Motor rotor spot welding device

Abstract

The utility model relates to a motor rotor spot welding device belongs to rotor processing equipment technical field, including bottom support, be provided with support plate on bottom support, be provided with lifting support on support plate, be equipped with the copper end ring welding mechanism of squirrel -cage rotor on lifting support, and be equipped with the mobile spot welding mechanism of cooperation copper end ring welding mechanism on lifting support, through the combination of spot welding gun and copper end ring welding mechanism, ensure that can carry out reinspection and carry out supplementary spot welding after copper end ring welding of squirrel -cage rotor.

Description

Technical Field

[0001] This application belongs to the technical field of rotor processing equipment, and specifically relates to a spot welding device for motor rotors. Background Technology

[0002] The squirrel-cage rotor copper end ring welding device is a core piece of equipment in modern high-efficiency motor manufacturing. It utilizes advanced induction heating technology or other high-energy heat sources, precise motion control, inert gas protection, and automated program control to achieve rapid, uniform, high-quality, and low-resistance fusion bonding between the rotor bars and the copper end ring. It uses a high-frequency induced magnetic field to induce eddy currents in the copper material, causing the welding area to rapidly heat up and melt or melt the solder, forming a metallurgical bond under a protective atmosphere.

[0003] After the connection points of both end rings are welded, the existing copper end ring welding device for squirrel-cage rotors cannot repair the rotor again, nor can it repair and weld the guide bars in the iron core slots. Publication CN120551538A provides a resistance spot welding gun for automatic welding of automotive parts. However, this spot welding gun is suitable for the automotive parts industry, where parts are often large and require numerous welding points. The high temperatures generated during welding cause thermal expansion and softening of the electrode material, and frequent contact and separation between the electrode and the workpiece generate mechanical friction, leading to gradual wear of the electrode surface material. Therefore, directly applying this spot welding gun to the welding of squirrel-cage rotors presents certain difficulties.

[0004] Furthermore, the welding head position of the original squirrel-cage rotor copper end ring welding device is fixed, making it difficult to match the welding requirements of rotor end rings of different diameters, requiring repeated adjustments to the tooling fixtures. Utility Model Content

[0005] The purpose of this invention is to address existing problems by providing a spot welding device for squirrel-cage rotors. This device combines a spot welding gun with a copper end ring welding mechanism, ensuring that the copper end rings of the squirrel-cage rotor can be re-inspected and supplemented with spot welding after welding.

[0006] To achieve the above technical objectives, the following technical solution is provided: a spot welding device for an electric motor rotor, including a bottom support, a support plate on the bottom support, a lifting support on the support plate, a copper end ring welding mechanism for a squirrel-cage rotor on the lifting support, and a movable spot welding mechanism that cooperates with the copper end ring welding mechanism on the lifting support.

[0007] The mobile spot welding mechanism includes a spot welding head, which is placed horizontally and parallel to the cross-section of the squirrel-cage rotor.

[0008] The guide rail component includes a guide rail support plate fixed on the lifting bracket. The guide rail support plate has several fixing holes. The guide rail is fixed to the guide rail support plate by fasteners in the fixing holes. The guide rail is provided with a movable fixing seat and a spot welding head for fixing.

[0009] The fixed base is equipped with a threaded shaft, and the bottom end of the threaded shaft is equipped with a bearing, which is embedded in the support plate; the upper end is equipped with a first motor fixed on the guide rail support plate, and the spot welding head can be moved up and down by controlling the first motor.

[0010] In one feasible embodiment, a transmission mechanism is provided inside the bottom support, and a claw-type fastening rotary table for fixing the squirrel-cage rotor is provided on the output end of the transmission mechanism and mounted on the support plate. The squirrel-cage rotor is fixed by engaging the rotor shaft of the squirrel-cage rotor through the claw-type fastening rotary table.

[0011] In one feasible embodiment, the spot welding head includes a welding head support plate fixed on a fixed base. The welding head support plate is provided with a first support block and a second support block. A rotating motor is fixed on the first support block, and a rotating bearing is provided inside the second support block. A support shaft for connecting the welding head is provided inside the rotating bearing. The support shaft is connected to the motor shaft of the rotating motor through a coupling. The rotation of the welding head is achieved by controlling the rotating motor.

[0012] In one feasible embodiment, a cover is provided on the support plate, a graphic detection mechanism is provided on the cover, and a control center is electrically connected to the graphic detection mechanism, the lifting bracket, the first motor, the transmission mechanism, and the rotating motor respectively; the control center is equipped with a touch screen human-machine interface.

