CN112222741A - Pipe fitting welding tool and method for ensuring butt joint coaxiality - Google Patents
Pipe fitting welding tool and method for ensuring butt joint coaxiality Download PDFInfo
- Publication number
- CN112222741A CN112222741A CN202010957588.5A CN202010957588A CN112222741A CN 112222741 A CN112222741 A CN 112222741A CN 202010957588 A CN202010957588 A CN 202010957588A CN 112222741 A CN112222741 A CN 112222741A
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- Prior art keywords
- copper
- pipe
- base
- lining
- upper cover
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Classifications
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- 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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
-
- 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
- B23K31/027—Making tubes with 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The utility model provides a guarantee pipe fitting welding frock and method of butt joint axiality for the assembly welding of the inner tube of marine low-speed diesel stainless steel double-walled pipe, pipe fitting welding frock includes: the platform is positioned at the bottom of the whole device; the base is fixed on the upper part of the platform, and a semicircular groove is formed in the upper part of the base; the upper cover is fixedly connected with the base through a fastening bolt, and a semicircular groove is formed in the lower part of the upper cover; the copper lining is in a semicircular ring shape and is embedded in the semicircular groove of the base; the copper outer lining is the same as the copper inner lining in structure and is embedded in the semicircular groove of the upper cover; the copper lining and the copper outer lining are combined, and the inner pipe is clamped in the copper inner lining and the copper outer lining, so that the coaxiality of the pipe fitting is guaranteed. The invention can gradually correct deformation by section-by-section operation, ensures the dimensional precision, stabilizes the product quality, improves the operation efficiency, and can be used for welding and assembling all stainless steel pipe fittings.
Description
Technical Field
The invention relates to a manufacturing process of a marine low-speed diesel engine, in particular to a pipe fitting welding tool and a pipe fitting welding method for ensuring butt joint coaxiality, and belongs to the technical field of diesel engine manufacturing.
Background
The pollution caused by the ship exhaust to the atmosphere has attracted extensive attention of the international society, and the dual-fuel engine has become an important development direction of the ship engine technology. The stainless steel double-wall pipe is an important component of a dual-fuel main engine, the double-wall pipe for the marine low-speed diesel engine is generally a stainless steel thin-wall pipe, and the control of the dimensional accuracy is very important in the manufacturing process. Because the stainless steel pipe has low heat conduction efficiency, the heat generated in the welding process is easy to cause welding deformation, the inner pipe is firstly welded and then the outer pipe is assembled and welded when the double-wall stainless steel pipe is manufactured, and the manufacturing precision of the double-wall pipe can be seriously influenced by the out-of-tolerance of the assembling and manufacturing size of the inner pipe. The traditional manufacturing method of the inner pipe is to assemble and spot-weld all sections of pipes, and then weld each welding line. However, each welding process generates a small amount of welding deformation, and after a plurality of welding seams are welded, the welding deformation is accumulated and amplified, so that the central axis of the whole pipe is bent, the size precision of the pipe cannot be guaranteed, and the installation of the main pipe is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a pipe fitting welding tool and a pipe fitting welding method for ensuring the butt joint coaxiality, so that the butt joint assembly coaxiality of inner pipes of a stainless steel double-wall pipe is ensured, the deformation of the inner pipes after assembly and welding is reduced, the production and manufacturing precision of the stainless steel double-wall pipe is improved, and the production efficiency of the welding operation of the stainless steel double-wall pipe is improved.
Based on the above purpose, the technical scheme provided by the invention is as follows:
a pipe fitting welding tool for ensuring butt joint coaxiality is used for assembling and welding an inner pipe of a stainless steel double-wall pipe for a marine low-speed diesel engine, wherein the pipe diameter of the inner pipe is
Its characterized in that, pipe fitting welding frock include:
the platform is positioned at the bottom of the whole device;
the base is fixed on the upper part of the platform, and a semicircular groove is formed in the upper part of the base;
the upper cover is fixedly connected with the base through a fastening bolt, and a semicircular groove is formed in the lower part of the upper cover;
the copper lining is in a semicircular ring shape and is embedded in the semicircular groove of the base;
the copper outer lining is the same as the copper inner lining in structure and is embedded in the semicircular groove of the upper cover;
the copper inner liner is jointed with the copper outer liner, and the inner pipe is clamped in the copper inner liner.
As a further improvement, the upper plane of the platform is provided with two rows of mounting holes for fixing the bases, and the mounting holes are waist-shaped holes for adjusting the distance between the two bases.
