CN102245320A - Process for production of seamless metal pipe by cold rolling - Google Patents
Process for production of seamless metal pipe by cold rolling Download PDFInfo
- Publication number
- CN102245320A CN102245320A CN2009801495507A CN200980149550A CN102245320A CN 102245320 A CN102245320 A CN 102245320A CN 2009801495507 A CN2009801495507 A CN 2009801495507A CN 200980149550 A CN200980149550 A CN 200980149550A CN 102245320 A CN102245320 A CN 102245320A
- Authority
- CN
- China
- Prior art keywords
- rolling
- pipe
- cold
- wall thickness
- external diameter
- 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.)
- Granted
Links
- 238000005097 cold rolling Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 238000004513 sizing Methods 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims description 49
- 238000003801 milling Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 15
- 230000003467 diminishing effect Effects 0.000 claims description 8
- 230000037303 wrinkles Effects 0.000 abstract description 24
- 238000001125 extrusion Methods 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 29
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 8
- 238000001192 hot extrusion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000005482 strain hardening Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
-
- 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
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/10—Finishing, e.g. smoothing, sizing, reeling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
- B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
- B21B21/02—Rollers therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/08—Diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/14—Reduction rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
Abstract
In cold-rolling a seamless metal pipe by means of a cold pilger mill, too great an outer-diameter reduction as compared with wall thickness reduction creates too great a circumferential strain on the flange sides to result in too great a circumferential compressive stress, whereby wrinkles occur on the inner surface of the pipe. Further, the wrinkles are folded on the groove bottom sides to create cold shut folds. Repetition of these phenomena causes flaws on the inner surface. Unlike a tube stock produced by an extrusion process, a tube stock produced by a Mannesmann-mandrel process has, on the inner surface, wrinkles which have occurred during the sizing (using a stretch reducer or a sizer), and the wrinkles are further encouraged by cold-rolling. Therefore, attention must be paid to this problem. In view of these facts, the ratio of outer-diameter reduction to wall thickness reduction in cold-rolling using a cold pilger mill is adjusted to 1/2 or below, whereby the occurrence of flaws on the inner surface is prevented in the cold rolling, and a high-quality seamless metal pipe having few flaws on the inner surface can be obtained.
Description
Technical field
The present invention relates to a kind of cold rolling process of seamless metal pipe, particularly relate to a kind of aspect and consider that desire guarantees the method inner surface quality, that utilize the high-quality seamless metal pipe of cold rolling manufacturing of senior particular tube from killer tube inner surface wrinkle defect.
Background technology
Seamless metal pipe can't satisfy on the quality, will be sent to the cold working operation on the intensity or under the situation of the requirement on the dimensional accuracy under the hot worked state.As the cold working operation, normally adopt the cold-rolling practice of the cold-drawing process and the employing Pierre form cold-rolling mill of drawing-die and top or drawing-die and plug.
In utilizing Pierre's form cold-rolling mill cold rolling, the degree of finish of tubing is high, by rolling processing even can stretch about 10 times, the rectification effect of the wall unevenness of pipe is also bigger, and, do not need the reducing and rolling operation, have and can not produce the such advantage of yield rate loss.
On the contrary, in utilizing Pierre's form cold-rolling mill cold rolling, compare with cold-drawing process, also there is the extremely low such shortcoming of production efficiency, therefore, the cold rolling higher and intermediate treatment of raw material cost that mainly is applicable to of utilizing Pierre's form cold-rolling mill needs the cold working of the senior particular tube of stainless steel tube, high alloy steel pipe of cost etc.
Fig. 1 is the figure that explanation utilizes the cold rolling mechanism of Pierre's form cold-rolling mill.In the cold-rolling practice of utilizing Pierre's form cold-rolling mill, in pair of rolls 2 and similarly between the diminishing along its length taper plug 4 of diameter pipe 1 to be carried out undergauge rolling and obtain rolled pipe 5 with the along the circumferential direction diminishing taper pass 3 of diameter.
That is, cut pass 3 on the circumference of the pair of rolls 2 of Pierre's form cold-rolling mill, it is shaped as the pass constriction along with roller 2 rotations.Roller 2 advances repeatedly and retreats along the conical surface of plug in the driving rotation that utilizes roll shaft 2s, between roller 2 and plug 4 pipe 1 is carried out undergauge rolling (non-patent literature 1 etc.).
