WO2005092531A1 - Procédé de fabrication de tubes et dispositif pour laminage à diamètre fixe - Google Patents

Procédé de fabrication de tubes et dispositif pour laminage à diamètre fixe Download PDF

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Publication number
WO2005092531A1
WO2005092531A1 PCT/JP2005/005198 JP2005005198W WO2005092531A1 WO 2005092531 A1 WO2005092531 A1 WO 2005092531A1 JP 2005005198 W JP2005005198 W JP 2005005198W WO 2005092531 A1 WO2005092531 A1 WO 2005092531A1
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WO
WIPO (PCT)
Prior art keywords
rolling
pipe
tube
stands
radius
Prior art date
Application number
PCT/JP2005/005198
Other languages
English (en)
Japanese (ja)
Inventor
Takateru Inage
Tatsuya Okui
Original Assignee
Sumitomo Metal Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries, Ltd. filed Critical Sumitomo Metal Industries, Ltd.
Priority to EP05721298A priority Critical patent/EP1731234B1/fr
Priority to JP2006511469A priority patent/JP4650747B2/ja
Publication of WO2005092531A1 publication Critical patent/WO2005092531A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like

Definitions

  • the present invention relates to the generation or development of wrinkles that can be generated on the inner surface of a pipe when the pipe is subjected to constant-diameter rolling by a constant-diameter rolling device provided with a plurality of grooved rolls of two or more on each stand.
  • TECHNICAL FIELD The present invention relates to a method for producing a pipe and a constant-diameter rolling device capable of effectively suppressing squeezing. Background art
  • a constant-diameter rolling device such as a sizer or a stretch reducer is used.
  • a sizing machine is a three-roll sizing machine in which each stand is provided with three grooved rolling rolls (hereinafter referred to as “rolling rolls” as appropriate) having an angle of 120 ° in a rolling direction. It has been known.
  • a four-roll type constant diameter rolling machine provided with four grooved rolling rolls having an angular force of 90 ° in a rolling direction in each stand.
  • a two-roll type constant-diameter rolling device including two grooved rolling rolls facing each stand is also known.
  • a drive shaft for an automobile is an important safety component that transmits torque of a rotating shaft of an engine to a tire, it is necessary to ensure sufficient fatigue resistance. Therefore, when a pipe is used as a drive shaft for an automobile, it is necessary to minimize wrinkle-like irregularities (hereinafter referred to as “wrinkles”) on the inner surface of the pipe, which significantly reduces the fatigue resistance of the pipe.
  • the wrinkles occur frequently in the step of finishing the pipe outer diameter to a predetermined value in the pipe manufacturing process.
  • the reason for this is considered to be that the sizing mill rolls the sizing of the tube without using a tool to restrain the inner surface of the tube, so that the inner surface of the tube is likely to be wrinkled.
  • the present invention has been made to solve such a problem of the prior art. It is based on newly discovered findings. In other words, the occurrence or progress of wrinkling of the tube in the constant diameter rolling process is based on the reduction ratio (outside diameter reduction) of the entire tube up to the input-side force output side of the constant-diameter rolling device equipped with a plurality of stands. Has a significant effect.
  • the method of restricting the upper limit of the outer diameter working ratio while applying force is that when one kind of constant diameter rolling mill produces many kinds of pipes, it is necessary to prepare raw pipes of various kinds of outside diameters accordingly. There is. In other words, there is a problem that production efficiency deteriorates.
  • the inventors of the present invention conducted further intensive studies and found that the radius of curvature of the inner surface at the position corresponding to the edge of the pipe, the average inner radius of the pipe (the average value of the minor axis and the major axis), and the depth of wrinkles We have found that there is a certain relationship between them.
  • a plurality of stands each having a plurality of grooved rolling rolls in each stand.
  • the ratio of the radius of curvature of the inner surface at the position corresponding to the edge of the pipe to the average inner radius at all stands is 0.55 or more when the pipe is sized by a constant-diameter rolling device consisting of It has been found that, if the rolling is performed under the following conditions, the generation or development of wrinkles that may occur on the inner surface of the pipe can be effectively suppressed even when the outer diameter working ratio is 50% or more.
  • the “average value of the ratio of the radius of curvature of the inner surface at the position corresponding to the edge of the pipe to the average inner radius at all stands” means the radius of curvature of the inner surface at the position corresponding to the edge of the pipe on the exit side of each stand. The value of the ratio to the inner radius is averaged over all stands.
  • the inventors of the present invention have found that wrinkles are intensively generated or developed at a position corresponding to an edge portion of a pipe due to the oval profile of the die roll.
  • the shape of the hole has a hole shape closer to a perfect circle, and as described above, the ratio of the radius of curvature of the inner surface at the position corresponding to the edge of the pipe to the average inner radius in all stands
  • the conditions of the grooved rolls having an average value of 0.55 or more were studied diligently.
