A container groove weld structure
Patent Information
- Application Number
- CN202521985598.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-09-15
AI Technical Summary
[0014] Compared with existing technologies, the welding structure of this utility model has semi-U+V shaped bevels on the welding edges of the end cap and the cylinder. The cross-sectional shape of the bevel includes a straight bevel edge and a circular arc bottom connected in sequence. The straight bevel edge forms a V-shaped edge, and the circular arc bottom forms a U-shaped half-bottom. Thus, during welding, the semi-U+V shaped bevels of the end cap and the cylinder are joined to form a U+V shaped bevel weld. The U+V shaped bevel weld combines the characteristics of U-shaped and V-shaped bevels: the U+V shaped bevel weld requires less filler metal, which can save welding materials and reduce costs; its bevel shape makes the welding heat distribution relatively uniform, thereby reducing welding residual stress and the degree of deformation; although the processing difficulty is relatively higher, it can reduce the number of welding layers and welding time to a certain extent, and improve welding efficiency; it is conducive to the penetration of the weld root, improves the quality of the weld and the strength of the joint, and ensures the welding quality. Simultaneously, lower welding voltage and current can be selected during welding to control the welding heat input and reduce welding deformation. The weld formation is aesthetically pleasing and defect-free, with a smooth and flat surface, small and uniform reinforcement height, and moderate and uniform width. X-ray inspection is used to check the internal quality of the weld, revealing no defects such as porosity, slag inclusions, or incomplete penetration. This ensures the welding quality between the cylinder and the head, improves the weld strength and sealing performance, and meets the higher quality requirements of sealed containers.
Smart Images
Figure CN224750307U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding auxiliary technology, specifically to a container beveling welding structure. Background Technology
[0002] A typical container structure consists of end caps 1 at both ends and a central cylinder 2. During container manufacturing, the end caps 1 and the cylinder 2 are connected by welding. Current methods employ beveling, where a bevel is a sloping or curved surface machined at the joint of the workpiece. This increases the root space, allowing the heat source to penetrate deeper into the welding area. Beveling is a crucial process for connecting various components of a container, and its welding quality directly affects the container's structural strength, sealing performance, and service life. A suitable beveling shape provides sufficient space for the weld pool, ensuring the filler metal and base metal fuse fully to form a strong bond. An improper beveling shape, such as an excessively small beveling angle or insufficient beveling depth, can lead to poor fusion between the filler metal and base metal, resulting in defects such as incomplete fusion and slag inclusions, severely impacting the weld strength and sealing performance. Sealed containers place higher demands on welding quality, and existing beveling techniques cannot meet the requirements for weld strength and sealing performance. Utility Model Content
[0003] To address the problems in the existing technology, this utility model provides a container bevel welding structure that combines the advantages of U-shaped and V-shaped bevels when welding the cylinder and the end cap, ensuring the welding quality between the cylinder and the end cap and improving the strength and sealing of the weld.
[0004] To achieve the above objectives, this utility model provides a container bevel welding structure. The container includes a head and a cylinder. The container bevel welding structure includes semi-U+V shaped bevels respectively provided at the welding positions of the head and the cylinder. When the head and the cylinder are welded together, the semi-U+V shaped bevels of the head and the cylinder are joined to form a U+V shaped bevel weld. The gap between the head and the cylinder is 0-0.3mm. The cross-sectional shape of the bevel includes a bevel edge and a bevel bottom connected in sequence. The bevel edge is straight, and the bevel bottom is arc-shaped.
[0005] Furthermore, the bottom of the slope is a blunt edge, which has a gradually changing size that matches the arc of the slope and is connected to the end cap or the wall of the cylinder.
[0006] Furthermore, the thickness t2 of the blunt edge is 1 to 1.2 mm.
[0007] Furthermore, the arc at the bottom of the slope extends upward from the edge of the blunt side.
[0008] Furthermore, the radius R of the arc at the bottom of the slope is 2.5 ± 0.1 mm.
[0009] Furthermore, the slope extends from the arc at the bottom of the slope to the outer surface of the end cap or the cylinder.
[0010] Furthermore, the angle α1 of the slope relative to the radial direction is 30±1°.
[0011] Furthermore, the straight line of the slope edge and the arc of the slope bottom are tangentially connected.
[0012] Furthermore, the end cap is open at one end, and the cylinder is hollow with open ends. The end cap includes a connected arc segment and a straight segment. The straight segment is connected to the cylinder, and the slope bottom is located at the connecting edge of the straight segment and the cylinder.
