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WO2013031803A1 - Procédé de fabrication et équipement de fabrication d'un tube métallique de petit diamètre - Google Patents

Procédé de fabrication et équipement de fabrication d'un tube métallique de petit diamètre Download PDF

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Publication number
WO2013031803A1
WO2013031803A1 PCT/JP2012/071784 JP2012071784W WO2013031803A1 WO 2013031803 A1 WO2013031803 A1 WO 2013031803A1 JP 2012071784 W JP2012071784 W JP 2012071784W WO 2013031803 A1 WO2013031803 A1 WO 2013031803A1
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WO
WIPO (PCT)
Prior art keywords
roll
metal
diameter side
diameter
manufacturing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/071784
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English (en)
Japanese (ja)
Inventor
中村　大輔
仲子　武文
朝田　博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel Co 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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to SG11201400254WA priority Critical patent/SG11201400254WA/en
Priority to CN201280042663.9A priority patent/CN103764308B/zh
Priority to IN414MUN2014 priority patent/IN2014MN00414A/en
Priority to KR1020147006473A priority patent/KR101526342B1/ko
Publication of WO2013031803A1 publication Critical patent/WO2013031803A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0822—Guiding or aligning the edges of the bent sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/26—Seam welding of rectilinear seams
    • B23K26/262—Seam welding of rectilinear seams of longitudinal seams of tubes

Definitions

  • the present invention relates to a method for manufacturing a metal pipe, particularly a weld pipe having a small diameter such that the outer diameter is less than 20 mm, and an apparatus therefor.
  • the roll forming method is a method in which a metal strip is supplied to a plurality of roll forming stands, for example, which are arranged in tandem and have 10 or more stages, and the metal strip is continuously formed into a cylindrical shape (for example, Patent Document 1). See). Thereafter, both side edges (that is, edge parts) of the metal strip formed into a cylindrical shape are brought into contact with each other and welded to produce a metal tube.
  • the production line is composed of a plurality of roll forming stands, that is, multi-stage stands as described above.
  • the load increases.
  • the downtime of a production line becomes long with a roll exchange operation
  • work there also exists a problem that the production efficiency of a weld metal pipe will fall.
  • the above-described roll forming method may cause meandering, twisting, or other forming defects in the metal band unless strict adjustment is performed on each stand. There is a problem that the production efficiency of the metal pipe is significantly reduced.
  • the die draw forming method is a manufacturing method in which a metal band is continuously formed into a cylindrical shape by supplying the metal band to a forming die and then pulling it out from the forming die (see, for example, Patent Document 2).
  • the forming die used for forming the metal strip into a cylindrical shape may be one stage. That is, only one molding stand is required.
  • a laser welding method is adopted as a method of abutting and welding the edge portions of a metal strip formed into a cylindrical shape.
  • the laser welding method is suitable from the viewpoint of the productivity and workability of the weld metal pipe.
  • the roll forming method is not only a problem that the work load associated with roll replacement work and dimension adjustment increases, but also when manufacturing small diameter metal tubes, meandering due to slight adjustment mistakes in the roll forming stand. There is a problem that defects are likely to occur when the edges of the metal band are abutted against each other, such as twisting and twisting.
  • the present invention has been proposed to solve such problems. That is, only a single roll having a diameter that is clearly larger than the outer diameter of the metal pipe to be manufactured, that is, a single-stand large-diameter roll is used. And, to provide a method and apparatus for manufacturing a small-diameter metal pipe which is formed into a cylindrical shape with high accuracy without using lubricating oil, and then welds and joins the edges of the metal band. Objective.
  • the small diameter metal tube manufacturing method of the present invention has an outer diameter ratio ⁇ 2 / ⁇ 1 of the outer diameter ⁇ 1 of the metal tube to be manufactured and the outer diameter ⁇ 2 of the roll of at least 10 or more.
  • a large-diameter side roll is used, the large-diameter side roll is composed of at least a first large-diameter side roll and a second large-diameter side roll, and a metal strip is supplied to the large-diameter side roll, and the metal strip is cylindrical After being formed, the edge portion of the metal strip is welded.
  • the outer diameter ratio ⁇ 2 / ⁇ 1 is preferably 25 or more. Furthermore, as will be described later, in order to improve the butt shape at the time of welding, the metal band is supplied to the edge bend roll before the metal band is supplied to the large-diameter side roll, and the edge of the metal band in advance It is preferable to bend the part.