  • the inventors of the present invention draw a tangent to each of the opposing edges of the grooved rolls adjacent to each other at each stand, and determine the minimum value of the angle formed by the tangents at all stands in the constant diameter rolling mill.
  • the present inventors have found that it suffices to specify the ratio in accordance with the ratio between the wall thickness and the outer diameter of the tube on the outlet side, and have completed the present invention.
  • the present invention is a method for producing a tube, comprising a step of sizing a tube using a sizing machine having a plurality of stand rolls each provided with a plurality of grooved rolling rolls and having a plurality of stand forces.
  • a tangent line is drawn on each of the opposing edges of the grooved rolls adjacent to each other, and the minimum value of the angle formed by the tangent line at all stands is i8 (deg)
  • 8 satisfies the following equation (1).
  • An object of the present invention is to provide a method for producing a tube, characterized by using a roll.
  • the tube can The compressive force applied to the position corresponding to the edge of is reduced (dispersed).
  • the average value of the ratio of the radius of curvature of the inner surface at the position corresponding to the edge of the pipe to the average inner radius at all stands can be set to 0.55 or more. It is possible to effectively suppress the generation or progress of wrinkles that may occur on the surface.
  • the present invention is also a constant diameter rolling device including a plurality of stands each having a plurality of grooved rolling rolls on each stand, wherein opposing edges of the grooved rolling rolls adjacent to each other in each stand.
  • the minimum value of the angle formed by the tangents at all stands is i8 (deg)
  • the outer diameter of the pipe at the exit side of the constant-diameter rolling device is D (mm)
  • the constant-diameter rolling device is When the wall thickness of the pipe on the delivery side is t (mm), the angle
  • FIG. 1 is a view schematically showing a three-roll type constant diameter rolling apparatus to which a pipe manufacturing method according to an embodiment of the present invention is applied.
  • Figure 2 shows the average value of the ratio of the radius of curvature of the inner surface at the position corresponding to the edge of the pipe to the average inner radius at all stands when the outer diameter of the pipe is 50% or more.
  • 4 is a graph showing the relationship between the depth of a wrinkle generated on the inner surface of a pipe.
  • FIG. 3 is an explanatory diagram for explaining an angle formed by a tangent drawn to an edge portion of a grooved roll.
  • Fig. 4 shows the ratio between the wall thickness t and the outer diameter D at the outlet of the sizing mill at the angle
  • 6 is a graph showing the relationship between the ratio of the radius of curvature of the inner surface at the position corresponding to the edge portion to the average inner radius at all stands.
  • Fig. 5 is a graph showing the relationship between the degree of outer diameter reduction of a constant diameter rolling machine and the maximum depth of wrinkles generated on the inner surface of a rolled pipe.
  • FIG. 6 is a diagram schematically showing a groove profile of a grooved roll according to the present embodiment.
  • FIG. 7 is a view partially showing a groove profile of a grooved roll according to another embodiment of the present invention.
  • FIG. 1 is a view schematically showing a three-roll type constant diameter rolling apparatus to which a pipe manufacturing method according to an embodiment of the present invention is applied.
  • a plurality of (N pieces, in this embodiment, N 17 in this embodiment) a sizing rolling device (a stretch reducer for performing hot sizing rolling in this embodiment) 1 according to this embodiment.
  • Stands # 1 to #N are provided with three grooved rolls 10 each having an angle of 120 ° in the rolling direction, and the rolling direction of the rolling rolls 10 is shifted by 60 ° between adjacent stands. They are arranged alternately.
  • the pipe P to be rolled is inserted into the groove formed by each rolling roll of each stand, and is rolled to a predetermined diameter so that the outer diameter becomes a predetermined value on the exit side of the final stand #N.
  • the rolling roll 10 of each stand has an outer diameter defined by the following equation (2), where Di is the outer diameter of the pipe P on the inlet side of the constant diameter rolling mill 1 and D is the outer diameter of the outlet side. The dimensions and installation position are set so that the degree of processing can be achieved.
  • Fig. 2 shows that all the stands of the ratio of the radius of curvature of the inner surface at the position corresponding to the edge portion of the pipe ⁇ to the average inner radius when the outer diameter is 50% or more are # 1 to ##. 6 is a graph showing the results of an investigation by the inventors of the present invention on the relationship between the average value a of the above and the depth of wrinkles generated on the inner surface of the pipe P. More specifically, the graph shown in FIG. 2 shows that a carbon steel pipe having an outer diameter of 100 mm and a wall thickness of 11 mm was removed while variously changing the conditions of a groove profile of a grooved rolling roll 10 provided in each stand. All stands with a ratio of the radius of curvature of the inner surface at the position corresponding to the edge of the pipe p to the average inner radius when the diameter is reduced to 40 mm and the thickness is reduced to 9.6 mm.
