CN107138532A - A kind of drilling/rolling method and special equipment for producing thin-wall seamless steel pipe - Google Patents
A kind of drilling/rolling method and special equipment for producing thin-wall seamless steel pipe Download PDFInfo
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- CN107138532A CN107138532A CN201710480752.6A CN201710480752A CN107138532A CN 107138532 A CN107138532 A CN 107138532A CN 201710480752 A CN201710480752 A CN 201710480752A CN 107138532 A CN107138532 A CN 107138532A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000005553 drilling Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 11
- 210000005069 ears Anatomy 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009785 tube rolling Methods 0.000 description 1
Classifications
-
- 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
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- 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
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
- B21B2027/022—Rolls having tapered ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a kind of drilling/rolling method and special equipment for producing thin-wall seamless steel pipe, belong to steel rolling process technical field；It is characterized in, ＜ δ≤45% of enlarging rate 30% of perforating, the specific process parameter design of correspondence perforation deformation, 2=6 ° of cone-shaped roll Toe angle λ；Top face angle γ 3 in the range of once perforated area L21 is worth the top face angle γ 1,3=γ of γ 1 being less than in the range of the L23 of Jun Bi rolling zones（2‑2.5°）；When producing identical seamless steel pipe trimmed size, less pipe diameter is can select, the heat time is reduced, the production efficiency of seamless steel pipe is improved；Punch lengthening coefficient can be reduced simultaneously, improve the Quality of Tail of steel pipe.
Description
Technical field：
The present invention relates to steel rolling process technical field, specifically a kind of drilling/rolling method for producing thin-wall seamless steel pipe and
Special equipment, is mainly used in seamless steel pipe manufacture.
Background technology：
The production task of seamless steel pipe is the nothing that solid pipe is fabricated into required various external diameters and wall thickness specifications
Stitch steel pipe.By taking the mandrel mill-rolled steel pipe mode of production as an example, its hot-rolled production process process is generally：
Step 1：By solid heating of pipe blank to the temperature for being adapted to deformation；
Step 2：It is that the solid pipe that will be heated becomes hollow hollow billet by punch；
Step 3：Hollow billet is carried out by extension rolling by tandem rolling tube machine, its wall thickness is thinned；
Step 4：The steel pipe of external diameter specification required for being obtained finally by sizing mill or stretch-reducing mill.
In step 2 above, it is one the solid pipe heated to be become into hollow hollow billet using cone type piercer
Plant important method.The warp tool of conic perforator is by the cone-shaped roll 2 of a pair of active rotations, a top 3 and leads for a pair
Plate 5 is constituted.Cone-shaped roll 2 is general to be arranged up and down, and guide plate 5 or so is arranged, by this method for arranging, cone-shaped roll axis and rolling
Center line has an angle, referred to as roll off angle α in perpendicular；Cone-shaped roll axis is with rolling centerline in horizontal plane
Inside there are an angle, referred to as nip angle β.Cone-shaped roll 2 is as outer warp tool, and it is to rely on frictional force by pipe 1 that it, which is acted on,
Pass is drawn into, drives pipe 1 to advance in rotation；Top 3 undertakes perforation and the inwall of hollow billet 4 of pipe 1 as interior warp tool
Roll off；The effect of guide plate 5 is the transversely deforming for limiting hollow billet 4.The deformation principle of cone type piercer is that the contact taper of pipe 1 is rolled
Enter perforation area in preparation L1 after roller 2, pipe 1 continues to be rotationally advancing, and into punch block L2, expanding rolling zone L3, pipe is in L2 areas
Completed with L3 areas after perforation, the process of expanding, equal wall roll off, enter professional etiquette circle into hollow billet circle gauging zone L4, become qualified hair
Pipe 4.
