EP0156922B2 - Cross helical rolling mill for seamless steel tubes. - Google Patents

Cross helical rolling mill for seamless steel tubes. Download PDF

Info

Publication number
EP0156922B2
EP0156922B2 EP19840903453 EP84903453A EP0156922B2 EP 0156922 B2 EP0156922 B2 EP 0156922B2 EP 19840903453 EP19840903453 EP 19840903453 EP 84903453 A EP84903453 A EP 84903453A EP 0156922 B2 EP0156922 B2 EP 0156922B2
Authority
EP
European Patent Office
Prior art keywords
drive
roller
shoe
rolling mill
shoes
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.)
Expired - Lifetime
Application number
EP19840903453
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0156922A4 (en
EP0156922A1 (en
EP0156922B1 (en
Inventor
Shiro Kawasaki Steel Corp. C.W. Hatakeyama
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15992233&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0156922(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0156922A1 publication Critical patent/EP0156922A1/en
Publication of EP0156922A4 publication Critical patent/EP0156922A4/en
Publication of EP0156922B1 publication Critical patent/EP0156922B1/en
Application granted granted Critical
Publication of EP0156922B2 publication Critical patent/EP0156922B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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

Definitions

  • This invention relates to a cross helical rolling mill used in manufacturing seamless steel pipe.
  • a cross helical rolling mill in which two work rolls each having an inclined inlet face and an inclined outlet face are inclinedly (in a state of crossing each other as viewed from above) disposed at a predetermined lead angle and guide shoes such as fixed shoes, disc shoes and roller shoes are interposed between the work rolls.
  • Fig. 1 is a front view showing a work roll 1, a plug 2, a shell 3 and a fixed shoe 4 in a cross helical rolling mill.
  • the shell 3 is drawn by the circumferential speed of the work roll 1 in the tangential line thereof and makes slips, impinging on the fixed shoe 4, whereby, on a shoe surface of the fixed shoe 4, there occur worn portions 5A, 5B and 5 as shown in Figs. 2 and 3.
  • designated at 5A is a worn portion when a thin wall shell is rolled
  • denoted at 5B is a worn portion when a thick wall shell is rolled.
  • fine cracks deemed to be caused by the thermal stress.
  • the fixed shoe 4 is formed from a high class material having a satisfactionaly high wear resistance. This amounts to a very high percentage of the production cost of the seemless steel pipe.
  • Fig. 4 is a front view showing disc shoes 6 in the cross helical rolling mill, in which each disc shoe 6 is supported on a bearing 8 through a shaft 7 and driveable by a driving motor 9.
  • the disc shoe 6 tends to be considerably increased in its diameter, e.g. to reach about three meters, whereby the equipment as a whole becomes long and large, so that it is impossible to apply such disc shoes to the conventional equipment in terms of space.
  • the ratio is about 6 to 1.
  • JP-B2-58/48243 discloses a cross helical rolling mill, wherein work rolls, each having an inclined inlet face and an inclined outlet face, are inclinedly disposed at a predetermined work roll lead angle, and a pair of rolls are positioned adjacent to the work rolls.
  • Fig. 5 is a front view showing roller shoes 10 in a known cross helical rolling mill.
  • roller shoes 10 are idle rollers which rotate by themselves, but are not forcedly driven.
  • the roller shoes 10 are the idle rollers, whereby when the shell 3 runs into a gap formed between the work rolls 1 and the roller shoes 10, the roller shoes 10 cannot draw out the shell 3, so that the rolling may be stopped to thereby cause a sticker phenomenon.
  • a guide plate 11 between the work rolls 1 and the roller shoes 10.
  • the same disadvantage as with the fixed shoes occurs, and the effects by use of the roller shoes 10 are not obtainable.
  • the length of the roller shoe 10 is made substantially equal to that of the fixed shoe, an insufficient mechanical strength of a shaft to a thrust force acting on the roller shoe 10 occurs, so that the provision of back-up rolls 12 is required.
  • a further cross-helical rolling mill is disclosed in DE-B-1427970.
