Clamp for positioning spot welding of barrel reinforcing ring and using method of clamp

Abstract

The invention discloses a fixture for positioning spot welding of a barrel reinforcing ring and a using method of the fixture, the fixture comprises an upper clamping piece, a lower clamping piece and a limiting piece, the upper clamping piece is connected with one end of the lower clamping piece, and the upper clamping piece is connected with one end of the limiting piece. The clamp can be used for positioned welding of the reinforcing ring of the cylinder part, the position of the reinforcing ring and the positioned welding quality can be guaranteed by adopting the clamp and the method, meanwhile, operation is convenient, the cost is reduced, and the cylinder for welding the reinforcing ring can meet the use requirement.

Description

Technical Field

[0001] This invention belongs to the field of welding engineering technology, and in particular relates to a fixture for positioning and spot welding of a cylindrical reinforcing ring and its usage method. Background Technology

[0002] For a certain cylindrical component, a reinforcing ring needs to be welded to the upper end of the cylinder using resistance spot welding. The cylindrical component has a large diameter and is made of titanium alloy. See Figure 4 As shown, the cylindrical body is also a welded structure. The cylindrical body is formed by connecting two longitudinal argon arc welds. Due to the requirements of subsequent processing, the reinforcing ring at the end of the cylindrical body assembly needs to maintain a certain angle with the longitudinal weld of the cylindrical body.

[0003] Because the fixtures for tack welding of such cylindrical parts are relatively large, costly, and not very precise, the common practice is to determine the position of the reinforcing ring by marking lines and then gradually perform tack welding. However, in practice, the marked lines may be reversed, leading to incorrect welding positions of the reinforcing ring. Furthermore, reinforcing rings without fixture positioning are difficult to fix, resulting in parts exceeding tolerances. Therefore, to ensure the welding position requirements of this part, an economical and simple tooling fixture and method are needed for tack welding of the reinforcing ring of this cylindrical part.

[0004] Patent application CN101716620A discloses a bending fixture for motor winding elements, featuring a right-angled pressure arm limiting structure and a base plate parallel to the pressure arm. The base plate is connected to the pressure arm via a support column, and the structure also includes an adjusting screw. However, the support column in this fixture interferes with the annular cylinder, making it unsuitable for clamping annular cylinders or annular objects overlapping with them. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a fixture for positioning and spot welding of a cylindrical reinforcing ring and its method of use.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides a fixture for positioning and spot welding of a cylindrical reinforcing ring, comprising an upper clamping plate, a lower clamping plate and a limiting plate, wherein one end of the upper clamping plate is connected to the lower clamping plate and the other end of the upper clamping plate is connected to the limiting plate.

[0008] Preferably, the upper clamping plate is provided with a positioning screw, a nut and a hole A, and the positioning screw passes through the nut and extends into the hole A to connect with the upper clamping plate.

[0009] Preferably, one end of the upper clamping piece is provided with a bent surface, so that the upper clamping piece is arranged in an L shape.

[0010] Preferably, the limiting piece is arc-shaped.

[0011] Preferably, one end of the limiting piece is connected to a baffle.

[0012] Preferably, the limiting piece and the baffle are welded together.

[0013] Preferably, the upper clamping piece and the lower clamping piece, as well as the upper clamping piece and the limiting piece, are all welded together.

[0014] Preferably, the upper clamping plate and the lower clamping plate are made of stainless steel.

[0015] A method for using a fixture for locating and spot welding a cylindrical reinforcing ring includes the following steps: S1: When assembling the reinforcing ring and the cylinder for tack welding, insert the upper end face of the cylinder between the upper and lower clamping plates of the fixture, and then clamp the reinforcing ring together onto the upper end face of the cylinder. Make the bent surface of the upper clamping plate close to the upper end face of the cylinder, and align the upper clamping plate with the longitudinal weld of the cylinder. S2: Adjust the reinforcing ring so that the aligned end face of the circumferential opening of the reinforcing ring is close to the baffle, and the axial upper end face of the reinforcing ring is close to the bent surface of the upper clamping plate, so that the reinforcing ring is flush with the axial end face of the cylinder. Then tighten the positioning screw to fix the reinforcing ring. S3: Weld the reinforcing ring to the cylinder body by resistance tack welding, and remove the fixture after tack welding.

[0016] The beneficial effects of this invention are as follows: The fixture of the present invention can be used for the positioning welding of reinforcing rings on cylindrical parts. Using this fixture and method can ensure the position of the reinforcing ring and the quality of the positioning weld, while facilitating operation, reducing costs, and ensuring that the cylindrical parts with welded reinforcing rings meet the usage requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 yes Figure 1 A schematic diagram of direction A; Figure 4 This is a schematic diagram of the connection between the cylinder and the reinforcing ring; In the figure: 1-Upper clamping plate, 2-Lower clamping plate, 3-Limiting plate, 4-Blocking plate, 5-Positioning screw, 6-Nut, 7-Cylinder body, 8-Reinforcing ring, 9-Alignment end face, 10-Longitudinal weld, 11-Alignment surface of upper clamping plate, 12-Hole A, 13-Bending surface. Detailed Implementation

[0018] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0019] Example: like Figures 1 to 4 As shown, a fixture for positioning and spot welding of a cylindrical reinforcing ring includes an upper clamping plate 1, a lower clamping plate 2, and a limiting plate 3. The upper clamping plate 1 is connected to the lower clamping plate 2 at one end, and the upper clamping plate 1 is connected to the limiting plate 3 at one end.

