Supporting, positioning and welding device for inner side of cavity

Abstract

The invention relates to the technical field of machining, and provides a cavity inner side supporting, positioning and welding device which comprises a base assembly, two sheet plate assemblies, two side plate assemblies and four pressing assemblies, the two sheet plate assemblies are arranged on the two adjacent sides of the base assembly in parallel, and the two side plate assemblies are arranged on the side faces of the sheet plate assemblies correspondingly; the four pressing assemblies are arranged on the outer side of the base assembly and the outer side of the side plate assembly respectively, when the pressing assemblies are matched with the base assembly and the side plate assembly, the four corner areas of the pressing assemblies are kept open, the two ends of the sheet plate assembly are in linkage fit with the base assembly and the side plate assembly respectively, and therefore the sheet plate assembly drives the side plate assembly to move inwards when moving upwards. Contraction of the supporting structure is achieved. According to the device, the supporting structure on the inner side of the cavity can be rapidly contracted and taken out, welding contraction deformation is effectively adapted, and the welding precision and concentricity of workpieces are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a cavity inner side support positioning welding device. Background Technology

[0002] With the continuous development of the machining field, cavity structure welding is widely used in the manufacturing industry. Such structures are usually composed of inner and outer cavities, which form a closed space after welding. Therefore, how to achieve precise support and positioning on the inner side of the cavity and ensure that the device is easy to remove is of great significance for improving welding quality, ensuring workpiece accuracy and improving processing efficiency.

[0003] Currently, when common positioning and clamping devices perform support and positioning welding on the inner side of the cavity, the internal support often needs to be removed by hammering or forceful pulling due to the effect of welding shrinkage. This results in difficulties in removing the workpiece, low processing efficiency, and easy damage to the device or workpiece. On the other hand, if the support structure is fixed on the same side of the cavity, the workpiece can be moved out in a specific direction. However, when the outside of the cavity is a non-positioning surface or there is interference from other parts, it will lead to inaccurate positioning or ineffective positioning, which limits its application range.

[0004] Chinese patent CN111590256A discloses a cavity welding positioning device. This device solves the problems of inaccurate welds and leakage caused by deformation during cavity welding by cooperating with an inner support unit, an outer support unit and a clamping unit. However, it still has the shortcomings of making it difficult to remove the inner support unit after welding and not being able to effectively adapt to the shrinkage deformation of welding, which affects the accuracy of the workpiece and results in low removal efficiency.

[0005] Therefore, how to provide an easy-to-remove welding device with internal cavity support and positioning that can achieve precise positioning, adapt to welding shrinkage changes, and quickly and effortlessly shrink the support structure after welding to facilitate the removal of the workpiece has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of this, in order to overcome the shortcomings of the prior art, the present invention aims to provide an inner cavity support positioning welding device.

[0007] This invention provides an internal cavity support positioning welding device, which includes a base assembly, two sets of plate assemblies, two sets of side plate assemblies, and four sets of clamping assemblies. The two sets of plate assemblies are located on adjacent sides of the base assembly, and the two sets of side plate assemblies are located on the sides of the plate assemblies. The four sets of clamping assemblies are located on the outer sides of the base assembly and the side plate assemblies. When the clamping assemblies cooperate with the base assembly and the side plate assemblies, their four corner areas remain open. The two ends of the plate assemblies are respectively linked with the base assembly and the side plate assemblies, so that when the plate assemblies move upward, they drive the side plate assemblies to move inward, thereby realizing the contraction of the support structure.

[0008] Optionally, in the cavity inner side support positioning welding device of the present invention, the plate assembly includes a frame, two first plates, two second plates, multiple first cam bearings and multiple adjusting shims. A set of first plates and second plates are provided at each end of the frame. The first plates and second plates at the same end are arranged parallel to each other on both sides of the frame. Multiple first cam bearings are respectively installed at both ends of the first plates and second plates. Adjusting shims are provided between the first plates and second plates.

[0009] Optionally, in the cavity inner side support positioning welding device of the present invention, the base assembly includes a base, two first side plates and two second side plates, the two first side plates are respectively fixedly disposed at adjacent ends of the base, the two second side plates are respectively fixedly disposed at the other ends of the base, and the flange is disposed on the first side plate.

