Metal pipe blank edge rolling device for welding

Abstract

The utility model provides a metal tube blank edge rolling device for welding, a lower die is fixedly installed on a base, an upper pressing plate is arranged above the lower die, the upper pressing plate is installed at the execution end of an external driving device, the external driving device can drive the upper pressing plate and the lower die to move relatively, an edge rolling core die is arranged on the upper pressing plate, and the edge rolling core die is connected with the lower die. An arc-shaped groove is formed in the upper end of the lower die, a to-be-rolled plate is arranged on the lower die, the upper pressing plate can drive the rolling core die to abut against the upper end of the to-be-rolled plate and sink into the arc-shaped groove, and the arc-shaped groove is used for forming the to-be-rolled plate. According to the metal pipe blank edge rolling device for welding, the lower die is installed on the base, the edge rolling core die is installed on the upper pressing plate, the edge rolling core die and the arc-shaped groove are combined through the upper pressing plate which moves relatively to form a plate, the forming structure and operation are simple, and the cost is low. And during production, products with different specifications can be matched with the device only by correspondingly replacing the edge rolling core mold and the lower mold, so that the universality is realized, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of tube blank rolling, in particular to a metal tube blank rolling device for welding. Background Art

[0002] In today's industrial manufacturing, coil welding is a crucial welding technology. This is particularly true for metal bellows. This specialized welding method involves joining two or more metal pipes together under high temperature and pressure to form a seamless pipe. This technology is widely used in industries such as oil, gas, chemicals, and nuclear energy, and is an integral part of the modern industrial system.

[0003] Coiled tube welding has a wide range of applications. In the petrochemical industry, it connects various pipelines to ensure the smooth flow of oil and natural gas. In the nuclear power industry, it connects reactor pressure vessels and heat exchangers to ensure the safe operation of nuclear reactions. Coiled tube welding, as described in this article, involves welding sheet metal to a coiled tube. This welding method solves the problem of connecting large-diameter, thick-walled pipes that traditional welding methods cannot. Its emergence has significantly improved production efficiency in these industries. The principle of coiled tube welding is simple. First, the sheet metal and coiled tube are heated to their melting point, and then they are tightly bonded together. The welder's technical proficiency, the advanced welding equipment, and the quality of the welding materials all have a significant impact on the welding results. While the principle of pipe welding may seem simple, its actual operation requires advanced skills. Because the material, size, and shape of the sheet metal and coiled tube may vary, the welder must be able to flexibly adjust welding parameters to ensure weld quality.

[0004] The welding environment for rolled tube blanks is often harsh, characterized by high temperatures, high pressures, and corrosive environments. This requires welding equipment with excellent resistance to high temperatures, high pressures, and corrosion. Furthermore, welding materials must be able to maintain stable performance in these environments. Although rolled tube blank welding has been widely used in many industries, its technological development still faces several challenges. For example, how to improve welding efficiency and reduce production costs; how to improve welding quality and reduce welding defects; and how to meet increasingly stringent environmental protection requirements. As an advanced welding technology, rolled tube blank welding has made significant contributions to modern industrial production. However, with the advancement of technology and increasing environmental protection requirements, we need to continue to explore new welding technologies and methods to meet future production needs.

[0005] In the existing technology, before welding the rolled tube blanks, it is necessary to produce an appropriate tube blank. The materials and specifications of the tube blanks are diverse. In order to improve the welding quality of the rolled tube blanks, the consistency of the gap between the tube blanks to be welded is particularly important. This requires a set of rolling devices for each tube blank. The tooling cost is high, and debugging and maintenance are time-consuming and labor-intensive, which increases production costs and poors production quality and process consistency. Summary of the Invention

[0006] In view of this, the utility model aims to propose a metal tube blank rolling device for welding, so as to solve the problem in the prior art that different tube blanks need to be equipped with different rolling devices, which increases production costs and has poor production quality and process consistency.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0008] A device for rolling a metal tube blank for welding comprises a lower mold, a side folding assembly and a rolling core mold, and the lower mold is fixedly installed on a base, an upper pressure plate is arranged above the lower mold, and the upper pressure plate is installed to the execution end of an external driving device, and the external driving device can drive the upper pressure plate and the lower mold to move relative to each other, a rolling core mold is arranged on the upper pressure plate, an arc-shaped groove is provided at the upper end of the lower mold, and a plate to be rolled is arranged on the lower mold, the upper pressure plate can drive the rolling core mold to press against the upper end of the plate to be rolled and sink into the arc-shaped groove, and the arc-shaped groove is used to form the plate to be rolled.

