A process and apparatus for HB welding of stranded wire cores

Abstract

A twisted pair core wire HB welding process is disclosed, comprising the following steps: S1: positioning, S2: ground wire conductor handling, S3: wire stripping, S4: ground wire welding, S5: color wire welding, S6: component removal and self-inspection. This invention improves the H / B welding process. To prevent the conductor in the color wire and the bare ground wire from being simultaneously heated during welding, the ground wire's high temperature contact with the color wire insulation can burn or melt the insulation, causing short circuits or poor insulation withstand voltage between the core wire conductor and the bare ground wire. This affects the performance of the PCB after welding and results in a high defect rate. Therefore, by separating the welding process of the conductor in the color wire and the bare ground wire, simultaneous heating can avoid burning or melting of the insulation, effectively solving the problems of short circuits and poor insulation withstand voltage. After improvement, the defect rate is reduced to below 0.5%.

Description

Technical Field

[0001] This invention belongs to the field of twisted pair welding production, specifically relating to a twisted pair core wire HB welding process and apparatus. Background Technology

[0002] Circuit boards are widely used in industry and daily life. In today's society, circuit boards are used in various aspects. Surface mount resistors and chips are important components of circuit boards. When soldering circuit boards, it is necessary to solder each point and each resistor one by one, which is particularly time-consuming and not conducive to quickly completing the circuit board soldering. Therefore, there is a need for equipment that can solder multiple points and multiple resistors at the same time.

[0003] In existing technologies, the quality of manual soldering and hand-wrapping is highly dependent on the worker's skill and concentration. The labor intensity of workers is very high, requiring them to concentrate, which can easily lead to fatigue and personal safety accidents, such as burns from soldering irons and solder pots. It can also easily cause occupational diseases, such as respiratory diseases caused by the fumes produced during soldering and immersion in tin.

[0004] When welding the HB core wire of a stranded wire, the conductor in the colored wire and the bare ground wire are heated and welded at the same time. The ground wire, under high temperature, makes thermal contact with the insulation of the colored wire, which can burn or melt the insulation, causing a short circuit between the core wire conductor and the bare ground wire or poor insulation withstand voltage. The defect rate is about 10%. Therefore, a process is needed to improve the welding process to minimize the defect rate. Summary of the Invention

[0005] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0006] A process for welding HB stranded wire cores, wherein the specific steps are as follows:

[0007] S1: Positioning: Place the side with more solder pads facing up into the groove of the welding fixture for positioning;

[0008] S2: Ground wire conductor, place the ground wire and conductor in sequence on the positioning plate, and press the positioning plate down to position it;

[0009] S3: Wire stripping, which involves cutting the insulation off the positioned wires before soldering using a wire stripping device;

[0010] S4: Ground wire welding, H / B machine positioning baffle, heating H / B head, all color wire positions are cleared, first complete the ground wire welding in the twisted wire;

[0011] S5: Color wire soldering, replace H / B connector, make gaps for the already soldered ground wire, and perform soldering work on the color conductors of the twisted wire;

[0012] S6: Self-inspection of components: After welding is completed, remove the finished product from the welding equipment and perform self-inspection. There should be no defects such as false soldering, bridging, or large solder joints.

[0013] Preferably, the device improved according to process requirements in this process includes a bottom support base, wherein: the bottom support base is a hollow square structure, and a control circuit and a rotary motor are installed inside the bottom support base; a rotating fixing groove is provided above the bottom support base, and a rotating processing seat is rotatably fixed on the rotating fixing groove; the rotating processing seat can be driven up and down by the motor; the rotating fixing groove rotates by the rotary motor; the shape of the rotating fixing groove and the rotating processing seat is wave-shaped; five positioning limiting modules are evenly arranged on the rotating processing seat; a height conversion seat is matched with the rotating fixing groove; connecting rods are evenly arranged on the height conversion seat; the connecting rods correspond one-to-one with the positioning limiting modules; the other end of the connecting rod is movably fixed to a limiting post; the limiting post is fixed on the bottom support base; the connecting rods are set as positioning loading and unloading areas, wire stripping areas, welding limiting areas, ground wire welding areas, and color wire welding areas according to the different functions of the positioning limiting modules.

