A method for vertically welding multiple wire harnesses

Abstract

The present invention discloses a reflow soldering fixture and a method for vertically soldering multiple wire harnesses. The fixture includes a wire inserting tooling, a wire harness locking mechanism, a wire harness limiting base, and a furnace loading carrier. The wire inserting tooling is provided with longitudinal jacks, and the jacks are provided with longitudinal openings; the wire harness locking mechanism includes a first clamping arm and a second clamping arm, and a plurality of longitudinal ridges are provided on the opposite sides of the first clamping arm and the second clamping arm, and the ridges correspond to the openings; the wire harness limiting base is used to fix and position the relative positions of the wire inserting tooling and the wire harness locking mechanism. The soldering method uses the above fixture to carry the PCB circuit board to be soldered and the wire inserting tooling fixed with the external wire harness into the reflow soldering equipment for solder joint soldering. The method for vertically soldering multiple wire harnesses can vertically solder multiple wire harnesses on the PCB circuit board simultaneously.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness soldering on circuit boards, and particularly to a reflow soldering fixture and a method for vertically soldering multiple wire harnesses. Background Art

[0002] Automotive electrical components often involve vertically soldering multiple wire harnesses on the surface of a PCB circuit board (such as the wire harness soldering of an automotive vanity mirror circuit board). The traditional operation is to manually use a soldering gun to solder each wire harness one by one. During soldering, manual positioning of the wire harness is carried out. During positioning, the solder pad often needs to be rotated or the wire harness needs to be tilted for calibration. This soldering method is not only slow but also prone to connection deviations between the solder pads and the wire harnesses, reducing the soldering quality. Reflow soldering is an efficient soldering method. First, multiple components are pasted and fixed on the circuit board, and then heated air or nitrogen is blown onto the circuit board to melt the solder around the components to achieve one-time soldering of multiple components. However, the wire harness is soft and difficult to be vertically bonded and fixed on the circuit board, so it is impossible to achieve one-time vertical soldering of multiple wire harnesses through reflow soldering. Summary of the Invention

[0003] An object of the present invention is to provide a reflow soldering fixture that can accurately fix multiple wire harnesses on a circuit board for convenient reflow soldering.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A reflow soldering fixture includes a furnace carrier, and also includes a wire inserting tooling, a wire harness locking mechanism, and a wire harness limiting base.

[0006] A plurality of vertically through holes are sequentially provided on the wire inserting tooling. The holes correspond to the wire harness soldering positions on the PCB circuit board to be soldered. A vertical opening is provided on one side of the hole.

[0007] The wire harness locking mechanism includes a first clamping arm and a second clamping arm. A plurality of longitudinal ridges are provided on the opposite sides of the first clamping arm and the second clamping arm. The ridges correspond to the opening. The first clamping arm and the second clamping arm can be clamped on the wire inserting tooling, and the ridges enter the hole from the opening to clamp the wire harness.

[0008] The wire harness limiting base is used to position the wire inserting tooling and the wire harness locking mechanism. A second positioning post is provided on the bottom side of the wire inserting tooling, and a second positioning hole corresponding to the second positioning post is provided on the wire harness limiting base. A third positioning post is provided at the bottom of the wire harness locking mechanism, and a third positioning hole corresponding to the third positioning post is provided on the wire harness limiting base.

[0009] The upper surface of the furnace passing carrier is provided with a positioning groove, and the positioning groove is conformable to the PCB circuit board to be welded; on the furnace passing carrier, there are also a sixth positioning hole for cooperating with the second positioning post and a seventh positioning hole for cooperating with the third positioning post.

[0010] Preferably, one ends of the first clamping arm and the second clamping arm are rotatably arranged on the positioning block, and the other ends of the first clamping arm and the second clamping arm are provided with a locking mechanism, and the locking mechanism includes a hook arranged on the first clamping arm and a locking member arranged on the second clamping arm.

[0011] Preferably, a first positioning post is arranged on the side wall of the wire inserting tooling away from the positioning block, and corresponding first positioning holes are arranged on the first clamping arm and the second clamping arm.

[0012] Preferably, a first magnet is further arranged on the bottom side of the wire inserting tooling, and corresponding second magnets are respectively arranged on the furnace passing carrier and the wire harness limiting base; a third magnet is arranged at the bottom side of the positioning block in a staggered manner, and corresponding fourth magnets are respectively arranged on the furnace passing carrier and the wire harness limiting base; the second magnets and the fourth magnets are arranged on the lower surface of the furnace passing carrier; the second magnets and the fourth magnets are arranged on the upper surface of the wire harness limiting base.

