Wire harness terminal laser welding equipment positioned by elastic pre-tightening V-shaped block

Abstract

The invention relates to the technical field of wire harness terminal laser welding, and discloses a wire harness terminal laser welding device positioned by an elastic pre-tightening V-shaped block, which comprises a placing part, the placing part comprises a machine shell, a workbench is placed in the machine shell, one side of the workbench is provided with a rack fixed with the interior of the machine shell, and the rack is provided with an elastic pre-tightening V-shaped block. The rack is in sliding connection with a placement seat through a lifting column arranged on the lower surface of the rack, and a positioning structure used for fixing a wire harness is arranged on the outer surface of the placement seat. The wire harness terminal laser welding equipment capable of achieving positioning through the elastic pre-tightening V-shaped block can effectively solve the problems that in the prior art, due to the fact that wires are prone to deviating and loosening in the welding process of a wire harness, welding point position deviation is caused, most enterprises still complete pin positioning operation mainly through manual work, and the production efficiency is high. And an operator needs to spend a lot of time for observation and adjustment, so that the production cost and the time cost are increased.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology for wire harness terminals, and more specifically to a laser welding device for wire harness terminals with elastic pre-tightened V-block positioning. Background Technology

[0002] Laser welding technology, with its high precision, high efficiency, low deformation, and non-contact processing characteristics, has become one of the core processes in high-end manufacturing. As a key component connecting various electronic components and transmitting signals and energy, wire harnesses are experiencing a surge in demand, leading to increasingly stringent requirements for manufacturing processes and quality. The connection of wire harness terminals is one of the core aspects of wire harness manufacturing, and its quality directly determines the reliability and safety of the entire electrical system.

[0003] In existing technologies, since wire harnesses are mostly composed of multiple wires, wire misalignment and loosening are prone to occur during the welding process, resulting in welding point deviations. Most companies still rely mainly on manual pin positioning, which requires operators to spend a lot of time observing and adjusting, increasing production and time costs. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a laser welding device for wire harness terminals with elastic pre-tightening V-block positioning. This device effectively solves the problem that in existing technologies, since wire harnesses are often composed of multiple wires, wire misalignment and loosening are prone to occur during the welding process, leading to welding point deviations. Furthermore, most companies still rely on manual pin positioning, requiring operators to spend a significant amount of time observing and adjusting, making the entire alignment process time-consuming and increasing production and time costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a laser welding device for wire harness terminals with elastic pre-tightened V-block positioning, comprising:

[0007] The placement part includes a housing, inside which a workbench is placed, and on one side of the workbench is a frame fixed to the inside of the housing. The frame is slidably connected to a placement seat via a lifting column on its lower surface, and the outer surface of the placement seat is provided with a positioning structure for fixing the wire harness.

[0008] The feeding section includes a slide rail plate fixedly connected to the inside of the machine housing. A feeding plate is slidably connected to the side of the slide rail plate near the worktable. A clamping plate for fixing terminals is slidably connected to the upper surface of the feeding plate.

[0009] The laser welding unit includes a robotic arm disposed on one side of the worktable, and a welding gun is connected to the end of the robotic arm.

[0010] Furthermore, the positioning structure includes a second slider, the lower surface of which is fixedly connected to the upper surface of the placement seat. A first slider connected to the upper surface of the placement seat is provided on one side of the second slider, and a third slider connected to the upper surface of the placement seat is provided on the side of the second slider away from the first slider. Multiple third sliders are provided. An adjusting member for adjusting the distance between the first slider, the second slider, and the third slider is provided above the placement seat.

[0011] Furthermore, the adjusting component includes connecting rods, which are provided in several groups, with two connecting rods in each group. The two connecting rods are distributed in a crisscross pattern. The upper surfaces of slider one, slider two, and slider three are all fixedly connected to a rotating shaft, and the middle parts of adjacent connecting rods are rotatably connected through the rotating shaft.

[0012] Furthermore, a cylinder is fixedly connected to the side of the placement seat near the first slider. A through hole is opened inside the first slider. A push-pull rod is slidably connected to the output end of the cylinder. The outer end of the push-pull rod passes through the through hole and is fixedly connected to the outer surface of the second slider.

