JP2021062395A - Method for forming hole for detecting position of metal strip - Google Patents

Method for forming hole for detecting position of metal strip Download PDF

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JP2021062395A
JP2021062395A JP2019189062A JP2019189062A JP2021062395A JP 2021062395 A JP2021062395 A JP 2021062395A JP 2019189062 A JP2019189062 A JP 2019189062A JP 2019189062 A JP2019189062 A JP 2019189062A JP 2021062395 A JP2021062395 A JP 2021062395A
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metal strip
hole
position detection
detecting
detection hole
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JP7059996B2 (en
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美和 割鞘
Miwa Warisaya
美和 割鞘
優 長井
Yu Nagai
優 長井
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JFE Steel Corp
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Abstract

To provide a method for forming a hole for detecting a position of a metal strip, capable of detecting the position of the metal strip in a transport direction while suppressing breakage of the metal strip during transportation.SOLUTION: The method for forming a hole for detecting a position of a metal strip according to the present invention forms in the metal strip, the hole for detecting the position of the metal strip in a transport direction in a line for continuously transporting and processing the metal strip. The method comprises: a first step of forming the hole for detecting the position in the metal strip; and a second step of grinding an end face of the hole for detecting the position.SELECTED DRAWING: Figure 3

Description

本発明は、金属ストリップの位置検出用穴の形成方法に関する。 The present invention relates to a method for forming a hole for detecting the position of a metal strip.

一般に、金属ストリップの処理ラインにおいては、金属ストリップを連続して処理するために、先行する金属ストリップの尾端部と後行する金属ストリップの先端部とを溶接機で溶接することにより接続する。溶接機によって形成された溶接部は、通常、金属ストリップの処理後に切断除去することによってスクラップとされるので、接続された金属ストリップのどの位置に溶接部があるのか検出できるようにしておく必要がある。このような背景から、特許文献１には、溶接部の近傍に溶接部検出用穴（位置検出用穴）を開け、搬送ライン上を移動する金属ストリップの位置を検出する位置検出装置を利用して溶接部検出用穴を検出することにより、ライン通板時に金属ストリップのトラッキング（金属ストリップの位置追跡）を行う技術が提案されている。 Generally, in a metal strip processing line, in order to continuously process a metal strip, the tail end of the preceding metal strip and the tip of the succeeding metal strip are connected by welding with a welding machine. The weld formed by the welder is usually scrapped by cutting and removing after processing the metal strip, so it is necessary to be able to detect where the weld is located on the connected metal strip. is there. Against this background, Patent Document 1 uses a position detecting device for detecting the position of a metal strip moving on a transport line by making a hole for detecting a welded portion (a hole for detecting a position) in the vicinity of the welded portion. There has been proposed a technique for tracking a metal strip (tracking the position of a metal strip) at the time of passing a line by detecting a hole for detecting a welded portion.

特開２０１０−８５２１３号公報JP-A-2010-85213

本発明の発明者らは、特許文献１に記載の技術のように金属ストリップに剪断等で位置検出用穴を形成すると、図４（ａ）に示すように金属ストリップ１の位置検出用穴２の周囲に歪みが導入されて加工硬化領域３が形成され、この状態で金属ストリップ１を圧延すると、図４（ｂ）に示すように位置検出用穴２の端面に亀裂４が発生し、その後さらに圧延したり、搬送したりすると、亀裂４を起点として金属ストリップ１が破断してしまう可能性があることを知見した。 When the inventors of the present invention form a position detection hole in the metal strip by rolling or the like as in the technique described in Patent Document 1, the position detection hole 2 of the metal strip 1 is shown in FIG. 4 (a). A strain is introduced around the surface to form a work-hardened region 3, and when the metal strip 1 is rolled in this state, a crack 4 is generated in the end face of the position detection hole 2 as shown in FIG. 4 (b), and then the crack 4 is generated. It has been found that the metal strip 1 may be broken starting from the crack 4 when it is further rolled or conveyed.

本発明は、上記課題に鑑みてなされたものであって、その目的は、搬送時に金属ストリップが破断することを抑制しつつ金属ストリップの搬送方向の位置を検出可能な金属ストリップの位置検出用穴の形成方法を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to detect a position of a metal strip in a transport direction while suppressing breakage of the metal strip during transport. Is to provide a method of forming.

