CN113664441A - Low-temperature wind tunnel inner connecting ring tailor-welding device and inner connecting ring tailor-welding method - Google Patents
Low-temperature wind tunnel inner connecting ring tailor-welding device and inner connecting ring tailor-welding method Download PDFInfo
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- CN113664441A CN113664441A CN202110987826.1A CN202110987826A CN113664441A CN 113664441 A CN113664441 A CN 113664441A CN 202110987826 A CN202110987826 A CN 202110987826A CN 113664441 A CN113664441 A CN 113664441A
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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
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
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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
- B23K33/004—Filling of continuous seams
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The application provides a splicing welding device and a splicing welding method for an inner connecting ring of a low-temperature wind tunnel, wherein an elliptic frame mold is of an elliptic annular twenty-quadrilateral structure and is used for being sleeved on the outer peripheral wall of the elliptic annular inner connecting ring; the elliptic frame is of an elliptic ring-shaped structure and is arranged at the central position in the inner cavity of the elliptic frame die, the central point of the elliptic frame is superposed with the central point of the elliptic frame die, the long axis of the elliptic frame is superposed with the long axis of the elliptic frame die, and the short axis of the elliptic frame is superposed with the short axis of the elliptic frame die; one end of the rigid support component is welded on the outer peripheral wall of the elliptical frame, and the other end of the rigid support component is abutted against two sides of each welding line on the inner-layer connecting ring; the fastening assembly is arranged in the middle of each group of edges in the oval frame die and used for fastening the inner-layer connecting ring. The device and the method effectively improve the assembling precision of the inner layer connecting ring and control the deformation in the welding process.
Description
Technical Field
The application relates to the field of wind tunnels, in particular to a splicing and welding device and a splicing and welding method for an inner-layer connecting ring of a low-temperature wind tunnel.
Background
Since the advent of wind tunnels, significant progress has been made in aerodynamic research and aircraft development using wind tunnel technology, and its effects have become more and more significant. However, with the increasing size of the test object (such as an aircraft), the conventional wind tunnel test faces some serious challenges, wherein the most important is that the conventional wind tunnel cannot be tested in the full-size reynolds number, the high-reynolds number wind tunnel test is the premise and guarantee for realizing the fine aerodynamic design and accurate flight performance prediction of the aircraft, and the low-temperature wind tunnel is developed for solving the problem. The low-temperature wind tunnel adopts a twenty-square heat insulation lining plate for internal heat insulation, and is simultaneously used as an internal flow passage to be installed inside the pressure-bearing shell. The corner section flow deflector needs to be welded and fixed, so a steel inner layer connecting ring is adopted to replace a twenty-square heat insulation lining plate, and the steel inner layer connecting ring and the pressure-bearing shell twenty-square heat insulation lining plate are lapped to form a low-temperature wind tunnel inner flow channel together. The inner connecting ring is arranged in the housing of the elliptic ring of the corner section, the structural form is an elliptic twenty-square shape, and the inner connecting ring is forbidden to be manufactured by adopting a bending process for ensuring the precision of a runner, because the bending part of the plate can generate a larger radian, and only twenty-four austenitic stainless steel part plates can be adopted for tailor-welding manufacture.
The austenitic stainless steel has low thermal conductivity and large thermal expansion coefficient, so that welding shrinkage and welding deformation are very large, and the dimensional precision and the profile precision of the inner-layer connecting ring can be influenced, so that the flow field quality of the inner flow channel is influenced.
Disclosure of Invention
An object of the present application is to provide a low-temperature wind tunnel inner layer connecting ring tailor-welding device and an inner layer connecting ring tailor-welding method, which aim to improve the problem of low manufacturing precision of the existing low-temperature wind tunnel inner layer connecting ring.
The technical scheme of the application is as follows:
a splicing welding device for an inner connecting ring of a low-temperature wind tunnel comprises an elliptical frame die, an elliptical frame, a rigid supporting assembly and a fastening assembly; the oval frame mold is of an oval annular twenty-quadrilateral structure and is used for being sleeved on the outer peripheral wall of the oval annular inner-layer connecting ring; the elliptic frame is of an elliptic ring-shaped structure and is arranged at the central position in the inner cavity of the elliptic frame die, the central point of the elliptic frame is coincided with the central point of the elliptic frame die, the long axis of the elliptic frame is coincided with the long axis of the elliptic frame die, and the short axis of the elliptic frame is coincided with the short axis of the elliptic frame die; one end of the rigid support component is welded on the outer peripheral wall of the elliptical frame, and the other end of the rigid support component is abutted against two sides of each welding seam on the inner-layer connecting ring; the fastening assembly is mounted in the middle of each group of edges in the oval frame mold and used for fastening the inner-layer connecting ring.
As a technical solution of the present application, the elliptical frame mold includes two half arc-shaped frame molds; the two semi-arc-shaped frame dies are symmetrical relative to the long axis of the oval frame die and are connected into an oval twenty-square structure; each semi-arc-shaped frame die comprises a first frame die, a second frame die, a third frame die and a fourth frame die which are the same in height as the inner layer connecting ring and are sequentially connected, the first frame die is the same as the fourth frame die, and the second frame die is the same as the third frame die.