[0013] Furthermore, each of the sliders 1, 2, and 3 is slidably connected to a vertical rod, the lower end of which is fixedly connected to a positioning block, and a spring connected to the upper surface of the positioning block is sleeved on the outer circumference of the vertical rod.

[0014] Furthermore, a V-shaped groove is formed on the lower surface of the positioning block, a raised mating surface is formed on one side of the positioning block, and a concave mating surface is formed on the side of the positioning block away from the raised mating surface. The raised mating surface of the positioning block can fit into the concave mating surface of the adjacent positioning block.

[0015] Furthermore, the positioning block has a sliding groove inside, and a limiting plate connected to the outer surface of the wire harness is slidably connected inside the sliding groove. A counterweight block is provided inside the limiting plate.

[0016] Furthermore, a separation column is fixedly connected to the outer end of the connecting rod, and the bottom end of the separation column adopts a pointed conical structure design.

[0017] The technical solution provided by this invention has the following advantages compared with the prior art:

[0018] This invention comprises a placement base, an adjusting component, and a positioning structure. Slider 1 is fixed relative to the placement base. A cylinder drives a push-pull rod to move slider 2. Combined with the linkage transmission of the cross link and the rotating shaft, sliders 1, 2, and multiple sliders 3 expand synchronously and equidistantly, causing a limiting plate to evenly separate the attached wires, creating a preset spacing between adjacent wires. The initial positioning requirements for multiple wires when stacked are met simply by ensuring the distance between sliders 1 and 2 equals the diameter of a single wire. During the pre-welding positioning stage, adjusting the cylinder to make the distance between sliders 1 and 2 equal to the distance between two adjacent pins in the terminal allows for synchronous adjustment of all positioning blocks via the linkage structure, ensuring precise matching between the spacing of all adjacent wires and the pin spacing. This avoids the tedious operation of manually adjusting the wire spacing one by one using existing equipment, while ensuring consistent spacing matching. It fundamentally solves the welding defects caused by wire-pin misalignment, improves processing versatility, and can meet the welding operations of various wire harness terminal specifications, expanding the application range of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the laser welding unit, worktable, slide rail plate and frame according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the feeding section in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the frame, lifting column, and placement seat according to an embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional structural diagram of the placement base according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the separation structure of the connecting rod and the rotating shaft according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the positioning structure, connecting rod, rotating shaft, and separation column according to an embodiment of the present invention;

[0027] Figure 8This is a schematic diagram of the positioning block in an embodiment of the present invention;

[0028] Figure 9 This is an embodiment of the present invention. Figure 5 A magnified structural diagram of part A in the middle.

[0029] The labels in the diagram represent: 1. Placement section; 11. Housing; 12. Worktable; 13. Frame; 131. Lifting column; 14. Placement seat; 15. Positioning structure; 151. Slider 1; 152. Slider 2; 153. Slider 3; 154. Vertical rod; 155. Positioning block; 1551. V-groove; 1552. Protruding mating surface; 1553. Concave mating surface; 1554. Slide groove; 156. Spring; 157. Limiting plate; 16. Adjusting component; 161. Connecting rod; 162. Rotating shaft; 163. Cylinder; 164. Push-pull rod; 165. Separating column; 2. Loading section; 21. Slide rail plate; 22. Loading plate; 23. Clamping plate; 3. Laser welding section; 31. Robotic arm; 32. Welding gun. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to embodiments.

[0032] Example:

[0033] Please see Figures 1-9 This invention provides a technical solution: a laser welding device for wire harness terminals with elastic pre-tightened V-block positioning, comprising:

[0034] Placement unit 1 includes housing 11, inside which a workbench 12 is placed, and on one side of the workbench 12 is a frame 13 fixed to the inside of the housing 11. The frame 13 is slidably connected to a placement seat 14 via a lifting column 131 on its lower surface. There are two placement seats 14, and the outer surface of the placement seat 14 is provided with a positioning structure 15 for fixing the wire harness.

[0035] The loading section 2 includes a slide rail plate 21 fixedly connected to the inside of the housing 11. A loading plate 22 is slidably connected to the side of the slide rail plate 21 near the worktable 12. A clamping plate 23 for fixing terminals is slidably connected to the upper surface of the loading plate 22.

