An ultrasonic welding device and method based on wire harness branching

Abstract

This invention belongs to the field of automotive wiring harness manufacturing technology, specifically relating to an ultrasonic welding device and method based on wiring harness splitting. The welding device includes a first base, an ultrasonic component, a splitting mechanism, and a clamping mechanism. A bottom mold is mounted on the first base, and a contour groove is provided on the bottom mold, within which a terminal is installed. The ultrasonic component includes an ultrasonic welding head and is positioned directly opposite the bottom mold. The splitting mechanism is used to sequentially and spaced out multiple strands of the same cable, so that the single strand to be welded is located in the middle, with the gap between it and the strands on both sides greater than the width of the terminal. The clamping mechanism is used to clamp the single strand to be welded, so that the strand abuts against the corresponding terminal. This invention limits the multiple strands of the same cable by using the splitting mechanism and the clamping mechanism, and sequentially performs ultrasonic welding with the corresponding terminals, effectively avoiding the problem of multiple strands of the same cable being connected to the same terminal, which would render the cable unusable.

Description

Technical Field

[0001] This invention belongs to the field of automotive wiring harness manufacturing technology, specifically relating to an ultrasonic welding device and method based on wiring harness branching. Background Technology

[0002] In recent years, with the deepening development of the environmental protection economy, people's awareness of safety and environmental protection has become increasingly strong. Especially in the automotive industry, environmental protection, economy, and performance reliability are increasingly pursued goals. Automotive wiring harnesses are the main network of automotive circuits, playing a crucial role. As automotive manufacturing places increasingly higher demands on automotive parts, crimping and welding in wiring harness manufacturing have revealed many drawbacks, such as: high contact resistance after crimping; insufficient mechanical strength after crimping necessitating further spot welding; low production efficiency; and the need for flux and solder for spot welding, resulting in high resistance at the weld point and a tendency for incomplete welds.

[0003] Ultrasonic metal welding, as a new and advanced welding technology, utilizes frequency-modulated vibration transmitted to two metal surfaces to be welded. Under pressure, the two metal surfaces rub against each other in a solid state, forming a fusion between molecular layers, thus achieving the welding effect. Its numerous advantages have led to its widespread application in automotive wiring harnesses, especially in export wiring harnesses and automobiles.

[0004] Automotive wiring or circuit conductors can be single-strand wires, multi-strand wires, or printed circuits. Single-strand wires have a solid metal core and are typically used in components such as alternators, motors, electrical appliances, and other devices. Multi-strand wires have a core composed of many smaller strands twisted together to form a single conductor. Most wiring in automotive electrical systems consists of multi-strand wires, which can be single wires or combinations thereof. All wiring is color-coded on the insulation, either in a solid color or with colored stripes for identification. Printed circuits are thin films of copper or other conductors printed onto an insulator backing. Printed circuits are sandwiched between two sheets of plastic to provide greater protection and flexibility. A printed circuit board is a complete printed circuit consisting of connectors for conductors, insulation, and other components. In space-constrained locations, such as behind the dashboard, printed circuits are used instead of individual wires or harnesses.

[0005] In the practical application of ultrasonic welding of multi-strand wire harnesses, the inventors have discovered at least the following technical problems: On the one hand, when ultrasonically welding multi-strand wire harnesses for automobiles, because the multi-strand wire harnesses extend into the welding machine at the same time, when ultrasonically welding the wire harnesses to the terminals, the welding machine's sensors detect the wire harnesses and make misjudgments, affecting the production cycle; on the other hand, when ultrasonically welding multi-strand wire harnesses for automobiles, the welding machine's misjudgments cause the entire multi-strand wire harness to be scrapped and cannot be used, resulting in product scrapping and economic losses.

[0006] Therefore, it is necessary to improve the existing technology to overcome its shortcomings in practical applications. Summary of the Invention

[0007] Based on the aforementioned shortcomings and deficiencies in the prior art, one of the objectives of this invention is to at least solve one or more of the aforementioned problems in the prior art. In other words, one of the objectives of this invention is to provide an ultrasonic welding apparatus and method based on wire harness splitting that meets one or more of the aforementioned requirements.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0009] This invention provides an ultrasonic welding device based on wire harness splitting, comprising:

[0010] A first base, on which a bottom mold is installed, the bottom mold having a contour groove, and terminals installed in the contour groove;

[0011] An ultrasonic component includes an ultrasonic welding head, which is positioned directly opposite the bottom mold.

