Metal sheet continuous welding unit for on-line stamping and welding production line of miniature circuit breaker

Abstract

The invention relates to the technical field of electrical element production equipment, and discloses a metal sheet continuous welding unit for a miniature circuit breaker online stamping and welding production line, which comprises a first workbench and a conveying track, and further comprises a first turntable and a first clamp which are arranged above the first workbench, the bimetallic strip feeding disc, the first copper litzendraht wire welding unit, the wire inlet piece feeding disc, the first welding station and the second welding station are sequentially arranged around the first rotating disc, and the first mechanical arm, the second mechanical arm, the third mechanical arm and the fourth mechanical arm are arranged on different stations. Bimetal sheet feeding, copper litzendraht wire fixed-length cutting and laser welding, wire inlet sheet assembling and secondary welding are integrated through rotating disc type multi-station layout, and material stacking prevention of a material staggering mechanism, self-adaptive positioning of an elastic clamp, wedge-shaped and roller transmission precise pressing and contact type and visual type closed-loop quality control are combined. And high-beat, high-precision and full-automatic integrated manufacturing of the core semi-finished product of the thermal assembly is realized.

Description

Technical Field

[0001] This invention relates to the field of electrical component manufacturing equipment technology, specifically a continuous metal sheet welding unit for an online stamping and welding production line for miniature circuit breakers. Background Technology

[0002] Miniature circuit breakers are indispensable protection and control components in low-voltage power distribution systems. Their core function is to quickly disconnect the circuit when an overload or short-circuit fault occurs, thereby ensuring the safety of equipment and personnel. Among them, the thermal assembly, as the key actuator for overload protection, directly determines the circuit breaker's operating characteristics, response consistency, and long-term operational reliability through its structural precision and assembly quality.

[0003] A typical miniature circuit breaker thermal assembly usually consists of multiple precision metal parts, such as bimetallic strips, moving contacts, moving contact supports, lead plates, copper braided wires, and riveting bases. These parts need to go through more than ten processes, including stamping, precision bending, multi-point riveting, multi-pass welding, hot melt shaping, and final assembly, to form an integrated module with complete electrical, thermal, and mechanical linkage functions.

[0004] In existing manufacturing processes, most companies still use single-machine welding equipment in conjunction with manual loading and unloading, which is not only inefficient, but also prone to welding position deviation, incomplete welding or over-welding due to differences in operation, which seriously affects product consistency.

[0005] Therefore, there is an urgent need for a continuous metal sheet welding unit for an online stamping and welding production line for miniature circuit breakers, in order to achieve full automation, continuity and intelligence of the core welding process of thermal components. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a continuous metal sheet welding unit for an online stamping and welding production line for miniature circuit breakers.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A continuous metal sheet welding unit for an online stamping and welding production line of miniature circuit breakers includes a first workbench and a conveyor rail. It also includes a turntable 1 positioned above the first workbench, on which clamps 1 are installed at intervals. Around the turntable 1, a bimetallic sheet feeding tray, a copper braided wire welding unit 1, a wire feeder tray, a welding station 1, and a welding station 2 are sequentially arranged on the first workbench. The unit also includes a first robotic arm corresponding to the bimetallic sheet feeding tray and the turntable 1, a second robotic arm and a third robotic arm corresponding to the wire feeder tray and the turntable 1, and a fourth robotic arm corresponding to the welding station 2 and the turntable 1. A coil feeder is provided on one side of the copper braided wire welding unit 1, from which the copper braided wire is continuously fed. Upon passing through the copper braided wire welding unit 1, the wire is cut to a fixed length and welded to the bimetallic sheet fed from the preceding station.

[0008] To achieve continuous and automated welding of the thermal components of miniature circuit breakers, preferably, the conveyor rail is set on the first workbench, located on one side of the turntable, and the welding station is located on the extension path of the conveyor rail, used to receive the base components conveyed by the conveyor rail, and to work in cooperation with the turntable.

[0009] In order to complete the multi-stage operation of initial assembly, relocation and assembly with the inlet plate of the bimetallic strip on a single fixture, preferably, the fixture includes a plate body, on which a first clamping area, a second clamping area and a placement groove are provided, and a limit block is installed on the plate body on one side of the first clamping area and the second clamping area by means of an elastic element.