[0010] Optionally, in the cavity inner side support positioning welding device of the present invention, a first groove is provided at the corner of the first side plate and a first through hole is provided on both sides, and a second through hole is provided on the second side plate, the second through hole being coaxially arranged with the flange.

[0011] Optionally, in the cavity inner side support positioning welding device of the present invention, the side plate assembly includes a third side plate, two sets of adjustment components and two second cam bearings. The two sets of adjustment components are symmetrically installed on the third side plate, and the two second cam bearings are respectively installed on the bottom two sides of the third side plate.

[0012] Optionally, in the cavity inner side support positioning welding device of the present invention, the corner of the third side plate is provided with a second groove and the middle is provided with a third through hole.

[0013] Optionally, in the cavity inner side support positioning welding device of the present invention, the first cam bearing of the plate assembly rolls into contact with the first side plate on the base assembly and the third side plate on the side plate assembly.

[0014] Optionally, in the cavity inner side support positioning welding device of the present invention, the adjusting component includes a screw, a bolt and a spring. The screw passes through the first through hole, the bolt is fixed in cooperation with the screw, and the spring is sleeved on the screw and located between the bolt and the first side plate.

[0015] Optionally, in the cavity inner side support positioning welding device of the present invention, the clamping component includes a clamping plate, which has a plurality of circular holes arranged in an array, two cylinders symmetrically arranged, and a fourth through hole in the middle.

[0016] Optionally, in the cavity inner side support positioning welding device of the present invention, the clamping assembly further includes two clamping clamps and two pushing clamps, with the clamping clamps and pushing clamps respectively installed on the outside of the clamping plate.

[0017] The cavity inner side support and positioning welding device of the present invention has the following beneficial technical effects: 1. It enables quick and labor-saving removal of the device after welding, avoiding the inefficiency and workpiece damage caused by traditional hammering or pulling methods.

[0018] 2. It can effectively adapt to welding shrinkage, and the concentricity of the inner and outer cavity holes and the overall dimensional accuracy are ensured by fine-tuning the support spacing.

[0019] 3. It ensures both positioning reliability and ease of operation, guaranteeing stable clamping during the welding process and smooth retraction during removal.

[0020] 4. It supports continuous operation of multiple processes, and can complete the continuous positioning and welding of inner and outer cavities without disassembling the device, thus improving production continuity and efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an example diagram of a cavity inner side support positioning welding device according to an embodiment of the present invention; Figure 2 This is another structural example diagram of a cavity inner side support positioning welding device according to an embodiment of the present invention; Figure 3 This is an example diagram of the base component structure according to an embodiment of the present invention; Figure 4 This is an example diagram of a sheet assembly structure according to an embodiment of the present invention; Figure 5 This is an example diagram of the side panel assembly structure according to an embodiment of the present invention; Figure 6 This is a first partial cross-sectional view of an easily removable cavity inner support positioning welding device according to an embodiment of the present invention; Figure 7 This is a second partial cross-sectional view of an easily removable cavity inner support positioning welding device according to an embodiment of the present invention; Figure 8 This is a structural example diagram of a clamping assembly according to an embodiment of the present invention; Figure 9 This is an example diagram of the internal cavity structure of a workpiece according to an embodiment of the present invention; Figure 10 This is an example diagram of the external cavity structure of a workpiece according to an embodiment of the present invention; Figure 11This is an example diagram of a workpiece structure according to an embodiment of the present invention; Figure 12 This is a schematic diagram illustrating the working principle of the device according to an embodiment of the present invention; In the figure, 1-base assembly, 2-plate assembly, 3-side plate assembly, 4-clamping assembly, 5-workpiece inner cavity, 6-workpiece outer cavity, 11-base, 12-first side plate, 13-second side plate, 14-flange, 21-frame, 22-first plate, 23-second plate, 24-first cam bearing, 25-adjusting shim, 31-third side plate, 32-adjusting assembly, 33-second cam bearing, 41-clamping plate, 42-clamping clamp, 43-pushing clamp, 51-first hole, 61-second hole, 121-first groove, 122-first through hole, 131-second through hole, 311-second groove, 312-third through hole, 321-screw, 322-bolt, 323-spring, 411-round hole, 412-cylinder, 413-fourth through hole. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Figure 1 This is a structural example diagram of a cavity inner side support positioning welding device according to an embodiment of the present invention. Figure 2 This is another structural example diagram of a cavity inner side support positioning welding device according to an embodiment of the present invention, as shown below. Figure 1 , Figure 2As shown, in this embodiment, an internal cavity support positioning welding device includes a base assembly 1, two sets of plate assemblies 2, two sets of side plate assemblies 3, and four sets of clamping assemblies 4. The two sets of plate assemblies 2 are located on adjacent sides of the base assembly 1, and the two sets of side plate assemblies 3 are respectively located on the sides of the plate assemblies 2. The four sets of clamping assemblies 4 are respectively located on the outer sides of the base assembly 1 and the side plate assemblies 3. When the clamping assemblies 4 cooperate with the base assembly 1 and the side plate assemblies 3, their four corner areas remain open, reserving operating space for corner welding of the workpiece. The two ends of the plate assemblies 2 are respectively linked to the base assembly 1 and the side plate assemblies 3, so that the plate assemblies 2 can drive the side plate assemblies 3 when they move, thereby realizing the adjustment and disassembly of the entire support structure.

