Instant heating type welding device and welding method

Abstract

The invention relates to the technical field of high-speed wire welding, in particular to an instant heating type welding device and a welding method. Comprising a welding electrode and a lifting mechanism, the welding electrode comprises a positive electrode and a negative electrode, the small end of the positive electrode is connected with the small end of the negative electrode to form a heating part, the heating part is provided with an abutting groove matched with a to-be-welded wire and used for preventing the wire from sideslip, and the heating part is used for transmitting heat energy to the wire through resistance heat effect heating; the lifting mechanism is used for vertically moving the welding electrode in a telescopic mode, so that the abutting groove of the welding electrode abuts against the wire and is tightly pressed on the soldering tin on the bonding pad. When the wire abuts against the soldering tin, the soldering tin is heated, melted and cooled to be welded with the wire, and a gap is formed between the heating part and the soldering tin when the wire abuts against the soldering tin through the heating part. The small ends of the positive electrode and the negative electrode are connected to form a heating part, the abutting groove abuts against a wire on soldering tin, power-on heat generation and heat dissipation are fast, welding can be fast, welded elements on the other face of the bonding pad are not affected, efficiency is high, and great popularization value is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-speed wire welding, in particular to a quick-heating type welding device and welding method. BACKGROUND

[0002] High-speed wire welding is mostly hot-pressing tin welding. The existing welding method is to process the conductor into a piece, press the conductor and then heat it by electricity, and heat is transferred to the copper wire and the solder pad by heat conduction, so that the tin on the solder pad is melted and connected to the copper wire. This method is convenient to operate and can weld multiple solder pads at one time, but it has defects in process. Because the size of the resistance press head is large, in order to heat it to the required temperature and make the heat uniform, slow heating is needed to ensure that the temperature of each part of the press head rises uniformly. This way will cause the heat to be transferred to the high-speed wire PE coating through the copper wire and melt it. Because the high-speed wire solder pad is mostly double-sided welded, when welding the A surface, the heat transfer will cause the PCB board to heat up due to long heating time, causing the copper wire that has been welded on the B surface to fall off due to heat. Therefore, a welding process is needed to ensure stable welding temperature while meeting the requirements of short heating time and fast cooling speed. SUMMARY

[0003] The purpose of the present application is to solve the problems in the background art and provide a quick-heating type welding device and welding method.

[0004] The technical scheme adopted by the present application is as follows: a quick-heating type welding device, which comprises, a welding electrode, the welding electrode comprises a positive electrode and a negative electrode, the small end of the positive electrode is connected with the small end of the negative electrode to form a heating part, the heating part is provided with a pressing groove adapted to the wire to be welded to prevent the wire from sliding sideways, and the heating part is used to heat the wire by resistance heating effect and transfer heat energy to the wire; a lifting mechanism, the lifting mechanism is used to vertically move the welding electrode up and down, so that the pressing groove of the welding electrode abuts against the wire and presses the solder tin on the solder pad; when the wire abuts against the solder tin, the solder tin is heated and melted and then cooled and welded with the wire, and a gap is provided between the wire and the solder tin when the wire abuts against the solder tin.

[0005] Further, the positive electrode and the negative electrode are fixed to the insulating layer and the negative electrode on the other side of the insulating layer to form a whole with a pressing load to adapt to the pressing of the wire, and the positive electrode and the negative electrode are narrowed at the same end and connected to form the heating part after extending out of the insulating layer.

[0006] Further, the same end of the positive electrode and the negative electrode is in a tapered structure, the tapered ends of the two electrodes are connected to form the heating part, and the pressing groove is provided on the end face of the heating part; and the insulating layer is on the symmetry line of the pressing groove.

[0007] Further, the welding electrode is a whole shaft with a tapered end, and an insulation groove is formed in the whole shaft along the axial direction of the whole shaft, with one end of the insulation groove extending out of the end face of the whole shaft and the other end of the insulation groove ending at the tapered end of the whole shaft, so that the two sides of the insulation groove form a positive electrode and a negative electrode connected at the tapered end of the whole shaft respectively; and an insulation layer is arranged in the insulation groove.

[0008] Further, the tapered end of the whole shaft is a heating part with an end face, and a concave pressing groove is arranged on the end face.

[0009] Further, the servo moving mechanism for moving the lifting mechanism laterally is further included; the servo moving mechanism includes a motor, a guide slide, and a screw nut mechanism connected to the output shaft of the motor, and the lifting mechanism is arranged at the moving end of the screw nut mechanism, the guide slide is slidably connected with the lifting mechanism, and the guide slide is used to provide a guide function.