  • the large-diameter roll stand used by the execution of the present invention is preferably arranged in a three-way roll system composed of two large-diameter side rolls and one bottom roll (FIG. 8 (A )).
  • FIG. 8A is a cross-sectional view showing the structure of a three-way roll type large-diameter side roll in which a bottom roll is arranged, as will be described later. Specifically, for the arrangement of the rolls, a pair of large-diameter side rolls are installed side by side so that their rotational axes are parallel and their outer peripheral surfaces face each other.
  • the bottom roll is disposed so that the outer peripheral surface of the bottom roll is positioned in the vicinity of the facing portion where the outer peripheral surfaces of the two large-diameter side rolls face each other. In the facing portion, the edge portions are brought into contact with each other when the metal tube is formed.
  • the rotation axis of the bottom roll is substantially orthogonal to the rotation axes of the two large-diameter side rolls.
  • the bottom roll is offset from the upstream side in the traveling direction of the metal strip (that is, the entry side of the production line) with reference to the line connecting the rotation axes of the pair of large-diameter side rolls. Preferably (see FIG. 10).
  • FIG. 10 is a top view showing a more preferable installation position of the bottom roll used in the three-way roll type large-diameter side roll of the present invention, as will be described later.
  • the bottom roll offset on the upstream side in the traveling direction of the metal strip, it is possible to further reduce the strain generated when the metal tube is formed.
  • a four-way roll method in which fin rolls are further arranged may be adopted (see FIG. 11).
  • the fin roll is disposed at the facing portion so that the outer circumferential surface faces the outer circumferential surface of the bottom roll and the rotation axis is parallel to the rotation axis of the bottom roll.
  • a fin roll may be arranged on the upper part of the squeeze roll immediately before the edge of the metal strip is welded and joined at the position of the squeeze roll.
  • the fin roll used at this time is preferably provided with a fin and a concave surface having a radius of curvature larger than the radius of the metal tube to be manufactured. Because, by using the above-described fin roll, the fin accurately positions the butt portion at a preferred position for the next welding, and presses the edge portion of the metal strip by the concave surface to butt the edge portion. This is because the shape when hitting can be corrected. Thereby, a small-diameter metal tube with excellent forming accuracy can be obtained.
  • the metal strip can be formed into a cylindrical shape with a single stand, but has a small diameter with excellent surface properties. It is possible to manufacture a metal tube with high efficiency.
  • the total number of stands required for manufacturing the metal tube can be greatly reduced, and the work of roll replacement and dimension adjustment by the operator can be reduced. It is. Furthermore, it is possible to stably manufacture a small-diameter metal tube by appropriately using a fin roll.
  • (A) is a perspective view showing a positional relationship between a schematic structure of a large-diameter side roll used in the present invention and a welding machine that welds and joins a butt portion of an edge.
  • (B) is an enlarged view which shows the groove part of a large diameter side roll. It is a figure which shows the relationship between outer diameter ratio (phi) 2 / (phi) 1, and the equivalent plastic strain which arises in the edge part of a metal strip.
  • It is the schematic of the manufacturing line used for manufacture of the small diameter metal pipe of this invention.
  • It is sectional drawing which shows schematic structure of an edge bend roll.
  • FIG. 1 It is a figure which shows curving the edge part of a metal strip using two large diameter side rolls. It is a figure which shows the condition where a part of metal belt under deformation has produced a problem between two large-diameter side rolls.
  • (A) is sectional drawing which shows the structure of the three-way roll system large diameter side roll which has arrange
  • (B) is an enlarged view which shows the positional relationship of two large diameter side rolls and a bottom roll. It is a top view which shows the installation position of the bottom roll used for the three-way roll system large diameter side roll of this invention. It is a top view which shows the more preferable installation position of the bottom roll used with the three-way roll system large diameter side roll of this invention.
  • ⁇ Metal tube forming using the roll forming method is generally gently formed by multi-stage forming using ten or more roll forming stands arranged in tandem. For this reason, when changing the diameter of the metal tube to be manufactured, it is necessary to replace all the rolls arranged on the forming stand with ones corresponding to the outer diameter of the metal tube to be manufactured. Moreover, since much labor and time are required for the roll exchange, the productivity is reduced.
  • the present invention has found a means for gently forming a metal strip into a cylindrical shape with a single stand and reducing the strain of the metal strip generated during roll forming. The details will be described below.
  • the large-diameter side roll used in the present invention will be described with reference to FIG.