本発明に係る金属ストリップの位置検出用穴の形成方法は、金属ストリップを連続的に搬送して処理するライン内における金属ストリップの搬送方向の位置を検出するための位置検出用穴を金属ストリップに形成する金属ストリップの位置検出用穴の形成方法であって、前記金属ストリップに位置検出用穴を形成する第一ステップと、前記位置検出用穴の端面を研削する第二ステップと、を含むことを特徴とする。 In the method for forming the position detection hole of the metal strip according to the present invention, the position detection hole for detecting the position of the metal strip in the transport direction in the line for continuously transporting and processing the metal strip is formed in the metal strip. A method for forming a position detection hole of a metal strip to be formed, which includes a first step of forming a position detection hole in the metal strip and a second step of grinding the end face of the position detection hole. It is characterized by.

本発明に係る金属ストリップの位置検出用穴の形成方法は、上記発明において、前記位置検出用穴は、曲線で囲まれた形状を有していることを特徴とする。 The method for forming a position detection hole of a metal strip according to the present invention is characterized in that, in the above invention, the position detection hole has a shape surrounded by a curved line.

本発明に係る金属ストリップの位置検出用穴の形成方法は、上記発明において、前記第二ステップは、前記金属ストリップの母材の硬度と前記位置検出用穴の端部の硬度との差が５０ＨＶ未満となるように前記位置検出用穴の端面を研削するステップを含むことを特徴とする。 In the method for forming a hole for position detection of a metal strip according to the present invention, in the second step, the difference between the hardness of the base material of the metal strip and the hardness of the end of the hole for position detection is 50 HV. It is characterized by including a step of grinding the end face of the position detecting hole so as to be less than.

本発明に係る金属ストリップの位置検出用穴の形成方法によれば、搬送時に金属ストリップが破断することを抑制しつつ金属ストリップの搬送方向の位置を検出することができる。 According to the method for forming a hole for detecting the position of a metal strip according to the present invention, it is possible to detect the position of the metal strip in the transport direction while suppressing the metal strip from breaking during transport.

図１は、位置検出用穴の端面からの金属ストリップのビッカース硬さの変化の一例を示す図である。FIG. 1 is a diagram showing an example of a change in Vickers hardness of a metal strip from an end face of a position detection hole. 図２は、位置検出用穴の端面からの金属ストリップのビッカース硬さの変化の測定方法を説明するための模式図である。FIG. 2 is a schematic view for explaining a method of measuring a change in Vickers hardness of a metal strip from an end face of a position detection hole. 図３は、圧延後の本発明に係る位置検出用穴を示す模式図である。FIG. 3 is a schematic view showing a position detection hole according to the present invention after rolling. 図４は、従来の位置検出用穴の課題を説明するための模式図である。FIG. 4 is a schematic diagram for explaining the problem of the conventional position detection hole.

以下、図面を参照して、本発明に係る金属ストリップの位置検出用穴の形成方法について説明する。 Hereinafter, a method for forming a hole for detecting the position of a metal strip according to the present invention will be described with reference to the drawings.

図１は、位置検出用穴の端部からの金属ストリップのビッカース硬さの変化の一例を示す図である。なお、図１に示す例では、図２に示すように位置検出用穴２が形成された金属ストリップ１について破線位置をディスクグラインダーで切断後、切断面の表面を研磨して切断により導入された歪みを除去した。そして、位置検出用穴２の端面位置Ｐから矢印方向に沿って切断面（カット断面）の板厚中央部でビッカース硬さ（ＨＶ）を測定することにより、位置検出用穴２の端部からの金属ストリップ１のビッカース硬さの変化を測定した。なお、ビッカース硬さの測定は、表面欠陥等の外乱影響を抑えるため、切断面の板厚中央部で行うことが好ましいが、板表面で測定してもよい。また放電加工等の歪みが導入されない手段で切断を行った場合、切断面の研磨は不要である。 FIG. 1 is a diagram showing an example of a change in Vickers hardness of a metal strip from the end of a position detection hole. In the example shown in FIG. 1, the metal strip 1 in which the position detection hole 2 was formed was cut at the broken line position with a disc grinder as shown in FIG. 2, and then the surface of the cut surface was polished and introduced by cutting. The distortion was removed. Then, by measuring the Vickers hardness (HV) at the center of the plate thickness of the cut surface (cut cross section) along the direction of the arrow from the end face position P of the position detection hole 2, the Vickers hardness (HV) is measured from the end of the position detection hole 2. The change in Vickers hardness of the metal strip 1 of the above was measured. The Vickers hardness is preferably measured at the center of the plate thickness of the cut surface in order to suppress the influence of disturbance such as surface defects, but it may be measured at the plate surface. Further, when cutting is performed by a means such as electric discharge machining that does not introduce distortion, polishing of the cut surface is unnecessary.

