A block stator rounding welding machine

Abstract

The application provides a block stator whole circle welding machine, and relates to the technical field of motor stator processing, which comprises a workbench, a circle assembling assembly, a pressing assembly, a welding assembly, a demolding assembly and a carrying device. The circle assembling assembly comprises a splicing turntable and a plurality of splicing blocks which are installed on the splicing turntable in the radial direction through guide rails. The front end of the splicing block is provided with an installation groove, and the radial spring is arranged between the rear end of the splicing block and the splicing turntable. When the splicing block moves in the radial direction to the inside under the action of the radial spring and the side walls of the splicing blocks are attached to each other, the stator in the installation groove is completed circle assembling. The bottom of the splicing turntable is provided with a pushing mechanism. The pressing assembly presses the stator into a cylindrical jig, the welding assembly emits a laser beam through the strip-shaped through hole of the cylindrical jig to weld the splicing joint between the stators, and the demolding assembly demolds the stator after welding. The application has high automation and intelligence, and can effectively improve the processing quality and efficiency of the block stator.

Description

Technical Field

[0001] This utility model relates to the field of motor stator processing technology, and in particular to a modular stator round welding machine. Background Technology

[0002] Modular stators are manufactured by dividing the circumference of the iron core into several sector-shaped blocks, which are then assembled into a complete circle. The key to this assembly process lies in firmly and precisely connecting the blocks into a rigid whole along the circumference; welding is currently the most widely used method. However, traditional manual welding suffers from problems such as inconsistent quality, low efficiency, and harsh working environments. Simple tooling-assisted welding also struggles to effectively solve the problems of deformation control and precision. Therefore, there is an urgent need for a highly automated and intelligent specialized equipment to improve the processing quality and efficiency of modular stators. Utility Model Content

[0003] The purpose of this invention is to provide a modular stator round welding machine to solve the technical problems in the background art and improve the processing quality and efficiency of modular stators.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: A modular stator circular welding machine includes a worktable, a circular assembly component, a pressing component, a welding component, a demolding component, and a conveying device, all mounted on the worktable.

[0005] The splicing assembly includes a splicing turntable and several splicing blocks radially mounted on the splicing turntable via guide rails. The front end of each splicing block has a mounting groove for placing a single stator, and a radial spring is provided between its rear end and the splicing turntable. When the splicing blocks move radially inward along the guide rails under the action of the radial springs until the side walls of the splicing blocks fit together, the stators in the mounting grooves are completed in a circular shape. A pushing mechanism is provided at the bottom of the splicing turntable to overcome the force of the radial springs, drive the splicing blocks to move radially outward along the guide rails and separate them from each other.

[0006] The press-fit assembly is used to press and fix the completed stator into a cylindrical fixture; the cylindrical fixture has multiple strip-shaped through holes on its side wall, the positions of which correspond to the joint positions between the stators, and are used to expose the joints to be welded.

[0007] The welding assembly includes multiple laser welders that emit laser beams that pass through strip-shaped through-holes on the sidewall of the cylindrical fixture and weld the seams.

[0008] The demolding assembly is used to hold the cylindrical fixture in place and to push the welded stator out of the cylindrical fixture.

[0009] Furthermore, the assembly also includes a drive cylinder fixedly installed at the bottom of the splicing turntable, which has a central through hole; the pushing mechanism includes a lifting electric cylinder and a lifting shaft, the lifting electric cylinder is used to drive the lifting shaft to move up and down in the vertical direction, the lifting shaft passes through the central through hole coaxially through a bearing assembly and forms a sliding fit with the splicing turntable; the top of the lifting shaft is provided with a tapered chamfer, and the end of the splicing block facing the center is provided with an inclined structure. When the lifting electric cylinder drives the lifting shaft to move upward, the tapered chamfer contacts the inclined structure and pushes the splicing block radially outward, so that the splicing blocks move along the guide rail to the side wall of the splicing block and separate from each other.

[0010] Furthermore, a magnet mounting hole is provided on the side of the mounting groove away from the center, and a magnet is installed in the magnet mounting hole.

