Arc-shaped triangular gate welding tool

Abstract

The invention relates to the technical field of welding tools, and particularly provides an arc-shaped triangular gate welding tool. Comprising a tool table, two lateral movement assemblies, a pressing plate assembly, two pressing frame assemblies and two limiting mechanisms. The tool table is provided with an anti-deformation face used for supporting the arc-shaped flashboard in an attached mode, and the curvature of the anti-deformation face is The two lateral movement assemblies are symmetrically distributed on the two sides of the reversible deformation face. The pressing plate assembly comprises two pressing plate mechanisms which can be correspondingly pressed at the positions, close to the side edges of the two axial ends, of the arc-shaped gate plate; the pressing plate mechanism comprises a plurality of pressing plate pieces capable of pressing in the arc direction of the arc-shaped gate plate. Two edge pressing pieces capable of being correspondingly pressed at the positions, close to the side edges of the two ends of the arc line, of the arc-shaped gate plate are horizontally installed between the two plate pressing mechanisms in a sliding mode. According to the welding tool provided by the invention, the welding deformation of the arc-shaped flashboard is controlled by adopting multiple modes such as reverse pre-deformation, synchronous gradient release of pressing constraint force along with gradual welding, inward shrinkage deformation limiting and the like, the internal stress is reduced, and the overall welding quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding tooling, and specifically provides an arc-shaped triangular gate welding tooling. BACKGROUND

[0002] The arc-shaped triangular gate is used for controlling fluid on-off, and is composed of a triangular steel frame similar to a triangular shape and an arc-shaped gate plate welded with the triangular steel frame. The arc-shaped gate plate serves as a sealing surface, and the triangular steel frame is arranged to rotate by a rotating shaft and is used to drive the arc-shaped gate plate to rotate around the shaft, so as to control fluid on-off. Since the triangular steel frame and the arc-shaped gate plate are fixed by welding, and are affected by thermal expansion and cold contraction during the welding process, the arc-shaped gate plate will shrink and deform after cooling. The deformed arc-shaped gate plate will affect the sealing performance of the actual assembly and use. Therefore, controlling and reducing deformation is an important target for improving the welding quality.

[0003] In the prior art, when the triangular steel frame and the arc-shaped gate plate are welded, a welding clamp is usually used for positioning and clamping, and the welding deformation is inhibited to a certain extent. In the actual welding process, if the arc-shaped gate plate is loosened and clamped before the welding is completed and the arc-shaped gate plate is completely cooled, the arc-shaped gate plate will shrink and deform as a whole. However, the welding positions have a sequence, so that the cooling shrinkage of different positions is uneven, which affects the sealing effect of the actual use of the triangular gate. In addition, the positions welded first cool down in advance, which accumulates more internal stress, so that the internal stress of the triangular gate is unevenly distributed. If the welding is completed and the pressure is continuously maintained until the arc-shaped gate plate is completely cooled, although the deformation can be controlled to the maximum extent and the sealing performance of the actual use of the whole is improved, the continuous rigid clamping constraint will convert the cooling shrinkage into internal stress accumulation. The large amount of accumulated internal stress will damage the stability and reliability of the arc-shaped triangular gate structure, and affect the structural strength and service life. SUMMARY

[0004] In order to solve the above problems, the present application provides an arc-shaped triangular gate welding tooling for solving the problems mentioned in the background art.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: A kind of arc triangular gate welding tool, for the welding between the triangular truss of triangular gate and arc gate plate is positioned and clamped, including tool table, two side shift assemblies, pressing plate assembly, two pressing frame components and two limiting mechanisms;Tool table is equipped with for the reverse deformation surface of being used to adhere to support arc gate plate and curvature less than arc gate plate;Two side shift assemblies are symmetrically distributed on the two sides of reverse deformation surface;Side shift assembly includes stroke frame moving along the axial direction of reverse deformation surface;Pressing plate assembly includes two pressing plate mechanisms corresponding assembled on two stroke frames and can be correspondingly pressed on arc gate plate near the axial two end side edge position;Pressing plate mechanism includes multiple pressing plate pieces that can be pressed in the arc line direction of arc gate plate;When welding symmetrically from the center axis of arc gate plate to the two ends of arc line in sequence, the pressing force of pressing plate piece distributed from near to far relative to the center axis of arc gate plate in horizontal direction can be reduced by gradient from big to small;Two pressing plate mechanisms are horizontally slidably installed with two edge pressing pieces that can be correspondingly pressed on arc gate plate near the two ends of arc line;Two pressing frame components are corresponding assembled on two stroke frames, and are commonly used to press the triangular truss on arc gate plate;Two limiting mechanisms are correspondingly arranged adjacent to two edge pressing pieces, for limiting the amplitude of arc gate plate cooling contraction after welding.

