Rectangular frame corner welding transmission system

Abstract

The utility model relates to plate processing technical field, especially a kind of rectangular frame piece corner welding transmission system.One kind of rectangular frame piece corner welding transmission system, including rack, conveying mechanism, first welding mechanism and second welding mechanism;The conveying mechanism is set to the rack, and the conveying mechanism is used to transmit rectangular frame piece along processing direction;The second welding mechanism is set to the downstream of the processing direction of the first welding mechanism;The first welding mechanism includes first welding mechanical hand group, first corner clamping assembly, first jacking clamping assembly and first horizontal clamping assembly set to the rack.Rectangular frame piece corner welding transmission system, not only overall realization clamping and fixing during welding process of rectangular frame piece, but also realize clamping and fixing at the corner of welding, and it is strong in fixed stability, effectively improve welding precision, solve the technical problem of poor fixed stability of existing welding device during welding process.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing technology, and in particular to a rectangular frame corner welding transmission system. Background Technology

[0002] In sheet metal processing, rectangular frames are commonly manufactured. This process involves multiple steps, typically starting by cutting the sheet metal into a flat, unfolded shape. Then, a bending machine is used to fold the four sides to form a frame structure. After forming the frame, adjacent sides at the four corners are welded together to create a stable, fixed structure. The result is a rectangular box-shaped frame. Because the bent parts of the rectangular frame are unstable during welding, they usually need to be fixed. Existing welding equipment typically only uses welding clamps to horizontally clamp the sides of the workpiece. However, during welding, the workpiece may move due to external forces. Simply clamping horizontally results in poor stability, leading to low welding accuracy and potential welding quality problems. Utility Model Content

[0003] In response to the problems raised in the background technology, the purpose of this utility model is to propose a rectangular frame corner welding transmission system. By setting corner clamping, vertical clamping, and horizontal clamping structures, the rectangular frame can be clamped and fixed not only as a whole during the welding process, but also at the welded corners. The system has strong fixation stability, and the rectangular frame will not shift position during the welding process, effectively improving welding accuracy. This solves the technical problems of poor workpiece fixation stability, low welding accuracy, and easy welding quality problems in existing welding devices.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A rectangular frame corner welding conveying system includes a frame, a conveying mechanism, a first welding mechanism, and a second welding mechanism; the conveying mechanism is disposed on the frame and is used to convey the rectangular frame along the processing direction; the second welding mechanism is disposed downstream of the first welding mechanism in the processing direction. The first welding mechanism includes a first welding robot assembly, a first corner clamping assembly, a first lifting clamping assembly, and a first horizontal clamping assembly disposed on the frame. The first corner clamping assembly is used to clamp and fix the four corners of the rectangular frame, the first lifting clamping assembly is used to clamp and fix the rectangular frame in the vertical direction, and the first horizontal clamping assembly is used to clamp and fix the rectangular frame in the horizontal direction. The first welding robot assembly is disposed on both sides of the frame in the feeding direction, and the first welding robot assembly is used to weld two corners of the rectangular frame on one side along the transmission direction. The second welding mechanism includes a second welding robot assembly, a second corner clamping assembly, a second lifting clamping assembly, and a second horizontal clamping assembly disposed on the frame. The second corner clamping assembly is used to clamp and fix the two corners of the rectangular frame on the other side along the conveying direction. The second lifting clamping assembly is used to clamp and fix the rectangular frame in the vertical direction. The second horizontal clamping assembly is used to clamp and fix the rectangular frame in the horizontal direction. The second welding robot assembly is disposed on both sides of the frame in the feeding direction and is used to weld the two corners of the rectangular frame on the other side along the conveying direction.

[0005] Optionally, the conveying mechanism is provided with a first welding station, which is used to position the rectangular frame; The first corner clamping assembly includes a first mounting base and a first clamping module. The first clamping module includes a first driving device and a first clamp. The first mounting base is fixedly disposed on the frame, and the first driving device is fixedly mounted on the first mounting base. The output end of the first driving device is fixedly connected to the first clamp. The first clamping module is distributed on the outer periphery of the four corners of the first welding station, and the clamping ends of the first clamps are set towards the four corners of the first welding station. The output end of the first driving device drives the first clamp to move toward the first welding station to clamp and fix the four corners of the rectangular frame, and the output end of the first driving device drives the first clamp to move away from the first welding station to release the fixation on the four corners of the rectangular frame.

[0006] Optionally, the first clamp includes a first connecting seat and a first clamping frame, one end of the first connecting seat is fixedly connected to the output end of the first driving device, and the other end of the first connecting seat is fixedly connected to the first clamping frame. The first clamping frame is provided with first clamping plates that are perpendicular to each other. The first clamping frame is provided with a first clamping cavity. The first clamping cavity is located between the included angles of the two first clamping plates. The first clamping cavity is open towards the first welding station. A first clearance gap is provided at the intersection of the two first clamping plates. The first clearance gap is connected to the first clamping cavity.

[0007] Optionally, the first welding mechanism further includes a first mounting frame fixedly installed on the frame; The first horizontal clamping assembly includes a first positioning plate, a first movable clamping plate, and a second driving device. The first positioning plate is fixedly mounted on the frame, and the second driving device is fixedly mounted on the first mounting frame. The first movable clamping plate is fixedly connected to the output end of the second driving device. The first positioning plate and the first movable clamping plate are respectively located on the upper sides of the conveying mechanism in the width direction. The second driving device drives the first movable clamping plate to move closer to and away from the first positioning plate. The first lifting and clamping assembly includes a first lifting baffle, a second lifting baffle, and multiple first lifting and clamping modules. Each first lifting and clamping module includes a third driving device and a first lifting block. The third driving device is fixedly mounted on the frame, and its output end is fixedly connected to the first lifting block. The third driving device drives the first lifting block to rise and fall. The first lifting and clamping modules are distributed at the four corners of the first welding station. The first lifting baffle is fixedly mounted on the top surface of the first positioning plate and is located above the corresponding first lifting block. The second lifting baffle is fixedly mounted on the first mounting frame and is located above the two first lifting blocks near the first movable clamping plate.

[0008] Optionally, the first welding robot group includes two first welding robots, which are disposed at the end of the frame away from the second welding mechanism; The second welding robot assembly includes two second welding robots, which are disposed at the end of the frame away from the first welding mechanism; The operating ends of the second welding robot and the first welding robot are respectively equipped with welding guns.

