Stator BUSBAR welding station

Abstract

The utility model discloses a stator BUSBAR welding station which comprises a rack, a welding device, a welding electrode bar height detection unit, a stator welding tool, an automatic electricity taking unit, a visual guiding unit and a control system. The welding device comprises a welding gun head, and the bottom end of the welding gun head extends downwards to form a welding electrode bar; the welding electrode bar height detection unit is used for detecting the height of the bottom end of the welding electrode bar; the stator welding tool is used for positioning the end part of a flat copper wire of a stator and a stator busbar; the automatic electricity taking unit is used for being detachably connected with the stator welding tool to achieve electricity taking. The visual guiding unit is used for photographing towards the top of the stator product; therefore, automatic operation such as automatic entering of the stator product into the welding station, detection of the height of the welding electrode bar, automatic power taking and visual guidance automatic welding is achieved, the automation degree is high, and the welding quality can be improved easily.

Description

Technical Field

[0001] The utility model relates to the field technology of stator busbar welding, in particular to a stator BUSBAR welding station. Background Art

[0002] When welding the ends of the stator's flat copper wire to the stator busbar, the stator busbar (also known as a BUSBAR) must first be placed on top of the stator product, with the multiple welded portions of the stator busbar aligned with the ends of the stator's flat copper wire. Resistance welding (or arc welding) equipment typically includes a frame and a welding gun head mounted on the frame. The welding gun head is positioned downward, with a welding electrode (such as a tungsten rod or needle) extending downward from the bottom end of the welding gun head.

[0003] In the prior art, the welding equipment used to weld the ends of the stator flat copper wires to the stator busbars has some shortcomings:

[0004] 1. The degree of automation is not high enough, manual participation is high, labor costs are high, processing efficiency is low, and processing quality is inevitably affected by human errors.

[0005] 2. After multiple welding cycles, the bottom end of the welding electrode rod is prone to wear or contamination, resulting in a difference between the actual height of the welding electrode rod and the default height setting in the equipment system. During welding, the pressure of the welding electrode rod is prone to being too high or too low, resulting in defects such as cold welds, weak welds, surface cracks at the weld, spatter, overburning, burn-through, electrode sticking, and accelerated electrode consumption, which also have a negative impact on welding quality. In response to the above situation, in actual welding processing, the usual practice is to replace the welding electrode rod after a period of time or after completing the set welding workload to avoid a high welding defect rate. However, for the same welding electrode rod, in theory, except for the initial debugging and setting of the standard height, there is a possibility that the actual height of the welding electrode rod will differ from the default height setting in the equipment system during subsequent welding, which is not conducive to ensuring welding quality. Moreover, frequent replacement of welding electrode rods takes up the effective working time of the equipment, affects processing efficiency, and also increases the consumption cost of the welding electrode rod.

[0006] 3. The motor armature and BUSBAR flat copper wires applicable to the prior art are arranged circumferentially, and the bonding direction is circumferential, which cannot be applied to situations requiring radial bonding. In addition, although it achieves circumferential bonding, if the motor armature and the BUSBAR flat copper wires are misaligned in the radial direction (i.e., not aligned), it is difficult to solve the misalignment problem by simply inserting each pair of flat copper wires into a through hole. If each pair of flat copper wires is misaligned, it means that the bonding area is reduced and the stability of the welding joint is reduced.

[0007] 4. In the prior art, if the three outer ends of the BUSBAR are suspended and deformed, correction is required after welding the motor armature and the flat copper wire of the BUSBAR, which can easily have a negative impact on the weld and requires additional correction time, which inevitably increases production costs.

[0008] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0009] In view of this, the present invention aims to address the deficiencies in the existing technology, and its main purpose is to provide a stator BUSBAR welding station, which realizes automated operations such as automatic entry of stator products into the welding station, detection of welding electrode height, automatic power supply, and visually guided automatic welding. It has a high degree of automation and is conducive to improving welding quality.

[0010] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0011] A stator BUSBAR welding station, comprising:

[0012] The frame is provided with a guide rail group extending along the X-axis, and the guide rail group is provided with a stator loading fixture capable of conveying the stator along the X-axis of the guide rail group;

[0013] A welding device; the welding device includes a welding gun head, the welding gun head is arranged downward, and a welding electrode rod extends downward from the bottom end of the welding gun head; the welding gun head is connected to a Z-axis lifting drive unit, the Z-axis lifting drive unit drives the welding gun head to move up and down, and the Z-axis lifting drive unit is connected to a translation drive unit, the translation drive unit drives the Z-axis lifting drive unit and the welding gun head to translate together;

[0014] Welding electrode rod height detection unit; the welding electrode rod height detection unit is used to detect the bottom end height of the welding electrode rod;

[0015] Stator welding tool; the stator welding tool is used to position the end of the stator flat copper wire and the stator busbar;

[0016] Automatic power supply unit; the automatic power supply unit is used to detachably connect to the stator welding tooling to achieve power supply;

[0017] A visual guidance unit; the visual guidance unit is used to take a photo toward the top of the stator product;

[0018] Control system; the control system is connected to the Z-axis lifting drive unit, the translation drive unit, the welding electrode rod height detection unit, the automatic power supply unit and the visual guidance unit.

