High-precision rotor automatic welding machine

Abstract

A high-precision automatic welding machine for a rotor comprises a welding platform, a rotor lower positioning tool is arranged on the welding platform, a rotor upper positioning tool and a welding device are arranged above the rotor lower positioning tool, the rotor lower positioning tool comprises a rotating shaft lower positioning seat, a chuck clamping mechanism is arranged above the rotating shaft lower positioning seat, and the welding device is arranged above the rotating shaft lower positioning seat. A limiting groove is formed in the clamping end face of the chuck clamping mechanism. The rotor upper positioning tool comprises guide columns, the tops of the guide columns are connected through a fixing plate, a pressing driving assembly is arranged on the fixing plate, and the output end of the pressing driving assembly is connected with a rotating shaft upper positioning seat. The welding device comprises a lifting plate and a lifting driving device arranged on the fixing plate, and at least four spot welding assemblies are arranged on the lifting plate in the circumferential direction of the positioning base on the rotating shaft. The multiple welding devices are arranged at the shaft end of the rotor and the periphery of the damping ring, spot welding is carried out in a synchronous control mode, and the welding precision and quality are improved; and the clamping mechanism clamped with the rotor shell is adopted to position the rotor, so that the positioning precision and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, and particularly relates to a high-precision rotor automatic welding machine. Background Art

[0002] The shock-absorbing ring is usually used to reduce mechanical vibration and noise, and improve the stability and reliability of the system. In the application of the rotor core, the shock-absorbing ring can effectively connect the rotor shaft end and the assembly end, thereby improving the stability of the overall structure.

[0003] The traditional welding method is to perform positioning welding manually. Since the motor housing is not completely regular, it is difficult to position, and the welding precision is difficult to guarantee. At the same time, due to the large heat reaction zone during the welding process of the traditional welding method, it is easy to cause product deformation and material embrittlement.

[0004] Therefore, in view of the deficiencies of the existing technology, it is necessary to design a high-precision rotor automatic welding machine to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely explaining the technical solution of the present utility model and facilitating the understanding of those skilled in the art, and it cannot be considered that the above content is well-known to those skilled in the art just because these contents are described in the background art of the present utility model. Summary of the Utility Model

[0006] In order to overcome the above deficiencies in the prior art, the purpose of the present utility model is to disclose a high-precision rotor automatic welding machine for realizing high-precision welding of the rotor shaft end and the shock-absorbing ring.

[0007] The present utility model discloses a high-precision rotor automatic welding machine for automatically welding a shock-absorbing ring at the rotor shaft end, including a welding platform. A rotor lower positioning tooling is arranged on the welding platform, and a rotor upper positioning tooling and a welding device are arranged above the rotor lower positioning tooling, wherein:

[0008] The rotor lower positioning tooling includes a rotating shaft lower positioning seat. A chuck clamping mechanism is arranged above the rotating shaft lower positioning seat. A limiting groove for clamping and connecting with the rotor housing is arranged on the clamping end face of the chuck clamping mechanism. The rotor housing is fixed through the limiting groove, and its connection and positioning are accurate and not easy to loosen.

[0009] The rotor upper positioning tooling includes a plurality of guide posts fixed on the welding platform. The tops of the guide posts are connected through a fixing plate. A downward pressing driving component is arranged on the fixing plate, and the output end of the downward pressing driving component is connected with a rotating shaft upper positioning seat.

[0010] The welding device includes a lifting plate slidably connected to a guide post and a lifting drive device arranged on a fixed plate. There are at least four groups of spot welding assemblies circumferentially arranged on the lifting plate along the positioning seat on the rotating shaft. Electric welding is performed through the outer periphery to avoid deformation caused by local overheating.

[0011] Preferred technical solution: A displacement device is provided at the lower end of the lower positioning tooling for the rotor. The displacement device includes a slide rail and a horizontal drive arranged on the welding platform in the same direction. A slider is slidably connected to the slide rail, and the slider is connected to the output end of the horizontal drive. The top of the slider is connected to the bottom of the lower positioning tooling for the rotor. This enables the lower positioning tooling for the rotor to move horizontally, facilitating the picking and placing of the rotor.