  • the mill disclosed therein has work rolls having inclined inlet and outlet faces which are disposed at a predetermined lead angle, and opposed rollers positioned adjacent the work rolls above and below the workpiece. These rollers are preferably driven at a surface speed at least as great as the speed imparted to the workpiece, and may be skewed to impart the same axial movement as is imparted to the workpiece by the work rolls.
  • the present invention provides a cross helical rolling mill for producing seamless steel tubes comprising, work rolls, each having an inclined inlet face and an inclined outlet face, inclinedly disposed at a predetermined work roll lead angle relative to an axis along which, in use, a shell being rolled extends, a pair of drive-roller shoes positioned adjacent to the work rolls, each drive-roller shoe having an inclined inlet face and an inclined outlet face and being inclinedly disposed at a predetermined drive-roller shoe lead angle of 3° or more with respect to the said axis, in use, the drive-roller shoes being actively rotationally driven at a surface speed greater than the circumferential speed of said work rolls, one of the drive-roller shoes being mounted on a support having a wedge-shaped surface thereon, cooperable with a movable tapered base part whereby movement of the base part effects movement of the drive roller shoe towards or away from said axis.
  • the forcedly driving force of said drive roller shoes is set at a value such that, in use, the tangential force between a shell being rolled and each drive-roller shoe is 3% or more of the reaction force of each drive-roller shoe.
  • Fig. 6 is a side view showing an embodiment of the cross helical rolling mill according to the present invention and Fig. 7 is a front view showing the conditions of rolling by the cross helical rolling mill.
  • each of the work rolls 21 has an inclined inlet face and an inclined outlet face, inclinedly disposed at a work roll lead angle of 10° to 12° for example, and makes a billet 25 on a trough 24 advanceable in the axial direction in a state of being rotatable in the circumferential direction. Additionally, the billet 25 on the trough 24 being in a state of being guided on a cannon 26, is pushed by pusher 27 to be bitten into a space between the both work rolls 21.
  • drive-roller shoes 28 are located at two positions in the vertical direction between the both work rolls 21.
  • Each of the drive-roller shoes 28 has an inclined inlet face at which the outer diameter of the shoe is reduced from the axially central portion to the inlet end thereof, and an inclined outlet face at which the outer diameter of the shoe is reduced from the axially central portion to the outlet end thereof.
  • each drive-roller shoe 28 is inclinedly disposed at a predetermined drive roller shoe lead angle of 3° to 4° for example, to the axial direction of a shell 29, so that the circumferential surface of the drive-roller shoe 28 can obtain a component of speed of the shell 29 in the proceeding direction thereof.
  • the drive-roller show 28 has an inclined inlet face and an inclined outlet face, whereby, the shell 29 is prevented from coming into contact with the drive-roller shoe 28 at the same position prior to the work roll 21, so that the occurrence of the sticker phenomena can be suppressed.
  • the drive-roller shoe 28 is inclinedly disposed at the predetermined drive roller shoe lead angle, whereby the occurrence of slip phenomena becomes less than 10%.
  • the rate of occurrence of slip phenomena is low as compared with the conventional fixed shoe and disc shoe, whereby the efficiency of piercing work is improved, so that a cycle time can be shortened.
  • the rate of occurrence of slip phenomena of less than 10% results in little occurrence of slip phenomena and improved service life of the shoes.
  • the shell 29 is obtainable without the surface of the shell 29 being damaged by the drive-roller shoe 28.
  • the drive roller shoes 28 are installed in such a manner as will be described hereunder. More specifically, a section, where the drive-roller shoes 28 are installed, is interposed by the work rolls 21, on the inlet side of the section, there are provided a cannon 26, universal joints for driving the work rolls, and the like, and, on the outlet side of the section, there are provided a plug 23, a plug bar support and the like, in that the space is much limited. In consequence, it is very difficult to install the drive-roller shoes 28 and the driving devices in such limited space as described above.