[0019] As a preferred solution, the translation drive unit includes an X-axis translation drive unit and a Y-axis translation drive unit. The X-axis translation drive unit drives the Z-axis lifting drive unit and the welding gun head to translate along the X-axis, and the Y-axis translation drive unit drives the Z-axis lifting drive unit and the welding gun head to translate along the Y-axis; the Y-axis translation drive unit is connected to the X-axis translation drive unit, and the Y-axis translation drive unit drives the X-axis translation drive unit, the Z-axis lifting drive unit and the welding gun head to translate along the Y-axis.

[0020] As a preferred solution, the welding electrode rod height detection unit includes a fiber optic sensor, which includes a fiber optic transmitter and a fiber optic receiver. The fiber optic transmitter and the fiber optic receiver are arranged opposite each other at a distance, and a detection port for the welding electrode rod to extend into is formed between the fiber optic transmitter and the fiber optic receiver.

[0021] As a preferred solution, the stator welding tool includes a terminal positioning assembly and an adjustment assembly; the terminal positioning assembly includes a positioning plate, a stator busbar carrier plate and a fixed pressure piece; the positioning plate is provided with a first positioning portion that is positioned with the stator product, the stator busbar carrier plate is connected to the positioning plate, a plurality of first connecting holes are provided on the stator busbar carrier plate, the fixed pressure piece is detachably pressed against the stator busbar carrier plate, and a plurality of first positioning pins are extended downward from the bottom of the fixed pressure piece to extend downward into the corresponding first connecting holes; the adjustment assembly includes a base and a plurality of clamping members arranged on the base, the base is provided with a second positioning portion that is positioned with the stator product and / or the positioning plate, and the clamping member includes a pushing portion and an action portion that drives the radial displacement of the pushing portion.

[0022] As a preferred solution, a magnet is provided on the fixed pressing plate, and the magnet attracts the stator busbar carrier plate, so that multiple outer ends of the stator busbar are pressed between the fixed pressing plate and the stator busbar carrier plate.

[0023] As a preferred solution, the base is provided with an avoidance groove for the end of the flat copper wire of the stator to be exposed upward, and the clamping parts are respectively arranged on the inner and outer sides of the avoidance groove, the pushing part of the inner clamping part is arranged to push radially outward, and the pushing part of the outer clamping part is arranged to push radially inward; the end of the pushing part has a clamping groove open in the pushing direction, the pushing part has a left clamping arm and a right clamping arm located on the left and right sides of the clamping groove, and the bottom end of the clamping groove has a pushing surface.

[0024] As a preferred solution, the rack is connected to a stand, the optical fiber sensor is installed on the top of the stand, the automatic power supply unit includes a power supply device arranged on the top of the stand, and the power supply device and the optical fiber sensor are staggered with each other along the X-axis.

[0025] As a preferred solution, the power-collecting device includes an automatically opening and closing power-collecting clamp, the power-collecting clamp is connected to a Y-axis translation cylinder, the Y-axis translation cylinder is installed on the top of the stand, and the Y-axis translation cylinder drives the power-collecting clamp to translate along the Y-axis relative to the stand.

[0026] As a preferred solution, the visual guidance unit is located on the side of the welding gun head, the shooting angle of the visual guidance unit is downward, and the visual guidance unit and the welding gun head are connected to the Z-axis lifting drive unit together, so that the Z-axis lifting drive unit drives the visual guidance unit and the welding gun head to rise and fall together.

[0027] As a preferred solution, the visual guidance unit also serves as a post-welding appearance inspection unit.

[0028] Compared with the existing technology, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly realizes automatic operations such as automatic entry of stator products into the welding station, detection of welding electrode height, automatic power supply, and visual guidance of automatic welding through the setting and coordination of welding devices, welding electrode rod height detection units, stator welding tooling, automatic power supply units, visual guidance units, and control systems. It has a high degree of automation and is conducive to improving welding quality.