  • the large-diameter side rolls 42 and 44 (see FIG. 1A) according to the present invention have a considerably large ratio ⁇ 2 / ⁇ 1 of the outer diameter ⁇ 2 of the forming roll to the outer diameter ⁇ 1 of the metal tube to be manufactured.
  • the outer diameter ratio ⁇ 2 / ⁇ 1 is 10 or more, preferably 25 or more.
  • the large-diameter side rolls 42 and 44 designed so that the outer diameter ratio ⁇ 2 / ⁇ 1 is increased in this way can be regarded as a forming die used in the die draw forming method. That is, according to the present invention, when the metal strip 100 is formed into a cylindrical shape, it can be formed with a single stand instead of a multi-stage stand. However, the present invention does not require the lubricating oil used in the die draw forming process.
  • the manufacturing method of the metal tube by this invention is suitable for manufacturing the small diameter metal tube in which an outer diameter is less than 20 mm.
  • the metal tube manufacturing method according to the present invention requires a large-diameter side roll having a considerably large outer diameter ratio according to the outer diameter of the metal tube to be manufactured. That is, when manufacturing a small-diameter metal tube having an outer diameter of less than 20 mm, it is possible to use a large-diameter side roll having an actual diameter, but when manufacturing a metal tube having an outer diameter of more than 20 mm. This is not practical because it is necessary to prepare a large-diameter side roll having a considerably large diameter, and is disadvantageous in that the cost increases.
  • the metal band can be gently roll-formed. . That is, it can shape
  • FIG. 2 shows the relationship between the outer diameter ratio ⁇ 2 / ⁇ 1 and the equivalent plastic strain generated at the edge of the metal strip (see FIG. 2A).
  • the metal band can be formed into a cylindrical shape in a state in which the strain generated particularly 0.25 mm inside from the edge portion of the metal band is even smaller (FIG. 2). (See (B)).
  • the outer diameter ratio ⁇ 2 / ⁇ 1 to 10 or more it is possible to form the metal strip with good cross-sectional shape when the edge portion is curved and without warping.
  • On the side surface of the metal strip see FIG. 2B), when the outer diameter ratio ⁇ 2 / ⁇ 1 is about 25, it becomes constant at a low level.
  • the outer diameter ratio ⁇ 2 / ⁇ 1 is more preferably 25 or more.
  • the upper limit of the outer diameter ratio need not be specified, but it is practical to set it to about 80. This is an upper limit that can be considered by the fact that the effect of reducing the strain generated at the edge of the metal strip is saturated at an outer diameter ratio ⁇ 2 / ⁇ 1 of about 80, and considering the roll cost.
  • the metal strip 100 Prior to forming the metal strip 100 into a cylindrical shape using the single-sided large-diameter side rolls 42 and 44, the metal strip 100 is preferably supplied to the edge bend roll. Thereby, it becomes possible to bend the edge part of the metal strip 100 in advance, and to smoothly curve the edge part in the large-diameter roll.
  • FIG. 3 shows an outline of a practical production line used for producing the small-diameter metal tube of the present invention.
  • the metal strip 100 is supplied to the edge bend roll stand 30 with both edges of the metal strip 100 being aligned by the guide 20 while being pressed by the plate presser 10.
  • the metal strip 100 is curved at both edges by the edge bend rolls 34 and 32 according to the side end R of the edge bend roll, and then formed into a cylindrical shape at the large diameter side rolls 42 and 44 of the large diameter roll stand 40.
  • the position accuracy of the butting position of the edge portion of the metal strip 100 is increased by the fin roll 80, and the metal strip 100 is supplied to the squeeze roll stand 50, and the butted portion is welded and joined by the welding machine 120.
  • the metal pipe 70 is manufactured from the metal strip 100.
  • Reference numeral 60 denotes a drawing device.
  • the edge bend roll stand 30 includes a pair of upper and lower rolls, that is, a first edge bend roll 32 having a concave groove with a side end R attached to one edge bend roll, and the other edge. It is comprised from the 2nd edge bend roll 34 which has a protruding item
  • both edge portions of the metal strip 100 are curved according to the side end R of the edge bend roll. Further, the metal strip 100 is supplied to the large-diameter side roll stand 40 (see FIGS. 1 and 5) and formed into a cylindrical shape.
  • the metal strip 100 is formed into a cylindrical shape in the large-diameter side rolls 42 and 44 in such a manner that the metal strip 100 after being supplied to the edge bend roll is pressed by the pair of large-diameter side rolls 42 and 44 from the left and right. (See FIG. 6).
