Welding device for main shell of air conditioner compressor

Abstract

The invention discloses an air conditioner compressor main shell welding device which comprises a rack, a rotating table and a transferring frame are oppositely arranged on the rack, a first fixing piece used for clamping a lower cover is arranged on the transferring frame, the transferring frame is adapted to move towards one side of the rotating table, so that the lower cover presses a main body on the rotating table, the rotating table is adapted to rotate, and the rotating table is adapted to move towards one side of the rotating table. Therefore, the main body and the lower cover are driven to rotate synchronously, and a welding gun is further arranged on the rack. The lower cover is pressed on the main body through transferring of the transferring frame, and then the rotating table can drive the lower cover and the main body to rotate synchronously, so that an annular welding path can be formed between the welding gun and a welding seam. Compared with the prior art, on one hand, clamping of the lower cover and the main body is more convenient, and on the other hand, the stability of a welding path is improved through active rotation of the rotating table, so that the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of air-conditioning compressor manufacturing, and in particular to a welding device for a main shell of an air-conditioning compressor. Background Art

[0002] Air conditioning, or air conditioner, refers to equipment that uses artificial means to adjust and control the temperature, humidity, flow rate and other parameters of the ambient air in a building or structure. It generally includes several parts such as cold source / heat source equipment, cold and hot medium distribution system, terminal device and other auxiliary equipment, mainly including refrigeration host, compressor, water pump, fan and pipeline system. The terminal device is responsible for using the cold and heat distributed to specifically process the air state so that the air parameters of the target environment meet the requirements. Among them, the compressor needs to be welded on the main shell during the manufacturing process.

[0003] The compressor main shell generally includes a main body and an upper cover and a lower cover welded on both sides of the main body. In the specific manufacturing process, the lower cover needs to be welded to the main body first to facilitate the placement of internal components, and then the upper cover is welded. At present, the welding of the lower cover is mostly done manually, especially the manual rotation of the shell is required to satisfy the welding path formed by the welding gun. Due to the interference of human factors, the quality of welding cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a welding device for a main housing of an air-conditioning compressor.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A welding device for the main shell of an air-conditioning compressor comprises a frame, on which a rotating table and a transfer rack are arranged opposite to each other, on which a first fixing member for clamping a lower cover is arranged, and the transfer rack is adapted to be able to move toward one side of the rotating table so that the lower cover presses the main body against the rotating table, and the rotating table is adapted to be able to rotate, thereby driving the main body and the lower cover to rotate synchronously, and a welding gun is also arranged on the frame.

[0007] Preferably, a second fixing member for clamping the main body is provided on the rotating table.

[0008] Preferably, an ejector is provided on the frame, a mounting seat is provided on the ejector shaft of the ejector, and the transfer rack is rotatably connected to the mounting seat.

[0009] Preferably, the first fixing member and the second fixing member are both electromagnets.

[0010] Preferably, a fixed cylinder is provided at the center of the rotating table, and a gas nozzle is provided on the side wall of the end of the fixed cylinder. The inner cavity of the fixed cylinder is adapted to be engaged with an air pumping mechanism, and the air pumping mechanism is adapted to be able to introduce cooling gas into the fixed cylinder, and the gas nozzle is aligned with the welding gun.

[0011] Preferably, the gas nozzle is adapted to be able to be pushed out in radial direction, thereby changing the distance from the welding point.

[0012] Preferably, a driving rod is sealingly and slidingly connected inside the fixed cylinder, and a return spring is connected to the driving rod, and the return spring is used to push the driving rod away from the fixed cylinder; a driving cylinder is radially protrudingly provided on the side wall of the end of the fixed cylinder, and the air nozzle is provided on the driving cylinder; a transmission mechanism is adapted between the driving rod and the driving cylinder, and the transmission mechanism is adapted to be able to drive the driving cylinder to be ejected as the driving rod is pressed downward.