[0010] Further, the screw nut mechanism includes a screw rod and a nut block threadedly connected to the screw rod; the nut block is slidably abutted with the guide slide; and the fixed end of the lifting mechanism is arranged on the nut block.

[0011] Further, the nut block and the guide slide are provided with a guide sliding groove for cooperation and sliding, and a guide sliding block is coupled and slid in the guide sliding groove.

[0012] Further, the moving end of the servo moving mechanism is provided with a fixing frame, the fixing frame is provided with a sensing part, the two ends of the guide slide are provided with sensors, and the sensors are used to sense the sensing part to limit the continuous movement of the moving end.

[0013] Further, the moving end of the servo moving mechanism is provided with a mounting plate, the mounting plate is provided with a plurality of lifting mechanisms, the lifting ends of the lifting mechanisms are connected with welding electrodes, and the pressing grooves of the welding electrodes on the plurality of lifting mechanisms are adapted to be clamped with wires of different thicknesses.

[0014] Further, the welding electrode is slidably arranged at the lifting end of the lifting mechanism, and an elastic part and a pressure sensor for measuring the pressure between the welding electrode and the lifting end are arranged between the welding electrode and the lifting end; and the lifting mechanism stops moving the welding electrode downward when the pressure value detected by the pressure sensor is not less than a preset pressure threshold value.

[0015] Further, a visual positioning system and a controller are further included, the visual positioning system is used to obtain position information of the welding station including the wire, the welding electrode and the solder; and the controller is used to control the servo moving mechanism to move the lifting mechanism laterally by a movement amount, so that the pressing groove is located above the wire or above the solder, according to the relative positional relationship among the welding electrode, the wire and the solder.

[0016] Further, a conveying mechanism is further included, and the conveying mechanism is used to move the solder pad longitudinally to the welding station.

[0017] Another aspect of the present application also provides a soldering method for soldering wires, using the instant soldering device provided by the present application, the method comprising, The transverse movement of the lifting mechanism makes the pressing groove of the soldering electrode correspondingly located above the wire; When the wire is above the corresponding solder, the soldering electrode is pressed to make the wire abut against the solder; The soldering electrode is electrified to make the heating part heat and melt the solder through the wire; After the solder is melted, the power is cut off to make the solder cool and solidify with the wire.

[0018] According to the soldering method for soldering wires provided by the present application, the method further comprises, When the wire is not above the corresponding solder, the transverse movement of the lifting mechanism makes the pressing groove of the soldering electrode correspondingly located above the wire; the soldering electrode is lowered to clamp the wire through the pressing groove; the soldering electrode after clamping the wire is raised and the soldering electrode is transversely moved to make the wire above the corresponding solder.

[0019] According to the soldering method for soldering wires provided by the present application, the method that the transverse movement of the lifting mechanism makes the pressing groove of the soldering electrode correspondingly located above the wire comprises, The position information of the soldering electrode and the wire is obtained through the visual positioning system, and the controller adjusts and controls the movement amount of the lifting mechanism moved by the servo movement mechanism according to the relative position relationship between the soldering electrode and the wire to make the pressing groove of the soldering electrode correspondingly located above the wire.

[0020] According to the soldering method for soldering wires provided by the present application, the method that the soldering electrode after clamping the wire is raised and the soldering electrode is transversely moved to make the wire above the corresponding solder comprises, The position information of the solder and the soldering electrode or the wire is obtained through the visual positioning system, and the controller adjusts and controls the movement amount of the lifting mechanism moved by the servo movement mechanism according to the relative position relationship between the solder and the soldering electrode or the wire to make the wire above the corresponding solder.