[0010] To prevent the bimetallic sheets from stacking during automatic feeding, which could lead to gripping failure or assembly misalignment, preferably, a misalignment mechanism is provided on the first worktable below the first robot arm. The misalignment mechanism includes a misalignment stand, on which a bimetallic transition seat is slidably mounted. A bimetallic positioning plate and a limiting seat are fixedly mounted on the bimetallic transition seat. A cylinder is also mounted on the misalignment stand, and the output end of the cylinder is fixedly connected to the bimetallic transition seat.

[0011] To achieve stable feeding and precise positioning of the copper braided wire, preferably, the copper braided wire welding unit includes an overall support frame and a feeding mechanism driven by a cylinder, which is slidably mounted on the overall support frame. The feeding mechanism includes a feeding seat and a cylinder mounted on the feeding seat. The output end of the cylinder is equipped with a clamping plate. A conveying frame is mounted on the feeding seat. The conveying frame has a braided wire groove corresponding to the clamping plate to guide the copper braided wire to move along a predetermined path.

[0012] To improve the straightness of the copper braided wire before welding and prevent it from unraveling, a second feeding seat and a fourth cylinder mounted on the second feeding seat are provided on one side of the feeding mechanism. These are used to work with the first feeding seat to transport and straighten the copper braided wire. A pressure plate is fixedly installed at the output end of the fourth cylinder. The second feeding seat is also provided with a braided wire groove. Furthermore, a hot melt clamp that can be brought close to each other is provided on the overall support between the first and second feeding seats for hot melting the copper braided wire.

[0013] To achieve high-precision fixed-length cutting of copper braided wire and ensure synchronous and reliable cutting operations, a fixed-length cutting module is further provided on the side of the overall support near the turntable. The fixed-length cutting module includes an upper cutter and a lower cutter, which can move relative to each other. The fixed-length cutting module also includes a cover, inside which an L-shaped swing rod is rotatably installed. The two ends of the swing rod are respectively hinged to a first push rod and a second push rod. The first push rod and the second push rod are spatially perpendicular to each other, and both the first push rod and the second push rod are slidably connected inside the cover. The second push rod has a wedge-shaped part, and the upper cutter is sleeved on the wedge-shaped part of the second push rod. A cylinder nine is fixedly installed on the overall support, and a connecting block is fixedly installed on the output end of the cylinder nine. The lower cutter and the first push rod are both fixedly installed on the connecting block.

[0014] To precisely control the cutting stroke and achieve post-cutting reset buffering, a limit block four is fixedly installed on the overall bracket, distance sensors are installed on both sides of the connecting block, and a cylinder zero is fixedly installed on the overall bracket, with the movable end of the cylinder zero fixed to the connecting block.

[0015] To further ensure both uniform clamping force and adaptability to workpiece height tolerances during welding, a laser welding module is further provided on the side of the overall support near the turntable. The laser welding module includes an upper welding section and a lower welding section respectively located on both sides of the fixture. The upper welding section includes a cylinder eleven and an upper welding head, which is clamped and installed in an upper connecting seat. The upper connecting seat is elastically connected to the output end of the cylinder eleven. The lower welding section includes a cylinder twelfth and a lower welding head, which is clamped and installed in a lower connecting seat. A roller is mounted on the lower connecting seat. A slide rail two is fixedly mounted on the overall support. A wedge-shaped pad is slidably connected in the slide rail two. The output end of the cylinder twelfth is fixed to the wedge-shaped pad, and the roller one slides in contact with the surface of the wedge-shaped pad.

[0016] In order to achieve real-time monitoring of welding quality and automatic interception of defective products, preferably, an inspection camera is installed downstream of the welding station to perform online visual inspection of the welding point quality.