[0006] Preferably, the pressing plate mechanism further includes a circular arc guide plate arranged in a lifting manner and having a notch facing upward, the plurality of pressing plate pieces are distributed in a circumferential direction of the circular arc guide plate and are slidably installed on the circular arc guide plate in a radial direction, the circular arc guide plate is provided with a releasing mechanism, the plurality of pressing plate pieces are horizontally symmetrically distributed about a circular arc center axis of the circular arc guide plate, and two groups of pressing plate pieces distributed on two sides of the circular arc center axis of the circular arc guide plate are respectively connected to the releasing mechanism; under the driving of the releasing assembly, the pressing force of the pressing plate pieces distributed from near to far relative to the circular arc center axis of the circular arc guide plate in a horizontal direction can be reduced by gradient from big to small.

[0007] Preferably, the tool table is provided with a support mold, and the reverse deformation surface is arranged on the support mold; a cavity structure is formed at a bottom end of the tool table at a position where the support mold is located, a plurality of buffer pieces are fixed in the cavity of the tool table and are distributed in an arc line direction of the reverse deformation surface, and the buffer pieces are provided with support ends penetrating through the reverse deformation surface and used for elastically supporting the arc gate plate.

[0008] Preferably, the pressing plate piece includes a guide shaft slidably installed on the circular arc guide plate in a radial direction, a roller seat block is fixed to a bottom end of the guide shaft, a sliding sleeve block is slidably sleeved on the guide shaft, a plurality of pressure disc springs are sleeved on the guide shaft, the plurality of pressure disc springs are located between the sliding sleeve block and the roller seat block, and a plurality of main pressure rollers are rotatably installed on the roller seat block; the pressing plate piece is connected to the releasing assembly through the sliding sleeve block.

[0009] Preferably, the releasing assembly comprises two horizontally symmetrical arranged arc-shaped plates, two arc-shaped plates are correspondingly arranged with two groups of pressing plate members distributed on both sides of the center axis of the circular arc guide plate, an arc-shaped hole extending along the arc of the arc-shaped plate is formed on the arc-shaped plate, a pin shaft is fixed on the sliding sleeve block, the pin shafts distributed on the same side of the center axis of the circular arc guide plate of the plurality of pressing plate members are arranged in the arc-shaped hole of the corresponding arc-shaped plate; the ends of the two arc-shaped plates away from each other are hinged to the circular arc guide plate, the ends of the two arc-shaped plates close to each other are hinged to a first connecting rod, a vertical driving member is fixed on the circular arc guide plate, and the other ends of the two first connecting rods are hinged to the driving end of the vertical driving member.

[0010] Preferably, the two pressing plate mechanisms are assembled with the edge pressing member between the two pressing plate members distributed on the same side of the center axis of the circular arc of the circular arc guide plate and horizontally farthest from the center axis of the circular arc; the edge pressing member comprises a sub-roller seat horizontally slidingly installed between the two roller seat blocks, and a plurality of sub-pressing rollers are horizontally rotatably installed on the sub-roller seat.

[0011] Preferably, the pressing frame assembly comprises an insertion rod seat vertically slidingly installed on the stroke frame and an insertion rod horizontally fixed on the insertion rod seat, the insertion rod is arranged in parallel with the center axis of the reverse deformation surface, the insertion rod is used for being inserted into the rotating shaft hole of the triangular truss, and a stepped end face is arranged on the insertion rod and clamped with the outer end face of the rotating shaft hole of the triangular truss.

[0012] Preferably, a plurality of axial holes corresponding to the plurality of buffer members are formed on the reverse deformation surface, and the axial holes extend along the axial direction of the reverse deformation surface; the buffer member comprises a guide seat fixed on the inner end face of the cavity of the tooling table, a supporting strip is slidingly and fitly installed on the guide seat along the radial direction of the reverse deformation surface, the supporting strip passes through the corresponding axial hole, a plurality of guide rods slidingly fit with the guide seat are fixed on the supporting strip, a plurality of material supporting disc springs are sleeved on the guide rods, and the plurality of material supporting disc springs are located between the supporting strip and the guide seat.

[0013] Preferably, when the driving end of the vertical driving member is at the lowest height, the circular arc center points of the two arc-shaped plates coincide with the center axis of the circular arc of the circular arc guide plate.

