CN109014644A - A kind of runner elbow-making method - Google Patents
A kind of runner elbow-making method Download PDFInfo
- Publication number
- CN109014644A CN109014644A CN201811160794.2A CN201811160794A CN109014644A CN 109014644 A CN109014644 A CN 109014644A CN 201811160794 A CN201811160794 A CN 201811160794A CN 109014644 A CN109014644 A CN 109014644A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- elbow
- wall
- arc
- making method
- 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.)
- Pending
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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/08—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for flash removal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of runner elbow-making methods, port is tilted by the docking processed between different pipelines, realize that each pipeline can be fabricated to the bending angle of required elbow, the fabrication platform is corresponding with the outer wall of the pipeline, improve each pipeline merging precision, annular ring can protect the horizontal port indeformable, support frame as described above protects the horizontal port and the inclination port indeformable on inner wall, further improve the welding precision of each pipeline, and it can also play a protective role in the elbow transportational process of annular ring and support frame as described above after manufacturing, the elbow is avoided to collide with deformation, the production method is simple and effective, energy quick Fabrication goes out to meet the requirements, good forming effect and runner elbow with high accuracy.
Description
Technical field
The present invention relates to shipbuilding technical field more particularly to a kind of runner elbow-making methods.
Background technique
In ship domain, as a kind of special propulsion mode, it is to be sucked water by the suction inlet of hull bottom for hydraulic jet propulsion
Then runner sprays the reaction force of high-velocity flow from the spray pump of nozzle to push ship to advance.Steel runner elbow is made
It is not standard component for the connector of runner Ship Structure and equipment spout, it is shipyard self-made components that equipment manufacturer, which does not provide,
It is very high to make molding required precision, can not connect, influence whole with water inlet flow channel as molding tolerances will result directly in greatly spout
The fabrication and installation of a runner.
Therefore, in order to ensure that the production of steel elbow forms, need a kind of production method control steel in production welding process curved
The molding effect of head, guarantees its formed precision.
Summary of the invention
In order to overcome the shortcomings of the prior art, the present invention provides a kind of good forming effect and guarantees in transportational process not
Easily-deformable runner elbow-making method.
In order to solve the above-mentioned technical problems, the present invention provides a kind of runner elbow-making methods, comprising:
S1, the pipeline after at least two sections roll is obtained, the inclination of the pipeline is processed according to the angle of turn of required elbow
The inclination port of port, the adjacent pipeline is connected to each other to form ring interface, and the two-port positioned at the elbow is processed into level
Port；
S2, corresponding fabrication platform is selected according to the outer wall dimension of the pipeline, and all pipelines is placed in institute
It states on fabrication platform；
S3, two annular rings are processed according to the outer wall dimension of the pipeline, using welding equipment by two annular rings
It is respectively welded at two horizontal ports；
Support frame as described above, is fixed on the inner wall of the pipeline by S4, the inner wall size process support frame according to the pipeline
On, support is formed to the horizontal port and the beveled end mouth；
S5, all pipelines are successively stacked into installation, the ring interface is welded using the welding equipment, it will
Weld seam on the inside and outside wall of the pipeline carries out grinding process, removes welding oxide layer.
Preferably, include: to obtain the thin plate consistent with the wall thickness of the pipeline in the step S3, pass through machine
Bed is processed into annular ring.
Preferably, in the step S3 further include: the outer radius values of annular ring are 75mm bigger than inner radius values,
Annular ring is welded on the outer wall of the pipeline.
It preferably, include: that support frame as described above includes a word support rod and cross support bar, institute in the step S4
It states a word support rod to be fixed on the inner wall of the pipeline and form support to the horizontal ends mouth, the cross support bar is fixed on
The inner wall of the pipeline and to the beveled end mouth formed support.
Preferably, in the step S4 further include: be between the word support rod and the inner wall of the pipeline
Spot welding is fixed, and is fixed between the cross support bar and the inner wall of the pipeline for spot welding.
Preferably, in the step S4 further include: the word support rod and the cross support bar use
Width is 50mm, is process with a thickness of the angle steel of 5mm.
Preferably, in the step S4 further include: the plane where the word support rod is compared to the water
Plane where flush end mouth deviates 20mm toward the middle part of the pipeline, and the plane where the cross support bar is inclined compared to described
Plane where splay end mouth deviates 20mm toward the middle part of the pipeline.
