WO2017094509A1 - 直線型鋼矢板の継手部成型機及び直線型鋼矢板の製造方法 - Google Patents
直線型鋼矢板の継手部成型機及び直線型鋼矢板の製造方法 Download PDFInfo
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- WO2017094509A1 WO2017094509A1 PCT/JP2016/083957 JP2016083957W WO2017094509A1 WO 2017094509 A1 WO2017094509 A1 WO 2017094509A1 JP 2016083957 W JP2016083957 W JP 2016083957W WO 2017094509 A1 WO2017094509 A1 WO 2017094509A1
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- steel sheet
- sheet pile
- rolling
- linear steel
- pair
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/082—Piling sections having lateral edges specially adapted for interlocking with each other in order to build a wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
Definitions
- the present invention relates to a joint forming machine for a linear steel sheet pile and a method for manufacturing the linear steel sheet pile.
- the rolling of a linear steel sheet pile having an asymmetric shape (hereinafter also referred to as “vertical asymmetry”) perpendicular to the vertical direction in the longitudinal direction and the width direction is generally performed using a special steel slab (BB: beam blank) or rectangular shape. It is often rolled by a double rolling mill using a steel piece (BL: Bloom) as a raw material.
- BB beam blank
- BL steel piece
- the opening width of the joint part fluctuates over the entire length in the longitudinal direction due to the wear of the roll, the rolling temperature over the entire length in the longitudinal direction of the rolled material, the change in rolling load due to the reduction adjustment, etc. May not be obtained.
- Patent Documents 1 to 4 as a method of rolling a linear steel sheet pile having a shape that is symmetrical with respect to the vertical direction (hereinafter also referred to as “vertical symmetry”), There is disclosed a method for fitting the attached scissors roll into the opening of the joint. According to Patent Documents 1 to 4, while the protrusions of the rolls of the universal rolling mill are fitted into the openings, the claws of the joint are finally bent, thereby ensuring the centering property of the rolled material, The moldability of the joint can be improved.
- the present invention has been made paying attention to the above-described problem, and can improve the dimension controllability and shape moldability of the joint part of the linear steel sheet pile, and the linear steel sheet pile joint part molding machine and the straight line It aims at providing the manufacturing method of a type steel sheet pile.
- a double type of rolling a vertically asymmetric linear steel sheet pile having a web portion extending in the width direction and joint portions each having two claws formed at both ends of the web portion.
- the pair of web guide rollers Is provided on the downstream side of the linear steel sheet pile in the rolling direction, and protrudes radially outward and can be fitted into an opening formed between the tips of the two claws.
- a linear steel sheet pile joint part molding machine comprising a pair of molding guide rollers that are provided at the center in the vertical direction perpendicular to the width direction and abut against the joint part from the outside in the width direction. Is done.
- a vertically asymmetric linear steel sheet pile having a web portion extending in the width direction and joint portions each having two claws formed at both ends of the web portion is double-rolled.
- the linear steel sheet pile is provided on the exit side of the rolling roll on which the final forming rolling is performed, and is rolled.
- the centering property of the linear steel sheet pile is ensured, and provided more downstream in the rolling direction of the linear steel sheet pile than the pair of web guide rollers.
- the width of the joint A pair molded guide rollers abutting each from the outer direction, method for producing linear steel sheet pile, characterized in that to respectively abut the outer side of the width direction in the joint portion is provided.
- a joint forming machine for a linear steel sheet pile and a method for manufacturing the linear steel sheet pile that can improve the dimensional controllability and shape moldability of the joint of the linear steel sheet pile. it can.
- the linear steel sheet pile 1 includes a web portion 11 extending in the width direction (left and right direction with respect to the paper surface of FIG. 1), and a pair of joint portions 12 a and 12 b at both ends in the width direction.
- the joint portions 12a and 12b have an asymmetric shape that is asymmetric with respect to the vertical direction (vertical direction with respect to the paper surface of FIG. 1) perpendicular to the width direction and the longitudinal direction (front and rear direction with respect to the paper surface of FIG. 1).
- the joint portions 12a and 12b have two claws, namely, main claws 121a and 121b formed on the lower side and curved in the width direction, and sub claws 122a and 122b formed on the upper side and curved in the width direction. Openings 123a and 123b are formed between the tips of the main claws 121a and 121b and the tips of the sub claws 122a and 122b, respectively.
