Welding machine for circular cover plate of pump

Abstract

The invention belongs to the technical field of pump circular end cover welding, and particularly discloses a pump circular cover plate welding machine which comprises a welding table, a laser welding head, a laser welding head and a laser welding head. The laser welding end corresponds to a to-be-welded strip on the circular cover plate, and the laser welding end is provided with a first projection point on the to-be-welded strip; the positioning table comprises a laser positioning end, and the laser positioning end is provided with a second projection point on the circular pump cover plate; the second projection point is located in front of the first projection point; the first driving end and the second driving end which are arranged in a split manner are sleeved and assembled with the circular cover plate through the middle hole; when the to-be-welded strip moves, the laser positioning end controls the laser welding end through positioning data obtained at the second projection point; the device has the following advantages that through laser positioning and accurate butt joint of the welding ends, it is ensured that the position of the to-be-welded strip is accurate, manual errors are avoided, the welding precision and efficiency are improved, manual intervention is reduced, stable and consistent welding quality is ensured, and the device is particularly suitable for mass production.

Description

Technical Field

[0001] This invention relates to the field of pump circular end cover welding technology, and more specifically, to a pump circular cover plate welding machine. Background Technology

[0002] In modern manufacturing, the welding of pump circular cover plates still typically relies on traditional manual operations, including manual rotary welding and visual inspection. While these methods are flexible in small-scale production, they are inefficient, difficult to control in quality, and pose safety risks in large-scale production environments. Specifically, manual rotary welding is not only inefficient but also prone to worker injury due to improper operation. Furthermore, weld quality is highly susceptible to the operator's skill and experience, making it difficult to guarantee product pass rates. Visual inspection, on the other hand, is highly subjective and prone to error, failing to achieve precise and consistent quality control.

[0003] To address this issue, a pump circular cover plate welding machine is proposed. Summary of the Invention

[0004] The present invention aims to provide a pump circular cover plate welding machine to solve or improve the problems mentioned above, such as the reliance on traditional manual operation for pump circular cover plate welding, which results in low efficiency, difficulty in quality control, and high safety risks.

[0005] In view of this, a first aspect of the present invention is to provide a pump circular cover plate welding machine.

[0006] A first aspect of the present invention provides a pump circular cover plate welding machine for welding circular cover plates having a central hole. The pump circular cover plate welding machine includes: a welding table having a laser welding end; the laser welding end corresponding to a strip to be welded on the circular cover plate, and the laser welding end having a first projection point on the strip to be welded; a positioning table, the welding table being movable relative to the positioning table along a preset direction; the positioning table having a laser positioning end corresponding to the pump circular cover plate along a direction perpendicular to the preset direction, and the laser positioning end having a second projection point on the pump circular cover plate; the second projection point being located in front of the first projection point along the extension direction of the strip to be welded; a first driving end and a second driving end separately disposed, which are fitted with the circular cover plate through the central hole; the first driving end and the second driving end cooperate to drive the strip to be welded to move along the extension direction and to make the first projection point gradually pass through the strip to be welded; during the movement of the strip to be welded, the laser positioning end controls the laser welding end by using positioning data obtained from the second projection point.

[0007] In any of the above technical solutions, a pre-inspection zone is formed in the area between the second projection point and the first projection point along the extension direction, and the length of the pre-inspection zone is set according to the welding radius and welding speed of the circular cover plate.

[0008] In any of the above technical solutions, the strip to be welded is an annular structure extending circumferentially along the circular cover plate, and has the following conditions: Condition 1, when the strip to be welded is located on the inner wall of the circular cover plate, the pre-inspection strip is located on the outer wall of the circular cover plate; Condition 2, when the strip to be welded is located on the outer wall of the circular cover plate, the pre-inspection strip is located on the surface of the strip to be welded.

[0009] In any of the above technical solutions, the first driving end is mounted on the positioning platform, and the first driving end includes a first rotating shaft that rotates the circular cover plate through the central hole; along the preset direction, the first rotating shaft is located between the laser welding end and the laser positioning end.

[0010] In any of the above technical solutions, the first driving end further includes a first adjusting seat for connecting the laser positioning end and the first rotating shaft; the first adjusting seat is used to drive the circular cover plate to move along the axial direction of the central hole through the first rotating shaft, so as to adjust the length of the pre-detection strip.

[0011] In any of the above technical solutions, the second driving end is connected to the welding station, and the second driving end includes a second rotating shaft for rotating the circular cover plate; the second rotating shaft and the first rotating shaft are respectively attached to the inner wall of the central hole, and the axis of the central hole is located between the second rotating shaft and the first rotating shaft.

[0012] In any of the above technical solutions, the second driving end further includes a second adjusting seat, which is connected to the laser welding end; the second adjusting seat is used to drive the laser welding end to move along a direction perpendicular to the preset direction to adjust the length of the pre-detection strip.

[0013] In any of the above technical solutions, when the strip to be welded is located on the inner wall of the circular cover plate: the second rotating shaft and the first rotating shaft together drive the circular cover plate to rotate, and the laser welding end is located inside the central hole; or the first rotating shaft drives the circular cover plate to rotate, and the laser welding end is located outside the central hole.

[0014] In any of the above technical solutions, the positioning data includes the distance value between the laser positioning end and the second projection point at each moment, and the laser welding end is controlled by the following rules: determining whether the absolute value of the difference between the distance value and the radius value of the strip to be welded at each moment is less than a first threshold; otherwise, the laser welding end is turned off; determining whether the absolute value of the difference between the distance values ​​at adjacent moments is greater than a second threshold; if so, the laser welding end is turned off.

[0015] In any of the above technical solutions, before the laser welding end is started, the second projection point passes through a path of at least one pre-detection band length on the surface of the circular cover plate.

[0016] The beneficial effects of this invention compared to the prior art are as follows:

[0017] Precise control of the position of the weld strip during the welding process ensures the accuracy of each welding point. The interaction between the laser positioning end and the laser welding end, especially through the precise alignment of the first and second projection points, ensures that each position of the weld strip is accurately positioned before laser welding, avoiding inaccurate welding positions caused by human error.

[0018] By coordinating the first and second drive ends, the circular cover plate can be smoothly driven to rotate, thereby driving the strip to be welded to be continuously welded along the extension direction, which improves the efficiency of welding operations. Especially in mass production, it can avoid the inefficiency and error problems that occur in manual operation.

[0019] The laser positioning end monitors the precise position of the strip to be welded in real time through feedback data, and ensures that every part of the welding process is in the correct position and state by controlling the start and stop of the laser welding end. This improves the accuracy of welding quality control, avoids the errors of traditional manual visual inspection, and ensures the stability and consistency of welding quality.

