CA1238089A - Equipment for the automatic welding of pipes - Google Patents
Equipment for the automatic welding of pipesInfo
- Publication number
- CA1238089A CA1238089A CA000482844A CA482844A CA1238089A CA 1238089 A CA1238089 A CA 1238089A CA 000482844 A CA000482844 A CA 000482844A CA 482844 A CA482844 A CA 482844A CA 1238089 A CA1238089 A CA 1238089A
- Authority
- CA
- Canada
- Prior art keywords
- welding
- base plate
- rail
- supporting
- pipes
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
- B23K9/0286—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
Abstract
"IMPROVED EQUIPMENT FOR THE AUTOMATIC WELDING OF PIPES"
Abstract of the Disclosure Orbitary-moving equipment for the automatic welding of pipes, comprising a fixed rail on to which a base plate supporting a welding system is rotatably fastened, wherein a second complete and autonomous welding system is assem-bled together with the first one at an adjustable relative distance from each other on to a second supporting plate, by fixing them by means of bolts inside slots extending in a circumferential direction relatively to the rail, said second plate being hinged on to the end of said supporting base plate, it being so possible to swing it to a spaced-apart position. Also the bobbin of the welding wire for the second welding lance is swingingly mounted by means of an articulated arm kept in its position by means of a locking key.
Abstract of the Disclosure Orbitary-moving equipment for the automatic welding of pipes, comprising a fixed rail on to which a base plate supporting a welding system is rotatably fastened, wherein a second complete and autonomous welding system is assem-bled together with the first one at an adjustable relative distance from each other on to a second supporting plate, by fixing them by means of bolts inside slots extending in a circumferential direction relatively to the rail, said second plate being hinged on to the end of said supporting base plate, it being so possible to swing it to a spaced-apart position. Also the bobbin of the welding wire for the second welding lance is swingingly mounted by means of an articulated arm kept in its position by means of a locking key.
Description
The present invention relates to an orbitary-moving equi.pment for the automatic welding of pipes, ~hich shall be referred to hereinunder simply as to "the orbital e-quipment", which, by producing at the same time b~ means of two welding lances two superimposecl welding string beads during each passage, accelerates, improves, innovates ~;~ and makes cheaper the automatic welding operation, both in the upwards and in the downwards directions, of pipes even of large diametcr.
The need of accelerating the working cycle ln the welding operations in the laying of pipelines intended for the delivery of liquids or of' gases, to the purpose of re-ducing the costs thereof to more and more competitive val-ues and to reduce the required time as far as possible, has in~rolved the development ot' more and more co.plex e~
quipment for pipe automatic welding.
~, From the present state of the art highly efficient orbital equipment are known for the automatic welding of pipes among which is in particular the one disclosed in our :: ~: : :: :
prior Canadian Patent N1.046.802 granted on January 23,1979 ~ of whose object : the present Patent Application is a c~nsiderable improve-ment.
As it is well known, the orbital equipment being the ~: 25 object of the above mentioned prior Patent~ . i.s es3entially constituted bv a rail positioned and fixed a-round the pipe in 3 prGdetermined position around the ed~e to be welded, as well as by a supportin~ plate base f`asten ed by means of qulclc-fasteni.ng means on to the edges of the 0 said rail, throu~h 'our raced rlheels intended .t'~r slidin~, and moved along said rail by a driving knurled pinion co-operating with an edge of the same rail, on said base plate there being mounted, among others, the welding lance, the welding wire feeder and the mechanisms necessary for the adjustment of the position of said lance, as well as for the swinging thereof in the trasversal direction relative~
ly to said edge to be welded.
Such an orbital equipment, sim ~arly to all other sim ilar equipments known, allow only one single welding string bead to be Gbtained during each passage.
In other terms, two superi~posed wel.ding string beads can only be obtai.ned in subsequent and spaced times, by means of two d.ifferent passages.
Hence, due to the fact that t.he wel~ing of a pi.pe is always completed by means of the superimposltion of a cer-tai.n number of string beads, as many passages are neces-sary, as many are the beads to be accomplished.
Purpose of the present invent-on is precisely to ob-viate the limitation said, and to provide therefore an or-2C bital equipment allowing the welding t~ be obtained with asmaller number of passages.