As a technical solution of the present application, the first frame mold includes a first lower edge plate, a first middle edge plate, a first upper edge plate, four first rib plates, two first fastening plates, and two first reinforcing plates; the first lower edge-shaped plate, the first middle edge-shaped plate and the first upper edge-shaped plate are sequentially parallel from bottom to top and are distributed at equal intervals, the two top and bottom ends of the two first rib plates are respectively and vertically and fixedly connected between the two side ends of the first lower edge-shaped plate and the two side ends of the first middle edge-shaped plate, and the two top and bottom ends of the other two first rib plates are respectively and vertically and fixedly connected between the two side ends of the first middle edge-shaped plate and the two side ends of the first upper edge-shaped plate; the top and bottom ends of one first fastening plate are respectively and vertically fixedly connected between the first lower edge-shaped plate and the middle part of the first middle edge-shaped plate, and the top and bottom ends of the other first fastening plate are respectively and vertically fixedly connected between the first middle edge-shaped plate and the middle part of the first upper edge-shaped plate; the top and bottom ends of one first reinforcing plate are respectively and vertically fixedly connected between the middle parts of the first lower edge-shaped plate and the first middle edge-shaped plate, and the top and bottom ends of the other first reinforcing plate are respectively and vertically fixedly connected between the middle parts of the first middle edge-shaped plate and the first upper edge-shaped plate.
As a technical solution of the present application, the second frame mold includes a second lower edge plate, a second middle edge plate, a second upper edge plate, four second rib plates, two second fastening plates, and two second reinforcing plates; the second lower edge-shaped plate, the second middle edge-shaped plate and the second upper edge-shaped plate are sequentially distributed from bottom to top in parallel and at equal intervals, the two top and bottom ends of the two second rib plates are respectively and vertically and fixedly connected between the two side ends of the second lower edge-shaped plate and the two side ends of the second middle edge-shaped plate, and the two top and bottom ends of the other two second rib plates are respectively and vertically and fixedly connected between the two side ends of the second middle edge-shaped plate and the two side ends of the second upper edge-shaped plate; the top and bottom ends of one second fastening plate are respectively and vertically fixedly connected between the second lower edge plate and the middle part of the second middle edge plate, and the top and bottom ends of the other second fastening plate are respectively and vertically fixedly connected between the second middle edge plate and the middle part of the second upper edge plate; and the top and bottom ends of one second reinforcing plate are respectively and vertically fixedly connected between the middle parts of the second lower edge-shaped plate and the second middle edge-shaped plate, and the top and bottom ends of the other second reinforcing plate are respectively and vertically fixedly connected between the middle parts of the second middle edge-shaped plate and the second upper edge-shaped plate.
As a technical scheme of this application, the rigidity supporting component includes twenty four groups interval distribution's in proper order support bar, multiunit the one end of support bar weld in respectively at intervals on the periphery wall of oval frame, other end butt in the both sides department of every welding seam on the inner joint circle.
As a technical scheme of the application, each group of supporting bars comprises a transverse I-shaped steel, two vertical I-shaped steels and two corner plates; one end of the transverse I-shaped steel is vertically welded on the outer peripheral wall of the oval frame, and the top and the bottom of the other end of the transverse I-shaped steel are vertically welded on the middle parts of the two parallel and spaced vertical I-shaped steels through the corner plates respectively; the height of the two vertical I-shaped steels is the same as that of the inner-layer connecting ring, and the two vertical I-shaped steels are abutted against two sides of the same corresponding welding line on the inner-layer connecting ring in parallel; the bending angles of the two corner folding plates are the same as the bending angles of the corresponding positions on the inner connecting ring.
As a technical scheme of the application, the elliptical frame comprises an elliptical ring structure, a central plate and a plurality of support tubes, wherein the elliptical ring structure comprises an elliptical ring shell, two layers of inner ring ribs and a plurality of connecting rib plates; the elliptical ring shell is arranged at the center position in the inner cavity of the elliptical frame die, and one end of the rigid support assembly is welded on the outer peripheral wall of the elliptical ring shell; the two layers of inner ring ribs are welded on the inner circumferential wall of the elliptical ring shell in parallel at intervals along the height direction of the inner circumferential wall of the elliptical ring shell, and the two ends of the top and the bottom of the plurality of connecting rib plates are respectively and uniformly welded between the two layers of inner ring ribs at intervals; the central plate is arranged at the central position of the oval ring structure; and two ends of the supporting pipes are respectively and uniformly welded between the central plate and the elliptical ring shell at intervals.
As a technical scheme of the application, the fastening assembly comprises twenty-four groups of hook-shaped plates and limiting plates; the hook-shaped plate is fastened at the middle position of the top of each group of edges of the oval frame mold and used for fastening the inner-layer connecting ring; each limiting plate is welded at the middle position of the bottom of each group of edges of the oval frame die.