- the length of the width direction of the linear steel sheet pile 1 is called full width A
- the length of the opening parts 123a and 123b in the up-down direction is called opening width B.
- Such a linear steel sheet pile 1 is required to have high accuracy in size and shape.
- the joint portions 12a and 12b are required to have high accuracy in size and shape from the viewpoint of workability during use.
- the dimensions and shapes of the portions 12a and 12b change over the entire length.
- the variation in the opening width B becomes a problem from the viewpoint of workability. For example, even when the opening width B is wider on the front end side in the longitudinal direction, the opening width B may be narrower on the tail end side depending on the rolling conditions.
- FIG. 2A shows an example in which the actual opening width B1 becomes narrower than the target opening width B indicated by the alternate long and short dash line due to excessive bending of the main claws 121a and the sub claws 122a. .
- FIG. 2B shows an example in which the actual opening width B1 becomes wider than the target opening width B indicated by the alternate long and short dash line due to insufficient bending of the secondary claw 122a and deformation of the main claw 121a. Show. Also in FIG.
- the actual opening width B1 is too wide, the fitting property may be deteriorated during construction.
- the actual full width A1 may be larger than the target full width A, which may be out of the upper limit. For this reason, in manufacturing the linear steel sheet pile 1, it is important to improve the accuracy of the dimensions and shapes of the joint portions 12a and 12b.
- the rolling equipment includes a heating furnace 2, a rough rolling mill 3, an intermediate rolling mill 4, and a finish rolling mill 5.
- the heating furnace 2 is a heating facility that heats a rectangular steel piece, which is a rolled material, to a predetermined temperature.
- the rough rolling mill 3 is a double rolling mill having one mill (a pair of rolls), and calibers K12 to K10, which are three hole types, are provided side by side in the longitudinal direction. As will be described later, each caliber K12 to K10 has a shape that can be rolled into a target cross-sectional shape in the rough rolling step.
- the intermediate rolling mill 4 is a double tandem rolling mill having two mills 4a and 4b.
- the mill 4a is provided with three calibers K9, K6, and K5
- the mill 4b is provided with three calibers K8, K7, and K4 side by side in the longitudinal direction, like the roughing mill 3.
- each of the calibers K9 to K4 has a shape such that the rolled material has a target cross-sectional shape in the intermediate rolling process.
- the finish rolling mill 5 is a double rolling mill having an upper roll 51a and a lower roll 51b which are one mill, and is provided at three locations on the upper roll 51a and the lower roll 51b.
- Calibers K3, K2, and K1 are provided. As will be described later, each of the calibers K3 to K1 has a shape that can be rolled into a target cross-sectional shape in the finish rolling step.
- the finish rolling mill 5 includes six pairs of side guides 52a to 52l, a pair of web guides 53a and 53b, and a joint portion molding machine 6.
- the six pairs of side guides 52a to 52l are provided on the entry side or the exit side in the rolling direction of the upper roll 51a and the lower roll 51b corresponding to each caliber K3, K2, K1.
- the side guides 52a and 52b are the entry side of the caliber K3
- the side guides 52c and 52d are the exit side of the caliber K3
- the side guides 52e and 52f are the entry side of the caliber K2
- the side guides 52g and 52h are the exit side of the caliber K2.
- 52i and 52j are provided on the entry side of the caliber K1
- side guides 52k and 52l are provided on the exit side of the caliber K1, respectively.
- the pair of web guides 53a and 53b are provided opposite to each other in the vertical direction on the exit side of the caliber K1 where final molding and rolling described later is performed and between the pair of side guides 52k and 52l.
- the front end of the web guide 53a on the upstream side in the rolling direction is disposed so as to contact the upper roll 51a
- the front end of the web guide 53b on the upstream side in the rolling direction is disposed so as to contact the lower roll 51b.
- the pair of web guides 53a and 53b prevents sticking to the upper roll 51a or the lower roll 51b of the linear steel sheet pile 1 which is a rolled material formed and rolled by the caliber K1, and sticks to the upper roll 51a or the lower roll 51b.
- the connected linear steel sheet pile 1 is peeled off from the upper roll 51a or the lower roll 51b.
- the joint part molding machine 6 includes a pair of web guide rollers 61a and 61b and a pair of molding guide rollers 62a and 62b.
- the pair of web guide rollers 61a and 61b are rolls whose rotational axes are arranged in parallel to the width direction.