[0029] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a perspective view of a stator BUSBAR welding station according to an embodiment of the present invention;

[0031] Figure 2 This is a partial perspective view of a stator BUSBAR welding station according to an embodiment of the present utility model;

[0032] Figure 3 yes Figure 2 Middle K-direction view;

[0033] Figure 4 This is a perspective view of the assembly of the welding electrode height detection unit and the power extraction clamp according to an embodiment of the present invention;

[0034] Figure 5This is an exploded view of the stator loading fixture, terminal positioning assembly, and adjustment assembly of an embodiment of the present invention;

[0035] Figure 6 This is a diagram illustrating the application status of the stator loading fixture, the terminal positioning assembly, and the adjustment assembly according to an embodiment of the present invention;

[0036] Figure 7 yes Figure 6 A partial enlarged view of point A in the middle;

[0037] Figure 8 This is an exploded view of a stator welding tool according to an embodiment of the present invention;

[0038] Figure 9 This is a perspective view of a terminal positioning assembly according to an embodiment of the present utility model;

[0039] Figure 10 It is a side view of the terminal positioning assembly of an embodiment of the present utility model;

[0040] Figure 11 This is an exploded view of a terminal positioning assembly according to an embodiment of the present utility model;

[0041] Figure 12 is a partial cross-sectional view of a terminal positioning assembly according to an embodiment of the present invention (showing multiple outer ends of a stator busbar);

[0042] Figure 13 It is an exploded view of the adjustment assembly of an embodiment of the present utility model.

[0043] Description of the accompanying symbols: frame H1, welding gun head H2, welding electrode rod H3, Z-axis lifting drive unit H4, X-axis translation drive unit H5, Y-axis translation drive unit H6, mounting frame H7, fiber optic transmitter H8, fiber optic receiver H9, detection port H10, first adjustment hole H11, fiber optic amplifier H12, stand H13, power taking device H14, power taking clamp H15, Y-axis translation cylinder H16, second adjustment hole H17, adapter plate H18, fiber optic sensor H19, third adjustment hole H20, terminal positioning assembly 100, positioning plate 101, stator bus carrier plate 102, fixed pressure piece 103, hook 104, elastic fastener 105, pad 106, first connecting hole 107, first positioning pin 108, Pin 1081, screw 1082, magnet 109, first positioning portion 1011, adjustment assembly 200, base 201, avoidance groove 2011, clamping member 202, second positioning portion 203, clamping groove 204, left clamping arm 2041, right clamping arm 2042, push surface 2043, limit block 205, guide block 206, limit hole 2051, guide hole 2061, clamped portion 207, screw 2021, sliding block 2022, push piece 2023, stator product 300, end portion 301 of flat copper wire, outer end 400 of stator busbar, through hole 401, welding portion 400' of stator busbar, stator loading jig 500, guide rail assembly 600, lifting unit 700, and visual guide unit 800. DETAILED DESCRIPTION

[0044] Please refer to Figures 1 to 13 As shown, it shows the specific structure of an embodiment of the present utility model.

[0045] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0046] A stator BUSBAR welding station, primarily used for welding stator products, such as welding the ends of stator flat copper wires to stator busbars, comprises a frame H1, a welding device, a welding electrode height detection unit, a stator welding fixture, an automatic power supply unit, a visual guidance unit 800, and a control system.

[0047] The frame H1 is provided with a guide rail group 600 extending along the X-axis, and the guide rail group 600 is provided with a stator loading fixture 500 capable of transporting along the X-axis of the guide rail group 600; the guide rail group 600 includes two guide rails spaced apart and arranged in parallel along the Y-axis, with a space reserved between the two guide rails, and a lifting unit 700, such as a lifting cylinder, is provided below the space; the guide rail group 600 passes through both ends of the frame along the X-axis, serving as an inlet and an outlet, so that the stator BUSBAR welding station can be easily connected with other stations and is suitable for automated production.

[0048] The welding device includes a welding gun head H2, which is arranged downward, and a welding electrode rod H3 extends downward from the bottom end of the welding gun head H2; the welding gun head H2 is connected to a Z-axis lifting drive unit, which drives the welding gun head H2 to move up and down, and the Z-axis lifting drive unit is connected to a translation drive unit, which drives the Z-axis lifting drive unit and the welding gun head H2 to translate together;

[0049] The welding electrode rod height detection unit is used to detect the bottom end height of the welding electrode rod H3;

[0050] The stator welding tool is used to position the ends of the stator flat copper wires and the stator busbars;

[0051] The automatic power supply unit is used to detachably connect to the stator welding tooling to achieve power supply; the automatic power supply unit includes a power supply device H14;

[0052] The visual guidance unit 800 is used to take pictures toward the top of the stator product;

[0053] The control system is connected to the Z-axis lifting drive unit, the translation drive unit, the welding electrode rod height detection unit, the automatic power supply unit and the visual guidance unit 800.

