CN113305466A - Elbow splicing and welding method and internode positioning structure - Google Patents
Elbow splicing and welding method and internode positioning structure Download PDFInfo
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- CN113305466A CN113305466A CN202110734787.4A CN202110734787A CN113305466A CN 113305466 A CN113305466 A CN 113305466A CN 202110734787 A CN202110734787 A CN 202110734787A CN 113305466 A CN113305466 A CN 113305466A
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- straight pipes
- positioning
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- 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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a bent pipe splicing and welding method, which comprises the following steps: open slots are correspondingly arranged on the outer wall of the connecting end of two adjacent sections of straight pipes on the bent pipe; butting a plurality of straight pipes, and combining the open slots of two adjacent straight pipes into a complete positioning hole after butting the open slots; after two adjacent sections of straight pipes are clamped and positioned by using a clamp respectively, welding is carried out on a joint formed by butting the two adjacent sections of straight pipes so as to fixedly connect the two adjacent sections of straight pipes. The invention also discloses an internode positioning structure. The invention discloses a bent pipe splicing and welding method and an internode positioning structure, belongs to the technical field of bent pipe welding, and is used for quickly and accurately splicing and positioning two sections of straight pipes by arranging positioning holes.
Description
Technical Field
The invention relates to a bent pipe welding technology, in particular to a bent pipe assembling and welding method and an internode positioning structure.
Background
The assembly welding of the bent pipe is a common welding process, the means of the welding of the bent pipe is mainly divided into manual welding and automatic welding of equipment, the manual welding is suitable for small-batch production, and the automatic welding is suitable for large-batch production.
The first method is high in cost and high in positioning precision, and is not suitable for production requirements with urgent requirements and small order quantity, and the second method is low in cost and low in positioning precision and is not suitable for production requirements with certain position precision on bent pipes.
Aiming at the manual welding method of the multi-section bent pipe with the marking and auxiliary tool clamp, the method divides the multi-section bent pipe into a plurality of times of welding section by section, and the tool clamp plays a role in fixing two sections of straight pipes. Firstly, manually placing two straight pipes at correct positions, then marking positioning mark points between the sections of the two straight pipes by a mark pen to enable the mark points to be coated on the two straight pipes simultaneously, then fixing the two straight pipes by a simple tool fixture, keeping the mark points at the positions where the mark points are coated initially, and finally manually welding the two straight pipes into a bent pipe with a certain angle. For the welding bent pipe composed of multiple sections of straight pipes, the process is repeated, and the assembling and welding of the multiple sections of bent pipes can be realized. The method has the advantages that only two sections of fixed tool fixtures of the straight pipes need to be manufactured, the tool fixtures are simple in structure and low in cost, the production requirements of flexible orders are met, and the method has the defects that the accuracy of positioning through the marking points is low, the accumulated error is easy to cause overlarge, and the final product is unqualified.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems of the prior art, and an object of the present invention is to provide a method for assembling and welding a bent pipe.
The second objective of the present invention is to provide an internode positioning structure.
In order to achieve the first purpose, the invention provides a bent pipe splicing and welding method, which comprises the following steps: open slots are correspondingly arranged on the outer wall of the connecting end of two adjacent sections of straight pipes on the bent pipe; butting a plurality of straight pipes, and combining the open slots of two adjacent straight pipes into a complete positioning hole after butting the open slots; after two adjacent sections of straight pipes are clamped and positioned by using a clamp respectively, welding is carried out on a joint formed by butting the two adjacent sections of straight pipes so as to fixedly connect the two adjacent sections of straight pipes.
Furthermore, the connecting end of two adjacent straight pipes is provided with a butt-joint end face, an open slot on the outer wall of each straight pipe extends to the butt-joint end face along the axial direction, the open shapes of the open slots on the two adjacent straight pipes are the same, sharp corners are arranged on two sides of a notch of each open slot, and the alignment of the two sharp corners on the two sides of each open slot can ensure that two points of the two adjacent straight pipes are aligned at the internode.
Furthermore, when the two adjacent straight pipes are clamped and positioned, a surface formed by the central lines of the two straight pipes is used as a welding positioning surface, and a clamp is used in the welding process to clamp the outer walls of the two adjacent straight pipes by taking a surface parallel to the welding positioning surface as an actual positioning surface.
