JP2559656B2 - Strip defect marking equipment in steel process line - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip surface defect marking apparatus in a steel process line. More specifically, by marking a defective portion on the strip surface, a defect can be surely displayed and quality assurance can be performed. The present invention relates to a surface defect marking apparatus for strips in a steel process line that can contribute to

[0002]

2. Description of the Related Art FIG. 5 is a schematic view showing an example of a conventional steel process line, for example, a recoiling line. Reference numeral 1 is a payoff reel, 2 is a pinch roll, 3 is a leveling device, 4 is a surface defect inspection device, 5 is a trimmer entry side pinch roll, 6 is a side trimmer, 7 is an inspection room, and 8 is a defect mark. -King device, 9 is an oiling device, 10 is a shank entrance side pinch roll, 11 is an exit side splitting shear, 12 is an exit side deflector pinch roll, and 13 is a tension reel.

Marking is performed in the following manner when detecting surface defects with such a recoiling line.

First, the strip A is inspected for surface defects over the entire length, and when there is a defect, a line operator usually prepares a development view in the longitudinal direction of the strip and handwrites the position of the defect, the name of the defect, etc. Mark by.

Further, as described above, the surface defect inspection apparatus 4
If there is a defect when inspecting using, the position of the defect is printed out and marked. Alternatively, the surface of the strip A is scratched and marked with a defect marking device 8, for example, a brush or a gear, and the inspection is performed by visual inspection or automatic detection in the next step.

However, in the case of marking in this manner, for example, in the case where the marking device scratches the surface of the strip to automatically mark the marking, the dust generated during the marking will not push the scratches. However, there is a problem in that it is difficult to detect automatically even in the next process.

Further, depending on the degree of damage, there is a problem such as damage to the plate passing roll in the next step.

[0008]

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned drawbacks. Specifically, since surface defects can be displayed without touching the surface of the strip, the surface of the strip can be marked during defect marking. The present invention proposes a strip surface defect marking device in a steel process line capable of reliably printing and displaying a surface defect even if the strip has oil such as rust preventive oil adhered to the surface without causing scratches.

[0009]

That is, the marking apparatus according to the present invention is a surface defect marking apparatus for a strip in a steel process line, and a surface defect inspection apparatus is provided on the inlet side of the inspection room of this process line. on the other hand,
An oil wiping device for continuously absorbing plate surface oil of the strip, a printing unit for displaying a surface defect portion on the strip, and a drying unit for drying the displayed printing are provided on the lower end side of the inspection chamber. It is characterized by

Therefore, the construction and operation of these means will be described more specifically with reference to the drawings.

First, FIGS. 1 and 2 are a front view and a plan view of a marking apparatus according to one embodiment of the present invention. In FIGS. 1 and 2, reference numeral 20 indicates a surface defect inspection apparatus. The device 20 is provided on the entrance side of the examination room of the recoiling line. Reference numeral 21 is a control unit of the surface defect inspection apparatus 20, 22 is a print control unit of a printing unit 24 that indicates that the strip is a defective portion, 23 is an oil wiping device, and the oil wiping device 23 is an inspection of a recoiling line. It is provided on the downstream side of the chamber. Reference numeral 24 is a printing unit, that is, a printing nozzle, which is attached to the oil wiping device 23, and 25 is a printing drying unit.

The oil wiping device 23 will be described in more detail with reference to FIGS. 3 and 4.

FIGS. 3 and 4 are a front view and a side view of an example of the oil wiping device. The strip A to be marked moves from the left side to the right side in FIG. Further, reference numeral 30 is a wiping roll, and the wiping member 30a is wound around the rewinding shaft 31. The wiping member 30a is made of a material such as paper or cloth that easily absorbs oil, and is wound around the rewinding shaft 31 in a coil shape. The rewinding shaft 31 is rotatably supported by a bearing 32 and is connected to a motor 34 via a shaft coupling 33 so that the wiping roll 30 can be rotated and the wiping member 30a can be fed out. Reference numeral 100 is a reduction roll, and the strip A can be pinched between the reduction roll 100 and a support roll 101 below the reduction roll 100. Reference numeral 102 denotes a cylinder, which is guided by a guide 103 so that the rolling roll 100 can be rolled down and opened.
It is configured. The reduction roll 100 is rotatably supported by a bearing portion 35, and is connected to a motor 37 via a universal joint 36 so as to be rotatable. Reference numeral 38 denotes a pinch roll rotatably supported by the bearing portion 35. The pinch roll 38 sandwiches the wiping member 30a between it and the reduction roll 100, and the wiping member 30a is smoothly fed by the rotation of the reduction roll 100. It is structured so that it can be put out. In addition, 39a, 39b, 39c and 39d are guide rollers for the wiping member.

Reference numeral 40 is a take-up shaft for the wiping member 30a. The shaft 40 is rotatably supported by a bearing 41 and is connected to a motor 43 through a shaft joint 42. Therefore, the wiping member 30a wound around the wiping roll 30 travels in the direction of the arrow through the guide rolls 39a to 39d and the reduction roll 100 to absorb the oil adhering to the strip member A. It is wound around the winding shaft 40. Reference numeral 44 is a frame, and the mounting frame 44 has a guide roller.
The guide roller 45 is attached to the rails 46a, 4
6b, and is configured to be movable in the direction perpendicular to the line. This moving mechanism is not shown, but a motor and a screw are provided.
It suffices if it is composed of such as.