[0012] Preferred technical solution: A positioning plate is provided on one side of the lower positioning seat of the rotating shaft. A positioning groove for clamping with the rotor housing is provided on the positioning plate, which is used for positioning during stator feeding.

[0013] Preferred technical solution: The lifting drive device includes a drive motor fixed on the fixed plate. The output end of the drive motor is connected to a lead screw. A lead screw nut is provided at the corresponding position on the lifting plate, and the lead screw is in transmission connection with the lead screw nut. The lifting of the welding device is controlled by the lead screw to make the positioning of the welding points more accurate.

[0014] Preferred technical solution: The spot welding assembly includes a horizontal movement mechanism installed on the lifting plate. The output end of the horizontal movement mechanism is connected to a welding torch, and the moving direction of the welding end of the welding torch intersects with the axis of the positioning seat on the rotating shaft.

[0015] Preferred technical solution: The chuck clamping mechanism is a pneumatic three-jaw chuck, and the welding torch is a tungsten inert gas welding torch.

[0016] Preferred technical solution: Guide sleeves are provided at the corresponding positions on the lifting plate and the positioning seat on the rotating shaft. The positioning seat on the rotating shaft and the downward pressure drive assembly are connected through a guide rod, and the outer periphery of the guide rod slides in the inner wall of the guide sleeve to improve the accuracy of the lifting movement.

[0017] Preferred technical solution: The guide rod is connected to the output end of the downward pressure drive assembly through an elastic member to avoid deformation caused by excessive clamping force at the shaft end of the rotor.

[0018] Preferred technical solution: Slide sleeves for guiding the shaft end of the rotor are provided on both the lower positioning seat and the upper positioning seat of the rotating shaft, which facilitates the positioning and clamping of the shaft end of the rotor.

[0019] Preferred technical solution: A sensor assembly is also provided on the welding platform. Proximity sensors for positioning the upper positioning tooling for the rotor and the welding device are provided on the sensor assembly to achieve automatic positioning welding.

[0020] Due to the application of the above technical solutions, the beneficial effects of the high-precision rotor automatic welding machine of the present utility model are as follows:

[0021] (1) A plurality of welding devices are arranged at the end of the rotor shaft and the outer periphery of the shock-absorbing ring, and spot welding is carried out in a synchronous control manner to improve the welding accuracy and quality;

[0022] (2) A clamping mechanism that is clamped with the rotor housing is used to position the rotor to improve the positioning accuracy and stability. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an automatic welding machine for a high-precision rotor of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of the positioning tooling and welding device on the rotor in the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the lower positioning tooling of the rotor in the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the lower positioning seat of the rotating shaft in the present utility model;

[0027] Figure 5 It is a schematic structural diagram of the positioning plate in the present utility model;

[0028] Figure 6 It is a schematic structural diagram of the jaw of the chuck clamping mechanism in the present utility model.

[0029] In the above drawings, 100, welding platform; 1, lower positioning tooling of the rotor; 11, lower positioning seat of the rotating shaft; 12, chuck clamping mechanism; 12a, limit groove; 13, displacement device; 13a, slide rail; 13b, horizontal drive; 13c, slider; 14, positioning plate; 14a, positioning groove; 2, upper positioning tooling of the rotor; 21, guide post; 22, fixing plate; 23, downward pressing drive assembly; 23a, guide rod; 23b, elastic member; 24, upper positioning seat of the rotating shaft; 3, welding device; 31, lifting plate; 32, lifting drive device; 32a, drive motor; 32b, lead screw; 32c, lead screw nut; 33, spot welding assembly; 33a, horizontal moving mechanism; 33b, welding torch; 4, sensor assembly. Detailed Embodiments

[0030] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Embodiment:

[0034] As Figure 1 shown, a high-precision rotor automatic welding machine disclosed by the present utility model includes a welding platform 100. A rotor lower positioning tooling 1 is provided on the welding platform 100, and a rotor upper positioning tooling 2 and a welding device 3 are provided above the rotor lower positioning tooling 1. The main components of the above-mentioned present utility model will be specifically described below:

