An air-conditioning compressor main housing welding device

Abstract

The present invention discloses a welding device for the main housing of an air-conditioning compressor, which comprises a frame. A rotary table and a transfer rack are oppositely arranged on the frame. A first fixing member for clamping the lower cover is arranged on the transfer rack. The transfer rack is adapted to be movable towards one side of the rotary table, so that the lower cover presses the main body against the rotary table. The rotary table is adapted to be rotatable, so as to drive the main body and the lower cover to rotate synchronously. A welding torch is also arranged on the frame. The lower cover is pressed against the main body through the transfer of the transfer rack. Subsequently, the rotary 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 torch and the welding seam. Compared with the prior art, on the one hand, the clamping of the lower cover and the main body in the present invention is more convenient. On the other hand, the stability of the welding path is improved by the active rotation of the rotary table, ensuring the welding quality.

Description

Technical Field

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

[0002] An air conditioner, that is, an air conditioner, refers to a device that uses artificial means to adjust and control parameters such as the temperature, humidity, and flow rate of the air in a building or structure. Generally, it includes a cold source / heat source device, a cold and hot medium distribution system, a terminal device, and other auxiliary devices. It mainly includes a refrigeration host, a compressor, a water pump, a fan, and a pipeline system. The terminal device is responsible for using the cold and heat transferred to specifically process the air state so that the air parameters of the target environment meet the requirements. Among them, the compressor needs to perform welding operations on the main housing during the manufacturing process.

[0003] The main housing of the compressor generally includes a main body and upper and lower covers welded to both sides of the main body. During the specific manufacturing process, the lower cover needs to be welded to the main body first to facilitate the placement of internal components, and finally the upper cover is welded. Currently, for the welding operation of the lower cover, most are carried out by manual welding, especially the need to manually rotate the housing to meet the welding gun to form an annular welding path. Due to the interference of human factors, the welding quality 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 the main housing of an air conditioner compressor.

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

[0006] A welding device for the main housing of an air conditioner compressor includes a frame. A rotating table and a transfer frame are oppositely arranged on the frame. A first fixing member for clamping the lower cover is arranged on the transfer frame. The transfer frame is adapted to be able to move towards the side of the rotating table, so that the lower cover presses the main body against the rotating table. The rotating table is adapted to be able to rotate, so as to drive the main body and the lower cover to rotate synchronously. A welding gun is also arranged on the frame.

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

[0008] Preferably, a jacking member is arranged on the frame. An installation seat is arranged on the jacking shaft of the jacking member. The transfer frame is rotatably connected to the installation seat.

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

[0010] Preferably, a fixed cylinder is provided at the center of the rotating table. An air 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 a gas pumping mechanism. The gas pumping mechanism is adapted to be able to introduce cooling gas into the fixed cylinder. The air nozzle is aligned with the welding torch.

[0011] Preferably, the air nozzle is adapted to be able to eject radially, so as to change the distance from the welding point.

[0012] Preferably, a driving rod is hermetically and slidably connected in the fixed cylinder, and a return spring is connected to the driving rod. The return spring is used to push the driving rod away from the fixed cylinder. A driving cylinder that can be ejected radially is provided on the side wall of the end of the fixed cylinder. The air nozzle is provided on the driving cylinder. A transmission mechanism is adapted between the driving rod and the driving cylinder. The transmission mechanism is adapted to be able to drive the driving cylinder to eject as the driving rod is pressed down.

[0013] Preferably, two driving cylinders are provided along the circumferential direction. A blocking plate is also provided on the frame. One of the two driving cylinders is aligned with the welding torch, and the other of the two driving cylinders is aligned with the blocking plate. The transmission mechanism is also adapted to be able to drive the two driving cylinders to eject to different degrees, so that there is a gap between the driving cylinder corresponding to the welding torch and the inner wall of the main body, while the driving cylinder corresponding to the blocking plate abuts against the inner wall of the main body. The blocking plate is adapted to fit against the outer wall of the main body, and a detection member for detecting whether air flow is introduced is also provided on the fitting surface of the blocking plate.