[0014] Preferably, the positioning and limiting module includes a base with an inclined slope at an angle of 5-10°. Limiting walls are provided on both sides of the inclined slope, each with a slot. A matching limiting plate is also provided on each slot. A limiting hole matching the outer diameter of the color wire and ground wire is provided below the limiting plate. A wire stripper blade is located at the inner end of the inclined slope. A PCB positioning plate extends inward from the base, and the PCB positioning plate performs contour positioning based on the PCB shape.

[0015] Preferably, the positioning loading and unloading area includes a positioning limiting module, and the inner side of the base is also provided with a wire length positioning groove. The wire length positioning groove can movably fix the wire length positioning plate. A sensor is installed in the wire length positioning groove to sense whether the wire length positioning plate is in the wire length positioning groove.

[0016] Preferably, the wire stripping area includes a positioning and limiting module. A support plate is provided on one side of the PCB positioning plate. One end of the support plate is fixed to the bottom support base. The upper end of the wire stripping blade is provided on the side of the support plate near the PCB board. The upper end of the wire stripping blade can slide left and right on the support plate. A gear one is provided at the rear end of the upper end of the wire stripping blade. A gear two is connected to the gear one. The gear two is connected to a gear three via a belt. The gear three rotates through a connecting rod. The gear one controls the forward and backward displacement and operation of the upper end of the wire stripping blade.

[0017] Preferably, the welding limiting area includes a positioning limiting module, and a pushing device is provided on one side of the PCB positioning plate. The pushing device includes a fixed box, and a push block is slidably fixed inside the fixed box. A screw is connected to the rear end of the push block, and the screw passes through the fixed box and is threadedly connected to the connecting rod.

[0018] Preferably, the ground wire soldering area includes a positioning restriction module, and an H / B heating plate is provided on one side of the PCB positioning plate. One end of the H / B heating plate is connected to the connecting rod and can move up and down with the connecting rod. A ground wire H / B soldering head is fixed to one end of the H / B heating plate. The shape below the ground wire H / B soldering head is modeled according to the ground wire spacing. The H / B heating plate is controlled by a control circuit.

[0019] Preferably, the color line welding area includes a positioning restriction module, and an H / B heating plate is provided on one side of the PCB positioning plate. One end of the H / B heating plate is connected to the connecting rod and can move up and down with the connecting rod. A color line H / B welding head is fixed to one end of the H / B heating plate. The shape below the color line H / B welding head is modeled according to the color line interval. The H / B heating plate is controlled by a control circuit.

[0020] In summary, the present invention has at least one of the following beneficial technical effects:

[0021] This invention improves the H / B soldering process. To prevent the conductor in the colored wire and the bare ground wire from being heated and soldered simultaneously, the ground wire's high temperature contact with the colored wire's insulation can burn or melt the insulation, causing a short circuit between the conductor and the bare ground wire or poor insulation withstand voltage, affecting the PCB's performance after soldering and resulting in a high defect rate. Therefore, by separating the soldering process of the conductor in the colored wire and the bare ground wire, the simultaneous heating can be avoided, preventing the insulation from being burned or melted. This effectively solves the problems of short circuits and poor insulation withstand voltage, reducing the defect rate to below 0.5% after the improvement.

[0022] This invention modifies the equipment based on process improvements. By performing one-time positioning and feeding of PCB boards and color and ground wires, the equipment completes the feeding, stripping, positioning, ground wire soldering, and color wire soldering in one go. This eliminates the need for manual soldering, preventing employees from being exposed to hazardous environments for extended periods. It also eliminates the need for repeated positioning, resulting in a significant improvement in accuracy and yield.

