A multi-point resistance welding plus laser welding device and process for high-speed wire harness welding

Abstract

The present invention discloses a multi-point resistance welding plus laser welding device and process for high-speed wire harness welding, which relates to the field of high-speed wire harness welding, including a conveyor line composed of a synchronous belt and a slide rail, with several workstations arranged in sequence along the conveyor line; a carrier slidably mounted on the slide rail for clamping and fixing the product wire harness; a shaping mechanism for shaping the product wire harness; a flattening mechanism arranged behind the shaping mechanism for flattening the shaped product wire harness; a multi-point resistance welding mechanism arranged behind the flattening mechanism for performing multi-point row welding on the product wire harness; a laser welding mechanism arranged behind the multi-point resistance welding mechanism for laser welding the product wire harness after multi-point row welding; and a positioning mechanism provided at each workstation of the conveyor line for precisely positioning the carrier. The present invention utilizes toothed sheet electrodes for multi-point resistance welding, and then adds laser welding to effectively solve the technical problem of welding multiple points together, with high efficiency and stable quality.

Description

Technical Field

[0001] The present invention relates to the field of high-speed wire harness welding, and in particular to a multi-point resistance welding plus laser welding device and process for high-speed wire harness welding. Background Art

[0002] In the high-speed communication connector harness assembly industry, both single resistance welding and laser welding methods fail to meet welding requirements. With single resistance welding, the wire end and the welding handle are typically welded point-to-point, resulting in slow welding speeds and the need to move the welding mechanism piece by piece. This creates complex requirements for the welding mechanism, leading to slow assembly automation efficiency, poor stability, and high production costs. Single laser welding, on the other hand, suffers from quality issues such as unstable welds and incomplete welds due to the lack of contact between the wire end and the welding handle. To address these issues, the present invention combines resistance welding, multi-point welding, and laser welding to achieve high-efficiency, multi-point welding with stable quality. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a multi-point resistance welding plus laser welding device and process for high-speed wire harness welding. Multi-point resistance welding is performed by toothed sheet electrodes, and then laser welding is added to effectively solve the technical problem of welding multiple points together, with high efficiency and stable quality.

[0004] The purpose of the present invention is to achieve the following technical solution: This multi-point resistance welding and laser welding device for high-speed wire harness welding includes:

[0005] The conveyor line includes a synchronous belt and a slide rail arranged parallel to the synchronous belt, and a plurality of workstations are arranged in sequence along the conveyor line;

[0006] A product wiring harness, comprising a plurality of wiring harness groups arranged in sequence;

[0007] The carrier is slidably mounted on the slide rail and driven by a synchronous belt. The carrier is used to clamp and fix the product wiring harness, which is pre-installed with a welding handle;

[0008] The shaping mechanism is located at a station on the conveyor line and is used to shape each harness group of the product harness;

[0009] The flattening mechanism is located at a station on the conveyor line and is arranged behind the shaping mechanism. It is used to flatten the shaped product wire harness to form a flat head.

[0010] The multi-spot resistance welding mechanism is installed at a station on the conveyor line and arranged behind the flattening mechanism. It is used to synchronously perform multi-spot welding on part or all of the flat heads of the product harness, so that the product harness is welded and fixed to the welding handle.

[0011] A laser welding mechanism is installed at a station on the conveyor line and arranged behind the multi-spot resistance welding mechanism, and is used to laser weld the product wire harness after multi-spot welding; and

[0012] The positioning mechanism is installed at each workstation of the conveyor line and is used to accurately position the carrier.

[0013] As a further technical solution, the multi-point resistance welding mechanism includes a mounting plate, an upper power cylinder fixed on the top of the mounting plate, an upper electrode head driven to rise and fall by the upper power cylinder, a lower power cylinder fixed on the bottom of the mounting plate, and a lower electrode head driven to rise and fall by the lower power cylinder. The lower electrode head presses the back of the welding handle under the drive of the lower power cylinder, and the upper electrode head presses the flat head under the drive of the upper power cylinder, so that the upper electrode head, flat head, welding handle and lower electrode head are contacted and pressed in sequence.