[0011] Furthermore, the cylindrical fixture includes a cylindrical body and an annular positioning flange, with positioning holes provided on the annular positioning flange; the press-fit assembly includes a positioning plate, with a push hole in the middle of the positioning plate, a downward pressing electric cylinder mounted on the upper end of the push hole via a bracket, and a cylindrical pressing head mounted downward on the moving end of the downward pressing electric cylinder; a push-pull electric cylinder mounted on the lower end of the push hole via a bracket, and a cylindrical push rod mounted upward on the moving end of the push-pull electric cylinder; positioning pins that mate with the positioning hole are provided around the push hole, as well as a pneumatically controlled pressure rod for pressing the annular positioning flange.

[0012] Furthermore, the demolding assembly has the same structure as the pressing assembly and is arranged side by side with the pressing assembly and the welding assembly.

[0013] Furthermore, the welding assembly includes a welding turntable and three laser welders arranged around the welding turntable, with the three laser welders at the same angle.

[0014] Furthermore, it also includes a weld seam detector, which is positioned between any two laser welders.

[0015] Furthermore, the conveying device includes a loading and conveying assembly for conveying a single stator to the assembly. The loading and conveying assembly includes a three-axis moving mechanism. The moving end of the three-axis moving mechanism is vertically mounted with a mounting plate. The mounting plate is equipped with several independent up-and-down moving cylinders arranged side by side. The moving end of each up-and-down moving cylinder is connected to a stator gripper.

[0016] Furthermore, the conveying device also includes a whole-circle conveying assembly for conveying the assembled stator to the pressing assembly; the whole-circle conveying assembly includes a whole-circle turntable, a linear motion mechanism fixedly installed on the whole-circle turntable, and a slide plate that reciprocates in the horizontal direction at the moving end of the linear motion mechanism; a pair of long-arm grippers are installed on the slide plate, the gripping ends of the long-arm grippers extend out of one end of the slide plate, and the gripping ends have semi-circular notches. When the two long-arm grippers close, the circular notches fit and clamp the outer circumference of the stator; a pneumatic control mechanism for controlling the opening and closing of the long-arm grippers is fixedly installed at the other end of the slide plate.

[0017] Furthermore, the conveying device also includes a two-axis conveying assembly and a conveying and unloading assembly. The two-axis conveying assembly is used to convey the cylindrical fixture with the stator pressed into the pressing assembly, welding assembly and demolding assembly in sequence. The conveying and unloading assembly is used to unload the stator after demolding. A buffer bracket is also provided at the location of the pressing assembly, welding assembly and demolding assembly. The buffer bracket is used to temporarily place the cylindrical fixture.

[0018] The beneficial effects of this utility model are as follows: by automating the handling, rounding, pressing, welding and demolding operations of the stator through the assembly, pressing, welding and demolding components, as well as the handling device, this utility model has a high level of automation and intelligence, and can effectively improve the processing quality and efficiency of the assembled stator. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the modular stator circular welding machine in this embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the circular assembly in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the splicing block and the splicing turntable in the embodiment of this utility model; Figure 4 This is a schematic diagram of the stator structure in the cylindrical fixture in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the circular assembly in an embodiment of this utility model; Figure 6 This is a cross-sectional view of the press-fit assembly in an embodiment of this utility model; Figure 7 This is a schematic diagram of the welding assembly in an embodiment of the present invention; Figure 8 This is a schematic diagram of the material handling assembly in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the round conveying assembly in an embodiment of this utility model.

[0020] Among them, 1: workbench; 2: round assembly; 3: press assembly; 4: welding assembly; 5: demolding assembly; 6: handling device; 7: stator; 8: cylindrical fixture; 21: splicing turntable; 22: splicing block; 23: radial spring; 24: pushing mechanism; 25: drive cylinder; 221: mounting groove; 222: inclined structure; 241: top opening shaft; 242: tapered chamfer; 31: positioning plate; 32: top pushing hole; 33: downward pressing electric cylinder; 34: cylindrical pressure head; 35: ... 36: Pushing electric cylinder; 37: Cylindrical push rod; 41: Pneumatic control pressure rod; 42: Laser welder; 43: Welding turntable; 44: Weld seam detector; 65: Material handling assembly; 66: Round handling assembly; 67: Three-axis moving mechanism; 68: Mounting plate; 69: Up and down moving cylinder; 60: Stator gripper; 610: Round turntable; 621: Linear moving mechanism; 622: Sliding plate; 623: Long arm gripper; 624: Pneumatic control mechanism; 85: Strip-shaped through hole. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly. The connection can be a direct connection or an indirect connection.