- the pair of web guide rollers 61a and 61b are provided in the pair of web guides 53a and 53b, respectively, separated in the vertical direction.
- the pair of web guide rollers 61a and 61b are separated from each other by a predetermined distance at a predetermined height so as to ensure the centering property that is the positional accuracy in the vertical direction of the straight steel sheet pile 1 to be passed. Are provided respectively.
- the pair of molding guide rollers 62a and 62b are rolls whose rotating shafts are arranged in parallel in the vertical direction.
- the pair of molding guide rollers 62a and 62b are provided in the pair of side guides 52k and 52l, respectively, spaced downstream in the rolling direction from the pair of web guide rollers 61a and 61b in the rolling direction.
- the pair of molding guide rollers 62a and 62b is provided so as to be movable in the width direction by a moving mechanism (not shown) provided in the pair of side guides 52k and 52l.
- the pair of molding guide rollers 62a and 62b has projecting portions 621a and 621b projecting radially outward at the center in the vertical direction.
- the vertical width and the protruding length of the protruding portions 621a and 621b are the shapes and dimensions of the target joint portions 12a and 12b (opening width B, main claws 121a and 121b, and sub claws 122a, 122b shape / dimension).
- the upper and lower surfaces sandwiching the protrusions 621a and 621b of the pair of molding guide rollers 62a and 62b have a curved shape according to the shape and dimensions of the target joint portions 12a and 12b.
- the heated rectangular steel slab BL is conveyed as a rolling material to the rough rolling mill 3 and rough rolled by the rough rolling mill 3 (rough rolling process).
- the rolled material is sequentially rolled by the calibers K12 to K10 of the rough rolling mill 3.
- the rolled material is rolled a plurality of times (pass) by each caliber K12 to K10.
- the above-described rough rolling is performed, so that the cross-sectional shape of the rolled material perpendicular to the longitudinal direction changes in order as shown in FIG.
- the roughly rolled material is conveyed to the intermediate rolling mill 4 and subjected to intermediate rolling by the intermediate rolling mill 4 (intermediate rolling process).
- the intermediate rolling process as shown in FIG. 3, the rolled material is rolled in order by calibers K9 to K4 of the intermediate rolling mill 4.
- the cross-sectional shape of a rolling material changes in order.
- the intermediate rolled material is conveyed to the finish rolling mill 5 and finish-rolled by the finish rolling mill 5 (finish rolling process).
- the finish rolling process as shown in FIG. 3
- the rolled material is rolled in order by calibers K3 to K1 of the finish rolling mill 5.
- the cross-sectional shape of a rolling material changes in order.
- the joint portions 12a and 12b of the linear steel sheet pile 1 which is a rolled material that has been subjected to final forming and rolling by the finish rolling mill 5 are molded by the joint portion molding machine 6 (joint portion molding step).
- the linear steel sheet pile 1 rolled by the caliber K1 of the finishing mill 5 is conveyed to the pair of web guide rollers 61a and 61b through the pair of web guides 53a and 53b.
- the web portion 11 of the linear steel sheet pile 1 passes between the pair of web guide rollers 61a and 61b so that the linear steel sheet pile 61 1 centering property is ensured.
- the linear steel sheet pile 1 that has passed through the pair of web guide rollers 61a and 61b is then conveyed to the pair of forming guide rollers 62a and 62b.
- the pair of molding guide rollers 62a and 62b is adjusted in advance so that the interval between the molding guide rollers 62a and 62b is a predetermined interval (for example, an interval corresponding to the target full width A).
- the joint portion 12a is in a state in which the projections 621a and 621b of the pair of molding guide rollers 62a and 62b are fitted in the openings 123a and 123b of the linear steel sheet pile 1 to be conveyed.
- 12b abut against a pair of molding guide rollers 62a, 62b, respectively.
- the opening width B is narrow due to excessive bending of the main claws 121a and 121b and the sub claws 122a and 122b
- the opening width B is expanded to the target width by fitting the protrusions 621a and 621b. be able to.
- the main claws 121a and 121b and the sub claws 122a and 122b are insufficiently bent or deformed, they contact the upper and lower regions of the protruding portions 621a and 621b of the pair of molding guide rollers 62a and 62b.
- the main claws 121a and 121b and the sub claws 122a and 122b are corrected to target shapes.
- the target opening width B can be corrected.