[0035] As Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown in the figure, the lower rotor positioning tooling 1 includes a lower positioning seat 11 for the rotating shaft. The upper end surface of the lower positioning seat 11 for the rotating shaft is provided with a chuck clamping mechanism 12. The chuck clamping mechanism 12 is a pneumatic three-jaw chuck. The clamping end surface of the chuck clamping mechanism 12 is provided with a limit groove 12a for clamping with the rotor housing. A displacement device 13 is provided at the lower end of the lower rotor positioning tooling 1. The displacement device 13 includes a slide rail 13a and a horizontal drive 13b arranged on the welding platform 100 in the same direction. A slider 13c is slidably connected to the slide rail 13a. The slider 13c is connected to the output end of the horizontal drive 13b. The top of the slider 13c is connected to the bottom of the lower rotor positioning tooling 1. A positioning plate 14 is provided on one side of the lower positioning seat 11 for the rotating shaft. The positioning plate 14 is provided with a positioning groove 14a for clamping with the rotor housing. The lower positioning seat 11 for the rotating shaft is provided with a sliding sleeve for guiding the rotor shaft end.

[0036] As Figure 1 and Figure 2 shown in the figure, the upper rotor positioning tooling 2 includes a plurality of guide posts 21 fixed on the welding platform. The tops of the guide posts 21 are connected by a fixing plate 22. The fixing plate 22 is provided with a downward pressing drive assembly 23. The output end of the downward pressing drive assembly 23 is connected to an upper positioning seat 24 for the rotating shaft. The upper positioning seat 24 for the rotating shaft is provided with a sliding sleeve for guiding the rotor shaft end.

[0037] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown in the figure, the welding device 3 includes a lifting plate 31 slidably connected to the guide posts 21 and a lifting drive device 32 arranged on the fixing plate 22. At a position corresponding to the upper positioning seat 24 for the rotating shaft on the lifting plate 31, a guiding sleeve is provided. The upper positioning seat 24 for the rotating shaft and the downward pressing drive assembly 23 are connected by a guiding rod 23a. The outer periphery of the guiding rod 23a is slidably connected to the inner wall of the guiding sleeve. The guiding rod 23a and the output end of the downward pressing drive assembly 23 are connected by an elastic member 23b. The lifting drive device 32 includes a drive motor 32a fixed on the fixing plate 22. The output end of the drive motor 32a is connected to a lead screw 32b. A lead screw nut 32c is provided at a corresponding position on the lifting plate 31. The lead screw 32b is in transmission connection with the lead screw nut 32c. Four groups of spot welding assemblies 33 are arranged on the lifting plate 31 along the circumferential direction of the upper positioning seat 24 for the rotating shaft. The spot welding assembly 33 includes a horizontal moving mechanism 33a installed on the lifting plate 31. The output end of the horizontal moving mechanism 33a is connected to a welding torch 33b. The moving direction of the welding end of the welding torch 33b intersects with the axis of the upper positioning seat 24 for the rotating shaft. The welding torch 33b is a TIG welding torch.

[0038] As Figure 1 shown in the figure, a sensor assembly 4 is further provided on the welding platform 100. The sensor assembly 4 is provided with proximity sensors for positioning the upper rotor positioning tooling 2 and the welding device 3.

[0039] Refer toFigure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in , , the principle and usage method of a high-precision rotor automatic welding machine of the present utility model are described as follows: After pressing the rotor to be welded and the shock-absorbing ring together, they are placed into the lower rotor positioning tooling 1. During this process, the shaft end of the rotor is guided by the sliding sleeve at the lower positioning seat 11 of the rotating shaft. The positioning groove 14a on the positioning plate 14 is clamped and positioned with the rotor housing. The chuck clamping mechanism 12 closes to fix the rotor housing. The displacement device 13 drives the lower rotor positioning tooling 1 to move to the welding position. Subsequently, the upper rotor positioning tooling 2 descends and is connected to the upper shaft end of the rotor through the upper positioning seat 24 of the rotating shaft. The positioning of the stator is completed through the cooperation of the upper positioning seat 24 of the rotating shaft and the lower positioning seat 11 of the rotating shaft. During this process, the elastic member 23b buffers the connection to avoid extrusion deformation of the rotor rotating shaft during the clamping process. Finally, the lifting drive device 32 controls the lifting plate 31 and the spot welding assembly 33 to move to the welding position, and the horizontal movement mechanism 33a drives the welding torch 33b to stretch to complete the electric welding of the rotating shaft and the shock-absorbing ring.

