JP2011218529A - Cutting tool and bead cutting apparatus - Google Patents

Cutting tool and bead cutting apparatus Download PDF

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JP2011218529A
JP2011218529A JP2010093286A JP2010093286A JP2011218529A JP 2011218529 A JP2011218529 A JP 2011218529A JP 2010093286 A JP2010093286 A JP 2010093286A JP 2010093286 A JP2010093286 A JP 2010093286A JP 2011218529 A JP2011218529 A JP 2011218529A
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cutting
bead
steel plate
cutting tool
recess
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JP5434764B2 (en
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Akihiko Taniguchi
明彦 谷口
Itaru Nakamura
到 中村
Yoshinori Miyamoto
善徳 宮本
Tsutomu Nakao
勉 中尾
Nozomi Mitsutake
望 光武
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Nippon Steel Corp
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Nippon Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool and a bead cutting apparatus that smoothly discharge cutting chips without increasing a rake angle in cutting and have small cutting resistance.SOLUTION: The cutting tool 12 is mounted to a bead cutting apparatus that cuts beads generated in the flash butt welding of the rear end of a preceding steel plate and the tip of a succeeding steel plate in a continuous rolling line of steel plates. In the cutting tool 12, circular arcuate recesses 15, 16 in a lateral cross sectional view are formed at rake faces 13, 14 where opening widths W of the recesses 15, 16 are 7-15 mm, maximum depths D are 0.5-2.0 mm, and distances L from tips of blades 17, 18 to starting points of the recesses 15, 16 are 2-6 mm. Also, the rake angle of the cutting tool 12 mounted to the bead cutting apparatus is set at 5-17°.

Description

本発明は、鋼板の連続圧延ラインにおけるフラッシュバット溶接時に生じるビードを切削するビード切削装置及び該ビード切削装置に装着される切削バイトに関する。 The present invention relates to a bead cutting device for cutting a bead generated at the time of flash butt welding in a continuous rolling line of a steel sheet, and a cutting tool attached to the bead cutting device.

鋼板の連続圧延ラインでは、先行鋼板の後端と後行鋼板の先端とを接続するため、フラッシュバット溶接が広く用いられている。フラッシュバット溶接はフラッシング工程とアップセット工程からなり、アップセット工程での強い圧接によって、溶接面の外部にメタルとスラグが押し出されてビードが形成される。鋼板に形成されたビードをそのままにしておくと、フラッシュバット溶接後の圧延工程において鋼板に疵が発生したり、鋼板が破断したりする。このため、フラッシュバット溶接によって生じたビードは、フラッシュトリマ又はビードトリマと呼ばれるビード切削装置により平滑に切削（フラッシュトリミング）される（例えば、特許文献１参照）。 In a continuous rolling line for steel plates, flash butt welding is widely used to connect the rear end of the preceding steel plate and the front end of the subsequent steel plate. Flash butt welding consists of a flushing process and an upset process, and metal and slag are pushed out of the weld surface by a strong pressure welding in the upset process to form a bead. If the bead formed on the steel plate is left as it is, wrinkles are generated in the steel plate in the rolling process after flash butt welding, or the steel plate is broken. For this reason, the bead produced by flash butt welding is smoothly cut (flash trimmed) by a bead cutting device called a flash trimmer or a bead trimmer (see, for example, Patent Document 1).

実開昭６３−１１６１８６号公報Japanese Utility Model Publication No. 63-116186

ビード切削後に削り残しや切削屑として部分的にでも鋼板上にビードが残存している場合、鋼板圧延時に圧延ロールに疵が付き、その疵が鋼板に連続的に転写してロール疵となりやすい。そのため、ビード切削においては、削り残しが無いようにすると共に、切削屑を円滑に除去することが重要となる。 When the bead remains on the steel plate even as part of uncut residue or cutting waste after bead cutting, the rolling roll is wrinkled at the time of rolling the steel plate, and the wrinkle is continuously transferred to the steel plate and easily becomes a roll wrinkle. Therefore, in bead cutting, it is important that there is no uncut residue and that the cutting waste is removed smoothly.