[0013] Preferably, two driving cylinders are arranged along the circumferential direction, and a sealing plate is also arranged on the frame, one of the two driving cylinders is aligned with the welding gun, and the other of the two driving cylinders is aligned with the sealing plate; the transmission mechanism is also adapted to be able to drive the two driving cylinders to be ejected to different degrees, so that there is a gap between the driving cylinder corresponding to the welding gun and the inner wall of the main body, while the driving cylinder corresponding to the sealing plate is in contact with the inner wall of the main body; the sealing plate is adapted to fit against the outer wall of the main body, and a detection component for detecting whether airflow is passed is also provided on the fitting surface of the sealing plate.

[0014] Preferably, the transmission mechanism comprises a driving inclined surface arranged on the side wall of the driving rod, and a return spring is also connected between the driving cylinder and the fixed cylinder to drive the end of the driving cylinder to abut against the driving inclined surface.

[0015] Preferably, a mounting groove is provided on the fitting surface of the blocking plate, and the detection component comprises an airflow sensor or an air pressure sensor arranged in the mounting groove.

[0016] The beneficial effects of the present invention are:

[0017] 1. The lower cover is pressed against the main body by the transfer rack, and then the rotating table can drive the lower cover and the main body to rotate synchronously, so that a circular welding path can be formed between the welding gun and the welding seam. Compared with the prior art, the present invention makes it more convenient to clamp the lower cover and the main body, and also improves the stability of the welding path through the active rotation of the rotating table, so that the welding quality is guaranteed.

[0018] 2. A fixed cylinder extending into the main body is arranged on the rotating table, and an air nozzle is arranged on the inner wall of the fixed cylinder. Cooling gas is pumped into the fixed cylinder through the air pump mechanism, and then the air nozzle can spray the gas to the welding point to achieve heat dissipation on the inner wall of the main body.

[0019] 3. The online detection of the weld can be realized by the abutment between the fixed cylinder and the inner wall of the main body and the cooperation with the external sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment;

[0021] Figure 2 It is a schematic diagram of the operation process of the embodiment;

[0022] Figure 3 is a schematic diagram of the cross-sectional structure of the plugging plate;

[0023] Figure 4 It is a structural schematic diagram of the screw ejection mechanism.

[0024] Figure numerals: 1. frame; 2. rotating table; 3. transfer rack; 4. first fixing part; 5. welding gun; 6. second fixing part; 7. ejector; 8. mounting seat; 9. fixing cylinder; 10. air nozzle; 11. driving rod; 12. driving cylinder; 13. transmission mechanism; 14. sealing plate; 15. detection part; 16. driving inclined surface; 17. mounting groove; 18. screw ejector structure; 19. rack; 20. gear; 21. lower cover; 22. main body. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] like Figures 1 to 4 As shown, a welding device for the main housing of an air-conditioning compressor includes a frame 1, for example, a mounting frame is mounted on the frame 1, an ejector 7 is arranged on the mounting frame, a mounting seat 8 is arranged on the ejector shaft of the ejector 7, and a transfer frame 3 is rotatably connected to the bottom end of the mounting seat 8. In addition, a rotating table 2 is rotatably arranged on the table surface of the frame 1.

[0027] For example, the transfer rack 3 may be provided with a first fixing member 4, and the rotary table 2 may be provided with a second fixing member 6. Specifically, the first fixing member 4 is adapted to clamp and fix the lower cover 21 to the transfer rack 3, and the second fixing member 6 is used to clamp and fix the main body 22 to the rotary table 2. During welding, the transfer rack 3 moves toward one side of the rotary table 2 under the ejection of the ejector 7 until the lower cover 21 is pressed against the main body 22. Subsequently, the rotary table 2 rotates and drives the main body 22 and the lower cover 21 to rotate synchronously, and at this time, the welding gun 5 set on the column of the mounting frame can weld the welding seam of the workpiece in a circular welding path.

[0028] In some embodiments, the first fixing member 4 and the second fixing member 6 can both be electromagnets, and convenient clamping and releasing of the workpiece can be achieved by controlling the on and off of the electromagnets. The ejector 7 can be preferably a cylinder, and of course other ejector solutions such as electric cylinders and hydraulic cylinders are not excluded as options for the ejector 7.