  • the minimum essential length of the guide shoe may be about 2/ 3 of a length which has heretofore been required of the guide shoe even when the wall thickness of the shell is small.
  • the length of the drive-roller shoe 28 is shortened, even a small diameter shaft has a satisfactory bending strength, whereby the back-up rolls for the drive-roller shoes as shown in Fig. 5 may be dispensed with, the bearings are rendered compact in size and spacing from the cannon 26 on the inlet side is permitted, so that driving is facilitated.
  • a shaft 44 of the drive-roller shoe 28 is fixed by bearing 32 and support 33, and a wedge 43 is fitted by a bolt 41 so that a base 43 of the support 33 can be easily detached.
  • a screwshaft 45 is rotated by a hydraulic motor 39 to move a tapered base 37, whereby a lower frame 35 is vertically moved, so that a position of the top surface of the drive-roller shoe 28 can be finely adjusted.
  • the locking after the ajustment is effected by hydraulic cylinders 42 (two set).
  • the drive-roller shoe 28 is forcedly drivable by a driving device, e.g. a hydraulic motor 31 through the universal joint 30.
  • the driving device may be an electric motor.
  • the billet 25 on the trough 24 is pushed by the pusher 27 to be bitten into the space between the both work rolls 21, further, impinges on the plug 23, and is pierced and rolled.
  • the shell 29 thus pierced and rolled is flared and comes into abutting contact with the upper and the lower drive-roller shoes 28.
  • the drive-roller shoes 28 are forcedly driven at a speed faster than the circumferential speed of the work rolls 21. In consequence, even when the shell 29 has a thin wall thickness, the shell 29 does not run into the space between the drive-roller shoes 28 and the work rolls 21, thus avoiding any stick phenomenon.
  • the rolled shell 29 is drawn in a direction tangential to the work roll 21 and tends to run into the space between the work rolls 21 and the drive-roller shoes 28.
  • the drive-roller shoes 28 are rotating at a speed somewhat faster than the circumferential speed of the work roll 21, whereby the shell 29 comes into abutting contact with the drive roller shoes 28. Due to the friction generated between the shell 29 and the drive-roller shoes 28 at this time, the speed of the shell 29 does not reach the circumferential speed of the drive-roller shoe 28, and, rather the circumferential speed of the shoes 28 tends to fall towards the speed of the shell 29.
  • the shoes 28 are rotating at a speed faster than the shell 29, the tangential forces of the shoes draw the shell 29.
  • the shell is brought to the opposite side, i.e. the side of the work rolls 21, so that the smooth rolling can be effected.
  • the conventional shell runs into the space between the work rolls and the shoes to cause the sticker phenomenon which stops the rolling.
  • the front portion of the tail end of the shell has been rolled, a force in the axial direction of the shell does not act thereon, accordingly the stress in the circumferential direction is high, the diameter of the shell tends to increase, the shell is liable to run into the space, and the flaring tends to occur.
  • the results of experiments prove that there is a predetermined relationship between the occurrence of stickers, the occurrence of flares and tangential force/shoe reaction force.
  • the reaction force means a pressing force by the shell in a direction indicated by A in Fig. 7
  • the tangential force is a frictional force between the shell and the roller shoes, defined by the radius of torque/roller shoe, namely a force in a direction indicated by B in Fig. 7.
  • the drive-roller shoes being drivable and each having an inclined inlet face and an inclined outlet face are inclinedly disposed at positions adjacent the work rolls at a predetermined drive roller shoe lead angle.
  • the cross helical rolling mill having a construction rendered compact in size, can stably support the shell during rolling to effect smooth rolling.
  • the present invention is very easily applicable to the existing cross helical rolling mills, whereby the amount of initial investment can be reduced, thus proving highly economical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Metal Rolling (AREA)
EP19840903453 1983-09-24 1984-09-18 Cross helical rolling mill for seamless steel tubes. Expired - Lifetime EP0156922B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17521183A JPS6068104A (ja) 1983-09-24 1983-09-24 傾斜式圧延機
JP175211/83 1983-09-24