- the dimensional controllability and shape moldability of the joint portions 12a and 12b of the linear steel sheet pile 1 can be improved through the rough rolling step, the intermediate rolling step, the finish rolling step, and the joint portion forming step. .
- the linear steel sheet pile 1 which was excellent in the precision of the dimension and shape of joint part 12a, 12b can be manufactured.
- the pair of molding guide rollers 62a and 62b is configured to be movable in the width direction, but the present invention is not limited to such an example.
- the pair of molding guide rollers 62a and 62b may be fixed so as not to move in the width direction.
- the pair of molding guide rollers 62a and 62b is not moved in the width direction in the joint part molding step, but the present invention is not limited to this example.
- the pair of molding guide rollers 62a and 62b are moved in the width direction in the joint portion molding process in accordance with the shape change in the longitudinal direction. You may let them.
- a pair of forming guide rollers is obtained from the shape and dimensions after the joint portion forming step of the linear steel sheet pile 1 rolled first. The timing and amount of movement for moving 62a and 62b may be determined.
- interval according to the full width A made into the target was set as the space
- this invention is not limited to this example.
- a pair of moldings is performed according to the track record of shape and dimensions under similar rolling conditions.
- the interval between the guide rollers 62a and 62b may be adjusted.
- the joint part molding machine 6 of the linear steel sheet pile 1 includes a web part 11 extending in the width direction and two claws (main claws 121a and 121b formed at both ends of the web part 11. And a rolling roll on which the final forming and rolling of the double rolling mill (finishing mill 5) for rolling the vertically asymmetric linear steel sheet pile 1 having the joint portions 12a and 12b each having the double claws 122a and 122b) is performed.
- b a a in the middle of the perpendicular vertical to the width direction of the rolling direction and the linear sheet pile 1 comprises joint portions 12a, molded guide roller 62a of the pair abutting each from the outside in the width direction 12b, and the 62b.
- the pair of molding guide rollers 62a and 62b is configured to be movable in the width direction. According to the configuration of (2) above, it is possible to correspond to the linear steel sheet piles 1 having various full widths A. Moreover, according to the rolling performance of the other linear steel sheet pile 1, the space
- the pair of molding guide rollers 62a and 62b is fixed so as not to move in the width direction when the linear steel sheet pile 1 passes through.
- the opening width B is set to the lower limit value by setting the interval between the pair of molding guide rollers 62a and 62b so that the opening width B does not deviate from the target lower limit value.
- the linear steel sheet pile 1 can be rolled stably so as not to deviate.
- the manufacturing method of the linear steel sheet pile 1 which concerns on 1 aspect of this invention is the web part 11 extended in the width direction, and two nail
- the vertical asymmetrical linear steel sheet pile 1 having joint portions 12a and 12b having 122a and 122b) is rolled using a double rolling mill (finishing mill 5)
- the final of the double rolling mill A pair of web guides provided on the exit side of the rolling roll (upper roll 51a and lower roll 51b) in which the final shaping rolling is performed after the forming rolling and sandwiching the web portion 11 of the linear steel sheet pile 1 to be rolled.
- the rollers 61a and 61b are used to secure the centering property of the linear steel sheet pile 1, and are provided downstream of the pair of web guide rollers 61a and 61b in the rolling direction of the linear steel sheet pile 1 and project radially outward.
- Protrusions 621a, 621b that can be fitted into openings 123a, 123b formed between the tips of two claws are provided at the center in the vertical direction perpendicular to the rolling direction and the width direction of the linear steel sheet pile 1, and the joints 12a, 12b is brought into contact with each other from the outside in the width direction. According to the configuration of (4) above, the same effect as the configuration of (1) can be obtained.
- the rolling equipment shown in FIG. 3 including the joint part molding machine 6 according to the above embodiment is used to roll the vertically asymmetric linear steel sheet pile 1 at a plurality of locations over the entire length of the rolled linear steel sheet pile 1.
- the total width A and the opening width B were measured.
- the linear steel sheet pile 1 is rolled under the same conditions as in the embodiment using the rolling equipment without the joint forming machine 6 in the rolling equipment shown in FIG.
- the total width A and opening width B were measured at the locations.
- Table 1 shows the measurement results in the examples.