[0009] Optionally, the conveying mechanism is provided with a second welding station, which is used to position the rectangular frame; The second corner clamping assembly includes a second mounting base and a second clamping module. The second clamping module includes a fourth driving device and a second clamp. The second mounting base is fixedly disposed on the frame. The fourth driving device is fixedly mounted on the second mounting base. The output end of the fourth driving device is fixedly connected to the second clamp. The second clamping module is distributed on the outer periphery of the corner of the second welding station, and the second clamping module is located on the side of the second welding robot group away from the first welding mechanism, with the clamping end of the second clamp facing the corner of the second welding station; The output end of the fourth driving device drives the second clamp to move toward the second welding station to clamp and fix the two corners of the rectangular frame on the other side along the transmission direction, and the output end of the fourth driving device drives the second clamp to move away from the second welding station to release the fixation on the corners of the rectangular frame.

[0010] Optionally, the second clamp includes a second connecting seat and a second clamping frame, one end of the second connecting seat is fixedly connected to the output end of the fourth driving device, and the other end of the second connecting seat is fixedly connected to the second clamping frame; The second clamping frame is provided with mutually perpendicular second clamping plates. The second clamping frame is provided with a second clamping cavity. The second clamping cavity is located between the included angles of the two second clamping plates. The second clamping cavity is open towards the second welding station. A second clearance gap is provided at the intersection of the two second clamping plates. The second clearance gap is connected to the second clamping cavity.

[0011] Optionally, the second welding mechanism further includes a second mounting frame fixedly installed on the frame; The second horizontal clamping assembly includes a second positioning plate, a second movable clamping plate, and a fifth driving device. The second positioning plate is fixedly mounted on the frame, and the fifth driving device is fixedly mounted on the second mounting frame. The second movable clamping plate is fixedly connected to the output end of the fifth driving device. The second positioning plate and the second movable clamping plate are located on the upper sides of the conveying mechanism in the width direction, respectively. The fifth driving device drives the second movable clamping plate to move closer to and away from the second positioning plate. The second lifting and clamping assembly includes a third lifting baffle, a fourth lifting baffle, and multiple second lifting and clamping modules. Each second lifting and clamping module includes a sixth driving device and a second lifting block. The sixth driving device is fixedly mounted on the frame, and its output end is fixedly connected to the second lifting block. The sixth driving device drives the second lifting block to rise and fall. The second lifting and clamping modules are distributed at two corners of the second welding station, and are located on the side of the second welding robot assembly away from the first welding mechanism. The third lifting baffle is fixedly mounted on the top surface of the second positioning plate and is located above the second lifting block. The fourth lifting baffle is fixedly mounted on the second mounting frame and is located above the second lifting block near the second movable clamping plate.

[0012] Optionally, the conveying mechanism includes a first conveyor belt and a first material guiding assembly disposed on the frame, and the first material guiding assembly is disposed between the first welding mechanism and the second welding mechanism, and at the output end of the second welding mechanism; The first material guiding assembly includes a first adjusting seat and two first material guiding plates. The first adjusting seat is mounted on the frame, and the first material guiding plates are detachably mounted on the first adjusting seat. The first material guiding plates are disposed on both sides of the first conveyor belt in the feeding width direction.

[0013] Optionally, the rectangular frame corner welding conveying system further includes an unloading conveying mechanism, the input end of which is connected to the output end of the conveying mechanism; The unloading and conveying mechanism includes a second conveyor belt and a second guiding assembly disposed on the frame. The second guiding assembly includes a second adjusting seat, an adjusting shaft, and two guiding modules. The second adjusting seat is fixedly disposed on the frame and is disposed opposite to each other on both sides of the second conveyor belt in the feeding width direction. The adjusting shaft is fixedly connected between the two oppositely disposed second adjusting seats. The two guiding modules are disposed opposite to each other on both sides of the second conveyor belt in the feeding width direction. The guiding module includes a fixed seat and a second guiding plate. The fixed seat is movably disposed on the adjusting shaft along the length direction of the adjusting shaft, and the second guiding plate is fixedly disposed on the fixed seat.

[0014] Compared with the prior art, the embodiments of this utility model have the following beneficial effects: The aforementioned rectangular frame corner welding transmission system, by setting corner clamping, vertical clamping, and horizontal clamping structures, enables the rectangular frame to be clamped and fixed not only as a whole during the welding process, but also at the welded corners. This provides strong fixation stability, prevents the rectangular frame from shifting position during welding, effectively improves welding accuracy, and solves the technical problems of poor workpiece fixation stability, low welding accuracy, and easy welding quality issues in existing welding devices. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a rectangular frame corner welding transmission system according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of a rectangular frame corner welding transfer system according to an embodiment of the present invention (the first welding robot group and the second welding robot group are hidden).

[0017] Figure 3 This is a top view of a rectangular frame corner welding transfer system according to an embodiment of the present invention (the first and second welding robot groups are hidden).

[0018] Figure 4 This is a schematic diagram of the structure of the first welding mechanism of the rectangular frame corner welding transmission system according to an embodiment of the present invention (the first welding robot group is hidden).

[0019] Figure 5 This is a schematic diagram of the structure of the first fixture of the rectangular frame corner welding transmission system according to an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the structure of the second welding mechanism of the rectangular frame corner welding transmission system according to an embodiment of the present invention (the second welding robot assembly is hidden).

[0021] Figure 7 This is a schematic diagram of the structure of the second fixture in a rectangular frame corner welding transmission system according to an embodiment of the present invention.

[0022] Figure 8 yes Figure 2 Enlarged view of point A.

[0023] Figure 9 yes Figure 2 Enlarged view of point B.

[0024] Figure 10 This is a structural schematic diagram of a rectangular frame corner welding transmission system according to another embodiment of the present invention.

[0025] Figure 11This is a schematic diagram of the unloading and conveying mechanism of a rectangular frame corner welding conveying system according to another embodiment of the present invention.

[0026] Figure 12 This is a top view of the rectangular frame component of this utility model.