[0012] A wire splitting mechanism, mounted on the first base, is used to sequentially arrange multiple strands of the same cable at intervals, so that the single strand to be welded is located in the middle, and the interval between it and the strands on both sides is greater than the width of the terminal; and

[0013] A wire clamping mechanism is provided corresponding to the wire splitting mechanism. The wire clamping mechanism is used to clamp the single strand wire bundle to be welded so that the single strand wire bundle to be welded abuts against the corresponding terminal.

[0014] The single-strand wire harness to be welded is ultrasonically welded to the corresponding terminal using an ultrasonic welding head. After the welding is completed, the wire harness and terminal are replaced, and the unwelded wire harness in the splitting mechanism is connected to the corresponding terminal in sequence. The replaced wire harness and terminal are then ultrasonically welded using an ultrasonic welding head.

[0015] As a preferred embodiment, the wire splitting mechanism includes several wire splitting grooves, which are arranged sequentially at intervals. The width of each wire splitting groove is greater than the width of the wire bundle, so as to separate and distribute the multiple wire bundles.

[0016] As a preferred embodiment, the wire clamping mechanism includes a second base, a drive cylinder, and a clamping assembly. The clamping assembly is mounted on the drive cylinder, and the drive cylinder is mounted on the second base. The clamping assembly is driven to move horizontally by the drive cylinder, and the clamping assembly clamps the wire harness so that the wire harness is aligned with the terminal.

[0017] As a preferred embodiment, the clamping assembly includes a first clamping block and a second clamping block, the first clamping block and the second clamping block being slidably connected to the driving cylinder respectively; the driving cylinder drives the first clamping block and the second clamping block to move closer or further away, thereby limiting the wire harness or replacing the wire harness.

[0018] As a preferred embodiment, the first clamping block and the second clamping block each have a pressing part and a clearance part, the pressing part being used to abut against the outer edge of the welding wire harness, and the clearance part being used to support the wire harness.

[0019] As a preferred embodiment, the position between the first base and the second base is adjustable.

[0020] As a preferred embodiment, a support block is installed on the second base, and the support block is slidably engaged with the second base so that the position of the support block in the vertical direction is adjustable, and the support block is used to support the wire harness.

[0021] As a preferred embodiment, the device also includes a frame on which a left stop and a right stop are mounted. The left stop and the right stop respectively abut against both sides of the terminal, and a limiting portion is formed between the left stop and the right stop. A wire harness is installed in the limiting portion.

[0022] The present invention also provides an ultrasonic welding method based on wire harness splitting, comprising the following steps:

[0023] S10. Place the terminal in the contour groove, and abut the left and right sides of the terminal by the left and right stops respectively;

[0024] S20. Install the multi-strand wire harness of the same cable into the wire clamping mechanism, and use the wire splitting mechanism to abut the single-strand wire harness to be welded onto the corresponding terminal.

[0025] S30. The single-strand wire harness to be welded is ultrasonically welded to the corresponding terminal using an ultrasonic welding head. After the welding is completed, the wire harness and terminal are replaced, and the unwelded wire harness in the splitting mechanism is connected to the corresponding terminal in sequence. The replaced wire harness and terminal are ultrasonically welded using an ultrasonic welding head.

[0026] As a preferred embodiment, the multiple strands of the same cable are fixed by a shielding ring, and the shielding ring distributes the welding ends of the multiple strands of the cable through the splitting mechanism.

[0027] Compared with the prior art, the beneficial effects of this invention are:

[0028] The present invention provides an ultrasonic welding device based on wire harness splitting. The device limits the multiple strands of the same cable by means of a splitting mechanism and a clamping mechanism, and then performs ultrasonic welding with the corresponding terminals in sequence. This avoids the multiple strands of the same cable being welded to the same terminal, effectively avoids sensor misjudgment of the welding equipment, and allows the subsequent welding process to proceed smoothly.