Fig. 2 is the key diagram that expression utilizes the cold rolling process principle of Pierre's form cold-rolling mill, and (a) expression of Fig. 2 is toward the machining status of stroke starting point, and the machining status of stroke starting point is returned in (b) expression of Fig. 2.As shown in Figure 2, in Pierre's form cold-rolling mill, with the external diameter of external diameter, wall thickness dimension (do among the figure, to) and the goods of pipe 1, wall thickness dimension (d among the figure, t) correspondingly, employing have diameter from the engaging-in entrance side of pair of rolls towards the roller 2 that processes the diminishing taper pass 3 of oral-lateral and similarly diameter from engaging-in entrance side towards processing the diminishing taper plug 4 of oral-lateral, on one side pipe 1 is carried out the round rolling stroke that undergauge reduces wall thickness on one side repeatedly.
In the starting point of the past stroke of Pierre's form cold-rolling mill back and forth movement, pipe 1 is paid about 60 ° anglec of rotation and the feeding of about 5～15mm, the new portion of repeat-rolling pipe discontinuously.
Pierre's form cold-rolling mill has and is all reducing milling train wall thickness, " MANNESMANN-DEMAG company " exploitation toward stroke and returning in these two strokes of stroke and only reducing this dual mode of milling train wall thickness, that " BLAWKNOX company " develops in stroke.Usually, when rolling stainless steel tube, high alloy steel pipe or zirconium pipe etc., adopt the milling train of the former mode, when aluminum and compo pipe and copper and compo pipe thereof, adopt the milling train of latter's mode.
1183～1189 pages of the common equipment of 1: the 3 editions iron steel of non-patent literature brief guide the 3rd volume (2) bar steel steel pipe rolling
In the cold rolling senior particular tube of applications exploiting Pierre form cold-rolling mill, the characteristic that strong request is high-quality must be suppressed at and produce the defect in inner surface that is caused by the inner surface wrinkle defect in the goods pipe after cold rolling.But, do not propose by utilizing the cold rolling method that can not produce the high-quality seamless steel pipe of defect in inner surface of making of Pierre's form cold-rolling mill in the past.
Summary of the invention
The present invention promptly makes in view of the above problems, and its problem is to propose a kind of method of the high-quality seamless steel pipe of cold rolling manufacturing of the Pierre's of utilization form cold-rolling mill.
In addition, in the present invention the Pierre's form cold-rolling mill (MANNESMANN-DEMAG company) that is rolled in coming and going two strokes is described, but object is not limited thereto, and the present invention also can be applied to only reducing Pierre's form cold-rolling mill (BLAWKNOX company) of wall thickness in stroke.
The inventor has been based upon the result who solves above-mentioned problem and carry out various researchs, draw such opinion: in the seamless metal pipe that utilizes Pierre's form cold-rolling mill cold rolling, when the external diameter slip is compared with the wall thickness slip when excessive, excessive to the circumferencial direction compression stress that pipe applies, be easy to produce wrinkle defect at pipe internal surface.
And, make the situation of pipe except utilizing glass lubricant high speed extrusion process, utilizing Mannesmann's mandrel roll process to make under the situation of pipe, might be because fixed diameter rolling (utilizing stretching undergauge milling train or sizing mill to carry out) produces the inner surface wrinkle defect in the stage of pipe.The inner surface wrinkle defect that produces in stage of pipe can produce very big influence to the quality of the cold rolling senior particular tube of using Pilger formula cold-rolling mill.
The present invention promptly is based on above-mentioned opinion and finishes, and its purport is the method for utilizing cold rolling manufacturing seamless metal pipe of following (1) and (2).
(1) a kind of method of utilizing cold rolling manufacturing seamless metal pipe, this method is to utilize Pierre's form cold-rolling mill to make the method for seamless metal pipe, it is characterized in that, with the external diameter of the external diameter of pipe and wall thickness dimension and goods rolled pipe and wall thickness dimension correspondingly, use have diameter from the engaging-in entrance side of pair of rolls towards the roller that processes the diminishing taper pass of oral-lateral and similarly diameter from engaging-in entrance side towards processing the diminishing taper plug of oral-lateral, when on one side undergauge reduced wall thickness ground on one side and carries out drawing/rolling, making external diameter slip Rd was below 1/2 of wall thickness slip Rt.
Wherein, be made as do: pipe external diameter, d: processing external diameter, to: pipe wall thickness and t: under the situation of processing wall thickness, external diameter slip Rd and wall thickness slip Rt utilize following (a) and (b) formula to calculate.