[0009] Furthermore, the metal tube blank rolling device for welding also includes a side folding assembly, and a side folding assembly is arranged on both sides of the lower mold respectively. The two side folding assemblies are parallel to each other and arranged opposite to each other. The execution end of each side folding assembly can slide, and the sliding execution end can abut against the side of the rolled plate formed by the arc groove, and the execution end can press the side of the rolled plate to the periphery of the rolling core mold.

[0010] Furthermore, the side folding assembly includes a rodless cylinder, a folding plate is installed at the execution end of the rodless cylinder, a folding groove is provided at one end of the folding plate close to the lower mold, and the inner circle contour of the folding groove matches the outer contour of the rolling core mold.

[0011] Furthermore, each of the side folding components is equipped with a baffle, and the baffle is located at one end of the side folding component away from the lower mold.

[0012] Furthermore, a positioning rod is provided on the base, a positioning hole is provided on the upper pressure plate, and the outer periphery of the positioning rod is slidably connected to the positioning hole.

[0013] Furthermore, limit plates are respectively provided on both sides of the lower mold, and the two limit plates are arranged opposite to each other. The lower end of each limit plate is fixedly mounted on the base, and the upper end of the limit plate is provided with a notch, and one side of the plate to be rolled can be snapped into the notch.

[0014] Furthermore, a connecting seat is respectively provided at both ends of the rolling core mold, and the connecting seat is fixedly installed to the lower end of the upper pressure plate. A blind groove is provided on one side of the connecting seat, and one end of the rolling core mold is slidably connected to the blind groove.

[0015] Furthermore, a slider is provided at each end of the rolling core mold, and the slider is a polygonal structure, and one end of the rolling core mold is slidably connected to the blind groove through the slider.

[0016] Furthermore, the outer dimensions of the slider are smaller than the diameter of the rolling core mold.

[0017] Furthermore, a through groove is axially provided on the upper edge of the rolling core mold, and an arc block is detachably installed in the through groove, and the outer end surface of the arc block is not flush with the outer periphery of the rolling core mold.

[0018] Compared with the prior art, the metal tube blank rolling device for welding described in the present invention has the following features:

[0019] Beneficial effects:

[0020] (1) The metal tube blank rolling device for welding described in the present invention has a lower mold installed on the base and a rolling core mold installed on the upper pressure plate. The upper pressure plate moves relative to each other to realize the closing of the rolling core mold and the arc groove to realize the forming of the plate. The forming structure and operation are simple. During production, products of different specifications only need to replace the rolling core mold and the lower mold accordingly to achieve device adaptation. It has universality and reduces production costs.

[0021] (2) The utility model discloses a device for rolling a metal tube blank for welding. The arc groove of the lower mold can form a semicircular arc structure of the plate. Two oppositely arranged side folding assemblies are used to form the other semicircular arc structure. The rodless cylinder can drive the folding plate to move toward and press the side of the rolled plate, so that the side contacts the periphery of the rolling core mold to form the inner side of the side, and the outer side of the side is formed by the folding groove. In this way, the pressure is maintained to shape the tube blank to be welded, and the forming efficiency is high and the forming quality is controllable.

[0022] (3) The metal tube blank rolling device for welding described in the utility model has a baffle used to limit the initial position of the folding plate after opening, and has the function of moving and resetting the rodless cylinder to prevent the inconsistent pressure holding pressure of the shape of the tube blank to be welded caused by the poor displacement accuracy of the rodless cylinder, thereby improving production quality.

[0023] (4) The device for rolling a metal tube blank for welding described in the present invention has a blind groove on one side of the connecting seat to facilitate the staff to disassemble and assemble the rolling core mold, and in order to prevent the rolling core mold from rotating when pressed down, the slider adopts a rectangular structure. At the same time, in order not to prevent the slider from interfering with the disassembly of the tube blank, the outer dimensions of the slider are smaller than the diameter of the rolling core mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic structural diagram of a metal pipe blank rolling device for welding according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the exploded structure of the metal pipe blank rolling device for welding according to an embodiment of the present utility model;

[0027] Figure 3 This is a structural diagram of the lower mold installed on the base according to an embodiment of the utility model;

[0028] Figure 4 This is a structural diagram of the rolling core mold according to an embodiment of the present utility model;

[0029] Figure 5 This is a structural diagram of the side folding assembly according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic structural diagram of a rolled plate formed with an arc groove according to an embodiment of the present utility model.