[0040] The above embodiments are only illustrative of the principle and its effects of the present utility model, rather than limiting the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A high-precision rotor automatic welding machine, used for automatically welding a damping ring on a rotor shaft end, comprising a welding platform (100), a rotor lower positioning tool (1) being provided on the welding platform (100), a rotor upper positioning tool (2) and a welding device (3) being provided above the rotor lower positioning tool (1), characterized in that: The rotor lower positioning tool (1) comprises a rotating shaft lower positioning seat (11), a chuck clamping mechanism (12) is provided above the rotating shaft lower positioning seat (11), and a clamping end surface of the chuck clamping mechanism (12) is provided with a limiting groove (12a) that is clamped with the rotor housing; The rotor upper positioning tool (2) comprises a plurality of guide pillars (21) fixed on the welding platform, the tops of the guide pillars (21) are connected via a fixing plate (22), a downward pressing drive assembly (23) is provided on the fixing plate (22), and the output end of the downward pressing drive assembly (23) is connected to a rotation shaft upper positioning seat (24); The welding device (3) comprises a lifting plate (31) slidably connected to the guide column (21) and a lifting drive device (32) arranged on the fixed plate (22), and at least four groups of spot welding components (33) are arranged on the lifting plate (31) along the circumference of the positioning seat (24) on the rotating shaft.

2. A high-precision rotor automatic welding machine according to claim 1, characterized in that: A displacement device (13) is provided at the lower end of the rotor lower positioning tool (1), and the displacement device (13) comprises a slide rail (13a) and a horizontal drive (13b) arranged on the welding platform (100) along the same direction, a slider (13c) is slidably connected to the slide rail (13a), the slider (13c) is connected to the output end of the horizontal drive (13b), and the top of the slider (13c) is connected to the bottom of the rotor lower positioning tool (1).

3. A high-precision rotor automatic welding machine according to claim 1, characterized in that: A positioning plate (14) is provided on one side of the rotating shaft lower positioning seat (11), and a positioning groove (14a) is provided on the positioning plate (14) for clamping with the rotor housing.

4. A high-precision rotor automatic welding machine according to claim 1, characterized in that: The lifting drive device (32) comprises a driving motor (32a) fixed on the fixing plate (22), the output end of the driving motor (32a) is connected to a screw rod (32b), a screw rod nut (32c) is provided at a corresponding position of the lifting plate (31), and the screw rod (32b) is drivingly connected to the screw rod nut (32c).

5. A high-precision rotor automatic welding machine according to claim 1, characterized in that: The spot welding assembly (33) comprises a horizontal moving mechanism (33a) mounted on the lifting plate (31); the output end of the horizontal moving mechanism (33a) is connected to a welding gun (33b); the moving direction of the welding end of the welding gun (33b) intersects with the axis of the positioning seat (24) on the rotating shaft.

6. A high-precision rotor automatic welding machine according to claim 5, characterized in that: The chuck clamping mechanism (12) is a pneumatic three-jaw chuck, and the welding gun (33b) is an argon arc welding gun.

7. A high-precision rotor automatic welding machine according to claim 1, characterized in that: A guide sleeve is provided on the lifting plate (31) at a position corresponding to the upper positioning seat (24) on the rotating shaft. The upper positioning seat (24) on the rotating shaft is connected to the downward pressing drive assembly (23) via a guide rod (23a). The outer periphery of the guide rod (23a) is slidably connected to the inner wall of the guide sleeve.

8. A high-precision rotor automatic welding machine according to claim 7, characterized in that: The guide rod (23a) is connected to the output end of the downward pressing drive assembly (23) via an elastic member (23b).

9. A high-precision rotor automatic welding machine according to claim 1, characterized in that: The lower rotating shaft positioning seat (11) and the upper rotating shaft positioning seat (24) are both provided with a sliding sleeve for guiding the rotor shaft end.

10. A high-precision rotor automatic welding machine according to claim 1, characterized in that: The welding platform (100) is also provided with a sensor assembly (4), and the sensor assembly (4) is provided with a proximity sensor for positioning the positioning tool (2) and the welding device (3) on the rotor.

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