[0014] The technical scheme has the following advantages or beneficial effects: the arc-shaped triangular gate welding tool provided by the application is provided with a support mold matched with the arc-shaped gate plate, the arc-shaped gate plate can be tightly pressed on the reverse deformation surface of the support mold by the pressing frame composed of two pressing plate mechanisms and two pressing pieces in the pressing plate assembly, the arc-shaped gate plate is reversely pre-deformed relative to the inward retraction direction, the release assembly for actively releasing the pressing constraint force is arranged in the pressing plate mechanism, so that the pressing contact points of the arc-shaped gate plate can be actively and synchronously released by the release assembly in the welding process, the influence of uneven cooling and shrinkage of different parts of the arc-shaped gate plate caused by the welding in sequence is reduced, the uniformity of the inward retraction deformation of the arc-shaped gate plate is improved, the generation and accumulation of internal stress are reduced, on the basis of the reverse pre-deformation, the automatic compensation is realized by the inward retraction deformation after the welding of the arc-shaped gate plate, and the arc-shaped gate plate can be restored to the initial structure state after deformation by the limitation of the shrinkage deformation position determined according to the initial shape state of the arc-shaped gate plate. In summary, the welding tool can position and clamp the welding between the triangular truss and the arc-shaped gate plate in the arc-shaped triangular gate, control the welding deformation of the arc-shaped gate plate by means of reverse pre-deformation, synchronous gradient release of the pressing constraint force with gradual welding, inward retraction deformation limiting and other ways, reduce the internal stress, and improve the overall quality of the welding. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application and its features, shapes and advantages will become more apparent upon reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference numbers in all the drawings indicate the same parts, and the drawings are not necessarily drawn to scale, with emphasis being placed on illustrating the principles of the application.

[0016] Figure 1 is a perspective view of an arc-shaped triangular gate welding tool provided by the application.

[0017] Figure 2 is a perspective view of an arc-shaped triangular gate welding tool provided by the application.

[0018] Figure 3 is a top view of the working state of an arc-shaped triangular gate welding tool provided by the application.

[0019] Figure 4 is Figure 3 is a sectional view of A-A in the above-mentioned arc-shaped triangular gate welding tool.

[0020] Figure 5 is a perspective view of the tool table.

[0021] Figure 6 is a perspective view of the arc-shaped triangular gate welding tool.

[0022] Figure 7 is a perspective view of the assembly of the pressing plate mechanism and the stroke frame.

[0023] Figure 8 is the perspective view of the pressing plate mechanism.

[0024] Figure 9 is the perspective view of the assembly of the edge pressing member and the two pressing plate members.

[0025] Figure 10 is the perspective view of the releasing assembly.

[0026] Figure 11 is the perspective view of the limiting mechanism.

[0027] Figure 12 is the perspective view of the triangular gate.

[0028] In the figure: 1, tooling table; 11, support mold; 111, reverse deformation surface; 112, axial hole; 12, slow supporting member; 121, guide seat; 122, supporting strip; 123, guide rod; 124, material supporting disc spring; 2, side shift assembly; 21, support frame; 22, guide column; 23, stroke frame; 231, vertical guide rail; 3, pressing plate mechanism; 31, No. 1 hydraulic cylinder; 32, circular arc guide plate; 33, pressing plate member; 331, guide shaft; 332, sliding sleeve block; 333, roller seat block; 334, material pressing disc spring; 335, main pressing roller; 336, pin shaft; 34, releasing assembly; 341, No. 2 hydraulic cylinder; 342, No. 1 connecting rod; 343, arc-shaped plate; 344, arc-shaped hole; 4, edge pressing member; 41, auxiliary roller seat; 411, square shaft; 42, auxiliary pressing roller; 5, pressing frame assembly; 51, insertion rod seat; 52, insertion rod; 6, limiting mechanism; 61, hinged seat; 62, No. 3 hydraulic cylinder; 63, No. 2 connecting rod; 64, limiting baffle; 7, triangular gate; 71, triangular truss; 711, rotating shaft hole; 72, arc-shaped gate plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0031] As Figure 1 shown, an arc-shaped triangular gate welding tool, the triangular gate 7 main body is as Figure 12As shown, specifically includes triangular truss 71 and arc gate 72, triangular truss 71 and arc gate 72 are fixed and rotatably mounted on the triangular gate 7 pivot shaft, triangular truss 71 is a multi-truss welded assembly structure in the figure, but not limited to the structure shown in the figure, and in fact can be a triangular welded steel structure; The welding tool provided by the present application is actually a fixture tool for positioning and clamping the welding between the triangular truss 71 and the arc gate 72 of the triangular gate 7, and the fixture tool is classified as a welding tool.

[0032] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, the welding tool includes a tool table 1, the tool table 1 is centrally provided with a support mold 11, the support mold 11 is provided with a reverse deformation surface 111 for abutting and supporting the arc gate 72, and the curvature of the reverse deformation surface 111 is less than that of the arc gate 72; The bottom end of the tool table 1 is a hollow structure at the position of the support mold 11, and a plurality of buffer members 12 are fixed in the cavity of the tool table 1 and uniformly distributed along the arc line direction of the reverse deformation surface 111; A plurality of axial holes 112 corresponding to the plurality of buffer members 12 are formed in the reverse deformation surface 111, and the axial holes 112 extend in the axial direction of the reverse deformation surface 111; The buffer member 12 includes a guide seat 121 fixed on the inner end face of the tool table 1 by bolts, a supporting strip 122 is slidably fitted and installed on the guide seat 121 in the radial direction of the reverse deformation surface 111, a plurality of guide rods 123 are welded on the bottom end of the supporting strip 122 and slidably fitted with the guide seat 121, the plurality of guide rods 123 are uniformly distributed in the axial direction of the reverse deformation surface 111, four pairs of material supporting disc springs 124 are sleeved on the guide rods 123, and the four pairs of material supporting disc springs 124 are located between the supporting strip 122 and the guide seat 121; The top supporting end of the supporting strip 122 is a semicircular head structure, so as to provide support for the arc surface of the arc gate 72, and the supporting end of the supporting strip 122 passes through the corresponding axial hole 112 under the support of the material supporting disc spring 124.