[0029] Generally speaking, the cooling and heat dissipation of the workpiece is carried out simultaneously with welding, which will help the workpiece achieve a better welding effect, such as preventing the workpiece from being easily deformed and helping to reduce residual stress and cracks generated during the welding process of the workpiece. In the prior art, there is a heat dissipation solution that uses an air cooling mechanism to blow and cool the outer side of the shell, but this solution cannot achieve cooling of the inner wall of the main body 22. When the main body 22 is clamped and fixed with the rotating table 2, a relatively closed cavity is maintained inside it, which will cause overheating of the inner side of the main body 22.

[0030] In view of the above technical problems, in the present invention, a fixed cylinder 9 is further provided at the center of the rotating table 2, that is, the fixed cylinder 9 passes through the rotating table 2 upwards and is not rigidly connected to the rotating table 2. A gas nozzle 10 is further provided on the side wall of the end of the fixed cylinder 9, and the gas nozzle 10 is aligned with the position of the welding gun 5. In addition, the inner cavity of the fixed cylinder 9 is also connected to a gas pump mechanism.

[0031] During the welding process, the gas pumping mechanism can pump cooling gas into the fixed cylinder 9. For example, the cooling gas can be an inert gas, but the specific gas type can be selected according to the welding process. Then, the cooling gas will flow and be ejected from the gas nozzle 10 to achieve heat dissipation on the inside of the weld. The gas pumping mechanism can adopt a common gas pump device, which will not be described in detail in this disclosure.

[0032] In some embodiments, the air nozzle 10 can also be preferably adapted to be able to be pushed out in the radial direction, which will help change the distance between the air nozzle 10 and the welding point. On the one hand, the air nozzle 10 and the welding point can be kept relatively close to each other so that the air flow can have a maximum heat dissipation effect on the welding seam; on the other hand, when the air nozzle 10 is retracted into one side of the fixed cylinder 9, it will be easier to clamp the main body 22 to the rotating table 2, that is, it is not easy for the air nozzle 10 to hinder the installation action of the main body 22 being sleeved on the outside of the fixed cylinder 9.

[0033] For example, the radial ejection of the gas nozzle 10 can also be achieved by ejecting the ejector 7 similar to the above. In order to reduce the complexity of the system control of the welding device, the present disclosure provides another preferred example:

[0034] In this example, the fixed cylinder 9 is adapted to be sealed and slidably connected with the driving rod 11, and a return spring (not shown) is also provided in the fixed cylinder 9, which exerts an elastic force on the driving rod 11 to push it away from the fixed cylinder 9. Therefore, when the transfer rack 3 is pushed out to one side of the rotating table 2, the lower cover 21 will first abut against the driving rod 11 before being pressed against the main body 22, and then the driving rod 11 will be gradually pressed into the fixed cylinder 9.

[0035] A driving cylinder 12 is provided on the side wall of the end of the fixing cylinder 9 so as to be ejected radially, and the air nozzle 10 is provided on the driving cylinder 12. In addition, a transmission mechanism 13 is adapted between the driving rod 11 and the driving cylinder 12, and the transmission mechanism 13 is adapted so that the driving cylinder 12 is ejected when the driving rod 11 is pressed downward.

[0036] For example, a return spring may be connected between the driving cylinder 12 and the fixed cylinder 9, and the transmission mechanism 13 may include a driving inclined surface 16 disposed on the side wall of the driving rod 11. Under the action of the elastic force, the end of the driving cylinder 12 will always abut against the driving inclined surface 16, and as the driving rod 11 is pressed downward, the driving inclined surface 16 will gradually push the driving cylinder 12 to be ejected.

[0037] like Figure 4 As shown, as another solution, the connection between the drive cylinder 12 and the fixed cylinder 9 is achieved through a screw ejection structure 18. In detail, a screw is rotatably provided at the opening of the side wall of the fixed cylinder 9, and the drive cylinder 12 is provided on the screw nut. As for other assembly relationships and structures of the screw ejection structure 18, they are prior art and will not be described in detail in this disclosure. The transmission mechanism 13 may include a rack 19 provided on the side wall of the driving rod 11, and a gear 20 may be provided at the end of the screw. The gear 20 is driven to rotate by the downward pressure of the rack 19, thereby driving the drive cylinder 12 to be ejected. Preferably, the screw may be a hollow structure, so as to facilitate the gas to pass through the screw into the drive cylinder 12.

