Intelligent welding system and process method for hydro-generator stator

Abstract

This invention discloses an intelligent welding system and process for a hydro-generator stator, belonging to the field of generator stator welding equipment and process technology. The invention includes a stator comprising a cylindrical stator base, positioning ribs, and support blocks. The stator base has multiple annular plates arranged at intervals from bottom to top. Multiple positioning ribs are evenly distributed circumferentially and welded to each annular plate via support blocks. An automatic welding system is mounted on the support arm of a rotating lifting device within the stator cavity. The rotating lifting device is located at the center of the stator, and an automatic measurement system is also installed on the support arm of the rotating lifting device. This invention improves welding quality, shortens the welding cycle, achieves automatic measurement, is highly efficient in measurement, provides accurate measurement data, timely feedback, rapid adjustment, and allows for data storage and retrieval throughout the entire process.

Description

Technical Field

[0001] This invention relates to an intelligent welding system and process for stator positioning rib support blocks of hydro-generators, belonging to the field of generator stator welding equipment and process technology. Background Technology

[0002] Welding of the positioning rib support blocks for the hydro generator stator is a crucial step in stator installation, and the quality of its data determines the overall installation quality of the stator. Traditionally, the positioning rib support blocks are welded manually. Due to the presence of two people welding symmetrically, differences in welding speed, welding skill, space constraints, and the presence of overhead welding among the welders can all affect the welding quality, resulting in rework that significantly impacts the construction period.

[0003] In addition to individual differences among welders, the frequent data measurements during the welding process and the data processing after welding often lack systematic overall analysis. In order to shorten the on-site installation period, reduce labor costs, and improve welding quality, it is necessary to provide an intelligent welding system and process method for the stator positioning rib support block of a hydro-generator. Summary of the Invention

[0004] This invention proposes an intelligent welding system and process for hydro-generator stators to shorten on-site installation time, reduce labor costs, and improve welding quality.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] An intelligent welding system for a hydro-generator stator includes a stator comprising a cylindrical stator base, positioning ribs, and support blocks. The stator base has multiple annular plates arranged at intervals from bottom to top. The positioning ribs are multiple and evenly distributed circumferentially, and are welded to each annular plate by the support blocks. An automatic welding system is mounted on the support arm of a rotating lifting device inside the stator cavity. The rotating lifting device is located at the center of the stator, and an automatic measuring system is also installed on the support arm of the rotating lifting device.

[0007] Preferably, the automatic welding system includes an intelligent robot (also known as a robotic arm), a torch cleaning and wire cutting device, a wire feeder, and a welding torch. The intelligent robot, the torch cleaning and wire cutting device, and the wire feeder are all installed at the end of the support arm, and the intelligent robot holds the welding torch.

[0008] Preferably, the rotary lifting device includes a pre-embedded foundation plate, a self-aligning seat, a central column, and a sliding frame center. The self-aligning seat is fixed on the pre-embedded foundation plate, and a central column is provided above it. A sliding frame center is provided on the central column. Support arms and balance arms are provided on both sides of the sliding frame center. A counterweight is provided on the balance arm. A sliding drive center is provided above the central column and is connected to the lifting accessories.

[0009] Preferably, the automatic measurement system includes a telescopic contact ball, a temperature measuring device, an information collector, and a main control platform. The telescopic contact ball and the temperature measuring device are installed at the end of the support arm. The information collector transmits the collected data to the main control platform, which is used for global control of the entire system.

[0010] Preferably, the telescopic contact ball consists of a radially movable telescopic rod and a positioning ball. The positioning ball is installed at the end of the telescopic rod, which can move back and forth along the support arm direction to adjust the position of the positioning ball.

