PCBA harness welding tool for vehicle

Abstract

The utility model provides a kind of vehicle PCBA wire harness welding tool applied to welding tool field, including turnover base, turnover base side is equipped with tool block, tool block side is equipped with tool groove and top pressing plate;Guide frame is equipped on base, guide groove is equipped on guide frame, upper slide and lower slide are equipped on turnover base, reset spring is further fixed between the bottom of turnover base and base;Stretching frame is equipped between the bottom of two groups of turnover base, traction groove is equipped on stretching frame, and the bottom of turnover base is equipped with execution slide;The tool block of the application adopts detachable design, different specifications of tool block can be replaced, and various specifications of terminal piece and PCBA wire harness can be adapted, the change type time is greatly shortened, without equipping multiple complete tool, the pretreatment time of single group of components is greatly shortened, combined with subsequent automatic welding, single-day capacity is significantly improved.

Description

Technical Field

[0001] This application relates to the field of welding tooling, and in particular to a welding tooling for automotive PCBA wire harnesses. Background Technology

[0002] In the production process of automotive PCBAs (Printed Circuit Board Assemblies), the soldering of PCBA wire harnesses to terminals is one of the core processes, and its connection quality directly affects the signal transmission stability of automotive electronic systems (such as vehicle control systems and sensor modules). The traditional wire harness soldering methods currently used in the industry have the following significant technical drawbacks, making it difficult to meet the high-precision and high-efficiency production requirements of automotive electronics: Low positioning accuracy and large welding deviation Traditional processes often rely on manual handling to connect terminal components to PCBA wire harnesses, followed by soldering with a soldering gun. Because the contact area between the terminal components (often U-shaped) and the wire harness head is small, manual positioning easily leads to problems such as "terminal misalignment" and "wire harness tilting," resulting in significant coaxiality deviations between the soldered terminals and the wire harness. This necessitates repeated adjustments during subsequent assembly and may even pose a risk of signal transmission interruption. Furthermore, manual operation cannot guarantee the consistency of the solder joints; some solder joints, due to loose connections, are prone to incomplete soldering or detachment in bumpy automotive environments.

[0003] To address the aforementioned issues, there is an urgent need in this field for a welding fixture that can achieve "precise positioning, multi-specification adaptation, and automated pre-processing" in order to overcome the efficiency and quality bottlenecks in automotive PCBA wire harness welding. Utility Model Content

[0004] The purpose of this application is to address the technical problems of low welding efficiency and poor welding quality of existing PCBA wire harness welding fixtures. Compared with the prior art, this application provides a welding fixture for automotive PCBA wire harnesses, including two sets of flip bases symmetrically arranged on a base. Each set of flip bases has a tooling block detachably connected to one side of the opposite side. Each set of tooling blocks has a tooling groove on one side of the opposite side. A top pressure plate is fixed to the top of the tooling groove. The base has two sets of guide frames symmetrically fixed on both sides of the flip base. Each guide frame is provided with a guide groove. An upper slider and a lower slider are fixed on the outer wall of the flip base. The upper slider and the lower slider are slidably connected in the guide groove. A return spring is also fixed between the bottom of the flip base and the base. A tension frame is provided between the bottoms of the two sets of flipping bases. The tension frame is driven by a hydraulic telescopic rod to achieve reciprocating movement in the up and down direction. Two sets of traction grooves are symmetrically provided on both sides of the tension frame. An execution slider is provided at the bottom of each flipping base. The execution slider is slidably connected in the traction groove.

[0005] Furthermore, the reset spring has an elastic force that drives the flip base to move upward away from the base. The guide groove has an L-shaped open groove structure. When the reset spring is in a free state, the flip base moves upward to its maximum stroke. At this time, the upper slider is located at the top of the guide groove, and the lower slider is located at the L-shaped bend node of the guide groove.

[0006] Furthermore, the tooling groove is used to place terminal parts, the terminal parts initially have a U-shaped structure, and a limiting groove for supporting the bottom of the terminal parts is provided on one side of the top of the tooling groove.

[0007] Furthermore, the tooling slot is also provided with a PCBA wire harness, the end of the PCBA wire harness is provided with a wire harness head, the wire harness head is placed in the terminal piece, the U-shaped end of the terminal piece is bent and joined by the top pressure plate to form a weld seam, and the opposite side of the top pressure plate is provided with a welding groove that matches the weld seam.

