A multi-station welding tool

Abstract

The patent application belongs to the technical field of welding, and particularly relates to a multi-station welding tool, which comprises a rotating disc, a workpiece positioning structure is arranged on the rotating disc at a position close to an outer edge, a first positioning seat comprises a mounting seat and a nitrogen pipe, the mounting seat is arranged on the upper side of the nitrogen pipe, a positioning hole is arranged on the top of the mounting seat, a through hole in communication with the nitrogen pipe is arranged at the bottom of the positioning hole, the diameter of the positioning hole is D1, the diameter of the through hole is d, D1>d, a shunt body is inserted into the positioning hole and the end of the shunt body is abutted against a shaft shoulder; a locking piece is arranged in the positioning hole and is used for locking the shunt body; the second positioning seat comprises a vertical rod, a mounting plate vertically slides on the vertical rod, a positioning plate horizontally slides on the mounting plate, an arc-shaped clamping groove matched with a branch pipe is arranged on the upper side of the positioning plate, the upper end of the branch pipe is clamped in the clamping groove, and the lower end is aligned with the shunt body for welding. The positioning structure of the welding part is optimized, quick positioning can be realized, and the welding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a multi-station welding fixture. Background Technology

[0002] The refrigerant delivery pipeline system is an important component of the air conditioning refrigeration cycle. After the refrigerant is discharged from the compressor, it is condensed by the condenser, then enters the distributor through the main pipe, and finally the distributor evenly distributes the refrigerant to multiple branch pipes, delivering it to different circuits of the evaporator to achieve refrigeration.

[0003] To ensure the airtightness of the refrigerant delivery pipe connections, the distributor and each branch pipe are typically fixed together by welding. However, since maintaining the stability of both components is necessary during welding, each component needs to be fixed separately. But the current method of fixing the two components is quite complex, affecting welding efficiency. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-station welding fixture to achieve rapid positioning welding.

[0005] The technical solution adopted in this utility model is as follows: A multi-station welding fixture includes a rotating disk. A workpiece positioning structure is provided on the rotating disk near its outer edge. The workpiece positioning structure includes a first positioning seat and a second positioning seat. The first positioning seat is located on one side of the second positioning seat. The first positioning seat includes a mounting base and a nitrogen pipe. The mounting base is located above the nitrogen pipe. The top of the mounting base has a positioning hole, and the bottom of the positioning hole has a through hole communicating with the nitrogen pipe. The diameter of the positioning hole is D1, and the diameter of the through hole is d, where D1>d. A branch body is inserted into the positioning hole, and its end abuts against a shoulder. A locking element is provided in the positioning hole to lock the branch body. The second positioning seat includes a vertical rod, on which a mounting plate slides vertically. A positioning plate slides horizontally on the mounting plate. The upper side of the positioning plate has an arc-shaped groove for cooperating with a branch pipe. The branch pipe is placed vertically, and its upper part is locked in the horizontally set groove. The lower end of the branch pipe is aligned with the branch body for welding.

[0006] Compared with the prior art, the working principle and beneficial effects of this utility model are as follows: The first positioning seat is used to position the branch pipe. During positioning, the branch pipe is inserted into the positioning hole. When the branch pipe moves down to the shoulder position, it stops moving further due to the axial limiting effect of the shoulder. A locking element is provided in the positioning hole, which locks the branch pipe after it reaches the positioning position, thereby achieving lateral limiting of the branch pipe and ensuring its stability during welding. Through the dual axial and lateral limiting of the branch pipe, the upper end of the branch pipe can be precisely aligned with the welding position of the branch pipe, thus ensuring the stability of the welded structure.

[0007] The second positioning seat is used to position the branch pipe. Before positioning, the horizontal and vertical positions of the positioning plate can be adjusted to adapt to different branch pipe shapes. Specifically, the positioning plate can slide horizontally on the mounting plate to adjust its horizontal position; the mounting plate can slide vertically on the vertical rod to adjust the vertical height of the positioning plate. During branch pipe positioning, the branch pipe is placed vertically, and its upper part is simply inserted into the slot on the positioning plate to achieve quick positioning of the branch pipe. The slot is a horizontally set groove structure, which can both fix the branch pipe vertically and prevent it from shifting horizontally, ensuring that the lower end of the branch pipe is precisely aligned with the upper end of the branch body, facilitating welding operations.