[0031] Description of reference numerals:

[0032] 1-base; 11-positioning rod; 12-baffle; 13-limiting plate; 2-lower mold; 21-arc groove; 3-side folding assembly; 31-rodless cylinder; 32-folding plate; 33-folding groove; 4-rolling core mold; 41-slider; 42-through groove; 5-upper pressure plate; 51-positioning hole; 6-plate to be rolled; 61-plate side; 7-connecting seat. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] like Figures 1-6 As shown, the metal tube blank rolling device for welding includes a lower mold 2, a side folding assembly 3 and a rolling core mold 4, and the lower mold 2 is fixedly installed on the base 1, and an upper pressure plate 5 is arranged above the lower mold 2, and the upper pressure plate 5 is installed to the execution end of the external driving device, and the external driving device is a push rod cylinder or a linear motor in the prior art. The external driving device can drive the upper pressure plate 5 to move relative to the lower mold 2, and a rolling core mold 4 is arranged on the upper pressure plate 5. An arc groove 21 is provided at the upper end of the lower mold 2, and a plate 6 to be rolled is arranged on the lower mold 2. The upper pressure plate 5 can drive the rolling core mold 4 to press against the upper end of the plate 6 to be rolled and sink into the arc groove 21. The arc groove 21 is used to form the plate 6 to be rolled. The device installs the lower mold 2 on the base 1, and installs the rolling core mold 4 on the upper pressure plate 5. The rolling core mold 4 and the arc groove 21 are closed by the relative movement of the upper pressure plate 5, so as to realize the forming of the plate 6 as shown in FIG. Figure 6 The arc structure shown has a simple molding structure and operation. During production, products of different specifications can be adapted by simply replacing the rolling core mold 4 and the lower mold 2. This has universality and reduces production costs.

[0038] The metal tube blank rolling device for welding also includes a side folding component 3, and a side folding component 3 is set on each side of the lower mold 2. The two side folding components 3 are parallel to each other and arranged oppositely. The execution end of each side folding component 3 can slide, and the sliding execution end can abut against the side of the rolled plate 6 formed by the arc groove 21, and the execution end can press the side of the rolled plate 6 to the periphery of the rolling core mold 4. The side folding component 3 includes a rodless cylinder 31, and the execution end of the rodless cylinder 31 is installed with a folding plate 32. The folding plate 32 is set near one end of the lower mold 2 There is a folding groove 33, and the inner circle contour of the folding groove 33 matches the outer contour of the rolling core mold 4. In this embodiment, the arc groove 21 of the lower mold 2 can form a semicircular arc structure of the plate 6, and the two oppositely arranged side folding components 3 are used to form the other semicircular arc structure. The rodless cylinder 31 can drive the folding plate 32 to move and press toward the side of the rolled plate 6, so that the side contacts the outer periphery of the rolling core mold 4 to form the inner side of the side, and the outer side of the side is formed by the folding groove 33. In this way, the pressure is maintained and the pipe blank to be welded is shaped, and the forming efficiency is high and the forming quality is controllable.

[0039] A positioning rod 11 is provided on the base 1, and a positioning hole 51 is provided on the upper pressure plate 5. The outer periphery of the positioning rod 11 is slidably connected to the positioning hole 51 to position the relative positions of the upper pressure plate 5, the rolling core mold 4, the base 1 and the lower mold 2. Each side folding assembly 3 is equipped with a baffle 12, and the baffle 12 is located at the end of the side folding assembly 3 away from the lower mold 2. The baffle 12 is used to limit the initial position of the folding plate 32 after opening, and has the function of moving and resetting the rodless cylinder 31 to prevent the inconsistent holding pressure of the shape of the pipe blank to be welded due to poor displacement accuracy of the rodless cylinder 31, thereby improving production quality.

[0040] Limiting plates 13 are respectively provided on both sides of the lower mold 2, and the two limiting plates 13 are arranged opposite to each other. The lower end of each limiting plate 13 is fixedly mounted on the base 1, and the upper end of the limiting plate 13 is provided with a notch, and one side of the sheet material 6 to be rolled can be snapped into the notch. The two limiting plates 13 are positioning devices for placing the sheet material 6 to be rolled onto the lower mold 2, which makes it convenient for the staff to quickly and accurately place the sheet material 6 to be rolled onto the lower mold 2.

[0041] A connecting seat 7 is respectively provided at both ends of the rolling core mold 4, and the connecting seat 7 is fixedly installed to the lower end of the upper pressure plate 5. A blind groove is provided on one side of the connecting seat 7, and one end of the rolling core mold 4 is slidably connected to the blind groove. A slider 41 is respectively provided at both ends of the rolling core mold 4, and the slider 41 is a polygonal structure. One end of the rolling core mold 4 is slidably connected to the blind groove through the slider 41. The blind groove on one side of the connecting seat 7 is convenient for the staff to disassemble and assemble the rolling core mold 4. After the molding is completed, the tube blank needs to be disassembled. At this time, the staff only needs to remove the rolling core mold 4 from the upper pressure plate 5, and then pull the tube blank out axially to realize the unloading of the tube blank. The disassembly method is simple, and in order to prevent the rolling core mold 4 from rotating when pressed down, the slider 41 of this embodiment adopts a rectangular structure, and at the same time, in order not to prevent the slider 41 from interfering with the disassembly of the tube blank, the outer size of the slider 41 is smaller than the diameter of the rolling core mold 4.