  • the average value a is obtained by measuring the radius of curvature and the average inner radius of the inner surface at the position corresponding to the edge of the pipe P on the exit side of each stand using a three-dimensional shape measuring instrument (manufactured by Tokyo Seimitsu Co., Ltd.). It is a value obtained by averaging the ratio of both calculated for each stand exit side based on the measured value over the number of all stands.
  • the average value a is a value obtained by the following procedure (a)-(c).
  • the center of gravity of the inner surface of the tube P is first determined. Calculate the position. Then, the inner surface of the pipe P at a position corresponding to the flange portion of the grooved roll (i.e., the inner surface of the tube P at a position corresponding to the intermediate position of the gap between the opposing edges of the adjacent rolls) Using the coordinates of (the part) and the coordinates of each inner surface part of the pipe P located at about 5 ° around the center of gravity calculated from the part, the radius of a circle passing through these three parts is calculated.
  • the calculated radius is used as the radius of curvature of the inner surface at the position corresponding to the edge.
  • the distance between the center of gravity and each part constituting the inner surface of the pipe P is defined as an inner radius
  • the average value of the inner radii along the circumferential direction of the pipe P is defined as an average inner radius.
  • the wrinkle depth shown in Fig. 2 means the maximum value of the wrinkle depth of the pipe P measured at the exit side of the constant diameter rolling device 1, and a part of the pipe P after rolling is cut out as a sample. This is a value measured by microscopic observation of the cross section.
  • the rolling rolls 10 are arranged so that ⁇ of the pipe rolled by the sizing mill 1 is 0.55 or more. I have.
  • the reason for setting the conditions of the rolling roll 10 and the setting conditions will be specifically described.
  • a tangent line La (tangent line of the grooved profile near the edge portion Ea) La is drawn to the edge portion Ea of one of the rolling rolls 10a provided in each stand, and is next to the rolling roll 10a.
  • the tangent (tangent to the hole-shaped profile near the edge Eb) Lb is drawn to the edge Eb facing the edge Ea, and the angle j8o formed by both tangents La and Lb is calculated.
  • the groove profile of each rolling roll 10 according to the present embodiment is such that the groove bottom C force of the rolling roll 10 is located outside the center of the groove shape (the center of the rolling pass line).
  • Radius circle with center O 'offset (offset amount S) It has an arc, and has a shape in which the arc directly intersects the flange side wall surface F of the rolling roll 10.
  • the edge E of the rolling roll 10 (that is, the end of the groove profile PR) corresponds to the end of the arc having the radius R.
  • 8 ⁇ are geometrically calculated based on the hole profile (three angles
  • the minimum value of all the stands # 1 to # ⁇ at the angle j8 ⁇ is
  • ⁇ , tZD and ⁇ are The relationship shown in Fig. 4 helped.
  • the horizontal axis in Fig. 4 indicates tZD (%) and the vertical axis indicates j8 (deg) .
  • the data plotted with ⁇ ⁇ '' indicates that the ⁇ of the rolled pipe P was 0.55.
  • the data plotted as “see” indicates that the ⁇ of the rolled tube ⁇ was greater than 0.55, and the data plotted as “X” indicates that the ⁇ was less than 0.55. .
  • 73deg is data obtained when a carbon steel pipe with an outer diameter of 100mm and a wall thickness of 11mm was rolled to a constant diameter of 9.6mm and an outer diameter of 40mm under the conditions shown in Table 2 below. That is, under the conditions shown in Table 2, the minimum value
  • 8 at all stands # 1 and # 17 of the angle j8 o is 173 deg, and the tZD at the exit of the constant diameter rolling mill 1 (that is, the exit of the # 17 stand). 24.0%, so it will be plotted at the coordinates shown in Figure 4.
  • the component a can be set to 0.55 or more by setting ⁇ to a predetermined value or more for each tZD. Therefore, in this embodiment, after approximating the value of ⁇ for which ⁇ becomes 0.55 for each tZD with a function (natural logarithmic function) using tZD as a variable, ⁇ is set to a value equal to or greater than the approximate function.
  • the profile of the roll 10 is set. More specifically, the hole-shaped profile of the rolling roll 10 is set so that the angle j8 satisfies the following expression (1).
  • ⁇ of the pipe P can be set to 0.55 or more as described above, and thus, ⁇ can be generated on the inner surface of the pipe. It is possible to effectively suppress the occurrence or progress of wrinkles.
  • the groove profile PR of each of the rolling rolls 10 according to the present embodiment has a single arc of radius R as described above with reference to FIG. (That is, the end of the hole-shaped profile PR) corresponds to the end of the arc having the radius R.
  • the roll profile of each roll 10 according to the present invention is not limited to this, and rolls having various roll profiles as shown in FIG. 7 can also be employed.
  • FIG. 7 is a view showing a portion corresponding to a region surrounded by a dotted line in FIG. 6 with respect to a groove profile of a grooved rolling roll according to another embodiment of the present invention. As shown in Fig.
  • the present invention described using a three-roll type constant diameter rolling machine as an example is not limited to this.
  • the present invention can be similarly applied to a constant-diameter rolling machine having a rolling roll.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