By above-mentioned piercing process process, cone type piercer is completed wears into diameter by a diameter of Dp solid pipe
It is hollow hollow billet for Dm, wall thickness Sm.There are several important parameters in the deformation parameter of cone type piercer（Cone-shaped roll 2
General to arrange up and down, guide plate 5 or so is arranged）：
Roll off angle α, refers to cone-shaped roll axis and angle of the rolling centerline in perpendicular；
Nip angle β, refers to cone-shaped roll axis with rolling centerline in horizontal plane within angle；
Hollow billet enlarging rate δ, δ=（Dm-Dp）/Dp×100%；
Perforation lengthening coefficient,。
Japan Patent CN88101659A disclosed patent in 1988《The perforation of seamless steel pipe and manufacture method》, closer to
Introduce to one step the technical essential of cone type piercer.Its technology contents is as follows：80≤β≤200；50≤α≤350；150≤β+α
≤500；The diameter Dp of pipe, the diameter Dm of hollow billet and hollow billet wall thickness Sm are determined by following relationship simultaneously：1.5≤-ψr/ψθ
≤4.5.Wherein Ψr=, ψθ=.The punch can realize perforation lengthening coefficientMore than 4.0 or
Perforate enlarging rate δ more than 15% or hollow billet wall thickness Sm and hollow billet diameter Dm ratio below 6.5%.Invent the mesh of the technology
Be increase punch deformability, shorten seamless steel tube production technological process.
《Steel pipe》5th phase steel pipe historical narrative is also described to the developing history of cone type piercer within 1999, stiefel
File an application on the patent of cone type piercer to be 1897 for the first time, later cone type piercer just makes no public appearances.Directly
It is mounted with that a cone type piercer instead of before original automatic tube rolling mills of Φ 340 to Mannesmann Steel Pipe Ltd in 1981
Two stiefel punches（Barrel roll punch with resting guide）；Nineteen eighty-two SUMITOMO CHEMICAL Hainan steel tube factory connects in Φ 114
Cone type piercer before pipe mill is gone into operation, and indicates that cone type piercer obtains " regenerating ".Cone type piercer adds change
Shape ability, increases the external diameter of punch hollow billet and the ratio of wall thickness, the wall thickness specifications of punch is more nearly finished product requirement, wear
The perforation enlarging rate δ of hole machine can reach 40%, lengthening coefficient of perforating6 are can reach, but document does not disclose the detailed matter of its product
Amount situation and concrete technology design method（See《The development of piercing process and appearing again for cone mannesmann piercer》, gold as Song write, deliver
In《Steel pipe》Phase April the 2nd in 2003）.
Find out from above-mentioned prior art, cone type piercer deformability is larger, while being adapted to the perforation of high alloy pipe
The advantages of production, but not comprehensive disclosure roll off angle α and hollow billet enlarging rate δ and perforation lengthening coefficientSpecific matching relationship,
More without specifically specific design method.Swift and violent hair has been obtained from eighties of last century the eighties beginning cone type piercer
Exhibition, its device parameter also solidifies substantially, roll off angle α=15 of cone-shaped roll0, the nip angle 9 of cone-shaped roll0≤β≤120Model
Enclose interior adjustable.Found in practice, the excessive perforation enlarging rate δ of punch can reduce the wall thickness essence of hollow billet under this device parameter
Also have described below in degree and inside and outside surface quality, relevant speciality books：" dual roll type tapered roller Mannesmann piercing mill it is maximum expanding
Rate can reach 40% or so.But excessive enlarging rate can not only bring difficulty to pass adjustment, can also reduce the wall thickness of hollow billet
Precision and show quality, therefore, to obtain the measured hollow billet of matter, from enlarging rate 10% -15% or so preferably ".From domestic several families
The cone type piercer enlarging rate statistics of large-sized seamless steel pipe factory is seen, also substantially within the scope of 30%.
It is not difficult to find out by the analysis to above prior art,, therefore perforation enlarging rate
δ determines pipe diameter, while determining the size of perforation lengthening coefficient.Pipe diameter and perforation lengthening coefficient are two and compared
Important parameter.Pipe diameter is larger to pipe time effects, and the pipe diameter smaller heat time is shorter, and production efficiency is higher；
Production practices find that quality influence of the perforation lengthening coefficient on hollow billet is larger, and lengthening coefficient is bigger, and quality of hollow billet is poorer, mainly
Show that hollow billet afterbody often produces Pian Bi, iron ears or side handles of a utensil etc..
The perforation enlarging rate statistics that existing cone type piercer is used see the table below：
In prior art, in roll off angle α=15 of cone-shaped roll0, the nip angle 9 of cone-shaped roll0≤β≤120Under the conditions of, perforation
Enlarging rate δ≤30%, occurs in that the problem of light-wall pipe quality of hollow billet is poor, is mainly manifested in hollow billet afterbody and often produces Pian Bi, iron
The defects such as the ears or side handles of a utensil.
The content of the invention：
The purpose of the present invention is to overcome above-mentioned prior art not enough, and provides a kind of drilling/rolling side for producing thin-wall seamless steel pipe
Method.
Set it is a further object of the present invention to provide a kind of the special of drilling/rolling method for realizing production thin-wall seamless steel pipe
It is standby.
The problems such as Pian Bi, the iron ears or side handles of a utensil often being produced present invention mainly solves existing technology hollow billet afterbody；For improving
The production efficiency of light-wall pipe.
The content of the invention：
The technical scheme is that：A kind of drilling/rolling method for producing thin-wall seamless steel pipe, pipe from contact cone-shaped roll
Cone-shaped roll is left to hollow billet, perforation area in preparation L1, punch block L2, expanding rolling zone L3, hollow billet circle gauging zone L4 is sequentially entered, its
It is characterized in that, in described punch block L2 and expanding rolling zone L3 Liang Ge areas, correspondence top profile is divided into three deformed areas,
It is once perforated area L21, expanding area L22, Jun Bi rolling zone L23 respectively, corresponding top face angle is respectively γ 3, γ 2, γ
1, top face angle 3=γ of γ 1-（2-2.5°）；Cone-shaped roll approach cone length is LR, and cone-shaped roll entrance cone angle is λ 1；Taper
Roll exit cone length is LC, and cone-shaped roll Toe angle is λ 2,2=6 ° of λ；Roll off angle α=15 of the cone-shaped roll0, taper
The nip angle 9 of roll0≤β≤120Under the conditions of, perforation enlarging rate δ meets 30% ＜ δ≤45%.
A kind of special equipment of drilling/rolling method for producing thin-wall seamless steel pipe of the present invention is realized, is tapered roller perforation
The warp tool of machine, is made up of the cone-shaped roll of a pair of active rotations, a top and a pair of guide plates；Cloth above and below cone-shaped roll
Put, guide plate or so arrangement；It is characterized in that, four areas, perforation area in preparation L1, punch block are divided on described cone-shaped roll
L2, expanding rolling zone L3 and hollow billet circle gauging zone L4；In described punch block L2 and expanding rolling zone L3 Liang Ge areas, correspondence top is outer
Shape is divided into three deformed areas, is once perforated area L21, expanding area L22, Jun Bi rolling zone L23, corresponding top face angle respectively
The values of top face angle γ 3 in the range of respectively γ 3, γ 2, γ 1, once perforated area L21 are less than in the range of the L23 of Jun Bi rolling zones
Top face angle γ 1,3=γ of γ 1-（2-2.5°）；Cone-shaped roll approach cone length is LR, and cone-shaped roll entrance cone angle is λ 1；
Cone-shaped roll outlet cone length is LC, and cone-shaped roll Toe angle is λ 2,2=6 ° of λ.
A kind of drilling/rolling method and special equipment for producing thin-wall seamless steel pipe of the present invention and prior art phase
Than with prominent substantive distinguishing features and marked improvement：
1st, cone-shaped roll Toe angle is λ 2 design；2=6 ° of λ in 2=3.9 ° -4.6 ° of λ in prior art, the present invention；Increase λ 2
Value can meet the requirement of hollow billet asynchronous region length, the huge of equipment do not caused in existing roll exit cone length range
Transformation；
2nd, on top face angle γ 3, γ 2, γ 1 design；γ 1 adds one according to roll exit cone angle λ 2 in prior art
Space compensation angle；γ2=γ1+（0°-2.5°）, 3=γ of γ 2；3=γ of γ 1- in the present invention（2-2.5°）, the purpose is to by subtracting
Few γ 3, reduces once perforated area L21 arc radius, and then reduction LR and LC joins roll and the gap of top at pore throat,
And then the wall thickness of hollow billet is reduced as early as possible, metal is deformed in expanding area L22, Jun Bi rolling zone L23 gently, and fully roll off,
Improve quality of hollow billet；
3rd, 30% ＜ δ≤45% of the invention, in the case where hollow billet diameter Dm and hollow billet wall thickness Sm are constant, according to formula δ=（Dm-
Dp）/ Dp × 100% is calculated, and the pipe diameter Dp taken significantly reduces, and reduces the diameter of pipe, and then reduce pipe
Heat time, improve steel pipe rhythm of production；According to formulaCalculate, perforation extension system
NumberSignificantly reduce, it is to avoid the super extension phenomenon in perforation procedure, improve the Quality of Tail of steel pipe, it is to avoid hollow billet afterbody
The formation of the iron ears or side handles of a utensil, improves the quality level of steel pipe.
Brief description of the drawings：
Fig. 1 is existing cone type piercer device structure schematic diagram；
Fig. 2 is Fig. 1 front view；
Fig. 3 is Fig. 1 top view；
Fig. 4 is Fig. 1 side view；
Fig. 5 is the deformation principle figure of the present invention.
Embodiment：
For a better understanding and implementation, providing specific embodiment below in conjunction with the accompanying drawings describes the present invention in detail；Illustrated embodiment
It is only used for explaining the present invention, is not intended to limit the scope of the present invention.
Embodiment 1, referring to Fig. 1,2,3,4,5, using existing technology by the cone-shaped roll 2 of a pair of active rotations, one
Top 3 and a pair of guide plates 5 are mounted to the warp tool of cone type piercer, and cone-shaped roll is arranged about 2, and guide plate 5 or so is arranged；
Cone-shaped roll 2 is as outer warp tool, and it is to rely on frictional force that pipe 1 is drawn into pass that it, which is acted on, before driving pipe 1 in rotation
Enter, top 3 undertakes perforation and the inwall roll off of hollow billet 4 of pipe 1 as interior warp tool, and the effect of guide plate 5 is limitation hollow billet 4
Transversely deforming；It is divided into four areas, perforation area in preparation L1, punch block L2, expanding rolling zone L3 and hollow billet circle gauging zone on cone-shaped roll 2
L4；In described punch block L2 and expanding rolling zone L3 Liang Ge areas, 3 profiles of correspondence top are divided into three deformed areas, are one respectively
Secondary punch block L21, expanding area L22, Jun Bi rolling zone L23, corresponding top face angle is respectively γ 3, γ 2, γ 1, is once worn
Top face angle γ 3 in the range of porose area L21 is worth the top face angle γ 1,3=γ of γ 1- being less than in the range of the L23 of Jun Bi rolling zones
（2-2.5°）；Cone-shaped roll approach cone length is LR, and cone-shaped roll entrance cone angle is λ 1；Cone-shaped roll outlet cone length is LC,
Cone-shaped roll Toe angle is λ 2,2=6 ° of λ；Form the special equipment of the drilling/rolling of the production thin-wall seamless steel pipe of the present invention.
Thin-wall seamless steel pipe is produced using above-mentioned special equipment, its drilling/rolling method is as follows：After the contact roll 2 of pipe 1
Into perforation area in preparation L1 is once bitten, pipe continues to be rotationally advancing, into punch block L2, and pipe completes perforation in L2 areas,
Subsequently into expanding rolling zone L3, after expanding, equal wall roll off process, enter professional etiquette circle into hollow billet circle gauging zone L4, eventually become conjunction
The hollow billet 4 of lattice；By above-mentioned piercing process process, cone type piercer complete a diameter of Dp solid pipe is worn into it is straight
Footpath is the hollow hollow billet that Dm, wall thickness are Sm；In roll off angle α=15 of cone-shaped roll0, the nip angle 9 of cone-shaped roll0≤β≤120Bar
Under part, perforation enlarging rate δ meets 30% ＜ δ≤45%.
Embodiment 2, using the equipment of embodiment 1, in roll off angle α=15 of cone-shaped roll0, the nip angle 9 of cone-shaped roll0≤
β≤120Under the conditions of, with exemplified by producing hollow billet diameter Dm=524mm, hollow billet wall thickness Sm=23mm；
According to prior art, perforate enlarging rate δ values in the range of 5-30%, δ=17.5%；In prior art, cone-shaped roll outlet
2=3.9 ° of cone angle λ；γ 1 is according to cone-shaped roll Toe angle λ 2 plus a space compensation angle, 1=λ of γ 2+0.60=4.40；γ2=
γ1+（0°—2.5°）=4.40；γ3=γ2=4.40；
According to the technology of the present invention, perforate enlarging rate δ values in the range of 30-45%, δ=37.5%；Cone-shaped roll Toe angle λ 2
=6°；γ 1 is according to cone-shaped roll Toe angle λ 2 plus a space compensation angle, 1=λ of γ 2+0.50=6.60；γ2=γ1+（0°—
2.5°）=8.80；γ3=γ1-（2—2.5°）=6.60-（2—2.5°）=4.50；
By existing technology, δ=17.5%, a diameter of Dp=Dm/ of pipe（1+δ）=524/（1+17.5%）=445.9（mm）, rounding into
Standard pipe specification, Dp=450mm；Perforation lengthening coefficient：
；
By the technology of the present invention, enlarging rate δ values in the range of 30-45% of perforating, then δ=37.5%, a diameter of Dp=Dm/ of pipe（1
+δ）=524/（1+37.5%）=381.1（mm）, rounding is into standard pipe specification, Dp=380mm.Perforation lengthening coefficient：
；
Because pipe diameter from 450mm is reduced to 380mm, the heating of pipe blank time was reduced to 285 minutes by 396 minutes, production section
It is 52/hour to play by the increase of 31/hour pipes, and production capacity is improved.Hollow billet Quality of Tail is obviously improved, and seldom finds hollow billet afterbody
Iron ears or side handles of a utensil etc..
Embodiment 3, using the equipment of embodiment 1, in roll off angle α=15 of cone-shaped roll0, the nip angle 9 of cone-shaped roll0≤
β≤120Under the conditions of, with exemplified by producing hollow billet diameter Dm=430mm, hollow billet wall thickness Sm=23mm；
According to prior art, perforate enlarging rate δ values in the range of 5-30%, δ=13.1%.In prior art, cone-shaped roll outlet
2=3.9 ° of cone angle λ；γ 1 is according to cone-shaped roll Toe angle λ 2 plus a space compensation angle, 1=λ of γ 2+0.60=4.40；γ2=
γ1+（0°—2.5°）=4.40；γ3=γ2=4.40；
According to the technology of the present invention, perforate enlarging rate δ values in the range of 30-45%, δ=43.3%；Cone-shaped roll Toe angle λ 2
=6°；γ 1 is according to cone-shaped roll Toe angle λ 2 plus a space compensation angle, 1=λ of γ 2+0.50=6.60；γ2=γ1+（0°—
2.5°）=8.80；γ3=γ1-（2—2.5°）=6.60-（2—2.5°）=4.50；
Perforated enlarging rate δ values in the range of 5-30%, then δ=13.1%, a diameter of Dp=Dm/ of pipe according to prior art（1+δ）=
430/（1+13.1%）=380.2（mm）, rounding is into standard pipe specification, Dp=380mm.Perforation lengthening coefficient：
；
According to the technology of the present invention, enlarging rate δ values in the range of 35-45% of perforating, then δ=43.3%, a diameter of Dp=Dm/ of pipe
（1+δ）=430/（1+43.3%）=300.1（mm）, rounding is into standard pipe specification, Dp=300mm.Perforation lengthening coefficient：
；
Because pipe diameter from 380mm is reduced to 300mm, the heating of pipe blank time was reduced to 200 minutes by 285 minutes, production section
Play increases to 85/hour by 52/hour pipes, and production capacity is increased substantially.Hollow billet Quality of Tail is obviously improved, and seldom finds hair
Pipe afterbody iron ears or side handles of a utensil etc..