[0027] In the attached diagram: 1-Frame, 2-Conveying mechanism, 21-First welding station, 22-Second welding station, 23-First conveyor belt, 24-First material guiding assembly, 241-First adjusting seat, 242-First material guiding plate, 3-First welding mechanism, 31-First welding robot assembly, 311-First welding robot, 3111-Welding torch, 32-First corner clamping assembly, 321-First mounting base, 322-First clamping module, 323-First driving device, 324-First clamp, 3241-First connecting seat 3242-First clamping frame, 3243-First clamping plate, 3244-First clamping cavity, 3245-First clearance gap, 33-First lifting and clamping assembly, 331-First lifting baffle, 332-Second lifting baffle, 333-First lifting and clamping module, 3331-Third driving device, 3332-First lifting block, 34-First horizontal clamping assembly, 341-First positioning plate, 342-First movable clamping plate, 343-Second driving device, 35-First mounting frame, 4-Second welding mechanism 41-Second welding robot assembly, 411-Second welding robot, 42-Second corner clamping assembly, 421-Second mounting base, 422-Second clamping module, 423-Fourth drive device, 424-Second clamp, 4241-Second connecting base, 4242-Second clamping frame, 4243-Second clamping plate, 4244-Second clamping cavity, 4245-Second clearance gap, 43-Second lifting clamping assembly, 431-Third lifting baffle, 432-Fourth lifting baffle, 433-Second lifting clamping Module, 4331-Sixth drive device, 4332-Second lifting block, 44-Second horizontal clamping assembly, 441-Second positioning plate, 442-Second movable clamping plate, 443-Fifth drive device, 45-Second mounting frame, 5-Unloading and conveying mechanism, 51-Second conveyor belt, 52-Second material guiding assembly, 521-Second adjusting seat, 522-Adjusting shaft, 523-Material guiding module, 5231-Fixed seat, 5232-Second material guiding plate, 10-Rectangular frame, 101-Corner, 102-Bent section. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0030] like Figures 1 to 11 As shown, a rectangular frame corner welding conveying system includes a frame 1, a conveying mechanism 2, a first welding mechanism 3, and a second welding mechanism 4; the conveying mechanism 2 is disposed on the frame 1 and is used to convey the rectangular frame 10 along the processing direction; the second welding mechanism 4 is disposed downstream of the processing direction of the first welding mechanism 3; The first welding mechanism 3 includes a first welding robot assembly 31, a first corner clamping assembly 32, a first lifting clamping assembly 33, and a first horizontal clamping assembly 34 disposed on the frame 1. The first corner clamping assembly 32 is used to clamp and fix the four corners 101 of the rectangular frame 10. The first lifting clamping assembly 33 is used to clamp and fix the rectangular frame 10 in the vertical direction. The first horizontal clamping assembly 34 is used to clamp and fix the rectangular frame 10 in the horizontal direction. The first welding robot assembly 31 is disposed on both sides of the feeding direction of the frame 1. The first welding robot assembly 31 is used to weld two corners 101 of the rectangular frame 10 on one side along the transmission direction. The second welding mechanism 4 includes a second welding robot assembly 41, a second corner clamping assembly 42, a second lifting clamping assembly 43, and a second horizontal clamping assembly 44 disposed on the frame 1. The second corner clamping assembly 42 is used to clamp and fix the two corners 101 of the rectangular frame 10 on the other side along the conveying direction. The second lifting clamping assembly 43 is used to clamp and fix the rectangular frame 10 in the vertical direction. The second horizontal clamping assembly 44 is used to clamp and fix the rectangular frame 10 in the horizontal direction. The second welding robot assembly 41 is disposed on both sides of the feeding direction of the frame 1. The second welding robot assembly 41 is used to weld the two corners 101 of the rectangular frame 10 on the other side along the conveying direction.

[0031] like Figure 12As shown, the rectangular frame 10 is the workpiece to be welded. The four edges of the rectangular frame 10 have been bent (forming four upward-bent portions 102). Between two adjacent bent portions 102 are the corners 101 to be welded, and there are a total of four corners 101 to be welded. During welding, the four upward-bent portions 102 form an upward-opening groove. The rectangular frame 10 is placed with the groove facing upward during welding. After welding, the rectangular frame 10 in the shape of a rectangular box is obtained.

[0032] By setting up the conveying mechanism 2, the rectangular frame 10 is transported along the processing direction, such as... Figure 1 As shown, in this embodiment, the rectangular frame 10 is transported from right to left. The second welding mechanism 4 is located downstream of the first welding mechanism 3, that is, the second welding mechanism 4 is located to the left of the first welding mechanism 3. When the conveying mechanism 2 transports the rectangular frame 10 to the first welding mechanism 3, the conveying mechanism 2 stops transporting, and the first corner clamping assembly 32, the first lifting clamping assembly 33, and the first horizontal clamping assembly 34 are activated together. The first corner clamping assembly 32 clamps and fixes the four corners 101 of the rectangular frame 10, the first lifting clamping assembly 33 clamps and fixes the rectangular frame 10 in the vertical direction, and the first horizontal clamping assembly 34 clamps and fixes the rectangular frame 10 in the horizontal direction, so that the rectangular frame 10 can be stably fixed. Then, the first welding robot group 31 starts to weld the two corners 101 of the rectangular frame 10 on one side along the transport direction. In this embodiment, the first welding robot group 31 welds the two corners 101 of the rectangular frame 10 on the right side along the transport direction.

[0033] After the first welding mechanism 3 completes welding, the first corner clamping assembly 32, the first lifting clamping assembly 33, and the first horizontal clamping assembly 34 reset to release the fixation on the rectangular frame 10. The conveying mechanism 2 starts to continue conveying the rectangular frame 10 to the left. When the conveying mechanism 2 conveys the rectangular frame 10 to the second welding mechanism 4, the conveying mechanism 2 stops conveying, and the second corner clamping assembly 42, the second lifting clamping assembly 43, and the second horizontal clamping assembly 44 start together. The second corner clamping assembly 42 clamps and fixes the two corners 101 of the rectangular frame 10 on the other side along the conveying direction. (In this embodiment, the second corner clamping assembly 42 clamps and fixes the two left corners 101 of the rectangular frame 10 along the transmission direction.) The second lifting clamping assembly 43 clamps and fixes the rectangular frame 10 in the vertical direction, and the second horizontal clamping assembly 44 clamps and fixes the rectangular frame 10 in the horizontal direction, so that the rectangular frame 10 can be stably fixed. Then, the second welding robot assembly 41 starts to weld the two corners 101 on the other side of the rectangular frame 10 along the transmission direction (in this embodiment, the second welding robot assembly 41 welds the two left corners 101 of the rectangular frame 10 along the transmission direction). After welding is completed, the first corner clamping assembly 32, the first lifting clamping assembly 33 and the first horizontal clamping assembly 34 are reset to release the fixation on the rectangular frame 10, and the conveying mechanism 2 starts to continue to convey the rectangular frame 10 to the left for unloading.

[0034] The rectangular frame corner welding transmission system, by setting corner clamping, vertical clamping, and horizontal clamping structures, enables the rectangular frame 10 to be clamped and fixed not only as a whole during the welding process, but also at the welded corners 101. This results in strong fixation stability, preventing the rectangular frame 10 from shifting position during welding, effectively improving welding accuracy, and solving the technical problems of poor workpiece fixation stability, low welding accuracy, and easy welding quality issues in existing welding devices.