[0024] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] like Figure 1The diagram shown is a structural schematic of a stator integral circle welding machine according to one embodiment of the present invention. In this embodiment, the stator integral circle welding machine includes a worktable 1, a circle assembly 2, a pressing assembly 3, a welding assembly 4, a demolding assembly 5, and a conveying device 6, all mounted on the worktable 1.

[0026] The processing flow of the stator block welding machine provided in this embodiment is as follows: First, individual stator blocks are placed into the block assembly 2, which assembles them into a complete circular stator 7. The transport device 6 picks up the assembled stator 7 from the block assembly 2 and transfers it to the pressing assembly 3. The pressing assembly 3 presses the assembled stator 7 into a cylindrical fixture 8, which facilitates welding. The welding assembly 4 welds the seams between the stators 7, welding them into a solid whole. After welding, the transport device 6 transfers the welded stator 7 and its cylindrical fixture 8 to the demolding assembly 5. The demolding assembly 5 ejects the welded stator 7 from the cylindrical fixture 8. The transport device 6 is used to sequentially transport the stator 7 or the cylindrical fixture 8 carrying the stator 7 in the corresponding process state between the block assembly 2, the pressing assembly 3, the welding assembly 4, and the demolding assembly 5. The conveying device 6 can be composed of multiple conveying mechanisms with different grippers. Each gripper can be designed for the stator 7 and cylindrical fixture 8 in different process states. The conveying mechanisms are respectively set between different working components. In this embodiment, through the automated collaborative action between the components, the automatic conveying, rounding, pressing, welding and demolding operations of the stator 7 are completed.

[0027] like Figure 2 and Figure 3 As shown, in this embodiment, the splicing assembly 2 includes a splicing turntable 21 and a plurality of splicing blocks 22 radially mounted on the splicing turntable 21 via guide rails; the front end of the splicing block 22 is provided with a mounting groove 221 for placing a single stator 7, and a radial spring 23 is provided between its rear end and the splicing turntable 21; when the splicing block 22 moves radially inward along the guide rail under the action of the radial spring 23 until the side walls of the splicing block 22 are in contact with each other, the stator 7 in the mounting groove 221 completes the splicing; a pushing mechanism 24 is provided at the bottom of the splicing turntable 21 to overcome the force of the radial spring 23, drive the splicing block 22 to move radially outward along the guide rail and separate from each other.

[0028] The radial guide rail provides a strict and unique radial motion constraint for each splicing block 22, ensuring that all splicing blocks 22 can only move precisely along the radial direction, avoiding skewness or misalignment, and guaranteeing high precision in the splicing process. Each splicing block 22 is independently equipped with a radial spring 23, providing an independent and uniform centripetal driving force, causing the splicing block 22 to be subjected to a force towards the center of the splicing turntable 21. The spring drives the splicing blocks 22 to move automatically and synchronously towards the center along the guide rail, without the need for complex external drives or manual intervention, achieving automated splicing. The sidewalls of the splicing blocks 22 are in contact with each other, making the sidewalls mutually positioning surfaces, forming a complete circle with no gaps or minimal uniform gaps, ensuring the high precision requirements of the splicing process. The pushing mechanism 24 is preferably a structure capable of simultaneously driving all splicing blocks 22, requiring only the force to overcome the resultant force of the springs to achieve rapid and synchronous separation and reset, preparing for the next loading, resulting in a simple and efficient structure. In this embodiment, the splicing assembly 2 utilizes a purely mechanical structure to achieve high-precision, high-consistency, high-reliability, and high-efficiency automated splicing operations. This not only simplifies the equipment and reduces costs, but also ensures high-quality welding of the entire stator 7. Its modular design allows for easy replacement of the splice blocks 22, thus adapting to different stator 7 specifications and providing excellent production flexibility.

[0029] like Figure 4 As shown, in this embodiment, the press-fitting assembly 3 is used to press and fix the completed stator 7 into a cylindrical fixture 8; the cylindrical fixture 8 has a plurality of strip-shaped through holes 81 on its side wall, the positions of the strip-shaped through holes 81 corresponding to the joint positions between the stator 7 blocks, and is used to expose the joints to be welded.