[0054] Specifically in this embodiment:

[0055] In the welding device, the translation drive unit drives the Z-axis lifting drive unit H4, the Z-axis lifting drive unit H4, and the welding gun head H2 to translate together. In this embodiment, the translation drive unit includes an X-axis translation drive unit H5 and a Y-axis translation drive unit H6. The X-axis translation drive unit H5 drives the Z-axis lifting drive unit H4, the Z-axis lifting drive unit H4, and the welding gun head H2 to translate together along the X-axis, and the Y-axis translation drive unit H6 drives the Z-axis lifting drive unit H4, the Z-axis lifting drive unit H4, and the welding gun head H2 to translate together along the Y-axis; the Y-axis translation drive unit H6 is connected to the X-axis translation drive unit H5, and the Y-axis translation drive unit H6 drives the X-axis translation drive unit H5, the Z-axis lifting drive unit H4, the Z-axis lifting drive unit H4, and the welding gun head H2 to translate together along the Y-axis. In actual design, the Z-axis lifting drive unit H4, the X-axis translation drive unit H5, and the Z-axis lifting drive unit H4 can all adopt cylinders or motors (such as motor linear modules).

[0056] The welding electrode rod height detection unit includes a fiber optic sensor H19, which comprises a mounting frame H7 and a fiber optic transmitter H8 and a fiber optic receiver H9, each mounted on the mounting frame H7. The fiber optic transmitter H8 and the fiber optic receiver H9 are positioned opposite each other with a detection port H10 formed between the fiber optic transmitter H8 and the fiber optic receiver H9, into which the welding electrode rod H3 of the welding gun head H2 extends downward. The fiber optic transmitter H8 and the fiber optic receiver H9 are each mounted on the mounting frame H7, and the position of the mounting frame H7 is adjustable. In this embodiment, the mounting frame H7 is provided with a vertically extending first adjustment hole H11 to adjust the vertical mounting height of the mounting frame H7, and thereby adjust the height of the fiber optic transmitter H8 and the fiber optic receiver H9. The fiber optic sensor is connected to a fiber optic amplifier H12, such as the FX-551-2 amplifier. The fiber optic amplifier H12 is connected to the control system. An RFID system may also be provided on the frame H1, and the RFID system is connected between the welding electrode height detection unit and the control system. For example, the optical fiber amplifier H12 is connected to the control system via the RFID system. The RFID system allows for instant information reading, which is convenient and fast, and is not affected by the working environment of the welding equipment, has a long service life, and is highly reliable.

[0057] Frame H1 is connected to a stand H13, with mounting bracket H7 mounted on top of stand H13. A power extraction device H14 is also mounted on top of stand H13, staggered along the X-axis with the fiber optic sensor to prevent interference. The power extraction device H14 includes an automatically opening and closing power extraction clamp H15 (its pair of jaws are driven by a pneumatic cylinder). The clamp H15 is connected to a Y-axis translation cylinder H16, mounted on top of stand H13. The cylinder H16 drives the clamp H15 to translate along the Y-axis relative to stand H13. The Y-axis translation cylinder H16 can be adjusted along the X-axis at the top of the stand H13. Specifically, a second adjustment hole H17 extending left and right can be provided on the top of the stand H13 to adjust the locking position of the Y-axis translation cylinder H16 within the second adjustment hole H17. An adapter plate H18 is connected to the top of the stand H13. The adapter plate H18 can be adjusted along the Y-axis relative to the top of the stand H13. The adapter plate H18 is provided with a third adjustment hole H20 extending forward and backward. The second adjustment hole H17 is provided on the adapter plate H18. The power supply device H14 is mounted on the adapter plate H18.

[0058] Before welding begins, the height of the welding electrode rod H3 is detected and fed back to the control system, which then recalculates the target height of the welding electrode rod H3. This is used to guide the Z-axis lift drive unit H4 in driving the welding gun head H2 to lower the welding electrode rod H3 to the target height during subsequent welding, ensuring welding quality. This indicates that before welding begins, the target height is recalculated by the welding electrode rod height detection unit based on the actual position of the welding electrode rod H3. This prevents negative impacts on welding quality caused by height differences due to wear at the bottom of the welding electrode rod H3 or other factors.

