EP3072603B1 - Unité de finition d'une machine de production de tuyaux carrés - Google Patents

Unité de finition d'une machine de production de tuyaux carrés Download PDF

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Publication number
EP3072603B1
EP3072603B1 EP16160514.2A EP16160514A EP3072603B1 EP 3072603 B1 EP3072603 B1 EP 3072603B1 EP 16160514 A EP16160514 A EP 16160514A EP 3072603 B1 EP3072603 B1 EP 3072603B1
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EP
European Patent Office
Prior art keywords
rollers
finishing
finishing section
square pipe
lateral
Prior art date
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Active
Application number
EP16160514.2A
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German (de)
English (en)
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EP3072603A1 (fr
Inventor
Riccardo Bosoni
Livio Travini
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.)
Olimpia 80 SRL
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Olimpia 80 SRL
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Publication of EP3072603A1 publication Critical patent/EP3072603A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0822—Guiding or aligning the edges of the bent sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section

Definitions

  • the object of the present invention is a finishing section of a machine for continuously producing square pipes, i.e. with square or rectangular section.
  • a machine for the continuous forming of square pipes comprises a plurality of forming stations which progressively bend a strip of sheet metal, followed by a finishing section which comprises at least one station which brings further together, in view of final welding, the edges of the sheet metal strip bent by the forming stations, and at least one station for the final welding of the square pipe.
  • Machines for forming square pipes by means of continuous bending of strips of sheet metal are well known in the art and comprise, in series one with the other, a plurality of stations wherein the strip of sheet metal is progressively deformed by pairs of joined rollers, i.e. having grooves with complementary profiles.
  • Such a machine defined as machine with variable linear geometry, is described for example in the European patent application EP 2279807 , in the name of the same Applicant OLIMPIA 80 S.R.L., and provides a variable number of so-called "pipe forming" steps wherein the originally flat sheet metal is deformed, creating the lower and upper edges of a square or rectangular profile by means of adjustable rollers, and therefore adaptable to several sizes of pipes to be produced, which press on the sheet metal both from the outside and from the inside of the profile of the pipe being formed until the latter is sufficiently open.
  • the pipe forming section is followed by a "pipe finishing" section wherein, it no longer being possible to act with rollers inside the profile of the pipe, rollers are provided which act from the outside to confer the final profile of the pipe before welding.
  • the finishing section comprises a plurality of stations, each of which comprises a lower roller placed under the square pipe being formed, a pair of rollers with vertical axis, adjustable horizontally, placed at the sides of the square pipe being formed and a pair of rollers with horizontal axes, distanced longitudinally and adjustable vertically, placed above the square pipe being formed.
  • the lateral rollers with vertical axes are conical rollers in order to adapt to the lateral profile of the square pipe being formed and are placed in line with the lower roller.
  • the upper rollers are instead biconical rollers, again in order to adapt to the upper profile of the square pipe being formed and, as mentioned, are staggered longitudinally in order not to interfere with the lateral conical rollers.
  • the lateral conical rollers have greater dimensions with respect to corresponding cylindrical rollers, which increases the transverse dimension of the machine.
  • the object of the invention is that of eliminating the disadvantages mentioned above. More particularly an object of the invention is that of providing a finishing section of a machine for the continuous production of square pipes, comprising at least one finishing station with an arrangement of the rollers such as to avoid any displacement or twisting or undulation of the square pipe being formed.
  • Another object of the invention is that of providing an arrangement and configuration of the rollers such as to make the corresponding finishing station compact.
  • each station of the finishing section according to the invention comprises:
  • rollers are all cylindrical and of limited width, but they could also be slightly conical without departing from the scope of the invention.
  • the upper rollers are arranged in line with the lower roller, while the lateral rollers are staggered longitudinally with respect thereto.
  • the inclination of the lateral rollers can be adjusted manually by means of a trapezoidal screw, as also the horizontal movement of opening/closure of the lateral rollers is obtained by means of a trapezoidal screw moved by a gear motor and controlled by means of an encoder placed on the gear motor.
  • the inclination of the two upper rollers can be adjusted manually by means of a trapezoidal screw and the vertical movement of these rollers is obtained by means of a jack moved by a motor.
  • the invention is aimed specifically at the finishing section which will be described here below with reference to Figures 2 to 6 , while the forming station, to be considered in itself known, will not be described further.
  • the finishing section denoted overall by reference numeral 10, is shown schematically in Figures 2 and 3 , and comprises four finishing stations 11a, 11b, 11c and 11d consecutive in the direction of forward movement of the sheet metal, i.e. the pipe being formed, from right to left in the example shown.
  • finishing stations 11 can be in a number different from that illustrated, and in theory even only one can be provided.
  • Each finishing station comprises a fixed lower roller 20 with strictly cylindrical or slightly convex profile in order to avoid a convexity of the lower face of the pipe being formed, two lateral rollers 21 with variable inclination and with the possibility of horizontal movement of opening/closure in order to adapt to the range of pipes to be produced, and two upper rollers 22, also with variable inclination and with the possibility of vertical movement of rise/descent in order to adapt to the dimensions of the pipes to be produced.
  • the two upper rollers 22 are placed in line, i.e. on the vertical line of the lower roller 20, while the lateral rollers 21 are placed in a longitudinally staggered position with respect to the lower roller 20 and to the upper rollers 22, in particular they are placed upstream of these rollers in the direction of forward movement of the square pipe being formed 1.
  • the lateral rollers 21 and the upper rollers 22 have a different inclination according to the position of the corresponding station 11 in the finishing section 10.
  • Figures 3A to 3H show how, moving from the first station 11a to the last station 11d, the angle of inclination ⁇ shown in the drawings, which corresponds to the inclination of the axis of the lateral rollers with respect to the vertical line, decreases from 20° to 6° in the example given, while the angle of inclination of the axis of the upper rollers 22 with respect to the horizontal line decreases from 23.5° to 4.5° in the example given.
  • Both the rollers 21 and the rollers 22 are cylindrical rollers, which makes the machine compact, above all in the transverse direction.
  • Figures 4A , 4B and 4C are overall views, respectively perspective, from above and side of a finishing section with four stations, according to the invention.
  • Figures 5 and 6 show the assemblies carrying respectively the lateral rollers 21 and the upper rollers 22 with the lower roller 20, illustrating the mechanisms which allow the movements of these rollers, which have been set to be arranged in the first finishing station 11a.
  • Figures 5A and 5B are respectively a perspective view and a front view of an assembly 11a' carrying the lateral rollers 21.
  • the rollers 21 are mounted rotating on respective supports 30 with circular profile, so as to be able to slide in respective circular guides 31, so as to allow a rotation of the rollers around centres of rotation C1, C2 corresponding to the lower edges of the profile of the pipe 1 being formed, against which the lower edges of the rollers 21 are arranged.
  • Figure 5 also shows locking screws 33 inserted in corresponding slots 34 to firmly block the supports 30 of the rollers 21, in the calibration position, with respect to the respective guides 31.
  • a graduated scale 35 is also provided where it is possible to read with precision the angle of inclination of the rollers 21.
  • the circular guides 31 carrying the lateral rollers 21 are mounted on respective slides 36 sliding on respective guide blocks 37 attached to the plinth 40 of the finishing section.
  • the movement of the slides 36, which determines the opening/closure of the lateral rollers 21 in order to adapt them to the dimension of the square pipe to be formed is obtained, in the example shown, by means of a pair of trapezoidal screws 38 actuated by gear motor 39.
  • rollers like the lateral rollers 21, are carried by the respective supports 50 with circular profile, sliding in respective circular guides 51, so as to rotate around a centre of rotation corresponding to the intersection point of the extensions of the upper edges of the pipe 1 being formed, in order to be able to perform the calibration of these rollers on the basis of the position of the corresponding station in the finishing section.
  • the circular guides 51 are mounted on vertical slides 56 sliding on uprights 57 attached to the plinth 40.
  • the slides 56 are joined above by a crosspiece 58 actuated to move vertically up and down in order to adapt the rollers 22 to the dimension of the square pipes to be produced, by means of a jack 59 moved by a motor 60.
  • the profile of the lower roller 20 can be perfectly cylindrical.
  • the lower roller 20 is mounted on a support 70 with the possibility of a slight adjustment vertically, should the need arise.
  • All the rollers 20, 21, 22 of each finishing station are normally mounted idle around the relevant axes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (10)