Rd＝{1-(d/do)}×100(％)…(a)
Rt＝{1-(t/to)}×100(％)…(b)
(2) in the method for the cold rolling manufacturing seamless metal pipe of utilizing of above-mentioned (1), expectation is used and to be utilized stretching undergauge milling train is the pipe that hot reducing and rolling is processed under the condition below 77% at the external diameter slip.Also to use and to utilize sizing mill be the pipe that hot reducing and rolling is processed under the condition below 33% at the external diameter slip in expectation.
Adopt the method for utilizing cold rolling manufacturing seamless metal pipe of the present invention, when one side undergauge reduces wall thickness ground on one side and carries out drawing/rolling, by seeking the processing balance of external diameter slip Rd and wall thickness slip Rt, can suppress to produce the defect in inner surface that is caused by the inner surface wrinkle defect, it is high-quality can making the goods pipe after cold rolling.
And,,, can further improve the product property after cold rolling by the external diameter slip of restriction fixed diameter rolling (utilizing stretching undergauge milling train or sizing mill to carry out) utilizing Mannesmann mandrel roll process to make under the situation of pipe.
Description of drawings
Fig. 1 is the figure that explanation utilizes the cold rolling mechanism of Pierre's form cold-rolling mill.
Fig. 2 is the key diagram that expression utilizes the cold rolling process principle of Pierre's form cold-rolling mill, and (a) expression of this Fig. 2 is toward the machining status of stroke starting point, and the machining status of stroke starting point is returned in (b) expression of Fig. 2.
Fig. 3 is the figure that expression utilizes the parted pattern of the rolling tube section of Pierre's form cold-rolling mill.
Fig. 4 is the figure that expression utilizes the deformational behavior of the rolling tube section of Pierre's form cold-rolling mill.
Fig. 5 is that explanation is used for the figure of an example of manufacturing process that heat is made Mannesmann's mandrel roll process of seamless steel pipe.
The specific embodiment
Fig. 3 is the figure that expression utilizes the parted pattern of the rolling tube section of Pierre's form cold-rolling mill.Whether the inner surface according to pipe 1 contacts with plug 4, tube section can be divided into the zone of bottom land side 11,14 and flange side 12,13.Utilize 4 pairs of bottom land sides of roller and plug 11,14 to carry out wall thickness processing and that bottom land side 11,14 is stretched is rolling, flange side 12,13 is pulled distortion in the stretching of bottom land side.That is, the material of bottom land side 11,14 is out of shape under external pressure, interior pressure and axis direction compression stress, and the material of flange side 12,13 is out of shape under external pressure and axis direction tension force.
Fig. 4 is the figure that expression utilizes the deformational behavior of the rolling tube section of Pierre's form cold-rolling mill, and (a) expression of Fig. 4 is toward the deformational behavior of rolling (toward rolling) of stroke, and the deformational behavior of rolling (the returning rolling) of stroke is returned in (b) expression of Fig. 4.Deformational behavior shown in Figure 4 only is based on to be paid revolution and is returning and do not paying rotating cooked mode in rolling managing 1 in rolling, and from tubing, roller is configured to only relatively rotating with tubing toward stroke in, does not relatively rotate in returning stroke.
Shown in the (a) and (b) of Fig. 4, in Pierre's form cold-rolling mill (MANNESMANN-DEMAG company) of the type that round two strokes all are rolled, 60 ° of revolutions are basic, therefore, the distortion of tube section is an asymmetrical deformation with respect to horizontal axis, the vertical axis and asymmetric of pass.In deformational behavior shown in Figure 4, represent the bottom land sides at i number toward rolling midship section 11 and 14, section 12 and 13 expression flange sides.
In deformational behavior shown in Figure 4, when external diameter slip Rd is excessive with respect to wall thickness slip Rt, the compression strain of the circumferencial direction of flange side
Become big, the result, the stress in compression sigma θ of circumferencial direction (not shown) is excessive, produces the inner surface wrinkle defect, takes place foldingly in the bottom land side, repeats this situation and develops into defect in inner surface, makes the inner surface quality badness.
When manufacturing required the particular tube of high-quality characteristic, external diameter slip Rd was with respect to the quality of the ratio decision goods of wall thickness slip Rt.And, except the situation of the pipe that utilizes the manufacturing of hot extrusion (glass lubricant pushes at a high speed) technology to use for Pierre's form cold-rolling mill, exist in the inner surface wrinkle defect that hot reducing and rolling operation produces on the pipe that utilizes Mannesmann's mandrel roll process manufacturing, this defective further develops in cold rolling process and displays.