図５は切削角を示した模式図であり、切削バイトの進行方向の前面は、切削された切削屑をすくい取る役割をしているため、すくい面と呼んでおり、すくい面と仮想鉛直面との間の角度をすくい角という。また、切削バイトと被切削物との間に空間を作るための角度を逃げ角という。一般に、切削時のすくい角が大きい（逃げ角が小さい）と、切削バイト先端が欠けやすくなり、ビードの削り残しにつながる。逆に、すくい角が小さい（逃げ角が大きい）と、切削屑が円滑に排出されず、結果的に切削抵抗が大きくなり切削面の蛇行につながる。 FIG. 5 is a schematic diagram showing the cutting angle. Since the front surface of the cutting tool in the traveling direction plays a role of scooping off the cut swarf, it is called a rake surface. The angle between is called the rake angle. An angle for creating a space between the cutting tool and the workpiece is called a clearance angle. Generally, when the rake angle at the time of cutting is large (the clearance angle is small), the tip of the cutting tool tends to be chipped, leading to uncut parts of the bead. Conversely, if the rake angle is small (the relief angle is large), the cutting waste is not discharged smoothly, resulting in an increase in cutting resistance and a meandering of the cutting surface.

本発明はかかる事情に鑑みてなされたもので、切削屑が円滑に排出され、切削抵抗も小さな切削バイト及びビード切削装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object thereof is to provide a cutting tool and a bead cutting device in which cutting waste is smoothly discharged and cutting resistance is small.

上記目的を達成するため、第１の発明は、鋼板の連続圧延ラインにおいて先行鋼板の後端と後行鋼板の先端とをフラッシュバット溶接した際に生じるビードを切削するビード切削装置に装着される切削バイトにおいて、側断面視して円弧状の凹部がすくい面に形成され、前記凹部の開口幅が７ｍｍ〜１５ｍｍ、且つ前記凹部の最大深さが０．５ｍｍ〜２．０ｍｍであることを特徴としている。 In order to achieve the above object, the first invention is mounted on a bead cutting device for cutting a bead generated when flash butt welding is performed on the rear end of a preceding steel plate and the front end of a subsequent steel plate in a continuous rolling line of the steel plate. In the cutting tool, an arc-shaped recess is formed on the rake face as viewed from the side, the opening width of the recess is 7 mm to 15 mm, and the maximum depth of the recess is 0.5 mm to 2.0 mm. It is said.

凹部開口幅が７ｍｍ未満であると、切削屑が凹部に引っ掛かりやすくなると共に、切削屑の分断性が悪くなる。一方、開口幅が１５ｍｍを超えると、切削屑の分断性が悪くなる。また、凹部の最大深さが０．５ｍｍ未満であると、切削屑の螺旋径が大きくなり過ぎる一方、最大深さが２．０ｍｍを超えると、切削抵抗が大きくなり過ぎる。 When the opening width of the recess is less than 7 mm, the cutting waste is easily caught in the recess, and the cutting property of the cutting waste is deteriorated. On the other hand, when the opening width exceeds 15 mm, the cutting property of the cutting waste is deteriorated. On the other hand, when the maximum depth of the recess is less than 0.5 mm, the spiral diameter of the cutting waste becomes too large, whereas when the maximum depth exceeds 2.0 mm, the cutting resistance becomes too large.

また、第１の発明に係る切削バイトでは、側断面視して、刃部の先端から前記凹部の開始点までの距離が２ｍｍ〜６ｍｍであることを好適とする。 In the cutting tool according to the first aspect of the present invention, it is preferable that the distance from the tip of the blade part to the starting point of the concave part is 2 mm to 6 mm in a side sectional view.