Un procédé de fabrication de tubes, comprenant une étape consistant à laminer un tube à un diamètre fixe en utilisant un dispositif pour laminage à diamètre fixe, formé d'une pluralité d'emplacements comportant une pluralité de rouleaux de laminage de type à cavités. Le procédé est caractérisé en ce que, lorsque la valeur maximum des angles formés par les tangentes dessinées sur les pièces d'arêtes opposées des rouleaux de laminage de type à cavités adjacents l'un à l'autre dans la totalité des emplacements est β (degrés), le diamètre extérieur du tube sur le côté extérieur du dispositif pour laminage à diamètre fixe est D (mm) et l'épaisseur de la paroi du tube du côté extérieur du dispositif pour laminage à diamètre fixe est t (mm), de telle sorte qu'on peut utiliser un rouleau de laminage de type à cavités, dont l'angle β peut satisfaire l'exigence de l'expression (1) qui suit. β ≥ 1,13 × 10 × Ln (t/D × 100) + 1,37 × 102 ... (1)
PCT/JP2005/005198 2004-03-29 2005-03-23 Procédé de fabrication de tubes et dispositif pour laminage à diamètre fixe WO2005092531A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05721298A EP1731234B1 (fr) 2004-03-29 2005-03-23 Procédé de fabrication de tubes pour laminage à diamètre fixe
JP2006511469A JP4650747B2 (ja) 2004-03-29 2005-03-23 管の製造方法及び定径圧延装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004096821 2004-03-29
JP2004-096821 2004-03-29

