EP0041464B1 - Chariot porte-butée de laminoir - Google Patents

Chariot porte-butée de laminoir Download PDF

Info

Publication number
EP0041464B1
EP0041464B1 EP81420075A EP81420075A EP0041464B1 EP 0041464 B1 EP0041464 B1 EP 0041464B1 EP 81420075 A EP81420075 A EP 81420075A EP 81420075 A EP81420075 A EP 81420075A EP 0041464 B1 EP0041464 B1 EP 0041464B1
Authority
EP
European Patent Office
Prior art keywords
bar
carriage
stop
rear end
rolling
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
Application number
EP81420075A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0041464A1 (fr
Inventor
Claude Blanquet
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 AT81420075T priority Critical patent/ATE7113T1/de
Publication of EP0041464A1 publication Critical patent/EP0041464A1/fr
Application granted granted Critical
Publication of EP0041464B1 publication Critical patent/EP0041464B1/fr
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
    • 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
    • B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels

Definitions

  • the bar on which the drilled blank is fitted is released axially from the rolling mill, with its carriage, then separated from the stop, to be recycled to a new drilling operation after having been stripped of the blank, which continues its manufacturing cycle.
  • the present invention aims to reduce this dead time to achieve a gain in production, while meeting the obligations to align, move the bar and allow its rotation during the drilling operation.
  • this is achieved by mounting the clamp so that it is no longer rotatable, but made integral with the carriage, and by replacing the positive connection between the rotary stop and the bar by a simple contact between the faces in look of the stop and the bar allowing a lateral ejection of the bar relative to the stop without prior axial clearance.
  • the bar and the stop are in contact by faces, at least one of which is a surface of revolution, and in particular a plane.
  • faces at least one of which is a surface of revolution, and in particular a plane.
  • the invention also avoids the use of means such as fork or central ejection bar necessary in the prior art to eject the bar, hence a simplification of equipment.
  • the bar comprises a notch to receive the jaws of the clamp; these jaws are applied in the notch with a radial clearance to allow the bar to rotate relative to the jaws; in addition, they are applied in the notch with an axial clearance, so that they are used to maintain the bearing end of the bar in the immediate vicinity of the stop grain of the carriage only during the phases of translation of that here, that is to say when the bar is introduced axially into the rolling mill before the start of the drilling operation and then when the bar is extracted axially out of the rolling mill once the drilling is finished.
  • the product entrained by the cylinders of the piercing rolling mill makes contact with the drilling tip secured to the bar, and can push the assembly with force against the stop grain of the carriage prior rotation; drilling begins immediately, and the development of axial reactions on the resulting bar has the effect of applying this forcefully on the stop grain, resulting in an almost immediate rotation of the bar under the effect conjugate of the product which turns and the grain of stopper put in rotation beforehand.
  • the stop grain is sufficiently massive so that the heat released during the very brief period of making contact is for the most part absorbed by the mass of the grain and does not cause too great a temperature rise at the level of the contact. .
  • the device shown in the figures comprises a carriage 1 which carries a clamp 2 and a stop 3.
  • the carriage is movable by translation, in a direction parallel to the axis XX 'of the piercing mill (the latter not shown and being hand-held right), displacement obtained for example by means of a 4-rack pinion system 5, the pinion being rotationally controlled by a motor (not shown).
  • This drive system known per se is not limiting, and the invention is not concerned with the details of the carriage drive means.
  • the clamp 2 as shown in more detail in FIG. 2, comprises two arms 6 and 7 articulated around a pivot 8, itself fixed to a transverse partition 9 arranged in a housing formed in the front part 10 of the carriage 1.
  • Cylinders 11 and 12 articulated around pivots 13 and 14 integral with the partition 9 control the movement of the arms 6 and 7 of the clamp, by means of rods 15 and 16 connected to the ends of the arms by pivots 17 and 18. It is thus possible by remotely controlling the jacks by known means, to cause the clamp to close in the position which is shown in FIG. 2 or, on the contrary, its opening by rotation of the arms 6 and 7 in opposite directions around the pivot 8, as shown by the arrows.
  • the jaws 19 and 20 of the two arms of the clamp engage in a notch 21 of the piercing bar 22 with a radial clearance e of the order of 2 mm and an axial clearance k of the order of 5 to 10 mm.
  • the invention is not limited to a particular type of clamp.
  • the stop 3 is rotated on the carriage, about the axis X'X, by means of a motor 23 carried by the carriage or independent.
  • the axial clearance k of the clamp is designed to allow the contact face 24 to separate the stop face from the stop grain and the rear end face 25 of the bar.
  • the bar carries a piercing bulb 26.
  • At least one of these faces is preferably a surface of revolution, and in particular a plane, to facilitate lateral clearance as much as possible without axial displacement of the bar, during the change of helm.
  • the two faces 24 and 25 are planes.
  • the stop is rotated at a speed of 1000 to 1500 rpm, preferably chosen slightly lower than the theoretical speed of the bar in operation, for example 90% thereof, so that the friction between bar and stop , when they come into contact, only cause acceptable overheating.
  • the bar comes into contact with the stop not because of a positive bond, as in the prior art, but under the effect of rolling reactions during drilling.
  • the clamp prevents the leak under shock at the time of contact; it subsequently provides clearance from the rolling mill, once drilling has been completed.
  • blocking means not described, but well known to those skilled in the art, are used to wedge the carriage 1 in the rolling position during the period when the bar 22 is in abutment on the stop 3.
  • These means have a retractable shim controlled by a jack which comes to bear on the rear of the carriage to prevent it from moving back.
  • the device also includes, as known devices, not shown, units for guiding the bar, between the carriage and the piercing rolling mill, as well as the means for lateral evacuation of the bar and the blank which surrounds it, once the drilling done, and the means for introducing the bar intended for the next drilling.
  • the device previously described made it possible to pass the time, between two drilling operations, from 12 to 15 s to 6 to 7 s , or a time saving of 6 to 8s, representing an overall productivity increase of around 25%.
  • the assembly consisting of the piercing bulb and the bar can weigh 350 to 1,800 kg, the total mass of the carriage being 6,000 kg, and that of the stopper grain proper from 9.5 to 11.5 kg .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Manipulator (AREA)
  • Springs (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Moulding By Coating Moulds (AREA)
  • Support Of The Bearing (AREA)
  • Rolling Contact Bearings (AREA)
  • Harvester Elements (AREA)
  • Handcart (AREA)
  • Drilling And Boring (AREA)
  • Machine Tool Units (AREA)
EP81420075A 1980-05-23 1981-05-19 Chariot porte-butée de laminoir Expired EP0041464B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420075T ATE7113T1 (de) 1980-05-23 1981-05-19 Anschlagschlitten fuer ein walzwerk.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011526A FR2482877A1 (fr) 1980-05-23 1980-05-23 Chariot porte-butee de laminoir perceur et procede pour le mettre en oeuvre
FR8011526 1980-05-23