[0014] Preferably, the transmission mechanism includes a driving inclined surface provided on the side wall of the driving rod. 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, an installation groove is formed on the fitting surface of the blocking plate. The detection member includes an air flow sensor or a pressure sensor provided in the installation groove.

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

[0017] 1. By the transfer of the transfer rack, the lower cover is pressed tightly against the main body. Subsequently, 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 torch and the welding seam. Compared with the prior art, on the one hand, the clamping of the lower cover and the main body in the present invention is more convenient. On the other hand, the stability of the welding path is improved by the active rotation of the rotating table, ensuring the welding quality.

[0018] 2. A fixed cylinder extending into the main body is provided on the rotating table, and an air nozzle is also provided on the inner wall of the fixed cylinder. Cooling gas is pumped into the fixed cylinder through a gas pumping mechanism, and then the air nozzle can spray the gas towards the welding point to dissipate heat from the inner wall of the main body.

[0019] 3. Online detection of the weld seam can be achieved through the abutment of the fixed cylinder against the inner wall of the main body and the cooperation with an external sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 It is a schematic cross-sectional structural diagram of the sealing plate;

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

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

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

[0026] As Figures 1 to 4 shown, a welding device for the main housing of an air conditioner compressor includes a frame 1. For example, an installation frame is provided on the frame 1, an ejecting member 7 is provided on the installation frame, a mounting seat 8 is provided on the ejecting shaft of the ejecting member 7, and a transfer rack 3 is rotatably connected to the bottom end of the mounting seat 8. In addition, a rotating table 2 is rotatably provided on the tabletop of the frame 1.

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

[0028] In some embodiments, both the first fixing member 4 and the second fixing member 6 may preferably be electromagnets, and the convenient clamping and releasing of the workpiece can be achieved by controlling the energization and de-energization of the electromagnets. The ejector 7 may preferably be a cylinder, and of course, other ejection schemes such as electric cylinders and hydraulic cylinders are not excluded as the choice of the ejector 7.

[0029] Generally speaking, cooling and heat dissipation of the workpiece are carried out synchronously with welding, which will help the workpiece achieve a better welding effect. For example, the workpiece is not easily deformed, and it helps to reduce the residual stress and cracks generated during the welding process of the workpiece. In the prior art, there is a heat dissipation scheme that uses an air-cooling mechanism to blow and cool on the outside of the housing, but this scheme cannot cool the inner wall of the main body 22. When the main body 22 is clamped and fixed to the rotating table 2, there is a relatively closed cavity inside it, which will cause overheating of the inner side of the main body 22.

[0030] To solve 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 upward through the rotating table 2 and does not have a rigid connection with the rotating table 2. And a nozzle 10 is provided on the side wall of the end of the fixed cylinder 9, and the nozzle 10 is aligned with the position of the welding torch 5. In addition, a gas pumping mechanism is connected to the inner cavity of the fixed cylinder 9.

[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 type of gas can be selected according to the welding process. Subsequently, the cooling gas will flow and be ejected from the nozzle 10 to achieve heat dissipation on the inner side of the welding seam. The gas pumping mechanism can adopt a common air pump device, which will not be elaborated in this disclosure.

[0032] In some embodiments, the nozzle 10 may preferably be adapted to be ejected radially, which will help to change the distance between the nozzle 10 and the welding point. On the one hand, the nozzle 10 and the welding point can maintain a relatively close distance so that the air flow can have a maximum heat dissipation effect on the welding seam; on the other hand, when the nozzle 10 is retracted into the side of the fixed cylinder 9, it will facilitate the clamping of the main body 22 to the rotating table 2, that is, it is not easy for the nozzle 10 to interfere with the installation action of the main body 22 sleeved outside the fixed cylinder 9.

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

[0034] In this example, a driving rod 11 is fitted and slidably connected in the fixed cylinder 9 in a sealed manner, and a return spring (not shown in the figure) is further provided in the fixed cylinder 9. The return spring acts on the driving rod 11 with an elastic force to push it away from the fixed cylinder 9. Thus, when the transfer rack 3 ejects towards the rotary 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] On the side wall of the end of the fixed cylinder 9, a driving cylinder 12 is provided so as to be radially ejectable, and the above-mentioned 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 such that the downward pressure of the driving rod 11 drives the driving cylinder 12 to eject.