[0059] The stator welding fixture is used to weld the ends of the stator's flat copper wire to the stator busbar. It includes a terminal positioning assembly 100 and an adjustment assembly 200. The terminal positioning assembly 100, also referred to as the terminal fixture, is mounted on the stator product 300 to secure the subsequently installed stator busbar (also referred to as the BUSBAR terminal). The adjustment assembly 200 is used to adjust and correct the stator busbar and the ends of the stator's flat copper wire, preventing misalignment and ensuring a tighter fit for easier welding, thereby improving welding quality and yield.

[0060] The terminal positioning assembly 100 includes a positioning plate 101, a stator busbar carrier plate 102 and a fixed pressure plate 103; the positioning plate 101 is provided with a first positioning portion that is positioned with the stator product. The first positioning portion can be integrally connected to the positioning plate 101, or it can be an additional assembled accessory as the first positioning portion 1011, for example: a pin structure (defined as a second positioning pin, which can adopt the same structure as the first positioning pin) is installed on the positioning plate 101.The positioning plate 101 is roughly in the shape of an arc, such as a superior arc. The stator busbar carrier plate 102 is connected to the positioning plate 101. One end of the stator busbar carrier plate 102 can be hinged to one end of the arc of the positioning plate 101. The stator busbar carrier plate 102 can rotate relative to the hinge (rotate around the Z axis). The other end of the stator busbar carrier plate 102 is provided with a hook portion 104. Correspondingly, an elastic fastener 105 is provided at the other end of the arc of the positioning plate 101, and the elastic fastener 105 is used to lock the hook portion 104; the bottom of the positioning plate 101 and the stator busbar carrier plate 102 are respectively connected to a plurality of pads 106, which are convenient for connecting with multiple supports of the tray. The top of the support column forms an abutment positioning, and the pad 106 is detachably provided, and its material and shape can be flexibly set; a plurality of first connection holes 107 are provided on the stator bus carrier 102, and the plurality of first connection holes 107 are arranged side by side at intervals, which are arranged corresponding to the outer ends 400 of the stator bus. Usually, multiple outer ends of the stator bus are reserved with through holes 401, and the bottom of the fixed pressing plate 103 is downwardly extended with a plurality of first positioning pins 108, which are used to extend downward into the corresponding through holes and the first connection holes 107 to achieve positioning of multiple outer ends (for example, three) of the stator bus. The first positioning pins 108 can be integrally connected to the fixed pressing plate 103, or The first positioning pin 108 is an additional assembly accessory. In comparison, the additional assembly accessory makes the structure of the fixed pressing plate 103 easier to process, and the accessories are optional and replaceable, which is more flexible. In this embodiment, the first positioning pin 108 on the fixed pressing plate 103 is installed on the fixed pressing plate 103. The first positioning pin 108 includes a pin 1081 and a screw 1082. The lower end of the pin is designed to be in the shape of a bullet head for easy insertion. The upper end of the pin has a step on the outside, and the upper end of the pin has an internal threaded hole on the inside. A plurality of second connecting holes are provided on the fixed pressing plate 103, and the plurality of second connecting holes are arranged side by side and spaced apart from the plurality of first The connecting holes 107 are aligned one by one, the upper ends of the pins extend into the corresponding second connecting holes, the steps abut against the bottom surface of the fixed pressing plate 103, the screws are threadedly connected to the internal threaded holes of the pins from top to bottom, and the caps of the screws abut against the top surface of the fixed pressing plate 103, so that the first positioning pins 108 are fixedly mounted on the fixed pressing plate 103; and, a magnet 109 is provided on the fixed pressing plate 103 (for example, a magnet is provided at the bottom of the fixed pressing plate 103), and the stator busbar carrier plate 102 is attracted by the magnet 109, so that the multiple outer ends of the stator busbar are pressed between the fixed pressing plate 103 and the stator busbar carrier plate 102;.