[0020] Additional aspects and advantages of embodiments of the invention will become apparent in the following description or may be learned by practice of embodiments of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the base plate and its connection structure of the present invention;

[0024] Figure 3This is a diagram showing the positional relationship between the first projection point and the second projection point in this invention.

[0025] Figure 4 This is a schematic diagram of the structure of the strip to be welded located on the inner wall of the circular cover plate according to the present invention.

[0026] in, Figures 1-4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0027] 1 Welding table, 101 Laser welding end, 102 First projection point, 103 Laser generator, 104 Welding electrode transmission wheel, 2 Positioning table, 201 Laser positioning end, 202 Second projection point, 203 Fixed seat, 3 First drive end, 301 First rotating shaft, 302 First lifting arm, 303 First single-axis drive arm, 304 First rotating wheel, 4 Second drive end, 401 Second rotating shaft, 402 Second lifting arm, 403 Third single-axis drive arm, 404 Second rotating wheel, 5 Pre-inspection belt, 6 Elastic sheet, 7 Base plate, 8 Controller, 9 Electrical control switch, 10 Second single-axis drive arm. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0030] Please see Figures 1-4 The following describes a pump circular cover welding machine according to some embodiments of the present invention.

[0031] An embodiment of the first aspect of the present invention provides a pump circular cover plate welding machine. In some embodiments of the present invention, such as... Figures 1-4 As shown, the pump circular cover plate welding machine includes: [details omitted for brevity]

[0032] The welding station 1 includes a laser welding end 101; the laser welding end 101 corresponds to the strip to be welded on the circular cover plate, and the laser welding end 101 has a first projection point 102 on the strip to be welded. The laser welding end 101 can perform welding by aligning the laser and welding rod with the first projection point 102 on the strip to be welded, and the continuous welding operation of the strip to be welded is realized by rotating the circular cover plate.

[0033] The positioning stage 2 and welding stage 1 are movable relative to the positioning stage 2 along a preset direction. The positioning stage 2 includes a laser positioning end 201, which corresponds to the pump circular cover plate along a direction perpendicular to the preset direction. The laser positioning end 201 has a second projection point 202 on the pump circular cover plate. The laser positioning end 201 can measure whether the weld strip on the circular cover plate is in the correct position by projecting a laser onto the second projection point 202 and receiving the reflected laser. If there are irregular shapes such as skew, depressions, or protrusions, they will be measured by the laser. Along the extension direction of the weld strip, the second projection point 202 is located in front of the first projection point 102, so that each position of the weld strip is welded after being positioned and measured by the laser positioning end 201.

[0034] The first drive end 3 and the second drive end 4 are separately configured and are fitted with a circular cover plate through a central hole. The use of the central hole to fix and rotate the cover plate facilitates continuous operation. The first drive end 3 and the second drive end 4 work together to rotate the circular cover plate. By using the first drive end 3 alone or by using the first drive end 3 and the second drive end 4 simultaneously to fit different central hole diameters on the circular cover plate, the weld strip is driven to move along the extension direction, and the first projection point 102 gradually passes over the weld strip to perform continuous welding tasks. During the movement of the weld strip, the laser positioning end 201 controls the laser welding end 101 through the positioning data obtained from the second projection point 202. If an incorrect weld strip surface shape or eccentric movement of the circular cover plate occurs, the laser welding end 101 will be shut down to facilitate subsequent remedial work.

[0035] This invention provides a pump circular cover plate welding machine. The welding table 1 is the core component of the entire welding process, providing a stable platform for the circular cover plate and ensuring its stability and precise positioning during welding. The welding table 1 is equipped with a laser welding end 101, used to precisely guide the welding process and avoid uneven welding due to positioning errors. The laser welding end 101 uses laser welding technology, which has high heat concentration and can achieve precise welding, especially suitable for applications requiring high-quality welds. The function of the laser welding end 101 is to precisely transfer heat energy to the area to be welded by aligning the laser and welding rod with the first projection point 102 on the strip to be welded, forming a stable weld. Laser welding technology can effectively improve welding accuracy and reduce human error. The strip to be welded refers to the area on the circular cover plate that needs to be welded, which is determined by design requirements. The laser welding end 101 ensures welding accuracy by aligning with the first projection point 102 on the strip to be welded. This design avoids the problems of inaccurate positioning and uneven weld seams in traditional manual rotary welding. The first projection point 102 is a precise point determined by the laser welding end 101 on the strip to be welded, serving as a reference position for starting welding. The laser welding end 101 performs precise welding based on this point, thereby ensuring the accuracy of the welding process. In this way, laser welding can maintain a consistent welding effect, avoiding errors caused by manual visual inspection during the welding process. Since the circular cover plate needs to be continuously welded to the strip to be welded, it needs to rotate during the welding process. The rotation of the circular cover plate ensures that the laser welding end 101 can perform uniform welding on the entire strip to be welded, without relying on manual rotation. This rotation mechanism improves welding efficiency and ensures the uniformity and consistency of weld quality.

[0036] The laser welding end 101, combined with the welding table 1, forms an automated welding system. The precise positioning and welding function of the laser welding end 101, in conjunction with the rotation of the circular cover plate, ensures a stable welding process without manual operation, thus improving welding efficiency and consistency. The laser welding end 101, by precisely aligning with the first projection point 102 on the weld strip, avoids positioning errors and uneven weld seams that may occur in manual welding. The application of laser welding technology makes welding quality more controllable, weld seams more uniform, and avoids subjective errors inherent in manual welding. Since the welding process is completed automatically by the machine, operators do not need to be directly exposed to high temperatures, arc light, or other hazardous factors, thus significantly reducing the risk of worker injury. Furthermore, the application of the automated system reduces the impact of prolonged high-temperature work on workers' health. The stability of the welding table 1 and the precision of the laser welding end 101 combine to make the welding process more efficient. Compared to traditional manual rotary welding, the welding machine can complete more welding tasks in a shorter time, improving production efficiency and reducing labor costs.