[0023] This invention, by setting a wave-shaped joint between the rotating fixed groove and the rotating processing seat, allows five processes of the equipment to be performed simultaneously. Each process completes a different action according to the up-and-down undulation of the wave shape. The action structure is safe and effective, and can realize semi-automatic production. Attached Figure Description

[0024] Figure 1 This is an overall schematic diagram of the welding equipment of the present invention;

[0025] Figure 2 This is an overall schematic diagram of the positioning restriction module of the present invention;

[0026] Figure 3 This is a schematic diagram of the rotating fixing groove and rotating processing seat of the present invention;

[0027] Figure 4 This is a top view of the welding equipment of the present invention;

[0028] Figure 5 This is a schematic diagram of the positioning and loading / unloading area of ​​the present invention;

[0029] Figure 6 This is a schematic diagram of the stripping area of ​​the present invention;

[0030] Figure 7 This is a schematic diagram of the welding limiting area of ​​the present invention;

[0031] Figure 8 This is a schematic diagram of the ground wire welding area of ​​the present invention;

[0032] Figure 9 This is a schematic diagram of the color line welding area of ​​the present invention;

[0033] Figure 10 This is a schematic diagram of the ground wire H / B welding joint of the present invention;

[0034] Figure 11 This is a schematic diagram of the H / B welding head of the color line of the present invention.

[0035] Reference numerals: 1 Bottom support, 2 Rotary fixing groove, 3 Rotary processing seat, 4 Positioning limiting module, 401 Base, 402 Inclined slope, 403 Limiting wall, 404 Slot, 405 Limiting plate, 407 Lower end of wire stripper blade, 408 PCB positioning plate, 7 Connecting rod, 8 Limiting post, 9 Positioning loading and unloading area, 901 Wire length positioning groove, 902 Wire length positioning plate, 10 Wire stripping area, 1001 Support plate, 1002 Upper end of wire stripper blade, 1003 Gear 1, 1004 Gear 2, 1005 Gear 3, 11 Welding limiting area, 1101 Fixing box, 1102 Push block, 12 Ground wire welding area, 1201 H / B heating plate, 1202 Ground wire H / B welding head, 13 Color wire welding area, 1301 Color wire H / B welding head. Implementation

[0036] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0037] A process and apparatus for welding HB stranded wire cores, wherein the specific steps are as follows:

[0038] S1: Positioning: Place the side with more solder pads facing up into the groove of the welding fixture for positioning;

[0039] S2: Ground wire conductor, place the ground wire and conductor in sequence on the positioning plate, and press the positioning plate down to position it;

[0040] S3: Wire stripping, which involves cutting the insulation off the positioned wires before soldering using a wire stripping device;

[0041] S4: Ground wire welding, H / B machine positioning baffle, heating H / B head, all color wire positions are cleared, first complete the ground wire welding in the twisted wire;

[0042] S5: Color wire soldering, replace H / B connector, make gaps for the already soldered ground wire, and perform soldering work on the color conductors of the twisted wire;

[0043] S6: Self-inspection of components: After welding is completed, remove the finished product from the welding equipment and perform self-inspection. There should be no defects such as false soldering, bridging, or large solder joints.

[0044] Specifically, the improved device in this process includes a bottom support base 1, wherein: the bottom support base 1 is a hollow square structure, and a control circuit and a rotary motor are installed inside the bottom support base 1; a rotating fixing groove 2 is provided above the bottom support base 1, and a rotary processing seat 3 is rotatably fixed on the rotating fixing groove 2; the rotary processing seat 3 can be driven up and down by a motor; the rotating fixing groove 2 rotates by a rotary motor; and the matching shape of the rotating fixing groove 2 and the rotary processing seat 3 is wavy. The rotary processing base 3 is evenly provided with five positioning and limiting modules 4, and a height conversion seat is provided to match the rotary fixing groove 2. The height conversion seat is evenly provided with connecting rods 7, and the connecting rods 7 correspond one-to-one with the positioning and limiting modules 4. The other end of the connecting rod 7 is fixed to the limiting post 8, which can move up and down. The limiting post 8 is fixed to the bottom support base 1. The connecting rods 7 are set as positioning loading and unloading area 9, wire stripping area 10, welding limiting area 11, ground wire welding area 12, and color wire welding area 13, depending on the function of the positioning and limiting modules 4.