[0011] A method for intelligent welding of a hydro-generator stator is based on the aforementioned intelligent welding system for a hydro-generator stator. The stator to be welded includes a cylindrical stator base, positioning ribs, and support blocks. The stator base has seven annular plates arranged at intervals from bottom to top. Multiple positioning ribs are evenly distributed circumferentially. Support blocks are located on each annular plate. The method includes the following steps:

[0012] S1. Data Detection: Set the +Y position as the support arm reference position. Lower the support arm to the ring plate position and rotate clockwise until the positioning ball touches the positioning rib. Slightly adjust the radial distance of the telescopic rod and rotate slowly. Measure Ra, Rb, and R0 of the first positioning rib. Ra, Rb, and R0 refer to the distance from the contact point between the positioning ball and the positioning rib to the center. The data at the initial contact with the positioning rib is Ra, and the data at the final departure from the positioning rib is Rb. The maximum value between Ra and Rb is R0. The system automatically records a series of data and identifies Ra, Rb, and R0 in the main control platform as required. Continue rotating the support arm to measure the second positioning rib, and so on, until all positioning ribs in the first ring are measured. Return the support arm to the +Y position, raise the support arm to the second ring, and repeat this operation until all positioning rib data measurements are completed. Record the maximum value R0 of the positioning rib center data. The angle between the +Y position and the positioning rib center is θ. The positioning rib center angles are respectively... , ... The minimum values ​​Ra and Rb at both ends of the positioning rib are calculated, and the difference is output as Ra-Rb; the data R0 and Ra-Rb are output respectively, and the chord distance L is calculated and output based on the difference in the center angle θ of the positioning rib. Repeat the above operation to measure the positioning rib data corresponding to all ring plates. According to the input inspection standard, when R0, Ra-Rb, and L all meet the requirements, the welding conditions are met.

[0013] S2. Welding Experiment: After the data detection is completed and recorded, the welding experiment is prepared. A comparative experiment method is adopted, setting up one experimental group and five control groups. The experimental group welds according to the required welding method and welding current and voltage. The five control groups change the welding method and welding current and voltage respectively. Each group changes only one parameter. By comparing the welding results, the actual impact on the welding effect is judged, which serves as the basis for adjusting the subsequent welding parameters.

[0014] The experimental group followed the requirements: the radial weld was symmetrically welded from left to right, the welding current was set to 175A, the welding voltage was set to 25V, and the welding direction was from 5-10mm from the inner diameter of the base ring outward to the edge of the support block. The weld was divided into four passes: the first pass was the joint between the support block and the ring plate, the second pass was the contact point between the first weld and the ring plate, the third pass was the contact point between the first weld and the support block, and the fourth pass was the cover weld.

[0015] Control group 1: Change the radial weld welding method from left-right symmetrical welding to welding the right side after completing one weld on the left side, while keeping the rest unchanged;

[0016] Control group 2: The welding current was changed to 150A, and the rest were the same as the experimental group;

[0017] Control group 3: The welding current was changed to 190A, and the rest were the same as the experimental group;

[0018] Control group 4: The welding voltage was changed to 22V, and the rest were the same as the experimental group;

[0019] Control group 5: The welding voltage was changed to 28V, and the rest were the same as the experimental group;

[0020] Data were recorded for each welding pass in both the experimental group and the five control groups. The trend of data change after welding of the support block was analyzed as conditions changed, which served as the basis for adjustments in subsequent welding processes.