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Abstract
Description
このような問題に対して、圧延する際に圧延材の温度を長手方向全長にわたって均一にすることや、ロールの摩耗を発生させないように圧延することが望ましいが、現実的には困難となる。
<直線型鋼矢板>
はじめに、図1~図3を参照して、本発明の一実施形態において圧延される直線型鋼矢板1について説明する。直線型鋼矢板1は、図1に示すように幅方向(図1の紙面に対する左右方向)に延在するウェブ部11と、幅方向の両端側に1対の継手部12a,12bとを有する。継手部12a,12bは、幅方向及び長手方向(図1の紙面に対する前後方向)に垂直な上下方向(図1の紙面に対する上下方向)に対して非対称な、上下非対称の形状を有する。継手部12a,12bは、下側に形成され幅方向に対して湾曲した主爪121a,121bと、上側に形成され幅方向に対して湾曲した副爪122a,122bとの2つの爪を有する。主爪121a,121bの先端と副爪122a,122bの先端との間には、開口部123a,123bがそれぞれ形成される。また、直線型鋼矢板1の幅方向の長さを全幅Aといい、開口部123a,123bの上下方向の長さを開口幅Bという。
次に、図3~図7を参照して、本実施形態の圧延設備について説明する。圧延設備は、図3に示すように、加熱炉2と、粗圧延機3と、中間圧延機4と、仕上圧延機5とを備える。
加熱炉2は、圧延材である矩形鋼片を所定の温度まで加熱する加熱設備である。
1対のウェブガイドローラ61a,61bは、回転軸が幅方向に平行に配されるロールである。1対のウェブガイドローラ61a,61bは、上下方向に離隔して、1対のウェブガイド53a,53b内にそれぞれ設けられる。なお、1対のウェブガイドローラ61a,61bは、後述するように、通材する直線型鋼矢板1の上下方向の位置精度であるセンタリング性を確保できるように、所定の高さに所定距離だけ離間してそれぞれ設けられる。
次に、図3及び図8を参照して、本実施形態に係る直線型鋼矢板1の製造方法について説明する。
本実施形態では、まず、加熱炉2で矩形鋼片BLが所定の温度まで加熱される。
その後、中間圧延された圧延材が仕上圧延機5に搬送され、仕上圧延機5にて仕上圧延される(仕上圧延工程)。仕上圧延工程では、図3に示すように、仕上圧延機5のカリバーK3~K1にて圧延材が順に圧延される。これにより、図8に示すように、圧延材の断面形状が順に変化する。
以上のように、粗圧延工程、中間圧延工程、仕上圧延工程及び継手部成型工程を経ることで、直線型鋼矢板1の継手部12a,12bの寸法制御性及び形状成型性を向上させることができ。このため、継手部12a,12bの寸法・形状の精度が優れた直線型鋼矢板1を製造することができる。
以上で、特定の実施形態を参照して本発明を説明したが、これら説明によって発明を限定することを意図するものではない。本発明の説明を参照することにより、当業者には、開示された実施形態の種々の変形例とともに本発明の別の実施形態も明らかである。従って、特許請求の範囲は、本発明の範囲及び要旨に含まれるこれらの変形例または実施形態も網羅すると解すべきである
また、上記実施形態では、継手部成型工程において1対の成型ガイドローラ62a,62bは幅方向に移動しないとしたが、本発明はかかる例に限定されない。例えば、直線型鋼矢板1の長手方向で継手部12a,12bの形状が一定でない場合、長手方向の形状変化に応じて、継手部成型工程において1対の成型ガイドローラ62a,62bを幅方向に移動させてもよい。この場合、例えば、同様な圧延条件の圧延材が連続して圧延される場合には、初めに圧延された直線型鋼矢板1の継手部成型工程後の形状や寸法から、1対の成型ガイドローラ62a,62bを移動させるタイミング及び移動量が決定されてもよい。
さらに、上記実施形態では、図3及び図4に示す圧延設備及び圧延方法を用いて直線型鋼矢板1を圧延するとしたが、仕上圧延後の直線型鋼矢板1の形状が上下非対称なものであれば、粗圧延工程から仕上圧延工程までに用いられる圧延設備や圧延回数については他の条件が用いられてもよい。