~.
By achieving su^h a purpose, also a better qual'ty of the welds is obtained.
It has been indeed surprisingly experimentally found that, by effeccing two superimposed weLding string beads wi~hin 2 short tcime range from e~ch ~'her, i.e., practicai ly effecting a welding bead when the melting bath of the underlying bead h s not yet become completely cold, as it happens with the known art, a ~eld with optimum charac-teristics is obtained, in that an easier interpenetratiorof the t~o superinlposed bea~is i9 obtai.ned, which impro~tes the metallurgical characteristics and hence also the tough ness of the welded joints.
The problem has been hence so]ved by adopting on a same supporting base plate two welcling lance assemblies equipped with positioning and swinging actuation devices as well as with two welding wire feeders, so that by means of a same single travel of the equipment along the edge to be welded, two superimposed welding string beads are obtained, the second bead being effected with a time delay relatively to the first one which is proportior,al to the dista~nce on the base plate between the two lances said.
On the other hand, it has been observed always in an experimental way that the qu~lity of the weld is also a 'un-ction of the said time delay, which must therefore be pre-cisely determined in each case, so that, in order it to beossible to control this phenomenon too, it is necessarJ to ~ envisage the possibility of varying the time interval e--~ lapsing between the formation of two subsequent welding beads, so that it be possible to start the second cycle at that precise moment of the first cycle whereat the con-ditions of temperature and of solidifying conditior.s of the weldi~ material and of the same pipe are the most suitable to start said second cycle.
~- ~ To that purpose, the welding lances are not mounted
The need of accelerating the working cycle ln the welding operations in the laying of pipelines intended for the delivery of liquids or of' gases, to the purpose of re-ducing the costs thereof to more and more competitive val-ues and to reduce the required time as far as possible, has in~rolved the development ot' more and more co.plex e~
quipment for pipe automatic welding.
~, From the present state of the art highly efficient orbital equipment are known for the automatic welding of pipes among which is in particular the one disclosed in our :: ~: : :: :
prior Canadian Patent N1.046.802 granted on January 23,1979 ~ of whose object : the present Patent Application is a c~nsiderable improve-ment.
As it is well known, the orbital equipment being the ~: 25 object of the above mentioned prior Patent~ . i.s es3entially constituted bv a rail positioned and fixed a-round the pipe in 3 prGdetermined position around the ed~e to be welded, as well as by a supportin~ plate base f`asten ed by means of qulclc-fasteni.ng means on to the edges of the 0 said rail, throu~h 'our raced rlheels intended .t'~r slidin~, and moved along said rail by a driving knurled pinion co-operating with an edge of the same rail, on said base plate there being mounted, among others, the welding lance, the welding wire feeder and the mechanisms necessary for the adjustment of the position of said lance, as well as for the swinging thereof in the trasversal direction relative~
ly to said edge to be welded.
Such an orbital equipment, sim ~arly to all other sim ilar equipments known, allow only one single welding string bead to be Gbtained during each passage.
In other terms, two superi~posed wel.ding string beads can only be obtai.ned in subsequent and spaced times, by means of two d.ifferent passages.
Hence, due to the fact that t.he wel~ing of a pi.pe is always completed by means of the superimposltion of a cer-tai.n number of string beads, as many passages are neces-sary, as many are the beads to be accomplished.
Purpose of the present invent-on is precisely to ob-viate the limitation said, and to provide therefore an or-2C bital equipment allowing the welding t~ be obtained with asmaller number of passages.
~.
By achieving su^h a purpose, also a better qual'ty of the welds is obtained.
It has been indeed surprisingly experimentally found that, by effeccing two superimposed weLding string beads wi~hin 2 short tcime range from e~ch ~'her, i.e., practicai ly effecting a welding bead when the melting bath of the underlying bead h s not yet become completely cold, as it happens with the known art, a ~eld with optimum charac-teristics is obtained, in that an easier interpenetratiorof the t~o superinlposed bea~is i9 obtai.ned, which impro~tes the metallurgical characteristics and hence also the tough ness of the welded joints.