[0013] Furthermore, the wall thickness t1 of the end cap and the wall thickness t3 of the cylinder are 6.55±0.25mm, and the inner diameter deviation of the welded end cap and the cylinder is less than 0.1mm.
[0014] Compared with existing technologies, the welding structure of this utility model has semi-U+V shaped bevels on the welding edges of the end cap and the cylinder. The cross-sectional shape of the bevel includes a straight bevel edge and a circular arc bottom connected in sequence. The straight bevel edge forms a V-shaped edge, and the circular arc bottom forms a U-shaped half-bottom. Thus, during welding, the semi-U+V shaped bevels of the end cap and the cylinder are joined to form a U+V shaped bevel weld. The U+V shaped bevel weld combines the characteristics of U-shaped and V-shaped bevels: the U+V shaped bevel weld requires less filler metal, which can save welding materials and reduce costs; its bevel shape makes the welding heat distribution relatively uniform, thereby reducing welding residual stress and the degree of deformation; although the processing difficulty is relatively higher, it can reduce the number of welding layers and welding time to a certain extent, and improve welding efficiency; it is conducive to the penetration of the weld root, improves the quality of the weld and the strength of the joint, and ensures the welding quality. Simultaneously, lower welding voltage and current can be selected during welding to control the welding heat input and reduce welding deformation. The weld formation is aesthetically pleasing and defect-free, with a smooth and flat surface, small and uniform reinforcement height, and moderate and uniform width. X-ray inspection is used to check the internal quality of the weld, revealing no defects such as porosity, slag inclusions, or incomplete penetration. This ensures the welding quality between the cylinder and the head, improves the weld strength and sealing performance, and meets the higher quality requirements of sealed containers. Attached Figure Description
[0015] Figure 1 This is a structural diagram of the end cap;
[0016] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0017] Figure 3 This is a schematic diagram of the cylinder structure;
[0018] Figure 4 This is a structural diagram of the welding bevel when the end cap and the cylinder are joined together;
[0019] Wherein, 1 is the end cap, 2 is the cylinder, 3 is the bevel, 301 is the bevel edge, 302 is the bevel bottom, 303 is the blunt edge, H1 is the inner cavity height of the straight section of the end cap, H2 is the inner cavity height of the arc section of the end cap, t1 is the wall thickness of the end cap, φ1 is the inner diameter of the straight section of the end cap, α1 is the angle of the bevel edge relative to the radial direction, R is the radius of the bevel bottom, t2 is the thickness of the blunt edge, L is the length of the cylinder, φ2 is the inner diameter of the cylinder, t3 is the wall thickness of the cylinder, and α is the included angle between the two bevel edges of the bevel. Detailed Implementation
[0020] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] This utility model provides a container bevel welding structure, see details below. Figure 1 , Figure 2 , Figure 3 and Figure 4 The container includes a head 1 and a cylinder 2. The container bevel welding structure includes a semi-U+V shaped bevel 3 set at the welding positions of the head 1 and the cylinder 2 respectively. When the head 1 and the cylinder 2 are welded together, the semi-U+V shaped bevel 3 of the head 1 and the semi-U+V shaped bevel 3 of the cylinder 2 are joined to form a U+V shaped bevel weld. The cross-sectional shape of the bevel 3 includes a bevel edge 301 and a bevel bottom 302 connected in sequence. The bevel edge 301 is straight and the bevel bottom 302 is arc-shaped.
[0022] In this embodiment of the invention, the welding structure features semi-U+V shaped bevels 3 on the welding edges of the end cap 1 and the cylinder 2. The cross-sectional shape of the bevel 3 includes a straight bevel edge 301 and a circular arc bottom 302 connected in sequence. The straight bevel edge 301 forms a V-shaped edge, and the circular arc bottom 302 forms a U-shaped half-bottom. Thus, during welding, the end cap 1 and the cylinder 2 form a U+V shaped bevel weld by joining the semi-U+V shaped bevels 3. The U+V shaped bevel weld combines the characteristics of both U-shaped and V-shaped bevels: the U+V shaped bevel weld requires less filler metal, saving welding materials and reducing costs; its bevel shape ensures a relatively uniform distribution of welding heat, thereby reducing residual welding stress and minimizing deformation; although the processing difficulty is relatively higher, it can reduce the number of welding layers and welding time to a certain extent, improving welding efficiency; it is beneficial for the penetration of the weld root, improving the quality of the weld and the strength of the joint, and ensuring welding quality. Simultaneously, lower welding voltage and current can be selected during welding to control the welding heat input and reduce welding deformation. The weld formation is aesthetically pleasing and defect-free, with a smooth and flat surface, small and uniform reinforcement height, and moderate and uniform width. X-ray inspection is used to check the internal quality of the weld, revealing no defects such as porosity, slag inclusions, or incomplete penetration. This ensures the welding quality between cylinder 2 and head 1, improves the weld strength and sealing performance, and meets the higher quality requirements of sealed containers.