As a further improvement, the lower part of the base is provided with a concave groove which is clamped on the upper part of the platform, the width of the concave groove is equal to that of the platform, and the inner side surface of the concave groove is contacted with the side surface of the platform.
As a further improvement, the semicircular groove of the upper cover and the semicircular groove of the base form a whole circular groove, and the axes of the whole circular grooves of the plurality of bases and the upper cover are the same.
As a further improvement, the radius of the copper lining and the radius of the copper lining can be replaced according to the outer diameter of the inner pipe.
As a further improvement, the lower part of the base is provided with four through holes for fixing with the platform.
As a further improvement, the base is provided with two threaded holes, and the upper cover is provided with two through holes for installing and fixing the upper cover and the base through the fastening bolts.
As a further improvement, the number of the base, the upper cover, the copper inner lining and the copper outer lining is at least four.
The other technical scheme of the invention is as follows:
a pipe fitting welding method for guaranteeing butt joint coaxiality is realized through the pipe fitting welding tool, and the pipe fitting welding method comprises the following specific steps:
1) adjusting the distance between the bases according to the length of the inner pipe to be welded;
2) fixing the base on the platform through fastening bolts;
3) a copper lining matched with the outer diameter of the inner pipe to be welded is arranged in the semicircular groove of the base;
4) placing two sections of stainless steel inner pipes to be welded on the copper lining of the base, and supporting one section of the inner pipe to be welded by the two bases;
5) adjusting the welding gap between two sections of inner pipes to be welded;
6) a copper outer lining matched with the outer diameter of the inner pipe to be welded is arranged in the semicircular groove of the upper cover;
7) fixing the upper cover with the copper outer lining and the base through fastening bolts to clamp the inner pipe to be welded;
8) spot welding the two sections of fixed inner pipes to be welded, and then carrying out full-seam welding;
9) waiting for the weld joint to cool;
10) repeating the steps 4) to 9) to assemble and weld the third section of inner pipe to be welded;
11) and repeating the steps, assembling and welding the inner pipes to be welded section by section until the inner pipes to be welded are completely assembled and welded, cooling the welding seams and then removing the upper cover to complete the assembling and welding of the inner pipes of the stainless steel double-wall pipe for the marine low-speed diesel engine.
Compared with the traditional assembly welding mode of the double-wall stainless steel inner pipe, the invention achieves the following effects:
1. the problem of stainless steel pipe welding deformation be difficult to control is solved. A stainless steel pipe is assembled every time, and a welding seam is welded, so that the previous welding deformation can be corrected during subsequent assembly, the condition that multiple welding seams are welded simultaneously, welding deformation is accumulated and amplified infinitely, and finally the dimensional accuracy cannot be guaranteed is avoided.
2. The manufacturing efficiency of the double-wall stainless steel inner pipe is improved. The parameters of coaxiality, verticality, size and the like of butt joint of stainless steel pipes, particularly double-wall stainless steel pipes, need to be measured for many times in the assembling process, and the positions of assembled parts need to be adjusted from time to ensure the coaxiality of the pipes; the invention greatly shortens the workload of assembly, measurement and adjustment and improves the pipe manufacturing efficiency.
3. The product quality state is stable. The pipe welding tool and the manufacturing method can stabilize the manufacturing quality of the stainless steel double-wall pipe, and the instability of product quality caused by the working state or assembly skill level of operators can be avoided.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic view of a platform.
Fig. 3 is a schematic view of a base.
Fig. 4 is a schematic view of the upper cover.
Fig. 5 is a schematic view of a copper inner (or outer) liner.
In the figure, the position of the upper end of the main shaft,
1-platform, 2-base, 3-upper cover, 4-copper lining, 5-copper outer lining, 6-inner pipe to be assembled, 7-fastening bolt, 8-fastening bolt, 11-kidney-shaped hole, 21-semicircular groove, 22-concave groove and 31-semicircular groove.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples. All equivalent changes and modifications made according to the contents of the present specification should fall within the scope of the claims of the present application.
Referring to fig. 1, a pipe welding tool is shown for assembling and welding an inner pipe of a stainless steel double-walled pipe for a marine low-speed diesel engine, the inner pipe having a pipe diameter of
The pipe fitting welding tool comprises a platform 1, a plurality of bases 2, a plurality of upper covers 3, a plurality of copper linings 4 and a plurality of copper outer linings 5.
The platform 1 is located at the bottom of the whole device and is a foundation of the whole device, please refer to fig. 2, two rows of waist-shaped holes 11 are formed on the upper plane of the platform 1 and are used for fixing the bases 2, and the installation distance between the two bases 2 can be adjusted through the waist-shaped holes.