[0037] The relative movement between the positioning stage 2 and the welding stage 1 allows the welding stage 1 to move precisely on the positioning stage 2 along a preset direction (e.g., horizontal or vertical). This design enables the welding stage 1 to automatically adjust its position as needed during the welding process, thereby achieving precise welding of the welding strip area without manual operation and improving production efficiency. The main function of the laser positioning end 201 is to generate a precise second projection point 202 by projecting a laser onto the circular cover plate. The reflection of the laser can be used to detect in real time whether the weld strip on the cover plate is in the correct welding position. The laser can capture any possible irregular shapes such as skew, depression, or bulge. The second projection point 202 is a measurement point of the laser positioning end 201 on the circular cover plate, located in front of the weld strip. When the laser positioning end 201 projects the laser, this point serves as the positioning reference, ensuring the accuracy of the laser reflection data. The precise location of the second projection point 202 allows the welding machine to identify and correct any shape deviations in the weld strip in advance. Laser reflection is a crucial step in the positioning process. By projecting and receiving the reflected laser light, the system can determine whether the weld strip is skewed or has irregular shapes, such as depressions or protrusions. The system can automatically detect and prompt or correct these deviations, ensuring that welding at each location is performed under ideal conditions. The laser positioning end 201, by measuring the position of the weld strip in real time and combining it with the precise movement of the welding table 1, ensures that the welding machine can perform precise welding at each welding point. Based on the measured second projection point 202 and reflection data, the welding machine ensures that each welding area receives sufficient heat transfer and that the weld quality at each welding point meets the requirements.

[0038] The integration of the laser positioning end 201 with the welding station 1 enables precise laser measurement at every position during the welding process. Through laser projection and reflection analysis of the second projection point 202, the system can monitor the position of the strip to be welded in real time. If any offset or irregular shape occurs, the system can immediately detect and adjust it, avoiding welding defects caused by inaccurate positioning. The second projection point 202 is positioned along the extension direction of the strip to be welded and is located in front of the first projection point 102. This ensures that the welding machine performs complete laser positioning and inspection of the entire area of ​​the strip to be welded before performing welding. By measuring the entire welding area in advance, welding deviations caused by irregular shapes during the welding process can be avoided. The laser reflection detection results not only provide real-time feedback on whether there are problems in the welding area of ​​the cover plate, but also adjust the positioning of the welding station 1 based on the reflection data, ensuring the accuracy of each welding point during the welding process. If irregular shapes or deviations are detected, the welding machine can remedy the situation by adjusting the positioning system or correcting the welding path. The coordinated operation of laser positioning and the movement of the welding station 1 ensures a precise and efficient welding process. Through this synergistic effect, the system can avoid problems such as positioning errors and uneven welding that may occur in traditional manual welding, thereby improving welding quality and reducing the defect rate.

[0039] The pump circular cover plate welding machine adopts a split first drive end 3 and second drive end 4, which are connected by a central hole to assemble the circular cover plate. The combined design of the first drive end 3 and the second drive end 4 enables the circular cover plate to be welded efficiently and continuously via rotational drive. This drive method not only improves the continuity of welding, but also allows for flexible adaptation of circular cover plates with central holes of different sizes, enhancing the versatility of the equipment. The circular cover plate is connected to the first and second drive ends 4 via the central hole connection. The connection ensures that the circular cover plate is firmly fixed in the drive system, while providing rotational drive force. The rotational drive method allows the welding machine to automatically complete continuous welding tasks without manual intervention. Through the cooperation of the first drive end 3 and the second drive end 4, the weldable strip of the circular cover plate moves smoothly along its extension direction. During this process, each welding position on the weldable strip can be continuously welded via the laser welding end 101. During the welding process, the first projection point 102 gradually passes through the weldable strip, ensuring complete coverage of the welding task; the laser positioning end 201 acquires the data of the second projection point 202 by projecting a laser. The second projection point 202 is a pre-set key positioning point on the strip to be welded. The laser positioning end 201 can monitor the shape and position of the strip to be welded through reflected laser data. The laser positioning end 201 continuously tracks the second projection point 202, measuring the shape and position of the welding area in real time to ensure that there is no shape deviation or error during the welding process. The laser welding end 101 is controlled by the laser positioning end 201 to ensure accurate laser projection. Under the control of the first projection point 102 and the second projection point 202, the laser welding end 101 performs welding processing according to a predetermined path. When the surface shape of the weld strip becomes irregular or the circular cover plate moves eccentrically, the system will automatically shut down the laser welding end 101 to prevent unqualified welding. When an irregular surface shape or eccentric movement of the circular cover plate occurs during the welding process, the laser welding end 101 will automatically shut down, providing time and conditions for subsequent remedial work. This automatic remedial mechanism can ensure welding quality and avoid erroneous welding affecting subsequent production.

[0040] The first drive end 3 and the second drive end 4 work together to provide precise rotation of the circular cover plate. By using the first drive end 3 alone or both simultaneously, it can adapt to cover plates with different central hole diameters, ensuring stability during the welding process. The rotation drive system ensures continuous movement of the strip to be welded, thereby achieving uniform coverage of the welding area; the socket assembly not only ensures the stability of the circular cover plate but also allows the drive end to control the welding process through rotation. The design of the drive system enables the welding machine to adapt to circular cover plates of different specifications, while ensuring precise positioning and rotation of the cover plate during the welding process, avoiding problems caused by uneven rotation or unstable fixation in traditional manual welding; through rotation and movement, the welding machine can achieve continuous welding of the entire strip to be welded without manual intervention. During the rotation of the strip to be welded, the welding position changes continuously. The laser positioning system controls the welding end according to the precise position of the first projection point 102, ensuring that each welding point receives appropriate heat and welding treatment; the precise measurement and feedback function of the laser positioning end 201 allows the welding machine to continuously monitor the movement of the strip to be welded. If irregularities in shape or movement deviations are detected, the laser positioning end 201 can promptly transmit data and adjust the welding path to ensure the accuracy of the welding process. The operation of the laser welding end 101 is automatically controlled, ensuring welding occurs at the appropriate time and position. If the system detects irregularities or eccentric movement in the strip to be welded, the laser welding end 101 will be shut down to prevent incorrect welding. This function not only ensures the quality of the weld but also provides the possibility for subsequent remediation. The automated control system, combined with real-time monitoring of laser positioning data and welding status, can promptly identify problems and take corrective measures. After the laser welding end 101 is shut down, the system can adjust or correct the problematic cover plate, thereby ensuring that the welding quality is not affected. This remedial mechanism greatly improves the stability of the equipment and the controllability of production.

[0041] In summary, by employing automated drive, laser positioning, and intelligent control technologies, the problems of low efficiency, difficult quality control, and high safety risks in traditional welding methods have been solved, thereby improving production efficiency, ensuring welding quality, and reducing safety hazards for workers. This provides a feasible technical solution for mass production.