図１に示すように、位置検出用穴の端面から約０．７ｍｍまでの範囲では、ビッカース硬さが金属ストリップの母材のビッカース硬さ（加工をうけていない部分の金属ストリップの硬さ）より大きくなっていることがわかる。ここで、母材のビッカース硬さは位置検出用穴の端面から十分に離れた位置、例えば端面から２ｍｍ程度以上離れた位置でのビッカース硬さとする（図１に破線で図示）。このため、本発明では、位置検出用穴の端面を研削することにより、位置検出用穴の形成に伴って形成された加工硬化領域（歪み領域）を除去し、搬送時に金属ストリップが破断することを抑制することとした。より具体的には、図１に示す例では、ビッカース硬さが金属ストリップの母材のビッカース硬さよりも５０ＨＶ以上大きくなっている部分（位置検出用穴の端面から少なくとも０．５ｍｍ迄の領域）を研削する、換言すれば、金属ストリップの母材の硬度と位置検出用穴の端部の硬度との差が５０ＨＶ未満となるように位置検出用穴の端面を研削したところ、図３に示すように圧延後の位置検出用穴２の周囲には亀裂等が発生せず、位置検出用穴に起因する破断を抑制できた。ここで、位置検出用穴の端部の硬度とは、鋼板最端部から０．０５ｍｍ鋼板側に入った部分の硬度とする。 As shown in FIG. 1, in the range from the end face of the position detection hole to about 0.7 mm, the Vickers hardness is the Vickers hardness of the base metal of the metal strip (the hardness of the metal strip in the unprocessed portion). You can see that it is getting bigger. Here, the Vickers hardness of the base material is defined as the Vickers hardness at a position sufficiently distant from the end face of the position detection hole, for example, at a position distant from the end face by about 2 mm or more (shown by a broken line in FIG. 1). Therefore, in the present invention, by grinding the end face of the position detection hole, the work-hardened region (distortion region) formed by the formation of the position detection hole is removed, and the metal strip is broken during transportation. Was decided to be suppressed. More specifically, in the example shown in FIG. 1, the portion where the Vickers hardness is 50 HV or more larger than the Vickers hardness of the base metal of the metal strip (the region at least 0.5 mm from the end face of the position detection hole). In other words, the end face of the position detection hole was ground so that the difference between the hardness of the base material of the metal strip and the hardness of the end of the position detection hole was less than 50 HV. As described above, no cracks or the like were generated around the position detection hole 2 after rolling, and the breakage caused by the position detection hole could be suppressed. Here, the hardness of the end portion of the position detection hole is the hardness of the portion that enters the steel plate side by 0.05 mm from the outermost end portion of the steel plate.

これに対して、位置検出用穴の端面を研削しない場合や研削による除去範囲が位置検出用穴の端面から０．５ｍｍ未満である場合（金属ストリップの母材の硬度と、研削後の位置検出用穴の端部の硬度との差が５０ＨＶ以上である場合）には、図４（ｂ）に示したように位置検出用穴２の端面に亀裂４が発生した。なお、本発明では、位置検出用穴の形状は、円形（真円）でなくてもよいが、多角形形状等の角を有する形状であると歪みを除去しても形状に起因して金属ストリップが破断する可能性があるので、曲線で囲まれた形状であることが望ましい。ここで、研削手段は、ビッカース硬さが金属ストリップの母材のビッカース硬さよりも５０ＨＶ以上大きくなっている部分を除去可能なものであればその種類は問わないが、例えば研削用のドリルややすり等が挙げられる。なお、本発明では研削によるものであるため、研削手段であるドリルややすり等を穴位置まで移動させる装置や、研削手段を駆動させる装置があれば十分であり、設備をコンパクトにすることができる。 On the other hand, when the end face of the position detection hole is not ground or the removal range by grinding is less than 0.5 mm from the end face of the position detection hole (hardness of the base metal of the metal strip and position detection after grinding). When the difference from the hardness of the end portion of the hole 2 is 50 HV or more), a crack 4 is generated on the end surface of the position detection hole 2 as shown in FIG. 4 (b). In the present invention, the shape of the position detection hole does not have to be circular (perfect circle), but if it is a shape having corners such as a polygonal shape, even if distortion is removed, the metal is caused by the shape. It is desirable to have a curved shape, as the strip may break. Here, the grinding means may be of any type as long as it can remove a portion where the Vickers hardness is 50 HV or more larger than the Vickers hardness of the base metal of the metal strip. For example, a drill or a file for grinding may be used. And so on. Since this invention is based on grinding, it is sufficient to have a device for moving a drill or a file, which is a grinding means, to a hole position, or a device for driving the grinding means, and the equipment can be made compact. ..

