KR101154574B1 - Apparatus for automatically inspecting defects on the surface of strip - Google Patents

Abstract

The present invention relates to a device for automatically detecting defects on the surface of a strip, and more particularly, to detect fine defects that are difficult for the operator to visually inspect during strip inspection by means of a defect automatic detection unit using an optical sensor, and the type and location of the generated defects. And automatically grind the defect site by using grindstone to display defects on the surface of the strip. The grindstones generated during grinding are collected and processed so that they do not flow from the strip or strip feed roll. The present invention relates to a device for automatically detecting defects on a strip surface that minimizes claims on product quality and maximizes productivity of work.

Strip, grindstone, automatic defect detection, foreign substance treatment

Description

Automatic detection of defects on the surface of strips {APPARATUS FOR AUTOMATICALLY INSPECTING DEFECTS ON THE SURFACE OF STRIP}

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing of the defect confirmation operation | work of the strip surface by a conventional method.

2 is a block diagram of a device for automatically detecting defects on a strip surface according to an exemplary embodiment of the present invention.

3 is a perspective view of a defect automatic detection unit according to the present invention.

Figure 4 is a perspective view of the strip surface confirmation grindstone portion and foreign matter treatment portion according to the present invention.

5 is a cross-sectional view taken along the line AA ′ of FIG. 4.

6A and 6B are explanatory diagrams of a gap generation state between a rectangular grindstone and a trapezoidal grindstone of the present invention.

7 is a cross-sectional view of the foreign matter treatment unit according to the present invention.

8 is an exploded perspective view of the foreign substance treatment unit according to the present invention.

9A to 9F are side views sequentially showing strip surface detection operations by the apparatus of the present invention.

<Description of Symbols for Main Parts of Drawings>

10; Strip 100; Fault automatic detector

110; Base 120; Fault detection optical sensor

130,140; Left and right width sensor 150,150 '; Feed screw

160,160 '; Drive motor 200; Control

300; Strip surface identification grindstones 310; Base

320; Traverse 330; Traverse cylinder

340; Grindstone frame base 350; Grinding Wheel Frame Moving Cylinder

360; Grindstone frame assembly 361; Wheel frame

362,362A, 362B; Grindstone 363; Zeolite Bracket

364; Spring 365; guide pin

366; Push sensors 367; Sensor touch bar

400; Foreign material processing unit 410; Foreign Material Collection Case

412,414; Primary and secondary exhaust pipes 416; Slope

418; Opening 420; Roll Brush

422; Motor 424; Axis of rotation

430; Plate brush 440; Eyed roll

450; Transfer belt 460,460 '; Left and Right Supports

470,470 '; Support base 480,480 '; Up / down cylinder

The present invention relates to a device for automatically detecting defects on the surface of a strip, and more particularly, to detect fine defects that are difficult for the operator to visually inspect during strip inspection by means of a defect automatic detection unit using an optical sensor, and the type and location of the generated defects. And automatically grind the defect site using grindstones to display the defects on the surface of the strip. The grindstones generated during grinding are collected and treated to prevent flow from the strip or strip feed roll. Of the present invention relates to a device for automatically detecting a defect.

In general, the strip inspection method using the grinding wheel carried out in the cold rolling process, as shown in Figure 1, the portable grinding wheel (3) in the line where the operator (1) is visually transported to find the primary defect of the surface of the strip (2) The defects are inspected by rubbing / polishing the surface of the strip 2 using the &lt; RTI ID = 0.0 &gt; At this time, if the grindstone foreign material 4 generated in the process of friction or grinding the surface of the strip 2 and the grindstone 3 is adsorbed on the strip or the lower feed roll, it causes a deform defect which is a micro defect that is difficult to see with the naked eye. There is a problem that results in deterioration of the product.

The object of the present invention devised in view of such a problem is to detect defects such as foreign matter marks, pressed marks, and roll marks generated on the surface of the strip, as well as minute defects that are difficult to visually check, such as deform defects caused by grindstone foreign matters. The present invention provides an apparatus for automatically detecting defects on a strip surface.

It is another object of the present invention to provide an apparatus for automatically detecting defects on a strip surface, which allows the grinding / polishing operation of the grindstone to be automated to more accurately and precisely inspect the defects on the strip surface.

Still another object of the present invention is to provide a device for automatically detecting defects on the surface of a strip to prevent the occurrence of deform defects caused by the grindstones by automatically removing the grindstones generated during the friction / polishing operation of the grindstones.