[0042] In any of the above embodiments, a pre-inspection band 5 is formed in the area between the second projection point 202 and the first projection point 102 along the extension direction. The length of the pre-inspection band 5 is set according to the welding radius and welding speed of the circular cover plate. Since the circular cover plate is funnel-shaped, there will be different welding radii and different welding speeds according to different production requirements during welding rotation at different positions. Therefore, adjusting the length of the pre-inspection band 5 changes the pre-inspection length and time of the laser positioning end 201 so as to ensure the welding yield under different production welding conditions.

[0043] In this embodiment, the pre-inspection zone 5 is located in the area between the second projection point 202 and the first projection point 102. The length of this area is set according to the welding radius and welding speed of the circular cover plate. The function of the pre-inspection zone 5 is to measure the position and shape of the weld strip in real time through the laser positioning end 201 during the welding process, providing preliminary positioning and adjustment for the welding process. This design can effectively pre-inspect the welding area to ensure that irregular shapes or deviations do not occur during the welding process.

[0044] Due to the funnel shape of the circular cover plate, the welding radius varies at different positions during the welding process. This causes changes in the movement speed and welding radius of the strip to be welded during the welding rotation at different positions. Furthermore, the welding rotation speed will vary depending on production requirements. To accommodate these variations, the length of the pre-inspection band 5 needs to be adjusted to ensure continuous tracking of the dynamic changes of the strip to be welded during the welding process.

[0045] The length of the pre-inspection band 5 can be dynamically adjusted according to changes in the welding radius and rotation speed to maintain high welding precision under different production welding conditions. As the radius of the circular cover plate and the welding rotation speed vary, the length of the pre-inspection band 5 will also change accordingly, thereby adjusting the detection range and time of the laser positioning end 201. Through this dynamic adjustment, the system can ensure that the welding machine can effectively perform pre-inspection and complete high-quality welding tasks under various production conditions.

[0046] The laser positioning end 201 monitors the shape and position of the strip to be welded in real time by acquiring data from the second projection point 202. When the shape or position of the strip to be welded deviates, the laser positioning end 201 can adjust the position and welding path of the laser welding end 101 based on the data from the pre-inspection band 5. As the length of the pre-inspection band 5 is adjusted, the positioning data obtained by the laser positioning end 201 becomes more accurate, thereby providing an optimized welding solution for the welding machine.

[0047] In actual production, due to the different sizes, shapes, and welding requirements of circular cover plates, the welding machine needs to be able to flexibly adjust according to different production states. The dynamic adjustment function of the pre-inspection band 5 allows the system to adjust the working range and inspection time of the laser positioning end 201 in real time under the condition of constantly changing welding radius and rotation speed, thereby ensuring welding quality and accuracy.

[0048] By precisely measuring and dynamically adjusting the pre-inspection band 5, irregular shapes or positional deviations during welding can be effectively avoided, thereby improving the welding yield. The setting of the pre-inspection band 5 and the control of the laser positioning end 201 ensure that welding of each area is completed under appropriate conditions, thus improving the pass rate of each batch of products.

[0049] Furthermore, the length of the pre-detection band 5 is calculated using the following formula:

[0050] L pre =2πk detect ·Δθ·r weld

[0051] In the formula, L pre The length of the pre-detection band 5; k detect The laser detection efficiency coefficient, r, represents the ratio of the laser positioning end 201 to the welding speed. weld Δθ is the radius of the circular cover plate where the strip to be welded is currently located; Δθ is the detection angle range of the laser positioning end 201 during the welding process; π is a constant and equal to 3.14.

[0052] In any of the above embodiments, the strip to be welded is an annular structure extending circumferentially along the circular cover plate, and has the following characteristics:

[0053] In scenario one, when the strip to be welded is located on the inner wall of the circular cover plate, the pre-detection strip 5 is located on the outer wall of the circular cover plate, thereby avoiding positioning interference to the laser positioning end 201.

[0054] In scenario two, when the strip to be welded is located on the outer wall of the circular cover plate, the pre-inspection strip 5 is located on the surface of the strip to be welded, so as to directly perform positioning and inspection on the surface and position of the strip to be welded.

[0055] In this embodiment, there are two main scenarios regarding the arrangement of the solder strip and the operation of the laser positioning end 201, each requiring a different configuration of the pre-inspection strip 5:

[0056] Regarding the description of Scenario 1, when the strip to be welded is located on the inner wall of the circular cover plate, the welding area is typically the inner diameter portion of the circular cover plate, and the strip to be welded extends circumferentially along the inner surface of the circular cover plate. The laser positioning end 201 is positioned on the outer wall of the circular cover plate, opposite to the position of the strip to be welded. Since the strip to be welded is located on the inner wall, the pre-detection band 5 of the laser positioning end 201 is located on the outer wall, thus avoiding interference from the strip to be welded itself. In this scenario, the pre-detection band 5 is located on the outer wall of the circular cover plate. This is because the laser positioning end 201 on the outer wall can avoid direct physical contact with the strip to be welded, avoiding potential obstruction or interference from the strip to be welded. The advantage of this configuration is that the laser positioning end 201 measures through the outer wall, accurately detecting the relative position of the strip to be welded on the inner wall, ensuring the continuity and accuracy of the welding, while avoiding the influence of the strip to be welded on the laser equipment.

[0057] Regarding scenario two, when the strip to be welded is located on the outer wall of the circular cover plate, the welding area is typically located on the outer diameter portion of the circular cover plate, with the strip extending along its circumference. In this case, the laser positioning end 201 directly positions and detects the strip on its surface. Since the strip is in contact with the outer wall of the circular cover plate, the laser positioning end 201 can directly locate the strip through its surface without needing to avoid any interference areas. In this scenario, the pre-detection band 5 is located on the surface of the strip, and the laser positioning end 201 performs precise measurements through the surface of the strip, directly detecting its surface and position. Because the strip is located on the outer wall, the laser positioning end 201 can directly detect changes in surface morphology and position, ensuring high precision and consistency during the welding process.

[0058] In any of the above embodiments, the first driving end 3 is mounted on the positioning stage 2, and the first driving end 3 includes a first rotating shaft 301 that rotates a circular cover plate through a central hole. The first rotating shaft 301 is powered by a motor connected to its bottom end, and the first rotating shaft 301 is fixed after being sleeved with the central hole by the elastic piece 6 at the top.

[0059] Along a preset direction, the first rotating shaft 301 is located between the laser welding end 101 and the laser positioning end 201 to avoid light interference between the laser welding end 101 and the laser positioning end 201, which could cause inaccurate welding and positioning.

