Welding fixture for thin-wall bent pipe part

Abstract

The utility model relates to the technical field of welding fixtures, in particular to a welding fixture for thin-wall bent pipe parts, which comprises a bottom plate and a thin-wall bent pipe, a lower support disc is fixedly arranged on the upper end face of the bottom plate, an arc-shaped support positioning block is welded at the center of the lower support disc, and the thin-wall bent pipe is sleeved on the outer wall of the arc-shaped support positioning block. According to the device, the thin-wall bent pipe can be clamped and fixed through the bottom plate, the arc-shaped clamping plate and the baffle, and the thin-wall bent pipe can be supported through the upper supporting disc and the lower supporting disc which are evenly arranged on the inner wall of the thin-wall bent pipe and located at the two ends of the thin-wall bent pipe; and the thin-wall bent pipe is supported more comprehensively and uniformly.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, and in particular to a welding fixture for thin-walled bent pipe parts. Background Technology

[0002] Welding of wall panel parts presents challenges such as easy deformation during welding, difficulty in positioning, and resulting in unstable welded structures and inconsistent weld quality. Furthermore, a core issue in welding is the clamping and positioning of several welded parts. Therefore, welding work typically requires specialized auxiliary fixtures for clamping and positioning. Welding parameters must also be considered to prevent issues like incomplete penetration and inconsistent quality. An existing welding fixture for thin-walled bent pipe parts (application number CN202010374815.1) consists of a base plate, two T-shaped vertical plates, side plates, a first positioning sleeve semi-ring, a second positioning sleeve semi-ring, a third positioning sleeve, a lower curved support positioning block, an upper curved support positioning block, four sets of first adjustable pressure block assemblies, and two sets of second adjustable pressure block assemblies… It can be used to support and position thin-walled bent pipe parts with poor rigidity, significantly improving the welding quality of thin-walled parts. However, this fixture only supports the inner walls of the thin-walled bent pipe parts on both sides through the lower and upper curved support positioning blocks, and cannot support the left and right sides, resulting in insufficient support. Utility Model Content

[0003] The purpose of this utility model is to solve the shortcomings of the existing technology, which cannot support the left and right sides and has insufficient support, and to propose a welding fixture for thin-walled bent pipe parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A welding fixture for thin-walled bent pipe parts is designed, including a base plate and a thin-walled bent pipe. A lower support plate is fixed on the upper end surface of the base plate, and an arc-shaped support positioning block is welded at the center of the lower support plate. The thin-walled bent pipe is sleeved on the outer wall of the arc-shaped support positioning block, and the lower end of the thin-walled bent pipe is sleeved outside the lower support plate. A support ring is slidably provided on the inner wall of the thin-walled bent pipe, and the inner wall of the support ring is slidably connected to the outer wall of the arc-shaped support positioning block through a sliding connection structure. A folded compression hose is bonded between two adjacent support rings, and the leftmost support ring is connected to a piston plate slidably set on the arc-shaped support positioning block through the folded compression hose. The left end of the arc-shaped support positioning block is fixedly connected to the upper end of the thin-walled bent pipe through an upper fixing structure. An air pipe is provided inside the base plate, and the inner end of the air pipe passes through the lower support plate and extends into the lowermost folded compression hose. The outer end of the air pipe is connected to an air pump.

[0006] Preferably, the sliding connection structure includes an arc-shaped guide sleeve and a support rod. The outer wall of the arc-shaped support positioning block is fitted with a plurality of arc-shaped guide sleeves, and the outer wall of each arc-shaped guide sleeve is welded with a set of support rods arranged in a circumferential array. The outer end of each set of support rods is fixedly connected to a support ring.

[0007] Preferably, the outer wall of the arc-shaped support positioning block is provided with an arc-shaped limiting groove, and a limiting slider is slidably provided inside the arc-shaped limiting groove, and the inner wall of the arc-shaped guide sleeve is fixedly connected to the limiting slider.