In order to achieve the above object, a defect detection apparatus for automatically detecting a surface of a strip according to the present invention detects a defect generated on a surface of a strip and detects information such as the position and size of the defect in comparison with a type of a defect already input. An automatic detector; A control unit which transmits an output signal when defect information of the strip surface detected by the automatic defect detecting unit is input; A plurality of grindstones connected to the control unit in a width direction, and selectively frictionally grind the grindstones corresponding to the defective parts of the strip surface among the plurality of grindstones by the output signal of the control unit to the surface of the strip. Strip surface confirmation grindstone portion that displays a defect generated on the surface; and foreign matter processing unit for collecting and discharge the grindstone foreign matter generated when the friction with the strip surface by the strip surface check grindstone portion.

The defect detecting unit has a base having a plurality of optical sensors installed in the width direction, left and right width detection sensors provided at both ends of the upper portion of the base, a transfer screw for moving the left and right width detection sensors in the width direction; It is preferable to include a drive motor for driving the transfer screw.

The strip surface check grindstone portion is provided with a base, a grindstone frame assembly having a plurality of grindstone frames provided with a grindstone, a grindstone frame base on which the grindstone frame assembly is installed, and installed on the upper left and right sides of the base. And a grindstone frame base cylinder for moving forward and backward with respect to the base, and a grindstone frame moving cylinder installed at the rear end of the plurality of grindstone frames in the grindstone frame base for individually moving the grindstone frame forward and backward. desirable.

At this time, the grindstone frame assembly is a grindstone frame is fixedly installed at the end of the grindstone frame moving cylinder, the grindstone bracket is equipped with a grindstone is installed at the tip of the grindstone frame, the spring is interposed between the grindstone frame and the grindstone bracket The spring is mounted to a guide pin, one end of which is movably inserted into the front end of the grindstone frame and the other end of which is fixed to the rear end of the grindstone bracket, and a push sensor is provided at the front end of the grindstone frame. The rear end of the grindstone bracket is preferably a sensor touch bar is installed in contact with the push sensor.

In addition, the grindstone is preferably configured such that the longitudinal cross section of the neighboring grindstone and the grindstone is alternately formed in a trapezoidal and inverted trapezoidal shape to prevent the deformation caused by the gap between the neighboring grindstone and the grindstone.

In addition, the upper portion of the base, the traversal frame base is installed in the traversal frame base moving cylinder is installed so as to be movable, the one side wall of the base is further installed a traverse moving cylinder for moving the traverse in the transverse direction desirable.

The debris treatment unit has a space for collecting the debris and a debris collection case provided with a primary discharge pipe at the rear end and a secondary discharge pipe at both sides thereof, and a grindstone debris generated by grinding the grindstone of the strip surface confirmation grindstone part. Roll-type brush for driving the conveying belt and the conveying belt for guiding the foreign matter collection case, and the grinding wheel installed in the rear end of the conveying belt to the primary discharge pipe of the foreign matter collection case; It is preferable to include a drive motor for driving the rotary shaft of the roll-shaped brush, and a plate-shaped brush is installed on the lower side of the conveying belt to remove the grindstone residue remaining on the conveying belt.

In this case, the belt driving means may include a plurality of eyed rolls on which the conveying belt is wound, a support for supporting both ends of the eyed roll, a support base for rotatably supporting the support, and the support with respect to the support base. It is preferable to include an up / down cylinder which rotates to bring the transfer belt into close contact with the surface of the strip.

Hereinafter, preferred embodiments of the present invention as described above will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 2, in the embodiment of the present invention, the defect automatic detection unit 100 that detects a defect generated on the surface of the strip and compares it with a type of a previously inputted defect is infinite. It is installed on one side of the transfer line having a track. The defect automatic detection unit 100 is connected to the control unit 200, the control unit 200 has a plurality of grindstones in the width direction of the plurality of grindstones by the output signal of the control unit 200 The grinding wheel corresponding to the defective portion generated on the surface of the strip 10 is selectively rubbed with the surface of the strip 10 so as to be connected to the strip surface identifying grind portion 300 displaying the defect occurring on the surface of the strip. The strip surface check grindstone portion 300 is provided with a foreign matter processing unit 400 for collecting and discharging the grindstone foreign matter generated when the grindstone rubs against the strip surface.