As a technical scheme of the application, the hook plate is of a U-shaped structure, one end of the hook plate is clamped at the outer profile of the middle position of the top of each group of edges of the oval frame mold, and the other end of the hook plate is used for attaching and fastening the inner layer connecting ring and the inner profile of the middle position of the top of each group of edges of the oval frame mold through a wedge; the limiting plate is L shape structure, and long limit welding in the intermediate position department of the bottom surface on every group limit of oval form frame mould, the terminal surface of minor face be on a parallel with interior profile of the intermediate position department of the bottom surface on every group limit of oval form frame mould, the terminal surface of the minor face of limiting plate with interval between the interior profile of the intermediate position department of the bottom surface on every group limit of oval form frame mould does the thickness of inlayer clamping ring.
The splicing welding method for the inner-layer connecting ring adopts the splicing welding device for the inner-layer connecting ring of the low-temperature wind tunnel to splice, and comprises the following steps:
step one, assembling the elliptic frame mold and the elliptic frame: welding twenty-four limiting plates in the fastening assembly to corresponding positions of the elliptical frame mold, clamping twenty-four austenitic stainless steel part plates of the inner-layer connecting ring between the limiting plates and the elliptical frame mold, and respectively attaching and fastening the twenty-four austenitic stainless steel part plates to the elliptical frame mold through twenty-four hook-shaped plates in the fastening assembly;
in the second step, the first step is that,and (3) performing tack welding connection on twenty-four austenitic stainless steel part plates of the inner-layer connecting ring: the grooves of twenty-four austenitic stainless steel part plates of the inner-layer connecting ring are designed to be asymmetric grooves, the inner wall surfaces of the austenitic stainless steel part plates are first grooves, the thickness of the first grooves is 1/5 of the plate thickness of the austenitic stainless steel part plates, and the groove angle theta of the first grooves239 to 40.5 degrees, wherein the outer wall surface of the austenitic stainless steel part plate is a second groove, the thickness of the second groove is 4/5 of the plate thickness of the austenitic stainless steel part plate, and the groove angle theta 1 of the second groove is 8 to 10 degrees; performing tack welding connection on twenty-four austenitic stainless steel part plates of the inner-layer connecting ring;
step three, deformation-preventing support is carried out: mounting twenty-four groups of support bars of the rigid support assembly between the inner connecting ring and the elliptical frame;
step four, welding the inner layer connecting ring: welding the first groove by argon tungsten-arc welding, welding the second groove into two layers, fully welding the first groove, and welding the second groove into two layers; polishing and removing the welding meat of the first groove by using an angle grinder, fully welding the first groove, and welding the second groove for two layers; polishing and removing the welding meat of the first groove by using an angle grinder, fully welding the first groove, and completing welding of the second groove; polishing and removing the welding flesh of the first groove by using an angle grinder, welding the first groove for two layers, and at the moment, welding the second layer of the first groove for two times, controlling a molten pool in the welding process to form an included angle between welding beads, wherein the included angle is the same as that between two adjacent austenitic stainless steel part plates of the inner-layer connecting ring;
step five, carrying out local correction on the inner layer connecting ring: after welding, cutting the inner connecting ring into a plurality of connecting blocks according to design requirements; if the bevel angle of each connecting block has deviation, performing point pressing on the welding seam of the connecting block by using a hydraulic machine, and locally correcting the bevel angle of each connecting block.
The beneficial effect of this application:
according to the splicing welding device and the splicing welding method for the inner connecting ring of the low-temperature wind tunnel, the size precision of the inner profile of the inner connecting ring is effectively controlled through the splicing welding device, simultaneous welding of twenty-four austenitic stainless steel part plates is achieved, manufacturing efficiency can be improved, and deformation in the welding process of the inner connecting ring can be prevented. Meanwhile, by designing a proper groove form and formulating a special welding process, the arc range of the welding seam of the inner-layer connecting ring can be effectively reduced, and the welding deformation of the inner-layer connecting ring can be effectively controlled, so that the flow field quality of the inner flow channel is ensured.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural view of a low-temperature wind tunnel inner-layer connecting ring tailor-welding device provided in an embodiment of the present application;
fig. 2 is a schematic view of an assembly structure of an elliptical frame mold and a fastening assembly according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a first frame mold according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a stopper structure provided in the embodiment of the present application;
fig. 5 is a schematic diagram of a hook plate structure provided in the embodiment of the present application;
fig. 6 is a schematic diagram illustrating an assembly of an elliptical frame and a rigid support assembly according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a groove design of an austenitic stainless steel component plate of an inner-layer connecting ring according to an embodiment of the present application.