[0027] Figure 3 This is an example diagram of the base component structure according to an embodiment of the present invention, such as... Figure 3 As shown, in this embodiment, the base assembly 1 includes a base 11, two first side plates 12, two second side plates 13, and a flange 14. The two first side plates 12 are respectively fixedly disposed at adjacent ends of the base 11, the two second side plates 13 are respectively fixedly disposed at the other ends of the base 11, and the flange 14 is disposed on the first side plate 12.

[0028] The first side plate 12 has a first groove 121 at its corner and first through holes 122 on both sides. The second side plate 13 has a corresponding second through hole 131. The through hole is coaxially arranged with the flange 14 to meet the concentric positioning requirements of the workpiece on opposite sides during welding.

[0029] Figure 4 This is an example diagram of a sheet metal assembly structure according to an embodiment of the present invention, such as... Figure 4 As shown, in this embodiment, the plate assembly 2 includes a frame 21, two first plates 22, two second plates 23, multiple first cam bearings 24, and multiple adjusting shims 25. A set of first plates 22 and a set of second plates 23 are provided at each end of the frame 21. The first plates 22 and second plates 23 at the same end are arranged parallel to each other on both sides of the frame 21. Multiple first cam bearings 24 are respectively installed at both ends of the first plates 22 and the second plates 23. Adjusting shims 25 are disposed between the first plates 22 and the second plates 23 to adjust the distance between them, thereby controlling the flange distance of the first cam bearings 24.

[0030] It should be noted that in practical applications, the thickness of the adjusting shim 25 can be replaced according to the amount of welding shrinkage, adjusting the distance between the first plate 22 and the second plate 23, thereby fine-tuning the rim distance of the first cam bearings 24 at both ends.

[0031] Figure 5 This is an example diagram of the side panel assembly structure according to an embodiment of the present invention, such as... Figure 5As shown, in this embodiment, the side plate assembly 3 includes a third side plate 31, two sets of adjustment components 32 and two second cam bearings 33. The two sets of adjustment components 32 are symmetrically mounted on the third side plate 31, and the two second cam bearings 33 are respectively mounted on the bottom sides of the third side plate 31 for rolling on the base assembly 1 to reduce motion friction resistance.

[0032] The third side plate 31 has a second groove 311 at the corner and a third through hole 312 in the middle. The position of the third through hole 312 corresponds to the flange 14 on the base assembly 1 and the hole of the workpiece to be welded, and is used for assembly positioning.

[0033] Figure 6 This is a first partial cross-sectional view of an easily removable cavity inner support positioning welding device according to an embodiment of the present invention, as shown below. Figures 1 to 6 As shown, in this embodiment, the adjusting assembly 32 includes a screw 321, a bolt 322, and a spring 323. The screw 321 passes through the first through hole 122 on the first side plate 12. The bolt 322 is fixed to the screw 321. The spring 323 is sleeved on the screw 321 and located between the bolt 322 and the first side plate 12, providing a preload force to make the third side plate 31 tend to retract inward.

[0034] The side plate assembly 3 passes through the first through hole 122 of the first side plate 12 on the base assembly 1 via the screw 321 in its adjusting assembly 32, and is elastically connected to the base assembly 1 via bolts 322 and spring 323. The spring 323 stores elastic potential energy in the compressed state. When the plate assembly 2 is lifted, the spring 323 pushes the third side plate 31 to contract inward, thereby reducing the distance between the support surfaces.