As described in detail with respect to each component of the automatic device for detecting defects on the strip surface according to the present invention configured as described above, the defect automatic detection unit 100 is as shown in FIG. A plurality of defect detection optical sensors 120 are installed at the lower end of the base 110 in the width direction, and left and right width detection sensors 130 and 140 are installed at both ends of the upper portion of the base 110. In addition, a drive motor 160 for driving the transfer screw 150, 150 'and the transfer screw 150, 150' for moving the left and right width detection sensors 130, 140 in the width direction. 160 is installed, the left and right width detecting sensor 130, 140 is installed to be guided by the upper, lower guide rods 170, 175 when moving.

As shown in FIG. 4, the strip surface check grindstone part 300 is installed on the upper portion of the base 310 so that the traverse 320 is movable in the width direction, and the base 310 is disposed on one side wall of the base 310. A traverse moving cylinder 330 for moving the traverse 320 in the width direction with respect to 310 is installed.

In addition, a grindstone frame base 340 is installed on the upper portion of the traverse 320, and is installed on the left and right sides of the base 310 to move the grindstone frame base 340 forward with respect to the base 310. The grindstone frame base 340 is installed to be movable through the grindstone frame base moving cylinder 350.

The grindstone frame base 340 is provided with a grindstone frame assembly 360 having a plurality of grindstone frames 361 on which grindstones are mounted, and at the rear end of the grindstone frames 361, the grindstone frames ( A plurality of grindstone frame moving cylinders 370 are respectively provided for moving forward and backward individually. Reference numeral 380 denotes a grindstone frame base guide, and 390 illustrates a grindstone frame base protection roll.

The grindstone frame assembly 360, as shown in Figure 5, the grindstone frame 361 is fixed to the end of the grindstone frame moving cylinder 370, the grindstone 362 at the tip of the grindstone frame 361 The grindstone bracket 363 is provided, and the spring 364 is interposed between the grindstone frame 361 and the grindstone bracket 363. At this time, one end of the spring 364 is the grindstone frame ( It is inserted into the front end of the 361 and the other end is mounted to the guide pin 365 fixed to the rear end of the grindstone bracket 363. In addition, a push sensor 366 is provided at the tip of the grindstone frame 361, and a sensor touch bar 367 is provided at the rear end of the grindstone bracket 363 corresponding to the push sensor 366. .

The grindstone 362 is formed so that the longitudinal cross-sections of neighboring grindstone 362A and the grindstone 362B alternate in trapezoidal and inverted trapezoidal shapes. That is, compared with the present invention, when the grindstone is formed in a square, as shown in FIG. 6A, the fine gap G1 generated between the grindstone S and the grindstone S 'is parallel to the direction in which the strip is transported. Since it is formed, there is a problem that the deform 10a is generated by the gap. On the contrary, when the trapezoid grindstone 362A and the inverted trapezoid grindstone 362B according to the present invention are installed adjacent to each other, as shown in FIG. 6B, the gap G2 is formed in an oblique direction with respect to the conveying direction of the strip so that the strip 10 As shown by the gap G2 at the surface of the c), the flaw overlaps in the region of the double-dot chain line, thereby preventing deform generation due to friction between the grindstone and the strip.

As shown in FIGS. 7 and 8, the foreign substance treatment unit 400 has a space in which the grindstone is collected and is provided with a primary discharge pipe 412 at a rear end thereof and a secondary discharge pipe 414 at both sides thereof. The foreign matter collection case 410 is installed on the lower side of the grindstone frame base 340 on the upper surface of the base 310. The foreign matter collection case 410 has an inclined portion 416 to guide the foreign matter to the primary discharge pipe 412 is formed on one side, the upper side is formed with an opening 418 is the inclined portion 416 At the upper end, a roll brush 420 is mounted to the rotation shaft 424 driven by the motor 422, and plate brushes 430 are installed at both sides of the opening 418.

On the upper side of the roll-shaped brush 420 and the plate-shaped brush 430, a transfer belt 450 is wound around several eyed rolls 440, and left and right supports 460 supporting both ends of the eyed rolls 440. 460 ′ is rotatably installed by the support bases 470 and 470 ′, and the up and down ends of the support belts 460 and 460 ′ closely adhere to the surface of the strip. Cylinders 480 and 480 'are provided.

The action of the automatic device for detecting defects on the strip surface according to the present invention configured as described above will be described with reference to FIGS. 9A to 9F.

