JP2010190642A - Defect marker, defect marking processing line, method of marking defect, and method of manufactiring defect-marked coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a defect marker for forming indentations easy to check by visual inspection independently of the existence or non-existence of rustproof oil or of defect detection performance on the fabricator side as to a processing line for winding up an aluminum sheet into a coil, a method of defect marking, and a defect-marked coil. <P>SOLUTION: An indentation device 5a constituting the defect marker 5 includes a cylindrical part 8a, a roller 8 consisting of a plurality of projections 8b formed along an outer peripheral surface thereof, bearings 9 rotatably supporting the roller 8, a cylinder 10 supporting the bearings 9, and a speed controller 11 controlling a driving speed for the cylinder 10. Based on an indication of a defect detector, the cylinder 10 is driven downward, and causes the roller 8 to press the aluminum sheet while rotating, forming the indentations of 5-50 mμ in depth with respect to defective parts. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a defect marking apparatus, a defect marking processing line, a defect marking method, and a defect marking for marking a surface defect of an aluminum plate in a processing line for winding an aluminum or aluminum alloy (hereinafter referred to as aluminum) plate around a coil. The present invention relates to a method for manufacturing a coil.

  In general, an aluminum plate material is subjected to hot rolling on a slab that has been cast, chamfered and homogenized, and then cold-rolled, annealed, and refined as necessary (for example, a straightening process to make a smooth flat surface) , Slitting to the width of the appropriate product, cutting to the proper length, etc.), and cans and beverages can be manufactured in the form of coils or sheets, automobile manufacturers, foil rolling manufacturers, printing plate manufacturers Shipped to processing manufacturers such as electrical component manufacturers.

  These processing manufacturers often use easy-to-use aluminum sheets (hereinafter referred to as “sheets”) at the beginning of the use of aluminum plate materials, but as usage increases, lower-cost aluminum coils (hereinafter referred to as “sheets”) are used. Tend to use a coil). In recent years, coils are materials for cans, materials for printing plates (PS plates), materials for foils, materials for automobile panels (especially outer materials), housings for DVDs and PCs, materials for DVDs and CD chassis for car stereos and car navigation systems. However, in such a field, even a fine wrinkle may cause a fatal defect in the function of the final product.

  For this reason, as described in Patent Document 1, not only aluminum plate materials but also metal plate material production lines are conventionally inspected for the presence or absence of defective portions over the entire length and width of a coil with a CCD camera or the like. A step of removing the portion is provided. However, when such a method is used in the coil manufacturing process, there arises a problem that the individual weights of the coils become uneven by removing the defective portion. Therefore, at present, a method is used in which a manufacturer makes a marking on a defective portion in advance and delivers a marked coil, and then the processing manufacturer removes the defective portion according to the marking.

  For example, Patent Document 2 discloses a hooked part marking device that ejects ink to a hooked part detected by a wrinkle detection apparatus, and Patent Document 3 discloses ink to a surface wrinkle detected by a surface defect meter. A method of marking with a soaked felt is disclosed. Further, Patent Document 4 discloses a marking device that can perform markings perpendicular to the steel plate surface, and Patent Document 5 describes a stamp that can be stamped with a marking that can be reliably read by an optical reader. A type marking device is disclosed.

Japanese Patent Laid-Open No. 5-30709 (paragraphs 0029 to 0038, FIG. 1) JP-A-4-291138 (paragraphs 0009 to 0013, FIG. 1) Japanese Patent Laid-Open No. 2001-188046 (paragraphs 0037 to 0048, FIG. 3) Japanese Patent Laid-Open No. 8-90065 (paragraphs 0010 to 0013, FIG. 1) JP 2002-42072 A (paragraphs 0015 to 0016, FIG. 1)

  However, the above method and apparatus have the following problems. That is, the aluminum material is softer than the steel material and has a higher coefficient of thermal expansion and thermal conductivity, and therefore surface defects such as wrinkles are more likely to occur than other materials. Therefore, the treatment line is provided with a process to apply rust-preventive oil to the aluminum plate to prevent surface defects, and at present, a highly volatile oil type is used as the rust-preventive oil to reduce the cost required for degreasing. is doing.

  Therefore, in the ink marking methods as described in Patent Documents 2 and 3, problems such as ink bleeding, discoloration, alteration, disappearance, etc., or drying due to the application of highly volatile antirust oil. There may be a problem that a normal portion is removed due to transfer of no ink, or a coil including a defective portion proceeds to the next step as it is due to disappearance of ink. Further, in the ink marking method, if a defective part is overlooked at the press stage in the processing manufacturer, there is a problem that it is impossible to find the marking (defective part) at the stage of the finished painted product.

  In addition, if it is the marking marking system currently disclosed by patent documents 4, 5, the above problems due to rust prevention oil will not occur. However, since the conventional engraving device uses a non-rotatable embossing pen, it is difficult to follow the speed of the plate material conveyed at 50 to 100 m / min, even if the speed can be followed. It was very difficult to calculate the time required from defect detection to stamping and to accurately stamp the defect. Furthermore, since aluminum plate material is soft, it can penetrate the plate material by stamping, or the stamping device slides with anti-rust oil and cannot be stamped normally. Various problems, such as overlooking part.