It preferably, include: that the uniform plane where the ring interface is divided into several in the step S5
Fan section, if the arc side in each fan section is evenly dividing again as arterial highway arc-shaped welding seam, with the center of circle point symmetry of the ring interface
2 described in arc-shaped welding seam be one group welded, the arc-shaped welding seam on the different fan sections alternately welds.
It preferably, include: that the uniform plane where the ring interface is divided into 4 90 ° in the step S5
Fan section, the arc side in each fan section is evenly dividing again as 3 arc-shaped welding seams, symmetrical with the centre point of the ring interface
Arc-shaped welding seam described in 2 is one group and is welded that the arc-shaped welding seam on the different fan sections alternately welds, each institute
The welding sequence direction for stating the arc-shaped welding seam on fan section is opposite with the growing direction of the arc-shaped welding seam.Preferably,
The welding equipment is that argon arc adds fibril welding set.
Runner elbow-making method provided by the embodiment of the present invention, compared with prior art, the beneficial effect is that: this hair
The bright docking by processing between different pipelines tilts port, realizes that each pipeline can be fabricated to the bending angle of required elbow,
The fabrication platform is corresponding with the outer wall of the pipeline, improves each pipeline merging precision, and annular ring can protect institute
It is indeformable to state horizontal port, support frame as described above protects the horizontal port and the inclination port indeformable on inner wall, into one
Step improves the welding precision of each pipeline, and in the elbow transportational process of annular ring and support frame as described above after manufacturing
It can also play a protective role, the elbow is avoided to collide with deformation, the made elbow-making precision come out is high, at low cost
And structure is simply firm, the production method is simple and effective, and energy quick Fabrication goes out to meet the requirements, good forming effect and precision are high
Elbow.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the elbow produced using the runner elbow-making method of the preferred embodiment of the invention.
Fig. 2 is the structural schematic diagram in the direction A-A in Fig. 1.
Fig. 3 is the structural schematic diagram in the direction B-B in Fig. 1.
Fig. 4 is the welding sequence and the signal of weld seam growing direction of the runner elbow-making method of the preferred embodiment of the invention
Figure.
In figure: 1. pipelines；2. annular ring；3. a word support rod；4. cross support bar.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 1 to 4, the preferred embodiment of the invention provides a kind of runner elbow-making method, comprising:
S1, the pipeline 1 after at least two sections roll is obtained, inclining for the pipeline 1 is processed according to the angle of turn of required elbow
The inclination port of splay end mouth, the adjacent pipeline 1 is connected to each other to form ring interface, and the two-port positioned at the elbow is processed into water
Flush end mouth；
S2, corresponding fabrication platform is selected according to the outer wall dimension of the pipeline 1, and all pipelines 1 is placed in
On the fabrication platform；
S3, two annular rings 2 are processed according to the outer wall dimension of the pipeline 1, using welding equipment by two annulars
Circle 2 is respectively welded at two horizontal ports；
S4, the inner wall size process support frame according to the pipeline 1, support frame as described above is fixed in the pipeline 1
On wall, support is formed to the horizontal port and the beveled end mouth；
S5, all pipelines 1 are successively stacked into installation, the ring interface are welded using the welding equipment,
Weld seam on the inside and outside wall of the pipeline 1 is subjected to grinding process, removes welding oxide layer.
Runner elbow-making method based on above-mentioned technical characteristic passes through the docking beveled end processed between different pipelines 1
Mouthful, realize that each pipeline 1 can be fabricated to the bending angle of required elbow, the fabrication platform is opposite with the outer wall of the pipeline 1
It answers, improves each 1 merging precision of pipeline, annular ring 2 can protect the horizontal port indeformable, including support frame as described above
It protects the horizontal port and the inclination port indeformable on wall, further improves the welding precision of each pipeline 1, and
It can also play a protective role, avoid described curved in the elbow transportational process of annular ring 2 and support frame as described above after manufacturing
Head collides with deformation, as shown in Figure 1, the made elbow-making precision come out is high, at low cost and structure simply consolidates, this
Production method is simple and effective, can quick Fabrication go out to meet the requirements, good forming effect and elbow with high accuracy.
Further, include: to obtain the thin plate consistent with the wall thickness of the pipeline 1 in the step S3, pass through lathe
It is processed into annular ring 2, specifically, can be by numerically-controlled machine tool punch process at annular ring 2, manufacture is simply fast
It is prompt.