[0035] To further explain, in this embodiment, since the bent portions 102 on the four sides of the rectangular frame 10 are unstable in the initial state (when all four corners 101 are welded), when welding the two corners 101 on the right side of the rectangular frame 10, the first corner clamping assembly 32 simultaneously clamps and fixes the four unwelded corners 101 of the rectangular frame 10, which can ensure the clamping stability of the workpiece during the welding process. If only the corners 101 to be welded are clamped and fixed, the bent portions 102 adjacent to the unwelded corners 101 may wobble under the clamping action of the first horizontal clamping assembly 34, thereby affecting the welding accuracy and welding quality. After the rectangular frame 10 has been welded by the first welding mechanism 3 (the two right corners 101 of the rectangular frame 10 have been welded), the two right corners 101 are now stable. Even if the first horizontal clamping assembly 34 clamps, the adjacent bent portion 102 of the two right corners 101 will not wobble. Therefore, the second corner clamping assembly 42 only needs to clamp and fix the two left corners 101 of the rectangular frame 10. While ensuring welding accuracy and welding quality, it can effectively reduce equipment production costs.

[0036] To further explain, the conveying mechanism 2 is provided with a first welding station 21, which is used to position the rectangular frame 10; The first corner clamping assembly 32 includes a first mounting base 321 and a first clamping module 322. The first clamping module 322 includes a first driving device 323 and a first clamp 324. The first mounting base 321 is fixedly disposed on the frame 1. The first driving device 323 is fixedly mounted on the first mounting base 321. The output end of the first driving device 323 is fixedly connected to the first clamp 324. The first clamping module 322 is distributed on the outer periphery of the four corners of the first welding station 21, and the clamping ends of the first clamping fixture 324 are set towards the four corners of the first welding station 21. The output end of the first driving device 323 drives the first clamp 324 to move toward the first welding station 21 to clamp and fix the four corners 101 of the rectangular frame 10, and the output end of the first driving device 323 drives the first clamp 324 away from the first welding station 21 to release the fixation of the four corners 101 of the rectangular frame 10.

[0037] By setting the first mounting base 321, the first mounting base 321 can fix the first clamp module 322. The first driving device 323 serves as the power source for driving the first clamp 324 and can control the first clamp 324 to clamp and fix the rectangular frame 10 and release the rectangular frame 10.

[0038] Specifically, in this embodiment, the driving direction of the output end of the first driving device 323 forms a 45° angle with the left and right direction, and the first clamp 324 is also inclined at a 45° angle with the left and right direction. There are four first clamp modules 322, which are arranged in a mirror symmetrical manner. The four first clamps 324 are respectively arranged at the four corners of the first welding station 21. When the first driving device 323 drives the first clamps 324 to move closer to the first welding station 21, the four first clamps 324 simultaneously clamp and fix the four corners 101 of the rectangular frame 10. When the first driving device 323 drives the first clamps 324 to move away from the first welding station 21, the four first clamps 324 simultaneously move away from the four corners 101 of the rectangular frame 10, thereby releasing the fixation on the four corners 101 of the rectangular frame 10.

[0039] Specifically, the first driving device 323 is a three-axis cylinder, which can quickly clamp the four corners 101 of the rectangular frame 10.

[0040] Preferably, two first mounting bases 321 are provided. The first mounting bases 321 are arranged along the width direction of the conveying mechanism 2. Two first clamping modules 322 are mirror-symmetrically arranged in the length direction of each first mounting base 321. The first mounting base 321 has an adjustment groove arranged along the width direction of the conveying mechanism 2. The first driving device 323 can be fixedly installed on the first mounting base 321 with bolts (the cylinder of the first driving device 323 has a mounting hole corresponding to the adjustment groove). The installation position of the first driving device 323 can also be adjusted according to the width dimension of the rectangular frame 10 through the adjustment groove, which has strong applicability.

[0041] To further explain, the first clamp 324 includes a first connecting seat 3241 and a first clamping frame 3242. One end of the first connecting seat 3241 is fixedly connected to the output end of the first driving device 323, and the other end of the first connecting seat 3241 is fixedly connected to the first clamping frame 3242. The first clamping frame 3242 is provided with first clamping plates 3243 that are perpendicular to each other. The first clamping frame 3242 has a first clamping cavity 3244. The first clamping cavity 3244 is located between the included angles of the two first clamping plates 3243. The first clamping cavity 3244 is open towards the first welding station 21. A first clearance gap 3245 is provided at the intersection of the two first clamping plates 3243. The first clearance gap 3245 is connected to the first clamping cavity 3244.

[0042] By setting the first connecting seat 3241 and the first clamping frame 3242, the first connecting seat 3241 connects the first driving device 323 and the first clamping frame 3242, and the first clamping frame 3242 is used to clamp the rectangular frame 10 and clamp the rectangular frame 10 in the first clamping cavity 3244. The first clamping plates 3243 are perpendicular to each other and correspond to the rectangular frame 10 (one of the first clamping plates 3243 is arranged in the left-right direction and the other of the first clamping plates 3243 is arranged in the front-back direction), which can clamp the two adjacent bent portions 102 of the rectangular frame 10 located at the corner 101.

[0043] By setting the first clearance gap 3245, which corresponds to the position to be welded at the corner 101 of the rectangular frame 10, the welding process can be avoided from being affected by the first clamping frame 3242, so that the welding can be carried out smoothly.

[0044] Furthermore, the first welding mechanism 3 also includes a first mounting frame 35 fixedly installed on the frame 1; The first horizontal clamping assembly 34 includes a first positioning plate 341, a first movable clamping plate 342, and a second driving device 343. The first positioning plate 341 is fixedly mounted on the frame 1, and the second driving device 343 is fixedly mounted on the first mounting frame 35. The first movable clamping plate 342 is fixedly connected to the output end of the second driving device 343. The first positioning plate 341 and the first movable clamping plate 342 are respectively located on the upper sides of the conveying mechanism 2 in the width direction. The second driving device 343 drives the first movable clamping plate 342 to move closer to and away from the first positioning plate 341. The first lifting and clamping assembly 33 includes a first lifting baffle 331, a second lifting baffle 332, and a plurality of first lifting and clamping modules 333. Each first lifting and clamping module 333 includes a third driving device 3331 and a first lifting block 3332. The third driving device 3331 is fixedly mounted on the frame 1, and its output end is fixedly connected to the first lifting block 3332. The third driving device 3331 drives the first lifting block 3332 to rise and fall. The first lifting and clamping modules 333 are distributed at the four corners of the first welding station 21. The first lifting baffle 331 is fixedly mounted on the top surface of the first positioning plate 341 and is located above the corresponding first lifting block 3332. The second lifting baffle 332 is fixedly mounted on the first mounting frame 35 and is located above the two first lifting blocks 3332 near the first movable clamping plate 342.