[0030] The press-fitting component 3, through hydraulic or pneumatic pressure, precisely presses and fixes the complete circular stator 7 formed by the piecing component 2 into the cavity of the cylindrical fixture 8. The cylindrical fixture 8 has a chamfered structure at its end for precise positioning of the stator 7, allowing the stator 7 to be vertically and completely embedded in the cylindrical fixture 8. The cylindrical fixture 8, through its internal cavity shape, provides omnidirectional constraint on the stator 7, eliminating degrees of freedom and achieving precise positioning and fixation. The number of strip-shaped through holes 81 in the cylindrical fixture 8 is equal to the number of welds between the stator 7 pieces, and the width of the strip-shaped through holes 81 must meet welding requirements to ensure unobstructed laser transmission. In this embodiment, the cylindrical fixture 8 is not only a clamping tool but also serves as a light path guide and thermodynamic stabilizer for the laser welding process.

[0031] The welding assembly 4 includes multiple laser welders 41, which are used to emit laser beams that pass through strip-shaped through holes 81 on the side wall of the cylindrical fixture 8 and weld the joints.

[0032] The number of laser welders 41 can be determined according to the number of seams to be welded on the stator 7. The welding assembly 4 can be equipped with components that can drive the cylindrical fixture 8 to rotate. The laser welders 41 are evenly distributed around the stator 7, and all seams are welded exactly when the stator 7 rotates one revolution. By using multiple laser welders 41, this embodiment achieves a leapfrog upgrade of laser welding from "single-seam sequence operation" to "full-circumference synchronous manufacturing", which greatly improves welding efficiency and welding stability of the stator 7.

[0033] The demolding assembly 5 is used to fix the cylindrical fixture 8 and push the welded stator 7 to detach from the cylindrical fixture 8.

[0034] The demolding assembly 5 may include a fixing part for fixing the cylindrical fixture 8 and a pushing part for pushing the stator 7, thereby achieving automated and high-quality demolding.

[0035] The stator assembly and rounding welding machine provided in this embodiment automates the handling, rounding, pressing, welding and demolding operations of the stator 7 through the assembly assembly 2, pressing assembly 3, welding assembly 4, demolding assembly 5 and handling device 6. This embodiment has a high level of automation and intelligence, and can effectively improve the processing quality and efficiency of the stator 7.

[0036] like Figure 5 As shown, in this embodiment, the splicing assembly 2 also includes a drive cylinder 25 fixedly installed at the bottom of the splicing turntable 21. The splicing turntable 21 is provided with a central through hole. The pushing mechanism 24 includes a lifting electric cylinder and a lifting shaft 241. The lifting electric cylinder is used to drive the lifting shaft 241 to move up and down in the vertical direction. The lifting shaft 241 passes through the central through hole coaxially through a bearing assembly and forms a sliding fit with the splicing turntable 21. The top of the lifting shaft 241 is provided with a tapered chamfer 242, and the end of the splicing block 22 facing the center of the circle is provided with a sloped structure 222. When the lifting electric cylinder drives the lifting shaft 241 to move upward, the tapered chamfer 242 contacts the sloped structure 222 and pushes the splicing block 22 radially outward, so that the splicing blocks 22 all move along the guide rail to the side wall of the splicing block 22 and separate from each other.

[0037] In this assembly, the splicing component 2 separates the individual splicing blocks 22 via a pushing mechanism 24 before loading, facilitating the loading operation. A drive cylinder 25 then drives each splicing block 22 to rotate sequentially to the loading station, reducing system complexity and improving loading efficiency. The tapered chamfer 242 can be 30-45 degrees, working in conjunction with the inclined surface structure 222 to convert vertical motion into radial motion of the splicing blocks 22 and reduce friction. The diameter of the opening shaft 241 and the distance between the end of the splicing block 22 and the center of the circle can be set according to the preset radial movement distance of the splicing block 22, ensuring that the spacing between the splicing blocks 22 after being opened facilitates loading by the stator 7. The bearing assembly can include angular contact bearings and linear bearings to improve the motion stability of the opening shaft 241.

[0038] In this embodiment, a magnet mounting hole is provided on the side of the mounting groove 221 away from the center, and a magnet is installed in the magnet mounting hole.

[0039] The magnet is used to temporarily hold a single stator 7, bringing it into contact with the side of the mounting groove 221 near the circumference, preventing the stator 7 from shifting or falling off during movement. After installing the magnet, a larger gap can be set between the mounting groove 221 and the stator 7, reducing frictional damage between the stator 7 and the mounting groove 221 during loading and unloading.