[0060] In this embodiment, the first rotating shaft 301 is a key component of the pump circular cover plate welding machine, responsible for rotating the circular cover plate through the central hole, causing it to rotate in a predetermined direction. The first rotating shaft 301 is connected to a motor, which drives the circular cover plate to rotate, ensuring the continuity and stability of the welding operation. The first rotating shaft 301, in conjunction with the motor and the elastic plate 6 at the bottom, effectively transmits power to the circular cover plate and ensures rotational accuracy. By rotating the circular cover plate, the first rotating shaft 301 causes the weldable strip to gradually pass through the laser welding end 101 along the welding trajectory for continuous welding. The motor provides power to the first rotating shaft 301, driving the circular cover plate to rotate. The power and speed control of the motor directly affect the speed and stability during the welding process. The motor's operation control system closely coordinates with the rotational speed of the first rotating shaft 301 to ensure that the weldable strip can move stably along the preset trajectory during the welding process, avoiding welding deviations caused by unstable speed. The elastic plate 6 achieves sleeve and fixation with the central hole through its top structure. It ensures that the first rotating shaft 301 maintains a stable position during rotation, preventing the shaft from shifting due to vibration or external forces. The elastic plate 6 provides the necessary elastic support to accommodate the movement of the circular cover plate and ensure a secure connection between it and the shaft. The function of the elastic plate 6 is to ensure that the shaft can be firmly fixed in the central hole, preventing the shaft from loosening or misaligning due to inertial forces or load changes during rotation, thereby maintaining the stability of the welding operation.

[0061] The laser welding end 101 is responsible for focusing the laser beam onto the weld strip for precise welding. During welding, the accuracy of the laser beam directly affects the welding quality, therefore its position needs strict control. The laser welding end 101 needs to operate stably in a preset position to ensure the accuracy of the welding path. If the welding end's position is inaccurate, both the welding quality and yield will be affected. The laser positioning end 201 measures the position of the weld strip in real time through laser projection, ensuring accurate positioning of every point during the welding process. When the weld strip deviates from the predetermined position, the laser positioning end 201 can provide feedback signals to adjust the welding trajectory. By monitoring the position of the weld strip, the laser positioning end 201 ensures precise tracking of the weld strip during the welding process and adjusts the welding path in real time. Inaccurate positioning will affect the welding quality. The first rotating shaft 301 is designed at a preset position between the laser welding end 101 and the laser positioning end 201 to avoid optical interference between them. Since the working principle of the laser welding end 101 and the laser positioning end 201 relies on the precise projection of the laser, any obstruction or optical interference will lead to inaccurate positioning or welding. The rational layout of the first rotating shaft 301 ensures that the propagation path of the laser beam is unobstructed; the first rotating shaft 301 not only ensures the stable rotation of the circular cover plate, but also avoids mutual interference between laser systems through its reasonable positioning. By maintaining sufficient spacing and precise positioning between them, efficient operation of laser welding and positioning is guaranteed.

[0062] In any of the above embodiments, the first driving end 3 further includes a first adjusting seat for connecting the laser positioning end 201 and the first rotating shaft 301.

[0063] The first adjustment seat is used to drive the circular cover plate to move along the axial direction of the central hole through the first rotating shaft 301, so that the laser positioning end 201 emits and the corresponding second projection point 202 moves along the curved surface of the circular cover plate, and changes the circumferential position of different radii to adjust the length of the pre-detection band 5.

[0064] In this embodiment, the main function of the first adjustment seat is to adjust the position of the laser positioning end 201 by connecting the laser positioning end 201 and the first rotating shaft 301. Specifically, it can drive the first rotating shaft 301 to move the laser positioning end 201 along the axial direction of the circular cover plate and adjust the position of the second projection point 202 of the laser positioning end 201, thereby changing its circumferential position on the curved surface of the circular cover plate.

[0065] The first rotating shaft 301 is powered by a motor connected to its bottom end, driving the circular cover plate to rotate. During rotation, the movement of the first rotating shaft 301 causes the first adjusting seat and the laser positioning end 201 to translate along the axis of the central hole. The laser positioning end 201 measures the relative position of the strip to be welded by emitting and receiving reflected laser light. When the first adjusting seat adjusts the laser positioning end 201, the second projection point 202 of the laser positioning end 201 also changes position accordingly.

[0066] By adjusting the position of the second projection point 202 of the laser positioning end 201, the first adjustment seat can dynamically adjust the length of the pre-inspection band 5. The length of the pre-inspection band 5 is related to the welding radius and curved surface position of the weld strip, and usually needs to be varied according to the requirements of different welding areas. The first adjustment seat can adjust the specific position of the laser positioning end 201, thereby precisely controlling the length of the pre-inspection band 5, so that the laser positioning end 201 can adapt to the changes in the curved surface in welding areas with different radii, ensuring the quality and accuracy of the welding; the length of the pre-inspection band 5 is dynamically calculated based on the radius of the circular cover plate and the position of the laser positioning end 201.

[0067] Specifically, the first adjusting seat includes a first lifting arm 302 and a first single-axis drive arm 303, and the positioning table 2 includes a fixed seat 203. The first lifting arm 302 and the laser positioning end 201 are mounted on the upper surface of the fixed seat 203. The moving end of the first lifting arm 302 is mounted on the first single-axis drive arm 303, and the moving end of the first single-axis drive arm 303 is fixedly assembled with the bottom motor of the first rotating shaft 301.

[0068] As described above, the main function of the first lifting arm 302 is to provide vertical adjustment to regulate the height of the laser positioning end 201. Through the vertical lifting of the first lifting arm 302, the laser positioning end 201 can be precisely adjusted between different welding areas, thus adapting to the requirements of different welding radii and welding paths. The first single-axis drive arm 303 is used to provide horizontal movement adjustment for the laser positioning end 201. Its main function is to control the position of the laser positioning end 201 in the horizontal direction to ensure that its second projection point 202 can move precisely along the curved surface of the circular cover plate. The first adjustment seat, by integrating the first lifting arm 302 and the first single-axis drive arm 303, can flexibly adjust the position of the laser positioning end 201 in space, achieving precise positioning of the strip to be welded. It allows the laser positioning end 201 to move freely in both vertical and horizontal directions to adapt to the requirements of different welding areas.

[0069] The first rotating shaft 301 transmits power from the motor to the circular cover plate, driving it to rotate along a predetermined trajectory. It works in conjunction with the first single-axis drive arm 303 to ensure that the laser positioning end 201 can move along the curved surface of the circular cover plate for precise welding positioning. The first rotating shaft 301 and the first single-axis drive arm 303 are mechanically connected to form a linkage, allowing the first single-axis drive arm 303 to adjust the position of the laser positioning end 201 according to the movement of the shaft when the motor drives the circular cover plate to rotate. This synergistic effect ensures that the laser positioning end 201 maintains a constant relative position with the circular cover plate throughout the welding process, thereby improving welding accuracy.