Furthermore, when the open grooves in two adjacent straight pipes are machined, the two straight pipes are spliced through butt end faces, then the two straight pipes are horizontally placed on the same supporting plane, the supporting plane is parallel to the welding positioning surfaces of the two straight pipes, the two straight pipes are clamped tightly by using a fixture tool, then the open grooves are machined on the top surfaces of the two straight pipes, and the extending direction of the open grooves is parallel to the axial direction of the corresponding straight pipes.
Furthermore, a support plane parallel to the welding positioning plane is used as an actual positioning plane, after the butt joint end faces of the two straight pipes are aligned, the two straight pipes are horizontally placed on the same support plane, then open grooves of the two straight pipes are butted to obtain a complete positioning hole, two points are aligned, and accurate positioning of the two straight pipes is achieved through alignment of one plane and the two points.
In order to achieve the second purpose, the invention further provides an internode positioning structure for achieving the elbow splicing and welding method, which comprises a plurality of sections of straight pipes capable of being spliced into an elbow, an internode is arranged between every two adjacent straight pipes, the internode is a connection boundary line of the two sections of straight pipes after being butted, a positioning hole is arranged at the internode between every two adjacent straight pipes, the positioning hole comprises an open slot and a sharp corner, the open slot is arranged on the outer wall of the internode between the two sections of straight pipes, and the sharp corner is positioned at two sides of a notch of the open slot.
Furthermore, the positioning hole is formed by butting open grooves on the outer walls of two adjacent sections of straight pipes, and the opening shapes of the open grooves of the two adjacent sections of straight pipes are the same.
Furthermore, the coplanarity of the axes of the two adjacent straight pipes is set as a welding positioning surface, the bottom surfaces of two open grooves of the positioning hole are positioned on a plane parallel to the welding positioning surface, and the projection line sections of the side lines of the two sides of the open grooves parallel to the axes of the straight pipes on the welding positioning surface are symmetrically distributed relative to the corresponding axes of the straight pipes.
Furthermore, the adjacent two sections of straight pipes are provided with positioning blocks matched with the positioning holes, the two ends of each positioning block are provided with pull blocks, the inner ends of the open grooves of the two sections of straight pipes are provided with clamping grooves matched with the pull blocks, the clamping grooves are triangular, and the pull blocks are triangular structures.
Advantageous effects
Compared with the prior art, the bent pipe splicing and welding method and the internode positioning structure have the following beneficial effects: according to the elbow splicing and welding method and the internode positioning structure, the positioning holes are arranged to splice and position the two sections of straight pipes quickly and accurately, the elbow splicing and welding method and the internode positioning structure have the advantages of high positioning accuracy, simple tool and fixture, low process cost and the like, are suitable for order production with less demand and urgent demand, and provide a high-accuracy and low-cost welding method for the elbow splicing and welding process.
Drawings
FIG. 1 is a schematic structural view of the assembly welding of the elbow pipe of the present invention;
FIG. 2 is a sectional view of a top view structure of two adjacent straight pipes assembled and welded according to the present invention;
FIG. 3 is a top view of the structure of two adjacent straight pipes assembled and welded in the present invention;
FIG. 4 is a sectional view of the structure taken along the line B-B in FIG. 3;
FIG. 5 is an enlarged schematic view of the structure at A in FIG. 4;
FIG. 6 is an enlarged view of the positioning block and the pulling block of the present invention.
In the figure: 1. a straight pipe; 2. an open slot; 3. positioning holes; 4. internode; 5. welding a positioning surface; 6. sharp corners; 7. positioning blocks; 8. pulling the block; 9. a clamping groove.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
The specific embodiments of the present invention are such that: as shown in fig. 1-6, a method for assembling and welding a bent pipe includes the following steps: an open slot 2 is correspondingly arranged on the outer wall of the connecting end of two adjacent sections of straight pipes 1 on the bent pipe; butting a plurality of straight pipes 1, and combining the open grooves 2 of two adjacent straight pipes 1 into a complete positioning hole 3 after butting; after two adjacent sections of straight pipes 1 are clamped and positioned by using a clamp respectively, welding is carried out on a joint space 4 formed by butting the two adjacent sections of straight pipes 1 so as to fixedly connect the two adjacent sections of straight pipes, and the positioning process of the two adjacent sections of straight pipes 1 is repeated, so that other sections of straight pipes 1 can be spliced and welded together.