[0013] Preferably, the third positioning post is arranged at the bottom of the positioning block in a staggered manner.

[0014] Preferably, a groove is further arranged on the wire harness limiting base, and the groove corresponds to the jack.

[0015] Preferably, a fourth positioning post for fixing the PCB circuit board to be welded is arranged in the positioning groove, a notch is arranged on the edge of the positioning groove, and a ventilation hole is arranged at the bottom of the positioning groove; a fifth positioning hole is further arranged on the edge of the furnace passing carrier.

[0016] Preferably, the wire inserting tooling includes a first support, a second support and a wire inserting part, the jacks are arranged along the edge of the wire inserting part, and the first support and the second support support the wire inserting part to be suspended above the positioning groove.

[0017] In the above technical solution, the fixture includes a wire insertion tooling, a wire harness locking mechanism, a wire harness limiting base, and a furnace passing carrier. The wire insertion tooling keeps the wire harness in a vertical state. The wire insertion tooling and the wire harness locking mechanism are positioned on the wire harness limiting base to fix their relative positions, so as to ensure that the wire harness is clamped and fixed on the wire insertion tooling without displacement or deformation. Then, the locked-together wire insertion tooling and wire harness locking mechanism are moved to the furnace passing carrier and positioned, so that the vertical wire harness is moved to the furnace passing carrier and the PCB board and the wire harness are kept in a stable state during the process, making the end of the wire harness correspond to and contact the solder joints of the PCB board. Then, the furnace passing carrier carrying the PCB board and the wire harness enters the reflow soldering equipment for solder joint welding. In this way, the welding of multiple wire harness solder joints can be completed simultaneously. Compared with the method of manually welding the wire harnesses vertically one by one in the prior art, using this fixture for welding can accurately fix multiple wire harnesses and make them correspond to and contact the wire harness welding positions on the PCB board, so that the reflow soldering equipment can be used for welding.

[0018] Another object of the present invention is to provide a method for vertically welding multiple wire harnesses, which can accurately vertically weld multiple wire harnesses on a PCB board simultaneously.

[0019] To achieve the above object, the present invention adopts the following technical solutions:

[0020] A method for vertically welding multiple wire harnesses, using the reflow soldering fixture in the above technical solution, and performing welding on a reflow soldering equipment, specifically including the following steps:

[0021] Step 1: Position the wire insertion tooling on the wire harness limiting base, vertically insert the wire harness into the jack of the wire insertion tooling, and make the bottom end of the wire harness contact the wire harness limiting base;

[0022] Step 2: Position the wire harness locking mechanism on the wire harness limiting base, and make the first clamping arm and the second clamping arm clamp on both sides of the wire insertion tooling, and the convex strip enters the jack to clamp the wire harness, and then lock the wire harness locking mechanism;

[0023] Step 3: Remove the locked-together wire harness locking mechanism and wire insertion tooling from the wire harness limiting base for standby;

[0024] Step 4: Place the PCB board to be welded in the positioning groove of the furnace passing carrier, with the side of the PCB board to be welded with the wire harness facing upward;

[0025] Step 5: Position the locked-together wire harness locking mechanism and wire insertion tooling in Step 3 on the furnace passing carrier;

[0026] Step 6: Open the wire harness locking mechanism to separate the first clamping arm and the second clamping arm from the wire inserting tooling, and then remove the wire harness locking mechanism from the furnace passing carrier;

[0027] Step 7: Place the furnace passing carrier carrying the PCB circuit board to be welded and the wire inserting tooling into the reflow soldering equipment for soldering;

[0028] Step 8: After soldering is completed, remove and recycle the wire inserting tooling and the furnace passing carrier for cyclic use.

[0029] Preferably, before placing the furnace passing carrier into the reflow soldering equipment in Step 7, confirm that the bottom ends of the wire harnesses correspond to and are in contact with the wire harness soldering positions on the PCB circuit board to be welded one by one.