[0013] In one feasible implementation, an air inlet is provided on the housing, located behind the touch screen human-machine interface, to introduce protective gas during welding.

[0014] In one feasible implementation, the spot welding head is connected to a solder addition system; the solder addition system is located outside the housing.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This technical solution utilizes a horizontally arranged spot welding head, along with adjustable guide rails and a threaded shaft, to achieve precise vertical displacement via a first motor, accommodating rotors of varying heights. A claw-type clamping rotary table, linked with a graphic detection mechanism, continuously calibrates the rotor position, ensuring precise alignment between the welding head and the guide bar end. The entire device integrates multiple functional modules, significantly improving welding efficiency. Attached Figure Description

[0017] 1. Bottom bracket, 2. Support plate, 3. Lifting bracket, 4. Copper end ring welding mechanism, 5. Moving spot welding mechanism, 6. Cover, 7. Air inlet.

[0018] 10. Squirrel-cage rotor; 11. Transmission mechanism; 12. Claw-type fastening rotary table.

[0019] 51. Spot welding head; 510. Welding head support plate; 511. First support block; 512. Second support block; 513. Rotating motor; 514. Welding head.

[0020] 52 Guide rail component, 520 Guide rail support plate, 521 Fixing hole, 522 Guide rail, 523 Fixing base, 524 Threaded shaft, 525 First motor

[0021] Figure 1 This is an overall external schematic diagram of this embodiment;

[0022] Figure 2 This is a schematic diagram of the internal structure of this embodiment;

[0023] Figure 3 This is a schematic diagram of the overall structure inside the casing in this embodiment;

[0024] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a structural schematic diagram of the guide rail component; Detailed Implementation

[0026] like Figure 1 , Figure 2 and Figure 3 The embodiment shown includes a spot welding device for an electric motor rotor, comprising a bottom support 1, a support plate 2 on the bottom support 1, a lifting support 3 on the support plate 2, a copper end ring welding mechanism 4 for a squirrel-cage rotor 10 on the lifting support 3, and a movable spot welding mechanism 5 that cooperates with the copper end ring welding mechanism 4 on the lifting support 3.

[0027] In this embodiment, a transmission mechanism 11 is provided inside the bottom bracket 1. A claw-type fastening rotary table 12 for fixing the squirrel-cage rotor 10 is provided on the output end of the transmission mechanism 11 and mounted on the support plate 2. The squirrel-cage rotor 10 is fixed by engaging the rotor shaft of the squirrel-cage rotor 10 through the claw-type fastening rotary table 12.

[0028] In this embodiment, a cover 6 is provided on the support plate 2, and a pattern detection mechanism is provided on the cover 6. A control center is electrically connected to the pattern detection mechanism, the lifting bracket 3, the first motor 525, the transmission mechanism 11, and the rotation motor 513. The control center is equipped with a touch screen human-machine interface. An air inlet 7 is provided on the cover 6, located behind the touch screen human-machine interface, to introduce protective gas during welding.

[0029] like Figure 4The movable spot welding mechanism 5 shown includes a spot welding head 51, which is horizontally positioned parallel to the cross-section of the squirrel-cage rotor 10. The spot welding head 51 includes a welding head support plate 510 fixed to a fixed base 523. The welding head support plate 510 has a first support block 511 and a second support block 512. A rotary motor 513 is fixed to the first support block 511, and a rotary bearing is installed inside the second support block 512. A support shaft connecting the welding head 514 is installed inside the rotary bearing, and the support shaft is connected to the motor shaft of the rotary motor 513 via a coupling. The rotation of the welding head 514 is achieved by controlling the rotary motor 513. Furthermore, the spot welding head 51 is connected to a solder addition system located outside the housing 6.

[0030] like Figure 5 The movable spot welding mechanism 5 shown also includes a guide rail component 52, which includes a guide rail support plate 520 fixed on the lifting bracket 3. The guide rail support plate 520 has several fixing holes 521. The guide rail 522 is fixed to the guide rail support plate 520 by fasteners in the fixing holes 521. The guide rail 522 is provided with a movable fixing seat 523 and fixed to the spot welding head 51. The fixing seat 523 is provided with a threaded shaft 524. The bottom end of the threaded shaft 524 is provided with a bearing, which is embedded in the support plate 2. The upper end is provided with a first motor 525 fixed on the guide rail support plate 520. The spot welding head 51 is moved up and down by controlling the first motor 525.