  The present invention has been made in view of such problems, and it is easy to visually check the defective portion of the aluminum plate regardless of the presence or absence of rust preventive oil in the processing line and the defect detection performance on the processing manufacturer side. It is an object of the present invention to provide a defect marking device, a defect marking processing line, a defect marking method, and a defect-marked coil that can detect and remove a defective portion with certainty by forming an indentation that can be confirmed.

  In order to solve the above problems, in a processing line for winding an aluminum plate conveyed by a conveyance roll into a coil, a defect marking device for forming an indentation in a defective portion detected by a defect detection device, wherein the defect marking device is A roller comprising a cylindrical portion and a plurality of protrusions formed along the outer peripheral surface of the cylindrical portion, a bearing that rotatably supports the roller, a bearing that supports the bearing, and that contacts the aluminum plate A vertical mechanism that drives in a contacting direction; and a driven roll that supports the aluminum plate below the vertical mechanism, and the aluminum plate on the driven roll by the roller based on an instruction from the defect detection device And an indentation having a depth of 5 to 50 μm is formed on the defective portion of the aluminum plate.

  A defect marking device having such a configuration may press an aluminum plate while rotating a roller based on an instruction from the defect detection device to form an indentation composed of a plurality of recesses on the defective portion of the aluminum plate. it can.

  The invention according to claim 2 is characterized in that the plurality of protrusions have a columnar shape with a cross-sectional diameter of 0.5 to 5 mm.

  The defect marking device having such a configuration is a columnar shape that is easy to visually check against a defective portion of the aluminum plate by pressing the aluminum plate while rotating the roller based on an instruction from the defect detection device. Can be formed.

  According to a third aspect of the present invention, the driven roll is formed of a urethane material or a rubber material, and the plurality of protrusions have a curvature with a protrusion formed at the center in the width direction of the roller as a vertex. It is provided at regular intervals, and the radius of curvature is in the range of 500 to 2000 mm.

  The defect marking device having such a configuration presses the aluminum plate without distorting, even when the driven roll arranged under the indentation device is made of a flexible material such as urethane material or rubber material, An indentation having a uniform depth can be formed in the width direction.

  The invention according to claim 4 is characterized in that the defect marking device forms an indentation group having a length of 200 to 600 mm with respect to a defect portion of the aluminum plate.

  The defect marking device having such a configuration presses the aluminum plate while rotating the roller based on an instruction from the defect detection device, and forms a plurality of indentation groups within a certain range with respect to the defective portion of the aluminum plate. can do.

  According to a fifth aspect of the present invention, the vertical mechanism includes a flow rate control valve that controls a driving speed of the vertical mechanism by adjusting a discharge amount of the fluid in a discharge path through which an internal fluid is discharged. The flow control valve is characterized in that the drive speed of the vertical mechanism is reduced by adjusting the opening degree of the discharge path within a range of 15 to 60%.

  The defect marking device having such a configuration is to adjust the opening of the flow control valve to limit the flow rate of the fluid in the vertical mechanism, thereby decelerating the lowering speed of the vertical mechanism, and the roller of the indentation device is made of aluminum. Slowly contact the plate.

  The invention according to claim 6 is a defect marking processing line for forming an indentation group on a defect portion of an aluminum plate flowing on a conveying roll and winding it on a coil, and detecting the defect portion on the surface of the aluminum plate. In accordance with an instruction from the apparatus, a rust preventive oil application apparatus for applying rust preventive oil to the surface of the aluminum plate, and an instruction from the defect detection device, the aluminum plate is pressed against the defective portion of the aluminum plate. And a defect marking device for forming an indentation having a depth of 5 to 50 μm.

  The defect marking processing line having such a configuration presses the aluminum plate while rotating the roller based on an instruction from the defect detection device, and forms indentations including a plurality of recesses on the defective portion of the aluminum plate. be able to.

  The invention according to claim 7 is characterized in that the indentation device is arranged after the rust preventive oil application device.

  The defect marking processing line having such a configuration is based on an instruction from the defect detection device, pressing while rotating an aluminum plate coated with rust preventive oil on the surface in advance, against the defective portion of the aluminum plate, Indentation groups can be formed.

  The invention according to claim 8 is a defect marking method for forming an indentation group in a defective portion in a processing line for winding an aluminum plate flowing on a transport roll around a coil, and a defect detection device is used to detect the surface of the aluminum plate. A detection step for detecting a defective portion, an oil application step for applying anti-rust oil to the surface of the aluminum plate by an anti-rust oil application device, and a roller based on an instruction from the defect detection device. An indentation step of pressing the aluminum plate with an indentation device to form an indentation having a depth of 5 to 50 μm with respect to the defective portion of the aluminum plate.

  A defect marking method having such a configuration is a depth that allows easy confirmation of visual inspection of defective portions of an aluminum plate by rotating and pressing an aluminum plate coated with rust preventive oil based on an instruction from a defect detection device. An indentation can be formed.

  The invention according to claim 9 is a method of manufacturing a coil on which a defect marking is made in a processing line for winding an aluminum plate flowing on a transport roll around a coil, and a defect portion on the surface of the aluminum plate is detected by a defect detection device. Indentation device provided with a roller based on a detection step for detecting rust, an oil application step for applying antirust oil to the surface of the aluminum plate by an antirust oil application device, and an instruction from the defect detection device Pressing the aluminum plate to form an indentation having a depth of 5 to 50 μm with respect to the defective portion of the aluminum plate, and a winding step in which the aluminum plate that has undergone the indentation step is used as a winding coil. It is characterized by having.