[0070] Furthermore, the first adjusting seat also includes a first rotating wheel 304, the central shaft of which is connected to a motor. Two first single-axis drive arms 303 are provided. The first rotating wheel 304 is fixed to the moving end of the first single-axis drive arm 303 by the motor. The two first single-axis drive arms 303 are used to clamp and rotate the side wall of the circular cover plate. The drive adjustment of the two first single-axis drive arms 303 can adapt to circular cover plates of different thicknesses.

[0071] As described above, the main function of the first rotating wheel 304 is to provide clamping and rotational drive for the sidewall of the circular cover plate. A motor is connected to the central shaft of the first rotating wheel 304, which drives the wheel's rotation, thereby causing the circular cover plate to rotate along its sidewall. Through this mechanism, the first rotating wheel 304 can achieve rotation and clamping of the circular cover plate, ensuring that the cover plate maintains a stable rotational trajectory during welding. The first rotating wheel 304 is fixed to the moving ends of the two first single-axis drive arms 303 via a motor, allowing the two first single-axis drive arms 303 to jointly clamp the sidewall of the circular cover plate. This design ensures that the circular cover plate maintains stable and uniform rotation during the rotation process, avoiding welding errors caused by unstable clamping.

[0072] Each first single-axis drive arm 303 includes a drive end and a moving end. The main function of the first single-axis drive arm 303 is to control the position of the first rotating wheel 304 and adjust the rotational clamping force of the circular cover plate. Through the cooperation of two first single-axis drive arms 303, the sidewall of the circular cover plate can be uniformly clamped and rotated. The cooperation of the two first single-axis drive arms 303 allows them to adapt to circular cover plates of different thicknesses. By adjusting the distance between them, the clamping force can be varied, ensuring stable clamping and rotation of circular cover plates of different thicknesses. The motor drives the rotation of the first rotating wheel 304, and the power provided by the motor is transmitted to the first rotating wheel 304 through the central shaft, thereby driving the rotation of the circular cover plate. By precisely controlling the motor's speed and direction of rotation, the rotational speed and direction of the circular cover plate can be precisely adjusted, ensuring welding accuracy. The design of the first rotating wheel 304 enhances the rotational stability of the circular cover plate, avoiding welding defects caused by instability or misalignment of the circular cover plate that may occur in traditional welding processes.

[0073] The motor is connected to the first rotating wheel 304 via a central shaft, providing rotational power to drive the rotation of the first rotating wheel 304, thereby achieving the clamping and rotation of the circular cover plate. The motor speed can be adjusted to meet the needs of different welding processes.

[0074] In any of the above embodiments, the second driving end 4 is connected to the welding station 1, and the second driving end 4 includes a second rotating shaft 401 with a rotating circular cover plate. The second rotating shaft 401 is powered by a motor connected to its bottom end, and the second rotating shaft 401 is fixed after being fitted with the center hole by the elastic plate 6 at the top.

[0075] When a large-diameter fixing is required for a circular cover plate, the second rotating shaft 401 and the first rotating shaft 301 are respectively attached to the inner wall of the central hole, and the axis of the central hole is located between the second rotating shaft 401 and the first rotating shaft 301. The circular cover plate is rotated by the joint clamping of the second rotating shaft 401 and the first rotating shaft 301.

[0076] In this embodiment, the first rotating shaft 301 and the second rotating shaft 401 respectively conform to the inner wall of the central hole and work together during the rotation of the circular cover plate. In this way, the two rotating shafts jointly clamp the central hole and drive the circular cover plate to rotate, ensuring that it maintains a stable rotation state during the welding process; the first rotating shaft 301 and the second rotating shaft 401 are each connected to an independent motor, and through precise power transmission and distribution, the two work together to drive the circular cover plate stably and efficiently.

[0077] The second rotating shaft 401, together with the first rotating shaft 301, drives the circular cover plate to rotate. This rotation function is achieved through precise motor control and the coordination of the two rotating shafts, enabling the circular cover plate to maintain a stable and continuous rotation during the welding process. The rotation of the circular cover plate ensures that each part of the weld band is heated evenly during the welding process, avoiding local overheating or undercooling that may occur in traditional welding methods, thereby improving the welding quality and consistency.

[0078] In any of the above embodiments, the second driving end 4 further includes a second adjusting seat, which is connected to the laser welding end 101.

[0079] The second adjustment seat is used to move the laser welding end 101 in a direction perpendicular to the preset direction to adjust the length of the pre-inspection band 5.

[0080] In this embodiment, the main function of the second adjusting seat is to move the laser welding end 101 along a direction perpendicular to a preset direction. This movement adjustment can change the contact position between the laser welding end 101 and the circular cover plate, thereby adjusting the position of the welding path and the length of the pre-inspection band 5. By precisely adjusting the position of the laser welding end 101, the positioning accuracy during the welding process can be ensured, avoiding uneven welding or positional deviation. Since the distance of the laser welding end 101 is adjusted according to the position change of the circular cover plate during the welding process, the second adjusting seat ensures the consistency between the length of the pre-inspection band 5 and the actual welding position. By controlling the movement of the laser welding end 101 along the vertical direction, the length of the pre-inspection band 5 can be precisely set and adjusted, ensuring that every position in the entire area to be welded can be accurately positioned and welded during the welding operation.

[0081] Furthermore, the pump circular cover welding machine also includes a base plate 7 and a second single-axis drive arm 10. The second single-axis drive arm 10 and the fixed seat 203 are mounted on the base plate 7. The moving end of the second single-axis drive arm 10 is fixedly connected to the welding table 1 to enable the welding table 1 to move along a preset direction. The preset direction can be as follows: Figure 1 The x-axis direction is shown.

[0082] Specifically, the second adjustment seat includes a second lifting arm 402 and a third single-axis drive arm 403. The second lifting arm 402 is installed on the moving end of the second single-axis drive arm 10, and the third single-axis drive arm 403 is installed on the moving end of the second lifting arm 402.

[0083] Furthermore, the second adjustment seat also includes a second rotating wheel 404, a motor is connected to the central shaft of the first rotating wheel 304, and two third single-axis drive arms 403 are provided. The second rotating wheel 404 is fixed to the moving end of the third single-axis drive arm 403 by the motor. The two third single-axis drive arms 403 are used to clamp and rotate the side wall of the circular cover plate, and the drive adjustment of the two third single-axis drive arms 403 can adapt to circular cover plates of different thicknesses.