[0017] The beneficial effects of this invention are: By integrating bimetallic sheet feeding, copper braided wire length cutting and laser welding, wire feed assembly and secondary welding through a rotary multi-station layout, and combining it with a misalignment mechanism to prevent stacking, elastic clamp self-adaptive positioning, wedge and roller drive precision pressing, and contact and vision closed-loop quality control, the system achieves high-speed, high-precision, fully automated integrated manufacturing of core semi-finished products for thermal components. This effectively solves the technical problems of dispersed processes, excessive manual intervention, poor welding consistency, and easy deviation of copper braided wires in traditional processes, significantly improving production efficiency and product yield, and providing a reliable technical path for the intelligent manufacturing of relay thermal components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the multi-station continuous welding unit of the present invention; Figure 2 This is a schematic diagram of the fixture structure of the present invention; Figure 3 This is a schematic diagram of the copper braid welding unit structure of the present invention; Figure 4 This is a schematic diagram of the feeding mechanism in the copper braid welding unit of the present invention; Figure 5 This is a schematic diagram of the fixed-length cutting module structure in the copper braid welding unit of the present invention; Figure 6 This is a schematic diagram of the laser welding module structure in the copper braid welding unit of the present invention; Figure 7 This is a schematic diagram of the feeding mechanism of the present invention; Figure 8 This is a schematic diagram of the detection device of the present invention; Figure 9 This invention relates to the visual testing requirements of a detection camera. Figure 10 This is a schematic diagram of the finished product structure of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 200. Conveying track; 310. First workbench; 320. Turntable 1; 321. Fixture 1; 3211. Plate 1; 3212. First clamping area; 3213. Second clamping area; 3214. Placement slot; 3215. Limiting block 1; 330. Bimetallic sheet feeding tray; 340. Copper braided wire welding unit 1; 341. Overall support; 342. Laser welding module; 3421. Cylinder 11; 3422. Upper welding head; 3423. Upper connecting seat; 34 24. Cylinder Twelve; 3425. Lower Welding Head; 3426. Lower Connecting Seat; 3427. Roller One; 3428. Slide Rail Two; 3429. Wedge-shaped Pad; 343. Feeding Mechanism; 3431. Feeding Seat One; 3432. Cylinder Three; 3433. Clamping Plate; 3434. Conveyor Frame; 3435. Braided Trough; 3436. Feeding Seat Two; 3437. Cylinder Four; 3438. Pressure Plate; 344. Cylinder Two; 345. Fixed Length Cutting Tool Cutting module; 3451, Upper cutter; 3452, Lower cutter; 3453, Cover; 3454, Swing rod; 3455, First push rod; 3456, Second push rod; 3457, Cylinder 9; 3458, Connecting block; 3459, Distance sensor; 346, Hot melt clamp; 350, Infeed plate feed tray; 360, Welding station 1; 370, Welding station 2; 380, Material handling mechanism; 381, Material handling upright plate; 382, ​​Double metal plate 383. Crossing seat; 384. Double gold positioning plate; 385. Limiting seat; 390. Cylinder 1; 301. Detection camera 1; 302. First robotic arm; 303. Second robotic arm; 304. Third robotic arm; 305. Fourth robotic arm; 305. Detection device 1; 3051. Detection frame; 3052. Cylinder 5; 3053. Detection plate; 3054. Infrared sensor; 3055. Elastic probe; 306. Limiting block 4; 307. Cylinder zero. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Example

[0022] like Figure 1 - Figure 10 As shown, this invention relates to a continuous metal sheet welding unit for an online stamping and welding production line for miniature circuit breakers. It is used for multi-stage automated welding of a bimetallic bracket and an integrated structure of bimetallic bracket auxiliary materials output from the previous process, ultimately forming an integrated semi-finished product containing bimetallic sheets, copper braided wires, and feed plates. Specifically, it includes a conveyor track 200, a first workbench 310, a turntable 320, a bimetallic sheet feeding tray 330, a copper braided wire welding unit 340, a feed plate feeding tray 350, a welding station 360, and a welding station 370.

[0023] Turntable 320 has a circular structure and is driven by a servo motor. It can rotate intermittently. Clamps 321 are installed at equal angles along the circumference of turntable 320 to stably hold semi-finished products at different stages.

[0024] The bimetallic sheet feeding tray 330, copper braided wire welding unit 340, wire feed tray 350, welding station 360, and welding station 370 are sequentially arranged around the turntable 320 on the first worktable 310. In addition, it also includes a first robot 301 between the bimetallic sheet feeding tray 330 and the turntable 320, a second robot 302 and a third robot 303 between the wire feed tray 350 and the turntable 320, and a fourth robot 304 between the welding station 370 and the turntable 320. In particular, a coil feeder body is provided on one side of the copper braided wire welding unit 340. The copper braided wire is continuously fed by the coil feeder body, and is cut to a fixed length when passing through the copper braided wire welding unit 340 and welded to the bimetallic sheet fed in by the previous station.

