EP0072765A1 - Vorrichtung zum Werkzeugwechseln an Pilgerschrittwalzwerken - Google Patents

Vorrichtung zum Werkzeugwechseln an Pilgerschrittwalzwerken Download PDF

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Publication number
EP0072765A1
EP0072765A1 EP82420109A EP82420109A EP0072765A1 EP 0072765 A1 EP0072765 A1 EP 0072765A1 EP 82420109 A EP82420109 A EP 82420109A EP 82420109 A EP82420109 A EP 82420109A EP 0072765 A1 EP0072765 A1 EP 0072765A1
Authority
EP
European Patent Office
Prior art keywords
rolling mill
cylinders
plane
frame
axes
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
Application number
EP82420109A
Other languages
English (en)
French (fr)
Other versions
EP0072765B1 (de
Inventor
François Grandemange
Michel Couturier
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.)
Vallourec SA
Original Assignee
Vallourec SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vallourec SA filed Critical Vallourec SA
Priority to AT82420109T priority Critical patent/ATE17664T1/de
Publication of EP0072765A1 publication Critical patent/EP0072765A1/de
Application granted granted Critical
Publication of EP0072765B1 publication Critical patent/EP0072765B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • 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
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/14—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by pivotally displacing

Definitions

  • the tool change device object of the invention, relates to rolling mills with crawl steps intended to laminate long pieces such as tubes or bars, or similar elements. Although it can also be applied to rolling mills with hot vocational steps, it more particularly relates to rolling mills with cold vocational steps.
  • the cage supporting the rolls of the rolling mill is moved alternately with respect to the product to be rolled in synchronism with the rotation of the cylinders, while the product to be rolled is intermittently advanced in the passage between the cylinders.
  • the working rolls of these rolling mills consist of rolled rolls in chocks generally carried by the cage which, moved in an alternating movement along the rolling axis, ensures by fixed racks the rotation of the rolls on the product to laminate and strictly maintains these rolls in position, by opposing by its structure the efforts to separate said rolls during rolling.
  • a first method consists in manually intervening on the standstill cage positioned in the rolling mill. In the case of hoop cylinders, it is then possible, without removing the cylinder block, to remove the hoops. This intervention is delicate and dangerous because of the confinement of the device, the environment linked to the lubrication of the device and the weight of the parts to be handled. Furthermore, since we are already working on the stand of the rolling mill, we cannot proceed simultaneously on the stand or in the vicinity of it to other operations for changing auxiliary tools, such as tube clamps, etc ... which has the effect of extending the overall tool change time.
  • Another known method consists, when the rolling mill is stopped, the assembly of the two working rolls with their chocks being integral, to fix this assembly on a frame which slides laterally, relative to the rolling mill.
  • This frame most often permanently associated with the rolling mill, takes the assembly of the two cylinders in the rolling mill stand and after having released it from the cage, moves it laterally relative to the rolling mill.
  • This known device greatly facilitates the maintenance of rolling mills by allowing the change of part or part of the working rolls outside the stand of the rolling mill proper.
  • the two working cylinders are kept superimposed and mechanically secured one above the other, as in their working position, in the cage. To have access to the lower working cylinder, it is necessary to remove the entire upper cylinder with its chocks and its tools. It is then necessary to transport to the tool shop, the assembly of the two mounted cylinders in order to change the cylinders.
  • the object of the present invention is an improved device making it possible to change all or part of the working rolls even more easily, in particular in the case of rolls comprising hoops or shells.
  • This invention consists of a rolling mill with successive steps comprising a frame associated with the rolling mill which slides laterally with respect to said rolling mill and thus allows the extraction of the integral assembly of the cylinders and their annexes, tilting means being provided and arranged to so as to be able to act on this frame on which is fixed all the cylinders and their annexes, so as to tilt the plane which passes through the axes of the cylinders until this plane reaches the desired inclination.
  • the tilting means make it possible to tilt the plane while retaining the imitation orientation of the axes of the cylinders.
  • we tilt the. plane to the horizontal or to the vicinity of the horizontal.
  • tilting means can be a cradle mounted either on rollers which move on rails having an appropriate curvature, or on an axis around which it can pivot or any other known means allowing a rotation associated or not with a translation of the passing plane. by the axis of the cylinders.
  • the figures and the example below describe in a nonlimiting manner a particular embodiment of the invention.
  • Figure 4 shows the same device in side view and in section through the median plane AA of Figure 2 after tilting the frame, the axes of the working rolls then being in a horizontal plane for changing the hoops.