[0045] Specifically, the positioning restriction module 4 includes a base 401, on which an inclined slope 402 is provided. The inclined slope 402 has an inclination angle of 5-10°. Limiting walls 403 are provided on the left and right sides of the inclined slope 402. The limiting walls 403 have slots 404. The slots 404 also have matching limiting plates 405. The limiting plates 405 have limiting holes below them that match the outer diameters of the color wire and the ground wire. The inner end of the inclined slope 402 also has a wire stripping blade lower end 407. The base 401 extends inward to a PCB positioning plate 408, which performs contour positioning according to the shape of the PCB.

[0046] Specifically, the positioning loading and unloading area 9 includes a positioning restriction module 4, and the inner side of the base 401 is also provided with a wire length positioning groove 901. The wire length positioning groove 901 can movably fix the wire length positioning plate 902. A sensor is installed in the wire length positioning groove 901 to sense whether the wire length positioning plate 902 is in the wire length positioning groove 901.

[0047] Specifically, the wire stripping area 10 includes a positioning and limiting module 4. A support plate 1001 is provided on one side of the PCB positioning disk 408. One end of the support plate 1001 is fixed to the bottom support base 1. The upper end 1002 of the wire stripping blade is provided on the side of the support plate 1001 near the PCB board. The upper end 1002 of the wire stripping blade can slide left and right on the support plate 1001. A gear 1003 is provided at the rear end of the upper end 1002 of the wire stripping blade. A gear 2 1004 is connected to the gear 1003. The gear 2 1004 is connected to a gear 3 1005 through a belt. The gear 3 1005 rotates through a connecting rod 7. The gear 1 1003 controls the forward and backward displacement and operation of the upper end 1002 of the wire stripping blade.

[0048] Specifically, the welding limiting area 11 includes a positioning limiting module 4, and a pushing device is provided on one side of the PCB positioning disk 408. The pushing device includes a fixed box 1101, and a push block 1102 is slidably fixed inside the fixed box 1101. A screw is connected to the rear end of the push block 1102, and the screw passes through the fixed box 1101 and is threadedly connected to the connecting rod 7.

[0049] Specifically, the ground wire soldering area 12 includes a positioning restriction module 4, and an H / B heating plate 1201 is provided on one side of the PCB positioning disk 408. One end of the H / B heating plate 1201 is connected to the connecting rod 7 and can move up and down with the connecting rod 7. A ground wire H / B soldering head 1202 is fixed to one end of the H / B heating plate 1201. The shape below the ground wire H / B soldering head 1202 is modeled according to the ground wire interval. The H / B heating plate 1201 is controlled by a control circuit.

[0050] Specifically, the color line soldering area 13 includes a positioning restriction module 4, and an H / B heating plate 1201 is provided on one side of the PCB positioning disk 408. One end of the H / B heating plate 1201 is connected to the connecting rod 7 and can move up and down with the connecting rod 7. A color line H / B soldering head 1301 is fixed to one end of the H / B heating plate 1201. The shape below the color line H / B soldering head 1301 is modeled according to the color line interval. The H / B heating plate is controlled by a control circuit.

[0051] The specific working principle of the process improver equipment is as follows:

[0052] When starting work, insert the wire length positioning plate 902 into the wire length positioning groove 901. At this time, the sensor detects the state inside the groove. At this time, no movement occurs in any structure of the equipment to prevent injury to the operator. Then, arrange the ground wire and colored wire in sequence on the inclined slope 402. After all the colored wires and ground wires are against the guide length positioning plate 902, press down the limiting plate 405 to fix the position of all the colored wires and ground wires. Then, place the PCB board to be soldered into the PCB positioning plate 408, and at the same time, pull the guide length positioning plate 902 out of the guide length positioning groove 901. At this time, the equipment starts to rotate by the rotary motor.

[0053] Since the rotating fixed groove 2 and the rotating processing seat 3 are matched with a wave-like shape, when the rotating processing seat 3 rotates, the rotating fixed groove 2 will move upward. Then, the rotating fixed groove 2 will move vertically downward under the drive of the motor. The wire stripping area 10, welding limit area 11, ground wire welding area 12, and color wire welding area 13 of this equipment will have different actions.