Icon: 1-an elliptical frame mold; 2-an elliptical frame; 3-a rigid support assembly; 4-a fastening assembly; 5-inner layer connecting ring; 6-a first frame mold; 7-a second frame mold; 8-a third frame mold; 9-a fourth frame mold; 10-a first lower edge plate; 11-a first central edge panel; 12-a first upper edge plate; 13-transverse i-beam; 14-vertical i-beam; 15-folding corner plates; 16-an elliptical ring housing; 17-inner ring ribs; 18-connecting a rib plate; 19-centre plate; 20-supporting a tube; 21-hook plate; 22-a limiting plate; 23-austenitic stainless steel part plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Further, in the present application, unless expressly stated or limited otherwise, the first feature may be directly contacting the second feature or may be directly contacting the second feature, or the first and second features may be contacted with each other through another feature therebetween, not directly contacting the second feature. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
referring to fig. 1 and fig. 2 to 7, the present application provides a splicing and welding device for inner-layer connecting rings of a low-temperature wind tunnel, which is used for molding and welding the inner-layer connecting rings 5 of the low-temperature wind tunnel, so that the splicing precision of the inner-layer connecting rings 5 can be effectively ensured, and the deformation in the welding process can be controlled.
The assembling device mainly comprises an elliptical frame die 1, an elliptical frame 2, a rigid supporting component 3 and a fastening component 4; the oval frame mold 1 is of an oval annular twenty-square structure and is used for being sleeved on the outer peripheral wall of the oval annular inner-layer connecting ring 5, the structural inner molded surface of the oval frame mold is a working surface, and the size of the inner molded surface is the same as that of the outer wall surface of the inner-layer connecting ring 5 and is completely attached to the outer wall surface. Meanwhile, the elliptical frame 2 is of an elliptical ring-shaped structure and is arranged at the central position in the inner cavity of the elliptical frame die 1, the central point of the elliptical frame 2 is superposed with the central point of the elliptical frame die 1, the long axis of the elliptical frame 2 is superposed with the long axis of the elliptical frame die 1, and the short axis is superposed with the short axis of the elliptical frame die 1; meanwhile, one end of the rigid supporting component 3 is welded on the outer peripheral wall of the elliptical frame 2, and the other end of the rigid supporting component is abutted against two sides of each welding line on the inner-layer connecting ring 5; the fastening component 4 is arranged at the middle position of each group of edges in the oval frame die 1 and used for fastening the inner layer connecting ring 5.
Further, in the present embodiment, the elliptical frame mold 1 includes two half-arc-shaped frame molds, which are symmetrical with respect to the long axis of the elliptical frame mold 1 and are connected to form an elliptical twenty-square structure; each half-arc-shaped frame die comprises a first frame die 6, a second frame die 7, a third frame die 8 and a fourth frame die 9 which are the same in height as the inner-layer connecting ring 5 and are connected in sequence, the structures and the sizes of the first frame die 6 and the fourth frame die 9 are the same, the structures and the sizes of the second frame die 7 and the third frame die 8 are the same, the structural forms of the first frame die 6 and the second frame die 7 are the same, and the sizes of the first frame die and the second frame die are different.
Specifically, the first frame mold 6 includes a first lower edge plate 10, a first middle edge plate 11, a first upper edge plate 12, four first rib plates, two first fastening plates, and two first reinforcing plates; the first lower edge-shaped plate 10, the first middle edge-shaped plate 11 and the first upper edge-shaped plate 12 are sequentially parallel from bottom to top and are distributed at equal intervals, the two top and bottom ends of the two first rib plates are respectively and vertically and fixedly connected between the two side ends of the first lower edge-shaped plate 10 and the two side ends of the first middle edge-shaped plate 11, and the two top and bottom ends of the other two first rib plates are respectively and vertically and fixedly connected between the two side ends of the first middle edge-shaped plate 11 and the two side ends of the first upper edge-shaped plate 12; the two ends of the top and the bottom of one first fastening plate are respectively and vertically and fixedly connected between the middle parts of the first lower edge-shaped plate 10 and the first middle edge-shaped plate 11, and the two ends of the top and the bottom of the other first fastening plate are respectively and vertically and fixedly connected between the middle parts of the first middle edge-shaped plate 11 and the first upper edge-shaped plate 12; the top and bottom ends of one of the first reinforcing plates are respectively and vertically and fixedly connected between the middle parts of the first lower edge-shaped plate 10 and the first middle edge-shaped plate 11, and the top and bottom ends of the other first reinforcing plate are respectively and vertically and fixedly connected between the middle parts of the first middle edge-shaped plate 11 and the first upper edge-shaped plate 12. In addition, the structure and the size of the fourth frame mold 9 are identical to those of the first frame mold 6, and are not described herein again.
