A soldering apparatus for electrically conductive terminals

Abstract

The present application relates to the technical field of welding, and particularly provides a welding equipment for a conductive terminal, which comprises a machine table, an electromagnetic heater, a feeder and a clamp, the electromagnetic heater is arranged on the machine table and can move along a vertical direction, the feeder is arranged on the machine table and is located directly above the electromagnetic heater, and the clamp comprises two clamping jaws which are rotatably connected to the machine table about the same axis. The present application is provided with a negative pressure air extraction hole on the clamping jaw. Since the clamping jaw is located directly below the molten tin liquid, and a low pressure area is continuously formed at the inner side surface of the clamping jaw by the negative pressure air extraction hole, the molten tin liquid is also subjected to a downward negative pressure suction force. Therefore, the molten tin liquid flows downward under the joint action of its own gravity and the negative pressure suction force at the negative pressure extraction hole, and the flowability of the molten tin liquid downward is better, so that the molten tin liquid can effectively penetrate the conductive wire and sufficiently fill between the conductive wire and the terminal, and thus the tin welding connection effect between the conductive wire and the terminal is better.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding device for conductive terminals. Background Technology

[0002] To establish a stable and reliable electrical path and ensure that the connection between the terminal block and the copper wire maintains low resistance and high safety conductivity over a long period of time, molten tin must be filled between the terminal block and the copper wire during soldering. The low melting point, good wettability and fluidity of tin are used to fill the microscopic contact gaps between the two, eliminate air gaps and oxide layers, and allow tin and copper to form a low-resistance intermetallic compound.

[0003] During soldering, the terminals are usually first loosely soldered to the copper wires. Then, the terminals and copper wires are placed in the heating area of ​​the soldering mechanism. The solder wire is melted by the electric heating coil, and the molten solder generated by the melting of the solder wire is used to fill the microscopic contact gap between the terminals and the copper wires.

[0004] However, existing soldering mechanisms have the following problems during soldering: the molten solder flows downwards only by its own fluidity, so the solder cannot penetrate the copper wire well, resulting in the solder only filling the surface of the copper wire, thus the soldering effect is poor. Summary of the Invention

[0005] Therefore, it is necessary to provide a welding device for conductive terminals to address the problems existing in current soldering equipment and solve the problem of poor welding effect of existing soldering equipment.

[0006] The above objectives are achieved through the following technical solutions: A welding apparatus for conductive terminals is used to solder wires and terminals.

[0007] A welding apparatus for conductive terminals includes: Machine tool; An electromagnetic heater is mounted on the machine base and can move vertically. The feeder is mounted on the machine base and located directly above the electromagnetic heater; The fixture includes two grippers that are rotatably connected to the machine base about the same axis. Both grippers have negative pressure suction chambers inside, and several negative pressure suction holes are evenly distributed on the inner side of the grippers, while negative pressure suction ports are distributed on the outer side.

[0008] Furthermore, a card holder is provided on one side of the machine and directly below the electromagnetic heater, and a notch is provided on the outer side of the card holder.

[0009] Furthermore, the upper surface of the gripper is flush with the lower surface of the card holder.

[0010] Furthermore, a heat dissipation chamber is also provided on the gripper and above the negative pressure suction chamber. An air inlet communicating with the heat dissipation chamber is provided on one side of the gripper, and an air outlet communicating with the heat dissipation chamber is provided on the other side.

[0011] Furthermore, it also includes a proportional flow divider valve, one branch input of which is connected to the air outlet, and the other branch input is connected to the negative pressure suction port. The output of the proportional flow divider valve is connected to the negative pressure suction pump. The machine is also equipped with a temperature detection module to detect the temperature of the wiring terminals, and the temperature detection module is connected to the signal of the proportional flow divider valve. When the temperature detection module detects that the surface temperature of the wiring terminal is higher than the upper limit, the temperature detection module communicates with the proportional flow divider valve to increase the branch opening at the air outlet and decrease the branch opening at the negative pressure air extraction port. When the temperature detection module detects that the surface temperature of the wiring terminal is lower than the lower limit, the temperature detection module communicates with the proportional flow divider valve to reduce the branch opening at the air outlet and increase the branch opening at the negative pressure air extraction port.

[0012] Furthermore, a welding device for conductive terminals also includes a drive assembly for controlling the opening or closing of two grippers.

[0013] Furthermore, the linear drive source includes a first linear drive element and hinge rods. The fixed end of the first linear drive element is located at the bottom of the machine base. The same end of the two hinge rods is hinged to the telescopic end of the first linear drive element at a point. The other ends of the two hinge rods are respectively hinged to two grippers.