[0030] In the above technical solution, first, the wire inserting tooling is used to fix and position the wire harness, and then the wire harness is clamped in the wire inserting tooling through the wire harness locking mechanism, so as to ensure that when the wire harness is moved to the furnace passing carrier, it can correspond to the solder joint positions on the PCB circuit board to be welded. Then, the reflow soldering equipment can be used for soldering, and the accurate positioning contact between the end of the wire harness and the solder joint positions on the PCB circuit board to be welded is ensured, realizing the automated operation of vertical soldering of multiple wire harnesses. In addition, the use of the wire harness locking mechanism and the wire harness limiting base can fix and position the wire harness in an offline manner, so that it can be carried out simultaneously with the installation process of other electronic components on the PCB circuit board, without affecting the speed of the automated production line of the PCB circuit board as a whole, and at the same time, the accuracy of wire insertion can be ensured. Description of the Drawings <s

[0031] Figure 1 It is a schematic diagram of the positioning of the wire inserting tooling and the wire harness locking mechanism of the present invention on the furnace passing carrier;

[0032] Figure 2 It is a three-dimensional structure schematic diagram of the furnace passing carrier of the present invention;

[0033] Figure 3 It is a bottom view of the furnace passing carrier of the present invention;

[0034] Figure 4 It is a three-dimensional structure schematic diagram of the wire inserting tooling of the present invention;

[0035] Figure 5 It is a side view of the wire inserting tooling of the present invention;

[0036] Figure 6 It is a structure schematic diagram of the wire harness locking mechanism in the open state of the present invention;

[0037] Figure 7 It is a bottom view of the wire harness locking mechanism in the locked state of the present invention;

[0038] Figure 8 Structural schematic diagram of the wire harness limiting base in the present invention;

[0039] Figure 9 Structural schematic diagram of the wire inserting tooling in the present invention positioned on the wire harness limiting base;

[0040] Figure 10 Schematic diagram of the wire inserting tooling and the wire harness locking mechanism in the present invention positioned on the wire harness limiting base;

[0041] Figure 11 Schematic diagram of the pad structure including multiple circuit boards.

[0042] In the figure, 1 is the wire inserting tooling; 11 is the jack; 12 is the opening; 13 is the first positioning post; 14 is the second positioning post; 15 is the first magnet; 16 is the first support; 17 is the second support; 18 is the wire inserting part; 19 is the through hole; 2 is the wire harness locking mechanism; 21 is the rib; 22 is the first positioning hole; 23 is the shaft pin; 24 is the clamping block; 3 is the first clamping arm; 4 is the second clamping arm; 5 is the positioning block; 51 is the third positioning post; 52 is the third magnet; 6 is the locking mechanism; 61 is the hook; 62 is the locking part; 63 is the locking ring; 7 is the wire harness limiting base; 71 is the avoidance groove; 72 is the second positioning hole; 73 is the third positioning hole; 74 is the second magnet; 75 is the fourth magnet; 76 is the groove; 8 is the furnace loading carrier; 81 is the positioning groove; 82 is the fourth positioning post; 83 is the ventilation hole; 84 is the notch; 85 is the fifth positioning hole; 86 is the sixth positioning hole; 87 is the seventh positioning hole; 9 is the pad; 91 is the PCB circuit board; 92 is the spacing gap; 93 is the solder joint; 94 is the fourth positioning hole. Detailed implementation manners

[0043] The following further describes the present invention with reference to the accompanying drawings:

[0044] As Figures 1 to 11 shown, a jig for simultaneously soldering multiple wire harnesses on a PCB circuit board includes a wire inserting tooling 1, a wire harness locking mechanism 2, a wire harness limiting base 7, and a furnace loading carrier 8; the wire inserting tooling 1 is provided with a vertical jack 11 for fixing the position of the wire harness, the wire harness locking mechanism 2 is provided with a first clamping arm 3 and a second clamping arm 4 for clamping the wire harness fixed on the wire inserting tooling 1; the wire harness limiting base 7 is used for positioning the relative positions of the wire inserting tooling 1 and the wire harness locking mechanism 2; the furnace loading carrier 8 is used for fixing the PCB circuit board to be soldered and the wire inserting tooling 1 with the wire harness fixed thereon. During use, first, the wire inserting tooling 1 is fixed on the wire harness limiting base 7, the wire harness is inserted into the socket 11, then the wire harness locking mechanism 2 is fixed on the wire harness limiting base 7 and clamped and locked on the wire inserting tooling 1, then the PCB circuit board to be soldered, the wire harness locking mechanism 2 and the wire inserting tooling 1 locked together are fixed on the furnace loading carrier 8, and finally, the wire harness locking mechanism 2 is opened and removed, and the furnace loading carrier 8 carries the PCB circuit board to be soldered, the wire inserting tooling 1, and the wire harness fixed on the wire inserting tooling 1 into the reflow soldering equipment for solder joint soldering.

[0045] Specifically, the wire insertion tooling 1 is successively provided with a plurality of jacks 11 that penetrate up and down, and the jacks 11 correspond one-to-one with the wire harness welding positions on the PCB circuit board to be welded; a vertical opening 12 is provided on one side of each jack 11.