[0021] S3. Block Welding: Due to the thin, long, and straight characteristics of the positioning ribs, to ensure that the positioning ribs do not change position due to the force applied during block welding, a three-point positioning method is required during welding. First, weld the middle rib; after confirming the data is normal, weld the top and bottom points of the positioning rib separately to confine the positioning rib within the specified data. Then, weld symmetrically from top to bottom to gradually complete the welding, minimizing the impact of the block on the positioning ribs' position. This is done in the order of four rings, two rings, six rings, three rings, five rings, one ring, and seven rings. After the data detection in S1 is completed, radial weld welding begins. After the previous data measurement is completed, the rotating lifting device adjusts the arm height to the fourth ring position, with the position determined by the telescopic contact ball. At this point, the telescopic contact ball contacts the positioning rib, and the intelligent robot adjusts the arm height angle. With the welding torch aligned with the contact position between the support block and the ring plate, the first radial weld is performed according to the welding method of the experimental group required in S2. After welding, the support arm is rotated to a specified angle. After the position of the telescopic contact ball is deemed qualified, the infrared thermometer above the support arm measures the temperature of the support block. If the temperature meets the welding requirements, the above welding steps are repeated. If the temperature does not meet the requirements, the arm is rotated to the position of the next positioning rib. The welding sequence for a total of 7 rings is ring 4, ring 2, ring 6, ring 3, ring 5, ring 1, and ring 7. After the first radial weld is completed, the first set of data (R0, Ra, Rb, L) is measured according to the method in S1. Based on the welding trend measured in the S2 experiment, the welding method for the second weld is adjusted for positions with large changes. The remaining welds are welded according to the method of the first weld. The remaining welds are then welded in sequence according to this method.

[0022] S4. Final data measurement: After the radial and circumferential welds are completed, the final data measurement is performed according to the measurement method in S1. Before the data measurement begins, the infrared temperature measuring device determines whether the data measurement conditions are met. After the temperature is met, the rotating lifting device moves the support arm from one ring to measure and output the R0, Ra, Rb, and L values ​​one by one as the final data to await acceptance.

[0023] S5. Welding data processing and feedback: The S1 measurement data, S2 experimental data, and S3 installation process data are transmitted from the information acquisition device to the main control platform for output. The data is analyzed and the patterns are summarized to provide data experience support for subsequent automatic welding and adjustment of the unit.

[0024] The beneficial effects of this invention are as follows: This invention innovatively realizes intelligent on-site welding of stator positioning rib support blocks for hydro-generators, which greatly improves the welding quality and work efficiency in this welding process. It also has the functions of high welding quality, reusability, and intelligent storage and query of welding process data. At the same time, the device of this invention is universal and can be used for intelligent on-site welding of stator positioning rib support blocks for all existing hydro-generators. Attached Figure Description

[0025] Figure 1 Main view of the intelligent welding system for the stator positioning rib support block of the hydro generator at the construction site;

[0026] Figure 2 This is the front view of the stator frame;

[0027] Figure 3 This is a front view of the stator positioning ribs and support blocks;

[0028] Figure 4 This is a front view of the automated welding system.

[0029] Figure 5 This is the front view of the rotating lifting device;

[0030] Figure 6 Schematic diagram of Ra and Rb;

[0031] Figure 7 A schematic diagram of R0;

[0032] Figure 8 A schematic diagram showing the center angle θ of the positioning reinforcement;

[0033] Figure 9 This is a schematic diagram of the weld.

[0034] Figure 10 This is a schematic diagram of a telescopic contact ball;

[0035] Figure 11 This is a schematic diagram illustrating the ring plate.

[0036] Figure 12 This is a schematic diagram of one type of rotating structure in a rotary lifting device;

[0037] Figure 13 This is a schematic diagram of one type of lifting structure in a rotary lifting device;

[0038] In the diagram, 100-stator; 101-stator base; 102-positioning rib; 103-support block; 104-support pier; 200-automatic welding system; 201-robot; 202-cleaning torch and wire cutting equipment; 203-wire feeder; 204-telescopic contact ball; 205-welding torch; 206-infrared temperature measuring device; 300-rotary lifting device; 301-embedded foundation plate; 302-self-aligning seat; 303-center column; 304-sliding frame center; 305-support arm; 306-balance arm; 307-counterweight block; 308-sliding drive center; 309-lifting accessories; 400-automatic measurement system; 401-information collector; 402-main control platform. Detailed Implementation

[0039] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0040] Specific Implementation Method 1. Combining Figures 1-13 This embodiment describes an intelligent welding system for positioning ribs and support blocks on-site of a hydro-generator stator. The system includes a stator 100, which is composed of a cylindrical stator base 101, positioning ribs 102, and support blocks 103. The positioning ribs are evenly distributed circumferentially, and the support blocks are located on each ring plate. The bottom of the stator is supported on the ground by supports 104. An automatic welding system 200 is mounted on the support arm of a stator rotation and lifting device 300 located within the stator cavity. The stator rotation and lifting device 300 is positioned at the center of the stator 100. An automatic measurement system 400 is also mounted on the support arm of the stator rotation and lifting device 300.