[0014] Furthermore, the electromagnetic heater includes an electromagnetic heating coil, a second linear drive element, and a water cooling module. The fixed end of the second linear drive element is mounted on the machine base, the electromagnetic heating coil is mounted on the telescopic end of the second linear drive element, and the water cooling module is used to cool the electromagnetic heating coil after it is heated and energized.

[0015] Furthermore, the water-cooling module includes a water chiller, a cooling water inlet pipe, and a cooling water outlet pipe. The cooling water inlet pipe is connected to one end of the electromagnetic heating coil, and the cooling water outlet pipe is connected to the other end of the electromagnetic heating coil. The cooling water outlet of the water chiller is connected to the end of the cooling water outlet pipe away from the electromagnetic heating coil, and the cooling water return port of the water chiller is connected to the end of the cooling water outlet pipe away from the electromagnetic heating coil.

[0016] Furthermore, the feeder includes a solder wire spool, a motor, a guide tube, a wire feeding wheel, and a third linear drive element. The fixed end of the third linear drive element is mounted on the machine base. The guide tube is fixedly connected to the telescopic end of the third linear drive element and is located directly above the electromagnetic heating coil. The solder wire is inserted into the guide tube. The solder wire spool is rotatably connected to the machine base. The motor is mounted on the machine base, and the output end of the motor is coaxially fixedly connected to the solder wire spool. There are two wire feeding wheels, spaced apart within the machine base, used to convey the solder wire outward.

[0017] The beneficial effects of this invention are: 1. The present invention provides a negative pressure suction hole on the clamp. Since the clamp is located directly below the molten solder, and the negative pressure suction hole continuously forms a low-pressure zone on the inner side of the clamp, the molten solder is also subjected to a downward negative pressure suction force. Thus, the solder flows downward under the combined action of its own gravity and the negative pressure suction force at the suction hole. Therefore, the downward flow of the solder is better, which can effectively penetrate the wire and fully fill the space between the wire and the terminal. Therefore, the soldering connection between the wire and the terminal is better.

[0018] 2. This invention incorporates a heat dissipation cavity on the gripper. During operation, cool air flows in from the air inlet, rapidly passes through the area containing the heat dissipation cavity, and exits from the air outlet. This carries away heat from the area containing the heat dissipation cavity, lowering its temperature. Due to heat transfer, the temperature at the corresponding location on the conductor is lower than at other locations. Therefore, the molten solder, upon reaching this location, experiences a significant reduction in fluidity and gradually solidifies. This protects the conductor's insulation, preventing damage. Furthermore, it prevents the molten solder from flowing further down to the negative pressure extraction hole, thus preventing the hole from becoming clogged with molten solder.

[0019] 3. This invention incorporates a temperature detection module and a proportional flow divider valve. During operation, the temperature of the terminals is monitored in real time, allowing for adaptive adjustment of the branch openings of the proportional flow divider valve at the outlet and the negative pressure extraction port. When the surface temperature of the terminals exceeds the upper limit, the temperature detection module communicates with the proportional flow divider valve, increasing the branch opening at the outlet and decreasing the branch opening at the negative pressure extraction port. The increased speed of the cold air flowing through the heat dissipation chamber allows more heat to be carried away from the area of ​​the heat dissipation chamber of the gripper per unit time, further reducing the temperature in that area. This helps to cope with the high temperature of the molten solder, preventing further downward heat transfer. The branch opening at the negative pressure extraction port is also reduced, decreasing the negative pressure suction at the negative pressure extraction hole to prevent the molten solder from flowing downwards too quickly and being sucked into the negative pressure extraction hole. Conversely, when the surface temperature of the terminals is below the lower limit, the temperature detection module communicates with the proportional flow divider valve, decreasing the branch opening at the outlet and increasing the branch opening at the negative pressure extraction port. Therefore, the speed at which cold air flows through the heat dissipation cavity slows down, and the temperature drop rate in the area where the heat dissipation cavity is located by the clamps decreases. This is to cope with the cooling of the molten solder and prevent the fluidity of the molten solder from decreasing too much due to the temperature drop. At the same time, the branch opening at the negative pressure suction port is increased, which increases the negative pressure suction at the negative pressure hole, thereby increasing the downward flow of the molten solder and ensuring that the molten solder can penetrate the wire and fully fill the space between the wire and the terminal. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of a welding device for conductive terminals according to the present invention; Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle; Figure 3 for Figure 1 Side view; Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 5 This is an isometric view of a welding apparatus for conductive terminals according to the present invention. Figure 6 for Figure 5 A magnified schematic diagram of the structure at point C; Figure 7 for Figure 1 Top view; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point D; Figure 9 This is a schematic diagram of the connection structure of the grippers in a welding device for conductive terminals according to the present invention. Figure 10 for Figure 9 A magnified schematic diagram of the structure at point E in the middle; Figure 11 for Figure 9 Side view; Figure 12 for Figure 11 FF section view; Figure 13 for Figure 12 A magnified schematic diagram of the structure at point G.