[0014] As a further technical solution, the upper electrode head is installed on an upper moving mechanism, which is slidably connected to the mounting plate and driven to rise and fall by an upper power cylinder. The lower electrode head is installed on a lower moving mechanism, which is slidably connected to the mounting plate and driven to rise and fall by a lower power cylinder.

[0015] As a further technical solution, the telescopic rod of the upper power cylinder is connected to the upper moving mechanism through an elastic pressing piece, and the elastic pressing piece applies a pressing force to the upper moving mechanism to ensure that the upper electrode head and the lower electrode head are relatively pressed.

[0016] As a further technical solution, the mounting plate is supported on a horizontal movable platform, the horizontal movable platform is slidably connected to the base plate, and the mounting plate slides horizontally along the base plate under the drive of a horizontal power cylinder.

[0017] As a further technical solution, each positioning mechanism includes a positioning cylinder and a positioning plate connected and driven by the positioning cylinder. When the synchronous belt stops moving, the positioning cylinder drives the positioning plate to embed into the positioning groove on the carrier to achieve precise positioning of the carrier.

[0018] A multi-point resistance welding and laser welding process for high-speed wire harness welding using the above-mentioned equipment comprises the following steps:

[0019] Step 1: Start the conveyor line. The synchronous belt is driven by a servo motor, and the servo motor is set to move the synchronous belt one station distance each time before stopping. The product wiring harness and welding gun are pre-installed on the carrier by the previous process.

[0020] Step 2: Shaping. Each wiring harness group of the product wiring harness is provided with a middle wiring end, a first terminal located on one side of the middle wiring end, and a second terminal located on the other side of the middle wiring end. When the synchronous belt moves a distance of one station and stops, the positioning mechanism corresponding to the shaping mechanism is actuated to precisely position the carrier. Subsequently, the shaping mechanism is actuated to pull the first terminal and the second terminal of the wiring harness group apart relative to the middle wiring end, so that the first terminal of each wiring harness group is pressed against the second terminal of the adjacent wiring harness group to form a combined terminal.

[0021] Step 3: Flattening. After the shaping is completed, the shaping mechanism sends a signal to the servo motor, and the servo motor is started again. When the synchronous belt moves a distance of one station and stops, the positioning mechanism corresponding to the flattening mechanism is activated, so that the positioning cylinder drives the positioning plate to accurately position the carrier. Then the flattening mechanism is activated to flatten the middle wire end and the combined terminal end of the product wire harness to form a flat head.

[0022] Step 4: Resistance welding. After the flattening is completed, the flattening mechanism sends a signal to the servo motor, and the servo motor is started again. When the synchronous belt moves a distance of one station and stops, the positioning mechanism corresponding to the multi-point resistance welding mechanism moves to precisely position the carrier. Subsequently, the multi-point resistance welding mechanism moves to press the upper electrode head and the lower electrode head downward, and synchronously press the welding handle and part or all of the flat heads in the product harness, and then power is turned on for welding;

[0023] Step 5: Laser welding. After resistance welding is completed, the multi-point resistance welding mechanism sends a signal to the servo motor to start the servo motor again. When the synchronous belt stops after moving a distance of one station, the positioning mechanism corresponding to the laser welding mechanism will move to precisely position the carrier, and then the laser welding mechanism will move to laser weld the product wiring harness and welding handle that have undergone resistance welding. After laser welding is completed, the laser welding mechanism sends a signal to the servo motor to start the servo motor again and enter the subsequent process.

[0024] As a further technical solution, the end face of the upper electrode head is a tooth-shaped structure. In the step four, when the upper electrode head and the lower electrode head are pressed down, the raised portion of the tooth-shaped structure contacts and presses the flat head formed by the combined wiring head, and at the same time, the recessed portion of the tooth-shaped structure avoids the flat head formed by the middle wire head, so that the flat head formed by the combined wiring head completes the resistance welding; then, the horizontal power cylinder drives the mounting plate to slide horizontally, fine-tuning the horizontal position of the upper electrode head and the lower electrode head relative to the product wiring harness, and then the upper electrode head and the lower electrode head are pressed down again, so that the raised portion contacts and presses the flat head formed by the middle wire head, and at the same time, the recessed portion avoids the flat head formed by the combined wiring head, that is, the flat head formed by the middle wire head also completes the resistance welding.