As shown in Figure 9a, while the welding portion of the strip 10 to be transferred through the transfer line passes through the inspection table to detect the fatal defects, foreign marks, pressed marks, deform that are first visually confirmed by the operator. However, the fine coupling that is difficult to identify with the naked eye is a transfer screw 150 and 150 'in which the left and right width detecting sensors 130 and 140 of the defect automatic detection unit 100 are rotated to the driving motors 160 and 160'. After detecting the width of the strip 10 first by moving in and out by the defect, the defect detection optical sensor 120 to the foreign material, depressability, stamping mark or deform with a constant pitch on the surface of the strip 10 By detecting the type of defect or similar defects.

The identification output data of the defect detected by the defect automatic detection unit 100 is transmitted to the controller 200. The data transmitted is for example

Defect direction: Right (w / side), Defect length: 3140 cm, Location: Front

= 3140mm / 3.14 = 1000

⇒ It is transmitted in the form of "W / S (right) front center bladder roll foreign material mark generation."

The defect data input to the control unit 200 is transmitted to the strip surface confirmation grindstone unit 300 and the foreign matter processing unit 400. And first, as shown in Figure 9b, the drive motor 422 of the foreign matter processing unit 200 is operated so that the roll-shaped brush 420 is rotated, the up / down cylinders 480, 480 'is down, left and right support 460 460 'is inclined to one side. Therefore, the conveyance belt 450 is brought into contact with the surface of the strip 10 so that the feed belt 450 rotates while the eye roll 400 is interlocked with the strip 10 by the conveying force.

And as in Figure 9c, the strip surface confirmation grindstone portion 300 is operated. That is, the grindstone frame base moving cylinder 350 of the strip surface checking grindstone part 300 is operated so that the grindstone frame base 340 is guided to the grindstone frame base moving guide 380 and moved toward the strip 10.

Next, as illustrated in FIG. 9D, the strip 10 in which defects are generated among the plurality of grindstone frames provided in the grindstone frame base 340 by the defect data signal transmitted from the defect automatic detection unit 100 by the controller 200 is shown. The grindstone frame moving cylinder 370 of the grindstone frame corresponding to the surface of the protruding forward pushes the grindstone frame 361. Therefore, the grindstone 362 provided in the corresponding grindstone frame 361 rubs against the surface of the strip 10.

The friction operation between the grindstone and the strip surface will be described in more detail with reference to FIG. 5. In the state where the grindstone is in contact with the surface of the strip 10, the grindstone frame 361 is moved toward the grindstone bracket 363 by the force pushed by the grindstone frame moving cylinder 370, and then the sensor touch installed at the rear end of the grindstone bracket 363. When the push sensor 366 installed at the tip of the grindstone frame 361 is detected by the bar 367, the grindstone frame moving cylinder 370 is automatically stopped. From this time, the grindstone 362 rubs against the surface of the strip 10 by the minute pressure of the spring 364 interposed between the grindstone frame 361 and the grindstone bracket 363, thereby polishing the defective part of the strip surface. . The surface of the strip 10 to be polished can accurately determine the type, shape and location of the defect by the difference in color or contrast due to friction with the grindstone.

On the other hand, the grindstone foreign matter generated due to the grinding of the strip surface by the grindstone is carried by the conveying belt 450 which is rotated apart on the conveying belt 450 located on the lower side of the grindstone. Subsequently, the transported grindstone foreign material is separated from the transfer belt 450 by the roll-shaped brush 420 rotated at the rear end of the transfer belt 450 and passes through the inclined portion 416 of the foreign matter collection case 410 to discharge the primary discharge pipe ( Through 412. The grindstone foreign matter not separated from the conveyance belt 450 by the roll-shaped brush 420 is formed by a plastic plate brush 430 closely installed with the conveyance belt 450 at the lower side of the conveyance belt 450. Separated from the transfer belt 450, the separated grindstone is discharged through the secondary discharge pipe 414 through the opening 418 of the foreign matter collection case 410.

When a fine defect state such as deformation of the surface of the strip 10 by grinding of the grindstone is resolved, whether the defect state is resolved is confirmed by the defect automatic detection unit 100 and this data is fed back through the control unit 200 to FIG. 9E. As such, the grindstone frame transfer cylinder 370, which has been projected forward, is returned and the grindstone 362 is spaced apart from the surface of the strip 10. In addition, the grindstone frame base moving cylinder 350, which has moved the grindstone frame base 340 to the front, is also returned to its original position. At this time, in order to prevent the wear of the grindstones 362A and 362B formed in a trapezoidal and inverted trapezoidal shape, the traverse 320 moves the traverse 320 to the left or the right by 100 mm.

Finally, as shown in FIG. 9F, when the up / down cylinders 480 and 480 ′ of the foreign substance treatment unit 400 are raised to separate the transfer belt 450 from the surface of the strip 10, all operations are completed.