[0042] After the tube blank is formed, the two sides of the original sheet 6 will be butted or tend to be butted, and the inner ring of the tube blank will be tightly attached to the outer periphery of the rolling mandrel 4, which affects the removal of the tube blank. In this embodiment, a through groove 42 is provided in the axial direction of the upper edge of the rolling mandrel 4. A curved block can be removably installed in the through groove 42. The outer end surface of the curved block is not flush with the outer periphery of the rolling mandrel 4. In other words, the outer end surface of the curved block will protrude or be recessed from the outer periphery of the rolling mandrel 4, making it easier for workers to remove the tube blank.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for rolling up a metal tube blank for welding, characterized by: The invention comprises a lower mold (2), a side folding assembly (3) and a rolling core mold (4), wherein the lower mold (2) is fixedly mounted on a base (1), an upper pressing plate (5) is arranged above the lower mold (2), and the upper pressing plate (5) is mounted on the execution end of an external driving device, and the external driving device can drive the upper pressing plate (5) and the lower mold (2) to move relative to each other, a rolling core mold (4) is arranged on the upper pressing plate (5), an arc groove (21) is arranged on the upper end of the lower mold (2), and a plate to be rolled (6) is arranged on the lower mold (2), the upper pressing plate (5) can drive the rolling core mold (4) to press against the upper end of the plate to be rolled (6) and sink into the arc groove (21), and the arc groove (21) is used to shape the plate to be rolled (6).

2. The device for rolling a metal tube blank for welding according to claim 1, characterized in that: It also includes a side folding assembly (3), and a side folding assembly (3) is respectively provided on both sides of the lower mold (2), and the two side folding assemblies (3) are parallel to each other and arranged opposite to each other. The execution end of each side folding assembly (3) can slide, and the sliding execution end can abut against the side of the rolled plate (6) formed by the arc groove (21), and the execution end can press the side of the rolled plate (6) to the periphery of the rolling core mold (4).

3. The device for rolling a metal tube blank for welding according to claim 2, characterized in that: The side folding assembly (3) includes a rodless cylinder (31), a folding plate (32) is installed at the execution end of the rodless cylinder (31), and a folding groove (33) is provided at one end of the folding plate (32) close to the lower mold (2), and the inner circle contour of the folding groove (33) matches the outer contour of the rolling core mold (4).

4. The device for rolling a metal pipe blank for welding according to claim 1, characterized in that: Each side folding assembly (3) is equipped with a baffle (12), and the baffle (12) is located at one end of the side folding assembly (3) away from the lower mold (2).

5. The device for rolling a metal pipe blank for welding according to claim 1, characterized in that: A positioning rod (11) is provided on the base (1), a positioning hole (51) is provided on the upper pressing plate (5), and the periphery of the positioning rod (11) is slidably connected to the positioning hole (51).

6. The device for rolling a metal tube blank for welding according to claim 1, characterized in that: Limiting plates (13) are respectively provided on both sides of the lower mold (2), and the two limiting plates (13) are arranged opposite to each other. The lower end of each limiting plate (13) is fixedly mounted on the base (1), and the upper end of the limiting plate (13) is provided with a notch, and one side of the plate (6) to be rolled can be snapped into the notch.

7. The device for rolling a metal tube blank for welding according to claim 1, characterized in that: A connecting seat (7) is provided at each end of the rolling core mold (4), and the connecting seat (7) is fixedly mounted to the lower end of the upper pressing plate (5). A blind groove is provided on one side of the connecting seat (7), and one end of the rolling core mold (4) is slidably connected to the blind groove.

8. The device for rolling a metal tube blank for welding according to claim 1, characterized in that: A slider (41) is provided at each end of the rolling core mold (4), and the slider (41) is a polygonal structure. One end of the rolling core mold (4) is slidably connected to the blind groove through the slider (41).

9. The device for rolling a metal tube blank for welding according to claim 8, characterized in that: The outer dimensions of the slider (41) are smaller than the diameter of the rolling core die (4).

10. The device for rolling a metal tube blank for welding according to claim 1, characterized in that: A through groove (42) is axially provided on the upper edge of the rolling core mold (4), and an arc block is detachably installed in the through groove (42), and the outer end surface of the arc block is not flush with the periphery of the rolling core mold (4).

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