[0041] like Figure 4 As shown, the automatic welding system 200 consists of an intelligent robot 201, a torch cleaning and wire cutting device 202, a wire feeder 203, a telescopic contact ball 204, a welding torch 205, and an infrared temperature measuring device 206. The automatic welding system 200 is controlled by a main control platform 402. According to a set program, the intelligent robot 201 adjusts the welding torch 205 to a designated position. The infrared temperature measuring device 206 detects whether the position meets the welding temperature requirements. The torch cleaning and wire cutting device 202 and the wire feeder 203 are responsible for feeding the welding wire and maintaining the cleanliness and stability of the welding torch, respectively. The telescopic contact ball 204 is responsible for precise positioning to ensure the accuracy of the welding position. The telescopic contact ball 204 consists of a radially movable telescopic rod 2041 and a positioning ball 2042. The positioning ball 2042 contains a positioning chip. When the positioning ball 2042 contacts the ring plate or positioning rib 102, it feeds back the spatial coordinate position to the main control platform 402. The telescopic rod 2041 can be controlled to move back and forth along the support arm direction according to the set program, which is used to adjust the position of the positioning ball 2042.

[0042] like Figure 5As shown, the rotary lifting device 300 has a pre-embedded foundation plate 301 at the bottom, with a self-aligning seat 302 fixed on the pre-embedded foundation plate 301. A central column 303 is located above, and a sliding frame center 304 is mounted on the central column 303. Support arms 305 and balance arms 306 are located on both sides, with counterweights 307 mounted on the balance arms 306. A sliding drive center 308 is located above the central column 303 and is connected to the lifting accessory 309. The sliding drive center 308 is mainly a motor, controlled by the main control platform 402. It adjusts the height of the lifting accessory 309 according to the program settings. The lifting accessory 309 is connected to the sliding frame center 304, thereby ensuring that the entire support arm rises or falls to the specified height as required by the main control platform 402.

[0043] In this embodiment, the central column 303 of the rotary lifting device 300 is capable of rotational movement, one implementation of which is as follows: Figure 12 As shown, a first base 3031 is mounted on the bottom of the central column 303. The first lower base 3031 is mounted on a second base 3033 via a slewing bearing 3032. The slewing bearing 3032 is an internal gear type slewing bearing. Specifically, the outer ring of the slewing bearing 3032 is mounted on the second base 3033, and the inner ring of the slewing bearing 3032 is mounted on the first lower base 3031. A first motor 3034 is installed inside the second base 3033. A gear 3035 is mounted on the output shaft of the motor 3034. The gear 3035 meshes with the internal gear ring of the inner ring of the slewing bearing 3032. During operation, the first motor 3034 drives the gear 3035 to rotate. Under the meshing action of the gear 3035 and the internal gear ring of the inner ring of the slewing bearing 3032, the inner ring of the slewing bearing 3032 rotates. The inner ring of the slewing bearing 3032 drives the first lower base 3031 to rotate. At this time, the central column 303 also rotates accordingly. In addition, the second base 3033 is mounted on the self-aligning seat 302 (by adjusting the position of the second base 3033 on the self-aligning seat 302, the center position of the central column 303 within the stator 100 is adjusted).