[0021] in: 100. Machine tool; 200. Electromagnetic heater; 210. Electromagnetic heating coil; 220. Second linear drive element; 230. Water cooling module; 231. Cooling water inlet pipe; 232. Cooling water outlet pipe; 300. Feeder; 310. Guide tube; 320. Third linear drive element; 400. Fixture; 410. Gripper; 411. Negative pressure suction chamber; 412. Negative pressure suction hole; 413. Negative pressure suction port; 414. Heat dissipation chamber; 415. Air inlet; 416. Air outlet; 500, Card slot; 510, Notch / groove; 600, Drive assembly; 610, First linear drive element; 620, Hinge rod; 710. Terminal block; 720. Wire; 800, solder wire. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] The following reference Figures 1-13 This invention describes a welding apparatus for conductive terminals.

[0026] A welding apparatus for conductive terminals, used for soldering wires 720 and terminals 710.

[0027] The welding equipment for the conductive terminals includes a machine base 100, an electromagnetic heater 200, a feeder 300, and a clamp 400. The electromagnetic heater 200 is mounted on the machine base 100 and can move vertically. The feeder 300 is mounted on the machine base 100 and is located directly above the electromagnetic heater 200. The clamp 400 includes two grippers 410, which are rotatably connected to the machine base 100 around the same axis. Both grippers 410 have a negative pressure suction chamber 411 inside, and a plurality of negative pressure suction holes 412 are evenly distributed on the inner side of the grippers 410, while a negative pressure suction port 413 is distributed on the outer side.

[0028] In use, the operator places the wire 720 with the terminal 710 partially soldered between the two clamps 410, and then closes the two clamps 410 to hold the wire 720. Next, the electromagnetic heater 200 is moved vertically downward to a preset position, and then energized to heat the corresponding positions of the terminal 710 and the wire 720. At the same time, negative pressure is drawn outward from the negative pressure extraction port 413. At this time, air on the inner side of the clamps 410 continuously enters the negative pressure extraction chamber 411 through the negative pressure extraction hole 412, and then exits the negative pressure extraction chamber 411 through the negative pressure extraction port 413, thus continuously creating a low-pressure area on the inner side of the clamps 410. Next, the feeder 300 feeds the solder wire 800 downwards. Since the lead wire 720 has been heated by the electromagnetic heater 200, the solder wire 800 is fed downwards and comes into contact with the upper surface of the lead wire 720. The solder wire 800 melts due to the heat. The molten solder flows downwards along the lead wire 720 under the action of gravity. In addition, since the gripper 410 is located directly below the molten solder and a low-pressure area is continuously formed on the inner side of the gripper 410, the molten solder is also subjected to a downward negative pressure suction. Thus, the molten solder flows downwards under the combined action of its own gravity and the negative pressure suction at the negative pressure hole 412. Therefore, the downward flow of the molten solder is better, which can effectively penetrate the lead wire 720 and fully fill the space between the lead wire 720 and the terminal 710. Therefore, the soldering connection between the lead wire 720 and the terminal 710 is better.

[0029] After the current wire 720 and terminal 710 are soldered together, the worker releases the clamp 410 and removes the soldered wire 720 along with the soldered terminal 710. Then, the next wire 720 with a loosely soldered terminal 710 is placed in the position of the clamp 410, and the clamp 410 is closed to clamp the wire 720. The above process is repeated to complete the soldering connection of the next wire 720 and terminal 710.

[0030] Specifically, a negative pressure air pump is connected to the negative pressure air extraction port 413.

[0031] When in use, start the negative pressure air pump to draw air outward, so that a low-pressure area is continuously formed at the negative pressure hole 412.

[0032] In a further embodiment, such as Figure 1 and Figure 2 As shown, a card holder 500 is provided on one side of the machine base 100 and directly below the electromagnetic heater 200, and a notch 510 is provided on the outer side of the card holder 500.