  • a gap is formed between one large-diameter side roll (first large-diameter side roll 42) and the other large-diameter side roll (second large-diameter side roll 44) (see P in FIG. 7). Is formed.
  • the metal strip 100 receives pressure from these large-diameter side rolls 42 and 44, a part of the metal strip 100 escapes into the gap P, and a defect may occur in the formed cylindrical shape (see FIG. 7).
  • a so-called “receiving portion” is provided at the position of the gap P formed between the first large-diameter side roll 42 and the second large-diameter side roll 44. "Is preferably arranged.
  • the “receiving part” will be described with reference to FIG.
  • the first large-diameter side roll 42 and the second large-diameter side roll 44 have an inclination of about 30 degrees from the outermost side to the inner side in the radial direction at one of the axial ends. It has been cut so that. More specifically, as shown in FIG. 8, the metal band back surface side of the first large-diameter side roll 42 (that is, in FIG. 8) so that an inclination of about 30 degrees is formed from the radially outermost side to the inner side.
  • the lower side of the paper surface is cut, and the back side of the metal band of the second large-diameter side roll 44 (that is, the paper surface of FIG.
  • a bottom roll 90 is disposed between the two large-diameter side rolls 42 and 44 that are inclined in this way (see FIG. 8A).
  • the bottom roll 90 becomes a “receiving portion”.
  • the center line O ′ of the bottom roll 90 is arranged so as to coincide with a line O (hereinafter referred to as “orthogonal line O”) that is substantially orthogonal to the respective rotation axes of the first and second large-diameter side rolls 42 and 44.
  • orthogonal line O a line that is substantially orthogonal to the respective rotation axes of the first and second large-diameter side rolls 42 and 44.
  • problems may occur when the metal strip 100 is formed into a cylindrical shape. This is presumably because if the orthogonal line O and the center line O ′ of the bottom roll 90 coincide with each other, the metal strip 100 is constrained in the circumferential direction, resulting in excessive distortion.
  • the metal strip 100 is supplied to the two large-diameter side rolls 42 and 44 as described above. Before being supported by the bottom roll 90, the bottom of the metal strip 100 may slide downward and bend. The bottom of the bent metal strip 100 is then supported by the bottom roll 90 and lifted to be bent or bent back again. Thereby, it is estimated that the metal strip 100 is excessively strained to cause a defect.
  • the bottom roll is on the opposite side of the traveling direction of the metal strip 100 (the traveling direction X of the production line) with respect to the orthogonal line O of the large-diameter side rolls 42 and 44 (that is, the upstream side of the production line).
  • An offset is arranged (see Q in FIG. 10).
  • a metal tube is manufactured by abutting and welding the edge portions of the metal strip 100 formed into a cylindrical shape. As shown in FIG. 3, in a state where the metal strip 100 formed into a cylindrical shape is held by the squeeze roll stand 50, the edge portions are abutted and welded together by the welding machine 120.
  • the welding method is preferably a laser welding method from the viewpoint of productivity and workability of the manufactured welded metal pipe.
  • the welding method is not limited to the laser welding method, and arc welding methods such as TIG welding and plasma welding may be used, and other high-frequency welding methods may be used.
  • a first fin roll 80 is added to the butting portion side and roll forming is performed by a four-way roll method. It is preferable to do so (see FIG. 11).
  • the metal tube is roll-formed by providing the fin roll 80 on the metal band surface side of the large-diameter side rolls 42 and 44 (that is, directly above the large-diameter side roll in the paper surface of FIG. 11) (see FIG. 11).
  • the metal strip 100 is twisted in the circumferential direction until it is conveyed to the squeeze roll stand 50, which may cause problems in welding (for example, see FIG. 12). ).
  • This is considered to be due to the deviation of the centering position of the steel strip when feeding the metal strip 100 as the raw material into the production line and the deviation of the roll center such as a large-diameter side roll or squeeze roll.
  • it is difficult to adjust such a shift manually which leads to an increase in cost and is not realistic.
  • the first fin roll 80 is provided on the metal band surface side of the large-diameter side rolls 42, 44, but also the metal band 100 is formed as shown in FIG.
  • a second fin roll 82 was provided on the side opposite to the metal band side with respect to the squeeze roll (that is, the upper side of the squeeze roll).