[0044] In this embodiment, the sliding frame center 304 can perform linear lifting and lowering motion on the central column 303, one implementation of which is as follows: Figure 13As shown, the sliding drive center 308 includes a motor support 3081, a second motor 3082, and a first bevel gear 3083. The motor support 3081 is fixedly mounted on the upper end of the center column 303. The second motor 3082 is mounted on the motor support 3081, and the first bevel gear 3083 is mounted on the output shaft of the second motor 3082. The lifting accessory 309 includes a second bevel gear 3091, a lead screw 3092, a lead nut 3093, and a slide rail 3094. The lead screw 3092 is mounted on the motor support 3081 through a bearing seat, and the second bevel gear 3083 is mounted on the top of the lead screw 3092. 91. The second bevel gear 3091 meshes with the first bevel gear 3083. A lead screw 3093 is installed on the center 304 of the sliding frame. The lead screw 3092 is installed in cooperation with the lead screw 3093. A slide rail 3094 is installed on the side wall of the center column 303. A slider is embedded in the center 304 of the sliding frame. The slider is installed in cooperation with the slide rail 3094. During operation, the second motor 3082 drives the lead screw 3092 to rotate through the first bevel gear 3083 and the second bevel gear 3091. Under the action of the slide rail 3094, the center 304 of the sliding frame can realize linear lifting and lowering motion on the center column 303.

[0045] like Figure 1 and Figure 4 As shown, the automatic measurement system 400 consists of a telescopic contact ball 204, a temperature measuring device 206, an information collector 401, and a main control platform 402, wherein the telescopic contact ball 204 and the temperature measuring device 206 are located in the automatic welding system.

[0046] Specific Implementation Method Two. A process method for an intelligent welding system for a stator positioning rib support block of a hydro-generator, which is implemented using the aforementioned intelligent welding system for a stator positioning rib support block of a hydro-generator, includes the following steps:

[0047] S1. Data Detection: The +Y position is the reference position of the support arm 305. According to the theoretical data in the drawing, lower the support arm 305 to the first ring position and rotate it clockwise until the positioning ball 2042 touches the positioning rib 102. The telescopic rod 2041 is slightly adjusted in radial distance and slowly rotated. The Ra, Rb, and R0 of the first positioning rib 102 are measured respectively. The data when it first touches the positioning rib is Ra, and the data when it finally leaves the positioning rib is Rb. The maximum value between Ra and Rb is R0. The system automatically records a series of data and identifies Ra, Rb, and R0 into the main control platform 402 as required. Continue to rotate the support arm 305 and measure the second positioning rib 102, ..., until all positioning ribs 102 in the first ring are measured. The support arm 305 returns to the +Y position and rises to the second ring. Repeat this operation until all positioning rib data measurements are completed. Record the center data (maximum value) of the positioning rib R0. The angle between the +Y position and the center of the positioning rib is θ. The center angles of the positioning ribs are respectively... , ... The minimum values ​​of the two ends of the positioning rib, Ra and Rb, are calculated and the difference is output as (Ra-Rb); the data R0 and (Ra-Rb) are output respectively, and the chord distance L is calculated and output based on the difference in the center angle θ of the positioning rib. Repeat the above operation to measure the data of all positioning ribs in the 7 rings. According to the input inspection standard, when R0, Ra-Rb, and L all meet the requirements, the welding conditions are met.

[0048] S2. Welding Experiment: After data detection and recording are completed, a welding experiment is prepared. A comparative experiment method is adopted, setting up one experimental group and five control groups. The experimental group welds according to the required welding method and welding current and voltage. The five control groups change the welding method and welding current and voltage respectively, with each group changing only one parameter. The actual impact on the welding effect is judged by comparing the welding results, which serves as the basis for adjusting the subsequent welding parameters. The experimental group followed the requirements, performing symmetrical radial welds with a welding current of 175A and a welding voltage of 25V. The welding direction started from 5-10mm from the inner diameter of the base ring and proceeded outwards to the edge of the support block. The weld consisted of four passes: the first pass was at the joint between the support block and the ring plate; the second pass was at the contact point between the first weld and the ring plate; the third pass was at the contact point between the first weld and the support block; and the fourth pass was a cover weld to ensure the final weld leg met the drawing requirements. Control group one changed the radial weld welding method, altering the symmetrical welding to welding the left side first, then the right side, while keeping the rest unchanged. Control group two changed the welding current to 150A, with the rest remaining the same as the experimental group. Control group three changed the welding current to 190A, with the rest remaining the same as the experimental group. Control group four changed the welding voltage to 22V, with the rest remaining the same as the experimental group. Control group five changed the welding voltage to 28V, with the rest remaining the same as the experimental group. Data were recorded for each welding pass in both the experimental group and the five control groups. The trend of data changes after welding of the support block was analyzed as conditions changed, serving as a basis for adjustments in subsequent welding processes.