[0029] The present invention provides an ultrasonic welding device based on wire harness splitting. The wire clamping mechanism is adjusted according to the length and width of the wire harness, which can keep the welding position of the wire harness flush during welding and effectively improve the applicability of wire harness welding. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the ultrasonic welding device according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the ultrasonic welding apparatus according to an embodiment of the present invention from another perspective;

[0033] Figure 3 This is a schematic diagram of the wire clamping mechanism according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the first clamping block according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection between the clamping mechanism and the wire harness according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the connection between the wire splitting mechanism and the wire harness according to an embodiment of the present invention;

[0037] In the diagram: 1 First base, 11 Bottom mold, 12 Contouring groove, 2 Wire clamping mechanism, 21 Second base, 22 Clamping assembly, 221 First clamping block, 222 Second clamping block, 223 Pressing part, 224 Clearance part, 23 Drive cylinder, 24 Support block, 3 Wire splitting mechanism, 31 Wire splitting groove, 4 Ultrasonic assembly, 41 Ultrasonic welding head, 42 Amplitude modulator, 43 Transducer, 5 Frame, 51 Left stop block, 52 Right stop block, 54 Crossbeam, 55 Floating joint, 56 Connecting plate, 6 Shielding ring, A terminal, B wire harness. Detailed Implementation

[0038] To more clearly illustrate the embodiments of the present invention, specific implementation methods will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0039] In the description of the embodiments of the present invention, terms such as "upper," "lower," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, terms such as "first" and "second" are used only for distinction in description and have no special meaning.

[0040] Ultrasonic metal welding utilizes frequency-modulated vibration transmitted to two metal surfaces to be welded. Under pressure, the two metal surfaces rub against each other in a solid state, forming a fusion between molecular layers, thus achieving the welding effect. Ultrasonic metal welding is increasingly widely used in automotive wiring harnesses, especially in export wiring harnesses and automotive wiring harnesses.

[0041] In automotive wiring harnesses, to reduce resistance and increase fusion strength, multiple strands of wire harnesses are typically connected into a cable using shielding rings. Each strand of wire harness is then connected to its corresponding terminal. The connection between the terminal and the wire harness requires ultrasonic welding technology.

[0042] Because the connection gaps between multiple wire harnesses are small, each wire harness needs to be pulled out and clamped and fixed before ultrasonic welding to prevent the welding position from shifting during ultrasonic welding, which would result in an unreliable weld.

[0043] During ultrasonic welding, the ultrasonic welding head can only weld one wire harness to one terminal at a time. To avoid multiple wire harnesses getting tangled together or welding multiple wire harnesses to a single terminal, the multiple wire harnesses need to be processed separately and then welded to their corresponding terminals sequentially. If multiple wire harnesses are welded to a single terminal, the internal circuitry of the wire harness is easily damaged, leading to a short circuit. This renders the entire cable connected to the shielding ring unusable, wasting cable materials.

[0044] To address the aforementioned issues, the applicant conducted further research and proposed an ultrasonic welding device based on wire harness splitting to separate multiple wire harnesses and sequentially weld them to corresponding terminals.

[0045] According to some embodiments of this application, please refer to Figures 1 to 6An ultrasonic welding device based on wire harness splitting is provided, including a first base 1, a wire clamping mechanism 2, a wire splitting mechanism 3, and an ultrasonic component 4. The wire clamping mechanism 2 clamps and fixes multiple wire harnesses, and the wire splitting mechanism 3 separates the multiple wire harnesses. The ultrasonic component 4 performs ultrasonic welding on the single wire harness to be welded and its corresponding terminal. After welding is completed, the wire harness and terminal are replaced, and the unwelded wire harness in the wire splitting mechanism 3 is sequentially connected to the corresponding terminal. The ultrasonic component 4 then performs ultrasonic welding on the replaced wire harness and terminal.

[0046] Specifically, a bottom mold 11 is installed on the first base 1. The bottom mold 11 is provided with a contour groove 12. A terminal A is installed in the contour groove 12. The terminal A and the wire harness B are formed by ultrasonic welding. The contour groove 12 can be set according to the structural shape of the terminal and can be replaced to adapt to the welding of different terminals.

[0047] Furthermore, a wire splitting mechanism 3 is installed on the front side of the first base 1. The wire splitting mechanism 3 is used to arrange the multiple strands of the same cable in a staggered manner so that the single strand to be welded is located in the middle position and the interval between it and the wires on both sides is greater than the width of the terminal. This can prevent the multiple strands from being connected to the same terminal or from crossing between the multiple strands.

[0048] The wire splitting mechanism 3 is a toothed tooling. The wire splitting mechanism 3 includes several wire splitting grooves 31. The several wire splitting grooves 31 are arranged in sequence at intervals. Multiple wire bundles are placed through the multiple wire splitting grooves 31 respectively. The groove width of the wire splitting groove 31 is greater than the wire width of the wire bundle, so as to separate and distribute the multiple wire bundles.