[0021] The present application has the following beneficial effects: 1. The lifting mechanism is used to lift and move the soldering electrode, the pressing groove of the soldering electrode abuts the wire against the solder, the small end of the positive electrode is connected with the small end of the negative electrode to form a heating part, the heating part abuts the wire against the solder through the pressing groove, the heating part heats to transmit heat energy to the solder through the wire to melt the solder, the pressing groove can prevent the wire from sliding sideways after the solder is melted, the solder is cooled and solidified with the wire after the power is cut off to complete the soldering, the soldering type heating part has a gap with the solder to avoid the soldering electrode sticking to the solder; the electrified cross section of the heating part is small, the heating is fast, the electrified time is short, the cooling is also fast, the wire can be quickly soldered, and the elements on the other side of the solder pad have been soldered without affecting them. 2. The positive electrode and the negative electrode are connected as a whole to facilitate the installation of the lead wire on the lifting end of the lifting mechanism, and the middle is insulated through the insulating layer to reduce the current cross-section size of the positive and negative electrodes, ensure the advantages of fast heating and fast cooling, and narrow the heating end of the welding electrode to facilitate the reduction of the size of the heating part, which is beneficial to the rapid transfer of heat energy to the lead wire; 3. The position of the welding electrode can be adjusted by laterally moving the lifting mechanism through the servo moving mechanism, which facilitates the adjustment of the position of the welded lead wire corresponding to the solder, and simultaneously welds multiple lead wires on the corresponding solder, thereby improving the welding efficiency; 4. The sensor can sense the sensing element, the sensing element is arranged at both ends of the guide slide and marked as the maximum amount of transverse movement, and the movement of the motor is triggered when the sensing element is sensed, so as to stop or reverse rotation, thereby avoiding the nut block from slipping off the screw rod or the rigid contact of the components from damaging the servo moving mechanism, and the servo moving mechanism is less laborious compared with the rigid abutment limiting; 5. The mounting plate is provided with multiple lifting mechanisms, multiple welding electrodes are respectively arranged on the multiple lifting mechanisms, and the welding electrodes provided with the clamping and pressing grooves for clamping lead wires of different specifications are respectively arranged on the multiple lifting mechanisms, the corresponding welding electrode is selected for welding according to the thickness of the lead wire during welding, and the welding electrode has high universality; 6. The welding electrode is slidably arranged on the lifting end of the lifting mechanism, and the elastic element and the pressure sensor are arranged between the welding electrode and the lifting end, so that the lead wire can be flexibly clamped to avoid deformation of the lead wire caused by pressure, the pressure sensor can detect the abutting force between the welding electrode and the lead wire, and the force of the lead wire pressing the solder can be controlled, so that the welding quality has high consistency; 7. The position information of the lead wire, the welding electrode and the solder in the welding station is obtained through the visual positioning system, the controller controls the lateral movement amount of the moving end of the servo moving mechanism according to the relative position information, realizes accurate movement, aligns the pressing groove of the welding electrode above the lead wire or above the solder, and realizes automatic welding, thereby improving the work efficiency; 8. The welding method of the welding lead wire fully utilizes the structural characteristics of the instant heating type welding device, and after the transversely moving welding electrode is located above the lead wire, the lead wire is directly pressed downward when the lead wire is above the corresponding solder, the lead wire is abutted on the solder, the heating part with a small current cross-section generates heat quickly to melt the solder, the solder is quickly cooled and solidified with the lead wire after power-off, the welding is completed, the rapid welding is realized, and other welded parts are not affected; 9. The welding method can also adjust the position of the lead wire, after the lead wire is clamped by the low-pressure groove of the welding electrode, the lead wire is lifted, the lead wire is located above the corresponding solder after the welding electrode is laterally moved, the lead wire is abutted on the solder after the lead wire is pressed downward, and then the lead wire is welded after power-on, the lead wire is separated from the pressing groove after the lead wire is solidified with the solder, the next lead wire can be continuously welded, and poor quality welding caused by the non-correspondence between the position of the lead wire and the solder is avoided; 10. The position information within the welding station is obtained through a vision positioning system. The lateral displacement of the welding electrode is determined based on the relative position. The servo moving mechanism is then controlled to move the welding electrode precisely above the wire or the solder, thereby achieving automated welding.

[0022] The present invention relates to an instantaneous welding device in which a small end of the positive electrode of the welding electrode is connected to a small end of the negative electrode to form a heating element. A pressure groove is used to hold the wire against the solder to prevent the wire from slipping. After the heating element is energized, it heats up and transfers heat energy through the wire to melt the solder. The heating element has a small energized cross-section, heats up quickly, has a short energization time, and cools down quickly, enabling rapid welding without affecting components already welded on the other side of the pad. It is easy to use and has great potential for widespread application. Attached Figure Description