[0045] Specifically, the first horizontal clamping assembly 34 and the first lifting clamping assembly 33 are located between the four first clamping modules 322. The first positioning plate 341 is located at the front end of the frame 1, and the first movable clamping plate 342 is located behind the first positioning plate 341. The first positioning plate 341 is used to fix the front edge of the rectangular frame 10. When the second driving device 343 drives the first movable clamping plate 342 to move closer to the first positioning plate 341, the first movable clamping plate 342 abuts against the rear edge of the rectangular frame 10 in the horizontal direction and cooperates with the first positioning plate 341 to clamp and fix the rectangular frame 10 in the horizontal direction. When the second driving device 343 drives the first movable clamping plate 342 to move away from the first positioning plate 341, the first movable clamping plate 342 releases its fixation on the rectangular frame 10.

[0046] To further explain, the first lifting and clamping module 333 is distributed at the four corners of the first welding station 21. The first lifting baffle 331 is fixedly installed at the left and right ends of the first positioning plate 341. The first lifting blocks 3332 of the two first lifting and clamping modules 333 at the front end correspond to one of the first lifting baffles 331 respectively. The second lifting baffle 332 extends in the left and right direction. The first lifting blocks 3332 of the two first lifting and clamping modules 333 at the rear end correspond to the second lifting baffle 332. When the third driving device 3331 drives the first lifting blocks 3332 to rise, the first lifting blocks 3332 lift the rectangular frame 10 from the bottom. The top of the rectangular frame 10 is limited by the first lifting baffle 331 and the second lifting baffle 332, thereby achieving the clamping and fixing of the rectangular frame 10 in the vertical direction. When the third driving device 3331 drives the first lifting block 3332 to descend, the rectangular frame 10 is supported on the first lifting block 3332. As the descent proceeds, the top surface of the rectangular frame 10 disengages from the first lifting baffle 331 and the second lifting baffle 332 to release the fixation on the rectangular frame 10.

[0047] Furthermore, multiple mounting holes can be provided along the front-to-back direction in the first mounting frame 35, and the second lifting baffle 332 is fixedly connected to the first mounting frame 35 by bolts; the second drive device 343 is also fixedly connected to the first mounting frame 35 by bolts through mounting holes on the mounting plate (the second drive device 343 is fixedly mounted on the mounting plate); by providing multiple mounting holes at intervals along the front-to-back direction in the first mounting frame 35, the mounting and fixing positions of the second lifting baffle 332 and the second drive device 343 can be adjusted according to the width dimension of the rectangular frame 10. In addition, the third drive device 3331 near the first movable clamping plate 342 can also be movably mounted on the frame 1 via a linear guide rail, allowing the position of the third drive device 3331 to be adjusted according to the width dimension of the rectangular frame 10.

[0048] Specifically, the second driving device 343 and the third driving device 3331 are cylinders, which can quickly clamp the rectangular frame 10 in the horizontal and vertical directions.

[0049] To further explain, the first welding robot group 31 includes two first welding robots 311, which are disposed at the end of the frame 1 away from the second welding mechanism 4; The second welding robot assembly 41 includes two second welding robots 411, which are disposed at the end of the frame 1 away from the first welding mechanism 3; The operating end of the second welding robot 411 and the operating end of the first welding robot 311 are respectively equipped with welding guns 3111.

[0050] The first welding robot 311 and the second welding robot 411 are respectively positioned close to the two corners 101 that need to be welded. In this embodiment, the first welding robot 311 is positioned at the end of the frame 1 away from the second welding mechanism 4, so that the two first welding robots 311 can weld the two right corners 101 of the rectangular frame 10 respectively; the second welding robot 411 is positioned at the end of the frame 1 away from the first welding mechanism 3, so that the two second welding robots 411 can weld the two left corners 101 of the rectangular frame 10 respectively.

[0051] To further explain, the conveying mechanism 2 is provided with a second welding station 22, which is used to position the rectangular frame 10; The second corner clamping assembly 42 includes a second mounting base 421 and a second clamping module 422. The second clamping module 422 includes a fourth driving device 423 and a second clamp 424. The second mounting base 421 is fixedly mounted on the frame 1. The fourth driving device 423 is fixedly mounted on the second mounting base 421. The output end of the fourth driving device 423 is fixedly connected to the second clamp 424. The second clamping module 422 is distributed on the outer periphery of the corner of the second welding station 22, and the second clamping module 422 is located on the side of the second welding robot group 41 away from the first welding mechanism 3, and the clamping end of the second clamp 424 is set towards the corner of the second welding station 22; The output end of the fourth driving device 423 drives the second clamp 424 to move toward the second welding station 22 to clamp and fix the two corners 101 of the rectangular frame 10 on the other side of the transmission direction, and the output end of the fourth driving device 423 drives the second clamp 424 to move away from the second welding station 22 to release the fixation of the corners 101 of the rectangular frame 10.

[0052] By setting the second mounting base 421, the second mounting base 421 can fix the second clamp module 422. The fourth driving device 423 serves as the power source for driving the second clamp 424 and can control the second clamp 424 to clamp and fix the rectangular frame 10 and release the rectangular frame 10.

[0053] Specifically, in this embodiment, the driving direction of the output end of the fourth driving device 423 forms a 45° angle with the left and right direction, and the second clamp 424 is also inclined at a 45° angle with the left and right direction. There are two second clamp modules 422, which are mirror-symmetrically arranged. The two second clamps 424 correspond to the two corners of the second welding station 22 away from the first welding mechanism 3. When the fourth driving device 423 drives the second clamp 424 to move closer to the second welding station 22, the two second clamps 424 simultaneously clamp and fix the two corners 101 (i.e., the corners 101 that have not been welded) of the rectangular frame 10 on the other side along the transmission direction. When the fourth driving device 423 drives the second clamp 424 to move away from the second welding station 22, the two second clamps 424 simultaneously move away from the two corners 101 of the rectangular frame 10, thereby releasing the fixation on the two corners 101 of the rectangular frame 10.

[0054] Specifically, the fourth driving device 423 is a three-axis cylinder, which can quickly clamp the two corners 101 of the rectangular frame 10.