[0008] Furthermore, an assembly slot is provided on the opposite side of the flip base, and an assembly block is provided on the tooling block that matches the assembly slot. The tooling block is detachably connected to the flip base through the assembly block and the assembly slot, and the welding requirements of different terminal parts and PCBA wire harnesses can be adapted by changing the model of the tooling block.

[0009] Compared to existing technologies, the advantages of this application are: The tooling block of this application adopts a detachable design. By replacing tooling blocks of different specifications, it can be adapted to various specifications of terminal parts and PCBA wire harnesses, which greatly shortens the changeover time, eliminates the need to equip multiple complete tooling sets, and significantly reduces equipment costs.

[0010] Hydraulic drive enables synchronous flipping, docking, and welding, replacing manual hand operation. The pre-processing time for a single component is significantly shortened. Combined with subsequent automated welding, daily production capacity is significantly increased, meeting the needs of large-scale automotive electronics production. At the same time, it reduces manual intervention and lowers the labor intensity of operators. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure before clamping in this application; Figure 2 This is a schematic diagram of the structure after clamping in this application; Figure 3 This is a schematic diagram showing the before and after state of the terminal component after bending, as proposed in this application. Figure 4 This is a schematic diagram of the state of the return spring in its free state. Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle; Figure 6This is a schematic diagram of the exploded structure of this application.

[0012] Explanation of the labels in the diagram: 1. Base; 2. Flip-over base; 21. Upper slider; 22. Lower slider; 23. Actuating slider; 24. Assembly slot; 3. Tooling block; 31. Top pressure plate; 32. Welding slot; 33. Tooling slot; 34. Limiting slot; 35. Assembly block; 4. PCBA wire harness; 41. Wire harness head; 5. Terminal piece; 51. Welding seam; 6. Guide frame; 61. Guide slot; 7. Return spring; 8. Tension frame; 81. Traction slot. Detailed Implementation

[0013] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0014] Example: This utility model provides a welding fixture for automotive PCBA wire harnesses. Please refer to [link / reference]. Figure 1 - Figure 6 The fixture includes a base 1, a flip base 2, a tooling block 3, a guide frame 6, a reset spring 7, and a tension frame 8. The components work together to achieve the positioning, docking, and welding pretreatment of the terminal parts and PCBA wire harnesses. The base 1 is a rectangular steel structure made of welded steel. The bottom is fixed to the workbench by multiple sets of anchor bolts to ensure the overall stability of the fixture.

[0015] Two sets of flip bases 2 are symmetrically arranged on the top of the base 1, and guide frames 6 are fixed on both sides of the flip bases 2 to provide support for the sliding and flipping of the flip bases. It should be noted that the two sets of flip bases 2 are symmetrically arranged on the top of the base 1 to provide a mounting carrier for the tooling block 3, and at the same time, the guide frames 6 enable precise sliding and flipping. The flip base 2 is an L-shaped aluminum alloy component with an upper slider 21 and a lower slider 22 welded to its outer wall. Both are made of low-friction material to reduce sliding resistance. The guide frame 6 is a steel plate bending part with an L-shaped guide groove 61 on the top. The upper slider 21 and the lower slider 22 are slidably connected in the guide groove 61 to restrict the movement trajectory of the flip base 2. A return spring 7 is fixed between the bottom of the flip base 2 and the base 1. The return spring 7 always has the elastic force to drive the flip base 2 to move upward away from the base 1. In the free state, the flip base 2 moves upward to the maximum stroke. At this time, the upper slider 21 is located at the top of the guide groove 61, and the lower slider 22 is located at the L-shaped bending node of the guide groove 61, ensuring that the tooling block 3 is in the open state in the initial state, which is convenient for placing the terminal piece 5. A tension frame 8 is provided between the bottoms of the two sets of flipping bases 2. The tension frame 8 is driven by a hydraulic telescopic rod to move up and down. Inclined traction grooves 81 are symmetrically opened on both sides of the tension frame 8. An execution slider 23 adapted to the traction groove 81 is welded to the bottom of the flipping base 2. The execution slider 23 is slidably connected in the traction groove 81. When the hydraulic telescopic rod drives the tension frame 8 to move down, the traction groove 81 drives the two sets of flipping bases 2 to flip inward synchronously through the execution slider 23 to achieve docking of the tooling block 3. When the hydraulic telescopic rod returns to its original position, the tension frame 8 moves up, and the return spring 7 drives the flipping base 2 to move up and open outward, returning to the initial state.