[0054] In the wire stripping area 10, when the rotating fixed groove 2 moves upward, it drives the connecting rod 7 to move upward, which in turn drives gear 1003, gear 2 1004 and gear 3 1005 to rotate. At this time, the upper end of the wire stripping blade moves to the right. After reaching the top right side, the motor drives the rotating fixed groove 2 to move downward. At this time, the upper end 1002 of the wire stripping blade clamps the wire to be stripped. Then, the upper end 1002 and the lower end 407 of the wire stripping blade interact to peel off the outer sheath of the colored wire. The movement is repeated.

[0055] When the rotating fixed groove 2 moves upward in the welding limiting area 11, it drives the connecting rod 7 to move upward. The connecting rod 7 drives the screw to rotate. At this time, the screw pulls the push block 1102 back to the initial position to the left. After reaching the left side, the motor drives the rotating fixed groove 2 to move downward. At this time, the connecting rod 7 moves downward, and the screw pushes the push block 1102 to the right. The push block 1102 pushes the PCB board to the right at the same time. At this time, due to the setting of the inclined slope 402, the ground wire and the color wire are in a raised state. At this time, the PCB board can easily enter below the ground wire and the color wire to reach the designated position.

[0056] In the ground wire soldering area 12, when the rotating fixed groove 2 moves upward, it drives the connecting rod 7 to move upward. At this time, the H / B heating plate 1201 and the ground wire H / B soldering head 1202 move upward. After reaching the uppermost end, the motor drives the rotating fixed groove 2 to move downward. At this time, the connecting rod 7 moves downward. The H / B heating plate 1201 and the ground wire H / B soldering head 1202 move downward and press the ground wire to the PCB board for heating and soldering.

[0057] In the color wire welding area 13, when the rotating fixing groove 2 moves upward, it drives the connecting rod 7 to move upward. At this time, the H / B heating plate 1201 and the color wire H / B welding head 1301 move upward. After reaching the uppermost end, the motor drives the rotating fixing groove 2 to move downward. At this time, the connecting rod 7 moves downward. The H / B heating plate 1201 and the color wire H / B welding head 1301 move downward and press the color wire to the PCB board for heating and welding.

[0058] Afterwards, the positioning loading and unloading area 9 rotates back to its initial position. The staff removes the soldered PCB board for self-inspection and presses down the limit plate to fix the position of all colored lines and ground lines. Then, the PCB board to be soldered is placed into the PCB positioning tray.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pair of twisted core wires HB welding device characterized by: The system includes a bottom support base (1), wherein: the bottom support base (1) is a hollow square structure, and a control circuit and a rotary motor are installed inside the bottom support base (1). A rotating fixing groove (2) is provided above the bottom support base (1), and a rotary processing seat (3) is rotatably fixed below the rotating fixing groove (2). The rotary processing seat (3) can be driven to rotate by the motor. The rotating fixing groove (2) moves up and down through the rotary processing seat (3). The shape matched between the rotating fixing groove (2) and the rotary processing seat (3) is wavy. Five positioning limiting modules (4) are evenly arranged along the circumference of the rotary processing seat (3). A height conversion seat is matched with the rotating fixing groove (2). A connecting rod (7) is evenly arranged on the height conversion seat. The connecting rod (7) is connected to the... The positioning restriction module (4) is matched one-to-one. The other end of the connecting rod (7) is fixed to the limiting post (8) in a vertical position. The limiting post (8) is fixed on the bottom support base (1). The connecting rod (7) is set as the positioning loading and unloading area (9), the wire stripping area (10), the welding limiting area (11), the ground wire welding area (12), and the color wire welding area (13) according to the different functions of the positioning restriction module (4). Since the shape matched between the rotating fixing groove (2) and the rotating processing seat (3) is wavy, when the rotating processing seat (3) rotates, the rotating fixing groove (2) will move upward. Then, the rotating fixing groove (2) will move vertically downward under the drive of the motor. The wire stripping area (10), the welding limiting area (11), the ground wire welding area (12), and the color wire welding area (13) of this equipment will have different actions.