  The manufacturing method of the coil with the defect marking having such a configuration is based on the instruction of the defect detection device, by rotating and pressing the aluminum plate coated with rust preventive oil, and visually checking the defective portion of the aluminum plate. An indentation having a depth that can be easily confirmed can be formed.

  According to the defect marking device of the first aspect, even if the aluminum plate is pre-coated with highly volatile rust preventive oil, an indentation can be reliably formed on the defective portion. Therefore, a defective part can be removed reliably and it can prevent that the product containing a defective part distribute | circulates to a market. Further, since no ink or paint is used for the marking, a separate facility for drying the marking is not required, and improvement in work efficiency and cost reduction can be realized.

  According to the defect marking device according to claim 2, since the tip of the protrusion is formed with a plane having a size that can be easily visually confirmed, when the rust preventive oil is applied to the aluminum plate, Even when the processing line is at a high speed, an indentation that can be reliably confirmed visually can be formed on the defective portion.

  According to the defect marking device of the third aspect, the aluminum plate is distorted even when the driven roll disposed below the indentation device is formed of a flexible material such as a urethane material or a rubber material. In addition, it is possible to visually confirm the defect portion, and to form an indentation having a uniform depth in the width direction and the length direction.

  According to the defect marking device according to claim 4, by forming the indentation group having a width that can be sufficiently visually confirmed on the surface of the aluminum plate, the defect portion can be reliably removed, and the defect portion is included. The product can be prevented from circulating in the market.

  According to the defect marking device of the fifth aspect, the impact when the roller of the indentation device first comes into contact with the aluminum plate can be reduced, and a uniform and normal indentation can be formed on the defective portion of the aluminum plate. .

  According to the defect marking processing line according to claim 6, by forming an indentation on the defective portion of the aluminum plate, the defective portion can be reliably removed, and a product including the defective portion is prevented from being distributed to the market. can do. Further, since no ink or paint is used for the marking, a separate facility for drying the marking is not required, and improvement in work efficiency and cost reduction can be realized.

  According to the defect marking processing line of the seventh aspect, even if the aluminum plate is pre-coated with a highly volatile rust preventive oil, an indentation can be reliably formed on the defective portion. Therefore, a defective part can be removed more reliably and it can prevent that the product containing a defective part distribute | circulates to a market.

  According to the defect marking method of the eighth aspect, even with an aluminum plate pre-coated with highly volatile rust preventive oil, marking with a depth that is easy to visually confirm can be reliably applied. . Therefore, a defective part can be removed reliably and it can prevent that the product containing a defective part distribute | circulates to a market. Further, since no ink or paint is used for the marking, a separate facility for drying the marking is not required, and improvement in work efficiency and cost reduction can be realized.

  According to the method for manufacturing a coil with a defect marking according to claim 9, even if it is an aluminum plate pre-coated with a highly volatile rust preventive oil, a marking with a depth that is easy to visually confirm is provided. Can be applied reliably. Therefore, the coil which can remove a defect part reliably can be manufactured. Further, since no ink or paint is used for the marking, a separate facility for drying the marking is not required, and improvement in work efficiency and cost reduction can be realized.

It is an arrangement plan of the principal equipment in a processing line which winds aluminum plate 1a used for explanation of the present invention to coil 1b. It is a whole perspective view which shows the structure of the impression apparatus 5a which concerns on this invention. It is a whole perspective view which shows the structure of the roller 8 which concerns on this invention. It is a top view explaining the impression group 13 formed in the aluminum plate 1a by the impression apparatus 5a which concerns on this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, the processing line for winding the aluminum plate 1a around the coil 1b is a defect comprising a defect detection device 2, a control unit 3, a rust preventive oil coating device 4, an indentation device 5a and a driven roll 5b. It comprises a marking device 5, a transport roll 6, and a tension reel 7. Further, it is preferable that the processing line is arranged in the order of the rust preventive oil coating device 4 and the indentation device 5a after the defect detection device 2 is located upstream.

  The aluminum plate 1a is manufactured by subjecting an aluminum (alloy) slab to hot rolling or the like. The aluminum plate 1a is conveyed from the upstream side to the downstream side of the processing line by the conveying roll 6 and wound around the coil 1b. . The plate thickness of the aluminum plate 1a is preferably in the range of 0.2 to 16 mm. By setting the plate thickness within the range, a more uniform and normal indent can be formed.

  The defect detection device 2 constantly monitors whether there are defect parts such as wrinkles on both the front and back surfaces of the aluminum plate 1a, and when the defect part is detected, information such as the defect position and size is included in the control unit 3. A defect detection signal is transmitted. The defect detection device 2 is constituted by, for example, a CCD camera.

  The control unit 3 is built in the defect detection device 2 and controls the operation of the indentation device 5a. The control unit 3 calculates the timing of the indentation and the time of the indentation from information on the position, size and range of the defective part, information on the conveyance speed of the aluminum plate 1a, and the like, and transmits the information to the indentation device 5a. To give marking instructions.