[0049] S3. Block welding: Due to the thin, long, and straight characteristics of the positioning rib 102, to ensure that the positioning rib 102 does not change position due to the welding force of the block 103 during the block welding process, a three-point positioning method must be adopted during welding. That is, first weld the middle one, and after confirming that the data is normal, weld the top and bottom points of the positioning rib 102 respectively to confine the positioning rib within the specified data. Then, complete the welding step by step in a symmetrical manner to minimize the impact of the block 103 on the position of the positioning rib 102. That is, adopt the sequence of four rings, two rings, six rings, three rings, five rings, one ring, and seven rings. After the data detection in S1 is completed, radial weld welding begins. After the data measurement in the previous step is completed, the rotating lifting device 300 will move the support arm 3 05. The height is adjusted to the fourth ring position, and the position is determined by the telescopic contact ball 204. At this time, the telescopic contact ball 204 contacts the positioning rib 102. The intelligent robot 201 adjusts the height and angle of its arm, aligns the welding torch 205 with the contact position between the support block 103 and the ring plate, and performs the first radial weld according to the welding method of the experimental group required in S2. After the welding is completed, the support arm 305 rotates to the specified angle. After the position of the telescopic contact ball 204 is qualified, the infrared temperature measuring device 206 above the support arm measures the temperature of the support block. If the temperature meets the welding requirements, the above welding steps are repeated. If the temperature does not meet the requirements, the rotation continues to the position of the next positioning rib 102. The welding sequence of the 7 rings is four rings, two rings, six rings, three rings, five rings, one ring, and seven rings. After the first radial weld is completed, the first set of data is measured according to the method of S1, and the measured R0, Ra, Rb, and L data are used. Based on the welding trend measured in the S2 experiment, the welding method of the second weld is adjusted for positions with large changes. The rest are welded according to the welding method of the first weld. The remaining welds are completed in sequence according to this method.

[0050] S4. Final data measurement: After the radial and circumferential welds are completed, the final data measurement is performed according to the measurement method in S1. Before the data measurement begins, the infrared temperature measuring device 206 determines whether the data measurement conditions are met. After the temperature is met, the rotary lifting device 300 moves the support arm 305 from one ring to measure and output the R0, Ra, Rb, and L values ​​one by one as the final data to await acceptance.

[0051] S5. Welding data processing and feedback: The S1 measurement data, S2 experimental data, and S3 installation process data are transmitted from the information acquisition unit 401 to the main control platform 402 for output. The data is analyzed and the patterns are summarized to provide data experience support for subsequent automatic welding and adjustment of the unit.

[0052] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A smart welding system for a hydro-generator stator, comprising a stator (100), the stator (100) comprising a cylindrical stator base (101), positioning ribs (102), and support blocks (103), wherein the stator base (101) is arranged with multiple annular plates (105) spaced apart from bottom to top, the number of positioning ribs (102) is multiple, the multiple positioning ribs (102) are evenly distributed in a circular manner and fixed to each annular plate (105) by the support blocks (103), the support blocks (103) being welded to the annular plates (105), characterized in that: An automatic welding system (200) is installed on the support arm (305) of the rotary lifting device (300) inside the stator (100). The rotary lifting device (300) is located at the center of the stator (100). An automatic measuring system (400) is also installed on the support arm (305) of the rotary lifting device (300).