Publications (1)

Publication Number Publication Date
WO2005092531A1 true WO2005092531A1 (fr) 2005-10-06

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PCT/JP2005/005198 WO2005092531A1 (fr) 2004-03-29 2005-03-23 Procédé de fabrication de tubes et dispositif pour laminage à diamètre fixe

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Country Link
EP (1) EP1731234B1 (fr)
JP (1) JP4650747B2 (fr)
CN (1) CN100409953C (fr)
WO (1) WO2005092531A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007111258A1 (fr) 2006-03-29 2007-10-04 Sumitomo Metal Industries, Ltd. Tube en acier fini a froid sans jointure pour arbre de transmission et procede pour sa production
WO2008123363A1 (fr) * 2007-03-30 2008-10-16 Sumitomo Metal Industries, Ltd. Tuyau en acier sans soudure, fini à froid, pour un arbre de transmission moulé d'un seul tenant, arbre de transmission utilisant le tuyau et procédé de fabrication du tuyau en acier sans soudure, fini à froid
JP5003833B1 (ja) * 2011-03-31 2012-08-15 住友金属工業株式会社 絞り圧延用ロールの製造方法、及び、絞り圧延用ロール

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101823075B (zh) * 2010-05-25 2013-04-24 攀钢集团有限公司 无缝钢管头尾壁厚削尖轧制方法
KR102476860B1 (ko) * 2019-03-15 2022-12-12 제이에프이 스틸 가부시키가이샤 이음매 없는 각형 강관의 제조 방법

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JPS61216805A (ja) * 1985-03-22 1986-09-26 Nippon Kokan Kk <Nkk> ストレッチ・レデューサーの圧延方法
JPH10156412A (ja) 1996-11-26 1998-06-16 Sumitomo Metal Ind Ltd 管材の圧延ロールおよび圧延方法

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JPS5728604A (en) * 1980-07-25 1982-02-16 Sumitomo Metal Ind Ltd Caliber roll
US5713234A (en) * 1995-01-10 1998-02-03 Sumitomo Metal Industries, Ltd. Piercing-rolling method and piercing-rolling apparatus for seamless tubes
DE19506858C1 (de) * 1995-02-14 1996-01-18 Mannesmann Ag Walzenkalibrierung für ein Rohrreduzierwalzwerk
CN1141191C (zh) * 1995-05-10 2004-03-10 住友金属工业株式会社 用于无缝钢管的穿孔／轧制方法和设备
DE19539408C2 (de) * 1995-10-11 2003-03-20 Sms Demag Ag Kaliberkontur der Walze eines Rohrwalzwerkes
DE10201717C1 (de) * 2002-01-18 2003-04-10 Sms Meer Gmbh Verfahren und Vorrichtung zum Walzen eines Rohres

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JPS61216805A (ja) * 1985-03-22 1986-09-26 Nippon Kokan Kk <Nkk> ストレッチ・レデューサーの圧延方法
JPH10156412A (ja) 1996-11-26 1998-06-16 Sumitomo Metal Ind Ltd 管材の圧延ロールおよび圧延方法

Non-Patent Citations (1)

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Title
See also references of EP1731234A4 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007111258A1 (fr) 2006-03-29 2007-10-04 Sumitomo Metal Industries, Ltd. Tube en acier fini a froid sans jointure pour arbre de transmission et procede pour sa production
JP4853514B2 (ja) * 2006-03-29 2012-01-11 住友金属工業株式会社 ドライブシャフト用冷間仕上継目無鋼管の製造方法
CN101410194B (zh) * 2006-03-29 2012-07-04 住友金属工业株式会社 驱动轴用冷精加工无缝钢管的制造方法
WO2008123363A1 (fr) * 2007-03-30 2008-10-16 Sumitomo Metal Industries, Ltd. Tuyau en acier sans soudure, fini à froid, pour un arbre de transmission moulé d'un seul tenant, arbre de transmission utilisant le tuyau et procédé de fabrication du tuyau en acier sans soudure, fini à froid
JP5273036B2 (ja) * 2007-03-30 2013-08-28 新日鐵住金株式会社 一体成形型ドライブシャフト用冷間仕上継目無鋼管およびそれを用いたドライブシャフト、並びにその冷間仕上継目無鋼管の製造方法
JP5003833B1 (ja) * 2011-03-31 2012-08-15 住友金属工業株式会社 絞り圧延用ロールの製造方法、及び、絞り圧延用ロール
WO2012133484A1 (fr) 2011-03-31 2012-10-04 住友金属工業株式会社 Procédé de fabrication d'un cylindre de réduction et cylindre de réduction

Also Published As

Publication number Publication date
JPWO2005092531A1 (ja) 2008-02-07
EP1731234A4 (fr) 2007-10-24
CN1905958A (zh) 2007-01-31
CN100409953C (zh) 2008-08-13
EP1731234B1 (fr) 2011-08-03
JP4650747B2 (ja) 2011-03-16
EP1731234A1 (fr) 2006-12-13

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