[0040] like Figure 6 As shown, in this embodiment, the cylindrical fixture 8 includes a cylindrical body and an annular positioning flange, and the annular positioning flange is provided with a positioning hole; the pressing assembly 3 includes a positioning plate 31, and a push hole 32 is opened in the middle of the positioning plate 31. A downward pressing electric cylinder 33 is installed on the upper end of the push hole 32 through a bracket, and a cylindrical pressing head 34 is installed downward on the moving end of the downward pressing electric cylinder; a push cylinder 35 is installed on the lower end of the push hole 32 through a bracket, and a cylindrical push rod 36 is installed upward on the moving end of the push cylinder; a positioning pin that cooperates with the positioning hole is provided around the push hole 32, and a pneumatic pressure rod 37 for pressing the annular positioning flange is provided.

[0041] The positioning plate 31 and positioning pin can cooperate with the cylindrical fixture 8 to prevent the cylindrical fixture 8 from rotating and ensure that the strip-shaped through holes 81 on the cylindrical fixture 8 correspond one-to-one with the joints to be welded on the stator 7. Pneumatic pressure rods 37 are preferably respectively set on both sides of the cylindrical fixture 8 to improve the stability of the cylindrical fixture 8 during the pressing process. The double locking of the positioning pins and pneumatic pressure rods 37 can improve the verticality of the pressing of the cylindrical fixture 8 and prevent the stator 7 from being pressed off-center. The size of the cylindrical pressure head 34 needs to be set according to the stator 7 so that the cylindrical pressure head 34 can fit into the outer circle of the completed stator 7, applying pressure evenly to the iron core of the stator 7 and improving the pressing quality. The lowering electric cylinder 33 can work in conjunction with the pushing electric cylinder 35 to make the cylindrical pressure head 34 and the cylindrical push rod 36 contact the upper and lower ends of the stator 7 respectively, ensuring that the stator 7 is subjected to uniform force during the pressing process and improving the pressing quality.

[0042] In this embodiment, the demolding component 5 has the same structure as the pressing component 3, and is arranged side by side with the pressing component 3 and the welding component 4.

[0043] The position of the push hole 32 can be set according to the cylindrical fixture 8, so that the cylindrical push rod 36 can pass through the push hole 32 and abut against the iron core part of the stator 7. The demolding assembly 5 is arranged side by side with the pressing assembly 3 and the welding assembly 4, which facilitates handling.

[0044] like Figure 7 As shown, in this embodiment, the welding assembly 4 includes a welding turntable 42 and three laser welders 41 arranged around the welding turntable 42, with the three laser welders 41 having the same included angle.

[0045] The welding turntable 42, driven by a servo motor, rotates precisely in indexes to support the cylindrical fixture 8 and its internal stator 7. The welding turntable 42 calculates the rotation angle per rotation based on the number of seams in the stator 7, which is an integer multiple of three. Three laser welders 41 are evenly distributed at 120° intervals. Each time the welding turntable 42 pauses, all three lasers emit lasers simultaneously for parallel operation, completing the welding of all three seams in one operation, thus improving welding efficiency. Compared to welding adjacent seams sequentially, this embodiment simultaneously welds seams spaced 120° apart, optimizing the internal stress of the stator 7 and improving its quality.

[0046] In this embodiment, a weld seam detector 43 is also included, which is disposed between any two laser welders 41.

[0047] By placing the weld detector 43 between the two laser welders 41, one-third of the weld inspection can be completed during the welding process, thus improving the inspection efficiency.

[0048] like Figure 8As shown, in this embodiment, the conveying device 6 includes a loading and conveying assembly 61 for conveying a single stator 7 to the round assembly 2. The loading and conveying assembly 61 includes a three-axis moving mechanism 611. The moving end of the three-axis moving mechanism 611 is vertically mounted with an mounting plate 612. The mounting plate 612 is equipped with several independent up-and-down moving cylinders 613 arranged side by side. The moving end of each up-and-down moving cylinder 613 is connected to a stator gripper 614.

[0049] In this embodiment, a single stator 7 is preferably placed in a material tray and transported to the gripping position of the loading and conveying assembly 61 via a belt conveyor. The loading and conveying assembly 61 includes multiple stator grippers 614 capable of independent up-and-down movement, enabling the gripping of multiple stators 7 from the material tray at once, and then sequentially and precisely embedding each stator 7 into its corresponding mounting slot 221, thereby improving loading efficiency. The stator grippers 614, together with a cylinder controlling their opening and closing, are mounted on a mounting plate 612 via a slider, and their overall up-and-down movement is controlled by a vertical cylinder 613.