以上、本発明者らによってなされた発明を適用した実施形態について説明したが、本実施形態による本発明の開示の一部をなす記述及び図面により本発明は限定されることはない。すなわち、本実施形態に基づいて当業者等によりなされる他の実施の形態、実施例、及び運用技術等は全て本発明の範疇に含まれる。 Although the embodiment to which the invention made by the present inventors has been applied has been described above, the present invention is not limited by the description and the drawings which form a part of the disclosure of the present invention according to the present embodiment. That is, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.

１ 金属ストリップ
２ 位置検出用穴
３ 加工硬化領域
４ 亀裂 1 Metal strip 2 Position detection hole 3 Work hardening area 4 Crack

Claims (3)

金属ストリップを連続的に搬送して処理するライン内における金属ストリップの搬送方向の位置を検出するための位置検出用穴を金属ストリップに形成する金属ストリップの位置検出用穴の形成方法であって、
前記金属ストリップに位置検出用穴を形成する第一ステップと、
前記位置検出用穴の端面を研削する第二ステップと、
を含むことを特徴とする金属ストリップの位置検出用穴の形成方法。 A method for forming a position detection hole for a metal strip in the metal strip for detecting a position in the transport direction of the metal strip in a line for continuously transporting and processing the metal strip.
The first step of forming a position detection hole in the metal strip,
The second step of grinding the end face of the position detection hole and
A method for forming a hole for detecting the position of a metal strip, which comprises. 前記位置検出用穴は、曲線で囲まれた形状を有していることを特徴とする請求項１に記載の金属ストリップの位置検出用穴の形成方法。 The method for forming a position detection hole for a metal strip according to claim 1, wherein the position detection hole has a shape surrounded by a curved line. 前記第二ステップは、前記金属ストリップの母材の硬度と前記位置検出用穴の端部の硬度との差が５０ＨＶ未満となるように前記位置検出用穴の端面を研削するステップを含むことを特徴とする請求項１又は２に記載の金属ストリップの位置検出用穴の形成方法。 The second step includes grinding the end face of the position detecting hole so that the difference between the hardness of the base material of the metal strip and the hardness of the end of the position detecting hole is less than 50 HV. The method for forming a hole for detecting the position of a metal strip according to claim 1 or 2.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116786630A (en) * 2023-08-25 2023-09-22 邹城市云天矿山科技有限公司 Sheet metal part punching hole detection device and sheet metal part punching hole detection method

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Publication number Priority date Publication date Assignee Title
JPS48100588A (en) * 1972-04-11 1973-12-19
JPS6462218A (en) * 1987-08-31 1989-03-08 Kawasaki Steel Co Method for detecting welding point of metal strip
JP2004250763A (en) * 2003-02-21 2004-09-09 Nisshin Steel Co Ltd Method for removing deposit on surface of roll in steel strip heat treatment furnace
JP2006241578A (en) * 2005-03-07 2006-09-14 Jfe Steel Kk Method for producing metal strip and metal strip treating process line
KR20130017946A (en) * 2011-08-12 2013-02-20 주식회사 포스코 Apparatus for detecting welding part

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48100588A (en) * 1972-04-11 1973-12-19
JPS6462218A (en) * 1987-08-31 1989-03-08 Kawasaki Steel Co Method for detecting welding point of metal strip
JP2004250763A (en) * 2003-02-21 2004-09-09 Nisshin Steel Co Ltd Method for removing deposit on surface of roll in steel strip heat treatment furnace
JP2006241578A (en) * 2005-03-07 2006-09-14 Jfe Steel Kk Method for producing metal strip and metal strip treating process line
KR20130017946A (en) * 2011-08-12 2013-02-20 주식회사 포스코 Apparatus for detecting welding part

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116786630A (en) * 2023-08-25 2023-09-22 邹城市云天矿山科技有限公司 Sheet metal part punching hole detection device and sheet metal part punching hole detection method
CN116786630B (en) * 2023-08-25 2023-11-14 邹城市云天矿山科技有限公司 Sheet metal part punching hole detection device and sheet metal part punching hole detection method

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