[0055] Preferably, the second mounting base 421 is arranged along the width direction of the conveying mechanism 2, and two second clamping modules 422 are mirror-symmetrically arranged along the length direction of the second mounting base 421. The second mounting base 421 has an adjustment groove arranged along the width direction of the conveying mechanism 2. The fourth driving device 423 can be fixedly installed on the second mounting base 421 with bolts (the cylinder of the fourth driving device 423 has a mounting hole corresponding to the adjustment groove). The installation position of the fourth driving device 423 can also be adjusted according to the width dimension of the rectangular frame 10 through the adjustment groove, which has strong applicability.

[0056] To further explain, the second clamp 424 includes a second connecting seat 4241 and a second clamping frame 4242. One end of the second connecting seat 4241 is fixedly connected to the output end of the fourth driving device 423, and the other end of the second connecting seat 4241 is fixedly connected to the second clamping frame 4242. The second clamping frame 4242 is provided with mutually perpendicular second clamping plates 4243. The second clamping frame 4242 has a second clamping cavity 4244. The second clamping cavity 4244 is located between the included angle range of the two second clamping plates 4243. The second clamping cavity 4244 is open towards the second welding station 22. A second clearance gap 4245 is provided at the intersection of the two second clamping plates 4243. The second clearance gap 4245 is connected to the second clamping cavity 4244.

[0057] By setting the second connecting seat 4241 and the second clamping frame 4242, the second connecting seat 4241 connects the fourth driving device 423 and the second clamping frame 4242, and the second clamping frame 4242 is used to clamp the rectangular frame 10, clamping the rectangular frame 10 in the second clamping cavity 4244. The second clamping plates 4243 are perpendicular to each other and correspond to the rectangular frame 10 (one of the second clamping plates 4243 is arranged in the left-right direction and the other is arranged in the front-back direction), which can clamp the two adjacent bent portions 102 of the rectangular frame 10 located at the corner 101.

[0058] By setting the second clearance gap 4245, which corresponds to the position to be welded at the corner 101 of the rectangular frame 10, the welding process can be avoided from being affected by the second clamping frame 4242, so that the welding can be carried out smoothly.

[0059] Specifically, during welding, the welding torch 3111 extends into the corresponding first clamping cavity 3244 and second clamping cavity 4244 to weld the corners 101 of the corresponding rectangular frame 10.

[0060] Furthermore, the second welding mechanism 4 also includes a second mounting frame 45 fixedly installed on the frame 1; The second horizontal clamping assembly 44 includes a second positioning plate 441, a second movable clamping plate 442, and a fifth driving device 443. The second positioning plate 441 is fixedly mounted on the frame 1, and the fifth driving device 443 is fixedly mounted on the second mounting frame 45. The second movable clamping plate 442 is fixedly connected to the output end of the fifth driving device 443. The second positioning plate 441 and the second movable clamping plate 442 are respectively located on the upper sides of the conveying mechanism 2 in the width direction. The fifth driving device 443 drives the second movable clamping plate 442 to move closer to and away from the second positioning plate 441. The second lifting and clamping assembly 43 includes a third lifting baffle 431, a fourth lifting baffle 432, and a plurality of second lifting and clamping modules 433. Each second lifting and clamping module 433 includes a sixth driving device 4331 and a second lifting block 4332. The sixth driving device 4331 is fixedly mounted on the frame 1, and its output end is fixedly connected to the second lifting block 4332. The sixth driving device 4331 drives the second lifting block 4332 to rise and fall. The second lifting and clamping modules 433 are distributed among the components of the frame 1. The second welding station 22 is located at two corners, and the second lifting clamping module 433 is located on the side of the second welding robot group 41 away from the first welding mechanism 3; the third lifting baffle 431 is fixedly installed on the top surface of the second positioning plate 441, and the third lifting baffle 431 is located above the second lifting block 4332; the fourth lifting baffle 432 is fixedly installed on the second mounting frame 45, and the fourth lifting baffle 432 is located above the second lifting block 4332 near the second movable clamping plate 442.

[0061] Specifically, the second horizontal clamping assembly 44 and the second lifting clamping assembly 43 are located on the side of the second clamping module 422 near the second welding robot assembly 41. The second positioning plate 441 is located at the front end of the frame 1, and the second movable clamping plate 442 is located behind the second positioning plate 441. The second positioning plate 441 is used to fix the front edge of the rectangular frame 10. When the fifth driving device 443 drives the second movable clamping plate 442 to move closer to the second positioning plate 441, the second movable clamping plate 442 abuts against the rear edge of the rectangular frame 10 in the horizontal direction and cooperates with the second positioning plate 441 to clamp and fix the rectangular frame 10 in the horizontal direction. When the fifth driving device 443 drives the second movable clamping plate 442 to move away from the second positioning plate 441, the second movable clamping plate 442 releases its fixation on the rectangular frame 10.

[0062] In this embodiment, the second lifting and clamping module 433 is distributed at two corners of the second welding station 22. The third lifting baffle 431 is fixedly installed at the left end of the second positioning plate 441. The fourth lifting baffle 432 extends in the left-right direction. When the sixth driving device 4331 drives the second lifting block 4332 to rise, the second lifting block 4332 lifts the rectangular frame 10 from the bottom. The top of the rectangular frame 10 is limited by the third lifting baffle 431 and the fourth lifting baffle 432, thereby achieving clamping and fixing of the rectangular frame 10 in the vertical direction. When the sixth driving device 4331 drives the second lifting block 4332 to descend, the rectangular frame 10 is supported on the second lifting block 4332. As the descent proceeds, the top surface of the rectangular frame 10 disengages from the third lifting baffle 431 and the fourth lifting baffle 432, thereby releasing the fixation of the rectangular frame 10.

[0063] To further explain, multiple mounting holes can be provided in the second mounting frame 45 along the front-back direction, and the fourth lifting baffle 432 is fixedly connected to the second mounting frame 45 by bolts; the fifth driving device 443 is also fixedly connected to the mounting plate and the mounting hole of the second mounting frame 45 by bolts through the mounting hole on the mounting plate (the fifth driving device 443 is fixedly mounted on the mounting plate); by providing multiple mounting holes at intervals in the second mounting frame 45 along the front-back direction, the installation and fixing positions of the fourth lifting baffle 432 and the fifth driving device 443 can be adjusted according to the width of the rectangular frame 10.

[0064] In addition, the sixth drive device 4331, which is close to the second movable clamping plate 442, can also be movably mounted on the frame 1 via a linear guide rail, so as to adjust the position of the sixth drive device 4331 according to the width of the rectangular frame 10.