Meanwhile, the second frame mold 7 comprises a second lower edge plate, a second middle edge plate, a second upper edge plate, four second rib plates, two second fastening plates and two second reinforcing plates; the second lower edge-shaped plate, the second middle edge-shaped plate and the second upper edge-shaped plate are sequentially distributed from bottom to top in parallel and at equal intervals, the two top and bottom ends of the two second rib plates are respectively and vertically and fixedly connected between the two side ends of the second lower edge-shaped plate and the two side ends of the second middle edge-shaped plate, and the two top and bottom ends of the other two second rib plates are respectively and vertically and fixedly connected between the two side ends of the second middle edge-shaped plate and the two side ends of the second upper edge-shaped plate; the top and bottom ends of one second fastening plate are respectively and vertically fixedly connected between the middle parts of the second lower edge-shaped plate and the second middle edge-shaped plate, and the top and bottom ends of the other second fastening plate are respectively and vertically fixedly connected between the middle parts of the second middle edge-shaped plate and the second upper edge-shaped plate; the top and bottom ends of one second reinforcing plate are respectively and vertically fixedly connected between the middle parts of the second lower edge-shaped plate and the second middle edge-shaped plate, and the top and bottom ends of the other second reinforcing plate are respectively and vertically fixedly connected between the middle parts of the second middle edge-shaped plate and the second upper edge-shaped plate. In addition, the structure and the size of the third frame mold 8 are identical to those of the second frame mold 7, and are not described in detail herein.
It should be noted that, in this embodiment, bolt holes penetrating through opposite side walls of the first rib plate and the second rib plate are formed in both the first rib plate and the second rib plate, and the first frame mold 6 and the second frame mold 7 can be fixedly connected by inserting bolts into corresponding bolt holes in the adjacent first rib plate and second rib plate. The connection between the second frame mold 7 and the third frame mold 8, and the connection between the third frame mold 8 and the fourth frame mold 9 are also the same, and the description thereof is omitted. In addition, the elliptical frame mold 1 has a total of two first frame molds 6, two second frame molds 7, two third frame molds 8, and two fourth frame molds 9, which divide the elliptical frame mold 1 into eight parts. Further, since each first frame mold 6 is divided into three parts in the lateral direction by the first fastening plate, the first reinforcing plate, the elliptical frame mold 1 is divided into twenty-four parts in total in the lateral direction, so that it constitutes an elliptical ring-shaped twenty-quadrilateral structure.
The inner layer connecting ring 5 is also in a twenty-square structure with an elliptical ring structure, is externally connected to the inner peripheral wall of the elliptical frame die 1, and each edge of the inner layer connecting ring corresponds to each edge of the elliptical frame die 1 one by one. The inner layer connecting ring 5 is formed by sequentially encircling twenty-four austenitic stainless steel part plates 23 in an end-to-end manner through welding, and is provided with twenty-four welding seams which are vertically arranged, and each welding seam corresponds to the corner joint of two adjacent edges on the elliptic frame die 1.
Meanwhile, the rigid support component 3 comprises twenty-four groups of support bars distributed at intervals in sequence, one ends of the groups of support bars are welded on the outer peripheral wall of the elliptical frame 2 at intervals respectively, and the other ends of the groups of support bars are abutted to two sides of each welding line on the inner-layer connecting ring 5. In addition, each set of support bars corresponds to each weld on the inner connecting ring 5.
Specifically, in the present embodiment, each group of support bars includes a transverse i-beam 13, two vertical i-beams 14, and two corner plates 15; one end of the transverse I-shaped steel 13 is vertically welded to the outer peripheral wall of the oval frame 2, and the top and the bottom of the other end of the transverse I-shaped steel are respectively and vertically welded to the middle parts of the two parallel and spaced vertical I-shaped steels 14 through angle folding plates 15; the height of the two vertical I-shaped steels 14 is the same as that of the inner-layer connecting ring 5, the two vertical I-shaped steels are abutted against two sides of the same corresponding welding line on the inner-layer connecting ring 5 in parallel, and the vertical I-shaped steels 14 are parallel to the corresponding welding line on the inner-layer connecting ring 5; the bending angles of the two corner plates 15 are the same as the bending angles of the welding seams at the corresponding positions on the inner connecting ring 5.
It should be noted that the lengths of the vertical h-beams 14 are different, and the vertical h-beams are designed to be adaptive according to the intervals between the elliptical frame 2 and the elliptical frame mold 1 at different positions.
Further, in the present embodiment, the elliptical frame 2 comprises an elliptical ring structure, a central plate 19 and a plurality of support tubes 20, wherein the elliptical ring structure comprises an elliptical ring shell 16, two layers of inner ring ribs 17 and a plurality of connecting rib plates 18; wherein, the elliptical ring shell 16 is arranged at the central position in the inner cavity of the elliptical frame die 1, the long axis of the elliptical ring shell 16 is parallel to the long axis of the elliptical frame die 1, and the short axis is parallel to the short axis of the elliptical frame die 1; one end of the transverse I-shaped steel 13 is welded on the outer peripheral wall of the elliptical ring shell 16; the two inner ring ribs 17 are welded on the top and bottom positions of the inner circumferential wall of the elliptical ring shell 16 at intervals in parallel along the height direction of the inner circumferential wall of the elliptical ring shell 16, and the two ends of the top and bottom of the connecting rib plates 18 are respectively and uniformly welded between the two inner ring ribs 17 at intervals; the central plate 19 is arranged at the central position of the elliptical ring structure, and the center of the central plate 19 is the intersection point of the major axis and the minor axis of the elliptical frame 2; both ends of the support tubes 20 are welded at regular intervals between the center plate 19 and the elliptical ring housing 16.
