A flame welding machine for aluminum pipes

Abstract

This utility model relates to the field of aluminum tube welding technology, specifically disclosing a flame welding machine for aluminum tubes. The machine includes a flame welding device and a rotating mounting frame. The flame welding device is mounted on a main support and can move up and down to perform flame welding on products at welding positions. The rotating mounting frame is located below the flame welding device and has multiple welding positions arranged in a circular pattern. Products to be welded are positioned in each welding position. After the flame welding device descends to its lowest position, it performs flame welding on the product at the current welding position. After welding is completed, the rotating mounting frame switches to the next welding position for welding, enabling continuous flame welding of multiple products. This device has a compact structure, high operating efficiency, and is beneficial for improving welding consistency and quality. It is suitable for automated welding production scenarios involving mass production of aluminum tube workpieces.

Description

Technical Field

[0001] This utility model relates to a welding machine, specifically a flame welding machine for aluminum pipes. Background Technology

[0002] Aluminum tubular parts are widely used in various industrial fields such as refrigeration equipment, automobile manufacturing, and heat exchangers due to their excellent thermal conductivity and lightweight properties. To achieve high-strength connections between aluminum tubing or between aluminum tubing and other metal components, flame welding is typically used for assembly. However, traditional flame welding processes suffer from numerous problems, including low welding efficiency, inaccurate welding position positioning, high reliance on manual labor, and poor weld consistency.

[0003] Most common welding equipment currently available can only perform welding operations at single points or a few stations. Operators must manually load and unload workpieces and complete the process one by one using single-point welding heads. This not only limits production efficiency but also makes it easy for positioning errors during the welding process to lead to unstable welding quality. Furthermore, some existing welding structures cannot effectively ensure the end faces of the components being welded are properly clamped together during the welding process, which can easily lead to misalignment or poor fusion during welding.

[0004] Especially when flame welding heat-sensitive materials such as aluminum, the control requirements for flame position and welding angle are even higher. It is necessary to minimize heating time and improve welding uniformity while ensuring weld strength. Therefore, there is still room for further optimization in the structure and operation of existing equipment. Summary of the Invention

[0005] To address the aforementioned problems, this utility model provides a flame welding aluminum tube welding machine, which effectively overcomes the shortcomings of existing technologies.

[0006] This utility model is achieved through the following technical solution: a flame welding aluminum tube welding machine, comprising:

[0007] A flame welding device is mounted on a main support frame, and the flame welding device is capable of vertical movement.

[0008] A rotating mounting frame is installed at the lower end of the flame welding device. The rotating mounting frame has one or more welding positions arranged in a circle. The product to be welded is positioned and installed in the welding position. After the flame welding device descends, it performs flame welding on the product to be welded at the top welding position.

[0009] As a preferred technical solution, the rotating mounting bracket includes:

[0010] Two support plates;

[0011] The mounting shaft is rotatably mounted on the two support plates via bearings;

[0012] A first mounting plate and a second mounting plate are provided. The first mounting plate is fixedly mounted on the mounting shaft, and the second mounting plate is slidably mounted on the mounting shaft. A threaded section is provided at the mounting shaft position on the outer end of the second mounting plate, and a first locking nut is installed on the threaded section. The second mounting plate is pushed towards the first mounting plate by the first locking nut.

[0013] One or more first mounting rods and one or more second mounting rods are provided. One or more first mounting rods are arranged around the first mounting plate, and one or more second mounting rods are arranged around the second mounting plate. The product to be welded is positioned and installed in the first mounting rods and the second mounting rods.

[0014] As a preferred technical solution, positioning grooves are provided on the opposite surfaces of the first mounting rod and the second mounting rod. The product to be welded includes a first welding part and a second welding part. The first welding part is positioned and installed in the first mounting rod, and the second welding part is positioned and installed in the second mounting rod. The second mounting plate is pushed by the first locking nut, so that the welding end of the second welding part presses against the welding end of the first welding part.