[0036] The laser welding unit 3 includes a robotic arm 31 disposed on one side of the worktable 12, and a welding gun 32 is connected to the end of the robotic arm 31.

[0037] The positioning structure 15 includes a second slider 152, the lower surface of which is fixedly connected to the upper surface of the placement seat 14. A first slider 151 connected to the upper surface of the placement seat 14 is provided on one side of the second slider 152. A third slider 153 connected to the upper surface of the placement seat 14 is provided on the side of the second slider 152 away from the first slider 151. Multiple third sliders 153 are provided. An adjusting member 16 for adjusting the distance between the first slider 151, the second slider 152 and the third slider 153 is provided above the placement seat 14.

[0038] The adjusting component 16 includes connecting rods 161, which are provided in several groups. Each group of connecting rods 161 has two connecting rods 161, which are distributed in a cross pattern. The upper surfaces of slider one 151, slider two 152 and slider three 153 are all fixedly connected to rotating shafts 162. The middle parts of adjacent connecting rods 161 are rotatably connected through rotating shafts 162.

[0039] A cylinder 163 is fixedly connected to the side of the placement seat 14 near the slider 151. A through hole is opened inside the slider 151. A push-pull rod 164 is slidably connected to the output end of the cylinder 163. The outer end of the push-pull rod 164 passes through the through hole and is fixedly connected to the outer surface of the slider 152.

[0040] Sliding rods 154 are slidably connected inside slider 151, slider 152 and slider 153. A positioning block 155 is fixedly connected to the lower end of the sliding rod 154. A spring 156 connected to the upper surface of the positioning block 155 is sleeved on the outer circumference of the sliding rod 154.

[0041] A V-groove 1551 is provided on the lower surface of the positioning block 155, a raised mating surface 1552 is formed on one side of the positioning block 155, and a concave mating surface 1553 is formed on the side of the positioning block 155 away from the raised mating surface 1552.

[0042] The positioning block 155 has a sliding groove 1554 inside. There are two sets of sliding grooves 1554, which are symmetrically distributed on both sides of the positioning block 155. Each set of sliding grooves 1554 has multiple sliding grooves. A limiting plate 157 connected to the outer surface of the wire harness is slidably connected inside the sliding groove 1554. A counterweight block is provided inside the limiting plate 157.

[0043] A separation column 165 is fixedly connected to the outer end of the connecting rod 161. The bottom end of the separation column 165 adopts a pointed conical structure design.

[0044] In the initial state:

[0045] In the initial state, all components are in their preset initial positions. In the placement section 1, the lifting column 131 is in a fully retracted state, which drives the placement seat 14 to its highest initial position.

[0046] The wire harness feeding device in the housing 11 moves the neatly stacked multiple wires to the workbench 12. In the initial state, the multiple wires are neatly stacked with their outer surfaces touching each other and located below the placement seat 14.

[0047] In positioning structure 15, cylinder 163 is in its initial retracted state, and push-pull rod 164 drives slider 2 152 to its initial position close to slider 1 151. At this time, the distance between slider 1 151 and slider 2 152 is equal to the horizontal distance between the center lines of two adjacent wires (stacked together), i.e., the diameter of a single wire. Under the action of adjusting component 16, the distance between any two adjacent sliders among slider 1 151, slider 2 152, and multiple sliders 3 153 is consistent, and each wire has a corresponding slider 1 151, slider 2 152, or slider 3 153 above it.

[0048] Since the distance between slider 151, slider 252, and slider 353 is closest at this time, multiple corresponding positioning blocks 155 below slider 151, slider 252, and slider 353 are also in a contracted state. In positioning block 155, its protruding mating surface 1552 will fit against the concave mating surface 1553 in its adjacent positioning block 155, and correspondingly, its concave mating surface 1553 will fit against the protruding mating surface 1552 in another adjacent positioning block 155. The concave-convex locking structure formed in the multiple positioning blocks 155 is in a contracted state.