Further, in the present embodiment, the fastening assembly 4 includes twenty-four sets of hook plates 21 and limiting plates 22, and each set of hook plate 21 and limiting plate 22 is disposed at the middle position of twenty-four sides on the elliptical frame model 1 corresponding to the hook plate 21 and the limiting plate 22. Specifically, the hook plate 21 is fastened at the middle position of the top of each edge on the oval frame die 1 for fastening the inner layer connecting ring 5; each stopper plate 22 is welded to the elliptical frame die 1 at an intermediate position of the bottom of each side.
Specifically, the hook plate 21 has a U-shaped structure, one end of the hook plate is clamped on the outer profile of the middle position of the top of each corresponding side on the elliptical frame die 1, and the other end of the hook plate attaches and fastens the inner layer connecting ring 5 to the inner profile of the middle position of the top of each corresponding side on the elliptical frame die 1 through a wedge.
The limiting plate 22 is of an L-shaped structure, the long side of the limiting plate is welded to the middle position of the bottom surface of each corresponding side on the elliptical frame die 1, and the end surface of the short side is parallel to the inner profile surface of the middle position of each corresponding side; meanwhile, the distance between the end surface of the short side of the limiting plate 22 and the inner profile surface at the middle position of each corresponding side is the thickness of the inner connecting ring 5.
In this embodiment, lattice columns or circular tubes may be disposed below the elliptical frame molds 1 and the elliptical frames 2, so as to raise the entire elliptical frame molds and the entire elliptical frames 2.
In addition, in the embodiment, a method for welding the inner-layer connecting ring is also provided, which mainly adopts the low-temperature wind tunnel inner-layer connecting ring welding device to weld the inner-layer connecting ring 5; the method mainly comprises the following steps:
step one, assembling an elliptical frame mold 1 and an elliptical frame 2: twenty-four limiting plates 22 in the fastening assembly 4 are welded at corresponding positions of the elliptical frame mold 1, twenty-four austenitic stainless steel part plates 23 of the inner connecting ring 5 are clamped between the limiting plates 22 and the elliptical frame mold 1, and the twenty-four austenitic stainless steel part plates 23 are respectively attached to and fastened with the elliptical frame mold 1 through the hook plates 21 in the twenty-four fastening assembly 4;
step two, performing tack welding connection on twenty-four austenitic stainless steel part plates 23 of the inner connecting ring 5: the grooves of the twenty-four austenitic stainless steel part plates 23 of the inner-layer connecting ring 5 are designed as asymmetric grooves, the inner wall surfaces of the austenitic stainless steel part plates 23 are first grooves, the thickness of the first grooves is 1/5 of the plate thickness of the austenitic stainless steel part plates 23, and the groove angle theta of the first grooves239 to 40.5 degrees, wherein the outer wall surface of the austenitic stainless steel part plate 23 is a second groove, the thickness of the second groove is 4/5 of the plate thickness of the austenitic stainless steel part plate 23, and the groove angle theta 1 of the second groove is 8 to 10 degrees; performing tack welding connection on twenty-four austenitic stainless steel part plates 23 of the inner-layer connecting ring 5;
step three, deformation-preventing support is carried out: twenty-four groups of support bars of the rigid support component 3 are arranged between the inner layer connecting ring 5 and the elliptical frame 2;
step four, welding the inner layer connecting ring 5: welding the first groove by argon tungsten-arc welding, welding the second groove into two layers, fully welding the first groove, and welding the second groove into two layers; polishing and removing the welding meat of the first groove by using an angle grinder, fully welding the first groove, and welding the second groove for two layers; polishing and removing the welding meat of the first groove by using an angle grinder, fully welding the first groove, and completing welding of the second groove; polishing and removing the welding flesh of the first groove by using an angle grinder, welding the first groove into two layers, and controlling a molten pool to form an included angle between welding beads in the welding process, wherein the included angle is the same as that between two adjacent austenitic stainless steel part plates 23 of the inner connecting ring 5;
step five, carrying out local correction on the inner layer connecting ring 5: after welding, cutting the inner connecting ring 5 into a plurality of connecting blocks according to design requirements; if the bevel angle of each connecting block has deviation, performing point pressing on the welding seam of the connecting block by using a hydraulic machine, and locally correcting the bevel angle of each connecting block.