[0015] As a preferred technical solution, the mounting shaft is driven to rotate in a circular direction by a drive motor. The drive motor is a brake motor, which locks its degree of freedom in the circumferential direction when the power is off. The drive motor is fixedly mounted on the support plate by a motor bracket.

[0016] As a preferred technical solution, both the first mounting plate and the second mounting plate are provided with mounting ears, and both the first mounting rod and the second mounting rod are rotatably mounted on the mounting ears by a rotating pin, and a second locking nut is provided at one end of the rotating pin.

[0017] As a preferred technical solution, the first mounting rod and the mounting rod are provided with locking screws on one side of the positioning groove, and the welded parts installed in the positioning groove are pressed by the locking screws.

[0018] As a preferred technical solution, the flame welding device includes a cylinder frame fixedly installed on the top of the main support and a drive cylinder installed on the top of the cylinder frame. The output end of the drive cylinder is connected to a fixed box. A metal tube that can be bent and deformed at will is installed on each of the four sides of the fixed box. A flame nozzle is installed at the output end of each metal tube. The input end of the fixed box is connected to a combustion gas source.

[0019] As a preferred technical solution, a flame focusing cavity is formed between the four flame nozzles, and the product to be welded is located in the flame focusing cavity during welding.

[0020] The beneficial effects of this utility model are: by setting a rotating mounting frame that can rotate circumferentially, and setting multiple welding mounting positions around it, multiple products to be welded can be loaded at one time. After welding is completed, the work position can be quickly switched to the welding position by rotation, realizing continuous welding operation, reducing manual intervention, and significantly improving work efficiency and production capacity.

[0021] This utility model adopts an adjustable first mounting plate and second mounting plate structure. The second mounting plate can be moved along the mounting axis towards the first mounting plate by locking the nut to achieve reliable axial clamping of the two welded parts, ensuring that the welded end faces fit tightly, avoiding displacement and incomplete welding during the welding process, and improving the strength and consistency of the weld.

[0022] The flame welding device of this utility model uses four flexible metal tubes with flame nozzles installed on them to form a flame gathering chamber. The product to be welded is located in the flame chamber during the welding process, which provides more complete flame coverage and more uniform heat input, thus helping to improve welding speed and quality. It is especially suitable for welding aluminum tubes where high thermal uniformity is required.

[0023] The workpiece to be welded in this invention is installed between the first mounting rod and the second mounting rod. The two mounting rods are arranged in a V-shape, which fully exposes the welding joint area, avoids obstruction, facilitates comprehensive heating by the multi-angle flame nozzle, and improves the welding coverage and welding effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a front structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the rotating mounting bracket of this utility model;

[0028] Explanation of reference numerals in the attached figures:

[0029] 4. Main support frame; 9. Support plate; 17. Mounting shaft; 11. First mounting plate; 8. Second mounting plate; 10. First mounting rod; 6. Second mounting rod; 7. First locking nut; 19. Positioning groove; 12. First welded part; 5. Second welded part; 13. Drive motor; 18. Motor bracket; 14. Mounting ear; 20. Locking screw; 2. Cylinder frame; 1. Drive cylinder; 3. Fixing box; 16. Metal tube; 15. Flame nozzle. Detailed Implementation

[0030] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0032] like Figures 1-3 As shown, this utility model discloses a flame welding machine for aluminum tubes, comprising a flame welding device and a rotating mounting frame. The flame welding device is mounted on a main support 4, which is a steel frame structure with high strength and stability, used to support the welding device and the operating components of the welding station. The flame welding device is mounted on the top of the main support 4 via a lifting mechanism, allowing it to move vertically up and down. It contains a set of cylinders, with the output end of the driving cylinder 1 connected to a fixed box 3. The fixed box 3 is made of high-temperature resistant material and has a cubic structure. A metal tube 16 is mounted on each of its four sides. These metal tubes 16 are made of flexible, deformable tubing, allowing for adjustment of angle and orientation according to processing requirements, adapting to different welding positions and flame directions.

