A new ultrasonic welding tool

Abstract

The utility model discloses a novel ultrasonic welding tool, including device main part, the device main part top is connected with motion platform through head portion trigger avoidance air cylinder, install the adjusting assembly for adjusting wire clamp space position on this motion platform, install wire harness clamping and carrying mechanism on the adjusting assembly, the terminal of wire harness clamping and carrying mechanism is wire clamp below, is provided with electrically conductive detection mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of ultrasonic welding technology, and more specifically, it relates to a novel ultrasonic welding fixture. Background Technology

[0002] During ultrasonic welding, the terminal needs to be fixed on the felt first, then the wire harness (cable) is placed on top of the terminal, and then ultrasonic welding is used.

[0003] Traditionally, the method for positioning wire harnesses (cables) relative to terminals involves placing the cable on the terminal and relying on pre-set relative position limits between the terminal and the cable to constrain the position of the wire harness (cable) and achieve relative positioning. The drawbacks of this method are: it requires first starting the fixture to fix the terminal, then placing the cable, and then starting the equipment again for soldering, requiring two equipment starts. This results in: 1. low efficiency; 2. soldering failure due to missing the first start; 3. during the placement of the wire harness (cable), if the operator and equipment do not coordinate properly, the relative position of the wire harness (cable) may shift, causing soldering failure. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel ultrasonic welding fixture, which can automatically and accurately constrain the relative position of wire harnesses and terminals, and integrates an online detection function for wire harness stripping status. This device can effectively improve crimping quality, production efficiency, and operational reliability, while reducing the skill requirements for operators.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel ultrasonic welding fixture, comprising a device body, a motion platform connected to the top of the device body via a head-triggered avoidance cylinder, an adjustment component for adjusting the spatial position of the wire clamp mounted on the motion platform, a wire harness clamping and transporting mechanism mounted on the adjustment component; and a conductivity detection mechanism provided at the end of the wire harness clamping and transporting mechanism, i.e. below the wire clamp.

[0006] The adjustment assembly includes a front-to-back moving adjustment plate, an angle adjustment plate, and a left-to-right moving adjustment plate connected sequentially from bottom to top. The front-to-back moving adjustment plate is connected to the motion platform. The wire harness clamping and transporting mechanism is mounted on the left-to-right moving adjustment plate.

[0007] The wire harness clamping and handling mechanism includes a wire clamp cylinder mounted on a left and right movable adjustment plate. The output end of the wire clamp cylinder is connected to a wire clamp front and rear cylinder that can move back and forth. The wire clamp is installed at the output end of the wire clamp front and rear cylinder. The upper and lower wire clamp cylinders are installed on the surface of the wire clamp front and rear cylinders. The output end of the upper and lower wire clamp cylinders is provided with a wire support.

[0008] The conductivity detection mechanism includes a mounting base made of non-conductive material and fixed to the main body of the device. The mounting base is fitted with mutually insulated metal plates with 0V+ voltage and 0V- voltage, and the positions of the metal plates with 0V+ voltage and 0V- voltage are directly opposite to the final position where the wire clamp places the wire harness.

[0009] Preferably, the left slider and the right slider are respectively adjusted and locked to the main body by the left slider gap adjusting screw and the right slider gap adjusting screw.

[0010] Preferably, a head limiter is provided on one side of the motion platform to limit its travel.

[0011] Preferably, a base felt is installed at the bottom of the main body of the device.

[0012] Preferably, a forward adjustment screw is installed on the front-to-back moving adjustment plate, and a right-side adjustment screw is installed on the left-to-right moving adjustment plate, for fine-tuning the final position of the cable clamp in the front-to-back and left-to-right directions.

[0013] Preferably, a centering clamp is fixedly connected to one side of the clamp.

[0014] Preferably, a contour clamping mechanism is installed on the left slider.

[0015] This utility model provides a novel ultrasonic welding fixture, which has the following beneficial effects:

[0016] 1. High precision and high reliability: Through precise mechanical mechanisms (slider, adjusting screw, limit block) and the repeatability of the cylinder, the relative position of the wire harness and the terminal is strictly constrained, which fundamentally guarantees the crimping quality.

[0017] 2. High efficiency: Automated handling and integrated motion processes reduce manual intervention and individual equipment start signals, significantly shortening the time for a single operation.

[0018] 3. Effective error prevention function: The innovative non-contact (for wire harnesses) conductivity detection method simultaneously verifies the two key indicators of "stripping" and "placement" during the handling process, achieving 100% online detection and preventing defective products from leaving the site.