Fig. 5 is that explanation is used for the figure of an example of manufacturing process that heat is made Mannesmann's mandrel roll process of seamless steel pipe.This technology will be heated to the solid round steel billet 21 of set point of temperature as rolled material, and this round steel billet 21 is fed to perforation milling train 23, its axle center part be bored a hole make hollow parts (perhaps hollow pipe) 22.Then, the drawing/rolling device that the hollow parts of making 22 is fed to with keeping intact follow-up mandrel mill 24 carries out drawing/rolling, makes hollow blank pipe (perhaps pipe) 22.
When carrying out drawing/rolling with mandrel mill 24, when hollow blank pipe 22 stretched at the roll 24r that is limited the hollow blank tube outer surface by plug 24b and being used to, its material temperature can reduce, and wherein, plug 24b is inserted into the inner surface of hollow blank pipe 22.Therefore, then to be loaded in the reheating furnace 25 with the mandrel mill 24 rolling hollow blank pipes 22 that form and heat again.Afterwards, the fixed diameter rolling of stretched undergauge milling train 26 or sizing mill (not shown) and become the seamless steel pipe of hot rolling.If it is less that the temperature in mandrel mill reduces, then do not need reheating furnace.
But, in above-mentioned Mannesmann mandrel roll process, in carrying out the stretching undergauge milling train of fixed diameter rolling, sizing mill, make hollow blank pipe 22 by roll 26r, do not use inner surface restriction instruments such as plug, utilize the external diameter reducing and rolling that hollow tube base 22 is processed, therefore, the inner surface of the steel pipe after hot-working is easy to produce wrinkle defect.
At this, the inventor also will utilize pipe that stretching undergauge milling train and sizing mill reducing and rolling form as test material except the hot extrusion pipe, the external diameter slip of change reducing and rolling, cold rolling external diameter slip and wall thickness slip are rolled experiment, observe little tissue repeatedly, the condition that suppresses wrinkle defect is studied.
As mentioned above, in the seamless metal pipe that utilizes Pierre's form cold-rolling mill cold rolling, the external diameter slip is compared with the wall thickness slip when excessive, the circumferencial direction strain of flange side is excessive, as a result, the circumferencial direction compression stress is excessive, produces wrinkle defect at pipe internal surface, folding and become the invagination defective in the bottom land side, repeat this situation and develop into defect in inner surface.
Result based on above-mentioned research, make the situation of pipe except utilizing hot extrusion technique, under the situation of utilizing Mannesmann's mandrel process manufacturing pipe, sometimes because fixed diameter rolling (utilizing stretching undergauge milling train or sizing mill to carry out) produces the inner surface wrinkle defect in the stage of pipe, under the situation that has the inner surface wrinkle defect, can further develop via cold rolling this defective, therefore should be noted that.
In the method for utilizing cold rolling manufacturing seamless metal pipe of the present invention, if except the hot extrusion pipe that adopts, also consider with hot size pipe after rolling as object, then the external diameter slip of Pierre's form cold-rolling mill need be below 1/2 of wall thickness slip.
In the method for utilizing cold rolling manufacturing seamless metal pipe of the present invention, utilizing stretching undergauge milling train to carry out under the situation of fixed diameter rolling, it is the pipe that hot reducing and rolling is processed under the condition below 77% that expectation is used at the external diameter slip, and, utilizing sizing mill to carry out under the situation of fixed diameter rolling, it is the pipe that hot reducing and rolling is processed under the condition below 33% that expectation is used at the external diameter slip.
Embodiment
To utilize pipe that hot extrusion (glass lubricant pushes at a high speed) technology and Mannesmann's mandrel roll process (stretching undergauge milling train and sizing mill processing) make as test material, to utilize Pilger formula cold-rolling mill to carry out the rolling situation of undergauge by cold working is example, has estimated the inner surface quality of goods.
With the external diameter that utilizes hot extrusion technique to make for 50.8mm, wall thickness for the 25Cr-30Ni-3Mo high alloy steel pipe of 5.5mm as the test pipe, utilize Pierre's form cold-rolling mill will test the pipe undergauge and be rolled into external diameter and be 2.4mm for 38.1mm, wall thickness.Send to and the angle of revolution paying the zero hour toward stroke.Experiment condition is summarized as follows.