[0049] Since the two ends of the multi-strand wire harness of the same cable are connected by shielding rings 6 respectively, when the multi-strand wire harness is placed in different distribution slots 31, the single-strand wire harness to be welded is placed in the middle distribution slot and abuts against the corresponding terminal. The remaining wire harnesses are distributed in the distribution slots on both sides of the wire harness to be welded and can maintain a certain distance from the terminal to be welded, so as to reserve the welding position for the single-strand wire harness to be welded, so as to avoid the multi-strand wire harness abutting against a terminal or the multi-strand wire harnesses getting tangled together, which would affect the welding process between the wire harness and the terminal.

[0050] Before ultrasonic welding, after matching each wire harness with its corresponding terminal, it needs to be detected by a sensor. On one hand, the sensor detects whether the gap between the single wire harness to be welded and the wire harnesses on both sides is less than the width of the terminal, and whether there are any intersections between multiple wire harnesses. If any of these situations occur, the sensor will determine that the installation is abnormal, and ultrasonic welding cannot proceed normally. On the other hand, the sensor detects whether the single wire harness to be welded is in the welding position, thus avoiding sensor misjudgment that could affect the orderly and smooth progress of subsequent welding processes, helping to reduce or even eliminate losses caused by welding misjudgment.

[0051] According to some embodiments of this application, the ultrasonic component 4 includes a transducer 43, an amplitude modulator 42, and an ultrasonic welding head 41. The transducer 43 is connected to the amplitude modulator 42, the amplitude modulator 42 is connected to the ultrasonic welding head 41, and the ultrasonic welding head 41 is arranged facing the bottom mold 11. The ultrasonic welding head 41 is used to perform ultrasonic welding on the wire harness and terminals located on the bottom mold 11.

[0052] According to some embodiments of this application, the wire clamping mechanism 2 and the wire splitting mechanism 3 are arranged correspondingly. The wire clamping mechanism 2 is used to clamp the single-strand wire harness to be welded so that the single-strand wire harness to be welded abuts against the corresponding terminal. The single-strand wire harness to be welded is ultrasonically welded to the corresponding terminal by an ultrasonic welding head. After the welding is formed, the wire harness and the terminal are replaced, and different terminals are alternately moved to the welding position. The unwelded wire harness in the wire splitting mechanism is then abutted against the corresponding terminal in sequence. The replaced wire harness and the terminal are ultrasonically welded by an ultrasonic welding head.

[0053] Specifically, the wire clamping mechanism 2 includes a second base 21, a drive cylinder 23, and a clamping assembly 22. The clamping assembly 22 is mounted on the drive cylinder 23, and the drive cylinder 23 is mounted on the second base 21. The clamping assembly 22 is driven to move horizontally by the drive cylinder 23, and the clamping assembly 22 clamps the wire harness so that the wire harness is arranged in accordance with the terminal.

[0054] The clamping assembly 22 includes a first clamping block 221 and a second clamping block 222, which are slidably connected to the drive cylinder 23. The drive cylinder 23 drives the first clamping block 221 and the second clamping block 222 to move closer or further away, so as to limit the wire harness or replace the wire harness.

[0055] Specifically, the drive cylinder 23 includes a cylinder body, a guide rail, and a gripper. The gripper is slidably connected to the guide rail. The first clamping block 221 engages with the gripper, and the second clamping block 222 engages with the gripper. The first clamping block 221 and the second clamping block 222 are slidably engaged. The cylinder body drives the gripper to slide along the guide rail, thereby moving the first clamping block 221 and the second clamping block 222 closer to or further away from each other. This allows the gap between the first clamping block 221 and the second clamping block 222 to be adjusted to clamp wire harnesses of different widths.

[0056] Furthermore, the first clamping block 221 and the second clamping block 222 have the same structure. The first clamping block 221 and the second clamping block 222 are respectively provided with screw holes. They are fixed to the pneumatic gripper by installing bolts or screws in the screw holes to fix and position the first clamping block and the second clamping block.

[0057] According to some embodiments of this application, the first clamping block 221 and the second clamping block 222 respectively have a crimping portion 223 and a clearance portion 224. The crimping portion 223 is used to abut against the outer edge of the welding wire harness, and the clearance portion 224 is used to support the wire harnesses on both sides of the wire harness to be welded.

[0058] The first clamping block 221 and / or the second clamping block 222 each have two crimping parts 223. The two crimping parts 223 are arranged opposite to each other and abut against the upper outer edge of the wire harness to be welded. When ultrasonic welding is performed on the wire harness and the terminal, the ultrasonic vibration is transmitted to the surface of the wire harness. The outer edge of the wire harness is limited by the two crimping parts 223 to prevent the wire harness from moving up and down in the vertical direction, thereby improving the limiting effect on the wire harness.