[0023] Figure 1 : A schematic diagram of the structure of this instantaneous welding device; Figure 2 : Side view of the instantaneous welding device; Figure 3 : Schematic diagram of the guide slide connecting mounting plate; Figure 4 : A schematic diagram of a structure with multiple lifting mechanisms mounted on a mounting plate; Figure 5 : A schematic diagram of the lifting mechanism equipped with elastic elements and pressure sensors; Figure 6 : A schematic diagram of the welding electrode connected to the welding power supply lifting mechanism; Figure 7 :for Figure 6 An enlarged structural diagram of part A in the diagram; Figure 8 :for Figure 7 An enlarged structural diagram of part B in the diagram; Figure 9 : A schematic diagram of the structure of the welding electrode in the separated state with the wire and solder; Wherein: 1-Welding electrode; 11-Positive electrode; 12-Negative electrode; 13-Heating element; 14-Pressure groove; 15-Insulation layer; 2-Lifting mechanism; 21-Clamp; 22-Elastic element; 23-Pressure sensor; 3-Soldering pad; 31-Solder; 4-Servo moving mechanism; 41-Motor; 42-Guide slide; 421-Guide groove; 43-Lead screw; 44-Nut block; 441-Guide slider; 45-Fixing frame; 46-Mounting plate; 47-Sensing element; 48-Sensor; 5-Vision positioning system; 6-Conveying mechanism; 7-Wire; 8-Welding power supply. Detailed Implementation

[0024] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components have the same or similar designations throughout the several disclosed embodiments. The embodiments described below are exemplary in nature, the drawings are not drawn to scale, and are intended to be illustrative, but not limiting of the present application.

[0025] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0027] The present application will be further described below in detail in conjunction with the drawings and specific embodiments.

[0028] When the high-speed wire is welded with the pad 3, the exposed wire 7 of the high-speed wire is correspondingly located on the solder 31 of the pad 3, the wire 7 and the solder 31 are crimped and heated, the solder 31 is cooled after melting, the wire 7 and the pad 3 are fixed together to complete the welding.

[0029] The present application relates to a kind of instant heating type welding device, for welding wire 7 and pad 3, by lifting mechanism 2 lifting movement welding electrode 1, make welding electrode 1's resistance groove 14 with wire 7 abut on solder 31, the small end of positive electrode 11 and the small end of negative electrode 12 are connected to form heating part 13, heating part 13 passes through resistance groove 14 and makes wire 7 abut on solder 31, heating part 13 passes through wire 7 after heating and makes solder 31 melt, resistance groove 14 can prevent wire 7 from sliding after solder 31 melts, solder 31 is cooled and fixed with wire 7 after power off, complete welding, welding type heating part 13 and solder 31 have gap, can avoid welding electrode 1 stick on solder 31;The current-carrying section of heating part 13 is small, heats up fast, and the current-carrying time is short, can be only powered on 150 ms, cooling is also fast, realize fast welding, do not affect the element that pad 3 another side has welded, with great popularization value.

[0030] A kind of instant heating welding device, specifically, as Figures 1-9 As shown in the figure, it includes welding electrode 1 and lifting mechanism 2, welding electrode 1 includes positive electrode 11 and negative electrode 12, the small end of positive electrode 11 is connected with the small end of negative electrode 12 to form heating part 13, heating part 13 is provided with the pressing groove 14 adapted to the wire 7 to be welded for preventing the wire 7 from sliding, and heating part 13 is used to heat by resistance heat effect and transfer heat energy to wire 7;Lifting mechanism 2 is used to vertically extend and retract welding electrode 1, so that the pressing groove 14 of welding electrode 1 is in contact with wire 7 and is pressed on the solder 31 on pad 3;Wire 7 is in contact with solder 31, so that solder 31 is heated and melted, and after cooling, wire 7 is welded together with solder 31, and heating part 13 is provided with a gap between wire 7 and solder 31 when wire 7 is in contact with solder 31.

[0031] After the pressing groove 14 of welding electrode 1 is coupled to wire 7, the bottom end of wire 7 is located outside the end face of welding electrode 1, so that welding electrode 1 is in contact with solder 31 and has a gap when wire 7 is in contact with solder 31. The pressing groove 14 is preferably an arc-shaped groove adapted to clamp wire 7, and the arc-shaped groove can be designed to have a radius smaller than the radius of the corresponding wire 7 to clamp wire 7;The central angle of the arc-shaped groove is preferably about 180 degrees;The arc-shaped grooves of different welding electrodes 1 are respectively adapted to clamp wires 7 of different thickness specifications.