[0025] As a further technical solution, in step 4, the pre-pressing time of the upper electrode head and the lower electrode head is 200ms, and the power-on time is 30ms.

[0026] As a further technical solution, in step five, the laser welding speed is 100 mm / s, the jump speed is 300 mm / s, the frequency is 30 KHz, the release time is 0.5 μs, and the power is 180 W.

[0027] The beneficial effects of the present invention are:

[0028] 1. Integrate shaping, flattening, multi-point resistance welding and laser welding on one conveyor line. After resistance welding is completed, laser welding will continue, ensuring reliable welding and product quality.

[0029] 2. With the help of upper and lower electrode heads, multi-point resistance welding can be carried out simultaneously, which increases welding speed, improves production efficiency, and solves the problem of cycle bottleneck in automated equipment;

[0030] 3. The upper electrode head adopts a tooth-shaped structure. For the intermediate wire heads and combined terminal heads (first terminal head and second terminal head) with different wire diameters, two multi-point resistance welding operations can be performed separately to ensure the quality of the welded products.

[0031] 4. The upper and lower electrode heads can fine-tune their horizontal positions under the action of the horizontal power cylinder, thereby adjusting the welding position. There is no need to add an additional resistance welding station, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0033] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0034] Figure 3 for Figure 1 A partial enlarged schematic diagram of area B in the middle.

[0035] Figure 4 Schematic diagram of the structure of the carrier in the present invention.

[0036] Figure 5 This is a schematic diagram of the structure of the product wiring harness before processing.

[0037] Figure 6 This is a schematic diagram of the structure of the product wiring harness after shaping.

[0038] Figure 7 This is a schematic diagram of the structure of the product wiring harness after being flattened.

[0039] Figure 8 for Figure 7 A partial enlarged schematic diagram of the middle C area.

[0040] Figure 9This is a schematic diagram of the structure of the product wiring harness after multi-point resistance welding.

[0041] Figure 10 for Figure 9 A partial enlarged schematic diagram of the D area in the middle.

[0042] Figure 11 This is a schematic diagram of the structure of the product wiring harness after laser welding.

[0043] Figure 12 for Figure 11 A partial enlarged schematic diagram of the E area in the middle.

[0044] Figure 13 Schematic diagram of the three-dimensional structure of the multi-point resistance welding mechanism in the present invention Figure 1 .

[0045] Figure 14 Schematic diagram of the three-dimensional structure of the multi-point resistance welding mechanism in the present invention Figure 2 .

[0046] Figure 15 Schematic diagram of the three-dimensional structure of the multi-point resistance welding mechanism of the present invention (with the carrier hidden).

[0047] Figure 16 It is a structural schematic diagram of the upper and lower electrode heads, the flat head and the welding handle when they are pressed tightly together in the present invention.

[0048] Figure 17 for Figure 16 A partial enlarged schematic diagram of the F area in the middle.

[0049] Figure 18 for Figure 17 A partial enlarged schematic diagram of the middle G area.

[0050] Explanation of the accompanying drawings: conveyor line 100, synchronous belt 101, slide rail 102, carrier 103, positioning groove 104, servo motor 105, product wiring harness 110, wiring harness group 111, intermediate wire head 112, first terminal head 113, second terminal head 114, combined terminal head 115, flat head 116, welding gun 120, shaping mechanism 200, flattening mechanism 300, multi-point resistance welding mechanism 400, lower power cylinder 401, horizontal power cylinder 402, horizontal moving platform 403, elastic pressing part 404, upper power cylinder 405, upper moving mechanism 406, upper electrode head 407, protrusion 4071, recessed portion 4072, lower electrode head 408, lower moving mechanism 409, bottom plate 410, slider rail 411, mounting plate 412, laser welding mechanism 500, positioning mechanism 600, positioning plate 601, positioning cylinder 602. DETAILED DESCRIPTION