Publications (4)

Publication Number Publication Date
EP0156922A1 EP0156922A1 (en) 1985-10-09
EP0156922A4 EP0156922A4 (en) 1986-04-02
EP0156922B1 EP0156922B1 (en) 1989-06-07
EP0156922B2 true EP0156922B2 (en) 1994-03-02

Family

ID=15992233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840903453 Expired - Lifetime EP0156922B2 (en) 1983-09-24 1984-09-18 Cross helical rolling mill for seamless steel tubes.

Country Status (5)

Country Link
EP (1) EP0156922B2 (enrdf_load_stackoverflow)
JP (1) JPS6068104A (enrdf_load_stackoverflow)
CA (1) CA1251954A (enrdf_load_stackoverflow)
DE (1) DE3478580D1 (enrdf_load_stackoverflow)
WO (1) WO1985001458A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489522A (zh) * 2011-12-15 2012-06-13 太原重工股份有限公司 一种二辊轧管机机架

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62104611A (ja) * 1985-11-01 1987-05-15 Kawasaki Steel Corp 傾斜圧延機の運転制御方法
JPH0534801Y2 (enrdf_load_stackoverflow) * 1987-06-09 1993-09-03
JPH0270338A (ja) * 1988-09-02 1990-03-09 Sumitomo Metal Ind Ltd スパイラルフィン付き金属管の製造方法
JPH0270339A (ja) * 1988-09-02 1990-03-09 Sumitomo Metal Ind Ltd スパイラルフィン付き金属管の製造方法
US5223460A (en) * 1988-09-20 1993-06-29 The Dow Chemical Company High hardness, wear resistant materials
US5256608A (en) * 1988-09-20 1993-10-26 The Dow Chemical Company High hardness, wear resistant materials
DE69208443T2 (de) * 1991-12-28 1996-09-26 Sumitomo Metal Ind Schrägwalzverfahren und Schrägwalzwerk
US5477719A (en) * 1991-12-28 1995-12-26 Sumitomo Metal Industries, Ltd. Inclined-rolling method and inclined rolling apparatus
MX2008012235A (es) * 2006-03-31 2008-10-07 Sumitomo Metal Ind Metodo de fabricacion de tuberia o tubo sin costura.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848243B2 (ja) * 1978-10-13 1983-10-27 新日本製鐵株式会社 管圧延機
JPS6059042B2 (ja) * 1981-04-10 1985-12-23 住友金属工業株式会社 継目無鋼管の製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489522A (zh) * 2011-12-15 2012-06-13 太原重工股份有限公司 一种二辊轧管机机架

Also Published As

Publication number Publication date
EP0156922A4 (en) 1986-04-02
JPH0224602B2 (enrdf_load_stackoverflow) 1990-05-30
DE3478580D1 (en) 1989-07-13
EP0156922A1 (en) 1985-10-09
CA1251954A (en) 1989-04-04
EP0156922B1 (en) 1989-06-07
JPS6068104A (ja) 1985-04-18
WO1985001458A1 (en) 1985-04-11

Similar Documents

Publication Publication Date Title
EP0156922B2 (en) Cross helical rolling mill for seamless steel tubes.
US4086801A (en) H-shape metallic material rolling process
US3823593A (en) Method of rolling metal sheet articles between the driven rolls of the roll mill
RU2057601C1 (ru) Способ горячей прокатки стальной полосы и установка для его осуществления
EP0754503B1 (en) Method and apparatus for piercing seamless metal pipe
US4406141A (en) Straightening apparatus for steel pipes and the like
US6216517B1 (en) Precision-rolling process
US4153982A (en) Method and apparatus for forming cross ribbed pipes
US4289011A (en) Continuous pipe rolling process
EP0142577A1 (en) Roller leveler driving apparatus
EP0195583B1 (en) Control of a cross helical rolling mill
CN2164928Y (zh) 三辊式螺杆冷轧机
SU1215776A1 (ru) Валковый комплект
US3352140A (en) Rolling mill construction
US4395896A (en) Rotary rolling mill and method for rolling of tubular products
SU1318323A1 (ru) Составные валки профилегибочного стана
SU766679A1 (ru) Многовалкова прокатна клеть
US2760546A (en) Apparatus for making a metallic belt
CN118650015A (zh) 一种用于炼钢连铸的批量热轧装置
US3213661A (en) Method of and apparatus for producing a wide metal strip by rolling
SU1276383A1 (ru) Способ прокатки заготовок
SU789167A1 (ru) Способ прокатки сортовых заготовок
JP2996124B2 (ja) 継目無金属管の穿孔圧延方法
SU1068186A1 (ru) Планетарный прокатный стан
US4580323A (en) Stand roller assembly for a torsionless finishing block of a continuous wire rolling mill

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19850914

A4 Supplementary search report drawn up and despatched

Effective date: 19860402

17Q First examination report despatched

Effective date: 19871124

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3478580

Country of ref document: DE

Date of ref document: 19890713

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: KOCKS TECHNIK GMBH & CO.

Effective date: 19900302

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19940302

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): DE FR GB

ET3 Fr: translation filed ** decision concerning opposition
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010911

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010919

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011001

Year of fee payment: 18

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020918

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020918

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030603

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST