiment will be described below. The camber of the strip plate material 10 is detected by the camber detector 20, and the detected camber amount is digitized by the camber calculator 22 into the camber amount per unit length of the plate material. Further, the guide device 27 is driven according to the output of the plate width center detector 25 for detecting the center of the plate material, and the plate material center including the chamber portion is aligned with the line center. The caliber unit digitized by the calibrator computing unit 22 is compared with a predetermined limit value of the centering ability by the determinant computing unit 42 for calibrating the chamber, and when the caliber amount is larger than the limit value, the difference is determined according to the difference. Then, the width changing controller 44 gives a command to the width direction moving speed controller 17, and the setting of the cutting width by the side trimming device 12 is changed. Since the strip-shaped plate material 10 continuously flows, it is impossible to constantly change the shear width according to the fluctuation of the chamber due to the restriction of the follow-up speed. Therefore, the unit length of the plate material is determined in advance, the computing unit 42 for discriminating the chamber determines the representative shear width in this unit section, and this shear width is defined as the i-th unit section and the (i + 1) th unit section. In comparison, when it is necessary to narrow the shear width, the shear width can be changed to be narrow in the i-th section, and when it is wide, it can be widened in the (i + 1) -th section. Also, the tracking of the chamber generation part is performed by the rotation detector 34
The feed amount of the plate material 10 is detected by and is performed based on the signal of the tracking calculator 36. That is, changing the setting of the cutting width is performed by moving the width direction moving device 18 and the turning device 16 from the width changing controller 44 in response to a command from the tracking calculator 36, thereby turning the side trimming device 12 in the width direction. By moving to. Thereby, the trimming can be continuously performed without stopping the supply of the plate material. A plan view of the locus of the strip plate material 10 according to the present embodiment after shearing is shown in FIG. 3 in comparison with the conventional example. In the figure, the alternate long and short dash line A is the running path of the base material when centering is not performed, the solid line B is the path of the conventional example in which the center of the base material is reduced by the centering device 24 at the position of the side trimming device 12, and the wavy line C is 3 is a diagram showing a locus of a plate material after shearing according to the present embodiment. As is clear from the figure, the locus of the plate material after shearing indicated by the wavy line C is inside the locus of the correction of the chamber by the centering device indicated by the solid line B.
It is clear that the shearing is performed within a range not exceeding the centering ability of the centering device 24. In addition, in the example of FIG. 3, both ends of the plate width are sheared along the same locus, but it is also possible to make only one side. Further, when using the present invention in a high-speed line, in order to improve the accuracy of the chamber detection and secure the time required for changing the width,
You may need to drive at a lower speed. In such a case, one more detector is installed on the upstream side, and based on the rough detection result it is judged whether or not precise measurement is necessary. The deceleration is completed just before the detector of the
The width of the chamber part can be changed.

【The invention's effect】

As described above, according to the present invention, even when the strip-shaped plate material has a large chamber that cannot be centered, there is an excellent effect that it is possible to prevent problems such as ear clogging and ear loss at the chamber portion. In particular, continuous pickling line, pickling-tandem continuous line,
In the continuous annealing line, the trouble of the side trimming device leads to the suspension of the whole line, and the productivity is remarkably lowered. Therefore, if this is prevented by the present invention, it immediately leads to the productivity improvement and the cost reduction, and the economic The effect is extremely large. In the experiment by the inventor, when the cold-rolled steel sheet is trimmed by the conventional method of centering the material to be sheared, it is about 10
Although the problem of ear clogging or deafening occurred about 0 times / month (about 3% with respect to the treated coil), the present invention was able to eliminate this problem altogether.

[Brief description of drawings]

FIG. 1 is a flow chart showing the gist of the side trimming method for a strip-shaped plate material according to the present invention, and FIG. FIG. 3 is a diagram showing a comparison of shearing trajectories in the conventional example and the embodiment of the present invention, and FIG. 4 is a plan view showing an example of a belt-shaped plate member. 10 …… Band-shaped plate material, 12 …… Side trimming device, 13 …… Trimer blade, 20 …… Kanba detector, 24 …… Centering device, 40 …… Computing device, 42 …… Compiler for discriminating, 44 …… Width change controller.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 62-130116 (JP, A) JP 62-203714 (JP, A) JP 61-257709 (JP, A) JP 61- 30313 (JP, A)

Claims (1)

(57) [Claims] 1. A method for side trimming a strip plate material for continuously shearing an end portion in the width direction of the strip plate material during traveling to a predetermined strip width, and detecting and detecting a chamber of the strip plate material before cutting. When the amount of squeeze exceeds the centering capacity limit value of the centering device for aligning the center of the strip-shaped plate with the center of the side trimming device, the plate width after shearing by the side trimming device is changed to the narrow width direction, and detection is performed. A side trimming method for a strip-shaped plate material, wherein the plate width after shearing is restored when the amount of the chamber is within the centering capacity limit value.