  • FIG 1 there is a rolling mill (1) with civil steps comprising a cage whose amounts are seen in (2 and 3), two working rolls (4 and 4 ') with their chocks (5-5' - 6 -6 ') and their rotational drive gears (7-7').
  • the two cylinders (4-4 ') and their chocks (5-5' - 6-6 ') are joined in a known manner by rods and bolts.
  • (6A) the housing of the heads thereof.
  • all of the cylinders (4-4 '), their chocks (5-5' - 6-6 ') and their drive pinions (7-7') came out of the cage of the rolling mill (1) and fixed on a frame (8) which slides laterally with respect to the whole rolling mill (1) according to the prior art.
  • This device makes it possible, after having raised the front rack (9) to easily leave the rolling mill stand (1) all of the two cylinders (4-4 1 ) etcb their annexes. We see however that to have access to the lower cylinder (4) and its chocks (5,6), it is necessary to remove the upper cylinder (4 ') and its annexes (5', 6 ', 7'). The area in which the assembly of the two cylinders is then does not allow, in view of the general mechanical design of the rolling mill, which is very dense in this part adjacent to the rolling mill proper, to make complex and multiple handling operations such as for example the provisional deposition of the upper cylinder.
  • the solution then consists, taking into account the delicate problems posed by the adjustment of the two superimposed cylinder blocks to transport the assembly (4-4 ') with its annexes (5-5' --6-6 '- 7-7' ) in the tool shop.
  • the handling of such an assembly is made difficult by its very large mass which, for a large rolling mill can be of the order of 8 to 10 tonnes.
  • FIGs 2, 3 and 4 there is shown a rolling mill with cold crawl steps (10), comprising a cage (11), equipped according to the invention.
  • the assembly of the two working cylinders (12-12 ') of their chocks (13-13'-14-14') and of their rotational drive pinions (15-15 ') is mounted on a frame (16 ), which can itself be secured with a cradle (17), mounted on a horizontal axis (18) parallel to the axes working rolls and therefore perpendicular to the rolling axis.
  • This axis (18) allows the cradle (17), the frame (16) and the set of two cylinders (12-12 ') with their annexes, to pivot by rotation in a vertical plane parallel to the rolling axis , that is to say the axis of movement of the parts to be laminated, the axes of the cylinders (12-12 ') retaining the same orientation.
  • the two frets, lower (20) and upper (20 ') can be changed on site without having to dismantle the entire upper cylinder (12') and its annexes.
  • the adjustment and setting of the two frets (20-20 ') is done relative to the shafts (21-21') of each of the working cylinders (12-12 ') without having to move or adjust the relative position of the shafts (21-21 ') themselves, nor the rest of the cylinders (12-12').
  • the work of changing the frets (20-20 ') and their annexes is greatly facilitated.
  • the lateral drive device for the frame (16) is shown diagrammatically in FIG. 2 by a telescopic jack (22).
  • the frame (16) also comprises a jack (23) actuating a device of inclined shims which allows, according to a known technique, to release all of the cylinders (12-12 ') and their annexes when they are taken to take them remove from the stand (11) of the rolling mill (10).
  • the tilting device of the frame (16) by the cradle (17) is designed so as to take advantage of the little space available and not to hinder the passage of the mechanical devices of the rolling mill. This is and a bore (24) in the base (25) is provided to allow the passage of the shaft controlling the rotation of the product to be laminated.
  • the kinematics control assembly of the rolling mill (rolling kinematics, rotation kinematics, advance kinematics) as well as the entire tool change device is located on the same side of the rolling mill relative to the plane vertical passing through the rolling axis, thus completely freeing the other side.
  • the device for controlling the rotation of the cradle (17) around the axis (18) is not shown. It can be carried out in various ways well known to those skilled in the art. It is also understood that the frame (16) is designed so that it can successively move laterally, to ensure the extraction of the integral assembly of the cylinders, the cage (11) of the rolling mill (10) , then freely tilt with the cradle (17).
  • said cradle (17) has a side face (26).
  • the face (26) of the cradle (17) comes to bear on a stop (27).
  • the use of the device is easily understandable by examining FIGS. 2, 3 and 4.
  • the chocks (13-13 '- 14-14') are held together 2 to 2 by not shown connecting means.
  • the set of cylinders is released from the cage (11) by the action of the jack (23).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Crushing And Grinding (AREA)
  • Toys (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Turning (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP82420109A 1981-08-06 1982-07-30 Vorrichtung zum Werkzeugwechseln an Pilgerschrittwalzwerken Expired EP0072765B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420109T ATE17664T1 (de) 1981-08-06 1982-07-30 Vorrichtung zum werkzeugwechseln an pilgerschrittwalzwerken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8115571 1981-08-06
FR8115571A FR2510913A1 (fr) 1981-08-06 1981-08-06 Dispositif de changement d'outillage de laminoir a froid a pas de pelerin