  1. Unité de finition (10) d'une machine de production continue de tuyaux carrés, adaptée pour être installée en aval d'une unité de formation appropriée pour le cintrage progressif d'une bande de tôle (1), et en amont d'une unité de soudage du tuyau carré formé, ladite unité de finition (10) comprenant au moins une station de finition (11a, 11b, 11c, 11d) appropriée pour rapprocher davantage les bords supérieurs de la bande de tôle cintrée sortant de ladite unité de formation, ladite au moins une station de finition comprenant un rouleau inférieur (20) présentant un axe substantiellement horizontal, agissant comme un support pour le tuyau carré pendant sa formation, deux rouleaux latéraux (21) placés sur les côtés du tuyau carré pendant sa formation, montés avec la possibilité de se déplacer horizontalement, c'est-à-dire parallèlement au plan de la bande de tôle (1), et deux rouleaux supérieure (22) placés au-dessus du tuyau carré pendant sa formation, montés avec la possibilité de se déplacer verticalement, c'est-à-dire orthogonalement au plan de la bande de tôle (1), lesdits déplacements horizontaux et verticaux étant prévus pour régler la position des rouleaux latéraux (21) et des rouleaux supérieure (22) en fonction de la taille du tuyau à produire, caractérisée en ce que lesdits rouleaux latéraux (21) et lesdits rouleaux supérieure (22) présentent une inclinaison réglable.
  2. Unité de finition selon la revendication 1, caractérisée en ce que lesdits rouleaux supérieure (22) avec une inclinaison réglable de ladite au moins une station de finition (11) sont alignés avec ledit rouleau inférieur (20), c'est-à-dire sur la ligne verticale de celui-ci, tandis que lesdits rouleaux latéraux (21) sont décalés longitudinalement, dans la direction du déplacement avant du tuyau carré pendant sa formation, par rapport auxdits rouleaux (20, 22).
  3. Unité de finition selon la revendication 2, caractérisée en ce que lesdits rouleaux latéraux (21) sont installés en amont desdits rouleaux supérieure (22).
  4. Unité de finition selon l'une quelconque des revendications précédentes, caractérisée en ce que lesdits rouleaux latéraux (21) sont montés sur des supports relatifs (30) coulissant sur des guides circulaires (31) correspondants, de manière à pouvoir tourner autour de centres de rotation (C1, C2) correspondant aux bords inférieurs du profil du tuyau carré (1) pendant sa formation, au niveau desquels sont placés les bords inférieurs des rouleaux (21).
  5. Unité de finition selon la revendication 4, dans laquelle lesdits rouleaux latéraux (21) avec les supports (30) respectifs et les guides circulaires (31) sont montés sur des glissières (36) respectives glissant horizontalement et symétriquement sur des blocs de guidage (37) fixés à un socle (40) de l'unité de finition.
  6. Unité de finition selon l'une quelconque des revendications précédentes, caractérisée en ce que lesdits rouleaux supérieure (22) sont montés sur des supports (50) respectifs coulissant dans des guides circulaires (51) respectifs, de manière à pouvoir tourner autour d'un centre de rotation (C) correspondant au point d'intersection des extensions des bords supérieurs du profil du tuyau carré (1) pendant sa formation.
  7. Unité de finition selon la revendication 6, caractérisée en ce que lesdits rouleaux supérieure (22) avec les supports relatifs (50) et les guides circulaires (51) sont montés sur des glissières (56) respectives glissant verticalement sur des montants (57) fixés au socle de l'unité de finition.
  8. Unité de finition selon la revendication 7, dans laquelle lesdites glissières verticales (56) sont reliées sur le dessus par une pièce transversale (58) actionnée par un vérin (59) à l'aide d'un moteur (60).
  9. Unité de finition selon l'une au moins des revendications 4 à 7, dans laquelle lesdits déplacements permettant de régler l'inclinaison desdits rouleaux latéraux (21) et desdits rouleaux supérieure (22) sont effectués à l'aide de vis trapézoïdales, et le déplacement horizontal des rouleaux latéraux (21) est obtenu à l'aide de vis trapézoïdales.
  10. Machine pour la formation continue de tuyaux carrés, comprenant, en série les unes avec les autres, une unité de formation appropriée pour cintrer progressivement une bande de tôle (1), une unité de finition (10) appropriée pour rapprocher davantage les bords supérieurs de la bande de tôle cintrée, et une unité de soudage du tuyau carré formé, caractérisée en ce que ladite unité de finition (10) comprend au moins une station de finition (11a, 11b, 11c, 11d) selon l'une quelconque des revendications précédentes.
EP16160514.2A 2015-03-23 2016-03-15 Unité de finition d'une machine de production de tuyaux carrés Active EP3072603B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB20150527 2015-03-23

