CN201154367Y - Five-frame restraint core rod tandem mill for reducing consume of roller and core rod - Google Patents
Five-frame restraint core rod tandem mill for reducing consume of roller and core rod Download PDFInfo
- Publication number
- CN201154367Y CN201154367Y CNU2007201319217U CN200720131921U CN201154367Y CN 201154367 Y CN201154367 Y CN 201154367Y CN U2007201319217 U CNU2007201319217 U CN U2007201319217U CN 200720131921 U CN200720131921 U CN 200720131921U CN 201154367 Y CN201154367 Y CN 201154367Y
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- frame
- arc
- pass
- disengaging
- retained mandrel
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Abstract
The utility model relates to a five-frame retained mandrel continuous rolling mill which is beneficial to reducing the consumption of a roll and a mandrel. The five-frame retained mandrel continuous rolling mill can reduce the roll force of the frames, retain the retained force of a rack, reduce the ton steel consumption of the rolls and the mandrel and save the tool cost. An ellipse-round pass system is selected as the pass of the five-frame retained mandrel continuous rolling mill; a fourth frame and a fifth frame of the five-frame retained mandrel continuous rolling mill respectively adopt the arc side wall round pass with no eccentricity; besides, the passes of the fourth frame and the fifth frame are the same. The five-frame retained mandrel continuous rolling mill is characterized in that a first frame to a third frame of the five-frame retained mandrel continuous rolling mill adopt the ellipse pass with eccentricity; the eccentricity of the next frame is half that of the front frame; the eccentricity of the first frame is set to be 0.645 times as the thickness of the thinnest wall of the steel tube rolled by the design passes; the connection angle between the second frame and the third frame is set to be 14 degrees; the connection angle between the fourth frame and the fifth frame is set to be 9 degrees.
Description
(1) technical field
The utility model relates to the tandem rolling unit of processing seamless steel pipe, belongs to the machining equipment field, is specially to be beneficial to the five frame retained mandrel tandem mills that reduce roll, plug consumption.
(2) background technology
Because restraint tandem rolling pipe unit has the automaticity height, production efficiency and recovery rate of iron height are produced its wall thickness accuracy of steel pipe characteristics preferably, worldwide are used widely.At present domestic the type continuous rolling-tube unit more than ten covers that had, and the whole imports of nucleus equipment tandem mill and processing technology, the pass design is first a slightly off-centre, all the other frames are circular arc sidewall circular hole without acceptance of persons, the most outstanding characteristics of this type of pass are that roll and plug consumption are bigger, so it is all quite big to have the storage level of steel pipe's production producer plug of retained mandrel continuous rolling-tube unit, this causes bigger financial burden to enterprise, as Italian Dalmine steel tube factory only the plug deposit just reach more than 100,000,000 Euros.
(3) summary of the invention
In order to overcome existing its roll of unit, shortcoming that the plug wear extent is big, the utility model provides a kind of five frame retained mandrel tandem mills that reduce roll, plug consumption that are beneficial to, it can reduce the loss per ton steel of roll-force, restraint tooth bar restraint power, reduction roll and the plug of frame, has saved the instrument cost.
Its technical scheme is such: a kind of five frame retained mandrel tandem mills that reduce roll, plug consumption that are beneficial to, its pass is selected ellipse-circular hole system, and pass breaks away from arc R2, the second disengaging arc R4, connection arc R5 and corresponding roll gap S by bottom land arc R1, first and forms; Connect arc and roll gap place and set up knuckle; Wherein a, bottom land arc and the first disengaging arc are tangent; It is tangent that b, first breaks away from arc and bottom land arc and the second disengaging arc; C, second breaks away from the arc and the first disengaging arc inscribe, with to be connected arc circumscribed; D, connection arc are the public circle of contact arcs of the second disengaging arc and pass center line; The 4th frame of described five frame retained mandrel tandem mills, the 5th frame adopt circular arc sidewall circular hole without acceptance of persons respectively, and the 4th frame is identical with the 5th frame pass, it is characterized in that: first frame to the, three frames of described five frame retained mandrel tandem mills adopt and have eccentric oval groove, next frame eccentric throw is got half of a frame, the eccentric throw of first frame thick 0.645 times of the thin-walled of institute's rolled steel tube that is set to form a groove, the joint angle of second frame, the 3rd frame is set to 14 °; The joint angle of the 4th frame, the 5th frame is set to 9 °.