[0046] The wire harness locking mechanism 2 includes a first clamping arm 3 and a second clamping arm 4. A plurality of longitudinal ridges 21 are provided on the opposite sides of the first clamping arm 3 and the second clamping arm 4, and the ridges 21 correspond one-to-one with the openings 12. When the first clamping arm 3 and the second clamping arm 4 are locked on both sides of the wire insertion tooling 1, the ridges 21 enter the jacks 11 from the openings 12 and clamp the wire harness against the inner wall of the jacks 11, thereby fixing the position of the wire harness and facilitating its movement.

[0047] A second positioning post 14 is provided on the bottom side of the wire insertion tooling 1, and a second positioning hole 72 corresponding to the second positioning post 14 is provided on the wire harness limiting base 7; the bottom of the wire harness locking mechanism 2 is provided with a third positioning post 51 in a staggered manner. Preferably, at least three third positioning posts 51 are provided, and a third positioning hole 73 corresponding to the third positioning post 51 is provided on the wire harness limiting base 7. Before inserting the wire harness into the wire insertion tooling 1, the second positioning post 14 is inserted into the second positioning hole 72 on the wire harness limiting base 7 to fix the wire insertion tooling 1. After the wire harness is inserted into the wire insertion tooling 1, the third positioning post 51 is inserted into the third positioning hole 73 on the wire harness limiting base 7 for positioning. At this time, the positions of the wire harness locking mechanism 2 and the wire insertion tooling 1 are relatively fixed and it is convenient for the first clamping arm 3 and the second clamping arm 4 to be locked.

[0048] The upper surface of the furnace passing carrier 8 is provided with a positioning groove 81, and the positioning groove 81 is conformable to the PCB circuit board to be welded; the furnace passing carrier 8 is provided with a sixth positioning hole 86 corresponding to the second positioning post 14, and a seventh positioning hole 87 corresponding to the third positioning post 51.

[0049] When the wire harness needs to be welded to the PCB circuit board to be welded, the PCB circuit board to be welded is placed in the positioning groove 8l for position fixing. The second positioning post 14 is inserted into the sixth positioning hole 86 on the furnace passing carrier 8, and at the same time the third positioning post 51 is inserted into the seventh positioning hole 87 to limit the wire insertion tooling 1 and the wire harness locking mechanism 2 on the furnace passing carrier 8. At this time, the lower end of the wire harness corresponds to and contacts the solder joints on the PCB circuit board to be welded. After fixing, the wire harness locking mechanism 2 is opened and removed, and then the furnace passing carrier 8 is conveyed to the reflow soldering equipment through the transmission device for solder joint welding.

[0050] In a preferred embodiment, the inner diameter of the jack 11 is matched with the diameter of the external wire harness, and the width of the opening 12 is smaller than the radius of the jack 11 to prevent the wire harness inserted into the jack 11 from falling out from the opening 12. Preferably, the upper end of the jack 11 is funnel-shaped to facilitate the insertion of the wire harness into the jack 11.

[0051] One end of the first clamping arm 3 and the second clamping arm 4 is rotatably arranged on the positioning block 5 through a shaft pin 23, and a locking mechanism 6 is provided at the other end of the first clamping arm 3 and the second clamping arm 4. Preferably, the third positioning post 51 is arranged at the bottom of the positioning block 5 in a staggered manner. When the locking mechanism 6 is locked, the gap between the first clamping arm 3 and the second clamping arm 4 matches the width of the wire inserting tooling 1. Further, the locking mechanism 6 includes a hook 61 and a locking member 62. The hook 61 is arranged on the first clamping arm 3, and the locking member 62 is arranged on the second clamping arm 4. A locking ring 63 is provided on the locking member 62. The locking ring 63 is sleeved on the hook 61, and by driving the locking member 62 to tighten the locking ring 63, the locking mechanism 6 locks the first clamping arm 3 and the second clamping arm 4. After driving the locking member 62 to release the locking ring 63, the locking ring 63 can be disengaged from the hook 61, that is, the locking mechanism 6 is opened. This locking mechanism 6 is a prior art and will not be described in detail in the present invention.

[0052] In a preferred embodiment, a plurality of clamping blocks 24 are respectively installed on the first clamping arm 3 and the second clamping arm 4. Preferably, there are 3 clamping blocks 24. A convex strip 21 is arranged on the clamping block 24, and there is a gap between the clamping blocks 24. In this way, when it is necessary to clamp a plurality of wire harnesses, it can prevent poor clamping of individual wire harnesses.