[0051] The present invention will be described in detail below with reference to the accompanying drawings:

[0052] Example: As shown in the attached Figures 1 to 18 As shown, the multi-point resistance welding and laser welding device for high-speed wire harness welding includes a conveyor line 100, a synchronous belt 101, a slide rail 102, a carrier 103, a positioning groove 104, a servo motor 105, a product wire harness 110, a wire harness group 111, an intermediate wire head 112, a first terminal head 113, a second terminal head 114, a combined terminal head 115, a flat head 116, a welding handle 120, a shaping mechanism 200, a flattening mechanism 300, and a multi-point resistance welding machine. Structure 400, lower power cylinder 401, horizontal power cylinder 402, horizontal moving platform 403, elastic pressing part 404, upper power cylinder 405, upper moving mechanism 406, upper electrode head 407, protrusion 4071, recessed portion 4072, lower electrode head 408, lower moving mechanism 409, base plate 410, slider rail 411, mounting plate 412, laser welding mechanism 500, positioning mechanism 600, positioning plate 601 and positioning cylinder 602.

[0053] like Figure 1 、 3 As shown, a synchronous belt 101 driven by a servo motor 105 is provided on the conveyor line 100, and a slide rail 102 is provided in parallel with the synchronous belt 101, forming a plurality of processing stations along the left and right sides of the conveyor line 100. Figure 4 A slider is provided at the bottom of the carrier 103 so that it can be slidably mounted on the slide rail 102. In addition, a groove is provided at the bottom of the carrier 103 for engaging the synchronous belt 101, so that the carrier 103 is connected and driven by the synchronous belt 101. The carrier 103 is used to clamp and fix the product harness 110. The welding torch 120 is pre-installed on the product harness 110 in advance by the previous process. Figure 5 As shown, the product wiring harness 110 includes a plurality of wiring harness groups 111 arranged in sequence, each wiring harness group 111 is provided with a middle wire end 112 , a first connection end 113 located on the left side of the middle wire end 112 , and a second connection end 114 located on the right side of the middle wire end 112 .

[0054] Reference Attachment Figure 1 The shaping mechanism 200 is set at one of the workstations of the conveyor line 100 and is used to shape each harness group 111 of the product harness 110. During the shaping process, the first terminal 113 and the second terminal 114 of each harness group 111 are pulled apart relative to the middle terminal 112, so that the first terminal 113 of each harness group 111 and the second terminal 114 of the adjacent harness group 111 are pressed against each other to form a combined terminal 115. The effect after shaping is as follows: Figure 6The flattening mechanism 300 is located on a conveyor line 100 station behind the shaping mechanism 200 and is arranged to flatten the shaped product wire harness 110 (intermediate wire end 112 and combined wire end 115) to form a flat head 116. The effect after flattening is as shown in FIG. Figure 7 、 8 The multi-point resistance welding mechanism 400 is arranged on a conveyor line 100 station behind the flattening mechanism 300, and can simultaneously perform multi-point welding on part or all of the flat heads 116 of the product harness 110, so that the product harness 110 is welded and fixed to the welding handle 120. The effect after multi-point resistance welding is as shown in FIG. Figure 9 、 10 As shown, the flat head 116 is welded to the welding handle 120. Further, the laser welding mechanism 500 is arranged on a conveyor line 100 station behind the multi-point resistance welding mechanism 400, and is used to laser weld the product wire harness 110 after multi-point welding. The effect after laser welding is as shown in FIG. Figure 11 、 12 As shown, several through holes are formed on the flat head 116 due to welding. A positioning mechanism 600 is provided at each workstation of the conveyor line, corresponding one-to-one to the shaping mechanism 200, the flattening mechanism 300, the multi-spot resistance welding mechanism 400, and the laser welding mechanism 500. Each positioning mechanism 600 includes a positioning cylinder 602 and a positioning plate 601 connected and driven by the positioning cylinder 602. Since the servo motor 105 is set to drive the synchronous belt 101 to move the distance of one workstation each time before stopping, when the synchronous belt 101 stops moving, the positioning cylinder 602 begins to drive the positioning plate 601 to embed into the positioning groove 104 on the carrier 103, achieving precise positioning of the carrier 103.