[0061] The adjustment assembly 200 includes a base 201 and several clamping members 202 mounted on the base 201. The base 201 and the clamping members 202 are made of conductive materials. The base 201 has a clamping portion 207 for electrical connection. The base 201 can be a single component or assembled from multiple components. The base 201 is provided with a second positioning portion 203 for positioning with the stator product and / or the positioning plate 101. The second positioning portion 203 can be integrally connected to the base 201 or an additional assembly component serving as the first positioning portion, for example, a pin structure (defined as a third positioning pin, which can have the same structure as the first positioning pin 108) installed on the base 201. In this embodiment, the third positioning pin is inserted into a reserved hole in the positioning plate 101 to achieve positioning, effectively using the positioning plate 101 to position the base 201 relative to the stator product. The clamping member 202 includes a push portion and an actuating portion that drives the push portion to move radially forward and backward. The base 201 is provided with an avoidance groove 2011 for the ends of the flat copper wires of the stator to be exposed upward. The avoidance groove 2011 is roughly C-shaped to meet the exposure of multiple ends of the flat copper wires of multiple stators. The clamping members 202 are respectively arranged on the inner and outer sides of the avoidance groove 2011. The pushing portion of the inner clamping member 202 is radially pushed outward, while the pushing portion of the outer clamping member 202 is radially pushed inward. In this embodiment, the pushing portions of the inner and outer clamping members 202 of a part are arranged radially opposite to each other, and the pushing portions of the inner and outer clamping members 202 of another part are circumferentially staggered with each other. In this way, different pushing requirements of the ends of the flat copper wires of the stator and the welding portions of the stator bus are met. In actual use, some need to be pushed outward, some need to be pushed inward, and some need to be pushed both inward and outward at the same time to ensure that the positions of the ends of the flat copper wires of the stator and the welding portions of the stator bus can be corrected and fitted to facilitate subsequent welding.The end of the push portion has a clamping groove 204 that is open in the push direction, and the push portion has a left clamping arm 2041 and a right clamping arm 2042 located on the left and right sides of the clamping groove 204, and a push surface 2043 is provided at the bottom end of the groove depth of the clamping groove 204. Usually, the clamping groove 204 is set through the top and bottom, so that the clamping groove 204 is used to prevent misalignment correction and clamping; the inner sides of the left clamping arm 2041 and the right clamping arm 2042 are provided with a guide slope C1 and a shaping straight surface C2, and the guide slope is arranged along the groove depth of the clamping groove. It extends obliquely toward the middle of the groove, so that a gradually smaller guide correction port D1 is formed between the guide inclined surfaces C1 of the left clamping arm 2041 and the right clamping arm 2042, and the shaping straight surface is connected to the inner end of the guiding inclined surface, and a shaping port D2 is formed between the shaping straight surfaces C2 of the left clamping arm and the right clamping arm; for the case where the pushing portions of the inner and outer clamping members 202 are radially opposite to each other, the two clamping grooves 204 of the inner and outer clamping members 202 are staggered up and down; a limiting block 205 and a guide block 206 are provided on the base 201, and a limiting hole 2051 is provided in the limiting block 205, which radially passes through the two ends of the limiting block 205, and a guide hole 2061 is provided in the guide block 206, which radially passes through the two ends of the guide block 206, and the limiting hole 2051 block and the guide hole 2061 are radially opposite to each other. The clamping member 202 includes a screw 2021, a sliding block 2022 and a push piece 2023. The rod of the screw 2021 is provided with an external thread 1 and a limiting boss 2. The rod passes through the limiting hole 2051. The limiting block 205 is limited between the nut portion 3 of the screw 2021 and the limiting boss 2. The nut portion 3 is exposed to the outside of the limiting block 205. The external thread 1 is provided on the side of the limiting boss 2 away from the nut 3. The sliding block 2022 is provided with an internal thread 4 at one radial end. The push piece 2023 is generally Y-shaped. One radial end of the push piece 2023 is connected (e.g., detachably connected) to the other radial end of the sliding block 2022. More than one push piece 2023 can be connected to the same sliding block 2022. The external thread 1 of the rod and the internal thread 4 of the sliding block 2022 form a threaded connection, so that when the nut 3 (the nut has a hexagonal inner hole for inserting a tool for rotation) is rotated, because the screw rod 2021 cannot move radially, the external thread of the rod acts on the internal thread 4 of the sliding block 2022, causing the sliding block 2022 to move radially, and the push piece 2023 to move radially along with it. It can be seen that in this embodiment, the nut 3 of the screw rod 2021 serves as the active portion, and the push portion is provided at the other radial end of the push piece 2023.

[0062] Next, the use process of the stator welding tool of this embodiment is introduced:

[0063] The stator product is placed on a pallet (designated stator loading fixture 500) and transported along the production line (guide rail assembly 600). Once transported to the correct position, a lifting unit 700 (e.g., a lifting cylinder) lifts the pallet and the stator product into position.

[0064] In this state,

[0065] First, manually insert the terminal positioning assembly 100 (including the positioning plate 101, the stator busbar carrier plate 102, and the fixed pressure plate 103) into the top of the stator product. The positioning plate 101 and the stator product are positioned, and the stator busbar carrier plate 102 is located on the periphery of the area where the ends 301 of the flat copper wires of the stator product are located.