[0033] The notch 510 serves two purposes. First, it positions the wires 720, ensuring that each wire 720 is aligned with the electromagnetic heater 200, thus guaranteeing consistent heating intensity from the electromagnetic heater 200 to each wire 720. Second, it creates a "negative pressure airflow channel" between the gripper 410 and the upper surface of the wires 720, making the negative pressure generated at the negative pressure hole 412 more effective in drawing the molten solder downwards.

[0034] Furthermore, the card holder 500 is preferably made of high-temperature resistant synthetic resin or glass fiber reinforced plastic, which can insulate the heat from the electromagnetic heater 200 and prevent the heat from being lost too quickly or burning the machine 100.

[0035] In addition, by setting up a negative pressure hole 412, toxic gases generated during the melting of molten tin can be absorbed to protect the health of workers.

[0036] In a further embodiment, such as Figures 2-4 As shown, the upper surface of the gripper 410 is flush with the lower surface of the card holder 500.

[0037] Understandably, by making the upper surface of the gripper 410 flush with the lower surface of the card holder 500, a continuous "negative pressure airflow channel" can be formed between the gripper 410 and the card holder 500. This will further enhance the downward suction effect of the negative pressure generated at the negative pressure hole 412 on the molten solder.

[0038] In a further embodiment, such as Figures 9-13 As shown, a heat dissipation cavity 414 is also provided on the gripper 410 and above the negative pressure suction cavity 411. The heat dissipation cavity 414 is isolated from the negative pressure suction cavity 411. An air inlet 415 communicating with the heat dissipation cavity 414 is provided on one side of the outer side of the gripper 410, and an air outlet 416 communicating with the heat dissipation cavity 414 is provided on the other side.

[0039] After the clamping jaws 410 grip the wire 720, the electromagnetic heater 200 moves vertically downward to a preset position. Then, the electromagnetic heater 200 is energized to heat the terminal 710 and the wire 720. Simultaneously, the negative pressure extraction port 413 and the outlet 416 simultaneously draw out negative pressure. Air flowing in from the inlet 415 then rapidly flows through the area of ​​the heat dissipation cavity 414 and exits from the outlet 416, carrying away heat from the area of ​​the heat dissipation cavity 414 of the clamping jaws, thus lowering the temperature of that area. Furthermore, because the clamping jaws 410 grip the wire 720, the temperature at that location on the wire 720 is lower than at other locations due to heat transfer. Therefore, the molten solder, upon reaching this location, experiences reduced fluidity and gradually solidifies, thus protecting the insulation of the wire 720 and preventing damage to it. In addition, it can also prevent the molten solder from continuing to flow downwards to the location of the negative pressure hole 412, thereby preventing the negative pressure hole 412 from being blocked by the molten solder.

[0040] Furthermore, the heat dissipation cavity 414 is provided with several heat dissipation fins at intervals to increase the heat exchange area and accelerate heat dissipation.

[0041] Furthermore, to improve the cooling speed, a cold air source can be connected to the air inlet 415, allowing cold air to flow through the heat dissipation cavity 414 to improve cooling efficiency.

[0042] In a further embodiment, a welding device for conductive terminals further includes a proportional flow divider valve. One branch input of the proportional flow divider valve is connected to the air outlet 416, and the other branch input is connected to the negative pressure suction port 413. The output of the proportional flow divider valve is connected to a negative pressure suction pump. A temperature detection module is also provided on the machine base 100 for detecting the temperature of the terminal 710, and the temperature detection module is signal-connected to the proportional flow divider valve. When the temperature detection module detects that the surface temperature of the terminal 710 is higher than the upper limit, the temperature detection module communicates with the proportional flow divider valve to increase the branch opening at the air outlet 416 and decrease the branch opening at the negative pressure suction port 413. When the temperature detection module detects that the surface temperature of the terminal 710 is lower than the lower limit, the temperature detection module communicates with the proportional flow divider valve to decrease the branch opening at the air outlet 416 and increase the branch opening at the negative pressure suction port 413.

[0043] When in use, start the negative pressure air pump. Under the negative pressure suction of the negative pressure air pump, the air at the negative pressure hole 412 is drawn into the negative pressure air extraction chamber 411, and the air at the air outlet 416 is drawn into the heat dissipation chamber 414. The two streams of air enter the proportional flow divider valve from the two branches, merge in the proportional flow divider valve, and then flow out from the main branch of the proportional flow divider valve into the negative pressure air pump, and then are discharged by the negative pressure air pump.