[0036] For example, a return spring may also be connected between the driving cylinder 12 and the fixed cylinder 9, and the transmission mechanism 13 may include a driving inclined surface 16 provided 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 eject.

[0037] As Figure 4 shown, as another solution, the connection between the driving cylinder 12 and the fixed cylinder 9 is achieved through a lead screw ejection structure 18. Specifically, a lead screw is rotatably provided at the opening of the side wall of the fixed cylinder 9, and the driving cylinder 12 is provided on the lead screw nut. As for other assembly relationships and structures of the lead screw ejection structure 18, they are prior art and will not be elaborated in the present 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 lead screw. By pressing down the rack 19, the gear 20 is driven to rotate, thereby driving the driving cylinder 12 to eject. Preferably, the lead screw may be a hollow structure, so as to facilitate the gas to pass through the lead screw and enter the driving cylinder 12.

[0038] Different from other welding operations, the housing of the compressor needs to maintain a sealing performance to prevent unexpected air leakage during operation. Thus, in the present disclosure, two driving cylinders 12 are adapted to be circumferentially provided, and a sealing plate 14 aligned with the welding seam of the workpiece is further provided on the frame 1. For the convenience of description, the two driving cylinders 12 are respectively defined as a first driving cylinder 12 and a second driving cylinder 12 below, wherein the first driving cylinder 12 is aligned with the welding torch 5, and the second driving cylinder 12 is aligned with the sealing plate 14.

[0039] The difference between the two driving cylinders 12 is that the air nozzle 10 on the first driving cylinder 12 needs to eject a smooth air flow for cooling the welding point. Therefore, there should be a gap between the end of the first driving cylinder 12 and the main body 22 for adaptation. The second driving cylinder 12 is adapted to fit against the inner wall of the main body 22. Under normal circumstances, the air flow in the second driving cylinder 12 cannot be ejected due to the blocking of the main body 22. The function of the second driving cylinder 12 will be elaborated in detail below.

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

[0041] In the example where the transmission mechanism 13 is the driving inclined plane 16, the two driving inclined planes 16 can be adapted to have different inclination angles. For example, the inclination angle of the driving inclined plane 16 corresponding to the first driving cylinder 12 can be adapted to be smaller than the inclination angle of the driving inclined plane 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 planes 16, the driving inclined plane 16 with a greater slope will push the corresponding driving cylinder 12 to eject a greater stroke.

[0042] In the example where the transmission mechanism 13 is the 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 well-known to those skilled in the art, so it will not be elaborated here. Similarly, when the driving rod 11 is pressed down, although the pressing distance of the driving rod 11 is constant, due to the different transmission ratios of the two sets of racks 19 and gears 20, the second driving cylinder 12 will have a greater ejection stroke than the first driving cylinder 12.

[0043] As Figure 2 、 Figure 3 shown, the sealing plate 14 is adapted to fit against the outer wall of the main body 22, and an installation groove 17 is also provided on the fitting surface of the sealing plate 14, and an air flow detection component 15 such as an air flow sensor or a pressure sensor is arranged in the installation groove 17. In a specific welding operation, as the rotating table 2 rotates, the weld will gradually approach the second driving cylinder 12 side. Under normal circumstances, when there is no welding defect, the second driving cylinder 12 cannot eject air flow due to the blocking of the inner wall of the main body 22; but when a welding defect occurs, the gas in the second driving cylinder 12 will eject from the welding defect and flow into the side of the sealing plate 14. At this time, the detection component 15 can detect the inflow of the air flow, so as to judge the occurrence of the welding defect.

[0044] For example, when a welding omission occurs, the rotation position of the rotary table 2 can be recorded, and after the initial welding operation is completed, the rotary table 2 can be controlled to rotate so that the welding omission point is opposite to the welding torch 5, realizing the repair welding of the welding omission point. The rotary table 2 can preferably be rotationally driven by a servo motor, facilitating the recording of the position of the welding omission point.