[0066] Then, the stator busbar is manually placed on the stator product so that the welding portion 400' of the stator busbar is aligned with the end portion 301 of the rectangular copper wire of the stator product 300. Furthermore, the outer ends of the stator busbar are positioned on the stator busbar carrier plate 102, and the through holes are aligned with the corresponding first connection holes 107.

[0067] Then, the fixing pressing plate 103 is assembled on top of the multiple outer ends of the stator busbar. The multiple first positioning pins 108 extend downward into the corresponding through holes 401 and the first connecting holes 107 to achieve the positioning of the multiple outer ends of the stator busbar. In addition, the magnets 109 on the fixing pressing plate 103 attract the stator busbar carrier plate 102, so that the multiple outer ends of the stator busbar are pressed between the fixing pressing plate 103 and the stator busbar carrier plate 102.

[0068] Then, the adjustment assembly 200 is manually placed on top of the stator product. The second positioning portion 203 of the base 201 is positioned in the reserved hole on the positioning plate 101. The plurality of clamping pieces 202 correspond to the welding portion of the stator busbar and the end of the stator's flat copper wire one by one.

[0069] Finally, the action part is manually adjusted to drive the push part to move radially, so as to adjust and correct the welding part of the stator busbar and the end of the stator flat copper wire, solve the circumferential misalignment problem, and make them close together in the radial direction;

[0070] This state facilitates subsequent welding, so that the welding quality of the stator busbar welding parts and the ends of the stator flat copper wires is better, and the multiple outer ends and the overall structure of the stator busbar are corrected and shaped, which is beneficial to improving the quality of the stator product.

[0071] The automatic power supply unit includes a power supply device mounted on the top of the stand, and the power supply device and the optical fiber sensor are staggered along the X-axis. The power supply device includes an automatically opening and closing power supply clamp, which is connected to a Y-axis translation cylinder mounted on the top of the stand. The Y-axis translation cylinder drives the power supply clamp to translate along the Y-axis relative to the stand.

[0072] The vision guidance unit 800 includes a CCD and is located to the side of the welding gun head. Its camera angle faces downward. Together with the welding gun head H2, the vision guidance unit 800 is connected to the Z-axis lift drive unit, allowing the Z-axis lift drive unit to lift the vision guidance unit 800 and the welding gun head H2 up and down together. Furthermore, the vision guidance unit 800 also serves as a post-weld visual inspection unit.

[0073] Next, the workflow of the stator BUSBAR welding station of this embodiment is introduced:

[0074] 1. The stator loading jig 500 slides into position along the guide rail assembly 600 (the position sensor can be used to monitor the position of the stator loading jig 500 in real time);

[0075] 2. Detect the height of the welding electrode rod H3 and feed the height value back to the control system; (The control system recalculates the target height of the welding electrode rod H3 to guide the Z-axis lifting drive unit H4 to drive the welding gun head H2 to lower the welding electrode rod H3 to the target height during subsequent welding.)

[0076] 3. The lifting cylinder lifts the stator loading jig upward, so that the stator loading jig 20 is separated from the guide rail assembly and is suspended and stationary, and will not slide along the X-axis of the guide rail assembly due to the action of the conveying drive;

[0077] 4. The Y-axis translation cylinder drives the power extraction clamp to translate, and the power extraction clamp H15 clamps the clamped portion 207 to achieve power extraction;

[0078] 5. The visual guidance unit 800 takes a photo to obtain the welding position and feeds it back to the control system;

[0079] 6. The control system guides the operation of the welding device according to the feedback information from the visual guidance unit 800, and the welding gun head H2 completes the welding of the ends of the stator flat copper wires and the stator busbars one by one;

[0080] 7. The visual guidance unit serves as an appearance inspection unit after welding, taking CCD photos of the top of the stator product to inspect the appearance of the stator product.

[0081] The design focus of the utility model is that it mainly realizes automatic operations such as automatic entry of stator products into the welding station, detection of welding electrode height, automatic power supply, and visual guidance of automatic welding through the setting and coordination of welding devices, welding electrode rod height detection units, stator welding tooling, automatic power supply units, visual guidance units, and control systems. The high degree of automation is conducive to improving welding quality.