[0025] The bimetallic strip is fed by the bimetallic strip feeder 330, automatically sorted and conveyed to the picking position, where it is picked up by the first robot arm 301 and placed in the fixture 321 that rotates with the turntable 320 to the position. The copper braided wire is continuously released from the coil feeder body, enters the position through tension control and guide wheels. When the fixture 321 rotates with the turntable 320 to the copper braided wire welding unit 340, the copper braided wire is fed to the top of the bimetallic strip according to the preset length, welded and fixed to the bimetallic strip, and then cut, forming a reliable electrical connection. After the copper braided wire welding is completed... Turntable 320 continues to rotate, causing clamp 321 to enter the feed plate 350 station. The feed plates are automatically fed by the feed plate 350, sorted, and then picked up by the second robot 302 and placed in clamp 321, which rotates with turntable 320 to this station. The third robot 303 is located downstream of the feed plate 350 and is used to transport the bimetallic strip in clamp 321 to one side of the feed plate. Clamp 321 enters welding station 360, where welding head is used to complete the welding and fixing between the feed plate and the copper braid.

[0026] In an exemplary embodiment, to ensure that the bimetallic strip is correctly placed in the fixture 321, an identification sensor is installed on the worktable below the fixture 321 to detect the installation position and installation direction of the bimetallic strip in real time.

[0027] Specifically, the conveyor track 200 is set on the first worktable 310, located on one side of the turntable 320, and the welding station 370 is located on the extension path of the conveyor track 200, used to receive the base components conveyed by the conveyor track 200 and work in conjunction with the turntable 320.

[0028] Reference Figure 2 The fixture 321 includes a plate 3211, on which a first clamping area 3212, a second clamping area 3213, and a placement groove 3214 are provided. The first clamping area 3212 is used to place the bimetallic strip, and the placement groove 3214 is used to assemble the wire feed piece. After the welding between the bimetallic strip and the copper braided wire is completed, the wire feed piece is picked up by the third robot 303 and placed into the second clamping area 3213. At this time, the copper braided wire is located above the wire feed piece, which facilitates subsequent welding.

[0029] A limit block 3215 is installed on the plate 3211 on one side of the first clamping area 3212 and the second clamping area 3213 by means of an elastic element to fix the position of the bimetallic strip. The elastic element is preferably a spring.

[0030] To prevent stacking of bimetallic sheets during feeding, refer to... Figure 7A material shifting mechanism 380 is also provided on the first worktable 310 below the first robot arm 301. Specifically, the material shifting mechanism 380 includes a material shifting plate 381, on which a double metal transition seat 382 is slidably installed. A double metal positioning plate 383 and a limit seat 384 are fixedly installed on the double metal transition seat 382. A cylinder 385 is also installed on the material shifting plate 381, and the output end of the cylinder 385 is fixedly connected to the double metal transition seat 382.

[0031] The limiting seat 384 faces the first robot arm 301 and is used to stop and position the front end of the bimetallic strip. The cylinder 385 drives the bimetallic transition seat 382 to slide left and right on the material handling plate 381, so that the first robot arm 301 can sequentially grab and load the material.

[0032] Reference Figures 3-8 In this embodiment, the copper braid welding unit 340 is an integrated automated workstation used to realize continuous feeding, fixed-length cutting, and welding of copper braided wire to bimetallic strips. It includes an overall support frame 341 and further comprises: The feeding mechanism 343, driven by cylinder 2 344, is slidably mounted on the overall bracket 341. It includes a feeding seat 1 3431 and a cylinder 3 3432 mounted on the feeding seat 1 3431. A clamping plate 3433 is installed at the output end of the cylinder 3 3432. A conveyor frame 3434 is installed on the feeding seat 1 3431. The conveyor frame 3434 has a braided wire groove 3435 corresponding to the clamping plate 3433 to guide the copper braided wire to move along a predetermined path.