In this embodiment, the connecting end of two adjacent straight pipes 1 is provided with a butt end face, the open slot 2 on the outer wall of each straight pipe 1 extends to the butt end face along the axial direction, the open shapes of the open slots 2 on the two adjacent straight pipes 1 are the same, two sides of the notch of the open slot 2 are provided with sharp corners 6, and aligning the sharp corners 6 on the two sides of the two open slots 2 can ensure that two points of the two straight pipes 1 are aligned at the internode 4.
In this embodiment, when two adjacent straight pipes 1 are clamped and positioned, a plane formed by the center lines of the two straight pipes 1 is used as a welding positioning plane, and a clamp is used in the welding process to clamp the outer walls of the two adjacent straight pipes 1 by using a plane parallel to the welding positioning plane as an actual positioning plane.
In this embodiment, when the open slot 2 on two adjacent straight pipes 1 is processed, after the two straight pipes 1 are spliced by butt joint end faces, the two straight pipes 1 are horizontally placed on the same supporting plane, the supporting plane is parallel to the welding positioning face 5 of the two straight pipes 1, the two straight pipes 1 are clamped by using a fixture tool, then the open slot 2 is processed on the top face of the two straight pipes 1, and the extending direction of the open slot 2 is parallel to the axial direction of the corresponding straight pipe 1.
An open slot 2 is processed on the top surfaces of two sections of straight tubes 1 through a milling machine, the top surfaces of two adjacent sections of straight tubes 1 are actual positioning surfaces parallel to welding positioning surfaces of the two sections of straight tubes 1, the bottom surface of the open slot 2 is parallel to the welding positioning surfaces, and the slot walls on two sides of the open slot 2 are perpendicular to the welding positioning surfaces 5. The feed track of the milling cutter on the milling machine spindle is parallel to the axes of the two straight pipes 1.
In the embodiment, a support plane parallel to the welding positioning plane 5 is used as an actual positioning plane, after butt joint end faces of two straight pipes 1 are aligned, the two straight pipes 1 are horizontally placed on the same support plane, then open grooves 2 of the two straight pipes 1 are butt jointed to obtain a complete positioning hole 3, two points are aligned, and accurate positioning of the two straight pipes 1 is realized through alignment of one plane and the two points.
In the bent pipe assembling and welding method, the positioning hole 3 is arranged between the two adjacent straight pipes 1, the open groove 2 with the same direction can be machined on the two straight pipes 1 by using the same positioning surface, the machining positioning surface is parallel to the set welding positioning surface 5, and the welding positioning surface 5 is perpendicular to the butt joint end surface of the two straight pipes 1, so that the actual machining positioning surface is easy to select, and the bent pipe assembling and welding method has the advantages that the installation and positioning of the open groove 2 are facilitated, and the machined notch is more accurate.
The welding method is suitable for manual assembly welding, is complementary with the positioning hole 3, and divides the assembly welding of the multi-section bent pipe into multiple times of section-by-section welding, firstly takes a supporting positioning surface parallel to a welding positioning surface 5 as a positioning surface, particularly aligns the butt joint end surfaces of two straight pipes 1, horizontally places the two straight pipes 1 on the same supporting plane, then adopts two open slots 2 of the positioning hole 3 to carry out two-point alignment, and realizes the accurate positioning of the two straight pipes 1 through aligning one plane and the two points.
An internode positioning structure for realizing the elbow splicing and welding method comprises a plurality of sections of straight pipes 1 which can be spliced into an elbow, an internode 4 is arranged between every two adjacent straight pipes 1, the internode 4 is a connection boundary line after the two sections of straight pipes 1 are butted, a positioning hole 3 is arranged at the internode 4 between every two adjacent sections of straight pipes 1, the positioning hole 3 comprises an open slot 2 and a sharp corner 6, the open slot 2 is arranged on the outer wall at the internode 4 between the two sections of straight pipes 1, and the sharp corner 6 is positioned at two sides of a notch of the open slot 2. The coplanar of the axes of the two adjacent straight pipes 1 is set as a welding positioning surface 5 which is a plane in which theory exists.