The problem has been hence so]ved by adopting on a same supporting base plate two welcling lance assemblies equipped with positioning and swinging actuation devices as well as with two welding wire feeders, so that by means of a same single travel of the equipment along the edge to be welded, two superimposed welding string beads are obtained, the second bead being effected with a time delay relatively to the first one which is proportior,al to the dista~nce on the base plate between the two lances said.
On the other hand, it has been observed always in an experimental way that the qu~lity of the weld is also a 'un-ction of the said time delay, which must therefore be pre-cisely determined in each case, so that, in order it to beossible to control this phenomenon too, it is necessarJ to ~ envisage the possibility of varying the time interval e--~ lapsing between the formation of two subsequent welding beads, so that it be possible to start the second cycle at that precise moment of the first cycle whereat the con-ditions of temperature and of solidifying conditior.s of the weldi~ material and of the same pipe are the most suitable to start said second cycle.
~- ~ To that purpose, the welding lances are not mounted
2~ on fixed positions on the supporting base plate, but in : :
such a way that the distance, .n the circumferent:ial di-rection of the rail, of a lance relatively to the other one can be ~aried as desired, and consequentl~ the sai.d time delay can be varied as desired, and this is achiev-0 ed by si!nply fastening the t~o welding syste~s by m~ansof bolts housed within slots, which e~tend in the circu~!-~ g ferential directi.on of the same rail.
As~ moreover, the adoption of two complete and auto-nomous welding systems on a same base plate, whose siæe of course must not be increased in order not to increase the o~-erall dimensions, which would impair an efficient fastening on to the rail and would make more complex the welding of a circular joint~ involves such an accumula-tion of elements on the said plate, as to render dif-ficult the operations of inspection and o~' cleaning of the we].ding lances and of the lower parts of the mobile equi~
ment without it being necessary to di.sengage the whole structure from the fixed rail, according to another feature of the invention the two said welding systems , instead of being mounted on the said supporting base plate, are mount-~5 ed on a second supporting plate, whlch is hinged on to anend of t~.e said base plate, and is held in correspondence of its other end by a locking hook mounted on sai.d support-ing base plate. In this way, by disengaging the said lock ing hook, it is possible to swing apart the said second plate and thus to render easily accessible the lances and the lower parts of the movable equipmerlt mentioned.
Summarizing, the orbitary-moving equipment for the automatic welding of pipes, comprising a fixed portion or rail positioned and fixed around the pipe in a predetermin-2~ ed position relatively to the edge to be welded, as wellas a movable portion constituted by a supporting base plate fastened with quick-fastening means on to the edges of the said rail throuæh four raced wheels for sliding, and driven ~ along said rail by a drivir1g knurled pinion cooperating :~ 30 with an edge of the same rail, on which base plate a weld in~r systeln is mo~lnted, constit~lted by a block supportirlg :;
` ~3~
the welding lance comprehensive of the ~evices necessar~
for the adjustment of its positioning and for its swing-ing motion, as well as the feeding device of the welding wire, comprising the welding wire bobbin and the mechanism for delivering the same wire, is characterized according to the present invention in that it is provided with an analogous second welding system mounted in a parallel ~ , position ~o the first welding system on said base plate?: so that the two welding lances are positioned parallel to each other along the edge to be welded, the two said welding systems being fixed at a mutual adjustable dis-tance by fastening the said supporting blocks with bolts housed within slots e~tending in the circutnferential di-rection of the same rail, provided on a second supp~rtlng plate which is in its turn hinged in correspondence of an end thereof on to an end of said supporting base pla'~e and held in correspondence of its other end by a locking hook for the locking of said supporting base plate.
Moreover, as, due to the limited space available, : : 20 the addition in a parallel arrangement of a ~econd weld : ing wire bobbin for feeding the second lance would make i.t impossible the reloading of the wire on the bobbin of the first lance7 according to another feature of the : present invention, the welding wire bobbin for said second lance is rotat,ably mounted on an arm articulated and kept ~ in its position by a locking key.
,~ In such a way, by unlocking the key, said second bob bin can be swung apart, thus allowing the first bobbin ~; to be inserted inside its housirlg.
~0 The invention is now better clarified with reference to the drawings attached, which illustrate a preferred 6.
.
form of practical embodiment, given to only exemplifying and not limitative purpose, in that it shall-be always possible to introduce technical of structural modifications always within the spirit of the present invention.