[0033] Each metal tube 16 has a flame nozzle 15 fixedly installed at its output end. This flame nozzle 15 is a high-precision premixed gas nozzle, capable of precisely controlling the flame temperature and size, used to uniformly heat the aluminum tube connection area to be welded. The four flame nozzles 15 together form a closed welding area, creating a flame focusing chamber in the center during flame spraying. The product to be welded is positioned at the center of this flame focusing chamber during the welding process. This structural design ensures uniform heating and strong enclosure of the welding area, facilitating rapid welding and improving the strength and appearance quality of the weld joint.

[0034] The flame welding device is controlled by a drive cylinder 1 located on the top of the cylinder frame 2 to lift and lower. When the flame welding device descends to the lowest point, the flame nozzle 15 is aimed at the product to be welded at the current welding station to perform the welding operation. After completion, it rises to the preset position and works with the rotating mounting frame to complete the switch to the next station.

[0035] The rotating mounting bracket is installed below the flame welding device and consists of two symmetrically arranged support plates 9. The support plates 9 are fixed to the main support 4 by a reinforcing rib structure. The support plates 9 are connected by a mounting shaft 17. The mounting shaft 17 is rotatably connected to the support plates 9 by high-precision bearings at both ends, so that the mounting shaft 17 can achieve stable circumferential rotation around its own axis.

[0036] One end of the mounting shaft 17 is connected to a drive motor 13, which is a brake motor type. During normal operation, it drives the mounting shaft 17 to rotate in steps at a set angle to achieve the rotation of different welding positions. In the power-off state, it can automatically lock the rotation position to prevent deflection during the welding process.

[0037] A first mounting plate 11 is fixedly mounted on the mounting shaft 17, and a second mounting plate 8 is slidably mounted on it. The first mounting plate 11 is fixed to the mounting shaft 17 by fastening screws and does not participate in axial movement; the second mounting plate 8 is engaged with a first locking nut 7 through a threaded section on the shaft. The operator can rotate the first locking nut 7 to push the second mounting plate 8 towards the first mounting plate 11 along the thread, thereby adjusting the distance between the two.

[0038] Several first mounting rods 10 and second mounting rods 6 are respectively mounted on the outer circumference of the first mounting plate 11 and the second mounting plate 8. Typically, six or eight stations are set per circumference, depending on the size of the welded product. Each first mounting rod 10 and second mounting rod 6 is connected to the mounting plate via a mounting lug 14. The mounting lug 14 is a raised structure with a through hole. A rotating pin passes through this through hole and connects to the mounting rod, and is secured at the end of the pin with a second locking nut to prevent loosening. The mounting rod can be adjusted by a small angle relative to the mounting plate to accommodate welded products of different sizes.

[0039] A welding position is formed between each pair of first mounting rods 10 and second mounting rods 6. The opposing surfaces of the first mounting rods 10 and second mounting rods 6 are provided with positioning grooves 19 for accommodating the welded parts. The shape of the positioning grooves 19 closely matches the shape of the welded product to achieve stable clamping. A locking screw 20 is provided on one side of the positioning groove 19 to press the welded parts installed in the groove. The welded parts are divided into a first welded part 12 and a second welded part 5, which are respectively installed on the first mounting rod 10 and the second mounting rod 6. When the operator tightens the first locking nut 7, it moves the second mounting plate 8 inward, causing the welding end face of the second welded part 5 to press against the welding end face of the first welded part 12, completing the connection and forming a ready-to-weld state.

[0040] The first mounting rod 10 and the second mounting rod 6 are arranged in a herringbone pattern, that is, the two rods form a certain angle between them, so that the butt weld of the two welded parts is fully exposed to the outside world, which makes it easy for the flame nozzles 15 in four directions to directly act on the welding area, ensuring that the flame can heat the weld from multiple angles, improving the welding integrity and efficiency, and avoiding the problem of insufficient local welding caused by clamping and blocking in traditional structures.

[0041] When the machine is working, the operator first installs the parts to be welded in all the workstations, and completes the positioning and clamping by locking screws 20 and first locking nuts 7. Then, the drive motor 13 makes the mounting shaft 17 rotate, and rotates the first welding position to be directly below the flame nozzle 15.