[0055] like Figure 13 、 14 As shown in Figures 15 and 16, the multi-spot resistance welding mechanism 400 includes a mounting plate 412, an upper power cylinder 405 fixed to the top of the mounting plate 412, an upper electrode head 407 driven to rise and fall by the upper power cylinder 405, a lower power cylinder 401 fixed to the bottom of the mounting plate 412, and a lower electrode head 408 driven to rise and fall by the lower power cylinder 401. The upper electrode head 407 is mounted on an upper moving mechanism 406, which is slidably connected to the mounting plate 412 via a slider rail 411 and is driven to rise and fall by the upper power cylinder 405. The lower electrode head 408 is mounted on a lower moving mechanism 409, which is slidably connected to the mounting plate 412 via a slider rail 411 and is driven to rise and fall by the lower power cylinder 401. Figure 18As shown, the lower electrode tip 408 is pressed against the back of the welding handle 120 under the drive of the lower power cylinder 401, and the upper electrode tip 407 is pressed against the flat head 116 under the drive of the upper power cylinder 401, so that the upper electrode tip 407, the flat head 116, the welding handle 120, and the lower electrode tip 408 are sequentially contacted and pressed. Preferably, the telescopic rod of the upper power cylinder 405 is connected to the upper moving mechanism 406 via an elastic pressing member 404. The elastic pressing member 404 applies a pressing force to the upper moving mechanism 406 to ensure that the upper electrode tip 407 and the lower electrode tip 408 are relatively pressed. Furthermore, the mounting plate 412 is supported on the horizontal movable platform 403. The horizontal movable platform 403 is slidably connected to the base plate 410 (supported and fixed by external support members) via a slider rail 411. The mounting plate 412 slides horizontally along the base plate 410 under the drive of the horizontal power cylinder 402.

[0056] Furthermore, a multi-point resistance welding plus laser welding process for high-speed wire harness welding using the above-mentioned equipment comprises the following steps:

[0057] Step 1: Start the conveyor line 100. The synchronous belt 101 is driven by the servo motor 105. The servo motor 105 is set to move the synchronous belt 101 one workstation distance each time before stopping. The product harness 110 and welding torch 120 are pre-installed on the carrier 103 in the previous process.

[0058] Step 2: Shaping. When the synchronous belt 101 moves a distance of one station and stops, the positioning mechanism 600 corresponding to the shaping mechanism 200 is actuated to precisely position the carrier 103. Subsequently, the shaping mechanism 200 is actuated to pull the first terminal 113 and the second terminal 114 of the wiring harness group 111 apart from the middle terminal 112, so that the first terminal 113 of each wiring harness group 111 and the second terminal 114 of the adjacent wiring harness group 111 are pressed against each other to form a combined terminal 115. Figure 6 As shown;

[0059] Step 3: Flattening. After the shaping is completed, the shaping mechanism 200 sends a signal to the servo motor 105, and the servo motor 105 is started again. When the synchronous belt 101 moves a distance of one station and stops, the positioning mechanism 600 corresponding to the flattening mechanism 300 is actuated, so that the positioning cylinder 602 drives the positioning plate 601 to precisely position the carrier 103. Then the flattening mechanism 300 is actuated to flatten the middle wire end 112 and the combined terminal 115 of the product wire harness 110 to form a flat head 116. Figure 7 、 8 As shown, the first terminal 113 on the leftmost side of the product harness 110 and the second terminal 114 on the rightmost side of the product harness 110 are also flattened to form flat heads;