The diameter of conic mandrel bar: dm=39.6～33.1mm (conical surface is arranged)
Feeding (sending to) toward stroke: f=8.0mm
Toward the angle of revolution (anglec of rotation) of stroke: θ=60 °
Tube blank size: do * to=50.8mm * 5.5mm
Processing dimension: d * t=38.1mm * 2.4mm
Undergauge ratio: d/do=0.75
Draw ratio: to (do-to)/t (d-t)=2.91
Wall thickness/external diameter ratio: t/d=0.063
External diameter slip/wall thickness slip ratio: Rd/Rt=0.46＜1/2
Wherein, external diameter slip: Rd={1-(do/d) } * 100 (%)
Wall thickness slip: Rt={1-(to/t) } * 100 (%)
Sometimes also can not produce wrinkle defect on the pipe that is crushed to, the utmost point produces the defect in inner surface that is caused by wrinkle defect slightly on the goods after cold rolling, has obtained the inner surface quality that should satisfy.
With utilize Mannesmann's mandrel roll process by intersect external diameter that punch, mandrel mill and stretching undergauge milling train make be 48.6mm, wall thickness be the high alloy steel pipe of 25Cr-30Ni-3Mo of 6.0mm as the test pipe, utilize Pierre's form cold-rolling mill will test the pipe undergauge and be rolled into external diameter and be 2.2mm for 41.0mm, wall thickness.The external diameter slip of stretching undergauge milling train is below 77%.Experiment condition is summarized as follows.
The diameter of conic mandrel bar: dm=36.4mm (the no conical surface)
Feeding toward stroke: f=8.0mm
Toward the angle of revolution of stroke: θ=60 °
Tube blank size: do * to=48.6mm * 6.0mm
Processing dimension: d * t=41.0mm * 2.2mm
Undergauge ratio: d/do=0.84
Draw ratio: to (do-to)/t (d-t)=3.0
Wall thickness/external diameter ratio: t/d=0.054
External diameter slip/wall thickness slip ratio: Rd/Rt=0.25＜1/2
Wherein, external diameter slip: Rd={1-(do/d) } * 100 (%)
Wall thickness slip: Rt={1-(to/t) } * 100 (%)
The external diameter slip of stretching undergauge milling train is below 77%, to carry out undergauge rolling but because while utilizing full stretch mode to pay between support tension force to greatest extent, therefore, do one's utmost to have suppressed generation inner surface wrinkle defect, produce the defect in inner surface that causes by wrinkle defect slightly on the goods after cold rolling, obtained the inner surface quality that should satisfy.
With utilize Mannesmann's mandrel roll process by intersect external diameter that punch, mandrel mill and sizing mill make be 101.6mm, wall thickness be the high alloy steel pipe of 25Cr-30Ni-3Mo of 7.0mm as the test pipe, utilize Pierre's form cold-rolling mill will test the pipe undergauge and be rolled into external diameter and be 2.8mm for 88.9mm, wall thickness.The external diameter slip of sizing mill is below 33%.Experiment condition is summarized as follows.
The diameter of conic mandrel bar: dm=83.8mm (the no conical surface)
Feeding toward stroke: f=10.0mm
Toward the angle of revolution of stroke: θ=60 °
Tube blank size: do * to=101.6mm * 7.0mm
Processing dimension: d * t=88.9mm * 2.8mm
Undergauge ratio: d/do=0.88
Draw ratio: to (do-to)/t (d-t)=2.8
Wall thickness/external diameter ratio: t/d=0.032
External diameter slip/wall thickness slip ratio: Rd/Rt=0.21＜1/2
Wherein, external diameter slip: Rd={1-(do/d) } * 100 (%)
Wall thickness slip: Rt={1-(to/t) } * 100 (%)
The external diameter slip of sizing mill is below 33%, compare quite little with the external diameter slip under the situation of stretching undergauge milling train, therefore, do one's utmost to have suppressed generation inner surface wrinkle defect, produce the defect in inner surface that causes by wrinkle defect slightly on the goods after cold rolling, obtained the inner surface quality that should satisfy.
Industrial applicibility
Adopt the method for utilizing cold rolling manufacturing seamless metal pipe of the present invention, when on one side undergauge reduces wall thickness ground on one side and carries out drawing/rolling, by seeking the processing balance of external diameter slip Rd and wall thickness slip Rt, can suppress to produce the defect in inner surface that is caused by the inner surface wrinkle defect, it is high-quality can making the goods pipe after cold rolling.