[0065] Specifically, the fifth driving device 443 and the sixth driving device 4331 are cylinders, which can quickly clamp the rectangular frame 10 in the horizontal and vertical directions.

[0066] To further explain, the conveying mechanism 2 includes a first conveyor belt 23 and a first material guiding assembly 24 disposed on the frame 1, and the first material guiding assembly 24 is disposed between the first welding mechanism 3 and the second welding mechanism 4 and at the output end of the second welding mechanism 4 respectively; The first material guiding assembly 24 includes a first adjusting seat 241 and two first material guiding plates 242. The first adjusting seat 241 is mounted on the frame 1, and the first material guiding plates 242 are detachably mounted on the first adjusting seat 241. The first material guiding plates 242 are disposed on both sides of the first conveyor belt 23 in the feeding width direction.

[0067] The top of the first adjusting seat 241 is specifically made of aluminum profile. The first adjusting seat 241 has a through groove for mounting the first guide plate 242. The through groove is arranged along the width direction of the feeding. The first guide plate 242 can be detachably mounted on the through groove of the first adjusting seat 241 by bolts, thereby allowing the spacing between the two first guide plates 242 to be adjusted according to the width of the rectangular frame 10, making it highly adaptable. The first guide plate 242 can guide the rectangular frame 10 in the transmission direction, preventing the rectangular frame 10 from deviating during transmission.

[0068] Furthermore, by setting the first material guiding component 24 between the first welding mechanism 3 and the second welding mechanism 4, with the feeding end of the first material guiding component 24 corresponding to the discharging end of the first welding mechanism 3 and the discharging end of the first material guiding component 24 corresponding to the feeding end of the second welding mechanism 4, the rectangular frame can enter the second welding mechanism 4 at the same position in the conveying width direction (i.e., the front-back direction in the figure) after the first welding by the first welding mechanism 3. This facilitates the second lifting clamping component 43 and the second horizontal clamping component 44 to clamp and fix the rectangular frame in the vertical and horizontal directions.

[0069] In another embodiment, the first material guiding assembly 24 located between the first welding mechanism 3 and the second welding mechanism 4 may not have the first adjusting seat 241, but only two first material guiding plates 242. One of the first material guiding plates 242 is fixedly disposed at the front end of the frame 1, and the other first material guiding plate 242 is detachably installed on the second mounting frame 45. The second mounting frame 45 is provided with a plurality of mounting holes spaced apart along the feeding width direction of the first conveyor belt 23. The first material guiding plate 242 is detachably installed in the mounting holes by bolts, thereby adjusting the distance between the two first material guiding plates 242.

[0070] In one embodiment of the present invention, the rectangular frame corner welding transmission system further includes an unloading transmission mechanism 5, the input end of which is connected to the output end of the conveying mechanism 2; The unloading and conveying mechanism 5 includes a second conveyor belt 51 and a second guiding assembly disposed on the frame 1. The second guiding assembly includes a second adjusting seat 521, an adjusting shaft 522, and two guiding modules 523. The second adjusting seat 521 is fixedly disposed on the frame 1 and is disposed opposite to each other on both sides of the second conveyor belt 51 in the feeding width direction. The adjusting shaft 522 is fixedly connected between the two oppositely disposed second adjusting seats 521. The two guiding modules 523 are disposed opposite to each other on both sides of the second conveyor belt 51 in the feeding width direction. The guiding module 523 includes a fixed seat 5231 and a second guiding plate 5232. The fixed seat 5231 is movably disposed on the adjusting shaft 522 along the length direction of the adjusting shaft 522, and the second guiding plate 5232 is fixedly disposed on the fixed seat 5231.

[0071] Specifically, the fixed seat 5231 can be movably mounted on the adjusting shaft 522 via a guide shaft support. Since the second adjusting seat 521 is positioned opposite each other on both sides of the second conveyor belt 51 in the feeding width direction, i.e., the adjusting shaft 522 is positioned along the width direction of the second conveyor belt 51, the distance between the oppositely mounted fixed seats 5231 can be adjusted according to the width of the rectangular frame 10, thereby adjusting the distance between the second guide plates 5232. The second guide plate 5232 can guide the rectangular frame 10 in the transmission direction, allowing the rectangular frame 10 to smoothly feed material along the path guided by the second guide plate 5232.

[0072] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A conveying system for welding the corners of rectangular frame components, characterized in that, It includes a frame, a conveying mechanism, a first welding mechanism, and a second welding mechanism; the conveying mechanism is disposed on the frame and is used to transport the rectangular frame part along the processing direction; the second welding mechanism is disposed downstream of the first welding mechanism in the processing direction. The first welding mechanism includes a first welding robot assembly, a first corner clamping assembly, a first lifting clamping assembly, and a first horizontal clamping assembly disposed on the frame. The first corner clamping assembly is used to clamp and fix the four corners of the rectangular frame, the first lifting clamping assembly is used to clamp and fix the rectangular frame in the vertical direction, and the first horizontal clamping assembly is used to clamp and fix the rectangular frame in the horizontal direction. The first welding robot assembly is disposed on both sides of the frame in the feeding direction, and the first welding robot assembly is used to weld two corners of the rectangular frame on one side along the transmission direction. The second welding mechanism includes a second welding robot assembly, a second corner clamping assembly, a second lifting clamping assembly, and a second horizontal clamping assembly disposed on the frame. The second corner clamping assembly is used to clamp and fix the two corners of the rectangular frame on the other side along the conveying direction. The second lifting clamping assembly is used to clamp and fix the rectangular frame in the vertical direction. The second horizontal clamping assembly is used to clamp and fix the rectangular frame in the horizontal direction. The second welding robot assembly is disposed on both sides of the frame in the feeding direction and is used to weld the two corners of the rectangular frame on the other side along the conveying direction.

2. The rectangular frame corner welding transmission system according to claim 1, characterized in that, The conveying mechanism is provided with a first welding station, which is used to position the rectangular frame; The first corner clamping assembly includes a first mounting base and a first clamping module. The first clamping module includes a first driving device and a first clamp. The first mounting base is fixedly disposed on the frame, and the first driving device is fixedly mounted on the first mounting base. The output end of the first driving device is fixedly connected to the first clamp. The first clamping module is distributed on the outer periphery of the four corners of the first welding station, and the clamping ends of the first clamps are set towards the four corners of the first welding station. The output end of the first driving device drives the first clamp to move toward the first welding station to clamp and fix the four corners of the rectangular frame, and the output end of the first driving device drives the first clamp to move away from the first welding station to release the fixation on the four corners of the rectangular frame.