刃部の先端から凹部の開始点までの距離が２ｍｍ未満であると、刃欠けまでの寿命が短くなる一方、刃部の先端から凹部の開始点までの距離が６ｍｍを超えると、切削屑の螺旋径が大きくなり過ぎる。 If the distance from the tip of the blade to the starting point of the recess is less than 2 mm, the life until the chip of the blade is shortened. On the other hand, if the distance from the tip of the blade to the starting point of the recess exceeds 6 mm, The spiral diameter becomes too large.

さらにまた、第２の発明は、第１の発明に係る切削バイトが装着され、鋼板の連続圧延ラインにおいて先行鋼板の後端と後行鋼板の先端とをフラッシュバット溶接した際に生じるビードを切削するビード切削装置において、前記切削バイトのすくい角を５°〜１７°とすることを特徴としている。 Furthermore, the second invention is equipped with the cutting tool according to the first invention, and cuts a bead generated when the rear end of the preceding steel plate and the front end of the subsequent steel plate are flash-butt welded in the continuous rolling line of the steel plate. In the bead cutting device, the cutting tool has a rake angle of 5 ° to 17 °.

すくい角が５°未満であると、切削抵抗が大きくなり過ぎる一方、すくい角が１７°を超えると、刃欠けまでの寿命が短くなる。 When the rake angle is less than 5 °, the cutting resistance becomes excessively large, whereas when the rake angle exceeds 17 °, the life until the cutting edge is shortened.

本発明に係る切削バイトは、切削バイトのすくい面に、側断面視して円弧状の凹部を設け、凹部の開口幅を７ｍｍ〜１５ｍｍ、且つ凹部の最大深さを０．５ｍｍ〜２．０ｍｍとし、さらにこの切削バイトが装着されたビード切削装置は、切削バイトのすくい角を５°〜１７°としているので、ビードを切削した際、切削抵抗が小さく、発生した切削屑は円弧状の凹部に沿って螺旋状に回転して分断される。その結果、切削屑が円滑に排出される。 The cutting tool according to the present invention is provided with an arc-shaped recess on the rake face of the cutting tool in a side sectional view, the opening width of the recess is 7 mm to 15 mm, and the maximum depth of the recess is 0.5 mm to 2.0 mm. Furthermore, the bead cutting device to which this cutting tool is attached has a rake angle of 5 to 17 °, so that when cutting the bead, the cutting resistance is small, and the generated cutting waste is an arc-shaped recess. It is divided by rotating along a spiral. As a result, cutting waste is discharged smoothly.

フラッシュバット溶接を説明するための模式図であり、（Ａ）はフラッシング工程、（Ｂ）はアップセット工程を示している。It is a schematic diagram for demonstrating flash butt welding, (A) has shown the flushing process, (B) has shown the upset process. （Ａ）は切削バイトが装着されたバイトホルダの正面図、（Ｂ）は同バイトホルダの側面図である。(A) is a front view of a tool holder to which a cutting tool is mounted, and (B) is a side view of the tool holder. （Ａ）は本発明の一実施の形態に係る切削バイトの正面図、（Ｂ）は同切削バイトの側面図である。(A) is a front view of a cutting tool according to an embodiment of the present invention, and (B) is a side view of the cutting tool. 図３のＡ−Ａ矢視断面図である。It is AA arrow sectional drawing of FIG. 切削角を説明するための模式図である。It is a schematic diagram for demonstrating a cutting angle.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。 Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