Further, in the step S3 further include: the outer radius values of annular ring 2 are 75mm bigger than inner radius values, institute
It states annular ring 2 to be welded on the outer wall of the pipeline 1, guarantees that annular ring 2 has certain intensity.
It further, include: that support frame as described above includes a word support rod 3 and cross support bar 4 in the step S4, it is described
One word support rod 3, which is fixed on the inner wall of the pipeline 1 and is formed to the horizontal ends mouth, to be supported, and the cross support bar 4 is fixed
In the pipeline 1 inner wall and to the beveled end mouth formed support, as shown in Figures 2 and 3, the horizontal port is by the ring
Support is fixed in shape circle 2 and the word support rod 3, and the cross support bar 4 is conducive to that the inclination port is kept to weld
It is firm in termination process.
Further, in the step S4 further include: be point between the word support rod 3 and the inner wall of the pipeline 1
Solid welding is fixed, fixes between the cross support bar 4 and the inner wall of the pipeline 1 for spot welding, support frame as described above is after the completion of welding
It needs not to be removed, support frame as described above can also during transportation play a protective role to the elbow, and spot welding is fixed convenient in institute
It is removed before stating elbow installation, guarantees the integrality of the shape of the elbow.
Further, in the step S4 further include: the word support rod 3 and the cross support bar 4 preferentially use
Width is 50mm, is process with a thickness of the angle steel of 5mm, and processing cost is low, stabilized structure.
Further, in the step S4 further include: the plane where the word support rod 3 is compared to the horizontal ends
Plane where mouthful deviates 20mm toward the middle part of the pipeline 1, and the plane where the cross support bar 4 is compared to the inclination
Plane where port deviates 20mm toward the middle part of the pipeline 1, avoids, is avoided the word support rod 3 to weld seam
It is welded in the pipeline 1 with the cross support bar 4.
It further, include: that the uniform plane where the ring interface is divided into several sectors in the step S5
Area, if the arc side in each fan section is evenly dividing again as arterial highway arc-shaped welding seam, with the centre point of the ring interface symmetrical 2
The arc-shaped welding seam is one group and is welded that the arc-shaped welding seam on the different fan sections alternately welds, due to weldering
Weld seam is heated when connecing, and the ring interface can expand with heat and contract with cold and be deformed, and the ring interface is divided into multiple-pass weld and is carried out
Welding, it is possible to reduce the continuous heating time of longer weld seam, to avoid temperature is excessively high from causing excessive deformation.
Specifically, including: that the uniform plane where the ring interface is divided into C, D, E, F totally 4 in the step S5
90 ° of fan section, the arc side in each fan section is evenly dividing again as 3 arc-shaped welding seams, with the centre point pair of the ring interface
2 described in arc-shaped welding seam be referred to as one group and welded that the arc-shaped welding seam on the different fan sections alternately welds,
For example, arc-shaped welding seam described in one group of point symmetry is further continued for the welding area D and F by two welders first weldings simultaneously in the area C and the area E
Arc-shaped welding seam described in one group of point symmetry in area realizes that the arc-shaped welding seam on the different fan sections alternately welds, each fan
The welding sequence direction of 3 arc-shaped welding seams in shape area and the arc-shaped welding seam growing direction are on the contrary, reduce the temperature at weld seam both ends
It is poor to spend, and the welding sequence opposite with welding growing direction can make residual stress in the inclination port cancel out each other, thus again
Deformation is further decreased, as shown in figure 4, this implementation is preferentially welded using the welding sequence organized from a group to f, the increasing of weld seam
Length direction is as shown by arrows in figure.Further, the welding equipment preferentially uses argon arc to add fibril welding set, and reduction is fabricated to
This.
