High-frequency welding forming equipment for squirrel-cage rotor end ring

Abstract

The utility model relates to the field of rotor welding, in particular to squirrel-cage rotor end ring high-frequency welding forming equipment which comprises a rack, a liftable supporting plate is arranged in the rack, a rotating mechanism for driving the supporting plate to rotate is arranged in the rack, and a detection module for detecting the position of a rotor is arranged at the top end of the supporting plate. The top end of the rack is provided with a centering mechanism which is matched with the detection module to drive the rotor to move, and the centering mechanism is provided with an electromagnetic module for performing high-frequency heating on the rotor; the squirrel-cage rotor end ring high-frequency welding forming equipment can perform high-frequency heating on a rotor and weld a copper bar and an end ring, meanwhile, the whole welding process is full-automatic in operation, the welding process is simple and rapid, the production efficiency can be ensured, the rotor can be automatically centered, and the production efficiency is improved. And the heating uniformity, stability and quality of different positions of the rotor are ensured.

Description

Technical Field

[0001] The utility model relates to the field of rotor welding, in particular to a high-frequency welding forming device for the end ring of a squirrel-cage rotor. Background Art

[0002] The welding of the rotor end ring is to weld the rotor end ring and the copper bar together. This step is an important link in the motor manufacturing process and has an important impact on the performance and running stability of the motor.

[0003] The existing method is to operate on the rotor end ring and the copper bar by manual welding. However, there may be various defects such as poor weld formation, undercut, and weld bead in the manual welding process. These defects may affect the performance and running stability of the motor. At the same time, the manual welding operation is relatively cumbersome, the welding time is long, and the rotor production efficiency is low. Therefore, how to overcome the above existing technical problems and defects has become the key problem to be solved. Summary of the Utility Model

[0004] The invention purpose of the utility model is to overcome the defects described in the background art, so as to realize a high-frequency welding forming device for the end ring of a squirrel-cage rotor. The device can perform high-frequency heating on the rotor, weld the copper bar and the end ring, and at the same time, the whole welding process is fully automatic, the welding process is simple and fast, which can ensure the production efficiency, and can make the rotor automatically centered to ensure the heating uniformity, stability and quality of different positions of the rotor.

[0005] To achieve the above invention purpose, the technical solution of the utility model is: a high-frequency welding forming device for the end ring of a squirrel-cage rotor, including a frame. A liftable support plate is arranged inside the frame, and a rotating mechanism for driving the support plate to rotate is arranged inside the frame. To realize the full-automatic welding of the terminal and the copper bar. A detection module for detecting the position of the rotor is arranged at the top end of the support plate. A centering mechanism for driving the rotor to move in cooperation with the detection module is arranged at the top end of the frame. It can make the rotor located at the middle position during welding to ensure the stability and quality of welding. An electromagnetic module for performing high-frequency heating on the rotor is arranged on the centering mechanism to realize the high-frequency welding of the copper bar and the end ring of the rotor.

[0006] In the above high-frequency welding forming device for the end ring of a squirrel-cage rotor, the frame is a cylindrical structure with an open top. The support plate is in a circular plate-like structure. A fixed ring cooperating with the support plate is fixedly arranged at the top end of the frame.

[0007] In the above-mentioned high-frequency welding forming equipment for the squirrel-cage rotor end ring, the rotating mechanism includes a guide rod vertically and fixedly arranged at the middle position of the bottom of the support plate, and a spiral guide groove is formed on the guide rod. A control cylinder is vertically and fixedly arranged at the middle position inside the frame, the guide rod can be lifted and lowered in the control cylinder, and a first ball capable of sliding along the guide groove is rotatably arranged at the top end of the inner wall of the control cylinder. It can realize the rotation of the support plate.

[0008] In the above-mentioned high-frequency welding forming equipment for the squirrel-cage rotor end ring, a pull ring is coaxially and fixedly arranged at the bottom of the support plate. An electric push rod is vertically and fixedly arranged on the side of the control cylinder, the telescopic end of the electric push rod semi-wraps the pull ring, and the electric push rod is connected to the pull ring through a second ball rotatably arranged on its telescopic end. It realizes the lifting of the support plate, makes the support plate rotate during the lifting process, and ensures the uniformity between the rotor copper bars and the end cover. At the same time, the rotor cores can be welded together to improve the integrity and stability of the rotor.