[0044] During this process, the temperature detection module monitors the temperature at terminal 710 in real time. When the surface temperature of terminal 710 exceeds the upper limit, the temperature detection module communicates with the proportional flow divider valve to increase the branch opening at outlet 416 and decrease the branch opening at negative pressure extraction port 413. As a result, the speed at which cold air flows through the heat dissipation cavity 414 increases, and more heat in the area of ​​the heat dissipation cavity 414 of the gripper 410 is carried away by the cold air per unit time. The temperature in the area of ​​the heat dissipation cavity 414 of the gripper 410 further decreases to cope with the high temperature of the molten solder and prevent the heat from being further transferred downwards. Simultaneously, the branch opening at negative pressure extraction port 413 is reduced, decreasing the negative pressure suction at negative pressure extraction hole 412 to prevent the molten solder from flowing downwards too quickly and being sucked into negative pressure extraction hole 412.

[0045] Conversely, when the surface temperature of terminal 710 is below the lower limit, the temperature detection module communicates with the proportional flow divider valve to reduce the branch opening at the air outlet 416 and increase the branch opening at the negative pressure suction port 413. This slows the flow of cold air through the heat dissipation cavity 414, reducing the rate of temperature drop in the area where the clamp 410's heat dissipation cavity 414 is located, thus mitigating the decrease in the temperature of the molten solder and preventing its fluidity from decreasing too much due to temperature drop. Simultaneously, increasing the branch opening at the negative pressure suction port 413 increases the negative pressure suction at the negative pressure suction hole 412, increasing the downward flow of the molten solder and ensuring it can penetrate the wire 720 and fully fill the space between the wire 720 and terminal 710.

[0046] The temperature at the corresponding positions of terminal block 710 and wire 720 may vary. It should be noted that the optimal heating temperature required will differ for different batches of materials (different specifications of terminal block 710 and wire 720). Furthermore, soldering is mostly done manually, so the clamping time for individual workpieces will also vary. Therefore, the temperature at the corresponding positions of terminal block 710 and wire 720 may become too high or too low, resulting in excessively high or low solder temperatures.

[0047] Specifically, the temperature detection module is preferably a non-contact temperature sensor such as an infrared thermometer or an infrared temperature sensor.

[0048] Specifically, the proportional flow divider valve is an electromagnetic proportional flow divider valve, which can control the opening degree of its two branches through electrical signals.

[0049] In a further embodiment, such as Figure 3 As shown, a welding device for conductive terminals also includes a drive assembly 600 for controlling the opening or closing of two grippers 410.

[0050] In a further embodiment, such as Figures 4-8As shown, the linear drive source includes a first linear drive element 610 and hinge rods 620. The fixed end of the first linear drive element 610 is located at the bottom of the machine base 100. One end of each of the two hinge rods 620 is hinged to the telescopic end of the first linear drive element 610 at a single point. The other ends of each of the two hinge rods 620 are respectively hinged to two grippers 410.

[0051] When the gripper 410 needs to clamp the wire 720, the telescopic end of the first linear drive element 610 extends, driving the two hinge rods 620 to move synchronously. The two hinge rods 620 push the corresponding gripper 410 to rotate around the hinge point of the gripper 410, thereby bringing the movable ends of the two grippers 410 closer to each other and clamping the wire 720.

[0052] When the gripper 410 needs to release the wire 720, the telescopic end of the first linear drive element 610 is retracted, which drives the two hinge rods 620 to move synchronously. The two hinge rods 620 pull the corresponding gripper 410 to rotate around the hinge point of the gripper 410, thereby moving the movable ends of the two grippers 410 away from each other, thus releasing the wire 720.

[0053] Specifically, the linear drive source can be any one of a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0054] In a further embodiment, such as Figure 3 As shown, the electromagnetic heater 200 includes an electromagnetic heating coil 210, a second linear drive element 220, and a water cooling module 230. The fixed end of the second linear drive element 220 is mounted on the machine base 100, and the electromagnetic heating coil 210 is mounted on the telescopic end of the second linear drive element 220. The water cooling module 230 is used to cool the electromagnetic heating coil 210 after it is heated and energized.

[0055] When it is necessary to heat the terminal 710 and the corresponding wire 720, the telescopic end of the second linear drive element 220 moves downward, driving the electromagnetic heating coil 210 to move downward synchronously until the electromagnetic heating coil 210 moves to the preset position. Then the electromagnetic heating coil 210 is energized. At this time, the electromagnetic heating coil 210 is located on the outer ring of the terminal 710 and the corresponding wire 720. Under the action of eddy current, the temperature of the terminal 710 and the corresponding wire 720 rises rapidly, thereby achieving the heating of the terminal 710 and the corresponding wire 720.

