WO2012133484A1 - Procédé de fabrication d'un cylindre de réduction et cylindre de réduction - Google Patents

Procédé de fabrication d'un cylindre de réduction et cylindre de réduction Download PDF

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Publication number
WO2012133484A1
WO2012133484A1 PCT/JP2012/058058 JP2012058058W WO2012133484A1 WO 2012133484 A1 WO2012133484 A1 WO 2012133484A1 JP 2012058058 W JP2012058058 W JP 2012058058W WO 2012133484 A1 WO2012133484 A1 WO 2012133484A1
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WO
WIPO (PCT)
Prior art keywords
roll
ridge
steel pipe
radius
curvature
Prior art date
Application number
PCT/JP2012/058058
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English (en)
Japanese (ja)
Inventor
龍太郎 尾形
Original Assignee
住友金属工業株式会社
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 住友金属工業株式会社 filed Critical 住友金属工業株式会社
Priority to CN201280013630.1A priority Critical patent/CN103459056B/zh
Priority to BR112013023809-7A priority patent/BR112013023809B1/pt
Priority to MX2013011178A priority patent/MX338263B/es
Priority to US14/008,587 priority patent/US20140013815A1/en
Priority to EP12765966.2A priority patent/EP2692453B1/fr
Publication of WO2012133484A1 publication Critical patent/WO2012133484A1/fr

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    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making