[0033] The material is affected by thermal expansion and contraction, so when the arc-shaped gate 72 is actually welded, when the welding is completed and the arc-shaped gate 72 is in the process of gradually cooling, the arc-shaped gate 72 will produce an inward shrinkage deformation close to the center of curvature. In order to effectively control the welding deformation and reduce the effect of deformation on the use of the arc-shaped gate 72, in the present application, before welding the arc-shaped gate 72, the arc-shaped gate 72 is pre-deformed in the opposite direction to the shrinkage direction. When the arc-shaped gate 72 is cooled and shrunk, the shrinkage deformation of the arc-shaped gate 72 is automatically compensated as the pre-deformation, so that the shape of the arc-shaped gate 72 after cooling and shrinking is basically close to the original shape, thereby eliminating the influence of welding deformation; after pre-deformation, the curvature of the arc-shaped gate 72 is relatively reduced, and the counter-deformation surface 111 on the support mold 11 is the same as the curvature of the arc-shaped gate 72 after pre-deformation. It should be noted that the curvature deviation between the counter-deformation surface 111 and the arc-shaped gate 72 can be adjusted and modified by welding test to determine the appropriate size of the curvature of the counter-deformation surface 111.

[0034] As shown in Figure 2 and Figure 3 , the tooling table 1 is fixed with two side shift assemblies 2, and the two side shift assemblies 2 are arranged on the two sides of the support mold 11 in axial symmetry along the counter-deformation surface 111; the side shift assembly 2 includes a support frame 21, two guide columns 22 and a stroke frame 23, the support frame 21 is fixed on the tooling table 1 by bolts, the two guide columns 22 are axially slidably installed on the support frame 21, and the stroke frame 23 is welded between the end portions of the two guide columns 22. The support frame 21 can be horizontally fixed with a hydraulic cylinder, and the output end of the hydraulic cylinder is fixed on the stroke frame 23, or a lead screw can be threadedly and rotatably installed on the support frame 21, and the lead screw is horizontally rotatably installed on the stroke frame 23 through a bearing, so that the stroke frame 23 can be driven horizontally by the hydraulic cylinder or manually driven by the lead screw. In this embodiment, the hydraulic cylinder is preferably assembled.

[0035] As shown in Figure 2 and Figure 12 , the tooling table 1 is assembled with a pressing plate assembly, and the pressing plate assembly includes two pressing plate mechanisms 3 and two pressing edge members 4 assembled between the two pressing plate mechanisms 3; the two pressing plate mechanisms 3 can be correspondingly pressed on the arc-shaped gate 72 at the side edge positions close to the two axial ends, and the two pressing edge members 4 can be correspondingly pressed on the arc-shaped gate 72 at the side edge positions close to the two ends of the arc line; the two pressing plate mechanisms 3 and the two pressing edge members 4 constitute a pressing frame for pressing the arc-shaped gate 72 to fit on the counter-deformation surface 111, and the frame inside the pressing frame constitutes a clearance area for welding between the triangular truss 71 and the arc-shaped gate 72.

[0036] As shown in Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, two pressing plate mechanisms 3 are correspondingly assembled on the stroke frames 23 of the two side displacement assemblies 2, and the two pressing plate mechanisms 3 are symmetrically arranged; the pressing plate mechanism 3 comprises two No. 1 hydraulic cylinders 31 which are fixed on the top end of the stroke frame 23 by bolts in an inverted manner, and a circular arc guide plate 32 is horizontally fixed between the output ends of the two No. 1 hydraulic cylinders 31 by bolts, and a circular arc plate segment with a notch whose front face faces upward is arranged in the middle of the circular arc guide plate 32; it is necessary to supplement that, in order to improve the strength, vertical guide structures such as plates or rods can be cooperatively arranged between the circular arc guide plate 32 and the stroke frame 23; a plurality of pressing plate pieces 33 are assembled on the circular arc plate segment and are uniformly distributed along the circumferential direction of the circular arc plate segment, and a release assembly 34 connected with the plurality of pressing plate pieces 33 is also assembled on the circular arc guide plate 32; in the present application, in order to cooperatively distribute and connect the plurality of pressing plate pieces 33 and the release assembly 34, and to ensure the symmetry of the distribution of the pressing contact points between the plurality of pressing plate pieces 33 and the arc-shaped gate plate 72, the number of the plurality of pressing plate pieces 33 is an even number and is horizontally symmetrically arranged about the circular arc center axis of the circular arc plate segment; it is necessary to emphasize that the number of the pressing plate pieces 33 in the pressing plate mechanism 3 shown in the drawings is six, and this number does not represent the actual arrangement number of the pressing plate pieces 33; according to the actual size of the arc-shaped gate plate 72, and in order to ensure that the distribution of the pressing contact points on the arc-shaped gate plate 72 is more uniform and sufficient, a certain number of pressing plate pieces 33 can be correspondingly arranged and reasonably laid out and assembled.