鋼板の連続圧延ラインにおけるフラッシュバット溶接を説明するための模式図を図１に示す。フラッシング工程と呼ばれる第一の工程では、電源２０に接続された電極２１を介して印加される電圧により、連設された鋼板１１の端面（先行鋼板の後端面と後行鋼板の先端面）間に連続してアークを発生させる（図１（Ａ）参照）。アークが発生した部分は局部的に溶融し、溶融した金属の一部はスパッターとして外部に放出されるが、残りは鋼板１１の端面に残留する。アークによって溶融した部分にはクレータと呼ばれる凹みが発生する。鋼板１１は徐々に近づけられていき、新たな接触部分にアークが次々に発生し、局部的な溶融の繰返しにより鋼板１１は次第に短くなっていく。
フラッシング工程を数秒から数十秒間継続することにより、鋼板１１の端面の全面が溶融した状態となる。また、鋼板１１の端面近傍は温度上昇により軟化する。この状態に達した時点で、図１（Ｂ）に示すように、鋼板長手方向へ加圧が行われる（アップセット工程）。このアップセットと呼ばれる加圧により、鋼板１１の端面に形成されていたクレータは潰され、端面間に存在していた溶融金属が溶接面の外へ押し出される。軟化した端面近傍は、塑性変形して断面が増大し、溶接面の周囲にはビード２２が形成される。 A schematic diagram for explaining flash butt welding in a continuous rolling line for steel sheets is shown in FIG. In a first process called a flushing process, the voltage applied via the electrode 21 connected to the power source 20 is used to connect between the end faces of the continuous steel plates 11 (the rear end surface of the preceding steel plate and the front end surface of the subsequent steel plate). An arc is generated continuously (see FIG. 1A). The part where the arc is generated melts locally, and a part of the melted metal is released to the outside as spatter, but the rest remains on the end face of the steel plate 11. In the part melted by the arc, a dent called a crater is generated. The steel plate 11 is gradually approached, and arcs are successively generated at new contact portions, and the steel plate 11 is gradually shortened by repeated local melting.
By continuing the flushing process for several seconds to several tens of seconds, the entire end face of the steel plate 11 is melted. Further, the vicinity of the end surface of the steel plate 11 is softened by the temperature rise. When this state is reached, as shown in FIG. 1B, pressurization is performed in the longitudinal direction of the steel sheet (upset process). By this pressurization called upset, the crater formed on the end face of the steel plate 11 is crushed, and the molten metal existing between the end faces is pushed out of the weld face. In the vicinity of the softened end surface, plastic deformation is performed and the cross section increases, and a bead 22 is formed around the weld surface.

フラッシュバット溶接により生じたビード２２は、次工程において、フラッシュトリマ又はビードトリマと呼ばれるビード切削装置（図示省略）により平滑に切削される。
図２（Ａ）、（Ｂ）に、ビード切削装置を構成するバイトホルダ１０の一例を示す。このバイトホルダ１０は大略直方体形状とされ、材軸が鋼板１１に対して略垂直となるようにセットされる。バイトホルダ１０の下部には、進行方向Ｘがわ及び下方に開口する凹陥部１０ａが形成されている。凹陥部１０ａには、すくい角θが５°〜１７°となるように、切削バイト１２が装着される。 In the next step, the bead 22 generated by flash butt welding is cut smoothly by a bead cutting device (not shown) called a flash trimmer or a bead trimmer.
2A and 2B show an example of a bite holder 10 constituting a bead cutting device. The cutting tool holder 10 has a substantially rectangular parallelepiped shape, and is set so that the material axis is substantially perpendicular to the steel plate 11. In the lower part of the bite holder 10, a traveling direction X is formed and a recessed part 10a that opens downward is formed. The cutting tool 12 is attached to the recessed portion 10a so that the rake angle θ is 5 ° to 17 °.