[0049] The connecting rod 161 is at its initial cross angle, and the separating column 165 at its outer end is in a vertically downward initial state. The separating column 165 adopts a slender cylindrical structure with a tapered design at the lower end. The extension of the bottom end of the separating column 165 is between two adjacent wires. The spring 156 above the positioning block 155 is in a naturally extended state. The vertical rod 154 drives the positioning block 155 to the lowest point within its stroke range relative to the placement seat 14. Under the gravity of the counterweight, the limiting plate 157 slides down along the slide groove 1554 to the lowest position. The lowest points of the limiting plate 157 and the separating column 165 do not contact the outer surface of the wire harness and are at a distance from the upper surface of the worktable 12. In the loading section 2, the loading plate 22 is in an initial position below the slide rail plate 21, and the two clamping plates 23 are in the initial state of maximum spacing. In the laser welding section 3, the robotic arm 31 drives the welding gun 32 to an initial standby position on one side of the worktable 12.

[0050] The positioning and adjustment process of the wire harness:

[0051] The wire harness feeding device moves multiple neatly stacked wires to above the worktable 12. Initially, the wires are neatly stacked with their outer surfaces touching, positioned below the placement seat 14. The axis of the first wire closest to cylinder 163 is in the same vertical plane as the center point of the rotating shaft 162 above slider 151, and subsequent connections are based on this first wire (closest to cylinder 163). The length direction of the wire harness is perpendicular to the arrangement direction of sliders 151, 152, and 153 (i.e., the extension direction of the placement seat 14).

[0052] The lifting column 131 below the starter frame 13 is activated, which drives the placement seat 14 to move downwards. Simultaneously, the placement seat 14 drives the positioning structure 15 and adjusting component 16 on it to move downwards as a whole. Multiple limiting plates 157 are provided. During this process, the positioning block 155 gradually approaches the wire harness as the placement seat 14 moves closer. The limiting plate 157, which is held at its lowest position within the slide groove 1554 under gravity, gradually contacts the outer surface of the wire as it moves downwards. The bottom ends of multiple limiting plates 157 will first contact the outer surface of their respective wires. As the placement seat 14 continues to descend, the weight of the counterweight creates a downward pre-tightening force on the wires at the bottom of the limiting plates 157. Within the positioning block 155, the connecting lines at the bottom ends of multiple limiting plates 157 form an arc shape that is higher in the middle and lower on both sides, ensuring that multiple wires remain flat during subsequent positioning and preventing warping or displacement. At this time, under the gravity of the counterweight, the limiting plate 157 can adaptively conform to the surface of wires of different diameters, playing a role in initial smoothing and axial limiting.

[0053] Since the adjacent positioning blocks 155 are still in a contracted and fitted state at this time, the positioning blocks 155 as a whole have not yet moved to completely cover the top of the wire. When the limiting plate 157 in the positioning block 155 contacts the arc surface of the wire below the adjacent positioning block 155, its contact point only covers one side of the arc surface of the wire and does not contact the highest point of the wire. Therefore, the limiting plate 157 in the positioning block 155 only applies downward pressure to a single wire directly below or to the side below it, without interfering with or restricting adjacent wires, thus creating the necessary space conditions for the subsequent expansion of the distance between the sliders.

[0054] Since the spring 156 is sleeved on the outer surface of the plumb rod 154 and its lower end is connected to the upper surface of the positioning block 155, when the positioning block 155 contacts the wire, the multiple plumb rods 154 slide along the interior of slider one 151, slider two 152 and slider three 153 respectively. The spring 156 is squeezed by the positioning block 155 and generates elastic deformation, forming an elastic preload. This preload is transmitted to the surface of the wire through the positioning block 155, realizing the initial elastic positioning of the wire and avoiding damage to the surface of the wire during the positioning process.

[0055] As the placement seat 14 moves downward, the conical structure at the bottom of the separating column 165 gradually contacts the upper surface of the wire harness. The lifting column 131 continues to descend, and the separating column 165, under the influence of gravity, inserts into the gap between two adjacent wires. Because the separating column 165 uses a conical design, it can effectively separate adhered wires while avoiding damage to the wire insulation. When the conical structure at the bottom of the separating column 165 contacts the upper surface of the worktable 12, the lifting column 131 stops extending, and the placement seat 14 is in the positioning position.