[0037] As shown in Figure 7 , Figure 8 , Figure 9 and Figure 12 , the pressing plate piece 33 comprises a guide shaft 331 which is installed in sliding mode along the radial direction on the circular arc plate segment, the guide shaft 331 is assembled in key cooperation with the circular arc plate segment, a stepped end which avoids sliding off the circular arc plate segment is arranged at the top end of the guide shaft 331, a roller seat block 333 is welded at the bottom end of the guide shaft 331, a sliding sleeve block 332 is sleeved on the guide shaft 331 in sliding mode through key cooperation, four pressure material disc springs 334 are also sleeved on the guide shaft 331, and the four pressure material disc springs 334 are located between the sliding sleeve block 332 and the roller seat block 333, and two main pressure rollers 335 are rotatably installed on the roller seat block 333; two pressing contact points are obtained between a single pressing plate piece 33 and the arc-shaped gate plate 72 through the two main pressure rollers 335, so as to avoid single-roller single-point pressing; it is necessary to supplement that, in the present application, the cushioning piece 12 is supported by the material supporting disc spring 124 in an elastic manner, and the pressing plate piece 33 is pressed in an elastic manner by the pressure material disc spring 334; the structural characteristics of the disc spring are different from those of the cylindrical helical spring and other springs, especially the non-linear force deformation characteristics of the disc spring, which can provide better stability and dynamic response in force.

[0038] As shown in Figure 4 , Figure 7 , Figure 8 , Figure 10 and Figure 12As shown, the release assembly 34 comprises a No. 2 hydraulic cylinder 341 vertically fixed on the circular arc plate segment through the fixing frame, the No. 2 hydraulic cylinder 341 is arranged in the center in the arc direction of the circular arc plate segment, the output end of the No. 2 hydraulic cylinder 341 is hinged with two No. 1 connecting rods 342, the other end of the two No. 1 connecting rods 342 is hinged with two arc-shaped plates 343, the two arc-shaped plates 343 are horizontally symmetrically arranged, the hinge position of the No. 1 connecting rod 342 and the arc-shaped plate 343 is located at one end of the two arc-shaped plates 343 relatively close to each other, and the other end of the two arc-shaped plates 343 relatively far away from each other is hinged on the circular arc guide plate 32; the two arc-shaped plates 343 are correspondingly arranged with the two groups of pressing plate pieces 33 distributed on both sides of the central axis of the circular arc guide plate 32, the arc-shaped plate 343 is provided with an arc-shaped hole 344 extending along the arc line thereof, the slide block 332 is welded with a pin shaft 336, the pin shafts 336 distributed on the plurality of pressing plate pieces 33 on the same side of the central axis of the circular arc guide plate 32 are commonly arranged in the arc-shaped hole 344 of the corresponding arc-shaped plate 343, and the pin shaft 336 can move along the arc-shaped hole 344; in the present application, when the output end position of the No. 2 hydraulic cylinder 341 is the lowest, that is, the telescopic rod of the No. 2 hydraulic cylinder 341 is fully extended, the circular arc center points of the two arc-shaped plates 343 coincide with the circular arc center axis of the circular arc plate segment, that is, the arc lines of the two arc-shaped plates 343 coincide, when the arc-shaped gate plate 72 is pressed by the pressing plate piece 33, the No. 2 hydraulic cylinder 341 is in the pressure maintaining and locking state, and the output end of the No. 2 hydraulic cylinder 341 is the lowest, because the plurality of pressing plate pieces 33 are distributed in the circumferential direction on the circular arc plate segment, and at this time, under the restriction and locking constraint of the release assembly 34, the plurality of slide blocks 332 are also distributed in the circumferential direction on the circular arc plate segment, so that the distance between the main pressing roller 335 in each pressing plate piece 33 and the corresponding slide block 332 in the initial pressing state remains equal, so as to reduce the pressure difference value after each pressing plate piece 33 synchronously presses the arc-shaped gate plate 72.