In the oil wiping device constructed as described above, the reduction roll 1 is mounted on the mounting frame 44.
A printing section 24 such as a printing nozzle is provided so as to be positioned on the output side of 00, and the printing section 24 is configured to be movable together with the oil wiping device 23 in the direction perpendicular to the line.

Reference numeral 47 is a wiping piece, and it is preferable that the wiping piece 47 be attached to the bearing portion 35 in the vicinity of the reduction roll 100. In this way, the rolling roll 1
Wiping piece 4 in contact with the strip on the entry side of 00
When 7 is attached, even if a large amount of stripping oil adheres to the surface of the strip, the wiping piece 47 can remove the oil in advance, and then the wiping material 30a absorbs oil, so that the oil on the strip can be reliably absorbed. can do.

Next, the operation of the present invention will be described with reference to the mode of use of the marking device having the above-mentioned structure when inspecting the coil with oil.

When the strip A is passed through and a surface defect is detected by the surface defect inspection apparatus 20, the position of the surface defect is tracked. The tracking signal causes the oil wiping device 23 and the print controller 22 to operate.

When the surface defect portion reaches the oil wiping device portion 23, the cylinder 102 is operated, the reduction roll 100 is lowered, and the strip A with the support roll 101 is moved.
Pinch. Further, the motors 34, 37 and 43 are driven to move the wiping member 3 in the direction opposite to the traveling direction of the strip A.
Send 0a without sagging.

As a result, the plate surface oil adhering to the strip A is adsorbed by the wiping material 30a. By continuously feeding the wiping member 30a at the time of pressing, and by feeding it in the opposite direction to the strip, new wiping member 30a is always continuously fed at the time of wiping, so that oil wiping can be reliably performed. The oil-wipe strip A is passed through the outlet side. Ink 24a is sprayed from the printing unit 24 onto this portion. The strip A is further passed to the exit side, and the print drying section 25 ensures that the ink 24a
After evaporating the solvent of the above, and then applying a predetermined amount of oil on the strip by the oiling device 9, the tension reel 1
3 (see FIG. 5).

[0021]

[Examples] Strip material, temper-rolled general cold-rolled steel sheet, line speed 60 to 300 m / min, wiping material: commercially available material 60 mm in width, dull material and bright material are line threaded, and oil wiped Wiping the oil on the plate surface by the device, and immediately after that, mark the plate surface with organic solvent-based ink.
I made a king, applied oil on the outlet side and wound it up with a tension reel. The coil was rewound and visually checked to see if the ink in the marking part had disappeared. Then, the surface was wiped off lightly with a waste cloth to visually check that the marking remained on the plate surface. However, the results are shown in Table 1.

[0022]

[Table 1]

Oil-free materials such as dull and bright materials were well marked without a wiping device and did not require a wiping device. With oil-free materials, when the oil wiping device was not used, marking was poor even if the material and line speed were changed.
Good marking was obtained by using the oil wiping device according to the present invention.

In this test, an electrothermal type was used as the print drying unit 25. However, when the line speed is slow, the print drying unit is omitted by taking a natural drying space in the atmosphere. I was able to.

[0025]

As described in detail above, the marking device according to the present invention is provided with an oil wiping device, a printing unit and a drying unit on the downstream side of the inspection chamber of the process line.
Marking corresponding to defective areas on the surface is performed by the printing ink in the printing section, so there is no scratch on the strip, product defects such as pressing scratches caused by marking, and damage to the threading roll. Nor.

Further, since the marked printing is quickly dried in the drying section and surely marked, the mark does not disappear in the next step and the defective section can be easily rejected and re-inspected. And it can be automated.

Further, stable marking can be carried out regardless of the type of the threaded material such as oil-free, oil-coated, bridging material and dull material.

[Brief description of drawings]

FIG. 1 is a front view of a marking device according to an embodiment of the present invention.

2 is a plan view of the marking device shown in FIG. 1. FIG.

FIG. 3 is a front view of an example of an oil wiping device.

FIG. 4 is a side view of the oil wiping device shown in FIG.

FIG. 5 is a schematic view of a conventional recoiling line.

[Explanation of symbols]

 1 Payoff reel 2 Pin troll 3 Leveling device 4 Surface defect inspection device 7 Inspection room 8 Defect marking device 9 Oiling device 13 Tension reel 20 Surface defect inspection device 21 Surface defect inspection control unit 22 Printing control unit 23 Oil Wiping device 24 Printing unit 25 Print drying unit 30 Wiping roll 30a Wiping material 100 Rolling roll A Strip

Claims (3)

(57) [Claims] 1. A surface defect marking apparatus for a strip in a steel process line, wherein a surface defect inspection device is provided on the inlet side of the inspection chamber of this process line, while strip surface oil is provided on the lower end side of the inspection chamber. A strip surface in a steel process line, comprising: an oil wiping device that continuously absorbs, a printing unit that displays surface defects on the strip, and a drying unit that dries the displayed printing. Defect marking device. 2. In the oil wiping device, a rolling roll is arranged between a rewinding shaft and a winding shaft so as to be vertically movable.
A wiping material that absorbs the strip surface oil of the strip from the rewinding shaft is wound around the part of the reduction roll while being rewound in the direction opposite to the strip advancing direction, and is wound by the winding shaft, and the wiping 2. A strip surface defect marking apparatus in a steel process line according to claim 1, wherein said reduction roll is configured to continuously rotate in a traveling direction of the material. 3. A strip surface defect marker in a steel process line according to claim 1 or 2, wherein the printing portion is attached integrally with the oil wiping device on the downstream side of the reduction roll. King device.