The base 2 is fixed on a kidney-shaped hole 11 of the platform 1 through a fastening bolt 7; referring to fig. 3, the upper portion of the base 2 is provided with a semicircular groove 21 for installing the copper lining 4, the lower portion is provided with a concave groove 22 clamped on the upper portion of the platform 1, the width of the concave groove 22 is equal to that of the platform 1, and the inner side surface of the groove is in contact with the side surface of the platform 1. Two threaded holes 23 are formed in the base 2 and used for being fixed with the upper cover 3 through fastening bolts 8. The lower part of the base is provided with four through holes for fixing with the platform 1.
The upper cover 3 is fixedly connected with the base 2 through a fastening bolt 8, referring to fig. 4, the lower part of the upper cover 3 is a semicircular groove 31 for mounting the copper outer lining 5. The upper cover 3 is provided with two through holes 32 for the fastening bolts 8 to pass through.
Referring to fig. 5, the copper lining 4 is a semicircular ring shape and is embedded in the semicircular groove 21 of the base 2. The copper outer lining 5 and the copper inner lining 4 have the same structure and are embedded in the semicircular groove 31 of the upper cover 3. The radius of the copper inner liner 4 and the copper outer liner 5 can be changed according to the outer diameter of the inner pipe 6 to be assembled.
Referring to fig. 1, after the upper cover 3 and the base 2 are fixedly mounted, the semicircular groove 21 and the semicircular groove 31 form a complete circular groove, and the axes of the complete circular grooves of the plurality of bases 2 and the upper cover 3 are the same; the copper inner lining 4 and the copper outer lining 5 are oppositely matched to clamp the stainless steel inner pipe 6 to be assembled in a sliding mode.
The number of the base 2, the upper cover 3, the copper inner lining 4 and the copper outer lining 5 is at least four.
The pipe welding method for ensuring the butt joint coaxiality realized by the pipe welding tool comprises the following specific steps (see figure 1):
1) the distance between the bases 2 is adjusted according to the length of the inner pipe 6 to be assembled;
2) fixing the base 2 on a kidney-shaped hole 11 of the platform 1 through a fastening bolt 7;
3) a copper lining 4 matched with the outer diameter of the inner pipe 6 to be assembled is arranged in the semicircular groove 21 of the base 2;
4) placing two sections of inner pipes 6 to be assembled on the copper lining 4 of the base 2, and supporting one section of the inner pipe 6 to be assembled by the two bases 2;
5) adjusting the welding gap between two sections of inner pipes 6 to be assembled;
6) a copper outer lining 5 matched with the outer diameter of the inner pipe 6 to be assembled is arranged in the semicircular groove 31 of the upper cover 3;
7) fixing the upper cover 3 with the copper outer lining 5 and the base 2 through a fastening bolt 8 to clamp the inner pipe 6 to be assembled;
8) spot welding is carried out on the two sections of fixed inner pipes 6 to be assembled, and then full seam welding is carried out;
9) waiting for the weld joint to cool;
10) repeating the steps 4) to 9) to assemble and weld the third section of inner pipe 6 to be assembled;
11) and repeating the steps, assembling a section of the inner pipe 6 to be assembled, welding a section of the inner pipe 6 to be assembled until the inner pipes 6 to be assembled are completely assembled and welded, cooling the welding seam, then removing the upper cover 3, and completing the assembling and welding of the inner pipe 6 to be assembled.
The scope of the invention is not limited to the embodiments described above, but also encompasses other variants and alternatives which are obvious for the invention.
Claims (9)
1. A pipe fitting welding tool for ensuring butt joint coaxiality is used for assembling and welding an inner pipe of a stainless steel double-wall pipe for a marine low-speed diesel engine, wherein the pipe diameter of the inner pipe is
Its characterized in that, pipe fitting welding frock include:
the platform is positioned at the bottom of the whole device;
the base is fixed on the upper part of the platform, and a semicircular groove is formed in the upper part of the base;
the upper cover is fixedly connected with the base through a fastening bolt, and a semicircular groove is formed in the lower part of the upper cover;
the copper lining is in a semicircular ring shape and is embedded in the semicircular groove of the base;
the copper outer lining is the same as the copper inner lining in structure and is embedded in the semicircular groove of the upper cover;
the copper inner liner is jointed with the copper outer liner, and the inner pipe is clamped in the copper inner liner.