[0008] Because the refrigerant delivery pipes need to adapt to the installation layout of the indoor air conditioning unit, and the branch pipes have various bending shapes, the second positioning seat not only enables rapid positioning but also has good versatility and adaptability. By adjusting the horizontal and vertical positions of the positioning plate, it can accommodate branch pipe structures of different shapes, demonstrating strong versatility.

[0009] In a preferred embodiment of this utility model, the mounting plate is L-shaped, with the long plate of the mounting plate passing through the vertical rod. One side of the mounting plate is threaded with a set bolt for fixing the mounting plate. A groove is opened on the side of the long plate of the mounting plate where the short plate is located. A slider is fixed on the positioning plate in cooperation with the groove. The slider cooperates with the groove. A driving component is also provided on the positioning plate, which is used to drive the positioning plate to slide horizontally.

[0010] In a preferred embodiment of the present invention, the driving component includes a slide rod fixed on the positioning plate near the short plate. The slide rod passes through the short plate and slides horizontally on the short plate. A locking bolt for fixing the slide rod is threaded to one side of the short plate.

[0011] In a preferred embodiment of this utility model, the locking component includes a locking bolt threaded to one side of the mounting base, which abuts against the outer wall of the branch body after passing through the positioning hole.

[0012] In a preferred embodiment of this utility model, an installation cavity is provided between the positioning hole and the through hole, the diameter of the installation cavity is D2, D2>D1, and a locking member is provided in the installation cavity; the locking member includes an installation ring, and multiple clamping plates are hinged to the inner side wall of the installation ring. The multiple clamping plates are evenly distributed in the circumference of the installation ring. When the branch body is inserted into the installation ring, the multiple clamping plates clamp the branch body. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the workpiece positioning structure in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the mounting base in Embodiment 1 of this utility model; Figure 4 This is a cross-sectional view of the mounting base in Embodiment 2 of this utility model; Figure 5 This is a cross-sectional view of the mounting base in Embodiment 3 of this utility model; Figure 6 This is a schematic diagram of the locking component in Embodiment 3 of this utility model.

[0014] The reference numerals in the attached drawings include: rotating disk 1, workpiece positioning structure 2, first positioning seat 21, mounting seat 211, positioning hole 2111, through hole 2112, mounting cavity 2113, mounting ring 214, clamping plate 2141, cover plate 215, first support plate 2151, second support plate 2152, spring 216, nitrogen pipe 212, locking bolt 213, second positioning seat 22, vertical rod 221, mounting plate 222, positioning plate 223, slot 2231, sliding rod 224, nut 225, set bolt 226, locking bolt 227, welding position 3, cooling position 4, branch body 5, branch pipe 6. Detailed Implementation

[0015] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0016] In the description of this application, the terms "first", "second", etc. are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Example

[0017] See Figure 1 As shown, this embodiment discloses a multi-station welding fixture, including a frame, a rotating disk 1 mounted on the frame, and a workpiece positioning structure 2 mounted on the rotating disk 1 near its outer edge. In this embodiment, two workpiece positioning structures 2 form a group, and four groups are evenly arranged circumferentially on the welding table. The two workpiece positioning structures 2 can be used to position two different types of branch pipes 6 respectively, or they can be used to position the same type of branch pipe 6.

[0018] On the outer side of the rotating disk 1, the frame is provided with an assembly position, a welding position 3, and a cooling position 4. The welding position 3 and the cooling position 4 are respectively equipped with welding structures and air-cooling structures for the two workpiece positioning structures 2. In this embodiment, the welding structure and the air-cooling structure are existing technologies and will not be described in detail here.