[0008] Preferably, the upper fixing structure includes a screw, a baffle, an upper support plate, and a clamping structure. The left end of the arc-shaped support positioning block is integrally formed with a screw. The outer wall of the screw is threadedly connected to the upper support plate and the baffle. The right end face of the baffle and the outer wall of the upper support plate respectively abut against the left end and the inner wall of the thin-walled bent pipe. The right end face of the baffle is fixed with a clamping structure.

[0009] Preferably, the clamping structure includes a vertical plate, an arc-shaped clamping plate, and screws. A plurality of vertical plates arranged in a circular array are fixed on the right end face of the baffle, and the inner end face of the vertical plate is connected to an arc-shaped clamping plate covering the upper end of the thin-walled bent pipe through a guide structure. The side of the vertical plate is provided with a threaded hole, and a screw is threaded into the threaded hole. The inner end of the screw abuts against the arc-shaped clamping plate.

[0010] Preferably, the guide structure includes a guide rod and a retaining ring. The side of the upright plate has a pair of through holes located on both sides of the screw, and the guide rod is inserted into the through holes. The inner end of the guide rod is fixedly connected to an arc-shaped clamping plate, and the outer end of the guide rod is fixedly provided with a retaining ring.

[0011] Preferably, the outer wall of the guide rod is fitted with an elastic rubber sleeve, and the two ends of the elastic rubber sleeve abut against the retaining ring and the upright plate, respectively.

[0012] The present invention proposes a welding fixture for thin-walled bent pipe parts, which has the following advantages: the device can not only clamp and fix the thin-walled bent pipe through the base plate, the arc-shaped clamping plate and the baffle, but also can support the thin-walled bent pipe more comprehensively and evenly through the upper support plate and the lower support plate located at both ends of the thin-walled bent pipe on the inner wall of the thin-walled bent pipe. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a welding fixture for a thin-walled bent pipe part proposed in this utility model;

[0014] Figure 2 This is an enlarged view of area A of a welding fixture for a thin-walled bent pipe part proposed in this utility model;

[0015] Figure 3This is a cross-sectional structural diagram of a welding fixture for a thin-walled bent pipe part proposed in this utility model.

[0016] Figure 4 This is an enlarged view of area B of a welding fixture for a thin-walled bent pipe part proposed in this utility model;

[0017] Figure 5 This is an enlarged view of area C of a welding fixture for a thin-walled bent pipe part proposed in this utility model.

[0018] In the diagram: 1. Base plate; 2. Baffle; 3. Screw; 4. Vertical plate; 5. Arc-shaped clamp; 6. Thin-walled bent pipe; 7. Elastic rubber sleeve; 8. Guide rod; 9. Screw; 10. Retaining ring; 11. Lower support plate; 12. Air pipe; 13. Arc-shaped support positioning block; 14. Arc-shaped limiting groove; 15. Support connecting rod; 16. Folded compression hose; 17. Support ring; 18. Arc-shaped guide sleeve; 19. Limiting slider. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-5 A welding fixture for a thin-walled bent pipe part includes a base plate 1 and a thin-walled bent pipe 6. A lower support plate 11 is fixedly mounted on the upper end face of the base plate 1, and an arc-shaped support positioning block 13 is welded to the center of the lower support plate 11. The thin-walled bent pipe 6 is sleeved on the outer wall of the arc-shaped support positioning block 13, and the lower end of the thin-walled bent pipe 6 is sleeved outside the lower support plate 11. A support ring 17 is slidably mounted on the inner wall of the thin-walled bent pipe 6, and the inner wall of the support ring 17 is slidably connected to the arc-shaped support positioning block 13 through a sliding connection structure. On the outer wall, a folded compression hose 16 is bonded between two adjacent support rings 17, and the leftmost support ring 17 is connected to a piston plate that is slidably set on the arc-shaped support positioning block 13 through the folded compression hose 16. The left end of the arc-shaped support positioning block 13 is fixedly connected to the upper end of the thin-walled bent pipe 6 through the upper end fixing structure. An air pipe 12 is provided inside the bottom plate 1, and the inner end of the air pipe 12 passes through the lower support plate 11 and extends into the lowermost folded compression hose 16. The outer end of the air pipe 12 is connected to the air pump.