In conclusion the runner elbow-making method in the embodiment of the present invention has the advantage that (1) guarantees the elbow
Molding effect after welding processing；(2) it plays a protective role in the transport process after the completion of elbow-making, avoids colliding with
Deformation improves yields；(3) ring interface is divided into multistage welding in the welding process, effectively avoids welding deformation, improved
The formed precision of product.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of runner elbow-making method, which comprises the following steps:
S1, the pipeline after at least two sections roll is obtained, the inclination port of the pipeline is processed according to the angle of turn of required elbow,
The inclination port of the adjacent pipeline is connected to each other to form ring interface, is processed into horizontal port positioned at the two-port of the elbow；
S2, corresponding fabrication platform is selected according to the outer wall dimension of the pipeline, and all pipelines is placed in the dress
It welds on platform；
S3, two annular rings are processed according to the outer wall dimension of the pipeline, is distinguished two annular rings using welding equipment
It is welded at two horizontal ports；
S4, the inner wall size process support frame according to the pipeline, support frame as described above are fixed on the inner wall of the pipeline, right
The horizontal port and the beveled end mouth form support；
S5, all pipelines are successively stacked into installation, the ring interface is welded using the welding equipment, it will be described
Weld seam on the inside and outside wall of pipeline carries out grinding process, removes welding oxide layer.
2. runner elbow-making method according to claim 1, which is characterized in that include: in the step S3 obtain with
The consistent thin plate of the wall thickness of the pipeline, by machine tooling at annular ring.
3. runner elbow-making method according to claim 2, which is characterized in that in the step S3 further include: described
The outer radius values of annular ring are 75mm bigger than inner radius values, and annular ring is welded on the outer wall of the pipeline.
4. runner elbow-making method according to claim 1, which is characterized in that include: the branch in the step S4
Support includes a word support rod and cross support bar, and the word support rod is fixed on the inner wall of the pipeline and to the level
Port forms support, and the cross support bar, which is fixed on the inner wall of the pipeline and is formed to the beveled end mouth, to be supported.
5. runner elbow-making method according to claim 4, which is characterized in that in the step S4 further include: described
It is fixed between one word support rod and the inner wall of the pipeline for spot welding, is between the cross support bar and the inner wall of the pipeline
Spot welding is fixed.
6. runner elbow-making method according to claim 4, which is characterized in that in the step S4 further include: described
It is 50mm that one word support rod and the cross support bar, which use width, is process with a thickness of the angle steel of 5mm.
7. runner elbow-making method according to claim 4, which is characterized in that in the step S4 further include: described
Plane where one word support rod deviates 20mm toward the middle part of the pipeline compared to the plane where the horizontal port, described
Plane where cross support bar deviates 20mm toward the middle part of the pipeline compared to the plane where the inclination port.
8. runner elbow-making method according to claim 1, which is characterized in that including: in the step S5 will be described
Uniform plane where ring interface is divided into several fan sections, if the arc side in each fan section is evenly dividing again as arterial highway arc
Shape weld seam is one group with arc-shaped welding seam described in the centre point of the ring interface symmetrical 2 and is welded, in the different fans
Arc-shaped welding seam in shape area alternately welds.
9. runner elbow-making method according to claim 8, which is characterized in that including: in the step S5 will be described
Uniform plane where ring interface is divided into 4 90 ° of fan section, and the arc side in each fan section is evenly dividing again as 3 arcs
Shape weld seam is one group with arc-shaped welding seam described in the centre point of the ring interface symmetrical 2 and is welded, in the different fans
Arc-shaped welding seam in shape area alternately welds, the welding sequence direction of the arc-shaped welding seam on each fan section and the arc
The growing direction of weld seam is opposite.