[0059] As the first clamping block 221 and the second clamping block 222 move relative to each other, the clearance portion 224 will also change. In other words, the clearance portion 224 will change as the first clamping block 221 and the second clamping block 222 move closer or further apart, so as to accommodate wire harnesses of different widths.

[0060] In order to maintain the consistency of the welding position of the wire harness and avoid the front and rear ends of the wire harness from tilting, according to some embodiments of this application, a support block 24 is installed on the second base 21. The support block 24 is slidably engaged with the second base 21 so that the position of the support block 24 in the vertical direction can be adjusted. The support block 24 supports the wire harness so that the rear end of the wire harness is flush with the welding end.

[0061] Furthermore, the support block 24 is detachably connected to the side wall of the second base 21 via a locking member. The position and height of the support block 24 can be adjusted according to the outer diameter of the wire harness to accommodate wire harnesses of different outer diameters, so that the front end of the wire harness and the welding end are kept at the same height.

[0062] By adjusting the height of the upper surface of the support block 25 relative to the wire harness support position, on the one hand, the vertical height of the rear end and the front end of the wire harness can be kept consistent, avoiding tilting caused by inconsistent heights of the front and rear ends of the wire harness; on the other hand, when the outer diameter of the replaced wire harness increases or decreases, adjusting the height of the support block 25 can adapt to wire harnesses of different thicknesses.

[0063] According to some embodiments of this application, the position between the second base 21 and the first base 1 is adjustable, and the front and rear positions between the wire clamping mechanism 2 and the first base 1 can be adjusted according to the length of different wire harnesses to adapt to support wire harnesses of different lengths, so that the front and rear ends of the wire harness remain horizontal.

[0064] According to some embodiments of this application, it also includes a frame 5, with a drive unit provided on the top of the frame 5. The drive unit can be configured as a cylinder, an electric cylinder, or a servo motor. The output end of the drive unit is connected to a floating joint 55. The floating joint 55 is connected to a crossbeam 54. Connecting blocks 56 are symmetrically installed on both sides of the crossbeam 54. The two connecting blocks are respectively matched with a left stop block 51 and a right stop block 52. The left stop block 51 and the right stop block 52 are symmetrically arranged and are respectively matched with the connecting blocks 56 through a wedge structure. This is used to convert the up-and-down movement of the connecting blocks 56 into the left-and-right movement of the left stop block 51 and the right stop block 52. The left stop block 51 and the right stop block 53 are respectively used to press the left and right sides of the terminal to fix the terminal A to be welded.

[0065] Specifically, the left stop 51 and the right stop 52 abut against the left and right sides of terminal A, respectively, forming a limiting part between the left stop 51 and the right stop 52. A wire harness is installed within this limiting part. The limiting part positions the wire harness, and its width corresponds to the width of the wire harness, allowing for adjustment based on the wire harness width. During use, the ultrasonic welding head is pressed down against the limiting part, activating ultrasonic vibration to perform ultrasonic welding between the wire harness and the terminal.

[0066] According to some embodiments of this application, when ultrasonically welding multi-strand wire harnesses to terminals, the multi-strand wire harnesses are separated by a wire splitting mechanism and a wire clamping mechanism and then welded to the corresponding terminals in sequence. The sensor detects that the wire harnesses can be welded normally, avoiding sensor misjudgment caused by the cross-entanglement of multi-strand wire harnesses, which would render the entire multi-strand wire harness unusable.

[0067] According to some embodiments of this application, an ultrasonic welding method based on wire harness splitting is also provided, employing the welding apparatus described above, and including the following steps:

[0068] S10. Place the terminal in the contour groove, and drive the crossbeam downward through the drive component so that the left and right stops abut against the left and right sides of the terminal respectively; wherein the left and right stops are located on both sides of the ultrasonic welding head respectively.

[0069] S20. Install the multi-strand wire harness of the same cable in the wire clamping mechanism, and use the wire splitting mechanism to abut the single-strand wire harness to be welded to the corresponding terminal.

[0070] S30. Use an ultrasonic welding head to perform ultrasonic welding on the single-strand wire harness to be welded and the corresponding terminal. After the welding is completed, replace the wire harness and the terminal, and then connect the unwelded wire harness in the splitting mechanism to the corresponding terminal in sequence. Use an ultrasonic welding head to perform ultrasonic welding on the replaced wire harness and the terminal. Repeat this process to complete the welding of multiple wire harnesses of the same cable to the corresponding terminals.