In said drawings:
Fig. 1 shows in a partial perspective view an orbit-al equipment according to the invention, mounted on a pipe to be welded;
Fig. 2 shows in partial perspective view the orbital equipment of Fig. 1, with the weldirg systems in their swung-apart position;
Fig. 3 shows in a partial perspective vie~ and on enlarged scale the detail of the mounting system of the second welding wire bobbin, it too according to the in-vention.
Referring to the drawings, with 1 the edge to be weld-ed is shown of a pipe 2, on to which at a predetermined dis stance relatlvely to said edge 1, a circular rail 3 is mounted and fixed, leaning on to said pipe by means of pin-shaped spacers 4.
On the rail 3 a supporting base plate 6 is then fas~en ed, with moving possibility, through ~four slide raced wheels 5, on an end of whose supporting base plate 6 a second supporting plate 8 is hinged, by means of the rotation pin 7, such second supporting plate 8 being kept into contact with the base plate 6 by means of a quick-release locking hook 9, which, with being mo~nted at the other end of said base plate 6, causes its hook 9' to interact ;~ with the upper surface cf the other end of the said sec-ond supporting plate 8 (see speci~fically Fig. 1).
~aid second supporting plate 8 is moreover provided ~;~3~
with pairs of slots 10, extending in the circumferential direction of the rail 3, within which two supporting blocks, respectively 11 and 11 ' are bolted in paral-lel arrarlgement to each other. Said blocks 11 and 11', whose mutual distance is clearly adjustable as de3ired by taking advantages of the length of said slots 10, support two wel~ing systems complete, autonomous and positioned parallel to each other, of which the second one shall be hereinunder marked wit'n the same numbering as of the first one, but provided with a prime.
More specifically, each block 11, 11' supports, with the possibility of the adjustment thereof in the axial d rcction of the pipe 2 by means of the guide of the knob 12, 12', a frame 13, 13' which is in its turn vertically adjustable in the radial direction by means of the knob 14, 14'. Each frame 13, 13' ~upports then, with the pos-sibility of swinging movements, whose stroke can be adjust-ed by means of the knob 15, 15', a structure 16, 16' onto which a welding lance 18, 18' is fastened, by means of a projecting arm 17, 17'.
~he two lances 18, 18' are positioned in a parallel arrangement relatively to each other along the edge to be welded 1 (see specifically Fig. 1~ and are fed with the welding wire 19, 19' which is extracted from its relative bobbin 20, 20' by a driving mechanism 21, 21'.
Finally, the bobbin 20l of the welding wire 19' for ; the second lance 18', as it can be clearly seen in Fig. 3, is mounted on an arm 22 hinged in 23 on to a bracket 24 which is solid with said bloc'~ 11'.
such a way that the distance, .n the circumferent:ial di-rection of the rail, of a lance relatively to the other one can be ~aried as desired, and consequentl~ the sai.d time delay can be varied as desired, and this is achiev-0 ed by si!nply fastening the t~o welding syste~s by m~ansof bolts housed within slots, which e~tend in the circu~!-~ g ferential directi.on of the same rail.
As~ moreover, the adoption of two complete and auto-nomous welding systems on a same base plate, whose siæe of course must not be increased in order not to increase the o~-erall dimensions, which would impair an efficient fastening on to the rail and would make more complex the welding of a circular joint~ involves such an accumula-tion of elements on the said plate, as to render dif-ficult the operations of inspection and o~' cleaning of the we].ding lances and of the lower parts of the mobile equi~
ment without it being necessary to di.sengage the whole structure from the fixed rail, according to another feature of the invention the two said welding systems , instead of being mounted on the said supporting base plate, are mount-~5 ed on a second supporting plate, whlch is hinged on to anend of t~.e said base plate, and is held in correspondence of its other end by a locking hook mounted on sai.d support-ing base plate. In this way, by disengaging the said lock ing hook, it is possible to swing apart the said second plate and thus to render easily accessible the lances and the lower parts of the movable equipmerlt mentioned.