[0039] As shown in Figure 4 , Figure 9 and Figure 12 , two pressing plate mechanisms 3 are assembled with a pressing edge piece 4 between the two pressing plate pieces 33 distributed on the same side of the circular arc center axis of the circular arc guide plate 32 and horizontally farthest from the circular arc center axis; the pressing edge piece 4 comprises a secondary roller roller seat 41, a square shaft 411 is horizontally and fixedly welded and arranged through the secondary roller roller seat 41, the secondary roller roller seat 41 is horizontally and slidably installed on the two roller seat blocks 333 through the square shaft 411, and two secondary pressing rollers 42 are horizontally and rotatably installed on the secondary roller roller seat 41; in the present embodiment, the diameters of the secondary pressing rollers 42 and the main pressing rollers 335 are the same, and the center axes of the two secondary pressing rollers 42 and the center axes of the two main pressing rollers 335 in the two end pressing plate pieces 33 coincide, the two outermost pressing plate pieces 33 are connected in series through the assembly of the pressing edge piece 4, the consistency of the pressing state can be maintained, in addition, the two secondary pressing rollers 42 are located between the two groups of main pressing rollers 335, which is equivalent to continuing the series connection between the two groups of main pressing rollers 335, and can synchronously and jointly press on the arc-shaped gate plate 72.

[0040] As Figure 2 , Figure 7 and Figure 12 shown, two travel frames 23 are correspondingly equipped with a pressing frame assembly 5, and the two pressing frame assemblies 5 are used together to press the triangular truss 71 on the arc-shaped gate 72; the travel frame 23 is welded with a vertical guide rail 231; the pressing frame assembly 5 includes a plug rod seat 51 slidingly installed on the vertical guide rail 231 and a plug rod 52 horizontally welded on the plug rod seat 51, the central axis of the plug rod 52 is located on the same vertical plane as the central axis of the reverse deformation surface 111, the plug rod 52 is used for plugging in the rotating shaft hole 711 of the triangular truss 71, and the plug rod 52 is provided with a stepped end face clamped with the outer end face of the rotating shaft hole 711 of the triangular truss 71; the vertical guide rail 231 is vertically fixed with a hydraulic cylinder through a fixed seat, and the hydraulic cylinder can be used to adjust the plug rod 52 to be aligned with the rotating shaft hole 711, and on the other hand, when the plug rod 52 is inserted into the rotating shaft hole 711, the plug rod seat 51 and the plug rod 52 are synchronously lowered by the hydraulic cylinder, and then the triangular truss 71 can be pressed on the arc-shaped gate 72 as a whole.

[0041] As Figure 3 , Figure 4 , Figure 11 and Figure 12 shown, in order to limit the amplitude of the arc-shaped gate 72 after welding and cooling shrinkage, and to avoid excessive internal shrinkage deformation, the tooling table 1 is also equipped with two horizontally arranged limiting mechanisms 6, the two limiting mechanisms 6 are correspondingly arranged adjacent to the two pressing edges 4, and the two pressing edges 4 are located between the two limiting mechanisms 6. The pressing edge 4 includes a hinged seat 61 welded on the side wall of the tooling table 1, a limiting baffle 64 is horizontally hinged on the hinged seat 61, two No. 3 hydraulic cylinders 62 are horizontally fixed on the hinged seat 61 through bolts, a No. 2 connecting rod 63 is hinged on the output end of the No. 3 hydraulic cylinder 62, and the other end of the No. 2 connecting rod 63 is hinged on the limiting baffle 64.

[0042] The present application provides an arc-shaped triangular gate welding tooling for welding positioning and clamping of the triangular gate 7, and the specific operation is as follows: first, the arc-shaped gate 72 is placed on the reverse deformation surface 111, at this time, the arc-shaped gate 72 is in the outer shape state, then the No. 3 hydraulic cylinders 62 of the two limiting mechanisms 6 are started synchronously, the limiting baffle 64 is turned over through the No. 2 connecting rod 63, so that the two limiting baffles 64 are just lapped on the side edge position of the arc-shaped gate 72 located at the two ends of the arc, thereby marking the side end position of the arc-shaped gate 72 in the initial outer shape state, so as to avoid excessive internal shrinkage deformation of the arc-shaped gate 72 subsequently.

[0043] Then, the triangular truss 71 is placed on the arc-shaped gate 72, and then the two stroke frames 23 are moved close to each other, the height of the two insertion rods 52 is adjusted, the two insertion rods 52 are aligned and inserted into the rotating shaft hole 711 of the triangular truss 71, and the two stroke frames 23 continue to move, during the movement, the main pressing roller 335 of each pressing plate 33 is placed on the arc-shaped gate 72 until the triangular truss 71 is clamped between the stepped ends of the two insertion rods 52.