切削バイト１２の形状を図３及び図４に示す。切削バイト１２を正面から見ると、矩形状であり、各コーナー部１２ａにはアールが形成されている（図３（Ａ）参照）。また、切削バイト１２を側面から見ると、略平行四辺形の形をしており、鋭角部が刃部１７、１８となる（図３（Ｂ）参照）。切削バイト１２は、側面視して点対称な形状に形成されており、刃部１７が摩耗した場合、切削バイト１２を側面視して１８０度回転させることにより、刃部１８を使用することができる。なお、切削バイト１２は、炭化タングステンと結合材であるコバルトを混合して焼結させた超硬合金や高速度鋼（高速度工具鋼）などから形成されている。 The shape of the cutting tool 12 is shown in FIGS. When the cutting tool 12 is viewed from the front, the cutting tool 12 has a rectangular shape, and each corner portion 12a has a rounded shape (see FIG. 3A). Further, when the cutting tool 12 is viewed from the side, it has a substantially parallelogram shape, and the acute angle portions become the blade portions 17 and 18 (see FIG. 3B). The cutting tool 12 is formed in a point-symmetric shape when viewed from the side, and when the blade part 17 is worn, the cutting part 12 can be rotated 180 degrees when viewed from the side so that the blade part 18 can be used. it can. The cutting tool 12 is made of cemented carbide, high speed steel (high speed tool steel), or the like obtained by mixing and sintering tungsten carbide and cobalt as a binder.

切削バイト１２の正面及び背面は、それぞれすくい面１３、１４となり、すくい面１３、１４の刃部１７、１８の先端から所定の距離離れた位置に、部分円筒状（側断面視して円弧状）の凹部１５、１６が形成されている。 The front and back surfaces of the cutting tool 12 are rake faces 13 and 14, respectively, at a position away from the tips of the blade portions 17 and 18 of the rake faces 13 and 14 by a predetermined cylindrical shape (circular shape when viewed from a side section). ) Recesses 15 and 16 are formed.

切削バイト１２の両側面部１２ｂにはＶ形の溝部１９が形成されており、バイトホルダ１０に形成された逆Ｖ形の突条部（図示省略）を切削バイト１２の溝部１９に嵌合することにより、切削バイト１２をバイトホルダ１０に装着する。 V-shaped groove portions 19 are formed on both side surface portions 12 b of the cutting tool 12, and inverted V-shaped protrusions (not shown) formed on the cutting tool holder 10 are fitted into the groove portions 19 of the cutting tool 12. Thus, the cutting tool 12 is mounted on the tool holder 10.

凹部１５、１６の大きさ及び位置については最適範囲が存在し、図４に示すように、切削バイト１２を側断面視して、凹部１５、１６の開口幅をＷ、凹部１５、１６の最大深さをＤ、刃部１７、１８の先端から凹部１５、１６の開始点までの距離をＬとすると、Ｗを７ｍｍ〜１５ｍｍ、Ｄを０．５ｍｍ〜２．０ｍｍとする必要がある。また、Ｌは２ｍｍ〜６ｍｍであることが好ましい。 As shown in FIG. 4, there is an optimum range for the sizes and positions of the recesses 15 and 16, and as shown in FIG. If the depth is D, and the distance from the tips of the blades 17 and 18 to the starting points of the recesses 15 and 16 is L, W must be 7 mm to 15 mm, and D must be 0.5 mm to 2.0 mm. L is preferably 2 mm to 6 mm.

なお、凹部１５、１６の側断面が完全な円弧である場合、凹部１５、１６の曲率半径をＲ（ｍｍ）とすると、ＲとＷ及びＤとの間には三平方の定理より次式の関係が成り立つ。
（Ｒ−Ｄ）２＋Ｗ２／４＝Ｒ２ （１）
（１）式より曲率半径Ｒは（２）式のようになる。
Ｒ＝（４Ｄ２＋Ｗ２）／８Ｄ （２） In addition, when the side cross section of the recessed parts 15 and 16 is a perfect circular arc, when the radius of curvature of the recessed parts 15 and 16 is R (mm), the following equation A relationship is established.
(R-D) 2 + W 2/4 = R 2 (1)
From equation (1), the radius of curvature R is as shown in equation (2).
R = (4D 2 + W 2 ) / 8D (2)