[0021] Reference Figure 1-5 In order for the arc-shaped support positioning block 13 to support the sliding support ring 17, the sliding connection structure includes an arc-shaped guide sleeve 18 and a support connecting rod 15. The outer wall of the arc-shaped support positioning block 13 is fitted with several arc-shaped guide sleeves 18, and a set of support connecting rods 15 arranged in a circumferential array is welded to the outer wall of each arc-shaped guide sleeve 18. The outer end of each set of support connecting rods 15 is fixedly connected to the support ring 17.

[0022] Reference Figure 1-5 To prevent the support ring 17 from rotating, an arc-shaped limiting groove 14 is provided on the outer wall of the arc-shaped support positioning block 13, and a limiting slider 19 is slidably provided inside the arc-shaped limiting groove 14. The limiting slider 19 is fixedly connected to the inner wall of the arc-shaped guide sleeve 18.

[0023] Reference Figure 1-5 In order to block the left end of the thin-walled bend 6 and provide internal support for the upper end of the thin-walled bend 6, the upper fixed structure includes a screw 3, a baffle 2, an upper support plate, and a clamping structure. The left end of the arc-shaped support positioning block 13 is integrally formed with a screw 3. The outer wall of the screw 3 is threadedly connected to the upper support plate and the baffle 2. The right end face of the baffle 2 and the outer wall of the upper support plate abut against the left end and the inner wall of the thin-walled bend 6, respectively. The right end face of the baffle 2 is fixed with a clamping structure.

[0024] Reference Figure 1-5 In order to fix the left end of the thin-walled bent pipe 6 to the upper support plate, the clamping structure includes a vertical plate 4, an arc-shaped clamping plate 5, and a screw 9. Several vertical plates 4 arranged in a circular array are fixed on the right end face of the baffle 2, and the inner end face of the vertical plate 4 is connected to the arc-shaped clamping plate 5 covering the upper end of the thin-walled bent pipe 6 through a guide structure. The side of the vertical plate 4 is provided with a threaded hole, and the screw 9 is threaded into the threaded hole. The inner end of the screw 9 abuts against the arc-shaped clamping plate 5.

[0025] Reference Figure 1-5 In order to allow the arc-shaped clamping plate 5 to slide inside the upright plate 4, the guide structure includes a guide rod 8 and a retaining ring 10. A pair of through holes located on both sides of the screw 9 are opened on the side of the upright plate 4, and the guide rod 8 is inserted into the through holes. The inner end of the guide rod 8 is fixedly connected to the arc-shaped clamping plate 5, and the outer end of the guide rod 8 is fixedly provided with a retaining ring 10.

[0026] Reference Figure 1-5 In order to enable the arc-shaped clamp 5 to return to its original position after the screw 9 is unscrewed, the outer wall of the guide rod 8 is fitted with an elastic rubber sleeve 7, and the two ends of the elastic rubber sleeve 7 abut against the retaining ring 10 and the upright plate 4 respectively.

[0027] Working principle: After the thin-walled bent tube 6 is fitted onto the arc-shaped support positioning block 13 and the lower support plate 11, the upper support plate is rotated into the thin-walled bent tube 6, and the baffle 2 is rotated to abut against the thin-walled bent tube 6. Then, the air pump injects gas into the folded compression hose 16 through the air pipe 12, causing the folded compression hose 16 to bend and elongate, and drive the support ring 17 to slide until the support ring 17 is evenly distributed on the inner wall of the thin-walled bent tube 6. The arc-shaped guide sleeve 18 slides synchronously and is evenly fitted onto the arc-shaped support positioning block 13.