[0044] Then, the one hydraulic cylinder 31 of the two pressing plate mechanisms 3 is started synchronously, so that the two circular arc guide plates 32 are lowered synchronously, at this time, the output end position of the two hydraulic cylinders 341 is the lowest, the pressure retaining locking of the two hydraulic cylinders 341 indirectly makes the sliding sleeve block 332 of each pressing plate 33 be in the locking state, the sliding sleeve block 332 and the release assembly 34 are lowered synchronously with the circular arc guide plate 32, the spacing between the roller seat block 333 and the sliding sleeve block 332 gradually decreases, then the material pressing disc spring 334 starts to be compressed, and is indirectly pressed on the arc-shaped gate 72 through the main pressing roller 335, in addition, the auxiliary pressing roller 42 is also pressed on the arc-shaped gate 72, the pressing plate assembly is actively pressed on the arc-shaped gate 72 by the pressing frame composed of the two pressing plate mechanisms 3 and the two pressing edges 4, so that the arc-shaped gate 72 is passively deformed and tightly attached to the reverse deformation surface 111, thereby being reversely pre-deformed in the relative inward direction, the arc-shaped gate 72 is indirectly pressed on the supporting strip 122, so that the material supporting disc spring 124 is compressed until the supporting strip 122 is lowered to the position where the top semicircular head structure is tangent to the reverse deformation surface 111. When the arc-shaped gate 72 is pressed, the triangular truss 71 can be pressed on the arc-shaped gate 72 by the two pressing frame assemblies 5, so that the welding positioning and clamping between the triangular truss 71 and the arc-shaped gate 72 is completed.

[0045] Then, welding can be performed. In order to control the deformation of the arc-shaped gate 72, symmetric welding can be actually adopted, that is, starting from the position close to the center axis of the arc-shaped gate 72, welding is performed outward along the arc line of the arc-shaped gate 72 in steps, and after each step of welding, the pressing edges 4 distributed on both sides of the center axis of the arc-shaped gate 72 are synchronously released by the release assembly 34. Specifically, the two hydraulic cylinders 341 are started to contract, the arc-shaped plate 343 is driven to rotate around the hinge shaft by the one connecting rod 342, the sliding sleeve block 332 is driven to move upward along the guide shaft 331 by the arc-shaped hole 344 of the arc-shaped plate 343 and the pin shaft 336, and the pressing edge 4 is released. Figure 4Under the perspective, taking the left arc-shaped plate 343 as an example, it is obvious that the closer to the center axis of the arc-shaped gate plate 72, the greater the distance of the sheath block moving upward under the driving of the arc-shaped plate 343, so that the pressing force of the pressing plate 33 distributed from near to far relative to the center axis of the arc-shaped gate plate 72 in the horizontal direction can be gradually reduced from large to small, and as the welding proceeds step by step, the pressing constraint force is actively released, and the constraint force release degree is greater near the position of the first welding, avoiding the accumulation of internal stress caused by the early cooling of the first welding part, improving the uniformity of the deformation of the arc-shaped gate plate 72, reducing the problem of uneven cooling deformation caused by welding in sequence during the welding process, and providing synchronous support during the deformation process. Multiple buffer pieces 12 control the uniformity of deformation, reduce the generation and accumulation of internal stress, eliminate the adverse effects of internal stress on the structural strength stability, reliability and service life of the triangular gate 7, and under the limitation of the two limiting mechanisms 6, the inward deformation of the arc-shaped gate plate 72 reaches the limit position and stops, so that the arc-shaped gate plate 72 can be restored to a state close to the initial external structure, thereby ensuring the sealing effect of the arc-shaped gate plate 72 in actual use.

[0046] After the welding is completed, the welding tool is loosened, and the welded triangular gate 7 is taken off.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In the description of the present application, it should be understood that unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0049] The preferred embodiments of the present application have been described. It is to be understood that the application is not limited to the above specific embodiments, and that devices and structures not described in detail should be understood to be implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications, or modify equivalent embodiments without departing from the technical solutions of the present application, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical essence of the present application, without departing from the technical solutions of the present application, still belongs to the protection scope of the technical solutions of the present application.

Claims

1. A welding fixture for an arc-shaped triangular gate, used for positioning and clamping the welding between the triangular truss and the arc-shaped gate plate of the triangular gate, characterized in that, include: The tooling table has a reverse deformation surface that is used to fit and support the arc-shaped gate and has a curvature smaller than that of the arc-shaped gate. Two lateral displacement assemblies are symmetrically distributed on both sides of the anti-deformation surface; The lateral displacement assembly includes a stroke frame that moves axially along the anti-deformation surface; The pressure plate assembly includes two pressure plate mechanisms that are one-to-one assembled on two stroke frames and can correspondingly press against the sides of the arc-shaped gate plate near the axial ends. The pressure plate mechanism includes multiple pressure plate components that can press along the arc direction of the arc-shaped gate plate. When symmetrically welded along the arc from near the central axis of the arc-shaped gate plate to both ends of the arc, the pressing force of the pressure plate components distributed from near to far from the central axis of the arc-shaped gate plate in the horizontal direction can gradually decrease from large to small. Two edge pressing components that can correspondingly press against the sides of the arc-shaped gate plate near the ends of the arc are horizontally slidably installed between the two pressure plate mechanisms. Two pressure frame components are assembled one-to-one on two stroke frames, and together they are used to press the triangular truss onto the arc-shaped gate plate. Two limiting mechanisms are set adjacent to two pressing parts to limit the range of cooling and shrinkage of the arc-shaped gate after welding.