[0033] Furthermore, a second feeding seat 3436 and a fourth cylinder 3437 mounted on the second feeding seat 3436 are provided on one side of the feeding mechanism 3433. These are used to work together with the first feeding seat 3431 to complete the feeding and straightening of the copper braided wire. A pressure plate 3438 is fixedly installed at the output end of the fourth cylinder 3437. During feeding, appropriate pressure is applied to the copper braided wire to keep it straight before entering the welding area. The second feeding seat 3436 is also provided with a braided wire groove 3435, so that the copper braided wire can be straightened during feeding. A hot melt clamp 346 that can be brought close to each other is provided on the overall support 341 between the first feeding seat 3431 and the second feeding seat 3436 for hot melt treatment of the copper braided wire to prevent it from scattering.

[0034] A fixed-length cutting module 345 and a laser welding module 342 are provided on the side of the overall support 341 near the turntable 320 and are located at the end of the feeding path. The fixed-length cutting module 345 includes an upper cutter 3451 and a lower cutter 3452, wherein the upper cutter 3451 and the lower cutter 3452 can move relative to each other.

[0035] Specifically, refer to Figure 5The fixed-length cutting module 345 also includes a cover 3453. An L-shaped swing rod 3454 is rotatably installed inside the cover 3453. A first push rod 3455 and a second push rod 3456 are respectively hinged to both ends of the swing rod 3454. The first push rod 3455 and the second push rod 3456 are perpendicular to each other in spatial arrangement, and both the first push rod 3455 and the second push rod 3456 are slidably connected inside the cover 3453. In particular, the second push rod 3456 has a wedge-shaped part. The upper cutter 3451 is sleeved on the wedge-shaped part of the second push rod 3456. A cylinder 3457 is fixedly installed on the overall bracket 341. A connecting block 3458 is fixedly installed at the output end of the cylinder 3457. The lower cutter 3452 and the first push rod 3455 are both fixedly installed on the connecting block 3458.

[0036] The cylinder 3457 pushes the lower cutter 3452 and the first push rod 3455 to rise. The first push rod 3455 drives the L-shaped swing rod 3454 to rotate, pulling the second push rod 3456 to one side. The wedge-shaped part on the second push rod 3456 pulls the upper cutter 3451 down, thereby completing the cutting action.

[0037] Furthermore, a limit block 306 is fixedly installed on the overall bracket 341, a distance sensor 3459 is installed on both sides of the connecting block 3458, and a cylinder 307 is fixedly installed on the overall bracket 341, with the movable end of the cylinder 307 fixed to the connecting block 3458.

[0038] Reference Figure 6 The laser welding module 342 includes an upper welding part and a lower welding part respectively disposed on both sides of the fixture 321. The upper welding part includes a cylinder 11 3421 and an upper welding head 3422. The upper welding head 3422 is clamped and installed in the upper connecting seat 3423. The upper connecting seat 3423 is elastically connected to the output end of the cylinder 11 3421. The lower welding part includes a cylinder 12 3424 and a lower welding head 3425. The lower welding head 3425 is clamped and installed in the lower connecting seat 3426. In particular, a roller 1 3427 is installed on the lower connecting seat 3426. A slide rail 2 3428 is fixedly installed on the overall bracket 341. A wedge-shaped pad 3429 is slidably connected in the slide rail 2 3428. The output end of the cylinder 12 3424 is fixed to the wedge-shaped pad 3429. The roller 1 3427 slides in contact with the surface of the wedge-shaped pad 3429.

[0039] Fixture 321 rotates with turntable 320 to the laser welding station, where a bimetallic strip is already installed. The copper braided wire, placed above the welding point by the preceding cutting mechanism, is in a ready-to-weld state. Cylinder 3421 is activated, pushing the upper connecting seat 3423 downward. Since the upper connecting seat 3423 and the cylinder output end are elastically connected, like a spring buffer, the upper welding head 3422 first gently contacts the surface of the copper braided wire, applying a preload. The elastic structure can absorb workpiece height tolerances or slight warping of the copper braided wire, avoiding rigid impacts that could cause component displacement or welding head collision damage. Cylinder 12 3424 starts synchronously, pushing the wedge-shaped pad 3429 to move horizontally along slide rail 2 3428. Roller 1 3427 installed on the lower connecting seat 3426 always maintains rolling contact with the inclined surface of the wedge-shaped pad 3429. As the wedge-shaped pad 3429 moves horizontally, its inclined surface decomposes the horizontal thrust into a vertically upward component, pushing roller 1 3427 and the entire lower connecting seat 3426 to rise smoothly. The lower welding head 3425 moves upward accordingly, forming a clamping state with the upper welding head 3422, tightly welding the bimetallic strip to the copper braid wire.