In the said structure of the present utility model, the off-centre design of first frame to the, three frames, strengthened the lateral flow of metal in the most concentrated frame of roll-force, effectively reduce the rolling load of tandem mill, the surperficial normal pressure and the frictional force of plug, reduced the loss per ton steel of roll and plug, saved instrument use cost, cost of fund, this external the 4th frame, the 5th frame adopt the circular hole design, have guaranteed that the dimensional accuracy of production seamless steel pipe satisfies the standard-required of all kinds of steel pipes.
(4) description of drawings
Fig. 1 is the pass structure schematic diagram of tandem rolling unit.
(5) specific embodiment
See Fig. 1, the utility model is selected ellipse-circular hole system, and pass breaks away from arc R2, the second disengaging arc R4, connection arc R5 and corresponding roll gap S by bottom land arc R1, first and forms; Connect arc and roll gap place and set up knuckle; Wherein a, bottom land arc and the first disengaging arc are tangent; It is tangent that b, first breaks away from arc and bottom land arc and the second disengaging arc; C, second breaks away from the arc and the first disengaging arc inscribe, with to be connected arc circumscribed; D, connection arc are the public circle of contact arcs of the second disengaging arc and pass center line; In the five frame retained mandrel tandem mills, first frame to the, three frames adopt and have eccentric oval groove, next frame eccentric throw ECC gets half of a frame, the eccentric throw ECC of first frame thick 0.645 times of the thin-walled of institute's rolled steel tube that is set to form a groove, the joint angle of second frame, the 3rd frame is provided with α
4It is 14 °; Four, the 5th frame adopts circular arc sidewall circular hole without acceptance of persons, and the 4th frame is identical with the 5th frame pass, the joint angle α of the 4th frame, the 5th frame
4Be set to 9 °.Carry out parameter configuration according to pass series during the processing steel pipe, by the external diameter of tandem mill rolled steel tube and the maximum ratio of wall thickness (D/t) is 42.5 to calculate design and can roll minimum wall thickness (MINI W.), calculate the total coefficient of elongation, each frame lengthening coefficient of reasonable distribution, it is long-pending that successive computations goes out each frame outlet steel tube section, determines each frame pass height, calculates corresponding each frame pass relevant parameter, concrete computational methods belong to the market prior art, α among Fig. 1
1Be the first disengaging angle, α
3Be the second disengaging angle, C1, C2, C4, C5 represent the center of circle of R1, R2, R4, R5 respectively, and R10 represents the lead angle of 10mm.
Calculation of parameter during below in conjunction with case description processing steel pipe
The design of five frame retained mandrel tandem rolling units, 192 continuous rolling passes
1. design the calculating of rolling minimum wall thickness (MINI W.) and an off-centre: S
Min=192mm ÷ 42.5=4.5mm
ECC＝4.5*0.645＝2.9mm
2. the calculating of the total coefficient of elongation: μ=F
m/ F
z≈ 3.652
3. each frame lengthening coefficient distributes: μ
1=1.590
μ
2＝1.535
μ
3＝1.301
μ
4＝1.131
μ
5＝1.017
4. each frame sectional area calculates: F
1=F
m/ μ
1≈ 6088mm
2
F
2＝F
1/μ
2≈3966mm
2
F
3＝F
2/μ
3≈3048mm
2
F
4＝F
3/μ
4≈2695mm
F
5＝F
4/μ
5≈2650mm
5. each frame pass parameter is definite: long-pending by the outlet steel tube section, determine each frame pass height, and calculate corresponding each frame pass relevant parameter such as table 1.