凹部の大きさ及び位置をパラメータとして複数の切削バイトを製作し、ビードの切削試験を実施して各切削バイトの評価を行った。試験結果の一覧を表１に示す。なお、試験時のすくい角は９°に固定した。
切削抵抗値は、ビード切削装置に取り付けたロードセルによって測定した。
同表における寿命は、刃先が欠けるまでの日数であり、オンライン切削回数を２００回／日として評価した。
また、切削屑の分断性評価は、切削屑が凹部に引っ掛かるトラブルの回数で評価し、試行回数５０回に対してトラブル回数が１回以下の場合は○、試行回数５０回に対してトラブル回数が２回〜９回の場合は△、試行回数５０回に対してトラブル回数が１０回以上の場合は×とした。 A plurality of cutting tools were manufactured using the size and position of the recesses as parameters, and a bead cutting test was performed to evaluate each cutting tool. Table 1 shows a list of test results. The rake angle during the test was fixed at 9 °.
The cutting resistance value was measured by a load cell attached to a bead cutting device.
The life in the table is the number of days until the cutting edge is missing, and the number of online cuttings was evaluated as 200 times / day.
In addition, the evaluation of the severability of the cutting waste is evaluated by the number of troubles in which the cutting waste is caught in the recesses. Is 2 to 9 times, and Δ is 50 times when the number of troubles is 10 times or more.

Figure 2011218529
Figure 2011218529

実施例１〜８のうち、実施例７、８は、刃部の先端から凹部の開始点までの距離Ｌが２ｍｍ〜６ｍｍの範囲外にある。また、比較例１、２は、凹部の最大深さＤが０．５ｍｍ〜２．０ｍｍの範囲外、比較例３、４は、凹部の開口幅Ｗが７ｍｍ〜１５ｍｍの範囲外にある。
同表より、実施例は全て、切削抵抗が小さく、刃先が欠けるまでの寿命は５〜８日、切削屑の螺旋径は１３ｍｍ〜３３ｍｍ、切削屑の分断性も良好であった。一方、比較例１、４は切削屑の分断性が悪く、比較例２は切削抵抗が大きかった。また、比較例３は、切削屑が凹部に引っ掛かり切削不能となった。 Among Examples 1 to 8, Examples 7 and 8 are such that the distance L from the tip of the blade portion to the start point of the recess is outside the range of 2 mm to 6 mm. In Comparative Examples 1 and 2, the maximum depth D of the recess is outside the range of 0.5 mm to 2.0 mm, and in Comparative Examples 3 and 4, the opening width W of the recess is outside the range of 7 mm to 15 mm.
From the same table, all the examples had low cutting resistance, the life until the cutting edge was chipped was 5 to 8 days, the spiral diameter of the cutting scraps was 13 mm to 33 mm, and the cutting chip splitting was also good. On the other hand, Comparative Examples 1 and 4 had poor cutting severability, and Comparative Example 2 had high cutting resistance. Further, in Comparative Example 3, the cutting waste was caught in the concave portion, and cutting was impossible.

また、切削バイトの凹部の開口幅Ｗを１２ｍｍ、凹部の最大深さＤを１．７ｍｍ、刃部の先端から凹部の開始点までの距離Ｌを５ｍｍとして、すくい角をパラメータとしてビードの切削試験を実施した。試験結果の一覧を表２に示す。
同表より、すくい角が５°未満である比較例５では、切削抵抗が大きく、すくい角が１７°を超える比較例６では、刃先が欠けるまでの寿命が短くなっている。 Also, the cutting width of the cutting tool is 12 mm, the maximum depth D of the recess is 1.7 mm, the distance L from the blade tip to the starting point of the recess is 5 mm, and the rake angle is a parameter. Carried out. Table 2 shows a list of test results.
From the table, in Comparative Example 5 in which the rake angle is less than 5 °, the cutting resistance is large, and in Comparative Example 6 in which the rake angle exceeds 17 °, the life until the cutting edge is chipped is shortened.