[0035] It should be noted that, in practical applications, the side plate assembly 3 located on the long side of the base 11 and the side plate assembly 3 located on the short side have completely identical core structures, components, and mating methods with the base assembly 1. The only difference lies in the width of the third side plate 31, to accommodate the contours of the base 11 in different directions. Similarly, the frames 21 in the two sets of plate assemblies 2 have the same basic structure, connection relationship, and functional principle. They also have dimensional differences in length due to different assembly positions, to match the long and short sides of the base 11.

[0036] Figure 7 This is a second partial cross-sectional view of an easily removable cavity inner support positioning welding device according to an embodiment of the present invention, as shown below. Figures 1 to 7 As shown, in this embodiment, the first cam bearing 24 of the plate assembly 2 rolls into contact with both the first groove 121 on the base assembly 1 and the second groove 311 on the side plate assembly 3. When the plate assembly 2 is pulled upward, the first cam bearing 24 rolls along the groove contour, forcing the mating side plate assembly 3 to move inward, thereby achieving the shrinkage of the overall support structure and facilitating the removal of the workpiece.

[0037] Figure 8 This is a structural example diagram of a clamping assembly according to an embodiment of the present invention, such as... Figure 8 As shown, in this embodiment, the clamping assembly 4 includes a clamping plate 41, two clamping clamps 42, and two pushing clamps 43. The clamping clamps 42 and the pushing clamps 43 are respectively installed on the outside of the clamping plate 41 to achieve clamping and rapid pushing of the outer surface of the workpiece.

[0038] The clamping plate 41 has multiple circular holes 411 arranged in an array to allow the welding torch to pass through during welding operations. Two cylinders 412 are symmetrically arranged on the clamping plate 41 to compensate for the clamping distance of the clamping clamp 43. A fourth through hole 413 is also provided in the middle of the clamping plate 41. The position of this fourth through hole 413 corresponds to the flange 14 on the base assembly 1 and the third through hole 312 on the side plate assembly 3 (or the second through hole 131 on the second side plate 13 that is coaxial with it). In practical applications, a locating pin can be sequentially passed through the fourth through hole 413, the flange 14, and the corresponding third through hole 312 or second through hole 131 to achieve final precise positioning of the clamping assembly 4 with the entire device, ensuring the concentricity of the workpiece on opposite sides during welding.

[0039] Figure 9 This is an example diagram of the internal cavity structure of a workpiece according to an embodiment of the present invention. Figure 10 This is an example diagram of the workpiece outer cavity structure according to an embodiment of the present invention. Figure 11 This is an example diagram of a workpiece structure according to an embodiment of the present invention. Figure 12 This is a schematic diagram of the working principle of a device according to an embodiment of the present invention, such as... Figures 1 to 12 As shown, the application principle of this device is as follows: 1. Internal cavity welding stage The workpiece is initially positioned by engaging with the flange 14 and the second through hole 131 or the third through hole 312 on the base assembly 1 with the first hole 51 in the inner cavity 5 of the workpiece. The side plate assembly 3 unfolds outward under the action of the spring 323 of the adjusting assembly 32, causing the third side plate 31 to fit tightly against the inner wall of the inner cavity, forming a stable support. The clamping assembly 4 clamps and pushes the inner cavity 5 of the workpiece externally. The four open areas formed by the four sets of clamping assemblies 4 provide direct operating space for the welding torch to complete the welding operation at the four corners of the inner cavity 5 of the workpiece. At this time, the plate assembly 2 is in its initial position, with its first cam bearing 24 located below the lowest point of the first groove 121 of the base assembly 1 and the second groove 311 of the side plate assembly 3.

[0040] 2. External cavity welding stage After completing the welding of the inner cavity 5 of the workpiece, keep the device position unchanged and loosen the clamping assembly 4. Fit the sheet metal of the outer cavity 6 of the workpiece onto the outside of the inner cavity 5 of the workpiece, and align the first hole 51 of the inner cavity 5 with the second hole 61 of the outer cavity 6 of the workpiece through the flange 14 and the second through hole 131 or the third through hole 312 on the base assembly 1. Re-tighten the clamping assembly 4, keeping the four corner areas of the clamping plate 41 open, allowing the welding torch to directly weld the four corners of the outer cavity 6 of the workpiece. Simultaneously, the circular holes 411 on the clamping plate 41 provide additional operating space for the welding torch, assisting in completing the welding work on the remaining parts of the outer cavity 6 of the workpiece.