[0009] In the above-mentioned high-frequency welding forming equipment for the squirrel-cage rotor end ring, the detection module includes a lifting cavity formed at the top end of the support plate, a pressing plate capable of protruding upward from the lifting cavity is arranged inside the lifting cavity, a touch switch capable of abutting against the pressing plate is fixedly arranged inside the lifting cavity, and a spring is arranged between the support plate and the pressing plate. It can detect the position of the rotor to facilitate subsequent operations.

[0010] In the above-mentioned high-frequency welding forming equipment for the squirrel-cage rotor end ring, the centering mechanism includes semi-circular positioning rods slidably arranged on both sides of the top end of the fixed ring. Guide rails are fixedly arranged on the fixed ring at the relative sides of the positioning rods, and the guide rails penetrate through the ends of the corresponding two positioning rods. A bidirectional lead screw is rotatably arranged on the fixed ring at the relative sides of the guide rails, the two ends of the bidirectional lead screw are respectively threadedly arranged with the ends of the corresponding two positioning rods, and a motor for driving the bidirectional lead screw to rotate is also fixedly arranged on the fixed ring. The ends of the two positioning rods can be inserted into each other. A plurality of third rollers are rotatably arranged on the side walls of the relative sides of the two positioning rods. It realizes the automatic centering setting of the rotor to ensure the quality of electromagnetic heating.

[0011] In the above-mentioned high-frequency welding forming equipment for the squirrel-cage rotor end ring, the electromagnetic module includes mounting plates respectively fixedly arranged on the two positioning rods, and a conductive coil facing the axis direction of the frame is arranged at the top end of the mounting plate. It realizes the electromagnetic heating of the rotor.

[0012] Compared with the prior art, the high-frequency welding forming equipment for the squirrel-cage rotor end ring of the present invention has at least the following beneficial effects:

[0013] The high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model includes a frame. Inside the frame, there is a liftable support plate. Inside the frame, there is a rotating mechanism for driving the support plate to rotate, which can automatically rotate and lift when the rotor is heated by high frequency, so as to ensure the uniformity of heating at each position of the rotor.

[0014] For the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model, a detection module for detecting the position of the rotor is arranged at the top end of the support plate, and a centering mechanism for driving the rotor to move in cooperation with the detection module is arranged at the top end of the frame, which can automatically center the rotor placed on the equipment to ensure that the distances from each position to the conductive coil are the same during heating, so as to ensure the stability and quality of heating.

[0015] For the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model, an electromagnetic module for performing high-frequency heating on the rotor is arranged on the centering mechanism, which can perform high-frequency heating on the rotor in a fully automatic manner, weld the copper bar and the end ring. The welding is simple and fast, which can ensure the production efficiency. At the same time, the rotor cores can be welded together to improve the integrity and stability of the rotor. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model;

[0017] Figure 2 is the internal structural schematic diagram of the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model;

[0018] Figure 3 is the schematic diagram of the position of the support plate of the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model;

[0019] Figure 4 is the structural schematic diagram of the detection module of the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model;

[0020] Figure 5 is the structural schematic diagram of the centering mechanism of the high-frequency welding forming equipment for the end ring of the squirrel-cage rotor of the present utility model.