[0084] Furthermore, a controller 8 and an electric control switch 9 are also installed on the base plate 7, and are electrically connected to the welding station 1, the positioning station 2, the first drive end 3 and the second drive end 4 respectively, for electric control and adjustment of the length of the pre-testing belt 5.

[0085] As described above, controller 8 is responsible for coordinating and controlling the operation of welding station 1, positioning station 2, first drive end 3, and second drive end 4. Controller 8 adjusts the actions of each component through electrical control signals, ensuring they work in coordination according to preset instructions and times. Controller 8 can automatically adjust the positions of welding station 1 and positioning station 2 based on real-time welding status, work requirements, and production parameters (such as welding radius, welding speed, and pre-inspection band 5 length), optimizing the welding process. This ensures precise execution of each step in the welding process, avoiding interference from human factors. Controller 8 can also monitor the equipment's operating status in real time and diagnose equipment faults based on feedback detection data, making timely adjustments or shutdowns to ensure stable operation of the welding machine.

[0086] The electrical control switch 9 is used to start and stop various functional modules of the welding machine, including the welding table 1, the positioning table 2, the first drive end 3, and the second drive end 4. Through the electrical control switch 9, the operator can control the welding machine's on / off state as needed, ensuring precise execution of each operation. The electrical control switch 9 can also be used to switch between different working modes (such as adjusting the movement trajectory of the laser welding end 101, adjusting the length of the pre-inspection band 5, etc.), thus providing flexible control options for different welding tasks.

[0087] In any of the above embodiments, when the strip to be welded is located on the inner wall of the circular cover plate:

[0088] The second rotating shaft 401 and the first rotating shaft 301 together drive the circular cover plate to rotate, and the laser welding end 101 is located inside the central hole.

[0089] The first rotating shaft 301 drives the circular cover plate to rotate, and the laser welding end 101 is located outside the central hole.

[0090] In this embodiment, when the strip to be welded is located on the inner wall of the circular cover plate, the second rotating shaft 401 and the first rotating shaft 301 work together, driven by their respective motors, to rotate the circular cover plate. This driving method ensures stable rotation of the circular cover plate on the inner wall, avoiding angular errors or uneven rotation that may be caused by a single rotating shaft. The laser welding end 101 is positioned inside the central hole, ensuring that the laser can directly irradiate the strip to be welded on the inner wall during the welding process. This design can precisely control the position and uniformity of the welding point, ensuring welding quality.

[0091] When the strip to be welded is located on the outer wall of the circular cover plate, the first rotating shaft 301 independently undertakes the task of rotating the circular cover plate. Driven by a motor, the first rotating shaft 301 causes the circular cover plate to rotate around its axis. Due to the structural characteristics of the outer wall relative to the inner wall, the welding operation on the outer wall usually does not require the assistance of the second rotating shaft 401; therefore, using a single rotating shaft drive is simpler and more efficient. At this time, the laser welding end 101 is positioned outside the central hole, ensuring that the welding end can be precisely aligned with the strip to be welded on the outer wall. The position adjustment of the laser welding end 101 and the welding operation can be finely adjusted according to the instructions of the controller 8 to ensure welding quality and uniformity.

[0092] In any of the above embodiments, the positioning data includes the distance value between the laser positioning end 201 and the second projection point 202 at each time moment, and the laser welding end 101 is controlled by the following rules:

[0093] Determine whether the absolute value of the difference between the distance value and the radius value of the strip to be welded at each moment is less than the first threshold. If not, turn off the laser welding end 101. If the radius value of the circular cover plate corresponding to the strip to be welded remains unchanged, it proves that the part to be welded has deviated or turned. The first threshold can be set based on the adjusted distance value and the pre-measured radius value. If so, turn on the laser welding end 101 continuously.

[0094] Determine whether the absolute value of the difference between the distance values ​​at adjacent time points is greater than the second threshold. If so, turn off the laser welding end 101. If the distance values ​​at adjacent time points have a large numerical difference, it proves that the part to be welded has deviated or turned. Otherwise, keep the laser welding end 101 on.

[0095] In this embodiment, at each moment, the distance between the laser positioning end 201 and the second projection point 202 (i.e., the relative position of the weld strip and the laser positioning end 201) is obtained in real time through laser ranging or other sensor devices. This data reflects the accuracy of the welding position during the welding process, ensuring that the welding end can be accurately positioned in the correct location of the weld strip; this distance value is directly used to determine the offset and deformation of the weld strip. By comparing it with a predetermined radius value, any deviations or deflections that may occur during the welding process can be detected in a timely manner and corrected by controlling the switching on and off of the laser welding end 101.

[0096] First, the difference between the radius and distance values ​​of the strip to be welded is used to determine if a deviation has occurred. If the absolute value of the difference between the distance and the radius is greater than a first threshold, the welding position is considered to be off, and the laser welding end 101 is shut off. This ensures that welding is not performed when the deviation is too large, avoiding poor welding results due to inaccurate positioning. If the difference is less than the first threshold, the welding position is normal, and the laser welding end 101 can continue to be turned on for normal welding. Furthermore, by monitoring the changes in distance values ​​at adjacent time points, if the absolute value of the distance difference between adjacent time points is greater than a second threshold, the welding position is considered to have changed significantly or deviated, and the laser welding end 101 should be shut off to avoid continuing to weld in the wrong position. If the distance change between adjacent time points is small (i.e., less than the second threshold), the position of the strip to be welded is stable, and the laser welding end 101 can continue to be turned on to maintain the continuity and accuracy of the welding process.

[0097] The distance value reflects the relative position between the laser positioning end 201 and the strip to be welded. It is compared with a preset first threshold and a second threshold to determine the correctness of the welding position. If the deviation is too large, the system will shut down the laser welding end 101 to avoid poor welding and ensure welding quality. If the deviation is small and stable, the system will continue welding to ensure welding efficiency.

[0098] By employing dual detection with a first and a second threshold, the system can accurately detect any deviations or anomalies during the welding process, preventing substandard products caused by incorrect welding positions or deflection of the weld strip. The threshold settings take into account both the machine's operating characteristics and the product's standard requirements, avoiding false alarms while ensuring effective response to significant changes.

[0099] Specifically, the welding station 1 includes a laser generator 103, and the laser welding end 101 is a laser amplifier. The laser amplifier and the laser generator 103 are connected by a reflector and an optical fiber so that the laser amplifier can change the laser emission point and direction.