  The rust preventive oil application device 4 applies rust preventive oil to the aluminum plate 1a. By applying anti-rust oil to the aluminum plate 1a, it is possible to prevent wrinkles formed during transportation, transportation, and the like, and to suppress burrs and abrasion powder when forming indentations.

  The indentation device 5a forms an indentation by pressing the aluminum plate 1a sent from the upstream of the processing line based on an instruction from the control unit 3, and the defect marking device 5 according to the present invention together with the driven roll 5b. It constitutes. Here, the indentation device 5a is preferably disposed downstream of the rust preventive oil coating device 4 in the processing line. By arranging the rust preventive oil application device 4 and the indentation device 5 in this order, it is possible to suppress burrs and wear powder when forming the indentation, and to cause the burr and wear powder. It is possible to prevent the occurrence of surface defects on the aluminum plate. The detailed configuration and operation of the indentation device 5a will be described later.

  The driven roll 5b is disposed under the indentation device 5a and constitutes the defect marking device 5 according to the present invention together with the indentation device 5a. The driven roll 5b is made of a flexible material such as a urethane material or a rubber material, and is driven by the indentation device 5a. By using such a material for the driven roll 5b, it is possible to safely transport an aluminum material that is softer and easier to scratch than steel materials and the like without being scratched.

  The transport roll 6 is for transporting the aluminum plate 1a, and a plurality of transport rolls 6 are disposed along the processing line. The transport roll 6 includes a rotation determination unit 6a, and is driven to rotate at a predetermined speed by an operation of the rotation determination unit 6a using a motor or the like (not shown) as a drive source to transport the aluminum plate 1a from upstream to downstream. The rotation determining means 6 a of the transport roll 6 transmits a transport speed signal that is information related to the transport speed of the aluminum plate 1 a to the control unit 3.

  The tension reel 7 is for winding the aluminum plate 1a flowing through the processing line, and is arranged at the most downstream side of the processing line. The tension reel 7 is rotationally driven using a motor or the like (not shown) as a drive source, thereby winding the aluminum plate 1a around the coil 1b on the most downstream side. The rotation determining means 6 a may be provided not on the transport roll 6 but on the tension reel 7, and may be configured to transmit information regarding the rotation speed of the tension reel 7 to the control unit 3.

  Next, the detailed configuration and operation of the indentation device 5a will be described in detail. 2 and 3, the indentation device 5 a includes a roller 8, a bearing 9, and a cylinder 10.

  The roller 8 is for pressing the aluminum plate 1a while rotating while following the conveying speed of the processing line. The roller 8 is composed of a cylindrical portion 8 a formed in a hollow cylindrical shape and a protrusion 8 b formed along the outer peripheral surface of the cylindrical portion 8 a, and is rotatably supported by a bearing 9. Here, the roller 8 is preferably configured without providing a drive source such as a motor so as to easily follow the conveying speed of the aluminum plate 1a. Moreover, it is preferable that the cylindrical part 8a and the protrusion part 8b which comprise the roller 8 are integrally formed with materials, such as iron and titanium.

  The protrusion 8b is for forming indentations including a plurality of recesses when the roller 8 presses the aluminum plate 1a. It is preferable that a plurality of protrusions 8b are formed in the axial (width) direction and the circumferential direction so as to protrude substantially vertically on the outer peripheral surface of the cylindrical portion 8a. Further, the interval and quantity of each of the protrusions 8b can be appropriately changed according to the size of the cylindrical part 8a and the desired indentation range.

  The protrusion 8b is preferably formed in a columnar shape with a cross-sectional diameter of 0.5 to 5 mm. This is because if the protrusion 8b is formed with a curvature or inclination such as a hemisphere, a pyramid, or a cone, the roller 8 slides on the surface of the aluminum plate 1a due to rust prevention oil. This is because it may be impossible to form an indentation. Therefore, indentation can be reliably formed regardless of the presence or absence of rust preventive oil by forming in a columnar shape so that the tip of the protrusion 8b becomes a flat surface in this way. In addition, it is preferable to form the protrusion part 8b, for example by column shape, prismatic shape, or these combination.

  The size of the protrusion 8b is preferably within a range of 0.5 to 5 mm in diameter when formed in a columnar shape and 0.5 to 5 mm per side when formed in a prismatic shape. If the diameter of the protrusion 8b and the length of one side are 0.5 mm or less, the area of the indentation may be too small to be visually confirmed. This is because the area is too large and may adversely affect other normal surfaces. In addition, in order to form an indentation having a depth that can be easily visually confirmed, the height of the protrusion 8b is preferably 0.1 to 5 mm.

  The plurality of protrusions 8b formed on the cylindrical portion 8a has a curvature within a range of 500 to 2000 mm with the protrusion 8b formed at the center in the width direction of the cylindrical portion 8a as a vertex. It is preferable to provide a difference in the height position of the tip. This is because, when the heights of the tips of the protrusions 8b are aligned, when the driven roll 5b is formed of a flexible material such as a urethane material or a rubber material, the aluminum plate 1a is distorted when pressed, the width and This is because indentations having a uniform depth in the length direction may not be formed.