Summarizing, the orbitary-moving equipment for the automatic welding of pipes, comprising a fixed portion or rail positioned and fixed around the pipe in a predetermin-2~ ed position relatively to the edge to be welded, as wellas a movable portion constituted by a supporting base plate fastened with quick-fastening means on to the edges of the said rail throuæh four raced wheels for sliding, and driven ~ along said rail by a drivir1g knurled pinion cooperating :~ 30 with an edge of the same rail, on which base plate a weld in~r systeln is mo~lnted, constit~lted by a block supportirlg :;
` ~3~
the welding lance comprehensive of the ~evices necessar~
for the adjustment of its positioning and for its swing-ing motion, as well as the feeding device of the welding wire, comprising the welding wire bobbin and the mechanism for delivering the same wire, is characterized according to the present invention in that it is provided with an analogous second welding system mounted in a parallel ~ , position ~o the first welding system on said base plate?: so that the two welding lances are positioned parallel to each other along the edge to be welded, the two said welding systems being fixed at a mutual adjustable dis-tance by fastening the said supporting blocks with bolts housed within slots e~tending in the circutnferential di-rection of the same rail, provided on a second supp~rtlng plate which is in its turn hinged in correspondence of an end thereof on to an end of said supporting base pla'~e and held in correspondence of its other end by a locking hook for the locking of said supporting base plate.
Moreover, as, due to the limited space available, : : 20 the addition in a parallel arrangement of a ~econd weld : ing wire bobbin for feeding the second lance would make i.t impossible the reloading of the wire on the bobbin of the first lance7 according to another feature of the : present invention, the welding wire bobbin for said second lance is rotat,ably mounted on an arm articulated and kept ~ in its position by a locking key.
,~ In such a way, by unlocking the key, said second bob bin can be swung apart, thus allowing the first bobbin ~; to be inserted inside its housirlg.
~0 The invention is now better clarified with reference to the drawings attached, which illustrate a preferred 6.
.
form of practical embodiment, given to only exemplifying and not limitative purpose, in that it shall-be always possible to introduce technical of structural modifications always within the spirit of the present invention.
In said drawings:
Fig. 1 shows in a partial perspective view an orbit-al equipment according to the invention, mounted on a pipe to be welded;
Fig. 2 shows in partial perspective view the orbital equipment of Fig. 1, with the weldirg systems in their swung-apart position;
Fig. 3 shows in a partial perspective vie~ and on enlarged scale the detail of the mounting system of the second welding wire bobbin, it too according to the in-vention.
Referring to the drawings, with 1 the edge to be weld-ed is shown of a pipe 2, on to which at a predetermined dis stance relatlvely to said edge 1, a circular rail 3 is mounted and fixed, leaning on to said pipe by means of pin-shaped spacers 4.
On the rail 3 a supporting base plate 6 is then fas~en ed, with moving possibility, through ~four slide raced wheels 5, on an end of whose supporting base plate 6 a second supporting plate 8 is hinged, by means of the rotation pin 7, such second supporting plate 8 being kept into contact with the base plate 6 by means of a quick-release locking hook 9, which, with being mo~nted at the other end of said base plate 6, causes its hook 9' to interact ;~ with the upper surface cf the other end of the said sec-ond supporting plate 8 (see speci~fically Fig. 1).
~aid second supporting plate 8 is moreover provided ~;~3~
with pairs of slots 10, extending in the circumferential direction of the rail 3, within which two supporting blocks, respectively 11 and 11 ' are bolted in paral-lel arrarlgement to each other. Said blocks 11 and 11', whose mutual distance is clearly adjustable as de3ired by taking advantages of the length of said slots 10, support two wel~ing systems complete, autonomous and positioned parallel to each other, of which the second one shall be hereinunder marked wit'n the same numbering as of the first one, but provided with a prime.
More specifically, each block 11, 11' supports, with the possibility of the adjustment thereof in the axial d rcction of the pipe 2 by means of the guide of the knob 12, 12', a frame 13, 13' which is in its turn vertically adjustable in the radial direction by means of the knob 14, 14'. Each frame 13, 13' ~upports then, with the pos-sibility of swinging movements, whose stroke can be adjust-ed by means of the knob 15, 15', a structure 16, 16' onto which a welding lance 18, 18' is fastened, by means of a projecting arm 17, 17'.