Publications (2)

Publication Number Publication Date
EP0072765A1 true EP0072765A1 (de) 1983-02-23
EP0072765B1 EP0072765B1 (de) 1986-01-29

Family

ID=9261397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420109A Expired EP0072765B1 (de) 1981-08-06 1982-07-30 Vorrichtung zum Werkzeugwechseln an Pilgerschrittwalzwerken

Country Status (5)

Country Link
EP (1) EP0072765B1 (de)
JP (1) JPS5829508A (de)
AT (1) ATE17664T1 (de)
DE (1) DE3268811D1 (de)
FR (1) FR2510913A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993251A (en) * 1989-07-07 1991-02-19 Sandvik Special Metals Corporation Rollstand having easily replaceable roll dies

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159206A (ja) * 1983-02-28 1984-09-08 Mitsubishi Heavy Ind Ltd バツクアツプロ−ルフレ−ムの反転支持装置
JPH0673043B2 (ja) * 1986-03-19 1994-09-14 新王子製紙株式会社 静電記録体
JPH0617436A (ja) * 1991-01-30 1994-01-25 Sanko Kensetsu Kogyo Kk コンクリート構造物
DE102015122701A1 (de) 2015-12-23 2017-06-29 Sandvik Materials Technology Deutschland Gmbh Kaltpilgerwalzanlage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE541384C (de) * 1932-01-06 H C Gustav Asbeck Dr Ing Universalwalzwerk
DE604909C (de) * 1932-01-01 1934-11-02 Hirsch Verfahren zum Auswalzen von Rohren auf Pilgerschrittwalzwerken
DE848336C (de) * 1951-05-20 1952-09-04 Meer Ag Maschf Warmpilgerschrittwalzwerk
FR1559326A (de) * 1967-03-30 1969-03-07

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE541384C (de) * 1932-01-06 H C Gustav Asbeck Dr Ing Universalwalzwerk
DE604909C (de) * 1932-01-01 1934-11-02 Hirsch Verfahren zum Auswalzen von Rohren auf Pilgerschrittwalzwerken
DE848336C (de) * 1951-05-20 1952-09-04 Meer Ag Maschf Warmpilgerschrittwalzwerk
FR1559326A (de) * 1967-03-30 1969-03-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993251A (en) * 1989-07-07 1991-02-19 Sandvik Special Metals Corporation Rollstand having easily replaceable roll dies

Also Published As

Publication number Publication date
ATE17664T1 (de) 1986-02-15
JPH0138562B2 (de) 1989-08-15
FR2510913A1 (fr) 1983-02-11
DE3268811D1 (en) 1986-03-13
FR2510913B1 (de) 1984-12-28
JPS5829508A (ja) 1983-02-21
EP0072765B1 (de) 1986-01-29

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