Table 1 192 parameter list of forming a groove
| 1# | 2# | 3# | 4# | 5# | |
| ECC | 2.90 | 1.45 | 0.72 | 0.00 | 0.00 |
| R5 | 55.50 | 40.85 | 32.95 | 17.90 | 17.90 |
| R4 | 255.25 | 244.25 | 89.200 | 108.00 | 108.00 |
| R2 | 255.25 | 244.25 | 192.40 | 168.00 | 168.00 |
| R1 | 102.10 | 97.70 | 96.20 | 96.00 | 96.00 |
| α4 | 16.00 | 14.00 | 14.00 | 9.00 | 9.00 |
| α3 | 21.21 | 24.19 | 33.70 | 33.70 | |
| α1 | 35 | 35 | 38 | 40 | 40 |
| S | 25 | 25 | 20 | 16 | 16 |
3
Use continuous rolling pass to produce the petroleum casing pipe of Φ 139.7mm * 7.72mm * 11.3～11.8m, produce back steel pipe measured data completely and see Table 2
The contrast of table 2 production tube wall thickness measured data
Use this pass to produce tandem rolling rolling system number more than 6000, every rolling number average of corresponding plug is just carrying out the secondary reparation more than 3500, compare with domestic similar enterprise and reduce tool and mould consumption greatly.
Claims (1)
1, be beneficial to and reduce by the five frame retained mandrel tandem mills that roll, plug consume, its pass is selected ellipse-circular hole system, and pass is broken away from arc R2, second and breaks away from arc R4, connected arc R5 and corresponding roll gap S forms by bottom land arc R1, first; Connect arc and roll gap place and set up knuckle; Wherein a, bottom land arc and the first disengaging arc are tangent; It is tangent that b, first breaks away from arc and bottom land arc and the second disengaging arc; C, second breaks away from the arc and the first disengaging arc inscribe, with to be connected arc circumscribed; D, connection arc are the public circle of contact arcs of the second disengaging arc and pass center line; The 4th frame of described five frame retained mandrel tandem mills, the 5th frame adopt circular arc sidewall circular hole without acceptance of persons respectively, and the 4th frame is identical with the 5th frame pass, it is characterized in that: first frame to the, three frames of described five frame retained mandrel tandem mills adopt and have eccentric oval groove, next frame eccentric throw is got half of a frame, the eccentric throw of first frame thick 0.645 times of the thin-walled of institute's rolled steel tube that is set to form a groove, the joint angle of second frame, the 3rd frame is set to 14 °; The joint angle of the 4th frame, the 5th frame is set to 9 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201319217U CN201154367Y (en) | 2007-12-25 | 2007-12-25 | Five-frame restraint core rod tandem mill for reducing consume of roller and core rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201319217U CN201154367Y (en) | 2007-12-25 | 2007-12-25 | Five-frame restraint core rod tandem mill for reducing consume of roller and core rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201154367Y true CN201154367Y (en) | 2008-11-26 |
Family
ID=40102157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201319217U Expired - Lifetime CN201154367Y (en) | 2007-12-25 | 2007-12-25 | Five-frame restraint core rod tandem mill for reducing consume of roller and core rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201154367Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722190B (en) * | 2009-11-12 | 2012-08-22 | 无锡西姆莱斯石油专用管制造有限公司 | Process for treating hot-rolled capillary pipe |
| CN106944484A (en) * | 2017-03-27 | 2017-07-14 | 内蒙古包钢钢联股份有限公司 | A kind of method that mandrel mill roll hides plug |
| CN112588828A (en) * | 2020-12-18 | 2021-04-02 | 黑龙江建龙钢铁有限公司 | Non-standard hole type system |
-
2007
- 2007-12-25 CN CNU2007201319217U patent/CN201154367Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722190B (en) * | 2009-11-12 | 2012-08-22 | 无锡西姆莱斯石油专用管制造有限公司 | Process for treating hot-rolled capillary pipe |
| CN106944484A (en) * | 2017-03-27 | 2017-07-14 | 内蒙古包钢钢联股份有限公司 | A kind of method that mandrel mill roll hides plug |
| CN106944484B (en) * | 2017-03-27 | 2018-10-12 | 内蒙古包钢钢联股份有限公司 | A kind of method that mandrel mill roll hides plug |
| CN112588828A (en) * | 2020-12-18 | 2021-04-02 | 黑龙江建龙钢铁有限公司 | Non-standard hole type system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081126 Effective date of abandoning: 20071225 |