(1)本発明の一態様に係る直線型鋼矢板1の継手部成型機6は、幅方向に延在するウェブ部11と、ウェブ部11の両端に形成され2つの爪(主爪121a,121b及び複爪122a,122b)をそれぞれ有する継手部12a,12bとを有する上下非対称な直線型鋼矢板1を圧延する二重式圧延機(仕上圧延機5)の最終成型圧延が行われる圧延ロール(上ロール51a及び下ロール51b)の出側に設けられ、圧延される直線型鋼矢板1のウェブ部11を挟んで設けられる1対のウェブガイドローラ61a,61bと、1対のウェブガイドローラ61a,61bよりも直線型鋼矢板1の圧延方向の下流側に設けられ、径方向外方に突出し2つの爪の先端間に形成される開口部123a,123bに嵌入可能な突出部621a,621bを圧延方向及び直線型鋼矢板1の幅方向に垂直な上下方向の中央に有し、継手部12a,12bに幅方向の外側からそれぞれ当接する1対の成型ガイドローラ62a,62bとを備える。
上記(2)の構成によれば、様々な全幅Aの直線型鋼矢板1に対応することができる。また、他の直線型鋼矢板1の圧延実績に応じて、1対の成型ガイドローラ62a,62bの間隔を調整することができ、より高い寸法制御性及び形状成型性を実現することができる。
上記(3)の構成によれば、例えば、1対の成型ガイドローラ62a,62bの間隔を、開口幅Bが目標の下限値を外れないような間隔とすることで、開口幅Bが下限値を外れないように安定して直線型鋼矢板1を圧延することができる。
上記(4)の構成によれば、上記(1)の構成と同様な効果を得ることができる。
11 ウェブ部
12a,12b 継手部
121a,121b 主爪
122a,122b 副爪
123a,123b 開口部
2 加熱炉
3 粗圧延機
4 中間圧延機
4a,4b ミル
5 仕上圧延機
51a 上ロール
51b 下ロール
52a~52l サイドガイド
53a,53b ウェブガイド
6 継手部成型機
61a,61b ウェブガイドローラ
62a,62b 成型ガイドローラ
K1~K13 カリバー
Claims (4)
- 幅方向に延在するウェブ部と、該ウェブ部の両端に形成され2つの爪をそれぞれ有する継手部とを有する上下非対称な直線型鋼矢板を圧延する二重式圧延機の最終成型圧延が行われる圧延ロールの出側に設けられ、圧延される前記直線型鋼矢板の前記ウェブ部を挟んで設けられる1対のウェブガイドローラと、
前記1対のウェブガイドローラよりも前記直線型鋼矢板の圧延方向の下流側に設けられ、径方向外方に突出し前記2つの爪の先端間に形成される開口部に嵌入可能な突出部を前記圧延方向及び前記直線型鋼矢板の幅方向に垂直な上下方向の中央に有し、前記継手部に前記幅方向の外側からそれぞれ当接する1対の成型ガイドローラと
を備えることを特徴とする直線型鋼矢板の継手部成型機。 - 前記1対の成型ガイドローラは、前記幅方向に移動可能に構成されることを特徴とする請求項1に記載の直線型鋼矢板の継手部成型機。
- 前記1対の成型ガイドローラは、前記直線型鋼矢板が通過する際には、前記幅方向に移動しないように固定されることを特徴とする請求項1または2に記載の直線型鋼矢板の継手部成型機。
- 幅方向に延在するウェブ部と、該ウェブ部の両端に形成され2つの爪をそれぞれ有する継手部とを有する上下非対称な直線型鋼矢板を、二重式圧延機を用いて圧延して製造する際に、
前記二重式圧延機の最終成型圧延の後、前記最終成型圧延が行われる圧延ロールの出側に設けられ、圧延される前記直線型鋼矢板の前記ウェブ部を挟んで設けられる1対のウェブガイドローラを用いて、前記直線型鋼矢板のセンタリング性を確保し、
前記1対のウェブガイドローラよりも前記直線型鋼矢板の圧延方向の下流側に設けられ、径方向外方に突出し前記継手部の2つの爪の先端間に形成される開口部に嵌入可能な突出部を前記圧延方向及び前記直線型鋼矢板の幅方向に垂直な上下方向の中央に有し、前記継手部に前記幅方向の外側からそれぞれ当接する1対の成型ガイドローラを、前記継手部に前記幅方向の外側からそれぞれ当接させることを特徴とする直線型鋼矢板の製造方法。
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JPH04123811A (ja) * | 1990-09-10 | 1992-04-23 | Nippon Steel Corp | 形鋼圧延用誘導装置 |
JPH09216001A (ja) * | 1996-02-08 | 1997-08-19 | Nippon Steel Corp | 連続継手型形鋼の圧延方法 |
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