  Here, if the radius of curvature of the protrusion 8b is less than 500 mm, the indentation at the center in the width direction of the aluminum plate 1a is formed deeper than both width ends. Conversely, if the radius of curvature exceeds 2000 mm, the width of the aluminum plate 1a. Indentations at both ends are formed deeper than the center in the width direction. Accordingly, the radius of curvature is preferably within the above range. The radius of curvature is more preferably 700 to 900 mm.

  The bearing 9 supports the roller 8 rotatably from both sides. The bearing 9 is composed of, for example, a ball bearing and is supported by the cylinder 10.

  The cylinder 10 is a mechanism that reciprocates up and down by the pressure of a fluid sealed inside. Specifically, a fluid (for example, air) is sealed inside the cylinder 10, and the fluid is driven up and down by pressing a piston (not shown). Along with this, a roller 8 provided at one end of the cylinder 10 presses the aluminum plate 1a while rotating to form an indentation. The cylinder 10 is configured by, for example, a pneumatic type.

  The pressure at which the indentation is formed depends on the shape of the protrusion 8b, but is preferably in the range of 0.2 to 0.5 MPa. For example, in the case of a prismatic roller having a side length of 1 mm, the pressure is preferably about 0.4 MPa. By setting the pressure within the above range, it is possible to form an indentation having a depth that can be easily visually confirmed.

  The indentation device 5a is preferably provided with a speed controller 11 as shown in FIG. The speed controller 11 adjusts the flow rate of the fluid sealed in the cylinder 10 to control the driving speed of the cylinder 10 and functions as a flow rate control valve (speed control valve).

  The speed controller 11 is attached to a fluid discharge path (not shown) provided in the cylinder 10, and controls the flow rate of the fluid in the cylinder 10 by adjusting the opening of the discharge path, thereby driving the cylinder 10. Can be controlled. That is, the drive speed of the cylinder 10 can be reduced by adjusting the opening degree of the speed controller 11 to 100% or less. The speed controller 11 is controlled by manually adjusting the opening degree in advance, and the speed controller 11 transmits an opening degree signal that is information about the opening degree to the control unit 3.

  The speed controller 11 preferably has an opening when the cylinder 10 descends within a range of 15 to 60%. This is because, when the cylinder 10 is lowered at the original speed, the impact when the roller 8 comes into contact with the aluminum plate 1a is large, the indentation at the start of the indentation is deeply formed, and the uniform depth in the width and length directions. This is because the indentation of the thickness may not be formed.

  Here, if the opening degree when descending is less than 15%, the descending speed of the cylinder 10 is too slow, so the roller 8 may bounce when contacting the aluminum plate 1a conveyed at high speed, and conversely opens. If the degree exceeds 60%, the descending speed of the cylinder 10 is too fast, and the indentation at the start of the indentation may become too deep to form an indentation with a uniform depth. Therefore, the opening is preferably within the above range. The opening degree is more preferably 25 to 50%.

  Even when the indentation device 5 a does not use the speed controller 11, it is possible to reduce the descending speed of the cylinder 10 by limiting the flow rate of the fluid in the cylinder 10. However, by using the speed controller 11 as described above, the descending speed of the cylinder 10 can be controlled more easily and finely. Further, it is not necessary to control the rising speed of the cylinder 10 in particular.

  Next, the indentation group 13 formed by the indentation device 5a will be described in detail. First, the depth of the indentation group 13 is preferably formed within a range of 5 to 50 μm. By setting the depth of the indentation group 13 within the range, it is possible to form the indentation group 13 that can surely be visually confirmed on the defective portion of the aluminum plate.

  As shown in FIG. 4, the indentation device 5a forms an indentation group 13 having a length including the defect portion 12 in the width direction on the aluminum plate 1a regardless of the position of the defect portion 12 in the aluminum plate 1a. It is preferable. The indentation group 13 is preferably formed at the center in the width direction of the aluminum plate 1a. However, the indentation group 13 may not be at the center in the width direction as long as it is formed to have a length that always includes the defect portion 12.

  By regulating the length of the indentation group 13 in this way, control for marking according to the position of the defective portion 12 (following the defective portion 12) becomes unnecessary. Therefore, even when the conveying speed of the processing line is further increased, the indentation group 13 can be formed following the speed.

  Moreover, it is preferable that the indentation apparatus 5a forms the indentation group 13 on the aluminum plate 1a at a timing such that the defect portion 12 is positioned at the center position in the length direction of the indentation group 13 here. Further, as shown in FIG. 4, when a plurality of defect portions 12 are present in the aluminum plate 1 a, the defect portion 12 present closest to the center in the width direction of the aluminum plate 1 a among the plurality of defect portions 12 is the indentation group. It is preferable to form the indentation group 13 on the aluminum plate 1a at a timing such that the indentation group 13 is positioned at the center position in the length direction.

  By forming the indentation group 13 in this way, it is possible to easily confirm visually where the defect portion 12 is located. Therefore, the defective part 12 of the aluminum plate 1a can be removed reliably, and the product including the defective part 12 can be prevented from being distributed to the market.