10. runner elbow-making method according to claim 1 to 9, which is characterized in that the welding equipment
For argon arc plus fibril welding set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160794.2A CN109014644A (en) | 2018-09-30 | 2018-09-30 | A kind of runner elbow-making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160794.2A CN109014644A (en) | 2018-09-30 | 2018-09-30 | A kind of runner elbow-making method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109014644A true CN109014644A (en) | 2018-12-18 |
Family
ID=64615514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811160794.2A Pending CN109014644A (en) | 2018-09-30 | 2018-09-30 | A kind of runner elbow-making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109014644A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296478A (en) * | 2020-10-23 | 2021-02-02 | 中船黄埔文冲船舶有限公司 | Welding process for large-diameter large-thickness high-strength steel cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5015459B1 (en) * | 1969-12-15 | 1975-06-05 | ||
| CN102059514A (en) * | 2010-11-24 | 2011-05-18 | 安徽富煌钢构股份有限公司 | Processing method of small-curvature and small-angle bent pipe |
| CN102626842A (en) * | 2012-05-02 | 2012-08-08 | 四川蓝星机械有限公司 | Welding method for circular seam of mitre elbow pipeline casing |
| CN103692128A (en) * | 2013-11-30 | 2014-04-02 | 南京梅山冶金发展有限公司 | Multi-specification combined elbow welding tool and welding method for same |
| CN103692171A (en) * | 2014-01-10 | 2014-04-02 | 点夺机电工程江苏有限公司 | Making method of shrimp elbow |
-
2018
- 2018-09-30 CN CN201811160794.2A patent/CN109014644A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5015459B1 (en) * | 1969-12-15 | 1975-06-05 | ||
| CN102059514A (en) * | 2010-11-24 | 2011-05-18 | 安徽富煌钢构股份有限公司 | Processing method of small-curvature and small-angle bent pipe |
| CN102626842A (en) * | 2012-05-02 | 2012-08-08 | 四川蓝星机械有限公司 | Welding method for circular seam of mitre elbow pipeline casing |
| CN103692128A (en) * | 2013-11-30 | 2014-04-02 | 南京梅山冶金发展有限公司 | Multi-specification combined elbow welding tool and welding method for same |
| CN103692171A (en) * | 2014-01-10 | 2014-04-02 | 点夺机电工程江苏有限公司 | Making method of shrimp elbow |
Non-Patent Citations (5)
| Title |
|---|
| 《水利水电工程施工实用手册》编委会: "《金属结构制造与安装（上册）》", 31 December 2017, 中国环境出版社 * |
| 徐桂兰: "《工程材料及热加工工艺基础》", 30 June 2011, 西南交通大学出版社 * |
| 核电秦山联营有限公司: "《秦山核电二期工程建设经验汇编（施工卷Ⅱ）》", 30 June 2004, 原子能出版社 * |
| 邱葭菲 等: "《实用焊接技术 焊接方法工艺质量控制技能技巧与考证竞赛》", 31 October 2010, 湖南科学技术出版社 * |
| 高元德: "《焊工常识（上部）》", 31 October 2008, 海天出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296478A (en) * | 2020-10-23 | 2021-02-02 | 中船黄埔文冲船舶有限公司 | Welding process for large-diameter large-thickness high-strength steel cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0022605B1 (en) | Method of producing clad steel materials | |
| KR101483646B1 (en) | Clad pipe manufactured by the manufacturing method, and clad pipe connected by the connecting method | |
| WO2020147860A1 (en) | Method for forming nozzle component of aerospace engine | |
| CN109014644A (en) | A kind of runner elbow-making method | |
| CN104889581A (en) | Deformation preventing process for welding dense connecting tubes on thin-wall barrel body | |
| US6217824B1 (en) | Combined forged and cast lance tip assembly | |
| CN101332600A (en) | Blanking method of multi-node knee | |
| RU2510784C1 (en) | Method of making high-pressure welded vessels | |
| JP4044730B2 (en) | Method for producing a metal sheet rotationally symmetric body having a double curved surface and varying thickness | |
| US9765677B2 (en) | Catalyst casing-integrated exhaust manifold and method for manufacturing same | |
| CN103753161B (en) | A kind of processing technology for the cooling heat(ing) coil on main equipment | |
| JPH05293661A (en) | Production of clad steel tube excellent in corrosion resistance | |
| CN112846500B (en) | Welding deformation control method | |
| CN114043086A (en) | Laser welding method of spiral tube bundle type spray pipe | |
| JP5482879B1 (en) | Method for producing forged steel pipe excellent in workability and forged steel pipe | |
| JP3781456B2 (en) | Method and apparatus for hot bending metal tube | |
| JP3409945B2 (en) | Method for producing metal strip having thick part | |
| CN110014250A (en) | A kind of welded steel workbench with refrigerating function | |
| CN115178938A (en) | Jacketed pipe welding method capable of reducing weld seam surplus height | |
| JPH07275954A (en) | Production of electric resistance welded tube | |
| RU2192342C2 (en) | Method for making articles symmetrical relative to rotation axis of sheet metal with surface of double curvature and variable thickness of material | |
| CN114951916B (en) | Method for welding shield beam bent cover plate on downhill of robot | |
| CN106181104B (en) | A kind of new-type welding groove of large-scale steel pipe | |
| JPS6156792A (en) | Manufacture of extreme thin wall welded tube | |
| CN113909651A (en) | Welding method for calandria |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |