Inner support forming tool
By using the internal support components and adjustment parts of the internal support forming fixture, the problems of high welding difficulty and quality assurance of small-diameter pipeline busbar shells are solved, realizing single-sided welding, double-sided forming, and efficient processing.
Patent Information
- Application Number
- CN202423291525.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Welding and grinding the inner circumferential seam of small-diameter pipeline busbar shells is difficult, and the welding quality is hard to guarantee.
An internal support forming fixture is adopted, including an internal support component, a forming groove, and an adjustment component. The size of the inner support component is adjusted by adjusting the ring size, so that it supports and tightens at the joint of the outer shell of the pipeline busbar, achieving single-sided welding and double-sided forming, with a smooth weld that does not require grinding.
It reduces the difficulty of circumferential welding of small-diameter pipeline busbar shells, improves processing quality and yield, and achieves single-sided welding and double-sided forming, with smooth welds that do not require secondary grinding.
Smart Images
Figure CN223917120U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of shell welding, and in particular to an internal support forming tool. Background Technology
[0002] Pipeline busbars are a new type of power transmission equipment in the high-voltage switchgear industry. They mainly consist of conductors, insulation layers, shielding layers, and outer shells. The outermost shell is typically formed by circumferential welding of a steel or aluminum alloy cylindrical body. To reduce the risk of the internal wiring being scratched, the welded areas on the inner wall of the cylinder need to be ground smooth after welding. For cylinders with an inner diameter ≥ Φ500mm, the larger inner diameter makes inner and outer circumferential welding and grinding easier. However, for smaller diameter cylinders, although machines or manual labor can extend into the pipe to perform inner circumferential welding, it is inconvenient to monitor the welding head and track the weld seam, making it difficult to guarantee the quality of the inner circumferential weld. Furthermore, grinding the inner circumferential weld is also quite challenging.
[0003] Regarding the aforementioned technologies, the inventors believe it is essential to make further technical improvements to the welding of small-diameter pipeline busbar shells. Utility Model Content
[0004] To address the current challenges of welding and grinding the circumferential seam of small-diameter pipeline busbar shells, this application aims to provide an internal support forming tool for circumferential seam welding of pipeline busbar shells. This tool offers advantages such as single-sided welding with double-sided forming, smooth weld seam requiring no grinding, and high yield.
[0005] To achieve the objectives of this application, this application provides an internal support forming tooling, which adopts the following technical solution:
[0006] An internal support forming fixture includes: an internal support member, wherein the internal support member is a continuous but not closed annular shape, and the unclosed portion has an oblique opening;
[0007] The forming groove is located on the outer peripheral surface of the inner support member and is continuously arranged along the circumferential direction of the inner support member;
[0008] The adjustment assembly includes a first adjustment member, a connecting member, and a second adjustment member. The first adjustment member and the second adjustment member are disposed opposite each other on both sides of the oblique opening, and the ends of the first adjustment member and the second adjustment member that are close to each other are connected by the connecting member.
[0009] In the above technical solution, by adjusting the connecting parts to move the first and second adjusting parts away from each other, and adjusting the size of the inner support ring, the inner support supports and tightens at the joint of the two pipeline busbar shells. The two sides of the forming groove in the width direction are pressed against the two sides of the joint, ensuring that the weld is fully melted and formed during the welding process, while ensuring the height and smoothness of the inner weld. Finally, the effect of single-sided welding and double-sided forming on the outside of the cylinder is achieved without secondary grinding. This will significantly reduce the difficulty of circumferential welding of small-diameter pipeline busbar shells and effectively improve the processing quality of small-diameter pipeline busbar shells.
[0010] The implementation can include any or all of the following features.
[0011] In some other embodiments, the connector is a screw, and the connector is symmetrically divided into a first threaded portion and a second threaded portion with half the length of the connector as the axis of symmetry. The threads of the first threaded portion and the threads of the second threaded portion rotate in opposite directions.
[0012] In other words, in the above technical solution, the connecting part is a positive and negative screw. By rotating the connecting part, the first adjusting part and the second adjusting part can be moved closer to each other or further away from each other at the same time, so as to conveniently adjust the size of the inner support part and achieve a tight fit between the inner support part and the inner weld.
[0013] In some other embodiments, a first shaft pin is fixed on the inner support member located on one side of the oblique opening, a first connecting plate is rotatably connected to the first shaft pin, and a first nut is fixed on the end of the first connecting plate opposite to the first shaft pin.
[0014] A second shaft pin is fixed on the inner support member located on the other side of the oblique opening. A second connecting plate is rotatably connected to the second shaft pin. A second nut is fixed on the end of the second connecting plate opposite to the second shaft pin.
[0015] One axial end of the connector is screwed to the first nut, and the other axial end is screwed to the second nut.
[0016] The above technical solution provides an installation method for an adjustment component. The adjustment component installed according to the above technical solution can provide sufficient rigid support for the inner support member so that the inner support member can form a tight fit with the inner weld when in use. Moreover, this installation method is simple and reliable.
[0017] In other embodiments, the first pin and the second pin are symmetrically arranged on both sides of the oblique opening.
[0018] Through the above technical solution, when adjusting the opening of the inner support member by adjusting the components, it can be ensured that the deformation of the inner support member on both sides of the oblique opening is consistent and stable, which helps to achieve a tight fit between the inner support member and the inner weld.
[0019] In some other embodiments, the first pin is fixed to the inner side of the inner support member, and the second pin is fixed to the inner side of the inner support member.
[0020] Compared to the pins installed on the side of the inner support, the first and second pins installed on the inner wall of the inner support have a larger contact range with the inner support, making the adjustment of the inner support's ring more efficient and effortless.
[0021] In some other embodiments, the inner support is a continuous but not closed annulus.
[0022] The shape of the inner support must match the shape of the machined cylinder. Since the outer shell of the pipeline busbar is cylindrical, the inner support in this application is designed as an annular ring.
[0023] In some other embodiments, the straight-line distance between the first pin and the second pin is less than the diameter of the inner support member, and the first pin and the second pin are positioned close to the oblique opening.
[0024] By using the above technical solution, the adjustment component is positioned close to the oblique opening. In this way, the adjustment component can provide effective rigid support for the inner support ring, and its proximity to the oblique opening ensures reliable closure of the oblique opening, reducing the possibility of leakage of welding wire from the oblique opening after melting during the welding process.
[0025] In other embodiments, the inner support is made of spring steel or copper strip.
[0026] The above technical solution allows the inner support to undergo a small amount of elastic deformation during use, thereby increasing the tightness of the fit between the inner support and the inner weld. Furthermore, the spring steel or copper strip possesses sufficient rigidity to effectively support the workpiece, resulting in higher quality weld back formation.
[0027] In some other embodiments, the maximum depth of the forming groove is equal to the maximum weld clearance on the back side of the workpiece weld.
[0028] The depth of the forming groove depends on the height of the inner weld after single-sided welding and double-sided forming. The depth of the forming groove can be designed according to the diameter of the workpiece being processed. Generally, to ensure a strong weld, the depth of the forming groove should be relatively small to reduce the friction between the inner side of the weld and the pipeline busbar.
[0029] In some other embodiments, a third nut is fixed to the middle of the connector, and the third nut is an external hexagonal nut.
[0030] In the above technical solution, the third nut serves as the point of force for tools such as wrenches, and rotating the third nut causes the connecting parts to rotate.
[0031] In summary, this application provides an internal support forming tooling, which has the following beneficial effects:
[0032] First, the size of the inner support tooling ring of this application is easy to adjust, and it has high applicability. Within its adjustment range, it can provide sufficient rigid internal support force for the workpiece, forming a tight fit with the circumferential seam to be welded on the workpiece, resulting in high quality of weld back formation.
[0033] Secondly, the tooling of this application can achieve the effect of single-sided welding and double-sided forming, and the back of the weld after forming has a high smoothness and does not require secondary grinding. When used for processing small-diameter pipeline busbar shells, it helps to reduce processing difficulty and improve the yield.
[0034] Third, the tooling in this application can achieve rapid expansion and contraction during use, and is easy to install and disassemble. Attached Figure Description
[0035] Figure 1 This is a schematic diagram of the overall structure of the internal support tooling in this application.
[0036] Figure 2 This is a front view of the internal support fixture in this application.
[0037] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.
[0038] Figure 4 This is a schematic diagram of the use of the internal support tooling in this application.
[0039] Explanation of reference numerals in the attached figures:
[0040] 1. Tooling;
[0041] 11. Internal support components;
[0042] 111. Oblique cut;
[0043] 112. Forming groove;
[0044] 12. Adjustment components;
[0045] 121. First adjusting component; 1211. First shaft pin; 1212. First connecting plate; 1213. First nut;
[0046] 122. Second adjusting component; 1221. Second shaft pin; 1222. Second connecting plate; 1223. Second nut;
[0047] 123. Connector; 1231. First threaded part; 1232. Second threaded part; 1233. Third nut;
[0048] 2. Workpiece;
[0049] 21. Butt joint. Detailed Implementation
[0050] To make the objectives and technical solutions of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, back, bottom, and top, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting this application.
[0051] This application discloses an internal support forming tooling, hereinafter referred to as tooling 1. (Refer to...) Figure 1 The system includes an inner support member 11, which is a continuous but not closed annular ring. In this embodiment, the outer shell of the pipeline busbar being processed is a round pipe, hereinafter referred to as workpiece 2, and the inner support member 11 is a continuous but not closed annular ring. The shape of the inner support member 11 is adapted to the shape of the workpiece 2 being processed. For example, if the workpiece 2 being processed is a square pipe, then the inner support member 11 is a continuous but not closed square ring.
[0052] Reference Figure 1 The inner support member 11 has an open portion on its circumference, which has a beveled cut 111. In some embodiments, the beveled cut 111 may be oriented to the left, and in other embodiments, the beveled cut 111 may be oriented to the right. The beveled cut 111 is used to offset the inner support member 11 during the process of changing the size of the opening, so as to ensure that the overall outer diameter of the inner support member 11 is adapted to the inner diameter of the outer shell of the pipeline busbar that needs to be processed.
[0053] Reference Figure 1 A forming groove 112 is provided on the outer circumferential surface of the inner support member 11. The forming groove 112 is continuously arranged along the circumference of the inner support member 11. In some embodiments, the longitudinal cross-sectional shape of the forming groove 112 can be square, and in other embodiments, the longitudinal cross-sectional shape of the forming groove 112 can also be arc-shaped to achieve different shape requirements of the weld. The two sides of the forming groove 112 are used to abut against both sides of the butt joint of the two workpieces 2. During circumferential welding, the circumferential joint is melted through and formed on the back side of the welded part according to the shape of the forming groove 112, achieving the effect of single-sided welding and double-sided forming. The depth of the forming groove 112 determines the weld height on the back side of the welded part. The maximum depth of the forming groove 112 is equal to the maximum weld reinforcement height on the back side of the weld of the workpiece 2. For example, the depth of the forming groove 112 can be 1 mm.
[0054] Reference Figure 1 and Figure 2 The internal support forming fixture 1 of this application also includes an adjustment assembly 12, which includes a first adjustment member 121, a connecting member 123, and a second adjustment member 122. With the center line L of the oblique cut 111 as the axis of symmetry, the first adjustment assembly 12 and the second adjustment assembly 12 are symmetrically installed on both sides of the oblique cut 111. The ends of the first adjustment assembly 12 and the second adjustment assembly 12 that are close to each other are connected to the connecting member 123. Specifically, a first shaft pin 1211 is fixed to the inner wall of the internal support member 11 located on one side of the oblique cut 111. A first connecting plate 1212 is rotatably sleeved on the first shaft pin 1211, and a first nut 1213 is fixedly connected to the end of the first connecting plate 1212 away from the first shaft pin 1211. A second shaft pin 1221 is fixed at a position symmetrical to the first shaft pin 1211 on the inner wall of the inner support member 11. A second connecting plate 1222 is rotatably sleeved on the second shaft pin 1221. A second nut 1223 is fixed at the end of the second connecting plate 1222 away from the second shaft pin 1221. The connecting member 123 is screwed to both the first nut 1213 and the second nut 1223.
[0055] Reference Figure 3 In some embodiments, the connector 123 is a screw, which is simultaneously screwed to both the first nut 1213 and the second nut 1223. With half the length of the connector 123 as the axis of symmetry, the connector 123 is divided into a first threaded portion 1231 and a second threaded portion 1232, with the threads of the first threaded portion 1231 and the second threaded portion 1232 rotating in opposite directions. That is, the connector 123 is a reversible screw. A third nut 1233 is fixed to the middle of the connector 123, at the point where the first threaded portion 1231 and the second threaded portion 1232 meet. The third nut 1233 is an external hexagonal nut, which serves as a point of force when the connector 123 is rotated.
[0056] In some embodiments, the straight-line distance between the first pin 1211 and the second pin 1221 is less than the diameter of the inner support 11, and the adjustment assembly 12 is positioned close to the oblique cut 111 so as to quickly adjust the size of the inner support 11's opening by means of the adjustment assembly 12.
[0057] In some embodiments, the inner support member 11 can be made of spring steel or copper. For example, the inner support member 11 can be made of copper strip rolled into a circle, so that the inner support member 11 has a certain rigidity and elasticity, plays an effective inner lining role, and ensures the quality of the circumferential weld.