[0053] In an embodiment, first positioning posts 13 are provided on both side walls of the wire inserting tooling 1 at the end far from the positioning block 5, and corresponding first positioning holes 22 are provided on the first clamping arm 3 and the second clamping arm 4. When the wire harness locking mechanism 2 is locked on the wire inserting tooling 1, the first positioning posts 13 are inserted into the first positioning holes 22 to facilitate the positioning of the first clamping arm 3 and the second clamping arm 4, and at the same time prevent the wire inserting tooling 1 from falling off the wire harness locking mechanism 2, affecting the position of the wire harness in the wire inserting tooling 1. Preferably, the first positioning posts 13 are in the shape of a frustum of a cone with a smaller upper part and a larger lower part, and the first positioning holes 22 are frustum-shaped grooves with a larger opening and a smaller bottom. In this way, when the first positioning posts 13 are inserted into or withdrawn from the first positioning holes 22, it will not affect the rotation of the first clamping arm 3 and the second clamping arm 4. Similarly, the length of the first positioning posts 13 cannot interfere with the rotation of the first clamping arm 3 and the second clamping arm 4.

[0054] In an embodiment, first magnets 15 are further provided at both ends of the bottom side of the wire inserting tooling 1, and corresponding second magnets 74 are provided on the wire harness limiting base 7. Before the second positioning post 14 is inserted into the second positioning hole 72, the first magnets 15 and the second magnets 74 attract each other to form a pre-positioning. At the same time, after the second positioning post 14 is inserted into the second positioning hole 72, the first magnets 15 and the second magnets 74 are adsorbed together, which can avoid the wire inserting tooling 1 from shifting due to the gap between the second positioning post 14 and the second positioning hole 72. Further, one first magnet 15 is provided on the side of the wire inserting tooling 1 close to the positioning block 5, and two first magnets 15 are provided at the end of the wire inserting tooling 1 far from the positioning block 5. In this way, it has an anti-mistake effect on the use of the wire inserting tooling 1, avoiding the wire inserting tooling 1 from being reversed left and right and affecting the position accuracy of wire insertion.

[0055] The third magnet 52 is arranged at the bottom side of the positioning block 5 with a dislocation. Preferably, at least three third magnets 52 are provided. A corresponding fourth magnet 75 is provided on the wire harness limiting base 7. Before the third positioning post 51 is inserted into the third positioning hole 73, the third magnet 52 and the fourth magnet 75 attract each other to form pre-positioning. At the same time, after the third positioning post 51 is inserted into the third positioning hole 73, the third magnet 52 and the fourth magnet 75 are adsorbed together, which can prevent the third positioning post 51 and the third positioning hole 73 from having a gap, resulting in the displacement of the wire harness locking mechanism 2 or the dislocation with the wire inserting tooling 1.

[0056] In a preferred embodiment, the fourth magnet 75 and the second magnet 74 are arranged on the upper surface of the wire harness limiting base 7, so that the adsorption force of the magnet is stronger, enhancing the positioning effect on the wire inserting tooling 1 and the wire harness locking mechanism 2.

[0057] In an embodiment, the furnace loading carrier 8 is provided with a second magnet 74 corresponding to the first magnet 15, and also provided with a fourth magnet 75 corresponding to the third magnet 52. Before the second positioning post 14 is inserted into the sixth positioning hole 86 or / and the third positioning post 51 is inserted into the seventh positioning hole 87, the first magnet 15 and the second magnet 74 attract each other and / or the third magnet 52 and the fourth magnet 75 attract each other to form pre-positioning. At the same time, after the second positioning post 14 is inserted into the sixth positioning hole 86 and the third positioning post 51 is inserted into the seventh positioning hole 87, the first magnet 15 and the second magnet 74 are adsorbed together and the third magnet 52 and the fourth magnet 75 are adsorbed together, which can prevent the second positioning post 14 and the sixth positioning hole 86 from having a gap, resulting in the displacement of the wire inserting tooling 1 and affecting the relative position between the wire harness and the solder joint, and prevent the third positioning post 51 and the seventh positioning hole 87 from having a gap, resulting in the dislocation of the wire harness locking mechanism 2.

[0058] In a preferred embodiment, the fourth magnet 75 and the second magnet 74 are arranged on the lower surface of the furnace loading carrier 8. Because after the wire inserting tooling 1 and the wire harness locking mechanism 2 are fixed on the furnace loading carrier 8, it is necessary to open and remove the wire harness locking mechanism 2. At this time, the adsorption force between the fourth magnet 75 and the third magnet 52 is relatively small, and the wire harness locking mechanism 2 can be removed without much force, avoiding the influence on the wire inserting tooling 1. At the same time, when the wire inserting tooling 1 is removed after the wire harness welding is completed, the adsorption force between the first magnet 15 and the second magnet 74 is relatively small, reducing the influence on the solder joint.