[0045] In a preferred example, the circumferential angle between the first driving cylinder 12 and the second driving cylinder 12 is 30 - 45 degrees, which enables a certain distance between the second driving cylinder 12 and the welding point, making it less likely to be damaged by overheating. At the same time, it can also achieve the maximum extent of on-line detection of the main body 22 weld seam during a single rotation of the rotary table 2. Attached Figure 1 In the figure, an example is shown where the first driving cylinder 12 and the second driving cylinder 12 are opposed, that is, the circumferential angle between the two is 90 degrees. Of course, after the initial welding operation is completed, the welding torch 5 can be controlled not to operate, and only the rotary table 2 can be controlled to rotate. At this time, the second driving cylinder 12 will conduct a complete inspection of the weld seam. It can be understood that this will also help the first driving cylinder 12 to quickly dissipate heat from the welded seam after the workpiece is welded.

[0046] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. An air-conditioning compressor main housing welding device, comprising a frame (1), characterized in that: A turntable (2) and a transfer rack (3) are oppositely arranged on the frame (1). A first fixing member (4) for clamping the lower cover is arranged on the transfer rack (3). The transfer rack (3) is adapted to be able to move towards the turntable (2) side, so that the lower cover presses the main body against the turntable (2). The turntable (2) is adapted to be able to rotate, so as to drive the main body and the lower cover to rotate synchronously. A welding gun (5) is also arranged on the frame (1). A fixing cylinder (9) is arranged at the center of the turntable (2). An air nozzle (10) is arranged on the side wall of the end of the fixing cylinder (9). The inner cavity of the fixing cylinder (9) is adapted to be engaged with a gas pumping mechanism. The air nozzle (10) is adapted to be able to eject radially, so as to change the distance from the welding point. A driving rod (11) is hermetically and slidably connected in the fixing cylinder (9), and a return spring is connected to the driving rod (11). The return spring is used to push the driving rod (11) away from the fixing cylinder (9). A driving cylinder (12) that can be ejected radially is arranged on the side wall of the end of the fixing cylinder (9). The air nozzle (10) is arranged on the driving cylinder (12). A transmission mechanism (13) is adapted between the driving rod (11) and the driving cylinder (12). The transmission mechanism (13) is adapted to be able to drive the driving cylinder (12) to eject as the driving rod (11) is pressed down. Two driving cylinders (12) are arranged along the circumferential direction. 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 be able to drive the two driving cylinders (12) to eject to different degrees, so that there is a gap 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 fit against the outer wall of the main body, and a detection member (15) for detecting whether air flow is introduced is also arranged on the fitting surface of the blocking plate (14).

2. The main housing welding device of an air-conditioning compressor according to claim 1, characterized in that: A second fixing member (6) for clamping the main body is arranged on the turntable (2).

3. The main housing welding device of an air-conditioning compressor according to claim 1, characterized in that: An ejecting member (7) is arranged on the frame (1). A mounting seat (8) is arranged on the ejecting shaft of the ejecting member (7). 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, characterized in that: Both the first fixing member (4) and the second fixing member (6) are electromagnets.

5. The main housing welding device of an air-conditioning compressor according to any one of claims 1-4, characterized in that: The gas pumping mechanism is adapted to be able to introduce cooling gas into the fixing cylinder (9). The air nozzle (10) is aligned with the welding gun (5).

6. The main housing welding device of an air-conditioning compressor according to claim 1, characterized in that: The transmission mechanism (13) includes a driving inclined surface (16) arranged on the side wall of the driving rod (11). A return spring is also connected between the driving cylinder (12) and the fixing cylinder (9) to drive the end of the driving cylinder (12) to abut against the driving inclined surface (16).

7. The air-conditioning compressor main housing welding device according to claim 1, characterized in that: An installation groove (17) is formed in the fitting surface of the plugging plate (14), and the detection member (15) includes an air flow sensor or a barometric pressure sensor disposed in the installation groove (17).

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