[0050] like Figure 9 As shown, in this embodiment, the conveying device 6 further includes a round conveying assembly 62 for conveying the assembled stator 7 as a whole to the pressing assembly 3; the round conveying assembly 62 includes a round turntable 621, a linear motion mechanism 622 fixedly installed on the round turntable 621, and a slide plate 623 that reciprocates in the horizontal direction at the moving end of the linear motion mechanism 622; a pair of long-arm grippers 624 are installed on the slide plate 623, the gripping end of the long-arm grippers 624 extends out of one end of the slide plate 623, and the gripping end has a semi-circular notch. When the two long-arm grippers 624 are closed, the circular notch fits and clamps the outer circumference of the assembled stator 7; a pneumatic control mechanism 625 for controlling the opening and closing action of the long-arm grippers 624 is fixedly installed at the other end of the slide plate 623.

[0051] The circular transport assembly 62 can not only transport the assembled stator 7, but also provide support for the stator 7 before pressing through the cantilevered slide plate 623, maintaining the integrity of the stator 7's shape after assembly, thereby improving the pressing quality and simplifying the structure of the pressing assembly 3. The pneumatic control mechanism 626 includes a cylinder and a cylinder-driven slider linkage mechanism, wherein the linkage is connected to the long-arm gripper 624, thereby controlling the long-arm gripper 624 to achieve opening and closing movements.

[0052] In this embodiment, the conveying device 6 further includes a two-axis conveying assembly and a conveying and unloading assembly. The two-axis conveying assembly is used to convey the cylindrical fixture 8 with the stator 7 pressed on it in sequence through the pressing assembly 3, the welding assembly 4, and the demolding assembly 5. The conveying and unloading assembly is used to unload the stator 7 after demolding. A buffer bracket is also provided at the location of the pressing assembly 3, the welding assembly 4, and the demolding assembly 5. The buffer bracket is used to temporarily place the cylindrical fixture 8.

[0053] The two-axis conveying assembly includes two moving shafts and a chuck capable of clamping the cylindrical fixture 8. The pressing assembly 3, welding assembly 4, and demolding assembly 5 are arranged along the movement direction of one of the moving shafts of the two-axis conveying assembly. The conveying and unloading assembly can be any conveying mechanism capable of transporting the demolded stator 7 to the unloading conveyor belt. Preferably, the conveying and unloading assembly may include a moving shaft and a rotating shaft to facilitate clamping the stator 7 out of the demolding assembly 5 and turning it to place it on the unloading conveyor belt. The buffer support may include a support plate, and a positioning pin 313 that cooperates with the cylindrical fixture 8 is provided on the support plate to ensure the angular positioning accuracy of the cylindrical fixture 8.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A stator block welding machine, characterized in that, It includes a workbench (1), a rounding assembly (2), a pressing assembly (3), a welding assembly (4), a demolding assembly (5), and a conveying device (6) disposed on the workbench (1); The splicing assembly (2) includes a splicing turntable (21) and several splicing blocks (22) radially mounted on the splicing turntable (21) via guide rails; each splicing block (22) has a mounting groove (221) at its front end for placing a single stator (7), and a radial spring (23) is provided between its rear end and the splicing turntable (21); when the splicing block (22) moves radially inward along the guide rail under the action of the radial spring (23) until the side walls of the splicing block (22) are in contact with each other, the stator (7) in the mounting groove (221) completes the splicing; a pushing mechanism (24) is provided at the bottom of the splicing turntable (21) to overcome the force of the radial spring (23) and drive the splicing block (22) to move radially outward along the guide rail and separate from each other; The pressing assembly (3) is used to press and fix the completed stator (7) into a cylindrical fixture (8); the cylindrical fixture (8) has multiple strip-shaped through holes (81) on its side wall, the position of the strip-shaped through holes (81) corresponding to the joint position between the stators (7), and is used to expose the joint to be welded; The welding assembly (4) includes a plurality of laser welders (41) for emitting laser beams that pass through strip-shaped through holes (81) on the sidewall of the cylindrical fixture (8) and weld the joint. The demolding assembly (5) is used to fix the cylindrical fixture (8) and push the stator (7) that has been welded to detach from the cylindrical fixture (8).