[0023] The container of this utility model embodiment includes end caps 1 at both ends and a cylindrical body 2 between the two end caps 1. The end caps 1 are open at one end, and the cylindrical body 2 is hollow with open ends. In this embodiment, the cylindrical body 2 is a hollow cylindrical tube. The end caps 1 include a connecting arc segment and a straight segment. The straight segment is connected to the cylindrical body 2. The slope bottom 302 is provided at the connecting edge of the straight segment and the cylindrical body 2. The wall thickness t1 of the end caps 1 and the wall thickness t3 of the cylindrical body 2 are 6.55±0.25mm. The inner cavity height H1 of the straight section of end cap 1 is 20±0.05mm, and the inner cavity height H2 of the arc section of end cap 1 is 32±0.05mm, which is the maximum height of the inner cavity of the arc section. The inner diameter φ1 of the straight section of end cap 1 is 128±0.2mm. The length L of the cylinder 2 is 637±0.2mm, and the inner diameter φ2 of the cylinder 2 is 128±0.2mm. The surface roughness of both the outer surface and the inner cavity surface of end cap 1 and cylinder 2 is guaranteed to be 1.6. The inner diameter deviation of the welded end cap 1 and cylinder 2 is less than 0.1mm, thus ensuring the quality of the finished product. Of course, in other embodiments, cylinder 2 can also be a variable diameter cylinder structure, and end cap 1 can also be other shapes that are suitable for it. The welding structure of this embodiment has wide applicability and is not limited to the shapes of end cap 1 and cylinder 2 given in this embodiment.
[0024] Specifically, the bottom of the slope bottom 302 is a blunt edge 303. The blunt edge 303 has a gradually changing size that matches the arc of the slope bottom 302 and connects to the wall of the end cap 1 or the cylinder 2. That is, the bevel 3 is set at the end edge of the end cap 1 and the cylinder 2. The cross-sectional shape of the bevel 3 extends inward from the outer surface of the end edge of the end cap 1 and the cylinder 2 to the side edge of the blunt edge 303. The thickness t2 of the blunt edge 303 is 1 to 1.2 mm. The thickness t2 of the blunt edge 303 refers to the thickness of the blunt edge 303 at the very bottom of the slope bottom 302, that is, the minimum thickness of the blunt edge 303. In this embodiment, it refers to the thickness corresponding to the straight edge of the blunt edge 303. The setting of the blunt edge 303 and the selection of its thickness prevent burn-through during welding, while retaining a straight edge with a thickness of 1 to 1.2 mm to ensure root fusion of the weld, balancing the dual requirements of preventing burn-through and penetration.
[0025] More specifically, the arc of the slope bottom 302 extends upward from the edge of the blunt edge 303, that is, the arc transitions obliquely upward from the straight edge of the blunt edge 303. The radius R of the arc of the slope bottom 302 is 2.5±0.1mm. The arc of the slope bottom 302 forms a curved surface structure with rounded bottom corners, thus providing sufficient space for welding material to be contained during welding, forming a molten pool, enhancing the fluidity of the welding material, improving the utilization rate and penetration of the welding material, improving the bonding strength between the welding material and the head 1 and the cylinder 2, and improving the welding quality.
[0026] More specifically, the bevel edge 301 extends from the arc of the slope bottom 302 to the outer surface of the head 1 or the cylinder 2. The angle α1 of the bevel edge 301 relative to the radial direction is 30±1°, where the radial direction is perpendicular to the axis of the container. The straight bevel edge 301 forms a single-sided inclined structure. The selection of the included angle can control the heat input during welding, and at the same time, it is beneficial to the melting of the welding material and the melting out of bubbles, slag inclusions, etc., which helps to improve the welding quality, enhance the welding strength and airtightness. In addition, the straight line of the bevel edge 301 and the arc of the slope bottom 302 are tangentially transitioned. This improves the uniform and smooth transition between the bevel edge 301 and the slope bottom 302, enabling the welding material to reliably melt and weld within the U+V shaped groove weld, and improving the bonding strength between the welding material and the head 1 and the cylinder 2.