Definitions

  • the present invention relates to a method for producing a drawing roll and a drawing roll, and more particularly to a method for producing a drawing roll and a drawing roll used in a three-roll type drawing mill for drawing a steel pipe.
  • a drawing mill typified by a sizer or stretch reducer draws a steel pipe to a predetermined outer diameter.
  • a three-roll type drawing mill is mainly known. Three-roll drawing mills are described in, for example, International Publication No. 2005/070574 and International Publication No. 2005/092531.
  • a drawing mill usually includes a plurality of stands arranged along a pass line.
  • Each stand includes a plurality of drawing rolls having grooves that form a hole mold (caliber).
  • the three rolls of each stand are arranged at equal intervals around the pass line, and are offset by 60 ° around the pass line from the three rolls included in the previous stage stand. .
  • a roll included in each stand of a drawing mill has an elliptical arc-shaped groove in a transverse section (a section in a direction perpendicular to a pass line, that is, a section including a roll axis).
  • a transverse section a section in a direction perpendicular to a pass line, that is, a section including a roll axis.
  • the surface layer portion of the steel pipe being rolled may protrude from the groove of the roll, and so-called biting flaws may occur. Furthermore, if the load acting on the steel pipe portion in contact with the vicinity of the groove edge in the steel pipe to be rolled is increased, edge flaws are likely to occur in the steel pipe portion. Specifically, linear wrinkles are likely to occur in the longitudinal direction of the steel pipe.
  • An object of the present invention is to provide a method for producing a drawing roll that can suppress the occurrence of biting wrinkles and edge wrinkles.
  • a method for producing a drawing roll according to an embodiment of the present invention is used in a three-roll type drawing mill for drawing and rolling a steel pipe, and is adjacent to the caliber part having a bow-shaped groove in a cross section. It is a manufacturing method of the roll for drawing rolling provided with the flange part to perform.
  • the method for producing a drawing roll includes the steps of preparing a drawing roll, rotating the drawing roll around the roll axis, and cutting a ridge formed at an adjacent portion between the caliber portion and the flange portion. And a step of rounding the ridge.
  • the average radius of curvature measured at a pitch of 0.5 mm in the ridge region in the range of 3.0 mm in the roll axis direction around the top of the ridge is 2.5 mm to
  • the difference between the maximum value and the minimum value of the curvature radius is set to 3.0 mm or less.
  • a drawing roll that can suppress the occurrence of biting flaws and edge flaws can be produced.
  • the roll for reduction rolling is used for a three-roll type reduction rolling mill for drawing and rolling a steel pipe.
  • the drawing roll includes a caliber portion having a groove having an arcuate cross section and a flange portion adjacent to the caliber portion.
  • the average curvature radius measured at 0.5 mm pitch is 2.5 mm to 3 mm. 0.0 mm, and the difference between the maximum value and the minimum value of the radius of curvature is 1.0 mm or less.
  • the roll for drawing rolling according to the present embodiment can suppress the occurrence of biting wrinkles and edge wrinkles.
  • FIG. 1 is a side view of a three-roll drawing mill.
  • FIG. 2 is a front view of the stand in FIG.
  • FIG. 3 is a front view of a stand in front of the stand shown in FIG.
  • FIG. 4 is a schematic diagram of steel pipe drawing using the three-roll drawing mill shown in FIG.
  • FIG. 5 is a front view of the drawing roll in FIG.
  • FIG. 6 is an enlarged view of the vicinity of the ridge portion of the drawing roll in FIG.
  • FIG. 7 is a schematic view of a lathe used for manufacturing the drawing roll shown in FIG.
  • FIG. 8 is an enlarged view of the vicinity of a ridge portion of a drawing roll drawn by the lathe shown in FIG. FIG.
  • FIG. 9 is a schematic diagram for explaining a method for measuring the radius of curvature of the ridge shown in FIG.
  • FIG. 10 is a diagram illustrating an example of a method for measuring the curvature radius of the ridge portion illustrated in FIG. 8.
  • FIG. 11 is a cross-sectional view of the room temperature curable resin in FIG.
  • FIG. 12 is a diagram showing measurement results of the shape and curvature radius of the roll used in the example.
  • FIG. 1 is a side view of a drawing mill 1 according to the present embodiment.
  • the drawing mill 1 is a three-roll type.
  • a drawing mill 1 includes a plurality of stands ST1 to STm (m is a natural number) arranged along a pass line RA.
  • the drawing mill 1 is, for example, a stretch reducer, and the number of stands m is about 20-30.
  • FIG. 2 is a front view of the stand STi (i is a natural number of m or less) of the drawing mill 1 shown in FIG. 1, and FIG. 3 is a front view of the stand STi-1.
  • each stand STi includes three drawing rolls (hereinafter simply referred to as rolls) 11.
  • the three rolls 11 are arranged at equal intervals around the pass line RA. Accordingly, the three rolls 11 are arranged around the pass line RA every 120 °.
  • the roll 11 has a groove 20 whose cross section (cross section in the roll axis direction) has an arcuate shape.
  • the grooves 20 of the three rolls 11 form a hole type PA.
  • the three rolls 11 included in the stand STi are arranged so as to be shifted by 60 ° around the pass line RA from the three rolls 11 included in the stand STi-1 in the previous stage.
  • each stand STi The three rolls of each stand STi are connected to each other by a bevel gear (not shown). When one of the three rolls 11 is rotated by a motor (not shown), all the rolls 11 are rotated.
  • the cross-sectional area of the hole-shaped PA formed by the three rolls 11 of each stand STi is smaller as the stand of the latter stage. Therefore, the cross-sectional area of the hole type PA formed by the stand ST1 is the largest, and the cross-sectional area of the hole type PA formed by the last stand STm is the smallest.