[0056] After the terminal block 710 and wire 720 are soldered together, the water cooling module 230 is activated to quickly cool the electromagnetic heating coil 210 to prevent it from overheating. Then, the telescopic end of the second linear drive element 220 is moved upward, causing the electromagnetic heating coil 210 to return to its initial position.

[0057] Specifically, the second linear drive element 220 is any one of a cylinder, a hydraulic rod, or an electric telescopic rod.

[0058] In a further embodiment, such as Figures 3-5 As shown, the water-cooled module 230 includes a water chiller, a cooling water inlet pipe 231, and a cooling water outlet pipe 232. The cooling water inlet pipe 231 is connected to one end of the electromagnetic heating coil 210, and the cooling water outlet pipe 232 is connected to the other end of the electromagnetic heating coil 210. The cooling water outlet of the water chiller is connected to the end of the cooling water outlet pipe 232 away from the electromagnetic heating coil 210, and the cooling water return port of the water chiller is connected to the end of the cooling water outlet pipe 232 away from the electromagnetic heating coil 210.

[0059] When it is necessary to cool down the electromagnetic heating coil 210, the water chiller is started, and the cooling water flows into the electromagnetic heating coil 210 from the cooling water inlet pipe 231. The cooling water absorbs heat during the flow inside the electromagnetic heating coil 210, which lowers the temperature of the electromagnetic heating coil 210. Finally, the cooling water flows back into the water chiller through the cooling water outlet pipe 232.

[0060] In a further embodiment, such as Figure 3 As shown, the feeder 300 includes a solder wire spool, a motor, a wire feeding wheel, a guide tube 310, and a third linear drive element 320. The fixed end of the third linear drive element 320 is mounted on the machine base 100. The guide tube 310 is fixedly connected to the telescopic end of the third linear drive element 320, and the guide tube 310 is located directly above the electromagnetic heating coil 210. The solder wire 800 is inserted into the guide tube 310. The solder wire spool is rotatably connected to the machine base 100. The motor is mounted on the machine base 100, and the output end of the motor is coaxially fixedly connected to the solder wire spool. There are two wire feeding wheels, which are spaced apart within the machine base 100, for conveying the solder wire 800 outward.

[0061] When feeding solder wire 800 downwards, the motor starts for a preset time, driving the solder wire reel to rotate for the preset time, feeding the solder wire 800 out a preset length. Simultaneously, the feeding wheel rotates, feeding the solder wire 800 outwards. At the same time, the telescopic end of the third linear drive element 320 moves downwards, driving the guide tube 310 downwards. The guide tube 310 and solder wire 800 move downwards together until the solder wire 800 contacts the upper end face of the wire 720. During reset, the telescopic end of the third linear drive element 320 resets, driving the guide tube 310 upwards. During the upward movement of the guide tube 310, it straightens the solder wire 800 it passes through, ensuring that this portion of the solder wire 800 is located at the exact center of the wire 720.

[0062] Specifically, the wire feeding wheel is also connected to a motor to control its rotation.

[0063] Specifically, the third linear drive element 320 is any one of an electric telescopic rod, a pneumatic cylinder, or a hydraulic cylinder.

[0064] In a further embodiment, a welding apparatus for conductive terminals also includes a foot pedal control switch, which is communicatively connected to the entire control system of the welding apparatus.

[0065] In use, after the operator places the wire 720 into the notch 510, the operator steps on the foot pedal control switch. After the control system receives the electrical signal, it controls the first linear drive element 610 to start first, clamping the wire 720 through the gripper 410. Next, it controls the second linear drive element 220 to start, causing the electromagnetic heating coil 210 to move down to the preset position. Then, it controls the electromagnetic heater 200 to be energized, and at the same time controls the negative pressure vacuum pump to start.

[0066] After welding is completed, the worker steps on the foot pedal control switch again. After receiving the electrical signal, the control system stops the negative pressure air pump, stops the electromagnetic heating coil 210 from being powered, and resets the first linear drive element 610 and the second linear drive element 220. At this time, the worker can remove the welded wire 720 along with the terminal 710. Finally, the worker starts the water chiller to cool the electromagnetic heating coil 210.