2. The pipe fitting welding tool for ensuring the butt joint coaxiality of claim 1, wherein two rows of mounting holes for fixing the bases are formed in the upper plane of the platform, and the mounting holes are waist-shaped holes and are used for adjusting the distance between the two bases.
3. The pipe fitting welding tool capable of ensuring the coaxiality of the butt joints as claimed in claim 1, wherein a concave groove is formed in the lower portion of the base and clamped on the upper portion of the platform, the width of the concave groove is equal to that of the platform, and the inner side face of the concave groove is in contact with the side face of the platform.
4. The pipe fitting welding tool for ensuring the butt joint coaxiality of claim 1, wherein the semicircular groove of the upper cover and the semicircular groove of the base form a whole circular groove, and the axes of the whole circular grooves of the plurality of bases and the upper cover are the same.
5. The pipe fitting welding tool capable of ensuring the butt joint coaxiality of claim 1, wherein the radius of the copper lining and the radius of the copper lining can be replaced according to the outer diameter of the inner pipe.
6. The pipe fitting welding tool for ensuring the butt joint coaxiality of claim 1, wherein four through holes are formed in the lower portion of the base and used for being fixed with the platform.
7. The pipe fitting welding tool for ensuring the butt joint coaxiality of claim 1, wherein the base is provided with two threaded holes, and the upper cover is provided with two through holes for installing and fixing the upper cover and the base through the fastening bolts.
8. The pipe fitting welding tool for ensuring the butt joint coaxiality of claim 1, wherein the number of the base, the upper cover, the copper inner lining and the copper outer lining is at least four.
9. A pipe welding method for guaranteeing butt joint coaxiality realized by the pipe welding tool of claim 1 is characterized by comprising the following specific steps:
1) adjusting the distance between the bases according to the length of the inner pipe to be welded;
2) fixing the base on the platform through fastening bolts;
3) a copper lining matched with the outer diameter of the inner pipe to be welded is arranged in the semicircular groove of the base;
4) placing two sections of stainless steel inner pipes to be welded on the copper lining of the base, and supporting one section of the inner pipe to be welded by the two bases;
5) adjusting the welding gap between two sections of inner pipes to be welded;
6) a copper outer lining matched with the outer diameter of the inner pipe to be welded is arranged in the semicircular groove of the upper cover;
7) fixing the upper cover with the copper outer lining and the base through fastening bolts to clamp the inner pipe to be welded;
8) spot welding the two sections of fixed inner pipes to be welded, and then carrying out full-seam welding;
9) waiting for the weld joint to cool;
10) repeating the steps 4) to 9) to assemble and weld the third section of inner pipe to be welded;
11) and repeating the steps, assembling and welding the inner pipes to be welded section by section until the inner pipes to be welded are completely assembled and welded, cooling the welding seams and then removing the upper cover to complete the assembling and welding of the inner pipes of the stainless steel double-wall pipe for the marine low-speed diesel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957588.5A CN112222741A (en) | 2020-09-14 | 2020-09-14 | Pipe fitting welding tool and method for ensuring butt joint coaxiality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957588.5A CN112222741A (en) | 2020-09-14 | 2020-09-14 | Pipe fitting welding tool and method for ensuring butt joint coaxiality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112222741A true CN112222741A (en) | 2021-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010957588.5A Pending CN112222741A (en) | 2020-09-14 | 2020-09-14 | Pipe fitting welding tool and method for ensuring butt joint coaxiality |
Country Status (1)
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| CN (1) | CN112222741A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112743285A (en) * | 2021-02-18 | 2021-05-04 | 山西汾西重工有限责任公司 | Coaxiality positioning device |
| CN112958993A (en) * | 2021-03-10 | 2021-06-15 | 孙新灵 | Stainless steel pipe welding tool clamp |
| CN113146537A (en) * | 2021-04-23 | 2021-07-23 | 西安交通大学 | Combined installation tool structure and method for universal tolerance split crankshaft |
| CN113843573A (en) * | 2021-10-27 | 2021-12-28 | 沈阳航空航天大学 | Clamp for welding long pipe group |
| CN114289988A (en) * | 2021-12-15 | 2022-04-08 | 沪东中华造船(集团)有限公司 | Device for butt welding pipe joint and pipe and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112743285A (en) * | 2021-02-18 | 2021-05-04 | 山西汾西重工有限责任公司 | Coaxiality positioning device |
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| CN114289988A (en) * | 2021-12-15 | 2022-04-08 | 沪东中华造船(集团)有限公司 | Device for butt welding pipe joint and pipe and using method |
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Application publication date: 20210115 |