[0021] In the figure: 1. Frame; 2. Support plate;

[0022] 3. Rotating mechanism; 31. Guide rod; 32. Guide groove; 33. Control cylinder; 34. First ball; 35. Pulling ring; 36. Electric push rod; 37. Second ball;

[0023] 4. Detection module; 41. Lifting cavity; 42. Pressing plate; 43. Tactile switch; 44. Spring;

[0024] 5. Centering mechanism; 51. Positioning rod; 52. Guide rail; 53. Bi-directional lead screw; 54. Motor; 55. Third roller

[0025] 6. Electromagnetic module; 61. Mounting plate; 62. Conductive coil

[0026] 7. Fixed ring Detailed implementation method

[0027] The high-frequency welding forming equipment for the squirrel-cage rotor end ring of the present utility model will be described in more detail below in conjunction with the accompanying drawings and through specific implementation methods

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model

[0029] See Figures 1 - 5 , the high-frequency welding forming equipment for the squirrel-cage rotor end ring of this embodiment can perform high-frequency heating on the rotor, weld the copper bar and the end ring, and at the same time, the entire welding process is fully automatic. The welding process is simple and fast, which can ensure the production efficiency. And it can make the rotor automatically centered to ensure the heating uniformity, stability and quality at different positions of the rotor. In this embodiment, it mainly includes a frame 1, and the frame 1 is a cylindrical structure with an open top. A liftable support plate 2 is arranged inside the frame 1, and the support plate 2 is in a circular plate shape. A rotating mechanism 3 for driving the support plate 2 to rotate is arranged inside the frame 1. The rotating mechanism 3 includes a guide rod 31 vertically and fixedly arranged at the middle position of the bottom of the support plate 2, and a spiral guide groove 32 is formed on the guide rod 31. A control cylinder 33 is vertically and fixedly arranged at the middle position inside the frame 1. The guide rod 31 can be lifted and lowered in the control cylinder 33, and a first ball 34 that can slide along the guide groove 32 is rotatably arranged at the top end of the inner wall of the control cylinder 33

[0030] A pull ring 35 is coaxially and fixedly arranged at the bottom of the support plate 2. An electric push rod 36 is vertically and fixedly arranged on the side of the control cylinder 33. The telescopic end of the electric push rod 36 semi-wraps the pull ring 35, and the electric push rod 36 is connected to the pull ring 35 through a second ball 37 rotatably arranged on its telescopic end. The friction is reduced through the second ball 37

[0031] When the rotor is placed on the support plate 2 for heating, the electric push rod 36 is controlled to work. At this time, the electric push rod 36 pulls the pull ring 35 downward through the second ball 37, thereby moving the support plate 2 downward. During this process, the guide rod 31 moves downward in the control cylinder 33 along with the support plate. At the same time, during the downward movement of the guide rod 31, the guide groove 32 is always on the first ball 34, thereby driving the guide rod 31 to rotate, so that the support plate 2 rotates during the downward movement, ensuring the uniformity of heating at each position of the rotor.

[0032] To achieve automatic centering of the rotor. Refer to Figure 4 , in this embodiment, a fixed ring 7 matching with the support plate 2 is fixedly arranged at the top end of the frame 1. A detection module 4 for detecting the position of the rotor is arranged at the top end of the support plate 2. The detection module 4 includes a lifting cavity 41 opened at the top end of the support plate 2. A pressing plate 42 that can extend upward out of the lifting cavity 41 is arranged inside the lifting cavity 41. A touch switch 43 that can be abutted against the pressing plate 42 is fixedly arranged inside the lifting cavity 41. A spring 44 is arranged between the support plate 2 and the pressing plate 42. It can detect the position of the rotor, facilitating subsequent operations. A step is arranged inside the lifting cavity 41. When the pressing plate 42 contacts the step, its top is flush with the top of the fixed ring 7.

[0033] A centering mechanism 5 for driving the rotor to move in cooperation with the detection module 4 is arranged at the top end of the frame 1. The centering mechanism 5 includes semi-circular positioning rods 51 slidably arranged on both sides of the top end of the fixed ring 7 respectively. Guide rails 52 are fixedly arranged on the fixed ring 7 at the opposite sides of the positioning rods 51. The guide rails 52 penetrate through the ends of the corresponding two positioning rods 51. A bidirectional lead screw 53 is rotatably arranged on the fixed ring 7 at the opposite sides of the guide rails 52. Both ends of the bidirectional lead screw 53 are threadedly arranged with the ends of the corresponding two positioning rods 51 respectively. A motor 54 for driving the bidirectional lead screw 53 to rotate is also fixedly arranged on the fixed ring 7. The ends of the two positioning rods 51 can be inserted into each other. A plurality of third rollers 55 are rotatably arranged on the side walls of the opposite sides of the two positioning rods 51. The friction between the positioning rods 51 and the rotor core is reduced through the third rollers 55, avoiding problems such as being unable to descend due to being squeezed by the positioning rods 51, so that the rotor core can descend stably. A pressure sensor is also arranged on the positioning rod 51 to detect the pressure of the positioning rod 51 and control the motor 54 to turn off.