In this internode location structure, when splicing and locating two adjacent sections of straight pipes 1, locate through the locating hole 3 of internode 4 department, firstly adopt the supporting plane that is on a parallel with welding position face 5 to carry out the coarse positioning to straight pipe 1, secondly adopt locating hole 3 to carry out the essence location to two straight pipes 1, then adopt simple and easy frock clamp with the rigidity of straight pipe, at last realize the welding of assembling of two sections of straight pipes 1 in internode 4 department.
In the embodiment, the positioning hole 3 is formed by butting open grooves 2 on the outer walls of two adjacent sections of straight pipes 1, and the opening shapes of the open grooves 2 of the two adjacent sections of straight pipes 1 are the same.
After the closed angles of the open grooves 2 of two adjacent straight pipes 1 are aligned, two points at the internode of the straight pipes are always ensured to be aligned.
In this embodiment, the coplanar of the axes of two adjacent straight pipes 1 is set as a welding positioning surface 5, the welding positioning surface 5 is a theoretically existing plane, the bottom surfaces of two open grooves 2 of the positioning hole 3 are located on a plane parallel to the welding positioning surface 5, and the projection line sections of the two side lines of the open grooves 2 parallel to the axes of the straight pipes 1 on the welding positioning surface 5 are symmetrically distributed relative to the corresponding axes of the straight pipes 1.
In the embodiment, two adjacent sections of the straight pipes 1 are provided with positioning blocks 7 matched with the positioning holes 3, two ends of each positioning block 7 are provided with pulling blocks 8, the inner ends of the open grooves 2 of the two sections of the straight pipes 1 are provided with clamping grooves 9 matched with the pulling blocks 8, the clamping grooves 9 are triangular, and the pulling blocks 8 are triangular structures. The two straight pipes 1 can be axially limited through the pulling blocks 8 at the two ends of the positioning block 7, and the two straight pipes 1 are initially fixed.
When two adjacent sections of straight pipes 1 are spliced, the positioning hole 3 is formed between the two adjacent sections of straight pipes 1, the open groove 2 with the same direction can be machined on the two sections of straight pipes 1 by using the same positioning surface, the machined positioning surface is parallel to the set welding positioning surface 5, and the end face of the butt joint of the welding positioning surface 5 and the two sections of straight pipes 1 is perpendicular, so that the actually machined positioning surface is easy to select, the installation and positioning of the open groove 2 are facilitated, and the machined notch is more accurate.
The internode positioning structure is suitable for manual assembly welding, the assembly welding of a plurality of sections of bent pipes is split into multiple times of welding section by assembling through a positioning hole 3 structure at the position of an internode 4, firstly, a supporting positioning surface parallel to a welding positioning surface 5 is taken as a positioning surface, specifically, after butt joint end surfaces of two straight pipes 1 are aligned, the two straight pipes 1 are horizontally placed on the same supporting plane, then two open grooves 2 of the positioning hole 3 are adopted for two-point alignment, and the accurate positioning of the two straight pipes 1 is realized through alignment of one plane and the two points.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (9)
1. The assembling and welding method for the bent pipe is characterized by comprising the following steps of: an open slot (2) is correspondingly arranged on the outer wall of the connecting end of two adjacent sections of straight pipes (1) on the bent pipe; butting a plurality of straight pipes (1) to enable open grooves (2) of two adjacent sections of straight pipes (1) to be butted and then combined into a complete positioning hole (3); after two adjacent sections of straight pipes (1) are clamped and positioned by using a clamp respectively, welding is carried out on a joint space (4) formed by butting the two adjacent sections of straight pipes so as to fixedly connect the two adjacent sections of straight pipes.