[0056] The cylinder 163 on one side of the placement seat 14 is activated. The cylinder 163 extends and drives the push-pull rod 164 to move horizontally. The outer end of the push-pull rod 164 is fixedly connected to the second slider 152, thus driving the second slider 152 to move away from the first slider 151. Since the upper surfaces of the first slider 151, the second slider 152, and the third slider 153 are all fixed with rotating shafts 162, the middle parts of adjacent connecting rods 161 are rotatably connected through the rotating shafts 162, and each set of connecting rods 161 is crisscrossed. The movement of the second slider 152 drives the first slider 151 and multiple third sliders 153 to move synchronously through the transmission action of the connecting rods 161, so that the distance between adjacent sliders gradually increases.

[0057] During the movement of slider 151 and multiple sliders 3153, the lower vertical rod 154, positioning block 155, and separating column 165 are moved synchronously. As the positioning block 155 moves with the slider, the protruding mating surface 1552 and concave mating surface 1553 of adjacent positioning blocks 155 gradually separate, and the concave-convex engagement structure is released. During this process, the limiting plate 157 inside the positioning block 155 no longer contacts the outer surface of the adjacent wire. In the horizontal distance, the limiting plate 157 whose distance to the center point of the positioning block 155 is greater than the radius of the wire is not restricted, and its bottom end does not contact the outer surface of the wire. Under the action of gravity, its bottom end is always kept in the lowest position along the slide groove 1554. The side of the limiting plate 157 contacts the outer surface of the wire. The multiple limiting plates 157 in each positioning block 155 can surround the corresponding wire, playing an auxiliary limiting role for the wire, preventing the wire from shifting during the separation process, and further improving the positioning accuracy.

[0058] The separating column 165 moves synchronously with the outer end of the connecting rod 161. Due to its conical structure design at the bottom and its initial position extending between two adjacent wires, the separating column 165 remains between two adjacent wires during the movement, gradually separating the wires that are in contact with each other, so that a preset distance is formed between the adjacent wires to meet the subsequent welding requirements.

[0059] Two placement seats 14 are provided, arranged in parallel, with their extension direction perpendicular to the length direction of the wires. Under the action of cylinder 163, the positioning structures 15 on the outer surfaces of the two placement seats 14 move synchronously, thus increasing the distance between adjacent wires in the wire harness. When cylinder 163 is activated, its output thrust is transmitted to slider 152 through push-pull rod 164, driving the positioning structure 15 on one side to expand outward. At the same time, through mechanical linkage or synchronous control system, cylinder 163 on the other placement seat 14 is activated synchronously, driving its corresponding positioning structure 15 to expand outward. This dual-sided synchronous expansion mechanism ensures that the center line of the wire harness remains stable during separation, avoiding overall displacement caused by unilateral force. During the expansion of the positioning structure 15, each positioning block 155 moves outward synchronously and equidistantly along the extension direction of the placement seat 14 under the drive of connecting rod 161. This allows the originally tightly fitted adjacent wires to be stretched parallel and evenly by the corresponding positioning block 155 above them. Each wire, constrained by its own V-groove 1551 and limiting plate 157, translates only in a direction perpendicular to its own axis without twisting or tilting. This ensures that all wires remain parallel to each other after separation, creating ideal geometric conditions for precise alignment and laser welding of subsequent terminals.

[0060] When the distance between adjacent slider 151, slider 2 152 and slider 3 153 reaches the preset value (that is, the distance between adjacent wires meets the welding spacing requirements and is the same as the distance between multiple pins on the outer surface of the terminal), the cylinder 163 stops extending. At this time, the positioning structure 15 completes the elastic pre-tightening positioning of multiple wires. Under the contact positioning of the V-groove 1551, the elastic pre-tightening of the spring 156 and the auxiliary limiting action of the limiting plate 157, each wire maintains a stable posture and preset spacing.

[0061] Terminal feeding and soldering process:

[0062] After the wire harness is positioned, the loading unit 2 begins operation. When the loading plate 22 is at the bottom, the loading device pushes the terminal into its upper surface, and the slide rail 21 drives the loading plate 22 to slide upward to the welding preparation position. The clamping plate 23 clamps the terminal from both sides. At this time, the terminal pins are below the stripped end of the wire harness, and the exposed wire end is in contact with the terminal pins. At this time, the robotic arm 31 starts, moving the welding gun 32 to the welding position. The welding gun 32 emits a laser beam, precisely aiming at the connection point between the terminal and the wire for welding.