[0032] In some embodiments, as Figures 7-9 As shown in the figure, an insulating layer 15 is provided between positive electrode 11 and negative electrode 12, and the insulating layer 15 and the negative electrode 12 and positive electrode 11 on both sides of the insulating layer 15 are fixedly connected as a whole with a pressing load, such as a pressing column or a pressing block, which has a certain support strength in the pressing direction and is suitable for pressing wire 7, and the positive electrode 11 and the negative electrode 12 are narrowed at the same direction end and extend out of the insulating layer 15 to form the heating part 13, so that the current-carrying cross section of the heating part 13 is small, the overall volume of the heating part 13 is small, the heating part 13 heats up quickly after electrification, and cools down quickly after power-off, so that only 150 ms of electrification can be achieved, and the heat generated by the heating part 13 is transferred to the solder 31 through the wire 7 to melt, cool and solidify the wire 7 into one body.

[0033] Based on the same direction end of the positive electrode 11 and the negative electrode 12 being narrowed and extending out of the insulating layer 15 to form the heating part 13, as Figures 7-9 As shown in the figure, the same direction end of the positive electrode 11 and the negative electrode 12 is in a tapered structure, and the tapered end of the two electrodes is connected to form the heating part 13, and the end face of the heating part 13 is provided with the pressing groove 14.

[0034] In some preferred embodiments, as Figure 9 As shown in the figure, the insulating layer 15 is symmetrical about the pressing groove 14, that is, the pressing groove 14 is symmetrical about the insulating layer 15, so that the position of the pressing groove 14 can be positioned by the position information of the welding electrode 1.

[0035] As Figures 7-9 shown, the welding electrode 1 is a whole shaft with a tapered end, an insulation groove is formed in the whole shaft along the axial direction of the whole shaft, the insulation groove extends out of the end face of the whole shaft at one end and stops at the tapered end of the whole shaft at the other end, so that the two sides of the insulation groove form a positive electrode 11 and a negative electrode 12 connected at the tapered end of the whole shaft respectively; the insulation groove is provided with an insulation layer 15; the tapered end of the whole shaft is a heating portion 13 with an end face, and the end face is provided with a concave pressing groove 14; that is, the welding electrode 1 has a tapered end, the heating portion 13 is arranged at the tapered end of the welding electrode 1, and the end face of the whole tapered end is provided with the pressing groove 14. The welding electrode 1 is a whole shaft, which can bear the load, facilitate grooving and filling of the insulation layer 15 to form the welding electrode 1 with the heating portion 13.

[0036] Optionally, the insulation layer 15 is an insulating glue, which is used to adhesively connect the positive electrode 11 and the negative electrode 12, so as to not only have an insulation effect, but also firmly connect the positive electrode 11 and the negative electrode 12 into a whole body with a certain supporting strength, which is suitable for crimping the wire 7. The insulation layer 15 is preferably a high-temperature-resistant insulating glue, which does not affect the adhesion effect of the insulating glue after being heated, and the overall strength of the welding electrode 1 is unchanged.

[0037] In some embodiments, as Figures 1-2 shown, the instant heating welding device further comprises a servo moving mechanism 4 for moving the lifting mechanism 2 laterally; in one specific scheme, the servo moving mechanism 4 comprises a motor 41, a guide sliding seat 42, a screw nut mechanism connected in transmission with the output shaft of the motor 41, and the lifting mechanism 2 is arranged at the moving end of the screw nut mechanism, the guide sliding seat 42 is slidably connected with the lifting mechanism 2 for providing a guide function. The motor 41 is in transmission with the screw rod 43, which can be achieved by meshing transmission of the driving gear on the output shaft with the driven gear on the screw rod 43; preferably, the driving pulley is fixedly arranged on the output shaft of the motor 41, and the screw rod 43 is driven by the driven pulley through the annular transmission belt; the relative sliding between the pulley and the transmission belt is allowed to avoid damage to the servo moving mechanism 4 under extreme displacement limitation.

[0038] In one specific scheme of the screw nut mechanism, the screw nut mechanism comprises a screw rod 43 and a nut block 44 threadedly connected with the screw rod 43; the nut block 44 is slidably abutted with the guide sliding seat 42; the fixed end of the lifting mechanism 2 is arranged on the nut block 44.