In summary, according to the low-temperature wind tunnel inner connecting ring tailor-welding device and the inner connecting ring tailor-welding method, the inner profile size precision of the inner connecting ring 5 is effectively controlled through the tailor-welding device, the simultaneous welding of twenty-four austenitic stainless steel part plates 23 is realized, the manufacturing efficiency can be improved, and the deformation of the inner connecting ring 5 in the welding process can be prevented. Meanwhile, by designing a proper groove form and formulating a special welding process, the arc range of the welding seam of the inner connecting ring 5 can be effectively reduced, and the welding deformation of the inner connecting ring 5 can be effectively controlled, so that the flow field quality of the inner flow channel is ensured.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A splicing welding device for an inner connecting ring of a low-temperature wind tunnel is characterized by comprising an elliptical frame die, an elliptical frame, a rigid supporting assembly and a fastening assembly; the oval frame mold is of an oval annular twenty-quadrilateral structure and is used for being sleeved on the outer peripheral wall of the oval annular inner-layer connecting ring; the elliptic frame is of an elliptic ring-shaped structure and is arranged at the central position in the inner cavity of the elliptic frame die, the central point of the elliptic frame is coincided with the central point of the elliptic frame die, the long axis of the elliptic frame is coincided with the long axis of the elliptic frame die, and the short axis of the elliptic frame is coincided with the short axis of the elliptic frame die; one end of the rigid support component is welded on the outer peripheral wall of the elliptical frame, and the other end of the rigid support component is abutted against two sides of each welding seam on the inner-layer connecting ring; the fastening assembly is mounted in the middle of each group of edges in the oval frame mold and used for fastening the inner-layer connecting ring.
2. The splicing welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 1, wherein the elliptic frame die comprises two semi-arc frame dies; the two semi-arc-shaped frame dies are symmetrical relative to the long axis of the oval frame die and are connected into an oval twenty-square structure; each semi-arc-shaped frame die comprises a first frame die, a second frame die, a third frame die and a fourth frame die which are the same in height as the inner layer connecting ring and are sequentially connected, the first frame die is the same as the fourth frame die, and the second frame die is the same as the third frame die.
3. The splicing welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 2, wherein the first frame die comprises a first lower edge plate, a first middle edge plate, a first upper edge plate, four first rib plates, two first fastening plates and two first reinforcing plates; the first lower edge-shaped plate, the first middle edge-shaped plate and the first upper edge-shaped plate are sequentially parallel from bottom to top and are distributed at equal intervals, the two top and bottom ends of the two first rib plates are respectively and vertically and fixedly connected between the two side ends of the first lower edge-shaped plate and the two side ends of the first middle edge-shaped plate, and the two top and bottom ends of the other two first rib plates are respectively and vertically and fixedly connected between the two side ends of the first middle edge-shaped plate and the two side ends of the first upper edge-shaped plate; the top and bottom ends of one first fastening plate are respectively and vertically fixedly connected between the first lower edge-shaped plate and the middle part of the first middle edge-shaped plate, and the top and bottom ends of the other first fastening plate are respectively and vertically fixedly connected between the first middle edge-shaped plate and the middle part of the first upper edge-shaped plate; the top and bottom ends of one first reinforcing plate are respectively and vertically fixedly connected between the middle parts of the first lower edge-shaped plate and the first middle edge-shaped plate, and the top and bottom ends of the other first reinforcing plate are respectively and vertically fixedly connected between the middle parts of the first middle edge-shaped plate and the first upper edge-shaped plate.
4. The splicing welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 2, wherein the second frame die comprises a second lower edge plate, a second middle edge plate, a second upper edge plate, four second rib plates, two second fastening plates and two second reinforcing plates; the second lower edge-shaped plate, the second middle edge-shaped plate and the second upper edge-shaped plate are sequentially distributed from bottom to top in parallel and at equal intervals, the two top and bottom ends of the two second rib plates are respectively and vertically and fixedly connected between the two side ends of the second lower edge-shaped plate and the two side ends of the second middle edge-shaped plate, and the two top and bottom ends of the other two second rib plates are respectively and vertically and fixedly connected between the two side ends of the second middle edge-shaped plate and the two side ends of the second upper edge-shaped plate; the top and bottom ends of one second fastening plate are respectively and vertically fixedly connected between the second lower edge plate and the middle part of the second middle edge plate, and the top and bottom ends of the other second fastening plate are respectively and vertically fixedly connected between the second middle edge plate and the middle part of the second upper edge plate; and the top and bottom ends of one second reinforcing plate are respectively and vertically fixedly connected between the middle parts of the second lower edge-shaped plate and the second middle edge-shaped plate, and the top and bottom ends of the other second reinforcing plate are respectively and vertically fixedly connected between the middle parts of the second middle edge-shaped plate and the second upper edge-shaped plate.
5. The splicing welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 1, wherein the rigid supporting assembly comprises twenty-four groups of supporting bars which are sequentially distributed at intervals, one end of each group of supporting bars is welded on the outer peripheral wall of the oval frame at intervals, and the other end of each group of supporting bars abuts against two sides of each welding seam on the inner-layer connecting ring.
6. The splicing and welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 5, wherein each group of supporting bars comprises a transverse I-shaped steel, two vertical I-shaped steels and two angle plates; one end of the transverse I-shaped steel is vertically welded on the outer peripheral wall of the oval frame, and the top and the bottom of the other end of the transverse I-shaped steel are vertically welded on the middle parts of the two parallel and spaced vertical I-shaped steels through the corner plates respectively; the height of the two vertical I-shaped steels is the same as that of the inner-layer connecting ring, and the two vertical I-shaped steels are abutted against two sides of the same corresponding welding line on the inner-layer connecting ring in parallel; the bending angles of the two corner folding plates are the same as the bending angles of the corresponding positions on the inner connecting ring.