[0041] 3. Device Removal Stage After welding is completed, the plate assembly 2 is lifted upwards. The first cam bearing 24 rolls into the first groove 121 of the base assembly 1 and the second groove 311 of the side plate assembly 3, pushing the side plate assembly 3 inwards. At the same time, the spring 323 releases its stored energy, assisting the third side plate 31 to retract inwards, reducing the radial dimension of the entire support structure, thus allowing it to be smoothly removed from the welded cavity.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cavity inside support positioning welding device, characterized in that, The inside of the cavity supports the positioning welding device, which comprises a base assembly (1), two sets of sheet plate assemblies (2), two sets of side plate assemblies (3) and four sets of pressing assemblies (4). The two sets of sheet plate assemblies (2) are arranged on the adjacent sides of the base assembly (1), the two sets of side plate assemblies (3) are arranged on the sides of the sheet plate assemblies (2), and the four sets of pressing assemblies (4) are arranged on the outer sides of the base assembly (1) and the side plate assemblies (3). When the pressing assembly (4) is matched with the base assembly (1) and the side plate assembly (3), the four corner areas remain open. The two ends of the sheet plate assembly (2) are linked and matched with the base assembly (1) and the side plate assembly (3), so that when the sheet plate assembly (2) moves upward, the side plate assembly (3) moves inward, realizing the contraction of the support structure.

2. The apparatus of claim 1, wherein, The sheet plate assembly (2) comprises a frame (21), two first sheet plates (22), two second sheet plates (23), a plurality of first cam bearings (24) and a plurality of adjusting washers (25). The frame (21) is provided with a set of first sheet plates (22) and second sheet plates (23) at both ends. The first sheet plate (22) and the second sheet plate (23) at the same end are arranged in parallel on both sides of the frame (21). The plurality of first cam bearings (24) are respectively installed at both ends of the first sheet plate (22) and the second sheet plate (23). The adjusting washer (25) is arranged between the first sheet plate (22) and the second sheet plate (23).

3. The apparatus of claim 1, wherein, The base assembly (1) comprises a base (11), two first side plates (12), two second side plates (13) and a flange (14). The two first side plates (12) are fixedly arranged on the adjacent two ends of the base (11). The two second side plates (13) are fixedly arranged on the other two ends of the base (11). The flange (14) is arranged on the first side plate (12).

4. The apparatus of claim 3, wherein, The corner of the first side plate (12) is provided with a first groove (121), and the two sides are provided with a first through hole (122). The second side plate (13) is provided with a second through hole (131), and the second through hole (131) is coaxially arranged with the flange (14).

5. The apparatus of claim 1, wherein, The side plate assembly (3) comprises a third side plate (31), two sets of adjusting assemblies (32) and two second cam bearings (33). The two sets of adjusting assemblies (32) are symmetrically installed on the third side plate (31). The two second cam bearings (33) are respectively installed on the bottom sides of the third side plate (31).

6. The apparatus of claim 5, wherein, The corner of the third side plate (31) is provided with a second groove (311), and the middle part is provided with a third through hole (312).

7. The apparatus of claim 5, wherein, The first cam bearing (24) of the sheet plate assembly (2) is rollingly matched with the first side plate (12) of the base assembly (1) and the third side plate (31) of the side plate assembly (3).

8. The apparatus of claim 5, wherein, The adjusting assembly (32) comprises a screw rod (321), a bolt (322) and a spring (323). The screw rod (321) passes through the first through hole (122). The bolt (322) is matched and fixed with the screw rod (321). The spring (323) is sleeved on the screw rod (321) and located between the bolt (322) and the first side plate (12).

9. The apparatus of claim 1, wherein, The pressing assembly (4) comprises a pressing plate (41) provided with a plurality of circular holes (411) in array, two cylinders (412) symmetrically arranged, and a fourth through hole (413) arranged in the middle.

10. The apparatus of claim 9, wherein, The pressing assembly (4) further comprises two pressing clamps (42) and two pushing clamps (43), wherein the pressing clamps (42) and the pushing clamps (43) are respectively installed on the outer side of the pressing plate (41).

Images