[0039] As Figure 3As shown, to improve the stability of the movement of the nut block 44, the nut block 44 and the guide slide block 42 are provided with a guide groove 421 that slides together, and a guide slider 441 that slides coupled within the guide groove 421. The guide groove 421 is provided on the guide slide block 42 and the guide slider 441 is provided on the nut block 44, or the guide groove 421 is provided on the nut block 44 and the strip-shaped guide slider 441 is provided on the guide slide block 42. The guide slider 441 is coupled within the guide groove 421 to provide guidance and stability for the nut block 44 to move axially along the lead screw 43. Preferably, such as Figure 3 As shown, the nut block 44 and the guide slide 42 are provided with multiple sets of guide sliders 441 and guide grooves 421 for cooperation.

[0040] The instantaneous heating welding device also includes a servo moving mechanism 4, such as... Figures 2-3 As shown, the moving end of the servo moving mechanism (such as the nut block 44) is equipped with a fixed frame 45. The fixed frame 45 has a U-shaped structure, and the upper and lower ends of the mounting plate 46 are fixed to the U-shaped arm to improve stability. The fixed frame 45 is equipped with a sensor 47, and the guide slide 42 is equipped with sensors 48 at both ends. These sensors are used to sense the sensor 47 to limit the continued movement of the moving end, that is, to limit the moving end from continuing to move in the original direction of movement. The sensor 48 can sense the sensor 47 when the fixed frame 45 moves to the end of the guide slide 42 along with the moving end. The sensor 47 is marked at both ends of the guide slide 42 with the maximum lateral movement. When the sensor 47 is sensed, it triggers the action of the motor 41 to stop or reverse the rotation, preventing the nut block 44 from slipping off the lead screw 43 or the components from rigidly contacting and damaging the servo moving mechanism 4. Compared with the lateral movement of the rigidly abutting and limiting nut block 44, the servo moving mechanism 4 suffers less wear and tear.

[0041] The instantaneous heating welding device also includes a servo moving mechanism 4, such as... Figures 2-4 As shown, the moving end of the servo moving mechanism is equipped with a mounting plate 46, and multiple lifting mechanisms 2 are mounted on the mounting plate 46. The lifting ends of the lifting mechanisms 2 are connected to welding electrodes 1. The pressing grooves 14 of the welding electrodes 1 on the multiple lifting mechanisms 2 are adapted to clamp wires 7 of different thicknesses. Multiple lifting mechanisms 2 are respectively equipped with multiple welding electrodes 1. Welding electrodes 1 with pressing grooves for clamping wires 7 of different thicknesses are respectively set on multiple lifting mechanisms 2. During welding, the corresponding welding electrode 1 is selected according to the thickness of the wire 7, which has high versatility.

[0042] like Figure 4 As shown, the mounting plate 46 is provided with two lifting mechanisms 2, and the telescopic ends of the two lifting mechanisms 2 are provided with welding electrodes 1. The pressing grooves 14 of the two welding electrodes 1 are of different sizes, which can be adapted to clamp two different specifications and thicknesses of wires 7 for welding.

[0043] In one embodiment, such asFigure 5 As shown, the welding electrode 1 is slidably arranged on the lifting end of the lifting mechanism 2, and the elastic member 22 and the pressure sensor 23 for measuring the pressure between the welding electrode 1 and the lifting end are arranged between the welding electrode 1 and the lifting end, and the lifting mechanism 2 stops the downward movement of the welding electrode 1 when the pressure value detected by the pressure sensor 23 is not less than the preset pressure threshold. The lifting mechanism 2 can be selected to be a telescopic cylinder such as a pneumatic cylinder and an oil cylinder, which is vertically arranged on the mounting plate 46, and the telescopic rod is detachably connected to the welding electrode 1 at the bottom end. The telescopic movement of the telescopic cylinder can be controlled by the controller, the welding electrode 1 is slidably arranged on the lifting end of the lifting mechanism 2, and the elastic member 22 and the pressure sensor 23 are arranged between the welding electrode 1 and the lifting end, which can flexibly clamp the wire 7 to avoid the wire 7 being deformed due to pressure to cause defective products, the pressure sensor 23 can detect the abutting force between the welding electrode 1 and the wire 7, and the force of the wire 7 abutting against the solder 31 can be controlled, so that the welding quality has higher consistency.

[0044] In some embodiments, the instant heating welding device of the present application further comprises a visual positioning system 5 and a controller, the visual positioning system 5 is used to obtain the position information of the welding station including the wire 7, the welding electrode 1 and the solder 31; the controller is used to control the transverse movement amount of the lifting mechanism 2 moved by the servo moving mechanism 4 according to the transverse relative position relationship of the welding electrode 1, the wire 7 and the solder 31, so that the abutting groove 14 is located above the wire 7 or above the solder 31. The position information of the wire 7, the welding electrode 1 and the solder 31 in the welding station is obtained by the visual positioning system 5, and the controller controls the transverse movement amount of the moving end of the servo moving mechanism 4 according to the relative position information, so as to realize accurate movement, align the abutting groove 14 of the welding electrode 1 above the wire 7 or above the solder 31, and realize automatic welding and improve work efficiency.

[0045] In a preferred embodiment, as shown in Figure 1 The instant heating welding device further comprises a conveying mechanism 6, which is used to longitudinally move the solder pad 3 to the welding station, and the conveying mechanism 6 can be used in cooperation with the servo moving mechanism 4 to adjust the wire 7 to be located on the solder 31 for welding.

[0046] In one specific application, the servo moving mechanism 4 comprises a motor 41, a screw rod 43 connected to the output shaft of the motor 41, a nut block 44 threadedly connected to the screw rod 43, the screw rod 43 being rotatably arranged on a guide slide 42, and a fixed frame 45 being fixedly arranged on the nut block 44, the fixed frame 45 being fixedly connected to the same mounting plate 46 at the top and bottom ends, a plurality of lifting mechanisms 2 being transversely and spacedly arranged on the mounting plate 46, a clamp 21 being slidably arranged on the lifting end of each lifting mechanism 2, a spring and a pressure sensor 23 being arranged between the clamp 21 and the lifting end, a plurality of welding electrodes 1 being clamped on the plurality of clamps 21, the arc-shaped groove of the welding electrode 1 being suitable for different specifications and thicknesses of the wire 7; one end of the welding electrode 1 is in a tapered structure, the positive electrode 11 and the negative electrode 12 are integrally connected by heat-resistant insulating adhesive, the same end of the positive electrode 11 and the negative electrode 12 is narrowed into a tapered structure, and extends beyond the insulating adhesive to be connected together to form a heating part 13, and the end surface of the heating part 13 is provided with an arc-shaped groove for clamping the wire 7; the visual positioning system 5 is arranged on the mounting plate 46; the conveying mechanism is longitudinally arranged with one end located at the welding station.

[0047] In another aspect of the present application, a welding method for welding the wire 7 is also provided, which uses the instant heating type welding device provided by the present application, and the welding method comprises the following steps, S1, the lifting mechanism 2 is moved transversely so that the pressing groove 14 of the welding electrode 1 is located above the wire 7; the transverse movement of the welding electrode 1 and the longitudinal movement of the solder pad 3 can be controlled by the controller according to the position information provided by the visual positioning system 5, so as to control the moving direction and the moving amount of the servo moving mechanism 4 and the conveying mechanism 6; S2, when the wire 7 is above the corresponding solder 31, the welding electrode is pressed down to make the wire 7 abut against the solder 31; S3, the welding electrode 1 is electrified to make the heating part 13 heat and melt the solder 31 through the wire 7; after the wire 7 is pressed against the corresponding solder 31 by the welding electrode 1, the controller controls the welding power supply 8 to briefly electrify the welding electrode 1 through the copper cable, the welding power supply 8 is used to control the current and output direct current to adapt to the rapid heating of the welding electrode 1, such as direct current above 800A, so that the heating part 13 heats through the resistance effect, and since the electrification is brief, the electrification cross section of the heating part 13 is small, the heating is fast, and the contact surface of the arc-shaped groove quickly transmits heat to the solder 31 through the wire 7 to melt the solder 31; S4, after the solder 31 is melted (including partially melted), the power is turned off to cool the solder 31 and solidify the wire 7. After the power is turned off, the volume of the heating part 13 is small, the heat dissipation is fast, the solder 31 is cooled and solidified with the wire 7 and the solder pad 3 to complete the welding, and there is no influence on other welding points on the solder pad 3; the controller controls the lifting mechanism 2 to move the welding electrode 1 upward, since the wire 7 is solidified with the solder 31, the clamping force of the pressing groove 14 and the wire 7 is smaller than the welding connecting force, the wire 7 is separated from the pressing groove 14 when the welding electrode 1 moves upward, and the welding of the next point can be continued.

[0048] The welding method of the welding wire 7 of the present application makes full use of the structural characteristics of the instant heating type welding device of the present application, and after the transverse movement of the welding electrode 1 to the position above the wire 7, the wire 7 is directly pressed by the welding electrode 1 to abut against the solder 31, the current is passed to make the heating part 13 with a small current section generate heat rapidly to melt the solder 31, and after the power is turned off, the solder 31 is rapidly cooled to be solidified with the wire 7 to complete the welding, which can realize rapid welding without affecting the other welded parts.

