Thin-wall cylinder welding positioning device
By designing a thin-walled cylinder welding positioning device including a core shaft, a cone, an annular expansion block and a copper plate, the deformation and dislocation problems during thin-walled cylinder welding are solved, and the welding accuracy is improved and the product quality is stable.
Patent Information
- Application Number
- CN202422507628.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-17
AI Technical Summary
Welding deformation and welding misalignment are prone to occur when welding thin-walled cylinders. Conventional expansion and centering fixtures are not suitable for cylinders with a length-to-diameter ratio of 1:16, resulting in unqualified welding accuracy.
A thin-walled cylinder welding positioning device is used, including components such as a core shaft, a cone, an annular expansion block, a copper plate, and a gland nut. The expansion block is expanded into three petals by applying uniform pressure, and the weld position is fixed in combination with a second core shaft and a pressure plate to ensure welding accuracy.
Effectively prevent welding misalignment and deformation, ensure accurate weld position, and improve welding quality and product precision.
Smart Images
Figure CN223418761U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of welding devices, and in particular relates to a thin-walled cylinder welding positioning device. Background Art
[0002] When butt welding thin-walled cylinders, welding deformation and misalignment can easily lead to substandard product precision or even scrap. Currently, the more common expansion and centering fixtures are not suitable for cylinders with an aspect ratio of 1:16. When welding products with an aspect ratio that large, the misalignment of parts can easily occur. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a thin-walled cylinder welding positioning device with a simple structure.
[0004] The technical solution of the utility model to solve the above technical problems is: a thin-walled cylinder welding positioning device,
[0005] It includes a core shaft, a cone is fixed on the core shaft, an annular expansion block is provided on the cone, a copper plate is provided on the outside of the expansion block, the side of the expansion block contacts the gland, and the gland contacts the gland nut; a pressure plate is provided on the other side of the gland nut, and the pressure plate is fixed by the pressure plate nut;
[0006] Furthermore, a radial annular groove is designed on the outer circumference of the copper plate.
[0007] Furthermore, the expansion block is annular and is equally divided into 4-6 blocks.
[0008] The technical effect of the utility model is that the utility model presses the end face of the pressure cover with the pressure cover nut to apply uniform pressure to make the expansion block open in a three-petal shape to the inside of the long cylinder, and then puts the second pressure plate into the stop position of the cylinder body through the second core shaft, tightens the second nut, and determines that the position of the copper plate molten welding groove fixed by the screw on the outer surface of the expansion block and the weld position between the head and the inner wall of the cylinder body are correct, ensuring that the molten welding groove position will not be offset and the welding will not be unable to penetrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural diagram of the cone assembly in the utility model.
[0010] Figure 2 It is a structural diagram of the present utility model.
[0011] Figure 3 It is a schematic diagram of the cylinder girth welding of the utility model.
[0012] Figure 4 It is a structural schematic diagram of the copper plate in this utility model. DETAILED DESCRIPTION
[0013] The utility model makes further detailed description in connection with the drawings and specific embodiments.
[0014] Referring to Figure 1-4 , the utility model discloses first mandrel 1, shoulder nut 2, first pressure plate 3, gland nut 4, gland 5, bulge block 6, red copper plate 7, cone 8, second mandrel 9, second pressure plate 10, second nut 11, pin shaft 12, split pin 13, screw 14, the utility model utilizes the axial pressure of gland nut 4 to be delivered to the gland 5, make and cooperate the bulge block 6 of cone and show three petal type and open, and the inner hole of workpiece that is to be welded is tightly fastened and centered by bulging, and the taper of the inner wall of bulge block 6 and the taper of the outer surface of cone are same, design a radial annular groove at the outer circle of red copper plate 7, as shown in Figure 4 , can effectively solve the situation that it is difficult to weld through when welding. The fixture solves the deformation and eccentricity problem of conventional welding as a whole.
[0015] The cone assembly device is composed of second mandrel 1, cone 8, second mandrel 9, the hollow mandrel of cone 8 is connected with cone and is welded, the mandrel of cone 8 is connected with second mandrel 9 through pin shaft 12, and the assembly state is shown in Figure 1 .
[0016] The inner taper surface of bulge block 6 is matched with the outer taper surface of cone 8, then the gland 5 is sleeved into first mandrel 1, the end surface of gland 5 is pressed tightly through the pressure of gland nut 4 to make bulge block 6 show three petal type and open to the inside of long cylinder, the bulge block is annular and is equally divided into 4-6 blocks, then second pressure plate 10 is placed into the stop opening position of cylinder body through second mandrel 9, and second nut 11 is screwed, the position of the outer surface of bulge block 6 is fixed by screw 14, the position of red copper plate 7 welding groove and the position of the weld between head and cylinder inner wall are correct, so that the phenomenon that welding groove position deviates and welding is not penetrated is avoided.
[0017] The gland nut 4 is screwed to apply pressure to bulge block 6, and the bulge block is opened through the action of cone 8, so that the head and cylinder are concentric and tightly bulged. Finally, the first pressure plate 3 is assembled at the head stop opening, the head is fixed at the front end of first pressure plate 3, the shoulder nut 2 is screwed, a relative force is generated on second nut 11, so that the head and cylinder are axially closely matched and clamped. The cylinder and fixture device are placed as a whole on the argon arc welding center frame to carry out table correction, so that the welding position is correct, and the misalignment phenomenon is prevented. As shown in Figure 3 , the utility model utilizes the bulging inner support principle when welding, so that it can be welded not only when the head end is open but also when the head end is closed, welding defects such as misalignment and deformation are effectively avoided, and the assembly is stable and reliable.
Claims
1. A thin-walled cylinder welding positioning device, characterized in that: It includes a core shaft, a cone is fixed on the core shaft, an annular expansion block is provided on the cone, a copper plate is provided on the outside of the expansion block, the side of the expansion block contacts the pressure cover, and the pressure cover contacts the pressure cover nut; a pressure plate is provided on the other side of the pressure cover nut, and the pressure plate is fixed with the pressure plate nut.
2. The thin-walled cylinder welding positioning device according to claim 1, characterized in that: A radial annular groove is designed on the outer circumference of the copper plate.
3. The thin-walled cylinder welding positioning device according to claim 1, characterized in that: The expansion block is annular and is equally divided into 4-6 blocks.