[0060] Step 4: Resistance welding. After the flattening is completed, the flattening mechanism 300 sends a signal to the servo motor 105, and the servo motor 105 is started again. When the synchronous belt 101 moves a distance of one station and stops, the positioning mechanism 600 corresponding to the multi-point resistance welding mechanism 400 is actuated to precisely position the carrier 103. Subsequently, the multi-point resistance welding mechanism 400 is actuated to press down the upper electrode head 407 and the lower electrode head 408, and synchronously press the welding handle 120 and part or all of the flat heads 116 in the product harness 110, and then energize the welding process. Figure 16 、 17 , 18, in actual production, due to the middle thread head 112 (corresponding to Figure 18 The two flat heads 116 on the right side of the middle) and the combined terminal 115 (composed of the first terminal 112 and the second terminal 113, corresponding to Figure 18 The flat head 116 on the left side of the middle part has different wire diameters. If only one multi-point resistance welding is used, the product quality will be affected. Therefore, the lower end surface of the upper electrode head 407 adopts a tooth-shaped structure. When the upper electrode head 407 (toothed sheet electrode) and the lower electrode head 408 (sheet electrode) are pressed down, the protrusion 4071 of the tooth-shaped structure contacts and presses the flat head 116 formed by the combined terminal head 115. At the same time, the concave portion 4072 of the tooth-shaped structure avoids the flat head 116 formed by the middle wire head 112 (with the flat head 116 formed by the middle wire head 112). Figure 18 The flat head 116 formed by the combined terminal head 115 is completed with resistance welding. Subsequently, the horizontal power cylinder 402 drives the mounting plate 412 to slide horizontally, and fine-tunes the horizontal positions of the upper electrode head 407 and the lower electrode head 408 relative to the product wiring harness 110. Then, the upper electrode head 407 and the lower electrode head 408 are pressed down again, so that the protrusion 4071 contacts and presses the flat head 116 formed by the middle terminal head 112, while the recessed portion 4072 avoids the flat head 116 formed by the combined terminal head 115 (with the flat head 116 formed by the combined terminal head 115). Figure 18 The same as shown in FIG), that is, the flat head 116 formed by the middle wire head 112 also completes the resistance welding. Preferably, the pre-pressing time of the upper electrode head 407 and the lower electrode head 408 is 200ms, and the power-on time is 30ms.

[0061] Step 5: Laser Welding. After resistance welding is completed, the multi-point resistance welding mechanism 400 sends a signal to the servo motor 105, restarting the servo motor 105. When the synchronous belt 101 moves one station and stops, the positioning mechanism 600 corresponding to the laser welding mechanism 500 actuates to precisely position the carrier 103. The laser welding mechanism 500 then actuates to laser weld the resistance-welded product harness 110 and welding torch 120. After laser welding is completed, the laser welding mechanism 500 sends a signal to the servo motor 105, restarting the servo motor 105 and entering the subsequent process. Preferably, the laser welding speed is 100 mm / s, the jump speed is 300 mm / s, the frequency is 30 kHz, the release time is 0.5 μs, and the power is 180 W.

[0062] The present invention utilizes a tooth-shaped upper electrode head in conjunction with a lower electrode head to perform multi-point resistance welding of wire ends of different diameters in the product wiring harness in batches. The subsequent addition of laser welding effectively solves the technical problem of welding multiple points together, achieving high efficiency and stable quality. This method avoids the problems of point-to-point welding, such as slow welding speed, the need to move the welding mechanism one by one, and the complex requirements for the welding mechanism, which lead to slow operation of the assembly automatic machine. Compared with traditional point-to-point welding methods, production efficiency is increased by 12 times. Integrating shaping, flattening, multi-point resistance welding, and laser welding on a single conveyor line improves production efficiency and resolves the process's cycle bottleneck in automated equipment.