~he two lances 18, 18' are positioned in a parallel arrangement relatively to each other along the edge to be welded 1 (see specifically Fig. 1~ and are fed with the welding wire 19, 19' which is extracted from its relative bobbin 20, 20' by a driving mechanism 21, 21'.
Finally, the bobbin 20l of the welding wire 19' for ; the second lance 18', as it can be clearly seen in Fig. 3, is mounted on an arm 22 hinged in 23 on to a bracket 24 which is solid with said bloc'~ 11'.
3 Said arm 22, which allows the second bobbin 20' to be swung apart to the purpose of an easy replacement of ~3~
the first bobbin 20, is then kept f`ixed in its position by a locking key 25 which is screwed on an extension 26 of' said arm 22.
':
:;
::
~ ~ '
the first bobbin 20, is then kept f`ixed in its position by a locking key 25 which is screwed on an extension 26 of' said arm 22.
':
:;
::
~ ~ '
Claims (2)
1. Orbitary-moving equipment for the automatic welding of pipes, comprising a fixed portion of rail positioned and fixed around the pipe in a predetermined position relatively to the edge to be welded, as well as a movable portion constituted by a supporting base plate fastened with quick-fastening means on to the edges of the said rail through four raced wheels for sliding, and driven along said rail by a driving knurled pinion cooperating with an edge of the same rail, on which base plate a weld ing system is mounted, constituted by a block supporting the welding lance comprehensive of the devices necessary for the adjustment of its positioning and for its swinging motion, as well as the feeding device of the welding wire, comprising the welding wire bobbin and the mechanism for delivering the same wire, characterized in that it is provided with an analogous second welding system mount-ed in a parallel position to the first welding system on said base plate, so that the two welding lances are positioned parallel to each other along the edge to be welded, the two said welding systems being fixed at a mutual adjustable distance by fastening the said support-ing blocks with bolts housed within slots extending in the circumferential direction of the same rail, provid-ed on a second supporting plate which is in its turn hinged in correspondence of an end thereof on to an end of said supporting base plate and held in correspondence of its other end by a locking hook for the locking of said supporting base plate.
2. Orbitary-moving equipment according to claim 1, characterized in that the bobbin of the welding wire of the second welding system is rotatably mounted on an articulated arm, and is kept in its position by a locking key.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21254A/84 | 1984-06-05 | ||
| IT21254/84A IT1176263B (en) | 1984-06-05 | 1984-06-05 | IMPROVED EQUIPMENT FOR AUTOMATIC WELDING OF PIPES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1238089A true CA1238089A (en) | 1988-06-14 |
Family
ID=11179091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000482844A Expired CA1238089A (en) | 1984-06-05 | 1985-05-30 | Equipment for the automatic welding of pipes |
Country Status (24)
| Country | Link |
|---|---|
| JP (1) | JPS60261671A (en) |
| AU (1) | AU571091B2 (en) |
| BE (1) | BE902597A (en) |
| BR (1) | BR8502817A (en) |
| CA (1) | CA1238089A (en) |
| CS (1) | CS266330B2 (en) |
| DD (1) | DD232448A5 (en) |
| DE (2) | DE8516506U1 (en) |
| DK (1) | DK251885A (en) |
| ES (1) | ES8608370A1 (en) |
| FI (1) | FI852228L (en) |
| FR (1) | FR2565144B1 (en) |
| GB (1) | GB2159748B (en) |
| HU (1) | HUT45206A (en) |
| IT (1) | IT1176263B (en) |
| LU (1) | LU85922A1 (en) |
| NL (1) | NL8501596A (en) |
| NO (1) | NO852227L (en) |
| NZ (1) | NZ212234A (en) |