[0034] Place the rotor core on the pressure plate 42. At this time, under the action of the gravity of the rotor core, the pressure plate 42 moves downward against the resistance of the spring 44 until the bottom of the pressure plate 42 abuts against the touch switch 43. At this time, control the operation of the motor 54 according to the signal fed back by the touch switch 43, so that the lead screw 53 rotates and is guided by the guide rail 52, thereby driving the two positioning rods 51 to move synchronously inward, and then squeezing the rotor core to the middle position to achieve automatic centering of the rotor. At this time, the silver-copper powder and the end cover can be placed on the top of the rotor to abut against the copper bar.

[0035] In order to realize electromagnetic heating of the rotor. In this embodiment, refer to Figures 1 - 5 , an electromagnetic module 6 for high-frequency heating of the rotor is provided on the centering mechanism 5. The electromagnetic module 6 includes mounting plates 61 fixedly provided on the two positioning rods 51 respectively, and a conductive coil 62 facing the axis direction of the frame 1 is provided at the top end of the mounting plate 61. The conductive coil 62 is a mature prior art and will not be elaborated here. When the positioning rod 51 moves, the guide coil moves synchronously with the mounting plate 61 along with the positioning rod 51, so as to ensure that the distances between different positions of the rotor and the conductive coil 62 are the same during heating, thereby ensuring the stability and quality of heating. Control the guide coil to perform electromagnetic heating on the rotor to realize welding of the copper bar and the end cover, ensure the efficiency and quality of welding, and improve the production efficiency of the rotor.

[0036] The usage method of the squirrel-cage rotor end-ring high-frequency welding forming equipment of the present utility model: First, place the rotor core on the pressure plate 42. At this time, under the action of the gravity of the rotor core, the pressure plate 42 moves downward against the resistance of the spring 44 until the bottom of the pressure plate 42 abuts against the touch switch 43. At this time, control the operation of the motor 54 according to the signal fed back by the touch switch 43, so that the lead screw 53 rotates and is guided by the guide rail 52, thereby driving the two positioning rods 51 to move synchronously inward, and then squeezing the rotor core to the middle position to achieve automatic centering of the rotor. During this process, detect the pressure of the positioning rod 51 through the pressure sensor and automatically control the motor 54 to turn off. At this time, the silver-copper powder and the end cover can be placed on the top of the rotor to abut against the copper bar. When the positioning rod 51 moves, the guide coil moves synchronously with the mounting plate 61 along with the positioning rod 51, so as to ensure that the distances between different positions of the rotor and the conductive coil 62 are the same during heating, thereby ensuring the stability and quality of heating. At this time, control the guide coil to perform electromagnetic heating on the rotor.

[0037] Control the electric push rod 36 to work. At this time, the electric push rod 36 pulls the pull ring 35 downward through the second ball 37, thereby moving the support plate 2 downward. During this process, the guide rod 31 moves downward in the control cylinder 33 along with the support plate. At the same time, during the downward movement of the guide rod 31, the guide groove 32 is always on the first ball 34, thereby driving the guide rod 31 to rotate, so that the support plate 2 rotates during the downward movement, ensuring the uniformity of heating at each position of the rotor. Thereby, the copper bar and the end cover are welded, ensuring the welding efficiency and quality, and improving the production efficiency of the rotor. At the same time, the rotor cores can be welded together to improve the integrity and stability of the rotor. Thereby, welding is carried out upward from the middle of the rotor core.

[0038] When the welding is completed, the rotor core can be removed, and each part returns to the initial state. Then, the rotor is turned over and placed on the pressing plate 42 for welding the other half of the rotor.