2. The intelligent welding system for the stator of a hydro-generator according to claim 1, characterized in that: The automatic welding system (200) includes an intelligent robot (201), a torch cleaning and wire cutting device (202), a wire feeder (203), and a welding torch (205). The intelligent robot (201), the torch cleaning and wire cutting device (202), and the wire feeder (203) are all installed at the end of the support arm (305). The intelligent robot (201) holds the welding torch (205).

3. The intelligent welding system for the stator of a hydro-generator according to claim 1, characterized in that: The rotary lifting device (300) includes a pre-embedded base plate 301, a self-aligning seat (302), a central column (303), and a sliding frame center (304). The self-aligning seat (302) is fixed on the pre-embedded base plate (301), and a central column (303) is provided above it. A sliding frame center (304) is provided on the central column (303). Support arms (305) and balance arms (306) are provided on both sides of the sliding frame center (304). A counterweight block (307) is provided on the balance arm (306). A sliding drive center (308) is provided above the central column (303). The sliding drive center (308) is connected to the lifting accessory (309).

4. The intelligent welding system for the stator of a hydro-generator according to claim 1, characterized in that: The automatic measurement system (400) includes a telescopic contact ball (204), a temperature measuring device (206), an information collector (401), and a main control platform (402). The telescopic contact ball (204) and the temperature measuring device (206) are installed at the end of the support arm (305). The information collector (401) transmits the collected data to the main control platform (402), which is used for global control of the entire system.

5. The intelligent welding system for the stator of a hydro-generator according to claim 4, characterized in that: The telescopic contact ball (204) consists of a radially movable telescopic rod (2041) and a positioning ball (2042). The positioning ball (2042) is installed at the end of the telescopic rod (2041). The telescopic rod (2041) can move back and forth along the support arm (305) to adjust the position of the positioning ball (2042).