[0019] 4. Low operating requirements and low maintenance costs: Operators only need to perform simple loading and unloading actions, without the need for complex skill training. The device has a simple structure, mainly composed of mechanical parts and standard cylinders, without expensive sensors or consumables that require frequent replacement, making maintenance simple and inexpensive. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a top view of the structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0023] In the diagram: 1. Front and rear adjustment screw; 2. Right side stop; 3. Base felt; 4. Right side slider; 5. Right side stop gap adjustment screw; 6. Main body of the device; 7. Head trigger avoidance cylinder; 8. Front and rear movement adjustment plate; 9. Angle adjustment plate; 10. Left and right movement adjustment plate; 11. Wire clamp cylinder; 12. Wire clamp up and down cylinder; 13. Wire clamp front and rear cylinder; 14. Wire support; 15. Wire clamp; 16. Centering wire clamp; 17. Left side stop gap adjustment screw; 18. Left side slider; 19. Left side stop; 20. Contouring part clamping mechanism; 21. Head limiter; 22. Metal sheet with 0V+ voltage; 23. Mounting base; 24. Metal sheet with 0V- voltage. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0025] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figures 1 to 3This utility model provides a technical solution: a novel ultrasonic welding fixture, comprising a main body 6, which serves as a mounting base and support platform. A base felt 3 is installed at the bottom of the main body 6 for shock absorption and protection of the worktable. Precision guide rails are machined on the main body 6 for mounting the left slider 18 and the right slider 4. These two sliders can be finely adjusted using the left stop gap adjusting screw 17 and the right stop gap adjusting screw 5 to eliminate assembly gaps and ensure smooth and accurate movement. A contour clamping mechanism 20 is fixedly mounted on the left slider 18 for contour positioning and clamping according to the shape of a specific terminal.

[0028] Above the main body 6 of the device, a motion platform is connected to and driven by a head-triggered avoidance cylinder 7. A head limiter 21 is provided on one side of the motion platform to limit its travel. This motion platform serves as the mounting base for the wire harness handling system. A multi-degree-of-freedom adjustment assembly is installed on the motion platform to precisely define the final working position of the wire clamp.

[0029] The adjustment assembly includes: a front-to-back moving adjustment plate 8, and a front-to-back adjusting screw 1, which allows for coarse and fine adjustments in the front-to-back direction.

[0030] Angle adjustment plate 9 is installed on the front and rear moving adjustment plate 8 and is used to adjust the angle of the wire clamp mechanism.

[0031] The left-right adjustment plate 10 is mounted on the angle adjustment plate 9, and coarse and fine adjustments in the left and right directions can be made via the adjusting screw on the right side. The wire harness clamping and handling mechanism is mounted on the top of this adjustment assembly—the left-right adjustment plate 10. This mechanism includes:

[0032] The wire clamp lifting cylinder 12 drives the entire clamping part to move vertically up and down. The wire clamp front and rear cylinders 13 are installed at the output end of the wire clamp lifting cylinder 12 and drive the clamping part to move back and forth.

[0033] The wire clamp 15 is installed at the output end of the front and rear cylinders 13 for directly clamping the wire harness. A centering wire clamp 16 may also be provided next to it for auxiliary positioning. The surface of the front and rear cylinders 13 is equipped with a wire clamp upper and lower cylinder 12, and the output end of the upper and lower cylinder 12 is provided with a wire support 14.

[0034] The wire support 14 is installed near the wire clamp 15 to support the wire harness during the transfer process and prevent it from sagging.

[0035] Through this combination of cylinders and adjustment plates, the wire clamp can perform precise and repeatable complex movements in space, accurately transporting the wire harness from the pick-up position to the predetermined station above the terminal.

[0036] At the final placement station of the wire harness, a conductivity detection mechanism is provided. This mechanism includes a mounting base 23 made of a non-conductive material (such as engineering plastics, bakelite, etc.), which is fixed to the main body. The mounting base 23 contains two mutually insulated metal plates: a metal plate 22 with a 0V+ voltage and a metal plate 24 with a 0V- voltage. These two metal plates are respectively connected to the positive and negative terminals of a low-voltage detection circuit (such as a 5V or 24V DC signal circuit). Their mounting positions are precisely designed to ensure that when the wire harness is correctly placed, its exposed core wires can reliably contact both metal plates simultaneously.

[0037] The specific usage and function of this embodiment are as follows:

[0038] Pre-positioning and terminal fixing: The operator first places the terminal into the contour clamping mechanism 20 for pre-positioning and clamping. This process avoids the need for direct cooperation between the operator and subsequent automated equipment.

[0039] Automated wire harness handling and alignment: After the equipment is started, the 11 sets of wire clamp cylinders operate according to a preset program, driving the wire clamps to grab the wire harness and guide it precisely to the predetermined position above the terminal through a series of adjustment plates. This process is entirely completed by the mechanism, avoiding positioning inaccuracies caused by manual placement, and integrating multiple actions of the wire clamps into a single equipment start-up, reducing the number of equipment starts and improving efficiency.