[0063] It is understandable that for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A multi-point resistance welding and laser welding device for high-speed wire harness welding, characterized by: include A conveyor line (100) includes a synchronous belt (101) and a slide rail (102) arranged parallel to the synchronous belt (101), and a plurality of workstations are sequentially arranged along the conveyor line (100); A product wiring harness (110), comprising a plurality of wiring harness groups (111) arranged in sequence; A carrier (103) is slidably mounted on the slide rail (102) and is connected and driven by a synchronous belt (101), wherein the carrier (103) is used to clamp and fix the product wiring harness (110), and a welding handle (120) is pre-installed on the product wiring harness (110); A shaping mechanism (200) is provided at a station of the conveyor line (100) and is used to shape each wire harness group (111) of the product wire harness (110); A flattening mechanism (300) is provided at a station of the conveyor line (100) and arranged behind the shaping mechanism (200), and is used to flatten the shaped product wire harness (110) to form a flat head (116); A multi-point resistance welding mechanism (400) is provided at a station of the conveyor line (100) and arranged behind the flattening mechanism (300), and is used for synchronously performing multi-point welding on part or all of the flat heads (116) of the product wiring harness (110), so that the product wiring harness (110) and the welding handle (120) are welded and fixed; A laser welding mechanism (500) is provided at a station of the conveyor line (100) and arranged behind the multi-spot resistance welding mechanism (400), and is used to laser weld the product wire harness (110) after multi-spot welding; and The positioning mechanism (600) is provided at each station of the conveyor line and is used for precisely positioning the carrier (103).

2. The multi-point resistance welding and laser welding device for high-speed wire harness welding according to claim 1, characterized in that: The multi-point resistance welding mechanism (400) comprises a mounting plate (412), an upper power cylinder (405) fixed on the top of the mounting plate (412), an upper electrode head (407) driven to rise and fall by the upper power cylinder (405), a lower power cylinder (401) fixed on the bottom of the mounting plate (412), and a lower electrode head (408) driven to rise and fall by the lower power cylinder (401), wherein the lower electrode head (408) is pressed against the back of the welding handle (120) when driven by the lower power cylinder (401), and the upper electrode head (407) is pressed against the flat head (116) when driven by the upper power cylinder (401), so that the upper electrode head (407), the flat head (116), the welding handle (120), and the lower electrode head (408) are contacted and pressed in sequence.

3. The multi-point resistance welding and laser welding device for high-speed wire harness welding according to claim 2, characterized in that: The upper electrode head (407) is mounted on an upper moving mechanism (406), which is slidably connected to a mounting plate (412) and driven to rise and fall by an upper power cylinder (405); the lower electrode head (408) is mounted on a lower moving mechanism (409), which is slidably connected to a mounting plate (412) and driven to rise and fall by a lower power cylinder (401).

4. The multi-point resistance welding and laser welding device for high-speed wire harness welding according to claim 3, characterized in that: The telescopic rod of the upper power cylinder (405) is connected to the upper moving mechanism (406) via an elastic pressing member (404), and the elastic pressing member (404) applies a pressing force to the upper moving mechanism (406) to ensure that the upper electrode head (407) and the lower electrode head (408) are relatively pressed.

5. The multi-point resistance welding and laser welding device for high-speed wire harness welding according to claim 4, characterized in that: The mounting plate (412) is supported on a horizontal movable platform (403), and the horizontal movable platform (403) is slidably connected to the base plate (410). The mounting plate (412) slides horizontally along the base plate (410) under the drive of the horizontal power cylinder (402).

6. The multi-point resistance welding and laser welding device for high-speed wire harness welding according to claim 5, characterized in that: Each positioning mechanism (600) includes a positioning cylinder (602) and a positioning plate (601) connected and driven by the positioning cylinder (602). When the synchronous belt (101) stops moving, the positioning cylinder (602) drives the positioning plate (601) to embed into the positioning groove (104) on the carrier (103), thereby achieving precise positioning of the carrier (103).