[0067] The specific working process of the welding equipment for conductive terminals provided by the present invention is described in conjunction with the above embodiments: A wire 720 with a poorly soldered terminal 710 is placed between two clamps 410, and the two clamps 410 are closed to hold and fix the wire 720. Subsequently, the electromagnetic heater 200 is moved vertically downward to a preset position and energized to heat the corresponding welding positions of the terminal 710 and the wire 720. Simultaneously, a negative pressure suction pump is activated, causing air at the inner surface of the clamps 410 to continuously enter the negative pressure suction chamber 411 through the negative pressure suction hole 412 and then be discharged through the negative pressure suction port 413, thereby continuously forming a low-pressure area at the inner surface of the clamps 410. Next, the feeder 300 feeds the solder wire 800 downwards. The solder wire 800 comes into contact with the upper surface of the heated wire 720 and melts. The molten solder flows downwards under its own weight and the negative pressure suction at the negative pressure hole 412, thereby enhancing the downward flow of the solder and allowing the solder to effectively penetrate the wire 720 and fully fill the space between the wire 720 and the terminal 710, thus completing the solder connection.

[0068] During the welding process, a heat dissipation chamber 414 is formed on the gripper 410 above the negative pressure suction chamber 411. The heat dissipation chamber 414 is isolated from the negative pressure suction chamber 411. An air inlet 415 communicating with the heat dissipation chamber 414 is formed on one side of the gripper 410, and an air outlet 416 communicating with the heat dissipation chamber 414 is formed on the other side. While the electromagnetic heater 200 is energized, negative pressure is simultaneously drawn outward from the negative pressure suction port 413 and the air outlet 416. Air flows in from the air inlet 415 and quickly flows through the heat dissipation chamber 414 before being discharged from the air outlet 416, thereby carrying away the heat in the area where the gripper 410 and the heat dissipation chamber 414 are located, and reducing the temperature of that area. Since the clamp 410 is clamped on the wire 720, the temperature at the corresponding position of the wire 720 is lower than that at other positions due to heat transfer. When the molten solder flows to this position, its fluidity decreases due to the cold and it gradually solidifies, thereby protecting the insulation of the wire 720 and preventing damage to the insulation. At the same time, it prevents the molten solder from continuing to flow downward to the negative pressure hole 412 and causing blockage.

[0069] After soldering is completed, release the clamp 410 and remove the soldered wire 720 along with the soldered terminal 710. Then place the next wire 720 with a poorly soldered terminal 710 at the clamp 410. Repeat the above process to continuously complete the soldering connection of multiple wires 720 and terminals 710.

[0070] To further optimize welding temperature control, a proportional flow divider valve and a temperature detection module are installed. One branch input of the proportional flow divider valve is connected to the air outlet 416, and the other branch input is connected to the negative pressure extraction port 413. The output of the proportional flow divider valve is connected to the negative pressure extraction pump. The temperature detection module is used to detect the temperature of the terminal 710 and is connected to the proportional flow divider valve signal. When the temperature detection module detects that the surface temperature of the terminal 710 is higher than the upper limit, the temperature detection module communicates with the proportional flow divider valve to increase the branch opening at the air outlet 416 and decrease the branch opening at the negative pressure extraction port 413. This increases the speed at which cold air flows through the heat dissipation cavity 414, carrying away more heat and reducing the temperature of the clamp 410 to cope with the high-temperature molten solder. At the same time, it reduces the negative pressure suction at the negative pressure extraction port 412 to prevent the molten solder from flowing downwards too quickly and being sucked into the negative pressure extraction port 412. When the temperature detection module detects that the surface temperature of the terminal 710 is lower than the lower limit, the temperature detection module communicates with the proportional flow divider valve to reduce the branch opening at the air outlet 416 and increase the branch opening at the negative pressure suction port 413. This slows down the flow of cold air through the heat dissipation cavity 414 and slows down the temperature drop of the gripper 410, preventing the molten solder from becoming too fluid due to the temperature drop. At the same time, it increases the negative pressure suction at the negative pressure suction hole 412 to enhance the downward flow of the molten solder, ensuring that the molten solder can penetrate the wire 720 and fully fill the space between the wire 720 and the terminal 710.