| PL (1) | PL253801A1 (en) |
| PT (1) | PT80593B (en) |
| RO (1) | RO93759B (en) |
| SE (1) | SE457067B (en) |
| YU (1) | YU93885A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3810759A1 (en) * | 1988-03-30 | 1989-10-12 | Balcke Duerr Ag | Method of welding pipes and webs to form a gas-tight pipe wall |
| WO1990014922A1 (en) * | 1989-05-30 | 1990-12-13 | Institut Elektrosvarki Imeni E.O.Patona Akademii Nauk Ukrainskoi Ssr | Installation for arc welding |
| JPH04104288U (en) * | 1991-02-15 | 1992-09-08 | 日本コンクリート工業株式会社 | Automatic welding machine for ready-made piles |
| GB2339134B (en) * | 1998-06-19 | 2002-03-06 | Allied Bakeries | Baking compositions |
| NL1011223C2 (en) † | 1999-02-05 | 2000-08-10 | Allseas Group Sa | Method and device for welding two pipes together. |
| CA2322736A1 (en) | 2000-10-10 | 2002-04-10 | O. J. Pipelines Canada | External pipe welding apparatus |
| GB0621780D0 (en) | 2006-11-01 | 2006-12-13 | Saipem Spa | Welding system |
| JP5163601B2 (en) * | 2009-07-03 | 2013-03-13 | Ｊｆｅエンジニアリング株式会社 | Method and apparatus for circumferential welding of fixed pipe |
| GB2536419A (en) * | 2015-03-10 | 2016-09-21 | Petrofac Ltd | Pipe assembly station |
| DE102016103526A1 (en) * | 2016-02-29 | 2017-08-31 | Christian Schmid | Self-propelled processing device |
| CN113290301B (en) * | 2021-06-01 | 2023-04-11 | 昆山安意源管道科技有限公司 | All-position automatic welding machine for pipeline |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3681560A (en) * | 1968-11-25 | 1972-08-01 | Midwestern Specialties Ltd | Method and means for welding pipe sections |
| AU478967B2 (en) * | 1973-03-05 | 1974-09-05 | Nippon Concrete Kogyo Kabushkikaisha | Automatic welding machine for welding an annular joint between concrete pile sections each having a steel end structure |
| IT1037330B (en) * | 1975-04-17 | 1979-11-10 | Saipem Spa | EQUIPMENT WITH ORBITAL MOVEMENT FOR THE AUTOMATIC WELDING OF PIPES |
| GB2027936B (en) * | 1978-08-11 | 1982-12-22 | Merrick Welding International | Automatic arc welding system |
-
1984
- 1984-06-05 IT IT21254/84A patent/IT1176263B/en active
-
1985
- 1985-05-28 SE SE8502622A patent/SE457067B/en not_active IP Right Cessation
- 1985-05-29 NZ NZ212234A patent/NZ212234A/en unknown
- 1985-05-30 CA CA000482844A patent/CA1238089A/en not_active Expired
- 1985-05-30 LU LU85922A patent/LU85922A1/en unknown
- 1985-06-03 NL NL8501596A patent/NL8501596A/en not_active Application Discontinuation
- 1985-06-03 NO NO852227A patent/NO852227L/en unknown
- 1985-06-04 GB GB08514104A patent/GB2159748B/en not_active Expired
- 1985-06-04 FI FI852228A patent/FI852228L/en not_active Application Discontinuation
- 1985-06-04 PL PL25380185A patent/PL253801A1/en unknown
- 1985-06-04 FR FR8508418A patent/FR2565144B1/en not_active Expired
- 1985-06-04 DK DK251885A patent/DK251885A/en not_active Application Discontinuation
- 1985-06-04 HU HU852204A patent/HUT45206A/en unknown
- 1985-06-04 YU YU00938/85A patent/YU93885A/en unknown
- 1985-06-04 PT PT80593A patent/PT80593B/en unknown
- 1985-06-05 ES ES544560A patent/ES8608370A1/en not_active Expired
- 1985-06-05 DE DE8516506U patent/DE8516506U1/en not_active Expired
- 1985-06-05 AU AU43328/85A patent/AU571091B2/en not_active Ceased
- 1985-06-05 BR BR8502817A patent/BR8502817A/en unknown
- 1985-06-05 DD DD85277053A patent/DD232448A5/en unknown
- 1985-06-05 CS CS854032A patent/CS266330B2/en unknown
- 1985-06-05 RO RO119048A patent/RO93759B/en unknown
- 1985-06-05 BE BE0/215140A patent/BE902597A/en not_active IP Right Cessation
- 1985-06-05 JP JP60120737A patent/JPS60261671A/en active Pending
- 1985-06-05 DE DE19853520241 patent/DE3520241A1/en not_active Ceased
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