[0063] During welding, spring 156 continuously provides elastic preload to ensure the wire remains precisely positioned under thermal stress. Limiting plate 157 and V-groove 1551 restrict radial movement of the wire, and separating post 165 maintains wire spacing; the three work together to ensure welding quality.

[0064] After welding is completed, the robotic arm 31 resets, the clamping plate 23 releases the terminals, and the loading plate 22 descends and resets. The lifting column 131 rises, causing the placement seat 14 to reset, and the positioning block 155 separates from the wire. The cylinder 163 retracts, driving the slider 152 to reset via the push-pull rod 164, reducing the crossing angle of the connecting rod 161, and restoring the spacing between the sliders to their initial state. Finally, the welded wire harness is removed, completing the entire work cycle.

[0065] In summary, the positioning structure 15 has the following advantages:

[0066] Advantage 1: Existing technologies typically use rigid clamps, which are sensitive to wire harness diameter tolerances, easily leading to over-tight positioning that damages the wire or under-tight positioning that causes deviations. This invention, by setting a V-groove 1551 on the positioning block 155 and combining it with a spring 156 sleeved on the vertical rod 154, forms an elastic pre-tightening positioning mechanism. When the positioning block 155 presses down to contact the wire, the spring 156 is compressed, and the top of the vertical rod 154 extends above the slider 151, slider 152, or slider 153. The positioning block 155 generates a continuous and gentle pre-tightening force, causing the inclined surfaces on both sides of the V-groove 1551 to adaptively conform to the circumferential surface of wires of different diameters. This design not only ensures the accuracy of radial positioning but also effectively eliminates positioning errors caused by wire size tolerances, significantly improving compatibility with wire harnesses of different specifications and avoiding wire surface indentations or damage that may be caused by rigid contact.

[0067] Advantage 2: In existing production processes, neatly stacked wire harnesses often stick together due to static electricity or external forces, making effective separation difficult with traditional equipment and resulting in uneven welding spacing. This invention innovatively incorporates a separation post 165 with a pointed conical structure. During the downward movement of the placement seat 14, the tip of the separation post 165 accurately and automatically inserts into the gap between adjacent wires. During the subsequent expansion of the slider, it acts as a physical separator, forcibly and parallelly separating the stuck wires. This active separation mechanism ensures that each wire achieves independent and uniform spacing, providing a reliable prerequisite for precise alignment of terminal pins and high-quality welding, thus solving the welding defects caused by wire harness sticking.

[0068] Thirdly, existing equipment often causes wires to twist or deflect during wire harness separation due to unilateral or uneven force application, affecting subsequent welding accuracy. This invention employs a symmetrically arranged placement seat 14 on both sides, and a cylinder 163 and connecting rod 161 mechanism drive the positioning structures 15 on both sides to expand synchronously and equidistantly. During this process, each wire is constrained by its corresponding V-groove 1551 and limiting plate 157, moving only in a direction perpendicular to its own axis, avoiding twisting and tilting. This synchronous, translational separation method ensures that all wires remain strictly parallel after separation, improving the stability and consistency of positioning.

[0069] Fourthly, the limiting plate 157 of this invention can slide along the inside of the sliding groove 1554 under the gravity of the counterweight, and can adaptively conform to the surface of wires of different diameters, thereby realizing the positioning of wire harnesses of different specifications. The number of sliders 153 is greater than the number of wires in the wire harness, and in conjunction with the linkage adjustment structure of the connecting rod 161, it can meet the separation and positioning requirements of different numbers of wires. Compared with the shortcomings of existing equipment in processing single specifications, this invention significantly improves the processing versatility, can meet the welding operations of wire harness terminals of various specifications, and expands the application range of the equipment.