[0059] On the wire harness limiting base 7, there is also a groove 76, which corresponds to the jack 11. Preferably, the depth of the groove 76 is 0.2 mm. When the wire harness is inserted into the jack 11, the lower end of the wire harness extends into the groove 76. In this way, when the wire harness is moved to the furnace passing carrier 8, the lower end of the wire harness will extend beyond the lower surface of the wire inserting tooling and better contact the wire harness welding position on the PCB circuit board. Further, the depth of the positioning groove 81 is 0.05 - 0.2 mm less than the thickness of the PCB circuit board to be welded. After the wire harness locking mechanism 2 and the wire inserting tooling 1 locked together are fixed on the positioning groove 81, the PCB circuit board to be welded is pressed in the positioning groove 81 to prevent the PCB circuit board to be welded from shaking up and down. At the same time, it can also compensate for the height dispersion caused by the inconsistent thickness of the PCB circuit board to be welded, ensuring better contact between the wire harness and the wire harness welding position.

[0060] In a preferred embodiment, there is a fourth positioning post 82 in the positioning groove 81, and a corresponding fourth positioning hole 94 is provided on the PCB circuit board to be welded. When the PCB circuit board is placed in the positioning groove 81, the fourth positioning post 82 passes through the fourth positioning hole 94 of the PCB circuit board to be welded, further ensuring the position fixation of the PCB circuit board. Further, there is also a ventilation hole 83 at the bottom of the positioning groove 81. The ventilation hole 83 facilitates the hot air convection of the reflow soldering equipment, allowing the heat to directly reach the solder joints and quickly complete the soldering.

[0061] In an embodiment, there is a fifth positioning hole 85 at the edge of the furnace passing carrier 8. Preferably, there are at least three fifth positioning holes 85. After the furnace passing carrier 8 enters the reflow soldering equipment, the reflow soldering equipment limits and fixes the furnace passing carrier 8 through the fifth positioning hole 85 to prevent the furnace passing carrier 8 from shifting during the processing and affecting the welding quality. Further, preferably, the furnace passing carrier 8 is rectangular, and there is a fifth positioning hole 85 at each of the four corners of the furnace passing carrier 8.

[0062] In an embodiment, a notch 84 is provided at the edge position of the positioning groove 81 to form an avoidance position, which is convenient for taking and placing the PCB circuit board. Preferably, the notch 84 is symmetrically arranged at the corner position of the positioning groove 81.

[0063] In a preferred embodiment, the wire inserting tooling 1 includes a first support 16 and a second support 17. Between the first support 16 and the second support 17 is a wire inserting part 18. The jacks 11 are arranged along the edge of the wire inserting part 18. The first support 16 and the second support 17 support the wire inserting part 18 to be suspended above the positioning groove 81. In this way, the lower end of the wire inserting part 18 is far from the solder joints at the lower end of the wire harness, avoiding the solder at the solder joints from melting and sticking to the wire inserting part 18 during welding, which may cause the wire inserting tooling 1 to be welded to the PCB circuit board. The second positioning post 14 and the first magnet 15 are arranged on the first support 16 and the second support 17. Preferably, the wire inserting part 18, the first support 16 and the second support 17 are integrally formed.

[0064] In a preferred embodiment, the wire plugging tool 1 is further provided with a plurality of longitudinal through holes 19 to facilitate hot air of reflow soldering to reach the soldering points covered by the wire plugging tool 1 for soldering.

[0065] In one embodiment, when a plurality of PCBs are mounted on the pad and separated by spacers 92, a plurality of protrusions are provided on the lower surface of the wire insertion portion 18. These protrusions are spaced apart from the lower end of the jack 11. When the wire insertion tool 1 is secured to the furnace carrier 8, the protrusions extend into the spacers 92 between the PCBs, preventing the lower end of the wire harness from deforming and extending into the spacers 92, thereby misaligning with the solder joints 93 on the PCBs and affecting welding quality. Furthermore, a clearance groove 71 is provided on the upper surface of the wire harness limiting base 7, corresponding to the clearance groove 71.

[0066] In the above technical solution, the second positioning column 14 is inserted into the second positioning hole 72 on the wiring harness limiting base 7. At this time, the first magnet 15 and the second magnet 74 are attracted together, and the wire plugging tool 1 is positioned on the wiring harness limiting base 7. Then, the wiring harness is inserted into the socket 11 one by one and the lower end of the wiring harness contacts the bottom of the groove 76; then the third positioning column 51 is inserted into the third positioning hole 73 on the wiring harness limiting base 7 to position the wiring harness locking mechanism 2 on the wiring harness limiting base 7. At this time, the position of the positioning block 5 and the wire plugging tool 1 is relatively fixed, and the first clamping arm 3 and the second clamping arm 4 are rotated to clamp them on both sides of the wire plugging tool 1. At this time, the protrusion 21 enters the socket 11 from the opening 12 to press the wiring harness tightly against the side wall of the socket 11, and then the locking mechanism 6 is locked, and the fixed wiring harness locking mechanism 2 and the wire plugging tool 1 are removed from the wiring harness limiting base 7.

[0067] Several PCBs 91 are mounted on the soldering pads 9, each with solder joints 93 connected to the wiring harness. The soldering pads 9 are placed in the positioning slots 81, with the fourth positioning holes 94 positioned over the fourth positioning posts 82. The harness locking mechanism 2 and the wire insertion tool 1, which are fixed together, are then positioned on the furnace carrier 8. The locking mechanism 6 is then opened, and the harness locking mechanism 2 is removed and separated from the wire insertion tool 1. The lower end of the wiring harness is now aligned with the solder joints 93. The furnace carrier 8, carrying the soldering pads 9 and wire insertion tool 1, is then placed on a conveyor, which drives the furnace carrier 8 into the reflow soldering equipment for soldering.

[0068] The present invention also provides a method for vertically welding multiple wire harnesses, which uses the jig in the above technical solution to fix and carry the PCB circuit board and wire harness to be welded, and performs welding on a reflow soldering device, specifically comprising the following steps:

[0069] Step 1: Position the wire inserting tooling 1 on the wire harness limiting base 7, vertically insert the wire harness into the jack 11 of the wire inserting tooling 1, and make the bottom end of the wire harness contact with the wire harness limiting base 7.

[0070] Step 2: Position the wire harness locking mechanism 2 on the wire harness limiting base 7, and make the first clamping arm 3 and the second clamping arm 4 clamp on both sides of the wire inserting tooling 1, and the convex strip 21 enters into the jack 11 to fix the wire harness.

[0071] Step 3: Remove the locked-together wire harness locking mechanism 2 and wire inserting tooling 1 from the wire harness limiting base 7 for standby.

[0072] Step 4: Place the PCB circuit board to be welded in the positioning groove 81 of the furnace passing carrier 8, with the side of the PCB circuit board to be welded having the wire harness welding position facing upward.

[0073] Step 5: Position the locked-together wire harness locking mechanism 2 and wire inserting tooling 1 in Step 3 on the furnace passing carrier 8.

[0074] Step 6: Open the wire harness locking mechanism 2 to separate the first clamping arm 3 and the second clamping arm 4 from the wire inserting tooling 1, and then remove the wire harness locking mechanism 2 from the furnace passing carrier 8.

[0075] Step 7: Confirm that the bottom end of the wire harness on the wire inserting tooling 1 in Step 6 corresponds to and contacts the wire harness welding position of the PCB circuit board to be welded on the furnace passing carrier 8 one by one, and then place the furnace passing carrier 8 on the conveying device, and the conveying device drives the furnace passing carrier 8 into the reflow soldering equipment for soldering.

[0076] Step 8: After welding is completed, remove and recycle the wire inserting tooling 1 and the furnace passing carrier 8 for cyclic use.

[0077] In the present invention, the PCB circuit board to be welded can be a single circuit board or solder pads with multiple PCB circuit boards arranged at intervals. In addition, solder for reflow soldering is printed in advance at the wire harness welding position of the PCB circuit board to be welded.

[0078] This embodiment is only an illustration of the concept and implementation of the present invention, and does not limit it. Under the concept of the present invention, technical solutions without substantial transformation are still within the protection scope.