  The indentation group 13 is preferably formed within a length range of 200 to 600 mm with the defect portion 12 as the center. If the length of the indentation group 13 is less than the above range, visual confirmation becomes difficult. Conversely, if the length exceeds the above range, adverse effects such as wrinkles on other normal surfaces may occur. It is. The indentation group 13 is further preferably formed with a total length of 400 mm, 200 mm in the front and back, with the defective portion 12 at the center. Moreover, it is preferable to form the width | variety of the indentation group 13 within the range of 20-100 mm centering on the defect part 12. FIG.

  In addition, it is preferable to form the indentation group 13 on the aluminum plate 1a on which rust preventive oil has been applied in advance by the rust preventive oil application apparatus 4, as shown in FIG. Thereby, the burr | flash and abrasion powder at the time of forming an indentation can be suppressed, and the generation | occurrence | production of the surface defect of the aluminum plate resulting from the said burr | flash and abrasion powder can also be prevented.

  The indentation group 13 is specifically formed by the following procedure. First, the control unit 3 receives a defect detection signal from the defect detection device 2, a conveyance speed signal from the rotation determination unit 6 a of the conveyance roll 6, and an opening degree signal from the speed controller 11. Here, as described above, the defect detection signal is information related to the position, size, and range of the defective portion 12, the transport speed signal is information related to the transport speed of the aluminum plate 1a, and the opening signal is related to the opening of the speed controller 11. Each contains information.

  The control unit 3 calculates the time for forming the indentation group 13 from the position, size, and range (defect detection signal) of the defect unit 12. Further, the timing for forming the indentation group 13 is calculated from the conveyance speed (conveyance speed signal) of the aluminum plate 1a and the descending speed of the cylinder 10 derived from the opening degree (opening degree signal) of the speed controller 11, and these information are calculated. Is transmitted to the indentation device 5a. Then, the indentation device 5a presses the aluminum plate 1a at the time instructed by the control unit 3 and forms the indentation group 13 so that the defect portion 12 is located at the center position in the length direction.

  As mentioned above, although the form for implementing this invention has been described, embodiment other than the above can be changed suitably. For example, the processing line can be changed to a configuration in which the rust preventive oil application device 4 is not provided, or a configuration in which the rust preventive oil application device 4 is provided downstream of the indentation device 5a. If it is the defect marking apparatus 5 which concerns on this invention, even if it is a case where rust preventive oil is not applied beforehand, an indentation can be formed uniformly and normally with respect to the aluminum plate 1a.

  Further, the indentation device 5a can be configured by arranging a plurality of rollers 8 in the width direction. By arranging a plurality of rollers 8 side by side, the width of the indentation group 13 can be increased, and visual confirmation of the indentation is further facilitated. Further, the indentation device 5a has a cylindrical portion 8a itself having a so-called via barrel shape so that the protrusion 8b formed at the center in the width direction of the roller 8 has a vertex within a range of 500 to 2000 mm. It can also be configured.

  Moreover, the cylinder 10 can also be comprised by a hydraulic type. Unlike air, which is compressible, oil is non-compressible, so it has better driving efficiency than a pneumatic type and can constitute a high-power vertical mechanism. Moreover, in the form for implementing this invention, although the case where the defect marking apparatus 5 was applied to the aluminum plate material was described, it can apply not only to an aluminum plate material but to a copper plate and a steel plate.

  Examples in which the effects of the present invention have been confirmed will be specifically described below in comparison with comparative examples that do not satisfy the requirements of the present invention. In addition, this invention is not limited only to this Example.

  Table 1 shows the configurations of Examples (Nos. 1 to 4) that satisfy the requirements of the marking method according to the present invention and Comparative Examples (Nos. 5 to 10) that do not satisfy the requirements, and marking is performed by each method. The evaluation results are shown.

In this test, a tip of a ballpoint pen was pressed against an aluminum plate (1100-O material: 1t) having a thickness of about 1 mm manufactured by a conventional method to artificially create a defect of width 1.0 mm × length 1.0 mm. And conveyed to the line at a speed of 100 m / min. And after applying 1 g / m ^{2 of} rust preventive oil, marking was carried out under each condition.

  The marking on the aluminum plate was performed by a rotary roll method, an ink jet method, a magic method, a paint method, or a stamping pen method having a columnar projection with a diameter of 5 mm or a square column shape with a piece of 5 mm. In the rotating roll method, the pressure at the time of indentation was set to 0.4 MPa.

  The rotating roll system is an embodiment according to the system according to the present invention, and is formed by pressing an aluminum plate in association with a defect detection signal of a defect detection apparatus to form a group of indentations having a length of 500 mm. In the ink jet magic paint method, marking is performed by a sprayer or a paint device in conjunction with the defect detection signal. The stamping pen method is to stamp a stamping mark having a depth of 50 μm with a steel wedge-shaped jig whose tip is inclined at 45 degrees.

  The marking transfer is evaluated by visually confirming that no ink or paint has been transferred to another normal surface. If the marking is not transferred, “○ (good)” is transferred slightly. Were evaluated as “Δ (substantially good)”, and those transferred were evaluated as “x (defect)”.

  Evaluation of wrinkles during transport is based on whether or not the aluminum plate can be marked without being scratched even when transported at 100 m / min. The thing which generate | occur | produced was set to "x (defect)."