And,,, can further improve the product property after cold rolling by the external diameter slip of restriction fixed diameter rolling (utilizing stretching undergauge milling train or sizing mill to carry out) utilizing Mannesmann mandrel roll process to make under the situation of pipe.Thus, can be widely used as the method for utilizing the high-quality seamless metal pipe of cold rolling manufacturing.
Description of reference numerals
1: pipe; 2, hole type roll; 3, taper pass; 4, taper plug; 5, rolled pipe; 11,14, bottom land side section; 12,13, flange side section; 21, round steel billet; 22, hollow parts, hollow blank pipe; 24, mandrel mill; 25, reheating furnace; 26, precision mill, stretching undergauge milling train.
Claims (3)
1. method of utilizing cold rolling manufacturing seamless metal pipe, this method are to utilize Pierre's form cold-rolling mill to make the method for seamless metal pipe, it is characterized in that,
With the external diameter of the external diameter of pipe and wall thickness dimension and goods rolled pipe and wall thickness dimension correspondingly, use have diameter from the engaging-in entrance side of pair of rolls towards the roller that processes the diminishing taper pass of oral-lateral and similarly diameter from engaging-in entrance side towards processing the diminishing taper plug of oral-lateral
When on one side undergauge reduced wall thickness ground on one side and carries out drawing/rolling, making external diameter slip Rd was below 1/2 of wall thickness slip Rt,
Wherein, Rd={1-(d/do) } * 100 (%)
Rt＝{1-(t/to)}×100(％)
Do: pipe external diameter, d: processing external diameter, to: pipe wall thickness, t: processing wall thickness.
2. the method for utilizing cold rolling manufacturing seamless metal pipe according to claim 1 is characterized in that,
It is the pipe that hot reducing and rolling is processed under the condition below 77% at the external diameter slip that use utilizes stretching undergauge milling train.
3. the method for utilizing cold rolling manufacturing seamless metal pipe according to claim 1 is characterized in that,
It is the pipe that hot reducing and rolling is processed under the condition below 33% at the external diameter slip that use utilizes sizing mill.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008327763 | 2008-12-24 | ||
| JP2008-327763 | 2008-12-24 | ||
| PCT/JP2009/069823 WO2010073863A1 (en) | 2008-12-24 | 2009-11-25 | Process for production of seamless metal pipe by cold rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102245320A true CN102245320A (en) | 2011-11-16 |
| CN102245320B CN102245320B (en) | 2015-09-02 |
Family
ID=42287483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980149550.7A Expired - Fee Related CN102245320B (en) | 2008-12-24 | 2009-11-25 | Utilize the method for cold rolling manufacture seamless metal pipe |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20110271731A1 (en) |
| EP (1) | EP2390016B1 (en) |
| JP (1) | JP4893858B2 (en) |
| KR (1) | KR101311598B1 (en) |
| CN (1) | CN102245320B (en) |
| CA (1) | CA2743165C (en) |
| ES (1) | ES2533620T3 (en) |
| WO (1) | WO2010073863A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521521A (en) * | 2013-10-17 | 2014-01-22 | 太原科技大学 | Concave roller type pipe skew rolling tension tube reducing technological method |
| CN106862273A (en) * | 2017-04-10 | 2017-06-20 | 广东科莱博科技有限公司 | A kind of milling method of cold rolled tube |
| CN113543901A (en) * | 2019-03-15 | 2021-10-22 | 杰富意钢铁株式会社 | Method for manufacturing seamless square steel pipe |
| CN115011914A (en) * | 2022-08-08 | 2022-09-06 | 西北工业大学 | Preparation method of medical cobalt-based alloy seamless pipe |
| CN115318828A (en) * | 2022-09-02 | 2022-11-11 | 张家港华裕有色金属材料有限公司 | Rolling method for cold-rolled metal pipe |