Figure 2011218529
Figure 2011218529

以上、本発明の一実施の形態について説明してきたが、本発明は何ら上記した実施の形態に記載の構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。例えば、上記実施の形態では、切削バイトの表裏両面に凹部を形成しているが、一方の面のみに凹部を形成しても良いことは言うまでもない。また、上記実施の形態では、切削バイトは一体物としているが、刃部を別体としてもよい。 Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included. For example, in the above embodiment, the concave portions are formed on both the front and back surfaces of the cutting tool, but it goes without saying that the concave portions may be formed only on one surface. Moreover, in the said embodiment, although the cutting tool is made into the integral thing, it is good also considering a blade part as a different body.

１０：バイトホルダ、１０ａ：凹陥部、１１：鋼板、１２：切削バイト、１２ａ：コーナー部、１２ｂ：側面部、１３、１４：すくい面、１５、１６：凹部、１７、１８：刃部、１９：溝部、２０：電源、２１：電極、２２：ビード DESCRIPTION OF SYMBOLS 10: Tool holder, 10a: Recessed part, 11: Steel plate, 12: Cutting tool, 12a: Corner part, 12b: Side part, 13, 14: Rake face, 15, 16: Recessed part, 17, 18: Blade part, 19 : Groove, 20: power supply, 21: electrode, 22: bead

Claims (3)

鋼板の連続圧延ラインにおいて先行鋼板の後端と後行鋼板の先端とをフラッシュバット溶接した際に生じるビードを切削するビード切削装置に装着される切削バイトにおいて、
側断面視して円弧状の凹部がすくい面に形成され、前記凹部の開口幅が７ｍｍ〜１５ｍｍ、且つ前記凹部の最大深さが０．５ｍｍ〜２．０ｍｍであることを特徴とする切削バイト In a cutting tool attached to a bead cutting device for cutting a bead generated when the rear end of a preceding steel plate and the front end of a subsequent steel plate are flash-butt welded in a continuous rolling line of the steel plate,
A cutting tool characterized in that an arc-shaped recess is formed on a rake face as viewed from a side section, the opening width of the recess is 7 mm to 15 mm, and the maximum depth of the recess is 0.5 mm to 2.0 mm. 請求項１記載の切削バイトにおいて、側断面視して、刃部の先端から前記凹部の開始点までの距離が２ｍｍ〜６ｍｍであることを特徴とする切削バイト。 The cutting tool according to claim 1, wherein the distance from the tip of the blade portion to the starting point of the concave portion is 2 mm to 6 mm in a side sectional view. 請求項１又は２記載の切削バイトが装着され、鋼板の連続圧延ラインにおいて先行鋼板の後端と後行鋼板の先端とをフラッシュバット溶接した際に生じるビードを切削するビード切削装置において、
前記切削バイトのすくい角を５°〜１７°とすることを特徴とするビード切削装置。 In the bead cutting device to which the cutting tool according to claim 1 or 2 is mounted and which cuts a bead generated when flash butt welding the rear end of the preceding steel plate and the front end of the subsequent steel plate in a continuous rolling line of the steel plate,
A bead cutting device characterized in that a rake angle of the cutting bit is set to 5 ° to 17 °.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110582363A (en) * 2017-02-23 2019-12-17 塞姆托尔有限公司 blade of electrode grinding machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5650792A (en) * 1979-09-28 1981-05-08 Mitsubishi Electric Corp Weld bead cutter of flash butt welder for steel strip

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5650792A (en) * 1979-09-28 1981-05-08 Mitsubishi Electric Corp Weld bead cutter of flash butt welder for steel strip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110582363A (en) * 2017-02-23 2019-12-17 塞姆托尔有限公司 blade of electrode grinding machine
CN110582363B (en) * 2017-02-23 2021-04-20 塞姆托尔有限公司 Blade blank of electrode grinding machine

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