Claims (2)
1. a kind of drilling/rolling method for producing thin-wall seamless steel pipe, pipe leaves taper to hollow billet from contact cone-shaped roll and rolled
Roller, sequentially enters perforation area in preparation L1, punch block L2, expanding rolling zone L3, hollow billet circle gauging zone L4, it is characterised in that described
In punch block L2 and expanding rolling zone L3 Liang Ge areas, correspondence top profile is divided into three deformed areas, is once perforated area respectively
L21, expanding area L22, Jun Bi rolling zone L23, corresponding top face angle is respectively γ 3, γ 2, γ 1, top face angle γ 3=
γ1-（2-2.5°）；Cone-shaped roll approach cone length is LR, and cone-shaped roll entrance cone angle is λ 1；Cone-shaped roll outlet cone length is
LC, cone-shaped roll Toe angle is λ 2,2=6 ° of λ；Roll off angle α=15 of the cone-shaped roll0, the nip angle 9 of cone-shaped roll0≤β
≤120Under the conditions of, perforation enlarging rate δ meets 30% ＜ δ≤45%.
It is that tapered roller is worn 2. realizing a kind of special equipment of drilling/rolling method for producing thin-wall seamless steel pipe of claim 1
The warp tool of hole machine, by the cone-shaped roll of a pair of active rotations（2）, a top（3）With a pair of guide plates（5）Composition；Taper
Roll（2）Arrange up and down, guide plate（5）Left and right is arranged；Characterized in that, described cone-shaped roll（2）On be divided into four areas, perforate
Area in preparation L1, punch block L2, expanding rolling zone L3 and hollow billet circle gauging zone L4；Described punch block L2 and expanding rolling zone L3 two
Qu Zhong, correspondence top（3）Profile is divided into three deformed areas, is once perforated area L21, expanding area L22, Jun Bi rolling zone respectively
L23, corresponding top face angle be respectively top face angle γ 3 in the range of γ 3, γ 2, γ 1, once perforated area L21 be worth it is small
Top face angle γ 1 in the range of the L23 of Jun Bi rolling zones, 3=γ of γ 1-（2-2.5°）；Cone-shaped roll approach cone length is LR,
Cone-shaped roll entrance cone angle is λ 1；Cone-shaped roll outlet cone length is LC, and cone-shaped roll Toe angle is λ 2,2=6 ° of λ.
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|---|---|---|---|
| CN201710480752.6A CN107138532B (en) | 2017-06-22 | 2017-06-22 | A kind of drilling/rolling method and special equipment producing thin-wall seamless steel pipe |
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|---|---|---|---|
| CN201710480752.6A CN107138532B (en) | 2017-06-22 | 2017-06-22 | A kind of drilling/rolling method and special equipment producing thin-wall seamless steel pipe |
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| CN107138532B CN107138532B (en) | 2018-11-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326045A (en) * | 2018-04-09 | 2018-07-27 | 北京科技大学 | A kind of design method of the big expanding rolling guide plate of Mannesmann piercing machine |
| CN112439787A (en) * | 2019-08-30 | 2021-03-05 | 鑫鹏源智能装备集团有限公司 | Method for rolling large diameter of tubular billet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081210A (en) * | 1994-06-10 | 1996-01-09 | Sumitomo Metal Ind Ltd | Device and method for manufacturing seamless tube |
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| JPH081210A (en) * | 1994-06-10 | 1996-01-09 | Sumitomo Metal Ind Ltd | Device and method for manufacturing seamless tube |
| CN1135382A (en) * | 1995-05-10 | 1996-11-13 | 住友金属工业株式会社 | Method for boring/rolling seamless steel pipe and apparatus thereof |
| CN2551367Y (en) * | 2002-03-28 | 2003-05-21 | 宝山钢铁股份有限公司 | Mandrel for roll piercing large expanding |
| US20060174670A1 (en) * | 2003-06-06 | 2006-08-10 | Chihiro Hayashi | Piercing method for manufacturing of seamless pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108326045A (en) * | 2018-04-09 | 2018-07-27 | 北京科技大学 | A kind of design method of the big expanding rolling guide plate of Mannesmann piercing machine |
| CN108326045B (en) * | 2018-04-09 | 2020-01-10 | 北京科技大学 | Design method of guide plate for large diameter expansion rolling of two-roller skew rolling piercer |
| CN112439787A (en) * | 2019-08-30 | 2021-03-05 | 鑫鹏源智能装备集团有限公司 | Method for rolling large diameter of tubular billet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107138532B (en) | 2018-11-27 |
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