  • the steel pipe is drawn and rolled along the pass line RA from the stand ST1 through the stand STm, and becomes a steel pipe having a predetermined outer diameter and thickness.
  • the roll 11 included in the stand STi has a shape shown in FIG. Referring to FIG. 5, the roll 11 includes a caliber portion 50 and a pair of flange portions 51.
  • the caliber portion 50 has a columnar shape, and has a groove 20 having an arcuate shape in cross section on the surface.
  • the flange portion 51 has a disk shape and is arranged coaxially with the caliber portion 50.
  • the flange portion 51 has a truncated cone shape whose width decreases as the distance from the caliber portion 50 increases.
  • the caliber portion 50 and the flange portion 51 are integrally formed.
  • the transverse shape of the groove 20 that is, the shape of the groove 20 in the cross section in the roll axial direction X of the roll 11 is an arcuate shape.
  • the groove 20 is an arc having a radius Ra1.
  • the line segment DB connecting the groove bottom (center of the groove 20 in the roll axis direction) GB and the pass line RA is shorter than the radius Ra1. Therefore, the transverse shape of the groove 20 is an elliptical arc shape with the line segment DB as the short semi-axis. Since the transverse shape of the groove 20 is an elliptical arc, the rolling reduction per stand can be increased to some extent.
  • FIG. 6 is an enlarged view of the vicinity of the ridge 52 shown in FIG. With reference to FIG. 6, the ridge 52 extends in the circumferential direction of the roll 11. The ridge portion 52 is rounded.
  • the above-mentioned drawing mill 1 manufactures a thin steel pipe by drawing rolling.
  • the thickness of the thin steel pipe is, for example, 2.0 to 3.0 mm, and the outer diameter is, for example, 30.0 to 100.0 mm.
  • biting wrinkles and edge wrinkles are likely to occur.
  • the edge wrinkle here means a linear wrinkle formed along the longitudinal direction on the surface of the steel pipe as a result of the surface layer portion of the steel pipe being removed by the ridges of the roll.
  • a thin steel pipe is likely to cause bites and edge wrinkles because the wall thickness is thin, so that the portion of the steel pipe that is rolling is in contact with the portion near the edge of the groove 20 (hereinafter referred to as the metal portion) in the roll axis direction. It is presumed that it is easy to flow into X.
  • the manufacturing method of the roll 11 is explained in full detail.
  • FIG. 7 is a schematic diagram of a lathe machine 60.
  • a lathe machine 60 includes a bed 601, a headstock 602, a carriage 603, a tailstock 604, and a control device 605.
  • the spindle stock 602 and the tailstock 604 include a chuck (not shown).
  • the roll 11 is rotatably attached to the lathe machine 60 by chucks of the headstock 602 and the tailstock 604.
  • the headstock 602 further includes a motor (not shown).
  • the roll 11 is rotated around the roll axis by the motor.
  • the carriage 603 is disposed on the bed 601.
  • the carriage 603 can be moved in the roll axis direction by a motor (not shown).
  • the carriage 603 includes a cutting tool 606.
  • the cutting tool 606 can be moved in a direction perpendicular to the roll axis (the radial direction of the roll 11) by a servo motor (not shown).
  • the control device 605 controls the rotation speed of the roll 11.
  • the control device 605 further controls movement of the carriage 603 in the roll axis direction and movement of the cutting tool 606 in the radial direction of the roll 11.
  • the control device 605 may include a storage device that stores shape data of the grooves 20 and the ridges 52. In this case, the control device 605 controls the movement of the carriage 603 and the cutting tool 606 based on the shape data.
  • the groove 20 is formed by a lathe.
  • the ridge 52 is cut. Specifically, instead of the cutting tool 606, an R cutting tool 607 having a concave cutting edge and a predetermined curvature is attached to the carriage 603. While rotating the roll 11, the R cutting tool 607 is brought into contact with the ridge 52, and the ridge 52 is chamfered. At this time, the ridge 52 is cut so that the radius of curvature of the ridge 52 satisfies the following conditions.
  • FIG. 8 shows an enlarged view of the ridge 52.
  • the ridge 52 has a convex shape in the roll radial direction Y and is rounded.
  • the point having the highest height in the Y direction is defined as the summit T52.
  • an area RA52 in the range of 3.0 mm in the X-axis direction with the top T52 as the center is specified.
  • this region is defined as a ridge region RA52.
  • the ridge region RA52 includes a range of 1.5 mm from the top T52 to the left side (cariba portion 50 side) in the drawing and a range of 1.5 mm from the top T52 to the right side (flange portion 51 side).
  • the radius of curvature is obtained at a pitch of 0.5 mm in the roll axis direction X.
  • points P1 to Pn (n is a natural number) on the surface of the ridge region RA52 are specified at a pitch of 0.5 mm in the roll axis direction X.
  • the radius of curvature Rt at the point Pt (t is a natural number smaller than n) is obtained as follows. Two points (point Pt-1 and point Pt + 1) adjacent to the point Pt are specified. Next, a circle CRt passing through the three specified points (point Pt-1, point Pt, and point Pt + 1) is obtained. The calculated radius of the circle CRt is defined as the curvature radius Rt at the point Pt.
  • the radii of curvature R1 to Rn (mm) at the points P1 to Pn satisfy the following expressions (1) and (2).
  • Rmax is the maximum value of the measured radius of curvature
  • Rmin is the minimum value of the measured radius of curvature.
  • the average radius of curvature measured at 0.5 mm pitch in the roll axis direction X in the ridge region RA52 is 2.5 to 3.0 mm, and the maximum and minimum values of the measured radius of curvature are The difference is 1.0 mm or less.