2. The assembly welding method for the bent pipe according to claim 1, wherein butt joint end faces are arranged at the connecting ends of two adjacent straight pipes (1), an open slot (2) in the outer wall of each straight pipe (1) extends to the butt joint end faces along the axial direction of the open slot, the open slots (2) in the two adjacent straight pipes (1) are identical in shape, sharp corners 6 are arranged on two sides of a notch of each open slot (2), and the alignment of the sharp corners 6 on two sides of each open slot (2) can ensure that two points of the two adjacent straight pipes (1) are aligned at a joint (4).
3. The assembling and welding method for the bent pipe according to claim 2, characterized in that when two adjacent sections of the straight pipes (1) are clamped and positioned, a surface formed by the center lines of the two sections of the straight pipes (1) is used as a welding positioning surface (5), and a clamp is used in the welding process to clamp the outer walls of the two adjacent sections of the straight pipes (1) by taking a surface parallel to the welding positioning surface (5) as an actual positioning surface.
4. The assembling and welding method for the bent pipe according to claim 3, characterized in that when the open grooves (2) of two adjacent straight pipes (1) are processed, the two straight pipes (1) are spliced through butt end faces, then the two straight pipes (1) are horizontally placed on the same supporting plane, the supporting plane is parallel to the welding positioning surfaces (5) of the two straight pipes (1), the two straight pipes (1) are clamped by using a fixture tool, then the open grooves (2) are processed on the top surfaces of the two straight pipes (1), and the extending direction of the open grooves (2) is parallel to the axial direction of the corresponding straight pipe (1).
5. The assembly welding method for the bent pipe according to claim 4, characterized in that a support plane parallel to the welding positioning surface (5) is used as an actual positioning surface, the butt joint end surfaces of the two straight pipes (1) are aligned, the two straight pipes (1) are horizontally placed on the same support plane, then the open grooves (2) of the two straight pipes (1) are butted to obtain a complete positioning hole (3), two points are aligned, and the two straight pipes (1) are accurately positioned by aligning one plane and the two points.
6. The utility model provides an realize that welding method is assembled to return bend of claim 1's internode location structure, characterized in that, including can splice into the multistage straight tube (1) of return bend, adjacent two be equipped with internode (4) between straight tube (1), internode (4) are the boundary line of connection after two sections straight tube (1) docks, adjacent two sections internode (4) department between straight tube (1) is provided with locating hole (3), locating hole (3) include open slot (2) and closed angle (6), open slot (2) set up on the outer wall of two sections straight tube (1) internode (4) departments, closed angle (6) are located the notch both sides of open slot (2).
7. An internode positioning structure according to claim 6, characterized in that the positioning holes (3) are formed by butt-jointing the open grooves (2) on the outer walls of two adjacent sections of straight pipes (1), and the open shapes of the open grooves (2) of two adjacent sections of straight pipes (1) are the same.
8. An internode positioning structure according to claim 7, wherein the coplanar of the axes of two adjacent straight pipes (1) is set as a welding positioning surface (5), the bottom surfaces of two open grooves (2) of the positioning hole (3) are on a plane parallel to the welding positioning surface, and the projection line segments of the two side lines of the open grooves (2) parallel to the axes of the straight pipes (1) on the welding positioning surface are symmetrically distributed relative to the axes of the corresponding straight pipes (1).
9. An internode positioning structure according to claim 8, wherein two adjacent sections of the straight pipes (1) are provided with positioning blocks (7) matched with the positioning holes (3), two ends of each positioning block (7) are provided with pulling blocks (8), the inner ends of the open grooves (2) of the two sections of the straight pipes (1) are provided with clamping grooves (9) matched with the pulling blocks (8), the clamping grooves (9) are triangular, and the pulling blocks (8) are triangular structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110734787.4A CN113305466A (en) | 2021-06-30 | 2021-06-30 | Elbow splicing and welding method and internode positioning structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110734787.4A CN113305466A (en) | 2021-06-30 | 2021-06-30 | Elbow splicing and welding method and internode positioning structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113305466A true CN113305466A (en) | 2021-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110734787.4A Pending CN113305466A (en) | 2021-06-30 | 2021-06-30 | Elbow splicing and welding method and internode positioning structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113305466A (en) |
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2021
- 2021-06-30 CN CN202110734787.4A patent/CN113305466A/en active Pending
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