As described above, the automatic defect detection device on the surface of the strip according to the present invention can be confirmed by the automatic defect detection unit using the optical sensor to detect the minute defects that are difficult to visually check the operator during the strip inspection, foreign material mark, which is the object of the customer complaints, Imprint marks have the effect of resolving complaints, especially deform defects.

In addition, according to the present invention, it is possible to selectively draw out the grindstone according to the type, position and shape of the generated defects and polish the defects to display the defects on the surface of the strip. have.

In addition, the present invention has the advantage of fundamentally preventing the cause of the deform defects by collecting and treating the grindstone foreign matter generated during grinding grinding so as not to flow from the strip or strip feed roll.

Claims (8)

A defect automatic detection unit which detects a defect generated on the surface of the strip and detects information such as the position and size of the defect in comparison with the type of the previously inputted defect; A control unit which transmits an output signal when defect information of the strip surface detected by the automatic defect detecting unit is input; A plurality of grindstones connected to the control unit in a width direction, and selectively frictionally grind the grindstones corresponding to the defective parts of the strip surface among the plurality of grindstones by the output signal of the control unit to the surface of the strip. A strip surface identification grind portion which displays a defect generated on the surface; And a foreign material processing unit for collecting and discharging the grindstone foreign matter generated during friction with the strip surface by the strip surface checking grindstone unit. The method of claim 1, The defect automatic detection unit Drives the base having a plurality of optical sensors in the width direction, the left and right width detection sensors installed at both ends of the upper portion of the base, the transfer screw and the transfer screw for moving the left and right width detection sensors in the width direction Automatic detection device for defects on the surface of the strip, characterized in that it comprises a drive motor. The method of claim 1, The surface of the strip is confirmed A grindstone frame assembly provided with a base, and a plurality of grindstone frames provided with grindstones, a grindstone frame base on which the grindstone frame assembly is installed, and installed on left and right sides of the upper end of the grindstone frame base, A grindstone frame base cylinder for reversing, and a grindstone frame moving cylinder for each of which is installed at a rear end of the plurality of grindstone frames in the grindstone frame base to separately advance and back the grindstone frame. Fault automatic detection device. The method of claim 3, wherein The grindstone frame assembly A grindstone frame is fixedly installed at an end of the grindstone frame moving cylinder, and a grindstone bracket having a grindstone is installed at the tip of the grindstone frame, and a spring is interposed between the grindstone frame and the grindstone bracket, and the spring has one end. It is inserted into the front end of the grindstone frame and the other end is mounted to the guide pin is fixed to the rear end of the grindstone bracket, the tip of the grindstone frame is provided with a push sensor, the push end is corresponding to the back of the grindstone bracket Automatic detection device for defects on the surface of the strip, characterized in that the sensor touch bar is installed in contact with the sensor. The method according to claim 3 or 4, The grindstone is an automatic detection device for defects on the surface of the strip, characterized in that the longitudinal cross section of the neighboring grindstone and the grindstone is formed alternately in a trapezoidal and inverted trapezoidal shape to prevent the deformation caused by the gap between the neighboring grindstone and the grindstone. . The method of claim 3, wherein A traverse installed on the base of the grindstone frame base through the grindstone frame base moving cylinder is movable on an upper portion of the base, and one side wall of the base further includes a traverse moving cylinder for moving the traverse in the lateral direction. Automatic detection device for defects on the strip surface. The method of claim 1, The foreign substance treatment unit The foreign matter collection case having a space portion for collecting the foreign matter and having a primary discharge pipe at the rear end and a secondary discharge pipe at both sides thereof, and a grindstone foreign material generated by grinding the grindstone of the strip surface check grindstone part. And a roll-type brush for guiding the conveying belt and the conveying belt to a belt driving means, a rolled brush which guides and transports the grindstone foreign material which is installed at the rear end of the conveying belt to the primary discharge pipe of the foreign matter collection case. And a drive motor for driving a rotating shaft of the plate, and a plate-shaped brush installed under the transfer belt to remove the grindstone residue remaining on the transfer belt. The method of claim 7, wherein The belt driving means Several eyed rolls on which the conveying belt is wound, a support for supporting both ends of the eyed roll, a support base rotatably supporting the support, and a rotation of the support relative to the support base to the surface of the strip. Automatic detection of defects on the surface of the strip, characterized in that it comprises an up / down cylinder for close contact with the conveying belt.

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