[0071] The welding operation can be semi-automated via a foot pedal control switch: After the worker places the wire 720 inside the notch 510, they step on the foot pedal control switch. The control system then activates the first linear drive element 610, which clamps the wire 720 using the gripper 410. Subsequently, the second linear drive element 220 is activated, causing the electromagnetic heating coil 210 to move to a preset position. The electromagnetic heater 200 is then energized, and the negative pressure vacuum pump is activated simultaneously. After welding, the worker steps on the foot pedal control switch again. The control system then stops the negative pressure vacuum pump, de-energizes the electromagnetic heating coil 210, and resets the first and second linear drive elements 610 and 220. The worker can then remove the welded wire 720. Finally, the control system activates a water chiller to cool the electromagnetic heating coil 210.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A welding device for conductive terminals, used for soldering wires and terminals, characterized in that, A welding apparatus for conductive terminals includes: Machine tool; An electromagnetic heater is mounted on the machine base and can move vertically. The feeder is mounted on the machine base and located directly above the electromagnetic heater; The fixture includes two grippers that are rotatably connected to the machine base about the same axis. Both grippers have negative pressure suction chambers inside, and several negative pressure suction holes are evenly distributed on the inner side of the grippers, while negative pressure suction ports are distributed on the outer side.

2. The welding equipment for conductive terminals according to claim 1, characterized in that, A card holder is provided on one side of the machine and directly below the electromagnetic heater, and a notch is provided on the outer side of the card holder.

3. The welding equipment for conductive terminals according to claim 2, characterized in that, The upper surface of the gripper is flush with the lower surface of the card holder.

4. The welding equipment for conductive terminals according to claim 1 or 3, characterized in that, A heat dissipation chamber is also provided on the gripper and above the negative pressure suction chamber. An air inlet is provided on one side of the gripper and connected to the heat dissipation chamber, and an air outlet is provided on the other side and connected to the heat dissipation chamber.

5. The welding equipment for conductive terminals according to claim 4, characterized in that, It also includes a proportional flow divider valve, one branch input of which is connected to the air outlet, and the other branch input is connected to the negative pressure suction port. The output of the proportional flow divider valve is connected to the negative pressure suction pump. The machine is also equipped with a temperature detection module to detect the temperature of the wiring terminals, and the temperature detection module is connected to the signal of the proportional flow divider valve. When the temperature detection module detects that the surface temperature of the wiring terminal is higher than the upper limit, the temperature detection module communicates with the proportional flow divider valve to increase the branch opening at the air outlet and decrease the branch opening at the negative pressure air extraction port. When the temperature detection module detects that the surface temperature of the wiring terminal is lower than the lower limit, the temperature detection module communicates with the proportional flow divider valve to reduce the branch opening at the air outlet and increase the branch opening at the negative pressure air extraction port.

6. The welding equipment for conductive terminals according to claim 1, characterized in that, A welding apparatus for conductive terminals also includes a drive assembly for controlling the opening or closing of two grippers.

7. The welding equipment for conductive terminals according to claim 6, characterized in that, The linear drive source includes a first linear drive element and hinge rods. The fixed end of the first linear drive element is located at the bottom of the machine base. The same end of the two hinge rods is hinged to the telescopic end of the first linear drive element at a point. The other ends of the two hinge rods are respectively hinged to two grippers.

8. The welding equipment for conductive terminals according to claim 1, characterized in that, The electromagnetic heater includes an electromagnetic heating coil, a second linear drive element, and a water cooling module. The fixed end of the second linear drive element is mounted on the machine base, the electromagnetic heating coil is mounted on the telescopic end of the second linear drive element, and the water cooling module is used to cool the electromagnetic heating coil after it is heated and energized.

9. The welding equipment for conductive terminals according to claim 8, characterized in that, The water-cooled module includes a water chiller, a cooling water inlet pipe, and a cooling water outlet pipe. The cooling water inlet pipe is connected to one end of the electromagnetic heating coil, and the cooling water outlet pipe is connected to the other end of the electromagnetic heating coil. The cooling water outlet of the water chiller is connected to the end of the cooling water outlet pipe furthest from the electromagnetic heating coil, and the cooling water return port of the water chiller is connected to the end of the cooling water outlet pipe furthest from the electromagnetic heating coil.

10. The welding equipment for conductive terminals according to claim 1, characterized in that, The feeder includes a solder wire spool, a motor, a guide tube, a wire feeding wheel, and a third linear drive element. The fixed end of the third linear drive element is mounted on the machine base. The guide tube is fixedly connected to the telescopic end of the third linear drive element and is located directly above the electromagnetic heating coil. The solder wire is inserted into the guide tube. The solder wire spool is rotatably connected to the machine base. The motor is mounted on the machine base, and the output end of the motor is coaxially fixedly connected to the solder wire spool. There are two wire feeding wheels, spaced apart inside the machine base, used to convey the solder wire outward.

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