2. The arc-shaped triangular gate welding fixture according to claim 1, characterized in that: The pressure plate mechanism also includes a lifting and lowering arc guide plate with the notch facing upward. Multiple pressure plate components are distributed circumferentially along the arc guide plate and are radially slidably mounted on the arc guide plate. A release mechanism is assembled on the arc guide plate. The multiple pressure plate components are horizontally symmetrically distributed about the arc central axis of the arc guide plate, and the two sets of pressure plate components distributed on both sides of the arc central axis of the arc guide plate are connected to the release mechanism. Under the drive of the release component, the pressing force of the pressure plate components distributed from near to far relative to the arc central axis of the arc guide plate in the horizontal direction on the arc gate can be gradually reduced from large to small.

3. The arc-shaped triangular gate welding fixture according to claim 1, characterized in that: A support mold is provided on the tooling table, and the anti-deformation surface is provided on the support mold; The bottom of the tooling table is a cavity structure located at the support mold. Multiple buffer supports are fixed inside the cavity of the tooling table, distributed along the arc direction of the anti-deformation surface. The buffer supports are provided with a support end that passes through the anti-deformation surface and is used to elastically support the arc-shaped gate.

4. The arc-shaped triangular gate welding fixture according to claim 2, characterized in that: The pressure plate component includes a guide shaft that is radially slidably mounted on an arc-shaped guide plate. A roller seat block is fixed at the bottom end of the guide shaft. A sliding sleeve block is slidably mounted on the guide shaft. Multiple pressure disc springs are also mounted on the guide shaft, and the multiple pressure disc springs are located between the sliding sleeve block and the roller seat block. Multiple main pressure rollers are rotatably mounted on the roller seat block. The pressure plate component is connected to the release assembly through the sliding sleeve block.

5. The arc-shaped triangular gate welding fixture according to claim 4, characterized in that: The release assembly includes two horizontally symmetrically arranged arc-shaped plates, which correspond to two sets of pressure plates distributed on both sides of the central axis of the arc guide plate. The arc-shaped plates are provided with arc-shaped holes extending along their arcs. Pins are fixed on the sliding block. Pins on multiple pressure plates distributed on the same side of the central axis of the arc guide plate are all connected through the arc-shaped holes of the corresponding arc plates. The relatively far ends of the two arc plates are both hinged to the arc guide plate, and the relatively close ends of the two arc plates are both hinged to a first connecting rod. A vertical drive component is fixed on the arc guide plate, and the other ends of the two first connecting rods are hinged to the drive end of the vertical drive component.

6. The arc-shaped triangular gate welding fixture according to claim 4, characterized in that: The pressing element is assembled between the two pressing plate components that are located on the same side of the arc center axis of the arc guide plate and are horizontally farthest from the arc center axis in the two pressing plate mechanisms; the pressing element includes a secondary roller seat that is horizontally slidably installed between two roller seat blocks, and multiple secondary pressure rollers are horizontally rotatably installed on the secondary roller seat.

7. The arc-shaped triangular gate welding fixture according to claim 1, characterized in that: The pressure frame assembly includes a rod seat that is vertically slidably mounted on the travel frame and a rod that is horizontally fixed on the rod seat. The rod is arranged parallel to the central axis of the anti-deformation surface. The rod is used to insert into the pivot hole of the triangular truss, and the rod is provided with a stepped end face that clamps with the outer end face of the pivot hole of the triangular truss.

8. The arc-shaped triangular gate welding fixture according to claim 3, characterized in that: The anti-deformation surface is provided with a plurality of axial holes corresponding to a plurality of buffer components, and the axial holes extend axially along the anti-deformation surface; the buffer component includes a guide seat fixed on the inner end face of the tooling table cavity, and a support strip is slidably installed on the guide seat along the anti-deformation surface. The support strip passes through the corresponding axial hole, and a plurality of guide rods are fixed on the support strip and slidably fitted with the guide seat. A plurality of material-supporting disc springs are sleeved on each guide rod, and the plurality of material-supporting disc springs are located between the support strip and the guide seat.

9. The arc-shaped triangular gate welding fixture according to claim 5, characterized in that: When the driving end of the vertical drive member is at its lowest height, the center point of the arc of the two arc plates coincides with the center axis of the arc of the arc guide plate.

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