  • the radius of curvature of each of the above points P1 to Pn is measured as follows. After the ridge 52 is cut by the lathe 60, the room temperature curing resin 70 is brought into contact with an arbitrary portion of the ridge 52 and cured as shown in FIG. Next, the surface shape of the cured room temperature curable resin 70 is measured using a three-dimensional shape measuring machine. Specifically, with reference to FIG. 11, the cross-sectional shape of room-temperature-curing resin 70 is measured when it is cut by a plane including the roll axis and extending in the roll radial direction. In the cross section of FIG. 11, the region RA ⁇ b> 72 where the ridge 52 is molded has the same shape as the ridge 52.
  • the shape of the ridge 52 can be obtained by measuring the shape of the region 72. Based on the obtained shape of the ridge 52, the curvature radius Rn is obtained at a pitch of 0.5 mm in the roll axis direction X as described above.
  • the shape may be measured by a measuring method other than the three-dimensional shape measuring machine.
  • the curvature radius Rn is obtained by the method described above. Then, based on the calculated curvature radius Rn, it is determined whether or not the ridge portion 52 satisfies the expressions (1) and (2). When the formula (1) or the formula (2) is not satisfied, the R cutting tool is adjusted and the ridge portion 52 is cut again.
  • the roll 11 manufactured by the above-described manufacturing method is attached to the drawing mill 1 to perform drawing rolling. In this case, the occurrence of bites and edge wrinkles of the thin steel pipe is particularly suppressed.
  • the roll 11 manufactured by the above method is attached to a stand STi having an outer diameter processing degree of 5.7 to 6.3%.
  • the outer diameter processing degree is defined by Expression (3).
  • Degree of outer diameter processing (%) [ ⁇ (Cross sectional area of hole type of stand STi-1) ⁇ (Cross sectional area of hole type of stand STi-1) ⁇ / (Cross sectional area of hole type of stand STi-1)] ⁇ 100 (3) In this case, the occurrence of biting wrinkles and edge wrinkles is effectively suppressed.
  • the drawing roll 11 according to the present embodiment is particularly suitable for manufacturing a thin steel pipe having an outer diameter of 30.0 to 100.0 mm and a wall thickness of 2.0 to 3.0 mm.
  • the roll 11 can suppress the occurrence of biting flaws and edge wrinkles to some extent even when manufacturing a steel pipe other than the above-described outer diameter and wall thickness.
  • the roll 11 is applied to at least one stand STi among the plurality of stands ST1 to STm, the above effect can be obtained to some extent.
  • the roll 11 exhibits a remarkable effect when applied to the stand STi whose outer diameter processing degree defined by the expression (3) is within the above-described range.
  • the transverse shape of the groove 20 is an arc having a radius Ra1.
  • the shape of the groove 20 is not limited to this.
  • the transverse shape of the groove 20 may be an arc having a radius Ra1 at the groove bottom portion and an arc shape having a radius Ra2 (Ra2> Ra1) at the groove edge portion.
  • the groove edge portion may be linear.
  • the cross shape of the groove 20 may be an arcuate shape.
  • the ridge 52 is cut by the lathe machine 60 and the R cutting tool 607, but the ridge 52 may be cut by another known method.
  • the groove 20 and the ridge 52 may be continuously cut by the control device 605 of the lathe machine 60.
  • the operator may adjust the installation position of the R bit 607 and cut the ridge 52.
  • a plurality of rolls having ridges with different shapes were prepared. Then, the occurrence rate of biting wrinkles and edge wrinkles when drawn and rolled using each roll was investigated.
  • the ridge shape was measured for each set (A set to C set) of rolls. Each set had three rolls 11. In each set, an arbitrary one of the ridges 52 of the roll 11 was molded using a room temperature curable resin (Technobit). The radius of curvature of the ridge region RA52 was obtained at a pitch of 0.5 mm by the above-described method using the room temperature curable resin that was molded.
  • FIG. 12 shows the shape and the radius of curvature of the ridges 52 of each set obtained by the above-mentioned die cutting.
  • the “R shape” column in the table shows the ridge shape of A set to C set in a graph.
  • the vertical axis (Y coordinate) of each graph indicates the distance in the radial direction of the roll.
  • the horizontal axis (X coordinate) of the graph indicates the distance in the roll axis direction X.
  • the dotted line in the figure shows the ridge shape when the radius of curvature is 2.5 mm.
  • the solid line in the figure indicates the actual shape of each set of rolls 11.
  • the radius of curvature obtained at a pitch of 0.5 mm in the roll axis direction X of the ridge shape shown in the “R shape” column is shown in a graph.
  • the vertical axis of each graph represents the radius of curvature (mm).
  • the horizontal axis (X coordinate) indicates the coordinate in the roll axis direction X.
  • “T52” on the horizontal axis indicates the position of the top T52 of the ridge 52.
  • T52-1.5 mm indicates a position moved 1.5 mm from the top T52 to the left side (cariba portion side) in the figure, and “T52 + 1.5 mm” is 1 from the top T52 to the right side (flange portion side) in the figure. Indicates the position moved 5 mm. In short, the range between “T52 ⁇ 1.5 mm” and “T52 + 1.5 mm” indicates the ridge region RA52.
  • the set B satisfied Expression (1) and Expression (2).
  • the F1 value of A set exceeded 3.0 mm
  • the F2 value exceeded 1.0 mm. That is, the A set did not satisfy the expressions (1) and (2).
  • the C set had an F1 value exceeding 3.0 mm and an F2 value exceeding 1.0 mm. Therefore, neither C set nor formula (1) and formula (2) was satisfied.
  • the hot steel pipe from the No. 3 stand was visually observed to determine whether or not the steel pipe had bite or edge flaws. Then, the soot generation rate (%) was obtained based on the equation (5).
  • Table 1 shows the survey results.
  • F1 value of the roll of B set satisfy
  • F2 value satisfy
  • the roll of C set did not satisfy the expressions (1) and (2). Therefore, the soot generation rate was high and was 30.0%. Moreover, the roll of A set did not satisfy