  • the butt position of the edge portion can be determined with high accuracy at two locations along the traveling direction X of the production line, so that the butt portion extends in a straight line. Is ensured. Thereby, more stable continuous welding is possible.
  • the strain applied to each part of the steel strip is not uniform and is biased by various factors. Therefore, the shape of the edge portion of the metal strip 100 becomes unstable, and a difference in the edge position is likely to occur. Even when the step does not occur, for example, as shown in FIG. 15, the edge portion is likely to be poorly matched, and welding may be difficult.
  • This phenomenon becomes more prominent as the diameter of the metal tube to be manufactured becomes smaller. That is, as shown in FIG. 14, when the diameter of the metal tube to be manufactured is relatively large (see FIG. 14A), the shape of the butt between the edge portion 110a and the edge portion 110b is I-type. (See FIG. 14B), it is possible to butt and weld without problems. However, when the diameter of the metal pipe to be manufactured is reduced (see FIG. 15A), the shape of the abutting position between the edge portion 110c and the edge portion 110d is V-shaped as seen in FIG. 15B. And cause poor welding.
  • the second side is opposite to the side of the metal strip 100 based on the squeeze roll (that is, the upper side of the squeeze roll).
  • a fin roll 82 was placed (see FIG. 16).
  • the second fin roll 82 includes fins 82a and a pressing surface 88 having a radius of curvature larger than the radius of the metal tube to be manufactured.
  • Example 1 An example of manufacturing a metal tube with an outer diameter of ⁇ 6.5 mm ( ⁇ 1 ) using a ferritic stainless steel strip with a thickness of 0.5 mm having a composition of 18Cr-1Mo—Ti—low carbon and low nitrogen will be introduced.
  • the production line shown in FIG. 3 was used.
  • As the edge bend roll a roll having a shape shown in FIG. 4 was used.
  • the bottom roll has an outer diameter of 62 mm, and the offset Q of the large-diameter side roll is 0 mm in the upstream direction of the production line with respect to the center line, and 12 mm, 14 mm, 15 mm, 16 mm, 18 mm and 20 mm.
  • the first fin roll 80 is disposed on the metal band surface side of the large-diameter side rolls 42 and 44 (that is, the upper side of the large-diameter side rolls 42 and 44).
  • the squeeze roll stand 50 was not placed at the position immediately before.
  • the above material was passed through under the condition that the line speed was 4 m / min, and a metal tube was manufactured by fiber laser welding on a squeeze roll under conditions of an output of about 900 W and a beam diameter of 0.6 mm. No lubricant was used.
  • the offset Q was 0 mm, wrinkles were observed on the outer surface of the obtained metal tube, and the roundness was poor.
  • the offset was set, there was no wrinkle on the outer surface at any offset amount, and a metal tube with good roundness could be manufactured.
  • Example 2 Next, a case where a metal tube having an outer diameter of ⁇ 3.7 mm ( ⁇ 1 ) is manufactured from a ferritic stainless steel strip having a thickness of 0.3 mm having a composition of 16.5Cr—Ti—low carbon and low nitrogen will be introduced.
  • the production line shown in FIG. 3 was used.
  • An edge bend roll having a diameter of 100 mm was used.
  • the outer diameter ratio ⁇ 2 / ⁇ 1 is 27 and 81, respectively.
  • the offset Q is 0 mm, 10 mm, 12 mm, 14 mm, 15 mm, and 16 mm on the upstream side in the traveling direction of the metal strip 100. , 18 mm and 20 mm.
  • a metal tube was manufactured under the conditions of a line speed of 4 m / min, a fiber laser output of about 500 W, and a beam diameter of 0.6 mm. No lubricant was used.
  • the first fin roll 80 is disposed above the large-diameter side rolls 42 and 44, and the second fin roll 82 is not disposed immediately before the squeeze roll stand 50.
  • the outer diameter ratio ⁇ 2 / ⁇ 1 was 27 or 81
  • the offset Q was 0 mm
  • wrinkles were observed on the outer surface of the obtained metal tube, and the roundness was poor. It was.
  • the offset Q was set, there was no wrinkle on the outer surface at any offset amount, and a metal tube with good roundness could be manufactured.
  • Example 3 Also introduced is a case where a metal tube with an outer diameter of ⁇ 6.5 mm ( ⁇ 1 ) was manufactured using a ferritic stainless steel strip with a thickness of 0.3 mm, which also has a composition of 16.5Cr—Ti—low carbon and low nitrogen. To do.