[0038] Unlike other welding operations, the compressor shell needs to maintain sealing performance to prevent unexpected air leakage during operation. Therefore, the present disclosure also adapts the drive cylinder 12 to be arranged in two along the circumferential direction, and the frame 1 is also provided with a blocking plate 14 aligned with the welding seam of the workpiece. For the sake of convenience, the two drive cylinders 12 are defined as the first drive cylinder 12 and the second drive cylinder 12, respectively, wherein the first drive cylinder 12 is aligned with the welding gun 5, and the second drive cylinder 12 is aligned with the blocking plate 14.

[0039] The difference between the two drive cylinders 12 is that the air nozzle 10 on the first drive cylinder 12 needs to spray out smooth airflow for heat dissipation of the welding point, so there should be a gap between the end of the first drive cylinder 12 and the main body 22. The second drive cylinder 12 is adapted to fit the inner wall of the main body 22. Under normal circumstances, the airflow in the second drive cylinder 12 cannot be sprayed out due to the stop of the main body 22. The function of the second drive cylinder 12 will be detailed below.

[0040] Therefore, the transmission mechanism 13 is also adapted to drive the two driving cylinders 12 to be ejected to different degrees, so as to ensure that there is a gap between the first driving cylinder 12 and the main body 22 and the second driving cylinder 12 fits the inner wall of the main body 22 .

[0041] In the example where the transmission mechanism 13 is a driving inclined surface 16, the two driving inclined surfaces 16 may have different inclination angles. For example, the inclination angle of the driving inclined surface 16 corresponding to the first driving cylinder 12 may be smaller than the inclination angle of the driving inclined surface 16 corresponding to the second driving cylinder 12. When the driving rod 11 is pressed down, although the pressing distance of the driving rod 11 is constant, due to the different slopes of the two driving inclined surfaces 16, the driving inclined surface 16 with a larger slope will push the corresponding driving cylinder 12 to eject a larger stroke.

[0042] In the example where the transmission mechanism 13 is a rack 19, the two sets of racks 19 and gears 20 can be adapted to have different transmission ratios. The selection of the transmission ratio is known to those skilled in the art, so it will not be described in detail. Similarly, when the drive rod 11 is pressed down, although the pressing distance of the drive rod 11 is constant, due to the different transmission ratios of the two sets of racks 19 and gears 20, the second drive cylinder 12 will have a larger ejection stroke than the first drive cylinder 12.

[0043] like Figure 2 , Figure 3 As shown, the blocking plate 14 is adapted to fit the outer wall of the main body 22, and a mounting groove 17 is also provided on the fitting surface of the blocking plate 14, and an airflow detection component 15 such as an airflow sensor or an air pressure sensor is provided in the mounting groove 17. In a specific welding operation, as the rotating table 2 rotates, the weld will gradually approach the side of the second driving cylinder 12. Under normal circumstances, there is no leakage in the weld, and the second driving cylinder 12 cannot spray airflow under the stop of the inner wall of the main body 22; but when leakage occurs, the gas in the second driving cylinder 12 will spray out from the leakage point and merge into the side of the blocking plate 14. At this time, the detection component 15 can detect the passage of the airflow, so as to determine the occurrence of leakage.

[0044] For example, the rotation position of the rotating table 2 can be recorded when a leaky weld occurs, and after the initial welding operation is completed, the rotating table 2 can be controlled to rotate so that the leaky weld point is opposite to the welding gun 5 to achieve leak repair welding of the leaky weld point. The rotating table 2 can preferably be driven by a servo motor to achieve rotation, so as to facilitate recording the position of the leaky weld point.

[0045] In a preferred example, the circumferential angle between the first drive cylinder 12 and the second drive cylinder 12 is 30-45 degrees, which allows the second drive cylinder 12 to have a certain distance from the welding point, and is not prone to overheating damage. At the same time, it can also achieve the maximum online detection of the weld of the main body 22 during a single rotation of the rotating table 2. Figure 1 In the figure, the first drive cylinder 12 and the second drive cylinder 12 are opposite to each other, that is, the circumferential angle between the two is 90 degrees. Of course, after the initial welding operation is completed, the welding gun 5 can be controlled not to operate, and only the rotating table 2 can be controlled to rotate. At this time, the second drive cylinder 12 will perform a complete inspection on the weld. It can be understood that this will also help the first drive cylinder 12 to quickly dissipate heat from the weld after the workpiece is welded.