[0058] Reference Figure 4The implementation principle of an internal support forming tool in this application embodiment is as follows: select an internal support forming tool 1 that is compatible with the inner diameter of the outer shell of the pipeline busbar to be welded, rotate the connecting piece 123 so that the first adjusting piece 121 and the second adjusting piece 122 move closer to each other at the same time, and the internal support piece 11 contracts.
[0059] The inner support member 11 is inserted into the workpiece 2 and into the butt joint 21 of the workpiece 2, so that the two sides of the forming groove 112 are located on both sides of the butt joint 21. The connecting member 123 is rotated again in the opposite direction to the rotation direction of the inner support member 11, so that the first adjusting member 121 and the second adjusting member 122 move away from each other at the same time. The inner support member 11 is tightened, and the forming groove 112 is pressed against the inner wall of the cylinder on both sides of the butt joint 21, so as to achieve a tight fit between the tooling 1 and the workpiece 2 and the butt joint 2.
[0060] Circumferential welding is performed from the outside of the cylinder of workpiece 2. This can be automated welding. The welding wire is melted and formed on the back side of the welding area according to the shape and size of the forming groove 112. After welding is completed, the connecting part 123 is rotated again so that the first adjusting part 121 and the second adjusting part 122 move closer to each other at the same time. The inner support part 11 retracts until the back side of the weld is completely separated from the forming groove 112. Then, the tooling 1 is removed.
[0061] The tooling 1 of this application can quickly and accurately achieve expansion and contraction, is easy to install and disassemble, and has high applicability. It is especially suitable for circumferential welding of small-diameter pipe busbar shells, and can achieve single-sided welding and double-sided forming without secondary grinding. It significantly reduces the difficulty of circumferential welding of small-diameter pipe busbar shells and effectively improves the processing quality of small-diameter pipe busbar shells.
[0062] Of course, the above embodiments are the best embodiments of this application, and are only used to illustrate the technical concept and features of this application. Their purpose is to enable those skilled in the art to understand the content of this application and implement it accordingly, and they should not be used to limit the scope of protection of this application. All modifications made in accordance with the spirit of the main technical solution of this application should be included within the scope of protection of this application.
Claims
1. An inside bolster forming tool characterized by, The utility model relates to a welding seam adjusting device for a workpiece, comprising: an inner support which is a continuous but not closed ring, the not closed part having an oblique opening; a forming groove located on the outer circumferential surface of the inner support and continuously arranged along the circumference of the inner support; an adjusting assembly comprising a first adjusting piece, a connecting piece and a second adjusting piece, the first adjusting piece and the second adjusting piece being oppositely arranged on both sides of the oblique opening, and the ends of the first adjusting piece and the second adjusting piece close to each other being connected by the connecting piece.
2. An inside bolster forming tool as claimed in claim 1, wherein: The connecting piece is a screw rod, the connecting piece being symmetrically divided into a first threaded part and a second threaded part at the half length of the connecting piece, and the rotation directions of the threads of the first threaded part and the second threaded part being opposite.
3. An inside bolster forming tool as claimed in claim 2, wherein: A first shaft pin is fixed on the inner support on one side of the oblique opening, a first connecting plate is rotatably connected to the first shaft pin, and a first nut is fixed on the end of the first connecting plate opposite to the first shaft pin. A second shaft pin is fixed on the inner support on the other side of the oblique opening, a second connecting plate is rotatably connected to the second shaft pin, and a second nut is fixed on the end of the second connecting plate opposite to the second shaft pin. The connecting piece is axially connected with the first nut at one end and axially connected with the second nut at the other end.
4. An inside bolster forming tool as claimed in claim 3, wherein: The first shaft pin and the second shaft pin are symmetrically arranged on both sides of the oblique opening.
5. An inside bolster forming tool as claimed in claim 4, wherein: The first shaft pin is fixed on the inner side of the inner support, and the second shaft pin is fixed on the inner side of the inner support.
6. An inside bolster forming tool as claimed in claim 5, wherein: The inner support is a continuous but not closed circular ring.
7. An inside bolster forming tool as claimed in claim 6, wherein: The straight-line distance between the first shaft pin and the second shaft pin is less than the diameter of the inner support, and the first shaft pin and the second shaft pin are arranged close to the oblique opening.
8. An inside bolster forming tool as defined in claim 1, wherein: The inner support is made of spring steel or copper band.
9. An inside bolster forming tool as defined in claim 1 wherein: The maximum depth of the forming groove is equal to the maximum weld reinforcement of the back surface of the weld seam of the workpiece.
10. An inside bolster forming tool as claimed in claim 2, wherein: A third nut is fixed in the middle of the connecting piece, and the third nut is an outer hexagonal nut.