Publications (2)

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EP3072603A1 EP3072603A1 (fr) 2016-09-28
EP3072603B1 true EP3072603B1 (fr) 2019-11-27

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EP16160514.2A Active EP3072603B1 (fr) 2015-03-23 2016-03-15 Unité de finition d'une machine de production de tuyaux carrés

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EP (1) EP3072603B1 (fr)
JP (1) JP2016209930A (fr)
CN (1) CN105983602A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108372232A (zh) * 2018-04-20 2018-08-07 江苏高动新能源科技有限公司 管内成型装置和电池壳管精确内成型装置
CN110701392A (zh) * 2018-07-10 2020-01-17 苏州三星电子有限公司 一种p形管、p形管成型工艺及p形管成型设备
CN110355611B (zh) * 2019-08-19 2024-09-20 河北腾天焊管设备制造有限公司 方管生产线

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56128618A (en) * 1980-03-13 1981-10-08 Nippon Steel Metal Prod Co Ltd Production of square steel pipe
JPS58103917A (ja) * 1981-12-16 1983-06-21 Nakajima:Kk 大径角形鋼管の製造方法
AT399674B (de) * 1992-08-03 1995-06-26 Voest Alpine Ind Anlagen Vorrichtung zum kontinuierlichen umformen eines metallischen rohres
IT1394852B1 (it) 2009-07-21 2012-07-20 Olimpia 80 Srl Macchina a geometria lineare variabile per formare in continua tubi quadri

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JP2016209930A (ja) 2016-12-15
CN105983602A (zh) 2016-10-05
EP3072603A1 (fr) 2016-09-28

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