2. The HB welding device for twisted pair core wires according to claim 1, characterized in that: The positioning restriction module (4) includes a base (401), an inclined slope (402) is provided on the base (401), the inclined slope (402) is provided with an inclination angle of 5-10°, the left and right sides of the inclined slope (402) are provided with limiting wall (403), the limiting wall (403) is provided with a slot (404), the slot (404) is also provided with a matching limiting plate (405), the limiting plate (405) is provided with a limiting hole matching the outer diameter of the color wire and the ground wire below, the inclined slope (402) is also provided with the lower end (407) of the wire stripping blade at one end near the inside, the base (401) is also provided with a PCB positioning plate (408) extending inward, the PCB positioning plate (408) is used for contour positioning according to the shape of the PCB.

3. The HB welding device for stranded wire cores according to claim 2, characterized in that: The positioning loading and unloading area (9) includes a positioning restriction module (4). The inner side of the base (401) is also provided with a wire length positioning groove (901). The wire length positioning groove (901) can movably fix the wire length positioning plate (902). A sensor is installed in the wire length positioning groove (901) to sense whether the wire length positioning plate (902) is in the wire length positioning groove (901).

4. The HB welding device for stranded wire cores according to claim 2, characterized in that: The wire stripping area (10) includes a positioning restriction module (4). A support plate (1001) is provided on one side of the PCB positioning disk (408). One end of the support plate (1001) is fixed on the bottom support base (1). The upper end (1002) of the wire stripping blade is provided on the side of the support plate (1001) close to the PCB board. The upper end (1002) of the wire stripping blade can slide left and right on the support plate (1001). A gear one (1003) is provided at the rear end of the upper end (1002) of the wire stripping blade. A gear two (1004) is connected to the gear one (1003). A gear three (1005) is connected to the gear two (1004) through a belt. The gear three (1005) rotates through a connecting rod (7). The gear one (1003) controls the front and back displacement and operation of the upper end (1002) of the wire stripping blade.

5. The HB welding device for stranded wire cores according to claim 2, characterized in that: The welding limiting area (11) includes a positioning limiting module (4). A pushing device is provided on one side of the PCB positioning plate (408). The pushing device includes a fixed box (1101). A push block (1102) is slidably fixed inside the fixed box (1101). A screw is connected to the rear end of the push block (1102). The screw passes through the fixed box (1101) and is threadedly connected to the connecting rod (7).

6. The HB welding device for stranded wire cores according to claim 2, characterized in that: The ground wire welding area (12) includes a positioning restriction module (4). An H / B heating plate (1201) is provided on one side of the PCB positioning plate (408). One end of the H / B heating plate (1201) is connected to the connecting rod (7) and can move up and down with the connecting rod (7). A ground wire H / B welding head (1202) is fixed at one end of the H / B heating plate (1201). The shape below the ground wire H / B welding head (1202) is modeled according to the ground wire interval. The H / B heating plate (1201) is controlled by a control circuit.

7. The HB welding device for stranded wire cores according to claim 2, characterized in that: The color line welding area (13) includes a positioning restriction module (4). An H / B heating plate (1201) is provided on one side of the PCB positioning plate (408). One end of the H / B heating plate (1201) is connected to the connecting rod (7) and can move up and down with the connecting rod (7). A color line H / B welding head (1301) is fixed to one end of the H / B heating plate (1201). The shape below the color line H / B welding head (1301) is modeled according to the color line interval. The H / B heating plate is controlled by a control circuit.

8. A stranded wire core HB welding process, based on the stranded wire core HB welding device according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: S1: Positioning: Place the side with more solder pads facing up into the groove of the welding fixture for positioning; S2: Ground wire conductor, place the ground wire and conductor in sequence on the positioning plate, and press the positioning plate down to position it; S3: Wire stripping, which involves cutting the insulation off the positioned wires before soldering using a wire stripping device; S4: Ground wire welding, H / B machine positioning baffle, heating H / B head, all color wire positions are cleared, first complete the ground wire welding in the twisted wire; S5: Color wire soldering, replace H / B connector, make gaps for the already soldered ground wire, and perform soldering work on the color conductors of the twisted wire; S6: Self-inspection of components: After welding is completed, remove the finished product from the welding equipment and perform self-inspection. There should be no defects such as false soldering, bridging, or large solder joints.

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