2. The modular stator round welding machine according to claim 1, characterized in that, The assembly (2) further includes a drive cylinder (25) fixedly installed at the bottom of the splicing turntable (21), and the splicing turntable (21) is provided with a central through hole; the pushing mechanism (24) includes a lifting electric cylinder and a lifting shaft (241), the lifting electric cylinder is used to drive the lifting shaft (241) to move up and down in the vertical direction, the lifting shaft (241) passes through the central through hole coaxially through a bearing assembly, and forms a sliding fit with the splicing turntable (21). The top of the top opening shaft (241) is provided with a tapered chamfer (242), and the end of the splicing block (22) facing the center is provided with a slope structure (222). When the lifting electric cylinder drives the top opening shaft (241) to move upward, the tapered chamfer (242) contacts the slope structure (222) and pushes the splicing block (22) radially outward, so that the splicing blocks (22) all move along the guide rail to the side wall of the splicing block (22) and separate from each other.

3. The modular stator round welding machine according to claim 2, characterized in that, The mounting groove (221) has a magnet mounting hole on its side away from the center, and a magnet is installed in the magnet mounting hole.

4. The modular stator round welding machine according to claim 1, characterized in that, The cylindrical fixture (8) includes a cylindrical body and an annular positioning flange, and the annular positioning flange is provided with a positioning hole; the pressing assembly (3) includes a positioning plate (31), and a push hole (32) is opened in the middle of the positioning plate (31). A lowering electric cylinder (33) is installed on the upper end of the push hole (32) through a bracket. A cylindrical pressure head (34) is installed downward on the moving end of the lowering electric cylinder; a pushing electric cylinder (35) is installed on the lower end of the push hole (32) through the bracket. A cylindrical push rod (36) is installed upward on the moving end of the pushing electric cylinder (35); a positioning pin that cooperates with the positioning hole is provided around the push hole (32), and a pneumatic pressure rod (37) for pressing the annular positioning flange is provided.

5. The modular stator round welding machine according to claim 4, characterized in that, The demolding component (5) has the same structure as the pressing component (3) and is arranged side by side with the pressing component (3) and the welding component (4).

6. The modular stator full-circle welding machine according to claim 1, characterized in that, The welding assembly (4) includes a welding turntable (42) and three laser welders (41) arranged around the welding turntable (42), with the three laser welders (41) having the same included angle.

7. The modular stator round welding machine according to claim 6, characterized in that, It also includes a weld detector (43), which is positioned between any two of the laser welders (41).

8. The modular stator round welding machine according to claim 1, characterized in that, The conveying device (6) includes a loading and conveying assembly (61) for conveying a single stator (7) to the round assembly (2). The loading and conveying assembly (61) includes a three-axis moving mechanism (611). The moving end of the three-axis moving mechanism (611) is vertically mounted with an mounting plate (612). The mounting plate (612) is equipped with several independent up-and-down moving cylinders (613) arranged side by side. The moving end of each up-and-down moving cylinder (613) is connected to a stator gripper (614).

9. The modular stator round welding machine according to claim 8, characterized in that, The transport device (6) further includes a round transport assembly (62) for transporting the assembled stator (7) to the press assembly (3) as a whole; the round transport assembly (62) includes a round turntable (621), a linear moving mechanism (622) fixedly installed on the round turntable (621), and a slide plate (623) that reciprocates in the horizontal direction is provided at the moving end of the linear moving mechanism (622); a pair of long-arm grippers (624) are installed on the slide plate (623), the gripping end of the long-arm grippers (624) extends out of one end of the slide plate (623), and the gripping end has a semi-circular notch. When the two long-arm grippers (624) close, the circular notch fits and clamps the outer circumference of the stator (7); a pneumatic control mechanism (625) for controlling the opening and closing action of the long-arm grippers (624) is fixedly installed at the other end of the slide plate (623).

10. The modular stator round welding machine according to claim 8, characterized in that, The conveying device (6) further includes a two-axis conveying assembly and a conveying and unloading assembly. The two-axis conveying assembly is used to convey the cylindrical fixture (8) with the stator (7) pressed on it in sequence to the pressing assembly (3), the welding assembly (4) and the demolding assembly (5). The conveying and unloading assembly is used to unload the stator (7) after demolding. A buffer bracket is also provided at the location of the pressing assembly (3), the welding assembly (4) and the demolding assembly (5). The buffer bracket is used to temporarily place the cylindrical fixture (8).

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