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

La présente invention se rapporte à un procédé de fabrication d'un cylindre de réduction, l'apparition de défauts d'ailette et de défauts de bord pouvant être supprimée. On prépare un cylindre de réduction utilisé dans un laminoir de réduction à trois cylindres. Ensuite, pendant le cylindre de réduction est mis à tourner autour d'un axe de roulis, une partie arête (52) formée dans une section adjacente entre une partie calibre et une partie bride est coupée pour arrondir la partie arête (52). Au cours de l'étape consistant à arrondir la partie arête (52), dans une région de partie arête (RA52) se situant dans une plage de 3,0 mm dans une direction d'axe de roulis, la partie supérieure de la partie arête (52) étant le centre, la moyenne des rayons de courbure mesurée selon un pas de 0,5 mm est établie à une valeur comprise entre 2,5 et 3,0 mm et la différence entre la valeur maximale et la valeur minimale des rayons de courbure est établie à une valeur égale ou inférieure à 1,0 mm.
PCT/JP2012/058058 2011-03-31 2012-03-28 Procédé de fabrication d'un cylindre de réduction et cylindre de réduction WO2012133484A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201280013630.1A CN103459056B (zh) 2011-03-31 2012-03-28 减径轧制用辊的制造方法及减径轧制用辊
BR112013023809-7A BR112013023809B1 (pt) 2011-03-31 2012-03-28 Método para a fabricação de cilindro para laminação redutora e cilindro para laminação redutora
MX2013011178A MX338263B (es) 2011-03-31 2012-03-28 Metodo para fabricar rodillo para reduccion, y rodillo para reduccion.
US14/008,587 US20140013815A1 (en) 2011-03-31 2012-03-28 Method for manufacturing roll for reducing rolling, and roll for reducing rolling
EP12765966.2A EP2692453B1 (fr) 2011-03-31 2012-03-28 Procédé de fabrication d'un cylindre de réduction et cylindre de réduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-079759 2011-03-31
JP2011079759A JP5003833B1 (ja) 2011-03-31 2011-03-31 絞り圧延用ロールの製造方法、及び、絞り圧延用ロール

Publications (1)

Publication Number Publication Date
WO2012133484A1 true WO2012133484A1 (fr) 2012-10-04

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PCT/JP2012/058058 WO2012133484A1 (fr) 2011-03-31 2012-03-28 Procédé de fabrication d'un cylindre de réduction et cylindre de réduction

Country Status (7)

Country Link
US (1) US20140013815A1 (fr)
EP (1) EP2692453B1 (fr)
JP (1) JP5003833B1 (fr)
CN (1) CN103459056B (fr)
BR (1) BR112013023809B1 (fr)
MX (1) MX338263B (fr)
WO (1) WO2012133484A1 (fr)

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CN103341514A (zh) * 2013-07-05 2013-10-09 中北大学 一种曲线回转外形筒体零件的辊挤去飞边成型装置

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CN114273571B (zh) * 2021-12-01 2024-03-22 中北大学 一种带内网格筋筒形件辊挤成形模具
CN116078810B (zh) * 2023-02-17 2023-11-07 科城精铜(广州)有限公司 一种提高铜杆抗拉强度的轧制装置及方法

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Publication number Publication date
CN103459056B (zh) 2015-03-04
CN103459056A (zh) 2013-12-18
EP2692453A4 (fr) 2014-11-19
JP5003833B1 (ja) 2012-08-15
BR112013023809B1 (pt) 2019-04-02
EP2692453A1 (fr) 2014-02-05
MX338263B (es) 2016-04-11
JP2012213786A (ja) 2012-11-08
MX2013011178A (es) 2013-12-06
EP2692453B1 (fr) 2015-12-30
US20140013815A1 (en) 2014-01-16
BR112013023809A2 (pt) 2016-12-13

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