[0070] Advantage 5: Slider 151 remains stationary. The cylinder 163 drives the push-pull rod 164, which in turn moves slider 152. This, combined with the linkage between the cross link 161 and the rotating shaft 162, allows sliders 151, 152, and multiple sliders 153 to expand synchronously and equidistantly. This, in turn, causes the limiting plate 157 to evenly separate the bonded wires, creating a preset spacing between adjacent wires. Simply ensuring the distance between sliders 151 and 152 equals the diameter of a single wire is sufficient for initial positioning when multiple wires are bonded and stacked. During the pre-welding positioning stage, adjusting the cylinder 163 to make the distance between sliders 151 and 152 equal to the distance between two adjacent pins in the terminal allows for synchronous adjustment of all positioning blocks 155 via the linkage structure, ensuring precise matching between the spacing of all adjacent wires and the pin spacing. It avoids the tedious operation of adjusting the wire spacing one by one with existing equipment, while ensuring the consistency of spacing matching. It fundamentally solves the welding defects caused by the misalignment of wires and pins, improves the versatility of processing, can meet the welding operations of wire harness terminals of various specifications, and expands the application range of the equipment.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser welding device for wire harness terminals with elastic pre-tightened V-block positioning, characterized in that, include: Placement part (1), the placement part (1) includes a housing (11), a workbench (12) is placed inside the housing (11), a frame (13) fixed to the inside of the housing (11) is provided on one side of the workbench (12), the frame (13) is slidably connected to a placement seat (14) by a lifting column (131) provided on its lower surface, and a positioning structure (15) for fixing wire harness is provided on the outer surface of the placement seat (14). The loading section (2) includes a slide rail plate (21) fixedly connected to the inside of the housing (11). The slide rail plate (21) is slidably connected to a loading plate (22) on the side near the worktable (12). The upper surface of the loading plate (22) is slidably connected to a clamping plate (23) for fixing terminals. The laser welding unit (3) includes a robotic arm (31) disposed on one side of the worktable (12), and a welding gun (32) is connected to the end of the robotic arm (31).

2. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 1, characterized in that: The positioning structure (15) includes a second slider (152), the lower surface of which is fixedly connected to the upper surface of the placement seat (14). A first slider (151) connected to the upper surface of the placement seat (14) is provided on one side of the second slider (152). A third slider (153) connected to the upper surface of the placement seat (14) is provided on the side of the second slider (152) away from the first slider (151). Multiple third sliders (153) are provided. An adjusting member (16) for adjusting the distance between the first slider (151), the second slider (152), and the third slider (153) is provided above the placement seat (14).

3. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 2, characterized in that: The adjusting component (16) includes connecting rods (161), which are provided in several groups. Each group of connecting rods (161) has two connecting rods (161), which are distributed in a cross pattern. The upper surfaces of slider one (151), slider two (152) and slider three (153) are all fixedly connected to a rotating shaft (162). The middle parts of adjacent connecting rods (161) are rotatably connected through the rotating shaft (162).

4. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 3, characterized in that: A cylinder (163) is fixedly connected to the side of the placement seat (14) near the slider one (151). A through hole is opened inside the slider one (151). A push-pull rod (164) is slidably connected to the output end of the cylinder (163). The outer end of the push-pull rod (164) passes through the through hole and is fixedly connected to the outer surface of the slider two (152).

5. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 4, characterized in that: The sliders 1 (151), 2 (152) and 3 (153) are all slidably connected with a vertical rod (154). The lower end of the vertical rod (154) is fixedly connected with a positioning block (155). The outer circumference of the vertical rod (154) is fitted with a spring (156) that is connected to the upper surface of the positioning block (155).

6. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 5, characterized in that: The lower surface of the positioning block (155) is provided with a V-shaped groove (1551), a raised mating surface (1552) is formed on one side of the positioning block (155), and a concave mating surface (1553) is formed on the side of the positioning block (155) away from the raised mating surface (1552).

7. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 6, characterized in that: The positioning block (155) has a sliding groove (1554) inside, and a limiting plate (157) connected to the outer surface of the wire harness is slidably connected inside the sliding groove (1554). A counterweight block is provided inside the limiting plate (157).

8. The laser welding equipment for wire harness terminals with elastic pre-tightened V-block positioning according to claim 3, characterized in that: The outer end of the connecting rod (161) is fixedly connected to a separation column (165), and the bottom end of the separation column (165) adopts a pointed cone-shaped structure design.

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