[0019] See Figure 2 and Figure 3As shown, the workpiece positioning structure 2 includes a first positioning seat 21 and a second positioning seat 22. The first positioning seat 21 is located on one side of the second positioning seat 22 and is used to position the branch body 5. Specifically, the first positioning seat 21 includes a mounting seat 211 and a nitrogen pipe 212. The mounting seat 211 is fixed to the upper side of the nitrogen pipe 212. The top of the mounting seat 211 has a positioning hole 2111, and the bottom of the positioning hole 2111 has a through hole 2112 communicating with the nitrogen pipe 212. The diameter of the positioning hole 2111 is D1, and the diameter of the through hole 2112 is d, where D1>d. The branch body 5 is inserted into the positioning hole 2111. When the branch body 5 is inserted into the positioning hole 2111 and moves down to the shoulder position, the branch body 5 stops moving down due to the axial limiting effect of the shoulder.

[0020] A locking element is provided in the positioning hole 2111 to lock the branch body 5. Specifically, the locking element includes a locking bolt 213 threaded to one side of the mounting base 211. In use, the locking bolt 213 is tightened so that it abuts against the outer wall of the branch body 5 after passing through the positioning hole 2111.

[0021] The second positioning seat 22 is used to position the branch pipe 6. Specifically, the second positioning seat 22 includes a vertical rod 221, on which a mounting plate 222 slides vertically. The mounting plate 222 is L-shaped, and the long plate of the mounting plate 222 passes through the vertical rod 221. A set bolt 226 is threadedly connected to one side of the mounting plate 222. The mounting plate 222 is fixed by tightening the set bolt 226, and the fixing method is the same as that of the locking bolt 213.

[0022] A positioning plate 223 slides horizontally on the mounting plate 222. The upper side of the positioning plate 223 has an arc-shaped groove 2231 for the branch pipe 6. The branch pipe 6 is vertically positioned, its upper part is engaged in the horizontally positioned groove 2231, its end abuts against the outer wall of the mounting plate 222, and its lower end is aligned with the branch body 5 for welding. Specifically, a sliding groove is formed on the side of the mounting plate 222 where the short plate is located. A slider is fixed to the positioning plate 223 to cooperate with the sliding groove. The slider cooperates with the sliding groove. The positioning plate 223 also has a driving component for driving the horizontal sliding of the positioning plate 223. The driving component includes a sliding rod 224 fixed to the positioning plate 223 near the short plate. The sliding rod 224 passes through the short plate and slides horizontally on the short plate. A nut 225 is bolted to one end of the sliding rod 224 that extends outward from the short plate to prevent the sliding rod 224 from dislodging from the short plate. One side of the short plate is threaded with a locking bolt 227 for fixing the slide bar 224, wherein the fixing method of the locking bolt 227 is the same as that of the locking bolt 213.

[0023] Because the refrigerant delivery pipe needs to adapt to the installation layout of the indoor air conditioning unit, and the branch pipe 6 has various bending shapes, the horizontal and vertical positions of the positioning plate 223 can be adjusted before positioning the branch pipe 6 to accommodate different branch pipe 6 structures. Specifically, the positioning plate 223 can slide horizontally on the mounting plate 222 to adjust its horizontal position; the mounting plate 222 can slide vertically on the vertical rod 221 to adjust the vertical height of the positioning plate 223. During positioning, simply place the branch pipe 6 vertically, and its upper part will snap into the slot 2231 on the positioning plate 223. The operation is simple and convenient. Example

[0024] See Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that a mounting cavity 2113 is provided between the positioning hole 2111 and the through hole 2112. The diameter of the mounting cavity 2113 is D2, where D2 > D1. The locking element is installed on the upper side of the mounting cavity 2113. The locking element includes a mounting ring 214. Multiple clamping plates 2141 are hinged to the inner wall of the mounting ring 214 via torsion springs. These clamping plates 2141 are evenly distributed around the circumference of the mounting ring 214. Initially, the clamping plates 2141 are horizontal. When the branch body 5 is inserted into the mounting ring 214, the clamping plates 2141 are pressed downwards and rotate. Under the action of the torsion springs, the multiple clamping plates 2141 simultaneously clamp the branch body 5. This embodiment can achieve self-locking after the branch body 5 is inserted into the positioning hole 2111, further improving positioning efficiency. Example

[0025] See Figure 5 and Figure 6 As shown, the difference between this embodiment and Embodiment 2 is that a cover plate 215 is provided below the mounting ring 214, and a spring 216 is provided between the annular groove and the cover plate 215. Specifically, an annular groove is provided on the lower side of the mounting ring 214, and the two ends of the spring 216 are respectively fixed to the bottom of the annular groove and the upper side of the cover plate 215. In the initial state, the cover plate 215 is placed on the lower side of the mounting ring 214 to block the channel in the middle of the mounting ring 214.