[0040] Stripping status and placement detection: When the wire harness is placed to its final position, its exposed core wires will simultaneously contact the metal plate 22 with 0V+ voltage and the metal plate 24 with 0V- voltage.

[0041] If the wire harness has been properly stripped: the core wire acts as a conductor, connecting the circuit between the two metal plates. The detection circuit sends a "ready" signal, allowing the equipment to proceed with the next crimping operation. This process utilizes the conductivity of the wire harness to effectively determine the stripping status.

[0042] If the wire harness is not stripped of its insulation: the insulation separates the two metal plates, preventing circuit continuity. The detection system identifies this as an anomaly, immediately triggering an alarm or halting equipment operation to prevent defective products. This solves the problem of unstripped wire harnesses being undetectable.

[0043] If the wire harness is not placed correctly: even if the insulation has been stripped, if the core wires do not simultaneously contact both metal plates, the circuit will not conduct, and the system will determine that the placement is incorrect. This function automatically detects the correct placement, requiring minimal visual inspection from the operator.

[0044] Welding execution: After receiving the "ready" signal, the welding machine (not shown in the figure) performs the welding action to complete the job.

[0045] In practice, operators simply place the terminals into the conformal clamp and tighten them, then place the wire harness into the clamp or designated loading position. After starting the equipment, subsequent actions such as gripping, handling, inspection, and crimping are all completed automatically. The detection circuit can be connected to the equipment's PLC control system, determining whether to perform crimping or trigger an alarm based on the conduction signal. The adjusting screws can be used for fine-tuning during equipment commissioning to accommodate different terminal and wire harness models.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel ultrasonic welding fixture, comprising a main body (6), characterized in that: The main body (6) of the device is connected to a motion platform via a head-triggered avoidance cylinder (7). An adjustment component for adjusting the spatial position of the wire clamp is installed on the motion platform. A wire harness clamping and transporting mechanism is installed on the adjustment component. A conductivity detection mechanism is provided at the end of the wire harness clamping and transporting mechanism, that is, below the wire clamp. The adjustment assembly includes a front-to-back moving adjustment plate (8), an angle adjustment plate (9), and a left-to-right moving adjustment plate (10) connected sequentially from bottom to top. The front-to-back moving adjustment plate (8) is connected to the motion platform. The wire harness clamping and transporting mechanism is mounted on the left-to-right moving adjustment plate (10). The wire harness clamping and handling mechanism includes a wire clamp cylinder (11) mounted on a left and right movable adjustment plate (10). The output end of the wire clamp cylinder (11) is connected to a wire clamp front and rear cylinder (13) that can move back and forth. A wire clamp (15) is installed at the output end of the wire clamp front and rear cylinder (13). A wire clamp upper and lower cylinder (12) is installed on the surface of the wire clamp front and rear cylinder (13). A wire support (14) is provided at the output end of the wire clamp upper and lower cylinder (12). The conductivity detection mechanism includes a mounting base (23) made of non-conductive material and fixed on the main body (6) of the device. The mounting base (23) is fitted with a metal sheet (22) with 0V+ voltage and a metal sheet (24) with 0V- voltage that are insulated from each other. The positions of the metal sheet (22) with 0V+ voltage and the metal sheet (24) with 0V- voltage are directly opposite to the final position where the wire clamp (15) places the wire harness.

2. The novel ultrasonic welding fixture according to claim 1, characterized in that: The left stop (19) and the right stop (2) are respectively adjusted and locked to the main body (6) by the left stop gap adjustment screw (17), the left slider (18) and the right stop gap adjustment screw (5), the right slider (4).

3. The novel ultrasonic welding fixture according to claim 1, characterized in that: The motion platform is provided with a head limiter (21) on one side to limit its travel.

4. The novel ultrasonic welding fixture according to claim 1, characterized in that: A base felt (3) is installed at the bottom of the main body (6) of the device.

5. A novel ultrasonic welding fixture according to claim 1, characterized in that: The front and rear moving adjustment plate (8) is equipped with a front and rear adjusting screw (1), and the left and right moving adjustment plate (10) is equipped with a right adjusting screw, which is used to fine adjust the final position of the wire clamp (15) in the front and rear and left and right directions.

6. The novel ultrasonic welding fixture according to claim 1, characterized in that: The clamp (15) is provided with a centering clamp (16) fixedly connected on one side.

7. A novel ultrasonic welding fixture according to claim 2, characterized in that: A profile clamping mechanism (20) is installed on the left slider (18).

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