  The evaluation of wrinkles at the time of winding is made by cutting the entire length of the obtained aluminum coil into 1 m length in the longitudinal direction, visually inspecting the front and back surfaces of all the cut plates, and marking the artificially inserted defects and markings. The device configuration in which no other wrinkles were found was evaluated as “◯ (good)”, and the device configuration in which wrinkles were found was evaluated as “× (bad)”. As defects other than artificially inserted defects and marked defects, aluminum powder and aluminum strips (those with burrs) produced by marking on the surface of the aluminum coil are pushed in by coil winding. A flaw was discovered.

  Marking readability is evaluated based on whether or not the marking can be confirmed by optical detector and visual detection. Marks that can be read are marked with “Good (Good)”, and those that are partially impossible with blurring, etc. “△ (substantially good)”, and “× (defect)” that was impossible.

  As shown in Table 1, when marking is performed using Examples (Nos. 1 to 4) that satisfy the requirements of the indentation apparatus according to the present invention, marking transfer, wrinkle during conveyance, wrinkle during winding, marking It can be seen that the evaluation is “◯ (good)” in any evaluation of readability. Moreover, the influence by antirust oil coating was not seen in that case.

  On the other hand, in the comparative examples (Nos. 5 to 10) that do not satisfy the necessary conditions of the present invention, the marking method is different from the present invention, or the marking depth is less than the lower limit value or the upper limit value of the range defined by the present invention. As a result, the value required at the time of marking was not sufficiently satisfied.

  Comparative Example No. In No. 5, the depth of the indentation formed by the rotating roll is not more than the lower limit of the range defined by the present invention. Accordingly, the unevenness due to the indentation became unclear due to the influence of the oil film, and the marking readability was evaluated as “x (defect)”. Comparative Example No. In No. 6, the depth of the indentation formed by the rotating roll exceeds the upper limit of the range defined by the present invention. Therefore, there were many burrs that occurred when forming the indentation, and the normal surface of the coil was wrinkled, and the wrinkle at the time of winding was evaluated as “x (defect)”.

  In the comparative examples (No. 7 to 9), since marking is performed using ink, paint, etc., in the evaluation of marking transfer, “△ (substantially good)” in the inkjet method and paint method, and in the magic method, It was evaluated as “× (defect)”. Also, in the evaluation of marking readability, the magic marking method was evaluated as “× (defect)” by the optical detector, and the inkjet method and the magic method were evaluated as “Δ (substantially good)” by visual detection. Furthermore, in the comparative examples (Nos. 7 to 9), the ink / paint smeared due to the antirust oil.

  In the comparative example (No. 10), since a non-rotatable stamping pen is used, it is impossible to accurately follow the conveyance speed, and a large linear wrinkle is generated on the roll surface during stamping. did. Therefore, the wrinkle at the time of conveyance and the wrinkle at the time of winding were evaluated as “× (defect)”.

  In the following, the effects of the application of rust preventive oil, the radius of curvature of the crown of the rotating roll, and the opening of the speed controller (hereinafter referred to as speed controller) on the indentation group will be specifically described. Table 2 shows markings when the opening of the speed controller is adjusted appropriately (No. 1 to 3) and when the opening of the speed controller is not adjusted appropriately (No. 4 to 8) and the respective conditions. The result of performing is shown.

  Each condition such as the manufacturing method, material, conveyance speed, pressure, etc. of the aluminum plate used in this test is the same as in the test of Example 1. In addition, marking on the aluminum plate was performed by an indentation device provided with a prismatic rotary roll (5 mm on a side) according to the present invention, and in each example, an indentation group of 500 mm was formed in the length direction of the aluminum plate. In addition, as marking conditions, the presence or absence of rust preventive oil before indentation, the radius of curvature of the crown at the projection (700 to 3000 mm), the opening degree of the speed controller (8 to 100%), the state of the indentation group, Provided.

  The evaluation of the occurrence of burrs was performed by how much burrs and wear powder were generated on the aluminum plate on which the indentation group was formed.

  The evaluation of wrinkles at the time of winding is made by cutting the entire length of the obtained aluminum coil into 1 m length in the longitudinal direction, visually inspecting the front and back surfaces of all the cut plates, and marking the artificially inserted defects and markings. The device configuration in which no other wrinkles were found was evaluated as “◯ (good)”, and the device configuration in which wrinkles were found was evaluated as “× (bad)”. As defects other than artificially inserted defects and marked defects, aluminum powder and aluminum strips (those with burrs) produced by marking on the surface of the aluminum coil are pushed in by coil winding. A flaw was discovered.

  In addition, the evaluation of the depth of the indentation group was performed using Veco instruments Inc. Measure the shape with "WYKO NT3300 (surface shape measurement system)" manufactured by the United States (USA) to measure the depth of the unevenness and confirm whether the depth is uniform in the width direction and the length direction. Was done. The evaluation of the state of the indentation group specifically verified the state of the indentation group formed on the aluminum plate.

  As shown in Table 2, when the opening degree of the speed controller is appropriately adjusted (Nos. 11 to 13), it is good in any evaluation of generation of burrs, wrinkles during winding, and depth of the indentation group. It can be seen that the state of the indentation group is almost uniform in the depth and length directions.

  On the other hand, when the opening degree of the speed controller is not properly adjusted (No. 14 to 18), the antirust oil is not applied, or the radius of curvature of the crown or the opening degree of the speed controller is defined by the present invention. Is less than the lower limit value or exceeds the upper limit value. The result that marking became non-uniform | heterogenous compared with 11-13 was obtained.