3. The rectangular frame corner welding transmission system according to claim 2, characterized in that, The first fixture includes a first connecting seat and a first clamping frame. One end of the first connecting seat is fixedly connected to the output end of the first driving device, and the other end of the first connecting seat is fixedly connected to the first clamping frame. The first clamping frame is provided with first clamping plates that are perpendicular to each other. The first clamping frame is provided with a first clamping cavity. The first clamping cavity is located between the included angles of the two first clamping plates. The first clamping cavity is open towards the first welding station. A first clearance gap is provided at the intersection of the two first clamping plates. The first clearance gap is connected to the first clamping cavity.

4. The rectangular frame corner welding transmission system according to claim 2, characterized in that, The first welding mechanism further includes a first mounting frame fixedly installed on the frame; The first horizontal clamping assembly includes a first positioning plate, a first movable clamping plate, and a second driving device. The first positioning plate is fixedly mounted on the frame, and the second driving device is fixedly mounted on the first mounting frame. The first movable clamping plate is fixedly connected to the output end of the second driving device. The first positioning plate and the first movable clamping plate are respectively located on the upper sides of the conveying mechanism in the width direction. The second driving device drives the first movable clamping plate to move closer to and away from the first positioning plate. The first lifting and clamping assembly includes a first lifting baffle, a second lifting baffle, and multiple first lifting and clamping modules. Each first lifting and clamping module includes a third driving device and a first lifting block. The third driving device is fixedly mounted on the frame, and its output end is fixedly connected to the first lifting block. The third driving device drives the first lifting block to rise and fall. The first lifting and clamping modules are distributed at the four corners of the first welding station. The first lifting baffle is fixedly mounted on the top surface of the first positioning plate and is located above the corresponding first lifting block. The second lifting baffle is fixedly mounted on the first mounting frame and is located above the two first lifting blocks near the first movable clamping plate.

5. The rectangular frame corner welding transmission system according to claim 1, characterized in that, The first welding robot assembly includes two first welding robots, which are disposed at the end of the frame away from the second welding mechanism; The second welding robot assembly includes two second welding robots, which are disposed at the end of the frame away from the first welding mechanism; The operating ends of the second welding robot and the first welding robot are respectively equipped with welding guns.

6. The rectangular frame corner welding transmission system according to claim 1, characterized in that, The conveying mechanism is provided with a second welding station, which is used to position the rectangular frame; The second corner clamping assembly includes a second mounting base and a second clamping module. The second clamping module includes a fourth driving device and a second clamp. The second mounting base is fixedly disposed on the frame. The fourth driving device is fixedly mounted on the second mounting base. The output end of the fourth driving device is fixedly connected to the second clamp. The second clamping module is distributed on the outer periphery of the corner of the second welding station, and the second clamping module is located on the side of the second welding robot group away from the first welding mechanism, with the clamping end of the second clamp facing the corner of the second welding station; The output end of the fourth driving device drives the second clamp to move toward the second welding station to clamp and fix the two corners of the rectangular frame on the other side along the transmission direction, and the output end of the fourth driving device drives the second clamp to move away from the second welding station to release the fixation on the corners of the rectangular frame.

7. The rectangular frame corner welding transmission system according to claim 6, characterized in that, The second clamp includes a second connecting seat and a second clamping frame. One end of the second connecting seat is fixedly connected to the output end of the fourth driving device, and the other end of the second connecting seat is fixedly connected to the second clamping frame. The second clamping frame is provided with mutually perpendicular second clamping plates. The second clamping frame is provided with a second clamping cavity. The second clamping cavity is located between the included angles of the two second clamping plates. The second clamping cavity is open towards the second welding station. A second clearance gap is provided at the intersection of the two second clamping plates. The second clearance gap is connected to the second clamping cavity.

8. The rectangular frame corner welding transmission system according to claim 6, characterized in that, The second welding mechanism further includes a second mounting frame fixedly installed on the frame; The second horizontal clamping assembly includes a second positioning plate, a second movable clamping plate, and a fifth driving device. The second positioning plate is fixedly mounted on the frame, and the fifth driving device is fixedly mounted on the second mounting frame. The second movable clamping plate is fixedly connected to the output end of the fifth driving device. The second positioning plate and the second movable clamping plate are located on the upper sides of the conveying mechanism in the width direction, respectively. The fifth driving device drives the second movable clamping plate to move closer to and away from the second positioning plate. The second lifting and clamping assembly includes a third lifting baffle, a fourth lifting baffle, and multiple second lifting and clamping modules. Each second lifting and clamping module includes a sixth driving device and a second lifting block. The sixth driving device is fixedly mounted on the frame, and its output end is fixedly connected to the second lifting block. The sixth driving device drives the second lifting block to rise and fall. The second lifting and clamping modules are distributed at two corners of the second welding station, and are located on the side of the second welding robot assembly away from the first welding mechanism. The third lifting baffle is fixedly mounted on the top surface of the second positioning plate and is located above the second lifting block. The fourth lifting baffle is fixedly mounted on the second mounting frame and is located above the second lifting block near the second movable clamping plate.

9. The rectangular frame corner welding transmission system according to claim 1, characterized in that, The conveying mechanism includes a first conveyor belt and a first material guiding component disposed on the frame. The first material guiding component is disposed between the first welding mechanism and the second welding mechanism, and at the output end of the second welding mechanism. The first material guiding assembly includes a first adjusting seat and two first material guiding plates. The first adjusting seat is mounted on the frame, and the first material guiding plates are detachably mounted on the first adjusting seat. The first material guiding plates are disposed on both sides of the first conveyor belt in the feeding width direction.

10. The rectangular frame corner welding transmission system according to claim 9, characterized in that, The rectangular frame corner welding conveying system also includes an unloading conveying mechanism, the input end of which is connected to the output end of the conveying mechanism; The unloading and conveying mechanism includes a second conveyor belt and a second guiding assembly disposed on the frame. The second guiding assembly includes a second adjusting seat, an adjusting shaft, and two guiding modules. The second adjusting seat is fixedly disposed on the frame and is disposed opposite to each other on both sides of the second conveyor belt in the feeding width direction. The adjusting shaft is fixedly connected between the two oppositely disposed second adjusting seats. The two guiding modules are disposed opposite to each other on both sides of the second conveyor belt in the feeding width direction. The guiding module includes a fixed seat and a second guiding plate. The fixed seat is movably disposed on the adjusting shaft along the length direction of the adjusting shaft, and the second guiding plate is fixedly disposed on the fixed seat.

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