[0100] As described above, the laser amplifier and the laser generator 103 are connected via a reflector and an optical fiber. The reflector guides the laser from the laser generator 103 into the optical fiber, which then transmits the laser to the laser amplifier. This connection structure ensures efficient laser energy transmission and allows for adjustment of the laser's direction and emission point when necessary. Through this connection system, the laser amplifier can adjust the laser's emission position in multiple locations and directions. In this way, the welding system can adjust the precise position of the laser during the welding process according to actual needs, ensuring that the laser energy accurately covers the area to be welded.

[0101] The fiber optic cable serves to transmit laser energy from the laser generator 103 to the laser amplifier and further guide the laser to the welding position. The fiber optic cable can efficiently transmit laser energy, ensuring that the beam intensity does not attenuate, and can flexibly transmit laser energy in complex spatial layouts. In the welding system, the fiber optic cable connects the laser generator 103 and the laser amplifier, enabling the laser beam to be transmitted and adjusted within a certain spatial range.

[0102] Furthermore, a welding rod drive wheel 104 is installed on the laser welding end 101 to facilitate the transfer of welding rods.

[0103] As described above, the main function of the electrode drive wheel 104 is to ensure that the electrode can be stably and continuously fed into the welding area. During laser welding, the laser not only locally heats and melts the material, but also forms a weld pool through its interaction with the electrode, thus joining the workpieces at both ends. The electrode drive wheel 104 ensures the transmission and control of the electrode, maintaining a stable electrode supply during the welding process and preventing welding defects caused by insufficient or uneven electrode delivery.

[0104] The electrode drive wheel 104, through rotation and transmission mechanism, transports the welding electrode from the feeding end to the laser welding end 101. By linking with the electrode feeding system, it automatically supplies the required length and quantity of welding electrodes to maintain the stability of the welding process. In each welding cycle, the electrode drive wheel 104 ensures that the welding electrode is consistently fed into the welding area and effectively combined with the laser heat source.

[0105] In any of the above embodiments, before the laser welding end 101 is started, the second projection point 202 passes through a path of at least one pre-detection band 5 on the surface of the circular cover plate in order to perform pre-detection before starting, so as to ensure that the welding area is a pre-detected position.

[0106] In this embodiment, the pre-inspection zone 5 refers to the inspection area projected onto the strip to be welded by the laser positioning end 201 through the optical system before welding. It is located in front of the welding area to ensure accurate positioning and calibration of the strip to be welded before welding. The second projection point 202 moves along the surface of the circular cover plate, covering the path of the pre-inspection zone 5 to perform positioning inspection of the strip to be welded. In this way, it is ensured that the surface of the strip to be welded has been accurately positioned before welding, avoiding quality problems caused by positional deviations or errors during welding.

[0107] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0108] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A pump circular cover plate welding machine, characterized in that, The pump circular cover plate welding machine includes components for welding circular cover plates with central holes: A welding station includes a laser welding end; the laser welding end corresponds to the strip to be welded on the circular cover plate, and the laser welding end has a first projection point on the strip to be welded; The positioning table, the welding table being movable relative to the positioning table along a preset direction; the positioning table includes a laser positioning end, the laser positioning end being perpendicular to the preset direction and corresponding to the pump circular cover plate, and the laser positioning end having a second projection point on the pump circular cover plate; along the extension direction of the strip to be welded, the second projection point is located in front of the first projection point. The first and second driving ends, which are separately configured, are fitted with the circular cover plate through the central hole. The first and second driving ends cooperate to drive the strip to be welded to move along the extension direction and make the first projection point gradually pass through the strip to be welded. During the movement of the strip to be welded, the laser positioning end controls the laser welding end by using the positioning data obtained from the second projection point.

2. The pump circular cover plate welding machine according to claim 1, characterized in that, A pre-inspection zone is formed between the second projection point and the first projection point along the extension direction. The length of the pre-inspection zone is set according to the welding radius and welding speed of the circular cover plate.

3. The pump circular cover plate welding machine according to claim 2, characterized in that the strip to be welded is an annular structure extending circumferentially along the circular cover plate, and has the following characteristics: Scenario 1: When the strip to be welded is located on the inner wall of the circular cover plate, the pre-inspection strip is located on the outer wall of the circular cover plate; In scenario two, when the strip to be welded is located on the outer wall of the circular cover plate, the pre-inspection strip is located on the surface of the strip to be welded.

4. The pump circular cover plate welding machine according to claim 2, characterized in that, The first drive end is mounted on the positioning platform, and the first drive end includes a first rotating shaft that rotates the circular cover plate through the central hole; Along the preset direction, the first rotating shaft is located between the laser welding end and the laser positioning end.

5. The pump circular cover plate welding machine according to claim 4, characterized in that, The first drive end also includes a first adjustment seat for connecting the laser positioning end and the first rotating shaft; The first adjusting seat is used to drive the circular cover plate to move along the axial direction of the central hole via the first rotating shaft, so as to adjust the length of the pre-detection strip.

6. The pump circular cover plate welding machine according to claim 4, characterized in that, The second driving end is connected to the welding station, and the second driving end includes a second rotating shaft for rotating the circular cover plate; The second rotating shaft and the first rotating shaft are respectively attached to the inner wall of the central hole, and the axis of the central hole is located between the second rotating shaft and the first rotating shaft.

7. The pump circular cover plate welding machine according to claim 6, characterized in that, The second driving end also includes a second adjusting seat, which is connected to the laser welding end; The second adjustment seat is used to drive the laser welding end to move along a direction perpendicular to the preset direction in order to adjust the length of the pre-inspection band.

8. The pump circular cover plate welding machine according to claim 6, characterized in that, When the strip to be welded is located on the inner wall of the circular cover plate: The second and first rotating shafts together drive the circular cover plate to rotate, with the laser welding end located inside the central hole; or The first rotating shaft drives the circular cover plate to rotate, and the laser welding end is located outside the central hole.

9. The pump circular cover plate welding machine according to claim 2, characterized in that, The positioning data includes the distance between the laser positioning end and the second projection point at each moment, and the laser welding end is controlled by the following rules: Determine whether the absolute value of the difference between the distance value and the radius value of the strip to be welded at each time point is less than a first threshold; otherwise, shut down the laser welding end. Determine whether the absolute value of the difference between the distance values ​​at adjacent time points is greater than a second threshold; if so, shut down the laser welding end.

10. The pump circular cover plate welding machine according to claim 9, characterized in that, Before the laser welding end is activated, the second projection point passes through a path of at least one pre-detection band length on the surface of the circular cover plate.

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