[0028] This device can not only clamp and fix the thin-walled bend 6 through the base plate 1, the arc-shaped clamping plate 5 and the baffle 2, but also support the thin-walled bend 6 evenly on the inner wall of the thin-walled bend 6 and at both ends of the thin-walled bend 6 through the upper support plate and the lower support plate 11, which provide more comprehensive and uniform support for the thin-walled bend 6.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for a thin-walled bent pipe part, comprising a base plate (1) and a thin-walled bent pipe (6), characterized in that, A lower support plate (11) is fixedly mounted on the upper end surface of the base plate (1), and an arc-shaped support positioning block (13) is welded to the center of the lower support plate (11). A thin-walled bent tube (6) is fitted on the outer wall of the arc-shaped support positioning block (13), and the lower end of the thin-walled bent tube (6) is fitted outside the lower support plate (11). A support ring (17) is slidably mounted on the inner wall of the thin-walled bent tube (6), and the inner wall of the support ring (17) is slidably connected to the outer wall of the arc-shaped support positioning block (13) through a sliding connection structure. Between two adjacent support rings (17) A folded compression hose (16) is bonded to the leftmost support ring (17), which is connected to a piston plate slidably mounted on an arc-shaped support positioning block (13) via the folded compression hose (16). The left end of the arc-shaped support positioning block (13) is fixedly connected to the upper end of a thin-walled bent pipe (6) via an upper end fixing structure. An air pipe (12) is provided inside the base plate (1), and the inner end of the air pipe (12) passes through the lower support plate (11) and extends into the lowermost folded compression hose (16). The outer end of the air pipe (12) is connected to an air pump.

2. The welding fixture for a thin-walled bent pipe part according to claim 1, characterized in that, The sliding connection structure includes an arc-shaped guide sleeve (18) and a support rod (15). The outer wall of the arc-shaped support positioning block (13) is fitted with several arc-shaped guide sleeves (18), and a set of support rods (15) arranged in a circumferential array are welded to the outer wall of each arc-shaped guide sleeve (18). The outer end of each set of support rods (15) is fixedly connected to a support ring (17).

3. The welding fixture for a thin-walled bent pipe part according to claim 2, characterized in that, The outer wall of the arc-shaped support positioning block (13) is provided with an arc-shaped limiting groove (14), and a limiting slider (19) is slidably provided inside the arc-shaped limiting groove (14). The inner wall of the arc-shaped guide sleeve (18) is fixedly connected to the limiting slider (19).

4. The welding fixture for a thin-walled bent pipe part according to claim 1, characterized in that, The upper fixing structure includes a screw (3), a baffle (2), an upper support plate, and a clamping structure. The left end of the arc-shaped support positioning block (13) is integrally formed with a screw (3). The outer wall of the screw (3) is threadedly connected to the upper support plate and the baffle (2). The right end face of the baffle (2) and the outer wall of the upper support plate abut against the left end and inner wall of the thin-walled bent pipe (6), respectively. The right end face of the baffle (2) is fixed with a clamping structure.

5. The welding fixture for a thin-walled bent pipe part according to claim 4, characterized in that, The clamping structure includes a vertical plate (4), an arc-shaped clamping plate (5), and a screw (9). The right end face of the baffle (2) is fixed with a plurality of vertical plates (4) arranged in a circular array. The inner end face of the vertical plate (4) is connected to the arc-shaped clamping plate (5) covering the upper end of the thin-walled bent pipe (6) through a guide structure. The side of the vertical plate (4) is provided with a threaded hole, and a screw (9) is threaded into the threaded hole. The inner end of the screw (9) abuts against the arc-shaped clamping plate (5).

6. The welding fixture for a thin-walled bent pipe part according to claim 5, characterized in that, The guide structure includes a guide rod (8) and a retaining ring (10). The side of the upright plate (4) is provided with a pair of through holes located on both sides of the screw (9), and the guide rod (8) is inserted into the through holes. The inner end of the guide rod (8) is fixedly connected to an arc-shaped clamping plate (5), and the outer end of the guide rod (8) is fixedly provided with a retaining ring (10).

7. The welding fixture for a thin-walled bent pipe part according to claim 6, characterized in that, The outer wall of the guide rod (8) is fitted with an elastic rubber sleeve (7), and the two ends of the elastic rubber sleeve (7) abut against the retaining ring (10) and the upright plate (4) respectively.

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