Claims

1. A method for vertically welding multiple wire harnesses, characterized in that, Welding is performed on a reflow soldering device using a reflow soldering jig. The reflow soldering jig includes a furnace carrier, a wire insertion tooling, a wire harness locking mechanism, and a wire harness limiting base. The wire insertion tooling is sequentially provided with a plurality of vertically penetrating jacks on it. The jacks correspond to the wire harness soldering positions on the PCB circuit board to be soldered. One side of the jack is provided with a vertical opening. The wire harness locking mechanism includes a first clamping arm and a second clamping arm. A number of longitudinal ridges are provided on the opposite sides of the first clamping arm and the second clamping arm. The ridges correspond to the opening. The first clamping arm and the second clamping arm can be clamped on the wire insertion tooling, and the ridges enter the jack through the opening to clamp the wire harness. The wire harness limiting base is used to position the wire insertion tooling and the wire harness locking mechanism. A second positioning post is provided on the bottom side of the wire insertion tooling, and a second positioning hole corresponding to the second positioning post is provided on the wire harness limiting base. A third positioning post is provided at the bottom of the wire harness locking mechanism, and a third positioning hole corresponding to the third positioning post is provided on the wire harness limiting base. A positioning groove is provided on the upper surface of the furnace carrier, and the positioning groove is conformable to the PCB circuit board to be soldered. A sixth positioning hole cooperating with the second positioning post and a seventh positioning hole cooperating with the third positioning post are also provided on the furnace carrier. The welding method specifically includes the following steps: Step 1: Position the wire insertion tooling on the wire harness limiting base, vertically insert the wire harness into the jack of the wire insertion tooling, and make the bottom end of the wire harness contact the wire harness limiting base. Step 2: Position the wire harness locking mechanism on the wire harness limiting base, clamp the first clamping arm and the second clamping arm on both sides of the wire insertion tooling, and make the ridges enter the jack to clamp the wire harness, and then lock the wire harness locking mechanism. Step 3: Remove the wire harness locking mechanism and the wire insertion tooling locked together from the wire harness limiting base for standby. Step 4: Place the PCB circuit board to be soldered in the positioning groove of the furnace carrier, with the side of the PCB circuit board to be soldered having the wire harness soldering position facing upward. Step 5: Position the wire harness locking mechanism and the wire insertion tooling locked together in step 3 on the furnace carrier. Step 6: Open the wire harness locking mechanism to separate the first clamping arm and the second clamping arm from the wire insertion tooling, and then remove the wire harness locking mechanism from the furnace carrier. Step 7: Place the furnace carrier carrying the PCB circuit board to be soldered and the wire insertion tooling in step 6 into the reflow soldering device for welding. Step 8: After welding is completed, remove and recycle the wire insertion tooling and the furnace carrier for cyclic use.

2. The method for vertically welding multiple wire harnesses according to claim 1, characterized in that, One end of the first clamping arm and the second clamping arm is rotatably arranged on a positioning block, and a locking mechanism is provided at the other end of the first clamping arm and the second clamping arm. The locking mechanism includes a hook provided on the first clamping arm and a locking member provided on the second clamping arm.

3. The method for vertically welding multiple wire harnesses according to claim 2, characterized in that, A first positioning post is provided on the side wall of the wire insertion tooling away from the positioning block end, and corresponding first positioning holes are provided on the first clamping arm and the second clamping arm.

4. The method for vertically welding multiple wire harnesses according to claim 3, characterized in that, A first magnet is further provided on the bottom side of the wire insertion tooling, and corresponding second magnets are respectively provided on the furnace passing carrier and the wire harness limiting base; a third magnet is staggeredly arranged on the bottom side of the positioning block, and corresponding fourth magnets are respectively provided on the furnace passing carrier and the wire harness limiting base; the second magnets and the fourth magnets are arranged on the lower surface of the furnace passing carrier; the second magnets and the fourth magnets are arranged on the upper surface of the wire harness limiting base.

5. The method for vertically welding multiple wire harnesses according to claim 4, wherein, The third positioning post is staggeredly arranged at the bottom of the positioning block.

6. The method for vertically welding multiple wire harnesses according to claim 5, characterized in that, A groove is further provided on the wire harness limiting base, and the groove corresponds to the jack.

7. The method for vertically welding multiple wire harnesses according to claim 1, wherein A fourth positioning post for fixing the PCB circuit board to be welded is provided in the positioning groove, a notch is provided on the edge of the positioning groove, and a ventilation hole is provided at the bottom of the positioning groove; a fifth positioning hole is further provided on the edge of the furnace passing carrier.

8. The method for vertically welding multiple wire harnesses according to claim 1, wherein, The wire insertion tooling includes a first support, a second support and a wire insertion part, the jacks are arranged along the edge of the wire insertion part, and the first support and the second support support the wire insertion part to be suspended above the positioning groove.

9. The method for vertically welding multiple wire harnesses according to any one of claims 1 to 8, characterized in that, Before putting the furnace passing carrier into the reflow soldering equipment in step 7, confirm that the bottom ends of the wire harnesses correspond to and contact the wire harness welding positions on the PCB circuit board to be welded one by one.

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