[0039] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meaning understood by those of ordinary skill in the field to which the present utility model belongs. As used in the specification and claims of this application, words such as "a" or "an" do not necessarily indicate a limitation in quantity. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0040] In the foregoing, the exemplary embodiments of the present utility model have been described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present utility model, various modifications and variations can be made to the above specific embodiments, and various combinations can be made to the technical features and structures proposed by the present utility model, without exceeding the protection scope of the present utility model.

Claims

1. A high-frequency welding forming device for the end ring of a squirrel-cage rotor, characterized in that: It includes a frame (1), inside which there is a liftable support plate (2). Inside the frame (1), there is a rotating mechanism (3) for driving the support plate (2) to rotate. At the top of the support plate (2), there is a detection module (4) for detecting the position of the rotor. At the top of the frame (1), there is a centering mechanism (5) that cooperates with the detection module (4) to drive the rotor to move. An electromagnetic module (6) for high-frequency heating of the rotor is provided on the centering mechanism (5).

2. The squirrel-cage rotor end-ring high-frequency welding and forming equipment according to claim 1, characterized in that: The frame (1) is a cylindrical structure with an open top. The support plate (2) is in the shape of a circular plate. At the top of the frame (1), there is a fixed ring (7) that cooperates with the support plate (2).

3. The squirrel-cage rotor end-ring high-frequency welding and forming equipment according to claim 1, characterized in that: The rotating mechanism (3) includes a guide rod (31) vertically and fixedly arranged at the middle position of the bottom of the support plate (2). A spiral guide groove (32) is formed on the guide rod (31). At the middle position inside the frame (1), there is a control cylinder (33) vertically and fixedly arranged. The guide rod (31) can move up and down inside the control cylinder (33). At the top inner wall of the control cylinder (33), there is a first ball (34) that can slide along the guide groove (32).

4. The squirrel-cage rotor end-ring high-frequency welding and forming equipment according to claim 3, characterized in that: At the bottom of the support plate (2), a pull ring (35) is coaxially and fixedly arranged. At the side of the control cylinder (33), an electric push rod (36) is vertically and fixedly arranged. The telescopic end of the electric push rod (36) semi-wraps the pull ring (35). The electric push rod (36) is connected to the pull ring (35) through a second ball (37) rotatably arranged on its telescopic end.

5. The squirrel-cage rotor end-ring high-frequency welding and forming equipment according to claim 1, characterized in that: The detection module (4) includes a lifting cavity (41) formed at the top of the support plate (2). Inside the lifting cavity (41), there is a pressing plate (42) that can extend upward out of the lifting cavity (41). Inside the lifting cavity (41), there is a touch switch (43) fixedly arranged and capable of abutting against the pressing plate (42). A spring (44) is arranged between the support plate (2) and the pressing plate (42).

6. The high-frequency welding forming equipment for the end ring of the squirrel-cage rotor according to claim 2, characterized in that: The centering mechanism (5) includes semi-circular positioning rods (51) that are respectively slidably arranged on both sides of the top of the fixed ring (7). On the fixed ring (7) at the relative side of the positioning rods (51), there are guide rails (52) fixedly arranged. The guide rails (52) penetrate the ends of the corresponding two positioning rods (51). On the fixed ring (7) at the relative side of the guide rails (52), a bidirectional lead screw (53) is rotatably arranged. The two ends of the bidirectional lead screw (53) are respectively threadedly arranged with the ends of the corresponding two positioning rods (51). On the fixed ring (7), there is also a motor (54) for driving the bidirectional lead screw (53) to rotate. The ends of the two positioning rods (51) can be inserted into each other. On the side walls of the relative sides of the two positioning rods (51), there are multiple third rollers (55) rotatably arranged.

7. The squirrel-cage rotor end-ring high-frequency welding and forming equipment according to claim 6, wherein: The electromagnetic module (6) includes mounting plates (61) respectively fixedly arranged on the two positioning rods (51). At the top of the mounting plate (61), there is a conductive coil (62) facing the axis direction of the frame (1).

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