[0016] Tooling block 3 is the core positioning component for terminal block 5 and PCBA wire harness 4. It adopts a detachable design to adapt to different product specifications. An assembly slot 24 is provided on the opposite side of the flip base 2. An assembly block 35 is integrally formed on the tooling block 3 and is interference-fitted with the assembly slot 24. The tooling block 3 is detachably connected to the flip base 2 via the assembly block 35 and the assembly slot 24. Replacing the tooling block 3 takes less time and greatly reduces the changeover cost. A tooling slot 33 is provided on one side of the tooling block 3 for placing the terminal piece 5; a limiting slot 34 is provided on one side of the top of the tooling slot 33 for supporting the bottom of the terminal piece 5 and preventing the terminal piece from sliding; a top pressure plate 31 is fixed to the top of the tooling slot 33, and a welding slot 32 adapted to the welding seam 51 is provided on one side of the top pressure plate 31. The terminal piece 5 initially has a U-shaped structure, and the wire harness head 41 at the end of the PCBA wire harness 4 is placed inside the terminal piece 5. When the flip base 2 drives the tooling block 3 to flip and connect inward, the top pressure plate 31 presses down on the U-shaped end of the terminal piece 5, causing the terminal piece 5 to bend and tightly connect with the wire harness head 41, forming a regular welding seam 51. The welding groove 32 is precisely matched with the welding seam 51, providing a positioning reference for subsequent welding gun welding and avoiding solder deviation.

[0017] Terminal piece 5 is initially U-shaped and is placed in tooling groove 33. Its bottom is supported and positioned by limiting groove 34 to prevent lateral displacement. After the wires are stripped, the wire harness head 41 at the end of the PCBA wire harness 4 is placed in the U-shaped groove of the terminal piece 5. The depth and width of the tooling groove 33 ensure that the coaxiality deviation between the wire harness head 41 and the terminal piece 5 is small. With the synchronous flipping of the base 2 and the positioning of the tooling block 3, the contact area deviation between the terminal piece 5 and the wire harness head 41 after bending is small, and the straightness of the weld seam 51 is high, laying the foundation for high-quality welding.

[0018] This application utilizes a mechanical structure to replace manual operation through "hydraulic-driven synchronous flipping + detachable positioning + weld seam pretreatment" to achieve precise docking and stable fixation of terminal components and PCBA wire harnesses. The specific process is as follows: 1. Initial state: The fixture is open, ready for loading. The hydraulic telescopic rod is in the extended state, the tensioning frame 8 is at the highest position, the return spring 7 drives the flip base 2 to move up to the maximum stroke, the upper slider 21 is at the top of the guide groove 61, the lower slider 22 is at the L-shaped bending node, and the two sets of tooling blocks 3 are in the open state; the operator selects the appropriate tooling block 3 according to the specifications of the terminal 5 and the PCBA wire harness 4, and installs it onto the flip base 2 through the assembly card block 35 and the assembly card slot 24.

[0019] 2. Workpiece placement: Precise positioning

[0020] Place the U-shaped terminal 5 into the tooling groove 33, and embed the bottom of the terminal 5 into the limiting groove 34 to achieve lateral positioning; strip the wires from the wire harness head 41 of the PCBA wire harness 4 and place it into the U-shaped groove of the terminal 5 to ensure that the wire harness head 41 is aligned with the axis of the terminal 5.

[0021] 3. Synchronous flipping: Butt joint and welding pretreatment

[0022] The hydraulic system is activated, and the hydraulic telescopic rod drives the tension frame 8 to move downward. The traction groove 81 of the tension frame 8 drives the two sets of flipping bases 2 to move inward synchronously through the actuator slider 23: the upper slider 21 slides downward along the guide groove 61, and the lower slider 22 slides from the L-shaped bending node along the horizontal section, and the flipping bases 2 gradually flip inward. When the tension frame 8 moves down to its maximum stroke, the two sets of tooling blocks 3 are fully connected, and the top pressure plate 31 presses down on the U-shaped end of the terminal piece 5, causing the terminal piece 5 to bend and tightly wrap the wire harness head 41, forming a regular weld seam 51. The weld seam 51 is embedded in the welding groove 32 of the top pressure plate 31, completing the welding pretreatment. At this time, the hydraulic system maintains pressure to ensure close contact between the terminal piece and the wire harness head. At this time, the welding torch welds along the reference reserved in the welding groove 32 to complete the final connection.