| CN115338266A (en) * | 2022-09-02 | 2022-11-15 | 张家港华裕有色金属材料有限公司 | Cold rolling method for metal pipe |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294378A (en) * | 2011-06-21 | 2011-12-28 | 吉欣（英德）热轧不锈复合钢有限公司 | Manufacturing method of inner composite stainless steel pipe with medium or small diameter |
| CN104353673A (en) * | 2014-11-04 | 2015-02-18 | 辽宁天丰特殊工具制造有限公司 | Fixed diameter reducing machine for eliminating inner squares of steel pipe |
| KR101584300B1 (en) | 2015-06-11 | 2016-01-11 | 최광준 | Pilger mill capable of supplying lubricant for mandrel |
| CN109940059B (en) * | 2017-12-21 | 2021-04-02 | 有研工程技术研究院有限公司 | Preparation method of precise thin-wall large-diameter aluminum alloy pipe |
| JP7288255B2 (en) * | 2018-09-19 | 2023-06-07 | 長野鍛工株式会社 | How to introduce equivalent strain |
| CN114160605A (en) * | 2021-10-28 | 2022-03-11 | 首都航天机械有限公司 | Forming device and method suitable for variable-section pipe |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725209A (en) * | 1980-07-18 | 1982-02-10 | Sumitomo Metal Ind Ltd | Production of seamless metallic pipe |
| JPH04127902A (en) * | 1990-09-18 | 1992-04-28 | Sumitomo Metal Ind Ltd | Manufacture of thin-wall small diameter tube of silver alloy |
| JP2924523B2 (en) * | 1992-12-11 | 1999-07-26 | 住友金属工業株式会社 | Elongation rolling method of metal tube by mandrel mill |
| DE4335063C1 (en) * | 1993-10-11 | 1995-05-04 | Mannesmann Ag | Cold pilger rolling mill for the cold-rolling of tubes (pipes) |
| CN2182005Y (en) * | 1994-05-19 | 1994-11-09 | 北京科技大学 | Extender |
| US5699690A (en) * | 1995-06-19 | 1997-12-23 | Sumitomo Metal Industries, Ltd. | Method and apparatus for manufacturing hollow steel bars |
| JP3853428B2 (en) * | 1995-08-25 | 2006-12-06 | Ｊｆｅスチール株式会社 | Method and equipment for drawing and rolling steel pipes |
| JPH1080715A (en) * | 1996-09-05 | 1998-03-31 | Sumitomo Metal Ind Ltd | Production of steel tube used as it is cold rolled |
| CN1224471C (en) * | 2000-09-19 | 2005-10-26 | 鞍山钢铁集团公司 | Section-variable tube of single rotator and its manufacture method and equipment |
| JP2003062604A (en) * | 2001-08-28 | 2003-03-05 | Sanyo Special Steel Co Ltd | Manufacturing method for pipe with superior punchability |
| EP2045026B1 (en) * | 2004-03-30 | 2012-07-04 | Sumitomo Metal Industries, Ltd. | Method and device for controlling sizing mill of pipe or tube |
| JP4192970B2 (en) * | 2005-06-28 | 2008-12-10 | 住友金属工業株式会社 | Cold rolling method for metal tubes |
-
2009
- 2009-11-25 WO PCT/JP2009/069823 patent/WO2010073863A1/en active Application Filing
- 2009-11-25 JP JP2010543983A patent/JP4893858B2/en active Active
- 2009-11-25 EP EP09834667.9A patent/EP2390016B1/en not_active Not-in-force
- 2009-11-25 CN CN200980149550.7A patent/CN102245320B/en not_active Expired - Fee Related
- 2009-11-25 CA CA2743165A patent/CA2743165C/en not_active Expired - Fee Related
- 2009-11-25 KR KR1020117012333A patent/KR101311598B1/en active IP Right Grant
- 2009-11-25 ES ES09834667.9T patent/ES2533620T3/en active Active
-
2011
- 2011-06-17 US US13/162,840 patent/US20110271731A1/en not_active Abandoned
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521521A (en) * | 2013-10-17 | 2014-01-22 | 太原科技大学 | Concave roller type pipe skew rolling tension tube reducing technological method |
| CN103521521B (en) * | 2013-10-17 | 2015-11-18 | 太原科技大学 | A kind of recessed roll-type tubing oblique milling stretch reducing process |
| CN106862273A (en) * | 2017-04-10 | 2017-06-20 | 广东科莱博科技有限公司 | A kind of milling method of cold rolled tube |
| CN113543901A (en) * | 2019-03-15 | 2021-10-22 | 杰富意钢铁株式会社 | Method for manufacturing seamless square steel pipe |
| CN113543901B (en) * | 2019-03-15 | 2023-08-04 | 杰富意钢铁株式会社 | Method for manufacturing seamless square steel tube |
| CN115011914A (en) * | 2022-08-08 | 2022-09-06 | 西北工业大学 | Preparation method of medical cobalt-based alloy seamless pipe |