Publications (2)

Publication Number Publication Date
EP0041464A1 EP0041464A1 (fr) 1981-12-09
EP0041464B1 true EP0041464B1 (fr) 1984-04-18

Family

ID=9242272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420075A Expired EP0041464B1 (fr) 1980-05-23 1981-05-19 Chariot porte-butée de laminoir

Country Status (9)

Country Link
US (1) US4395897A (es)
EP (1) EP0041464B1 (es)
JP (1) JPS5717308A (es)
AT (1) ATE7113T1 (es)
CA (1) CA1164252A (es)
DE (1) DE3163176D1 (es)
ES (1) ES502378A0 (es)
FR (1) FR2482877A1 (es)
MX (1) MX156245A (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1152796B (it) * 1982-06-17 1987-01-14 Innocenti Santeustacchio Spa Testa porta-mandrino per laminatoio continuo a mandrino trattenuto
DE3602523C1 (de) * 1986-01-24 1986-12-18 Mannesmann AG, 4000 Düsseldorf Widerlager fuer ein Rohrwalzwerk
FR2604929B1 (fr) * 1986-10-14 1988-12-02 Vallourec Dispositif d'accrochage rapide assurant la retenue d'un mandrin rotatif
ITMI20110573A1 (it) * 2011-04-07 2012-10-08 Danieli Off Mecc Dispositivo di convogliamento di mandrino per impianto di laminazione di tubi
CN112427459A (zh) * 2020-10-20 2021-03-02 浙江铜加工研究院有限公司 芯杆固定装置及高速轧机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2024514A (en) * 1933-03-25 1935-12-17 Diescher Tube Mills Inc Method and apparatus for making tubes
DE686767C (de) * 1937-10-23 1940-01-16 Roehrenwerke Akt Ges Deutsche Fuer Schraegwalzwerke zur Herstellung von Rohren bestimmter Dorn
US2480381A (en) * 1945-12-20 1949-08-30 Nat Tube Co Thrust bearing for seamless tube mills and the like
US3722246A (en) * 1970-04-10 1973-03-27 Innocenti Soc Generale Hot perforating mill
US4037449A (en) * 1976-07-30 1977-07-26 Aetna-Standard Engineering Company Continuous flow plug mill system
JPS5568105A (en) * 1978-11-14 1980-05-22 Nippon Steel Corp Mandrel recycle setter for pipe forming machine

Also Published As

Publication number Publication date
EP0041464A1 (fr) 1981-12-09
JPS6139122B2 (es) 1986-09-02
MX156245A (es) 1988-07-28
ES8203656A1 (es) 1982-04-01
FR2482877A1 (fr) 1981-11-27
FR2482877B1 (es) 1983-06-24
DE3163176D1 (en) 1984-05-24
ATE7113T1 (de) 1984-05-15
CA1164252A (en) 1984-03-27
ES502378A0 (es) 1982-04-01
US4395897A (en) 1983-08-02
JPS5717308A (en) 1982-01-29

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