[0027] In this embodiment, when the end cap 1 and the bevel 3 of the cylinder 2 are fixedly connected, the connection gap is reliably guaranteed to be 0-0.3mm. The end cap 1 and the half U+V bevel 3 of the cylinder 2 are connected to form a U+V bevel weld. The included angle α between the two opposite bevel edges 301 of the bevel weld is 60±2°. The two bevel bottoms 302 form an arc with a diameter R of 2.5±0.1mm. The straight lines of the two bevel bottoms 302 are tangent to the arcs and transition to the arcs. The straight edges of the two blunt edges 303 are tightly fitted and reliably connected.
[0028] This utility model embodiment also provides a container bevel welding method based on the above-described container bevel welding structure, including the following steps:
[0029] (1) A semi-U+V shaped bevel 3 is made at the welding parts of the head 1 and the cylinder 2 respectively;
[0030] (2) Fix the end cap 1 and the cylinder 2 together with a gap of 0 to 0.3 mm. The half U+V bevel 3 of the end cap 1 and the cylinder 2 are joined to form a U+V bevel weld.
[0031] (3) Weld at the bevel weld to complete the container bevel welding.
[0032] The method specifically employs tungsten inert gas (GTAW) welding. Welding is initiated approximately 2 minutes after argon gas protection. Other welding processes can also be used, depending on the desired weld quality. In this embodiment, the container bevel welding structure utilizes the semi-U+V bevel 3 of the end cap 1 and the cylinder 2 to form a U+V bevel weld. Compared to simple U-shaped or V-shaped welds, this method requires less filler metal, saving welding materials and reducing costs. The bevel shape ensures relatively uniform heat distribution, reducing residual stress and deformation. It also reduces the number of welding layers and welding time, improving welding efficiency. Furthermore, it promotes root penetration, enhancing weld quality and joint strength, thus ensuring overall weld quality. The use of GTAW, by reducing filler material, allows for the selection of lower welding voltage and current, controlling heat input and minimizing welding deformation. The resulting weld is aesthetically pleasing, defect-free, smooth, with a small and uniform reinforcement height and moderate, uniform width. X-ray inspection was used to check the internal quality of the weld, and no defects such as porosity, slag inclusion, or incomplete penetration were found. This ensured the welding quality between cylinder 2 and head 1, improved the weld strength and sealing performance, and met the higher quality requirements for welds in sealed containers.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A container bevel welding structure, characterized in that, The container includes a head (1) and a cylinder (2). The container bevel welding structure includes a semi-U+V shaped bevel (3) set at the welding positions of the head (1) and the cylinder (2). When the head (1) and the cylinder (2) are welded together, the semi-U+V shaped bevel (3) of the head (1) and the semi-U+V shaped bevel (3) of the cylinder (2) are joined to form a U+V shaped bevel weld. The gap between the head (1) and the cylinder (2) is 0 to 0.3 mm. The cross-sectional shape of the bevel (3) includes a bevel edge (301) and a bevel bottom (302) connected in sequence. The bevel edge (301) is straight and the bevel bottom (302) is arc-shaped.
2. The container bevel welding structure according to claim 1, characterized in that, The bottom of the slope bottom (302) is a blunt edge (303), which has a gradually changing size that matches the arc of the slope bottom (302) and is connected to the wall of the end cap (1) or the cylinder (2).
3. The container bevel welding structure according to claim 2, characterized in that, The thickness t2 of the blunt edge (303) is 1 to 1.2 mm.
4. The container bevel welding structure according to claim 2, characterized in that, The arc of the bottom slope (302) extends upward from the edge of the blunt side (303).
5. The container bevel welding structure according to claim 4, characterized in that, The radius R of the arc at the bottom of the slope (302) is 2.5 ± 0.1 mm.
6. The container bevel welding structure according to claim 4, characterized in that, The slope edge (301) extends from the arc of the slope bottom (302) to the outer surface of the end cap (1) or the cylinder (2).
7. The container bevel welding structure according to claim 6, characterized in that, The angle α1 of the slope edge (301) relative to the radial direction is 30±1°.
8. A container bevel welding structure according to any one of claims 1 to 7, characterized in that, The straight line of the slope edge (301) and the arc of the slope bottom (302) are tangentially connected.
9. A container bevel welding structure according to any one of claims 1 to 7, characterized in that, The end cap (1) is open at one end, and the cylinder (2) is hollow with open ends. The end cap (1) includes a connected arc segment and a straight segment. The straight segment is connected to the cylinder (2), and the slope bottom (302) is located at the connecting edge of the straight segment and the cylinder (2).
10. A container bevel welding structure according to claim 9, characterized in that, The wall thickness t1 of the head (1) and the wall thickness t3 of the cylinder (2) are 6.55±0.25mm, and the inner diameter deviation of the welded head (1) and the cylinder (2) is less than 0.1mm.