[0042] The drive cylinder 1 lowers the flame welding device to heat and weld the weld seam from all angles. After welding, it rises, and the mounting shaft 17 rotates to switch to the next station, completing welding at all stations in sequence. Because multiple products can be installed, welded alternately, and loaded and unloaded centrally, work efficiency is greatly improved, making it suitable for high-strength welding operations of large batches of aluminum pipe fittings.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A flame brazed aluminium pipe welding machine, characterised in that, include: A flame welding device is mounted on a main support (4), and the flame welding device is capable of moving up and down. A rotating mounting frame is installed at the lower end of the flame welding device. The rotating mounting frame has one or more welding positions arranged in a circle. The product to be welded is positioned and installed in the welding position. After the flame welding device descends, it performs flame welding on the product to be welded at the top welding position.

2. The flame brazing machine for aluminum pipe as set forth in claim 1, wherein: The rotating mounting bracket includes: Two support plates (9); The mounting shaft (17) is rotatably mounted on the two support plates (9) via bearings; The first mounting plate (11) and the second mounting plate (8) are fixedly mounted on the mounting shaft (17) and slidably mounted on the mounting shaft (17). A threaded section is provided at the mounting shaft (17) position on the outer end of the second mounting plate (8), and a first locking nut (7) is installed on the threaded section. The second mounting plate (8) is pushed towards the first mounting plate (11) by the first locking nut (7). One or more first mounting rods (10) and one or more second mounting rods (6) are arranged around the first mounting plate (11), and one or more second mounting rods (6) are arranged around the second mounting plate (8). The product to be welded is positioned and installed in the first mounting rods (10) and the second mounting rods (6).

3. The flame brazing machine for aluminum pipe as set forth in claim 2, wherein: The first mounting rod (10) and the second mounting rod (6) are provided with positioning grooves (19) on their opposite surfaces. The product to be welded includes a first welding part (12) and a second welding part (5). The first welding part (12) is positioned and installed in the first mounting rod (10), and the second welding part (5) is positioned and installed in the second mounting rod (6). The second mounting plate (8) is pushed by the first locking nut (7), so that the welding end of the second welding part (5) is pressed against the welding end of the first welding part (12).

4. The flame brazing machine for aluminum pipe as set forth in claim 3, wherein: The mounting shaft (17) is driven to rotate in a circular direction by a drive motor (13). The drive motor (13) is a brake motor, which locks its degree of freedom in the circumferential direction when the power is off. The drive motor (13) is fixedly mounted on the support plate (9) by a motor bracket (18).

5. The flame-aluminum-pipe welding machine according to claim 4, characterized in that: Both the first mounting plate (11) and the second mounting plate (8) are provided with mounting ears (14). Both the first mounting rod (10) and the second mounting rod (6) are rotatably mounted on the mounting ears (14) by a rotating pin. One end of the rotating pin is provided with a second locking nut.

6. The flame welding machine for aluminum tubes according to claim 5, characterized in that: The first mounting rod (10) and the mounting rod are provided with locking screws (20) on one side of the positioning groove (19), and the welding parts installed in the positioning groove (19) are pressed by the locking screws (20).

7. The flame welding machine for aluminum tubes according to claim 1, characterized in that: The flame welding device includes a cylinder frame (2) fixedly installed on the top of the main support (4) and a drive cylinder (1) installed on the top of the cylinder frame (2). The output end of the drive cylinder (1) is connected to a fixed box (3). A metal tube (16) that can be bent and deformed arbitrarily is installed on each of the four sides of the fixed box (3). A flame nozzle (15) is installed at the output end of each metal tube (16). The input end of the fixed box (3) is connected to a combustion gas source.

8. The flame welding machine for aluminum tubes according to claim 7, characterized in that: A flame focusing cavity is formed between the four flame nozzles (15), and the product to be welded is located in the flame focusing cavity during welding.

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