| CN115318828A (en) * | 2022-09-02 | 2022-11-11 | 张家港华裕有色金属材料有限公司 | Rolling method for cold-rolled metal pipe |
| CN115338266A (en) * | 2022-09-02 | 2022-11-15 | 张家港华裕有色金属材料有限公司 | Cold rolling method for metal pipe |
| CN115338266B (en) * | 2022-09-02 | 2023-10-27 | 张家港华裕有色金属材料有限公司 | Cold rolling method for metal tube |
| CN115318828B (en) * | 2022-09-02 | 2023-10-27 | 张家港华裕有色金属材料有限公司 | Rolling method for cold-rolled metal pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4893858B2 (en) | 2012-03-07 |
| ES2533620T3 (en) | 2015-04-13 |
| CN102245320B (en) | 2015-09-02 |
| CA2743165A1 (en) | 2010-07-01 |
| JPWO2010073863A1 (en) | 2012-06-14 |
| EP2390016A1 (en) | 2011-11-30 |
| KR20110071026A (en) | 2011-06-27 |
| EP2390016B1 (en) | 2015-01-07 |
| WO2010073863A1 (en) | 2010-07-01 |
| CA2743165C (en) | 2013-07-16 |
| KR101311598B1 (en) | 2013-09-26 |
| EP2390016A4 (en) | 2013-10-16 |
| US20110271731A1 (en) | 2011-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102245320B (en) | Utilize the method for cold rolling manufacture seamless metal pipe | |
| WO2005068098A9 (en) | Method for producing seamless pipe | |
| CA2646020C (en) | Method for producing ultra thin wall metallic tube by cold rolling method | |
| CN101600520A (en) | Method with process for manufacturing ultrathin wall metallic pipe by cold drawing | |
| CN101534969A (en) | Mandrel mill, its operating method, and seamless pipe manufacturing method | |
| CN105234179A (en) | Technique for sizing thick-walled seamless steel tubes through two-roller skew rolling mill and technique for rolling thick-walled seamless steel tubes through two-roller skew rolling mill | |
| CN102365136A (en) | Method of manufacturing ultra-thin-walled seamless metal tube by cold rolling method | |
| CN103706736B (en) | The roll forming of aluminium alloy straight-flanked ring base is the method for special-shaped thin wall ring | |
| EP2484457A1 (en) | Multi-roll mandrel mill and method for manufacturing seamless pipe | |
| CN101249508A (en) | Method for producing seamless steel pipe with reversible reciprocating periodic time hot rolling technique | |
| JP2006315056A (en) | Method for manufacturing ultrathin long metallic can | |
| RU2332271C1 (en) | Method of manufacturing solid-drawn hot-rolled pipes | |
| CN103249503B (en) | Method for manufacturing seamless pipe | |
| JP4888252B2 (en) | Seamless pipe cold rolling method | |
| CN203750990U (en) | Rolling roller of three-roller punching machine | |
| RU2419497C1 (en) | Method of shell rolling at disk mill | |
| CN103917307A (en) | Seamless-metal-pipe manufacturing method | |
| RU2243837C1 (en) | Method for making hot-deformed seamless large-diameter tubes | |
| Kawai et al. | Rotary straightening of curved shape near both ends of seamless pipe | |
| JP4375180B2 (en) | Method for constant diameter rolling of pipes | |
| JP2006315054A (en) | Method for hot-manufacturing seamless metallic tube by elongation rolling | |
| JPH11104711A (en) | Production method for seamless square shaped steel pipe | |
| JP5765190B2 (en) | Diameter reduction method for seamless steel pipes | |
| JPH06190408A (en) | Device for manufacturing seamless steel tube and its manufacture | |
| JP2019005788A (en) | Rolling method of seamless steel pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NIPPON STEEL + SUMITOMO METAL CORPORATION Free format text: FORMER OWNER: CHUGAI SEIYAKU KABUSHIKI KAISHA Effective date: 20130426 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130426 Address after: Tokyo, Japan, Japan Applicant after: Nippon Steel Corporation Address before: Osaka Japan Applicant before: Sumitomo Metal Industries Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tokyo, Japan, Japan Patentee after: Nippon Iron & Steel Corporation Address before: Tokyo, Japan, Japan Patentee before: Nippon Steel Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20201125 |