  No. In No. 14, since the rust preventive oil was not applied before the indentation, a large amount of burrs occurred on the aluminum plate after marking, and the normal surface of the coil was wrinkled. (Poor) ”. No. 15, since the radius of curvature of the crown was less than the lower limit of the range defined in the present invention, burrs occurred at the center in the width direction of the indentation group, and wrinkles occurred on the normal surface of the coil. The wrinkle was evaluated as “× (defect)”. Furthermore, the depth of the indentation at the center in the width direction became deeper than the width ends.

  No. In No. 16, the radius of curvature of the crown exceeded the upper limit of the range defined in the present invention, so that burrs occurred at both ends of the width of the indentation group, and the normal surface of the coil was wrinkled. The rating was evaluated as “× (defect)”. Furthermore, the depth of the indentation at both ends of the width became deeper than the center in the width direction. No. In No. 17, since the opening of the speed controller was less than the lower limit value of the range defined in the present invention, the initial length direction of the indentation group became non-uniform. No. In No. 18, since the opening of the speed controller exceeded the upper limit of the range defined in the present invention, the initial length direction of the indentation group during the indentation became deep.

DESCRIPTION OF SYMBOLS 1a Aluminum plate 1b Coil 2 Defect detection apparatus 3 Control part 4 Antirust oiling apparatus 5 Defect marking apparatus 5a Indentation apparatus 5b Follower roll 6 Conveyance roll 6a Rotation determination means 7 Tension reel 8 Roller 8a Cylindrical part 8b Protrusion part 9 Bearing 10 Cylinder 11 Speed controller 12 Defective part 13 Indentation group

Claims (9)

In a processing line for winding an aluminum plate conveyed by a conveying roll around a coil, a defect marking device that forms an indentation on a defective portion detected by a defect detection device,
The defect marking device is:
A roller comprising a cylindrical portion and a plurality of protrusions formed along the outer peripheral surface of the cylindrical portion;
A bearing that rotatably supports the roller;
An up-and-down mechanism that supports the bearing and drives the bearing in a direction in contact with the aluminum plate;
A driven roll that supports the aluminum plate below the vertical mechanism,
Based on an instruction from the defect detection device, the roller presses the aluminum plate on the driven roll to form an indentation having a depth of 5 to 50 μm with respect to the defective portion of the aluminum plate. Defect marking device.   2. The defect marking device according to claim 1, wherein the plurality of protrusions are columnar in cross section with a circle-equivalent diameter of 0.5 to 5 mm. The driven roll is formed of a urethane material or a rubber material,
The plurality of protrusions are provided at regular intervals so as to have a curvature with a protrusion formed at the center in the width direction of the roller as a vertex.
The defect marking device according to claim 1, wherein a radius of the curvature is in a range of 500 to 2000 mm.   The defect marking device according to any one of claims 1 to 3, wherein the defect marking device forms an indentation group having a length of 200 to 600 mm with respect to a defective portion of the aluminum plate. The vertical mechanism includes a flow rate control valve that controls a driving speed of the vertical mechanism by adjusting a discharge amount of the fluid in a discharge path through which an internal fluid is discharged.
5. The flow rate control valve according to claim 1, wherein the driving speed of the vertical mechanism is reduced by adjusting an opening degree of the discharge path within a range of 15 to 60%. The defect marking device according to item 1. A defect marking processing line that forms an indentation group on a defect portion of an aluminum plate that flows on a transport roll and winds it around a coil,
A defect detection device for detecting a defect on the surface of the aluminum plate;
A rust preventive oil application device for applying a rust preventive oil to the surface of the aluminum plate;
Based on an instruction from the defect detection device, a defect marking device that presses the aluminum plate and forms an indentation having a depth of 5 to 50 μm with respect to the defective portion of the aluminum plate;
A defect marking processing line characterized by comprising:   The defect marking processing line according to claim 6, wherein the indentation device is disposed after the antirust oil coating device. In a processing line for winding an aluminum plate flowing on a transport roll around a coil, a defect marking method for forming an indentation group in a defective portion,
A detection step of detecting a defect portion on the surface of the aluminum plate by a defect detection device;
With an anti-rust oil application device, an oil application process for applying anti-rust oil to the surface of the aluminum plate;
Based on an instruction from the defect detection device, an indentation step of pressing the aluminum plate with an indentation device provided with a roller to form an indentation having a depth of 5 to 50 μm with respect to the defective portion of the aluminum plate;
A defect marking method characterized by comprising: In a processing line for winding an aluminum plate flowing on a transport roll around a coil, a method for manufacturing a coil with a defect marking,
A detection step of detecting a defect portion on the surface of the aluminum plate by a defect detection device;
With an anti-rust oil application device, an oil application process for applying anti-rust oil to the surface of the aluminum plate;
Based on an instruction from the defect detection device, an indentation step of pressing the aluminum plate with an indentation device provided with a roller to form an indentation having a depth of 5 to 50 μm with respect to the defective portion of the aluminum plate;
A winding step that turns the aluminum plate that has undergone the indentation step into a winding coil;
A method for producing a defect-marked coil, comprising:

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