[0071] In this process, multiple strands of wires in the same cable are fixed by a shielding ring, and the shielding ring distributes the soldered ends of the multiple strands of wires through a splitting mechanism.

[0072] The above description is merely a detailed explanation of preferred embodiments and principles of the present invention. For those skilled in the art, there may be changes in specific implementation methods based on the ideas provided by the present invention, and these changes should also be considered within the scope of protection of the present invention.

Claims

1. An ultrasonic welding device based on wire harness splitting, characterized in that, include: A first base, on which a bottom mold is installed, the bottom mold having a contour groove, and terminals installed in the contour groove; An ultrasonic component includes an ultrasonic welding head, which is positioned directly opposite the bottom mold. The wire splitting mechanism, a toothed fixture mounted on the first base, includes several sequentially spaced wire splitting grooves, the groove width of which is greater than the wire harness width. The mechanism is used to sequentially and spacedly arrange multiple strands of the same cable, so that the single strand to be welded is located in the middle, and the distance between it and the strands on either side is greater than the width of the terminal. The multiple strands of the same cable are fixed by a shielding ring, which distributes the welding ends of the multiple strands through the wire splitting mechanism. A wire clamping mechanism is arranged corresponding to the wire splitting mechanism. The wire clamping mechanism includes a second base, a drive cylinder, and a clamping assembly. The clamping assembly includes a first clamping block and a second clamping block. The first clamping block and the second clamping block respectively have a pressing part and a clearance part. The pressing part clamps the outer edge of the single strand wire harness to be welded, and the clearance part supports the unwelded wire harnesses on both sides so that the single strand wire harness to be welded abuts against the corresponding terminal. The first clamping block and the second clamping block are slidably connected to the driving cylinder; the driving cylinder drives the first clamping block and the second clamping block to move closer or further away, so as to limit the wire harness or replace the wire harness. The relative movement of the first clamping block and the second clamping block causes the clearance part to move, so as to adapt to support wire harnesses of different widths; A support block is installed on the second base. The support block slides with the second base so that the position of the support block in the vertical direction can be adjusted. By adjusting the height of the upper surface of the support block relative to the wire harness support position, it can be adapted to wire harnesses of different widths. The single-strand wire harness to be welded is ultrasonically welded to the corresponding terminal using an ultrasonic welding head. After the welding is completed, the wire harness and terminal are replaced, and the unwelded wire harness in the splitting mechanism is connected to the corresponding terminal in sequence. The replaced wire harness and terminal are then ultrasonically welded using an ultrasonic welding head.

2. The ultrasonic welding device based on wire harness splitting according to claim 1, characterized in that, The clamping assembly is mounted on the drive cylinder, which is mounted on the second base. The drive cylinder drives the clamping assembly to move horizontally, and the clamping assembly clamps the wire harness so that the wire harness is aligned with the terminal.

3. The ultrasonic welding device based on wire harness splitting according to claim 2, characterized in that, The position between the first base and the second base is adjustable.

4. The ultrasonic welding device based on wire harness splitting according to claim 1, characterized in that, It also includes a frame on which a left stop and a right stop are mounted. The left stop and the right stop respectively abut against the two sides of the terminal. A limiting part is formed between the left stop and the right stop, and a wire harness is installed in the limiting part.

5. An ultrasonic welding method based on wire harness splitting, characterized in that, The method using the ultrasonic welding apparatus as described in claim 4 includes the following steps: S10. Place the terminal in the contour groove, and abut the left and right sides of the terminal by the left and right stops respectively; S20. Install the multi-strand wire harness of the same cable into the wire clamping mechanism, and use the wire splitting mechanism to abut the single-strand wire harness to be welded onto the corresponding terminal. S30. The single-strand wire harness to be welded is ultrasonically welded to the corresponding terminal using an ultrasonic welding head. After the welding is completed, the wire harness and terminal are replaced, and the unwelded wire harness in the splitting mechanism is connected to the corresponding terminal in sequence. The replaced wire harness and terminal are ultrasonically welded using an ultrasonic welding head.

6. The ultrasonic welding method based on wire harness splitting according to claim 5, characterized in that, The multiple strands of the same cable are fixed by a shielding ring, and the shielding ring distributes the soldered ends of the multiple strands of the cable through the splitting mechanism.

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