[0046] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A welding device for a main housing of an air-conditioning compressor, comprising a frame (1), characterized in that: The frame (1) is provided with a rotating table (2) and a transfer frame (3) opposite to each other. The transfer frame (3) is provided with a first fixing member (4) for clamping the lower cover. The transfer frame (3) is adapted to be able to move toward one side of the rotating table (2), so that the lower cover presses the main body against the rotating table (2). The rotating table (2) is adapted to be able to rotate, thereby driving the main body and the lower cover to rotate synchronously. A welding gun (5) is also provided on the frame (1).

2. The air-conditioning compressor main housing welding device according to claim 1 is characterized in that: The rotating platform (2) is provided with a second fixing member (6) for clamping the main body.

3. The main housing welding device of the air conditioner compressor according to claim 1 is characterized in that: The frame (1) is provided with an ejector (7), an ejector shaft of the ejector (7) is provided with a mounting seat (8), and the transfer rack (3) is rotatably connected to the mounting seat (8).

4. The air-conditioning compressor main housing welding device according to claim 2 is characterized in that: The first fixing member (4) and the second fixing member (6) are both electromagnets.

5. The air-conditioning compressor main housing welding device according to any one of claims 1 to 4, characterized in that: A fixed cylinder (9) is arranged at the center of the rotating table (2), and a gas nozzle (10) is arranged on the side wall of the end of the fixed cylinder (9). The inner cavity of the fixed cylinder (9) is adapted to be connected with a gas pump mechanism, and the gas pump mechanism is adapted to be able to pass cooling gas into the fixed cylinder (9), and the gas nozzle (10) is aligned with the welding gun (5).

6. The main housing welding device for an air-conditioning compressor according to claim 5, characterized in that: The gas nozzle (10) is adapted to be able to be pushed out in the radial direction, thereby changing the distance from the welding point.

7. The air-conditioning compressor main housing welding device according to claim 6 is characterized in that: A driving rod (11) is sealingly and slidably connected inside the fixed cylinder (9), and a return spring is connected to the driving rod (11), and the return spring is used to push the driving rod (11) away from the fixed cylinder (9); A driving cylinder (12) is provided on the side wall of the end of the fixing cylinder (9) so as to be protruded in the radial direction, and the air nozzle (10) is provided on the driving cylinder (12); A transmission mechanism (13) is adapted between the driving rod (11) and the driving cylinder (12), and the transmission mechanism (13) is adapted to be able to drive the driving cylinder (12) to be ejected as the driving rod (11) is pressed downward.

8. The air-conditioning compressor main housing welding device according to claim 7 is characterized in that: Two driving cylinders (12) are arranged along the circumferential direction, and a blocking plate (14) is also arranged on the frame (1), one of the two driving cylinders (12) is aligned with the welding gun (5), and the other of the two driving cylinders (12) is aligned with the blocking plate (14); The transmission mechanism (13) is also adapted to drive the two driving cylinders (12) to be ejected to different degrees, so that a gap exists between the driving cylinder (12) corresponding to the welding gun (5) and the inner wall of the main body, while the driving cylinder (12) corresponding to the blocking plate (14) abuts against the inner wall of the main body; The blocking plate (14) is adapted to be fitted to the outer wall of the main body, and a detection member (15) for detecting whether airflow is introduced is also provided on the fitting surface of the blocking plate (14).

9. The air-conditioning compressor main housing welding device according to claim 7 or 8, characterized in that: The transmission mechanism (13) comprises a driving inclined surface (16) arranged on the side wall of the driving rod (11), and a return spring is also connected between the driving cylinder (12) and the fixed cylinder (9) to drive the end of the driving cylinder (12) to abut against the driving inclined surface (16).

10. The air-conditioning compressor main housing welding device according to claim 8, characterized in that: The sealing plate (14) has a mounting groove (17) on its fitting surface, and the detection element (15) comprises an airflow sensor or an air pressure sensor arranged in the mounting groove (17).

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