[0031] The claw-type clamping rotary table 12 precisely positions and holds the squirrel-cage rotor, ensuring rotor axis stability and enabling rotation. Water-cooling devices are installed on the lifting supports 3 near the upper and lower ends of the squirrel-cage rotor, providing forced circulating water cooling for the high-frequency induction coil, welding transformer, and even some clamps, preventing overheating damage. The entire housing 6 also protects operators from contact with high-temperature components, strong magnetic fields, or intense electric arc light.

[0032] The pattern inspection mechanism is used for precise positioning of the guide bar end before welding and for inspecting weld quality after welding. The control center drives the welding head movement mechanism according to a preset program, precisely positioning the induction coil above the junction of the guide bar and end ring to be welded. Before welding begins, inert shielding gas is introduced through inlet 7. The high-frequency induction power supply is activated, and a large current flows through the induction coil, generating a strong high-frequency alternating magnetic field around the coil. This high-frequency magnetic field penetrates the copper end ring and the end of the copper guide bar near the coil. During heating, solder is fed into or has already been placed in the weld gap. A metallurgical reaction occurs between the copper end ring and the guide bar, forming a strong metallurgical bond. Induction heating stops, and the heat is rapidly conducted to the surrounding cooler metal, allowing the welding area to cool naturally.

[0033] Then, the graphic inspection mechanism inspects the squirrel-cage rotor 10 again, and uses the moving spot welding mechanism 5 to supplement the welding of any areas with welding defects. The position of the defective area is adjusted and positioned by the cooperation of the claw-type fastening rotary table 12, the guide rail 52, and the rotatable welding head 514. The welding process ends when all the connection points between the guide bars and the end rings are welded. The protective gas is stopped. The clamps are released. The operator or the automatic unloading mechanism removes the welded squirrel-cage rotor.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0036] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A spot welding device for an electric motor rotor, comprising a bottom support (1), wherein a support plate (2) is disposed on the bottom support (1), characterized in that, The support plate (2) is provided with a lifting bracket (3), the lifting bracket (3) is provided with a copper end ring welding mechanism (4) for a squirrel cage rotor (10), and the lifting bracket (3) is also provided with a moving spot welding mechanism (5) that cooperates with the copper end ring welding mechanism (4). The mobile spot welding mechanism (5) includes a spot welding head (51), which is placed horizontally and parallel to the cross section of the squirrel-cage rotor (10). The guide rail component (52) includes a guide rail support plate (520) fixed on the lifting bracket (3). The guide rail support plate (520) has a plurality of fixing holes (521). The guide rail (522) is fixed on the guide rail support plate (520) by fasteners in the fixing holes (521). The guide rail (522) is provided with a movable fixing seat (523) fixed to the spot welding head (51). The fixed base (523) is provided with a threaded shaft (524), and the bottom end of the threaded shaft (524) is provided with a bearing, which is embedded in the support plate (2); the upper end is provided with a first motor (525) fixed on the guide rail support plate (520), and the spot welding head (51) can be moved up and down by controlling the first motor (525).

2. The motor rotor spot welding device according to claim 1, characterized in that, The bottom bracket (1) is provided with a transmission mechanism (11). The output end of the transmission mechanism (11) is provided with a claw-type fastening rotary table (12) for fixing the squirrel-cage rotor (10) mounted on the support plate (2). The squirrel-cage rotor (10) is fixed by engaging the rotor shaft of the squirrel-cage rotor (10) through the claw-type fastening rotary table (12).

3. The motor rotor spot welding device according to claim 2, characterized in that, The spot welding head (51) includes a welding head support plate (510) fixed on the fixed base (523). The welding head support plate (510) is provided with a first support block (511) and a second support block (512). A rotating motor (513) is fixed on the first support block (511). A rotating bearing is provided in the second support block (512). A support shaft for connecting the welding head (514) is provided in the rotating bearing. The support shaft is connected to the motor shaft of the rotating motor (513) through a coupling. The rotation of the welding head (514) is achieved by controlling the rotating motor (513).

4. The motor rotor spot welding device according to claim 3, characterized in that, The support plate (2) is provided with a cover (6), the cover (6) is provided with a graphic detection mechanism, and a control center is electrically connected to the graphic detection mechanism, the lifting bracket (3), the first motor (525), the transmission mechanism (11), and the rotating motor (513); the control center is equipped with a touch screen human-machine interface.

5. The motor rotor spot welding device according to claim 4, characterized in that, An air inlet (7) is provided on the cover (6). The air inlet (7) is located behind the touch screen human-machine interface and is used to introduce protective gas during welding.

6. The motor rotor spot welding device according to claim 4, characterized in that, The spot welding head (51) is connected to a solder adding system; the solder adding system is located outside the housing (6).

Images