7. A multi-point resistance welding plus laser welding process for high-speed wire harness welding, using the multi-point resistance welding plus laser welding device for high-speed wire harness welding according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Start the conveyor line (100), the synchronous belt (101) is driven by the servo motor (105), and the servo motor (105) is set to stop after driving the synchronous belt (101) to move a distance of one station each time; the product harness (110) and the welding handle (120) are pre-installed on the carrier (103) by the previous process; Step 2: Shaping, each wiring harness group (111) of the product wiring harness (110) is provided with an intermediate wiring head (112), a first terminal (113) located on one side of the intermediate wiring head (112), and a second terminal (114) located on the other side of the intermediate wiring head (112); when the synchronous belt (101) moves a distance of one station and stops moving, the positioning mechanism (600) corresponding to the shaping mechanism (200) is actuated to precisely position the carrier (103), and then the shaping mechanism (200) is actuated to pull the first terminal (113) and the second terminal (114) of the wiring harness group (111) apart from the intermediate wiring head (112), so that the first terminal (113) of each wiring harness group (111) and the second terminal (114) of the adjacent wiring harness group (111) are pressed against each other to form a combined terminal (115); Step 3: Flattening. After the shaping is completed, the shaping mechanism (200) sends a signal to the servo motor (105) to start the servo motor (105) again. When the synchronous belt (101) moves a distance of one station and stops moving, the positioning mechanism (600) corresponding to the flattening mechanism (300) is actuated, so that the positioning cylinder (602) drives the positioning plate (601) to precisely position the carrier (103). Then, the flattening mechanism (300) is actuated to flatten the middle wire end (112) and the combined terminal (115) of the product wire harness (110) to form a flat head (116). Step 4: resistance welding. After the flattening is completed, the flattening mechanism (300) sends a signal to the servo motor (105) to start the servo motor (105) again. When the synchronous belt (101) moves a distance of one station and stops moving, the positioning mechanism (600) corresponding to the multi-point resistance welding mechanism (400) is actuated to precisely position the carrier (103). Subsequently, the multi-point resistance welding mechanism (400) is actuated to move the upper electrode head (407) and the lower electrode head (408) toward each other, and the welding handle (120) and part or all of the flat heads (116) in the product harness (110) are synchronously pressed, and then the welding is energized; Step 5: Laser welding. After resistance welding is completed, the multi-point resistance welding mechanism (400) sends a signal to the servo motor (105) to start the servo motor (105) again. When the synchronous belt (101) moves a distance of one station and stops moving, the positioning mechanism (600) corresponding to the laser welding mechanism (500) moves to precisely position the carrier (103). Then, the laser welding mechanism (500) moves to laser weld the resistance-welded product harness (110) and the welding handle (120). After laser welding is completed, the laser welding mechanism (500) sends a signal to the servo motor (105) to start the servo motor (105) again and enter the subsequent process.

8. The multi-point resistance welding plus laser welding process for high-speed wire harness welding according to claim 7, characterized in that: The end face of the upper electrode head (407) is a tooth-shaped structure. In the fourth step, when the upper electrode head (407) and the lower electrode head (408) move toward each other, the raised portion (4071) of the tooth-shaped structure contacts and presses the flat head (116) formed by the combined terminal head (115), and at the same time, the recessed portion (4072) of the tooth-shaped structure avoids the flat head (116) formed by the middle terminal head (112), so that the flat head (116) formed by the combined terminal head (115) completes the resistance welding; then, the horizontal power cylinder (402) drives The movable mounting plate (412) slides horizontally to fine-tune the horizontal positions of the upper electrode head (407) and the lower electrode head (408) relative to the product wiring harness (110). Then, the upper electrode head (407) and the lower electrode head (408) move toward each other again, so that the protrusion (4071) contacts and presses the flat head (116) formed by the middle wire head (112). At the same time, the recessed portion (4072) avoids the flat head (116) formed by the combined wiring head (115), that is, the flat head (116) formed by the middle wire head (112) also completes the resistance welding.

9. The multi-point resistance welding plus laser welding process for high-speed wire harness welding according to claim 8, characterized in that: In step 4, the upper electrode head (407) and the lower electrode head (408) are pre-pressed for 200ms and powered on for 30ms.

10. The multi-point resistance welding plus laser welding process for high-speed wire harness welding according to claim 9, characterized in that: In the step 5, the laser welding speed is 100 mm / s, the jump speed is 300 mm / s, the frequency is 30 KHz, the release time is 0.5 μs, and the power is 180 W.

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