[0040] After the bimetallic strip and copper braided wire are welded, the third robot 303 picks up the component from the first clamping area 3212 and transfers it to the second clamping area 3213 in the fixture 321 for positioning. At this time, the copper braided wire is located above the infeed piece, preparing for a reliable connection between the infeed piece and the copper braided wire in the subsequent welding station 360. Before entering the welding station 360, to further ensure the correctness of the assembly state, a detection device 305 is provided on the first worktable 310 between the third robot 303 and the welding station 360. This device is used to confirm the position and pre-inspect the contact status of the semi-finished product that has been transferred to the second clamping area 3213. Figure 8 Specifically, it includes a detection frame 3051 fixed on the first workbench 310, a cylinder 3052 mounted on the detection frame 3051, and a detection plate 3053 connected to the output end of the cylinder 3052. The detection plate 3053 integrates an infrared sensor 3054 and an elastic probe 3055.

[0041] During operation, when fixture 321 rotates with turntable 320 to the inspection station, cylinder 3052 drives inspection plate 3053 to move downward, causing elastic probe 3055 to lightly touch the surface of bimetallic plate. If the bimetallic plate is located within the second clamping area 3213, elastic probe 3055 will generate slight compression, and infrared sensor 3054 will receive a stable reflected signal. The system will determine it as "qualified". If it is missing, elastic probe 3055 will not respond, and the system will mark it as "abnormal".

[0042] Furthermore, an inspection camera 390 is installed downstream of welding station 360 for online visual inspection of the quality of the welding points.

[0043] Specifically, refer to Figure 9 The detection camera covers the welded area in fixture 321 with a field of view of 390. First, the outlines of the two sides of the copper braid are identified and their spatial direction in the image is extracted. At the same time, a set auxiliary line is called in the preset feed piece model, and the intersection point of the two sides of the copper braid with the set auxiliary line is calculated. The vertical distance from the vertex of the copper braid to the set auxiliary line is further determined and denoted as H. According to the process specification, this distance H must meet the preset tolerance range. If the measured value exceeds the threshold, it is judged that the copper braid is offset, raised, or not properly attached to the feed piece, which is a welding defect. If the H value is qualified, it is allowed to proceed to the next process.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous metal sheet welding unit for an online stamping and welding production line of miniature circuit breakers, comprising a first workbench (310) and a conveying track (200), characterized in that, It also includes a turntable (320) disposed above the first workbench (310), on which clamps (321) are installed at intervals, and The bimetallic sheet feeding tray (330), copper braided wire welding unit one (340), wire feed tray (350), welding station one (360) and welding station two (370) are arranged sequentially around the turntable one (320) on the first worktable (310). It also includes a first robot (301) corresponding to the bimetallic sheet feeding tray (330) and the turntable one (320), a second robot (302) and a third robot (303) corresponding to the wire feed tray (350) and the turntable one (320), and a fourth robot (304) corresponding to the welding station two (370) and the turntable one (320). The copper braid welding unit (340) is provided with a coil feeder on one side. The copper braid is continuously fed by the coil feeder. When it passes through the copper braid welding unit (340), it is cut to a fixed length and welded to the bimetallic sheet fed in by the previous station.

2. The continuous metal sheet welding unit for an online stamping and welding production line of a miniature circuit breaker according to claim 1, characterized in that: The conveying track (200) is set on the first workbench (310) and located on one side of the turntable (320). The welding station (370) is located on the extension path of the conveying track (200) and is used to receive the base components conveyed by the conveying track (200) and work together with the turntable (320).

3. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 1, characterized in that: The clamp (321) includes a plate (3211), on which a first clamping area (3212), a second clamping area (3213), and a placement groove (3214) are provided. A limit block (3215) is installed on the plate (3211) on one side of the first clamping area (3212) and the second clamping area (3213) by means of an elastic element.

4. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 1, characterized in that: The first worktable (310) below the first robot (301) is provided with a material shifting mechanism (380). The material shifting mechanism (380) includes a material shifting plate (381). A double metal transition seat (382) is slidably installed on the material shifting plate (381). A double metal positioning plate (383) and a limit seat (384) are fixedly installed on the double metal transition seat (382). A cylinder (385) is also installed on the material shifting plate (381). The output end of the cylinder (385) is fixedly connected to the double metal transition seat (382).

5. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 1, characterized in that: The copper braid welding unit (340) includes an overall support (341) and further includes: The feeding mechanism (343) is driven by cylinder two (344) and can be slidably mounted on the overall bracket (341). It includes a feeding seat one (3431) and a cylinder three (3432) mounted on the feeding seat one (3431). The output end of the cylinder three (3432) is equipped with a clamping plate (3433). The feeding seat one (3431) is equipped with a conveyor frame (3434). The conveyor frame (3434) has a braided wire groove (3435) corresponding to the clamping plate (3433) to guide the copper braided wire to move along a predetermined path.

6. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 5, characterized in that: The feeding mechanism (343) is provided with a second feeding seat (3436) and a fourth cylinder (3437) installed on the second feeding seat (3436) to cooperate with the first feeding seat (3431) to complete the feeding and straightening of the copper braided wire. The output end of the fourth cylinder (3437) is fixedly installed with a pressure plate (3438). The second feeding seat (3436) is also provided with a braided wire groove (3435). A hot melt clamp (346) that can be brought close to each other is provided on the overall bracket (341) between the first feeding seat (3431) and the second feeding seat (3436) for hot melting treatment of the copper braided wire.

7. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 5, characterized in that: The overall support (341) is provided with a fixed-length cutting module (345) on the side near the turntable (320). The fixed-length cutting module (345) includes an upper cutter (3451) and a lower cutter (3452), which are movable relative to each other. The fixed-length cutting module (345) includes a cover (3453), and an L-shaped swing rod (3454) is rotatably installed inside the cover (3453). The two ends of the swing rod (3454) are respectively hinged to a first push rod (3455) and a second push rod (3456). The first push rod (3455) The first push rod (3455) and the second push rod (3456) are arranged perpendicular to each other in space, and the first push rod (3455) and the second push rod (3456) are slidably connected in the cover (3453). The second push rod (3456) has a wedge-shaped part. The upper cutter (3451) is sleeved on the wedge-shaped part of the second push rod (3456). The cylinder nine (3457) is fixedly installed on the overall bracket (341). The output end of the cylinder nine (3457) is fixedly installed with a connecting block (3458). The lower cutter (3452) and the first push rod (3455) are both fixedly installed on the connecting block (3458).

8. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 7, characterized in that: Limiting block four (306) is fixedly installed on the overall bracket (341), distance sensors (3459) are installed on both sides of the connecting block (3458), cylinder zero (307) is fixedly installed on the overall bracket (341), and the movable end of cylinder zero (307) is fixed to the connecting block (3458).

9. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 5, characterized in that: A laser welding module (342) is provided on the side of the overall bracket (341) near the turntable (320). The laser welding module (342) includes an upper welding part and a lower welding part respectively provided on both sides of the fixture (321). The upper welding part includes cylinder eleven (3421) and an upper welding head (3422). The upper welding head (3422) is clamped and installed in the upper connecting seat (3423). The upper connecting seat (3423) is elastically connected to the output end of cylinder eleven (3421). The lower welding part includes cylinder twelve (3424). The cylinder 12 (3424) and the lower welding head (3425) are clamped and installed in the lower connecting seat (3426). The lower connecting seat (3426) is equipped with a roller (3427). The slide rail (3428) is fixedly installed on the overall bracket (341). The wedge-shaped pad (3429) is slidably connected in the slide rail (3428). The output end of the cylinder 12 (3424) is fixed to the wedge-shaped pad (3429). The roller (3427) slides in contact with the surface of the wedge-shaped pad (3429).

10. The continuous metal sheet welding unit for the online stamping and welding production line of miniature circuit breakers according to claim 1, characterized in that: A detection camera (390) is installed downstream of the welding station (360) for online visual inspection of the quality of the welding points.

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