6. A method for intelligent welding of a hydro-generator stator, implemented based on the intelligent welding system for a hydro-generator stator as described in any one of claims 1-5, wherein, The stator (100) to be welded includes a cylindrical stator base (101), positioning ribs (102), and support blocks (103). The stator base (101) has seven annular plates (105) arranged at intervals from bottom to top. There are multiple positioning ribs (102) evenly distributed around the circumference. The support blocks (103) are located on each layer of annular plates (105). The method is characterized by including the following steps: S1. Data detection: Set the +Y position as the reference position of the support arm (305), lower the support arm (305) to the ring plate 105, and rotate it clockwise until the positioning ball (2042) touches the positioning rib (102). The telescopic rod (2041) is slightly adjusted in radial distance and rotated slowly. The Ra, Rb, and R0 of the first positioning rib (102) are measured respectively. Ra, Rb, and R0 refer to the distance from the contact point between the positioning ball (2042) and the positioning rib (102) to the center. The data when the positioning ball (2042) first contacts the positioning rib is Ra, and the data when it finally leaves the positioning rib is Rb. The largest value between Ra and Rb is R0. The system automatically records a series of data and identifies Ra, Rb, and R0 into the main control platform (402) as required. It continues to rotate the support arm (305) and measure the second positioning rib (102), ... until all the positioning ribs (102) of the first ring are measured. The support arm (305) returns to the +Y position, and the support arm (305) is raised to the second ring. This operation is repeated until all positioning rib data is measured. The maximum value of the center data of positioning rib 102, R0, is recorded. The angle between the +Y position and the center of the positioning rib is θ. The center angles of the positioning ribs are respectively , ... The minimum values ​​Ra and Rb at both ends of the positioning rib are calculated, and the difference is output as Ra-Rb; the data R0 and Ra-Rb are output respectively, and the chord distance L is calculated and output based on the difference in the center angle θ of the positioning rib. Repeat the above operation to measure the positioning rib data corresponding to all ring plates. According to the input inspection standard, when R0, Ra-Rb, and L all meet the requirements, the welding conditions are met. S2. Welding Experiment: After the data detection is completed and recorded, the welding experiment is prepared. A comparative experiment method is adopted, setting up one experimental group and five control groups. The experimental group welds according to the required welding method and welding current and voltage. The five control groups change the welding method and welding current and voltage respectively. Each group changes only one parameter. By comparing the welding results, the actual impact on the welding effect is judged, which serves as the basis for adjusting the subsequent welding parameters. The experimental group followed the requirements: the radial weld was symmetrically welded from left to right, the welding current was set to 175A, the welding voltage was set to 25V, and the welding direction was from 5-10mm from the inner diameter of the base ring outward to the edge of the support block. The weld was divided into four passes: the first pass was the joint between the support block and the ring plate, the second pass was the contact point between the first weld and the ring plate, the third pass was the contact point between the first weld and the support block, and the fourth pass was the cover weld. Control group 1: Change the radial weld welding method from left-right symmetrical welding to welding the right side after completing one weld on the left side, while keeping the rest unchanged; Control group 2: The welding current was changed to 150A, and the rest were the same as the experimental group; Control group 3: The welding current was changed to 190A, and the rest were the same as the experimental group; Control group 4: The welding voltage was changed to 22V, and the rest were the same as the experimental group; Control group 5: The welding voltage was changed to 28V, and the rest were the same as the experimental group; Data were recorded for each welding pass in both the experimental group and the five control groups. The trend of data change after welding of the support block was analyzed as conditions changed, which served as the basis for adjustments in subsequent welding processes. S3. Block welding: Due to the thin, long, and straight characteristics of the positioning rib (102), in order to ensure that the positioning rib (102) will not change position due to the welding force of the block (103) during the block welding process, a three-point positioning method is required during the welding process. That is, first weld the middle, and after confirming that the data is normal, weld the top and bottom points of the positioning rib (102) respectively to limit the positioning rib within the specified data. Then, complete the welding step by step in a symmetrical manner to minimize the change in position of the positioning rib (102) due to the influence of the block (103). That is, adopt the sequence of four rings, two rings, six rings, three rings, five rings, one ring, and seven rings. After the data detection of S1 is completed, the radial weld welding begins. After the data measurement of the previous step is completed, the rotating lifting device (300) adjusts the height of the support arm (305) to the fourth ring position, and the position is determined by the telescopic contact ball (204). At this time, the telescopic contact ball (204) contacts the positioning rib (102), and the intelligent The robot (201) adjusts the height and angle of its arm, aligns the welding torch (205) with the contact position between the support block (103) and the ring plate, and performs the first radial weld according to the welding method of the experimental group required by S2. After the welding is completed, the support arm (305) rotates to a specified angle. After the position of the telescopic contact ball (204) is qualified, the infrared temperature measuring device (206) above the support arm measures the temperature of the support block. If the temperature meets the welding requirements, the above welding steps are repeated. If the temperature does not meet the requirements, the robot continues to rotate to the position of the next positioning rib (102). The welding sequence of the seven rings is four rings, two rings, six rings, three rings, five rings, one ring, and seven rings. After the first radial weld is completed, the first set of data is measured according to the method of S1. The measured R0, Ra, Rb, and L data are used. Based on the welding trend measured by the S2 experiment, the welding method of the second weld is adjusted for the positions with large changes. The rest are welded according to the welding method of the first weld. The remaining welds are welded in sequence according to this method. S4. Final data measurement: After the radial and circumferential welds are completed, the final data measurement is completed according to the measurement method of S1. Before the data measurement begins, the infrared temperature measuring device (206) determines whether the data measurement conditions are met. After the temperature is met, the rotating lifting device (300) moves the support arm (305) from one ring to measure and output the R0, Ra, Rb, and L values ​​as the final data to be accepted. S5. Welding data processing and feedback: The S1 measurement data, S2 experimental data, and S3 installation process data are transmitted from the information acquisition device (401) to the main control platform (402) for output. The data are analyzed and the patterns are summarized to provide data experience support for the subsequent automatic welding and adjustment of the unit.

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