[0026] Furthermore, a first support plate 2151 and a second support plate 2152 are respectively provided on the upper and lower sides of the cover plate 215, both of which are radially arranged. By providing the first support plate 2151 and the second support plate 2152, when the branch body 5 is inserted into the positioning hole 2111, the lower end of the branch body 5 abuts against the first support plate 2151, and a first gap exists between the lower end of the branch body 5 and the cover plate 215. As it continues to move downwards, the second support plate 2152 abuts against the shoulder, and a second gap exists between the cover plate 215 and the through hole 2112. The first gap, the mounting cavity 2113, and the second gap form a nitrogen flow channel. In this embodiment, four first support plates 2151 and four second support plates 2152 are provided, and they are evenly distributed around the circumference of the cover plate 215.

[0027] During the welding process, nitrogen gas needs to be continuously introduced as a protective gas to prevent oxidation of the inner wall of the copper tube at high temperatures. However, nitrogen gas is inevitably wasted to a certain extent during the loading and unloading of the workpiece. In this embodiment, by setting a cover plate 215, the nitrogen flow channel can be automatically blocked when the branch body 5 is not installed, and the channel will automatically open after the branch body 5 is installed, thereby reducing nitrogen gas waste.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A multi-station welding fixture, characterized in that: The rotating disk has a workpiece positioning structure located near its outer edge. The workpiece positioning structure includes a first positioning seat and a second positioning seat, with the first positioning seat located on one side of the second positioning seat. The first positioning seat includes a mounting base and a nitrogen pipe. The mounting base is located on the upper side of the nitrogen pipe. The top of the mounting base is provided with a positioning hole, and the bottom of the positioning hole is provided with a through hole communicating with the nitrogen pipe. The diameter of the positioning hole is D1, and the diameter of the through hole is d, where D1>d. The branch body is inserted into the positioning hole and its end abuts against the shaft shoulder. A locking element is provided in the positioning hole to lock the branch body. The second positioning seat includes a vertical rod, on which a mounting plate slides vertically, and on which a positioning plate slides horizontally. The upper side of the positioning plate is provided with an arc-shaped groove for cooperating with the branch pipe. The branch pipe is placed vertically and its upper part is locked in the horizontally set groove. The lower end of the branch pipe is aligned with the branch body for welding.

2. The multi-station welding fixture according to claim 1, characterized in that: The mounting plate is L-shaped, with the long plate passing through the vertical rod. One side of the mounting plate is threaded with a set bolt for fixing the mounting plate. A groove is opened on the side of the long plate where the short plate is located. A slider is fixed on the positioning plate to fit the groove. The slider and the groove are engaged. A driving component is also provided on the positioning plate to drive the positioning plate to slide horizontally.

3. The multi-station welding fixture according to claim 2, characterized in that: The driving component includes a slide rod fixed to the positioning plate near the short plate. The slide rod passes through the short plate and slides horizontally on the short plate. A locking bolt for fixing the slide rod is threaded to one side of the short plate.

4. The multi-station welding fixture according to claim 3, characterized in that: The locking component includes a locking bolt threaded onto one side of the mounting base, which, after passing through the positioning hole, abuts against the outer wall of the branch body.

5. The multi-station welding fixture according to claim 3, characterized in that: An installation cavity is provided between the positioning hole and the through hole. The diameter of the installation cavity is D2, where D2 > D1. A locking element is located inside the installation cavity. The locking element includes an installation ring. Multiple clamping plates are hinged to the inner wall of the installation ring. The multiple clamping plates are evenly distributed around the circumference of the installation ring. When the branch body is inserted into the installation ring, the multiple clamping plates clamp the branch body.

Images