7. The splicing and welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 1, wherein the elliptical frame comprises an elliptical ring structure, a central plate and a plurality of supporting tubes, and the elliptical ring structure comprises an elliptical ring shell, two layers of inner ring ribs and a plurality of connecting rib plates; the elliptical ring shell is arranged at the center position in the inner cavity of the elliptical frame die, and one end of the rigid support assembly is welded on the outer peripheral wall of the elliptical ring shell; the two layers of inner ring ribs are welded on the inner circumferential wall of the elliptical ring shell in parallel at intervals along the height direction of the inner circumferential wall of the elliptical ring shell, and the two ends of the top and the bottom of the plurality of connecting rib plates are respectively and uniformly welded between the two layers of inner ring ribs at intervals; the central plate is arranged at the central position of the oval ring structure; and two ends of the supporting pipes are respectively and uniformly welded between the central plate and the elliptical ring shell at intervals.
8. The splicing welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 1, wherein the fastening assembly comprises twenty-four groups of hook-shaped plates and limiting plates; the hook-shaped plate is fastened at the middle position of the top of each group of edges of the oval frame mold and used for fastening the inner-layer connecting ring; each limiting plate is welded at the middle position of the bottom of each group of edges of the oval frame die.
9. The splicing and welding device for the inner-layer connecting ring of the low-temperature wind tunnel according to claim 8, wherein the hooking plate is of a U-shaped structure, one end of the hooking plate is clamped at the outer profile surface of the middle position of the top of each group of edges of the elliptical frame mold, and the other end of the hooking plate is used for splicing and fastening the inner-layer connecting ring and the inner profile surface of the middle position of the top of each group of edges of the elliptical frame mold through a wedge; the limiting plate is L shape structure, and long limit welding in the intermediate position department of the bottom surface on every group limit of oval form frame mould, the terminal surface of minor face be on a parallel with interior profile of the intermediate position department of the bottom surface on every group limit of oval form frame mould, the terminal surface of the minor face of limiting plate with interval between the interior profile of the intermediate position department of the bottom surface on every group limit of oval form frame mould does the thickness of inlayer clamping ring.
10. A splicing welding method for inner-layer connecting rings is assembled by adopting the splicing welding device for the inner-layer connecting rings of the low-temperature wind tunnel according to any one of claims 1 to 9, and is characterized by comprising the following steps of:
step one, assembling the elliptic frame mold and the elliptic frame: welding twenty-four limiting plates in the fastening assembly to corresponding positions of the elliptical frame mold, clamping twenty-four austenitic stainless steel part plates of the inner-layer connecting ring between the limiting plates and the elliptical frame mold, and respectively attaching and fastening the twenty-four austenitic stainless steel part plates to the elliptical frame mold through twenty-four hook-shaped plates in the fastening assembly;
step two, twenty-four austenitic stainless steel parts of the inner layer connecting ring are subjected to machiningThe plates are connected by spot welding: the grooves of twenty-four austenitic stainless steel part plates of the inner-layer connecting ring are designed to be asymmetric grooves, the inner wall surfaces of the austenitic stainless steel part plates are first grooves, the thickness of the first grooves is 1/5 of the plate thickness of the austenitic stainless steel part plates, and the groove angle theta of the first grooves239 to 40.5 degrees, wherein the outer wall surface of the austenitic stainless steel part plate is a second groove, the thickness of the second groove is 4/5 of the plate thickness of the austenitic stainless steel part plate, and the groove angle theta 1 of the second groove is 8 to 10 degrees; performing tack welding connection on twenty-four austenitic stainless steel part plates of the inner-layer connecting ring;
step three, deformation-preventing support is carried out: mounting twenty-four groups of support bars of the rigid support assembly between the inner connecting ring and the elliptical frame;
step four, welding the inner layer connecting ring: welding the first groove by argon tungsten-arc welding, welding the second groove into two layers, fully welding the first groove, and welding the second groove into two layers; polishing and removing the welding meat of the first groove by using an angle grinder, fully welding the first groove, and welding the second groove for two layers; polishing and removing the welding meat of the first groove by using an angle grinder, fully welding the first groove, and completing welding of the second groove; polishing and removing the welding flesh of the first groove by using an angle grinder, welding the first groove for two layers, and at the moment, welding the second layer of the first groove for two times, controlling a molten pool in the welding process to form an included angle between welding beads, wherein the included angle is the same as that between two adjacent austenitic stainless steel part plates of the inner-layer connecting ring;
step five, carrying out local correction on the inner layer connecting ring: after welding, cutting the inner connecting ring into a plurality of connecting blocks according to design requirements; if the bevel angle of each connecting block has deviation, performing point pressing on the welding seam of the connecting block by using a hydraulic machine, and locally correcting the bevel angle of each connecting block.
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