[0082] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A stator BUSBAR welding station, characterized in that: Includes: The frame is provided with a guide rail group extending along the X-axis, and the guide rail group is provided with a stator loading fixture capable of conveying the stator along the X-axis of the guide rail group; A welding device; the welding device includes a welding gun head, the welding gun head is arranged downward, and a welding electrode rod extends downward from the bottom end of the welding gun head; the welding gun head is connected to a Z-axis lifting drive unit, the Z-axis lifting drive unit drives the welding gun head to move up and down, and the Z-axis lifting drive unit is connected to a translation drive unit, the translation drive unit drives the Z-axis lifting drive unit and the welding gun head to translate together; Welding electrode rod height detection unit; the welding electrode rod height detection unit is used to detect the bottom end height of the welding electrode rod; Stator welding tool; the stator welding tool is used to position the end of the stator flat copper wire and the stator busbar; Automatic power supply unit; the automatic power supply unit is used to detachably connect to the stator welding tooling to achieve power supply; Visual guidance unit; The visual guidance unit is used to take pictures toward the top of the stator product; control systems; The control system is connected to the Z-axis lifting drive unit, the translation drive unit, the welding electrode rod height detection unit, the automatic power supply unit and the visual guidance unit.

2. A stator BUSBAR welding station according to claim 1, characterized in that The translation drive unit includes an X-axis translation drive unit and a Y-axis translation drive unit. The X-axis translation drive unit drives the Z-axis lifting drive unit and the welding gun head to translate along the X-axis, and the Y-axis translation drive unit drives the Z-axis lifting drive unit and the welding gun head to translate along the Y-axis; the Y-axis translation drive unit is connected to the X-axis translation drive unit, and the Y-axis translation drive unit drives the X-axis translation drive unit, the Z-axis lifting drive unit and the welding gun head to translate along the Y-axis.

3. A stator BUSBAR welding station according to claim 1, characterized in that The welding electrode rod height detection unit includes a fiber optic sensor, which includes a fiber optic transmitter and a fiber optic receiver. The fiber optic transmitter and the fiber optic receiver are arranged opposite each other at a distance, and a detection port for the welding electrode rod to be inserted is formed between the fiber optic transmitter and the fiber optic receiver.

4. A stator BUSBAR welding station according to claim 1, characterized in that , the stator welding tool includes a terminal positioning assembly and an adjustment assembly; the terminal positioning assembly includes a positioning plate, a stator bus carrier plate and a fixed pressure piece; the positioning plate is provided with a first positioning portion that is positioned with the stator product, the stator bus carrier plate is connected to the positioning plate, the stator bus carrier plate is provided with a plurality of first connecting holes, the fixed pressure piece is detachably pressed against the stator bus carrier plate, and the bottom of the fixed pressure piece is downwardly extended to provide a plurality of first positioning pins to extend downward into the corresponding first connecting holes; the adjustment assembly includes a base and a plurality of clamping members arranged on the base, the base is provided with a second positioning portion that is positioned with the stator product and / or the positioning plate, the clamping member includes a pushing portion and an action portion that drives the radial displacement of the pushing portion.

5. A stator BUSBAR welding station according to claim 4, characterized in that A magnet is provided on the fixed pressing plate, and the magnet attracts the stator busbar carrier plate so that multiple outer ends of the stator busbar are pressed between the fixed pressing plate and the stator busbar carrier plate.

6. A stator BUSBAR welding station according to claim 4, characterized in that , the base is provided with an avoidance groove for the end of the flat copper wire of the stator to be exposed upward, and the clamping parts are respectively arranged on the inner and outer sides of the avoidance groove, the pushing part of the inner clamping part is set to push radially outward, and the pushing part of the outer clamping part is set to push radially inward; the end of the pushing part has a clamping groove open in the pushing direction, and the pushing part has a left clamping arm and a right clamping arm located on the left and right sides of the clamping groove, and the bottom end of the clamping groove has a pushing surface.

7. A stator BUSBAR welding station according to claim 3, characterized in that The rack is connected to a stand, the optical fiber sensor is installed on the top of the stand, the automatic power supply unit includes a power supply device arranged on the top of the stand, and the power supply device and the optical fiber sensor are staggered with each other along the X-axis.

8. A stator BUSBAR welding station according to claim 7, characterized in that The power-collecting device includes an automatically opening and closing power-collecting clamp, and the power-collecting clamp is connected to a Y-axis translation cylinder. The Y-axis translation cylinder is installed on the top of the stand, and the Y-axis translation cylinder drives the power-collecting clamp to translate along the Y-axis relative to the stand.

9. A stator BUSBAR welding station according to claim 1, characterized in that The visual guide unit is located on the side of the welding gun head, the shooting angle of the visual guide unit is downward, and the visual guide unit and the welding gun head are connected to the Z-axis lifting drive unit together, so that the Z-axis lifting drive unit drives the visual guide unit and the welding gun head to rise and fall together.

10. A stator BUSBAR welding station according to claim 9, characterized in that ,The visual guidance unit also serves as an appearance inspection unit after welding.

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