[0020] The clamping distance formed between the upper clamping plate 1 and the lower clamping plate 2 is similar to the total thickness (1.8mm) of the reinforcing ring 8 and the cylinder 7. The upper clamping plate 1 has a thickness of 2mm and the lower clamping plate 2 has a thickness of 1mm.

[0021] The curvature of the limiting piece 3 is similar to that of the cylinder 7, which has a curvature of 24.5°. The sum of its arc length and the width of the upper clamping piece 1 is 92 mm. The width at the connection between the limiting piece 3 and the upper limiting piece 1 is similar to the axial width of the reinforcing ring 8.

[0022] The upper clamping plate 1 is provided with a positioning screw 5, a nut 6, and a hole A12. The positioning screw 5 passes through the nut 6 and extends into the hole A12 to connect with the upper clamping plate 1. The positioning screw 5 is M6 and cooperates with the nut 6 of the upper clamping plate 1.

[0023] One end of the upper clamping piece 1 is provided with a bent surface 13, so that the upper clamping piece 1 is arranged in an L shape.

[0024] The limiting piece 3 is arc-shaped.

[0025] One end of the limiting piece 3 is connected to the baffle piece 4.

[0026] The limiting piece 3 and the baffle piece 4 are welded together.

[0027] The upper clamping piece 1 and the lower clamping piece 2, as well as the upper clamping piece 1 and the limiting piece 3, are all welded together.

[0028] The upper clamping plate 1 and the lower clamping plate 2 are made of stainless steel.

[0029] A method for using a fixture for locating and spot welding a cylindrical reinforcing ring includes the following steps: S1: When assembling the reinforcing ring 8 and the cylinder 7 for tack welding, insert the upper end face of the cylinder 7 between the upper clamping plate 1 and the lower clamping plate 2 of the fixture, and then clamp the reinforcing ring 8 together onto the upper end face of the cylinder 7. Make the bent surface 13 of the upper clamping plate 1 close to the upper end face of the cylinder 7, and align the upper clamping plate alignment surface 11 with the longitudinal weld 10 of the cylinder. S2: Adjust the reinforcing ring 8 so that the aligned end face 9 of the circumferential opening of the reinforcing ring 8 is close to the baffle 4, and the axial upper end face of the reinforcing ring 8 is close to the bent surface 13 of the upper clamping plate 1, so that the reinforcing ring 8 is flush with the axial end face of the cylinder 7, and then tighten the positioning screw 5 to fix the reinforcing ring 8. S3: Weld the reinforcing ring 8 to the cylinder 7 by resistance tack welding, and remove the fixture after tack welding.

[0030] This fixture is suitable for resistance spot welding and positioning welding of the upper end reinforcing ring of large-diameter cylindrical parts.

Claims

1. A cylinder stiffening ring positioning spot welding jig characterized by: Including upper clamping piece (1), lower clamping piece (2) and limiting piece (3), upper clamping piece (1) is connected with lower clamping piece (2) one end, upper clamping piece (1) is connected with limiting piece (3) one end.

2. A cylinder stiffening ring positioning spot welding fixture as defined in claim 1 wherein: The positioning screw (5) is inserted into the hole A (12) and connected with the upper clamping piece (1) after penetrating the nut (6).

3. A cylinder stiffening ring positioning spot weld fixture as defined in claim 1 wherein: The upper clamping piece (1) is provided with a bending surface (13) at one end, so that the upper clamping piece (1) is provided in L shape.

4. A cylinder stiffening ring positioning spot weld fixture as defined in claim 1 wherein: The limiting piece (3) is arc-shaped.

5. A cylinder stiffening ring positioning spot weld fixture as defined in claim 1 wherein: The limiting piece (3) is connected with the baffle (4) at one end.

6. A cylinder stiffening ring positioning spot weld fixture as defined in claim 5 wherein: The limiting piece (3) is welded with the baffle (4).

7. A cylinder ring positioning spot welding fixture as claimed in claim 1 wherein: The upper clamping piece (1) and the lower clamping piece (2), the upper clamping piece (1) and the limiting piece (3) are all welded.

8. A cylinder stiffening ring positioning spot weld fixture as described in claim 1 wherein: The material of the upper clamping piece (1) and the lower clamping piece (2) is stainless steel.

9. A method of using a cylinder ring positioning spot welding fixture according to any one of claims 1-8, characterized in that, Including steps: S1: when assembling the reinforcing ring (8) and the cylinder (7) for positioning welding, the upper end surface of the cylinder (7) is inserted between the upper clamping piece (1) and the lower clamping piece (2) of the clamp, then the reinforcing ring (8) is clamped on the upper end surface of the cylinder (7), the bending surface (13) of the upper clamping piece (1) is tightly attached to the upper end surface of the cylinder (7), and the alignment surface (11) of the upper clamping piece is aligned with the longitudinal weld (10) of the cylinder; S2: adjust the reinforcing ring (8), so that the alignment surface (9) of the circumferential opening of the reinforcing ring (8) is tightly attached to the baffle (4), the axial upper end surface of the reinforcing ring (8) is tightly attached to the bending surface (13) of the upper clamping piece (1), so that the reinforcing ring (8) is flush with the axial end surface of the cylinder (7), then tighten the positioning screw (5) to fix the reinforcing ring (8); S3: the reinforcing ring (8) and the cylinder (7) are welded by resistance positioning welding, and the clamp is removed after positioning welding.

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