[0023] 4. Reset and remove parts: Prepare for welding.

[0024] The hydraulic telescopic rod resets, the tensioning frame 8 moves upward, the reset spring 7 drives the flipping base 2 to move upward, the upper slider 21 and the lower slider 22 return to the initial position along the guide groove 61, and the two sets of tooling blocks 3 open; the operator takes out the terminal piece 5 and PCBA wire harness 4 that have been docked and welded, and completes the welding operation.

[0025] The tooling block 3 of this application adopts a detachable design. By replacing the tooling block 3 of different specifications, it can be adapted to various specifications of terminal parts 5 and PCBA wire harnesses 4, which greatly shortens the changeover time, eliminates the need to equip multiple complete tooling sets, and significantly reduces equipment costs.

[0026] Hydraulic drive enables synchronous flipping, docking, and welding, replacing manual hand operation. The pre-processing time for a single component is significantly shortened. Combined with subsequent automated welding, daily production capacity is significantly increased, meeting the needs of large-scale automotive electronics production. At the same time, it reduces manual intervention and lowers the labor intensity of operators.

[0027] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A welding fixture for automotive PCBA wire harnesses, comprising two sets of flip bases (2) symmetrically arranged on a base (1), characterized in that, Both sets of the flip bases (2) are detachably connected to tooling blocks (3) on opposite sides. Both sets of tooling blocks (3) are provided with tooling grooves (33) on opposite sides. A top pressure plate (31) is fixed to the top of the tooling grooves (33). The base (1) has two sets of guide frames (6) symmetrically fixed on both sides of the flip base (2). Each guide frame (6) is provided with a guide groove (61). The outer wall of the flip base (2) is fixed with an upper slider (21) and a lower slider (22). The upper slider (21) and the lower slider (22) are slidably connected in the guide groove (61). A reset spring (7) is also fixed between the bottom of the flip base (2) and the base (1). A tension frame (8) is provided between the bottoms of the two sets of flip bases (2). The tension frame (8) is driven by a hydraulic telescopic rod to achieve reciprocating motion in the up and down direction. Two sets of traction grooves (81) are symmetrically provided on both sides of the tension frame (8). An execution slider (23) is provided at the bottom of each flip base (2). The execution slider (23) is slidably connected in the traction groove (81).

2. The automotive PCBA wire harness welding fixture according to claim 1, characterized in that, The reset spring (7) has an elastic force that drives the flip base (2) to move upward away from the base (1). The guide groove (61) has an L-shaped open groove structure. When the reset spring (7) is in a free state, the flip base (2) moves upward to the maximum stroke. At this time, the upper slider (21) is located at the top of the guide groove (61), and the lower slider (22) is located at the L-shaped bend node of the guide groove (61).

3. The automotive PCBA wire harness welding fixture according to claim 1, characterized in that, The tooling groove (33) is used to place the terminal piece (5). The terminal piece (5) is initially U-shaped. A limiting groove (34) is provided on the top side of the tooling groove (33) to support the bottom of the terminal piece (5).

4. The automotive PCBA wire harness welding fixture according to claim 3, characterized in that, The tooling slot (33) is also provided with a PCBA wire harness (4). The end of the PCBA wire harness (4) is provided with a wire harness head (41). The wire harness head (41) is placed in the terminal piece (5). The U-shaped end of the terminal piece (5) is bent and connected by the top pressure plate (31) to form a weld seam (51). The opposite side of the top pressure plate (31) is provided with a welding groove (32) that matches the weld seam (51).

5. The automotive PCBA wire harness welding fixture according to claim 1, characterized in that, The flip base (2) has an assembly slot (24) on one side opposite to it. The tooling block (3) has an assembly block (35) that matches the assembly slot (24). The tooling block (3) is detachably connected to the flip base (2) through the assembly block (35) and the assembly slot (24). By changing the model of the tooling block (3), it can adapt to the welding requirements of different terminal parts (5) and PCBA wire harnesses (4).

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