  • the offset Q of the bottom roll is set to 0 mm, 5 mm, 7 mm, 10 mm, 12 mm on the upstream side in the traveling direction of the metal strip 100 with reference to the orthogonal line O of the large-diameter side rolls 42, 44.
  • the fin roll 80 is disposed on the upper side of the large-diameter side rolls 42 and 44, and in this third embodiment, immediately before the squeeze roll stand 50, The fin roll 82 was installed on the opposite side (that is, the upper side of the squeeze roll).
  • Two types of fin rolls 82 immediately above the squeeze roll stand 50 have a pressing surface with a radius of curvature of 5 mm and 10 mm. As a result, a total of 16 types of metal tubes were manufactured. No lubricant was used.
  • the material steel strip was passed through under the condition that the line speed was 10 m / min, and fiber laser welding was performed on the squeeze roll under conditions of an output of about 1500 W and a beam diameter of 0.6 mm.
  • Example 4 In addition, an outer diameter ⁇ 6.5 mm ( ⁇ 1 ) using a material obtained by applying aluminum plating on both sides of a 0.5 mm thick ferritic stainless steel strip having a composition of 16.5Cr—Ti—low carbon and low nitrogen. The metal tube was manufactured.
  • the offset Q of the bottom roll is 3 mm, 5 mm, 7 mm, 10 mm, 15 mm on the upstream side in the traveling direction of the metal strip 100 with reference to the orthogonal line O of the large-diameter side rolls 42, 44. It was.
  • the fin roll was installed only on the upper side of the large-diameter side rolls 42 and 44, and was not installed on the upper side immediately before the squeeze roll stand 50.
  • fiber laser welding was performed under the conditions of a line speed of 2 m / min, an output of about 580 W on a squeeze roll, and a beam diameter of 0.6 mm.
  • the above-mentioned aluminum-plated stainless steel strip can be used as a raw steel strip, and in each of the above manufacturing conditions, there can be no flaws on the outer surface at any offset amount, and a metal tube with good roundness can be manufactured. It was.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

Des tubes métalliques de petit diamètre sont fabriqués avec une haute précision et une efficacité de production élevée grâce à l'utilisation d'un rouleau de grand diamètre dans lequel sont disposés des rouleaux dotés de diamètres qui sont clairement supérieurs au diamètre extérieur du tube métallique qui est fabriqué. Une paire de rouleaux latéraux de grand diamètre est utilisée, les rouleaux étant conçus de sorte que le rapport de diamètre extérieur φ2/φ1 du diamètre extérieur φ2 du rouleau de formation sur le diamètre extérieur φ1 du tube métallique qui est fabriqué est supérieur ou égal à 10, de préférence supérieur ou égal à 25. Après la formation d'une bande métallique de manière à obtenir une forme cylindrique dans un support unique, les bords de la bande métallique sont joints et soudés. Le rouleau latéral de grand diamètre qui est utilisé peut être un rouleau de type à trois rouleaux ou à quatre rouleaux.
PCT/JP2012/071784 2011-08-31 2012-08-29 Procédé de fabrication et équipement de fabrication d'un tube métallique de petit diamètre Ceased WO2013031803A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SG11201400254WA SG11201400254WA (en) 2011-08-31 2012-08-29 Method and device for manufacturing small-diameter metal tubes
CN201280042663.9A CN103764308B (zh) 2011-08-31 2012-08-29 小径金属管的制造方法以及制造装置
IN414MUN2014 IN2014MN00414A (fr) 2011-08-31 2012-08-29
KR1020147006473A KR101526342B1 (ko) 2011-08-31 2012-08-29 소경 금속관의 제조 방법 및 제조 장치

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CN111408633A (zh) * 2020-03-31 2020-07-14 吴丽萍 一种超薄金属板焊接工艺、复合水管及其生产设备
KR102738749B1 (ko) * 2024-05-10 2024-12-05 주식회사 풍산테크 금속관 제조장치 및 제조방법

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JP2005199293A (ja) * 2004-01-14 2005-07-28 Nisshin Steel Co Ltd 高加工性溶接管の製造方法
WO2007069425A1 (fr) * 2005-12-16 2007-06-21 Jfe Steel Corporation Procede de fabrication de tube soude a resistance electrique avec d'excellentes caracteristiques de soudage
JP2011050986A (ja) * 2009-09-01 2011-03-17 Nakata Mfg Co Ltd 成形装置と成形方法

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JP5273885B2 (ja) 2013-08-28
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