[0049] The welding method of the welding wire 7 of the present application further comprises the following steps, S5, when the wire 7 is not above the corresponding solder 31, the lifting mechanism 2 is transversely moved to make the abutting groove 14 of the welding electrode 1 correspond to the position above the wire 7; the welding electrode 1 is lowered to clamp the wire 7 through the abutting groove 14; the welding electrode 1 after clamping the wire 7 is raised and the welding electrode 1 is transversely moved to make the wire 7 above the corresponding solder 31. After the wire 7 is correspondingly positioned above the solder 31, the subsequent welding is carried out according to the above steps S2-S4.

[0050] In some cases, after the solder pad 3 and the wire 7 are transported to the welding station, there is a deviation in the corresponding position, and the wire 7 is not vertically above the corresponding solder 31, for example, the wire 7 is bent to the side, the visual positioning system 5 can be used to position the wire 7, the servo moving mechanism 4 transversely moves the lifting mechanism 2 to make the abutting groove 14 of the welding electrode 1 above the wire 7, the lifting mechanism 2 lowers the welding electrode 1 to clamp the wire 7 through the abutting groove 14, and after the wire 7 is raised, the transverse relative position between the wire 7 and the solder 31 is taken as the displacement amount, the controller controls the servo moving mechanism 4 to transversely move the welding electrode 1 to make the wire 7 above the corresponding solder 31, and the subsequent welding operation is carried out.

[0051] The position of the wire 7 can also be adjusted through the step S5, after the wire 7 is clamped by the low pressure groove of the welding electrode 1 and the wire 7 is raised, the welding electrode 1 is transversely moved to make the wire 7 above the corresponding solder 31, and then the wire 7 is pressed to abut against the solder 31, and then the wire 7 is welded by passing the current, after the wire 7 is solidified with the solder 31, the welding electrode 1 is raised to separate the wire 7 from the abutting groove 14, and the next wire 7 can be continuously welded, which avoids poor welding caused by the non-corresponding position of the wire 7 and the solder 31.

[0052] The welding method of the welding wire 7 of the present application, in the step S1, the method of transversely moving the lifting mechanism 2 to make the abutting groove 14 of the welding electrode 1 correspond to the position above the wire 7 comprises, S11, the position information of the welding electrode 1 and the wire 7 is obtained through the visual positioning system 5, and the controller controls the servo moving mechanism 4 to move the lifting mechanism 2 according to the relative position relationship between the welding electrode 1 and the wire 7 to make the abutting groove 14 of the welding electrode 1 correspond to the position above the wire 7.

[0053] According to the welding method of the welding wire 7 provided by the application, in the step S5, the welding electrode 1 after clamping the wire 7 is moved upward and the welding electrode 1 is moved transversely, so that the wire 7 is located above the solder 31, which comprises the following steps. S51, the position information of the solder 31 and the welding electrode 1 or the wire 7 is acquired by the visual positioning system 5, and the controller controls the servo moving mechanism 4 to move the lifting mechanism 2 according to the relative position relationship between the solder 31 and the welding electrode 1 or the wire 7, so that the wire 7 is located above the solder 31.

[0054] The basic principles, main features and advantages of the application are shown and described above. It should be understood by those skilled in the art that the application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the application. Without departing from the spirit and scope of the application, various changes and improvements can be made to the application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. An instant heat welding device characterized by: Comprising, The welding electrode comprises a positive electrode and a negative electrode, and the thin end of the positive electrode is connected with the thin end of the negative electrode to form a heating part, and the heating part is provided with a pressing groove adapted to the to-be-welded wire to prevent the wire from sliding sideways, and the heating part is used to heat the wire by the resistance heating effect to transfer heat energy to the wire; The lifting mechanism is used to vertically and telescopically move the welding electrode, so that the pressing groove of the welding electrode abuts against the solder tin on the pad and is pressed on the solder tin; The wire is welded with the solder tin after the solder tin is heated and melted and then cooled, and the heating part is provided with a gap between the wire and the solder tin when the wire abuts against the solder tin.

2. A heat-and-seal device as claimed in claim 1, characterized in that: The positive electrode and the negative electrode are fixedly connected to form a whole with a pressing load, and the whole is adapted to press the wire, and the positive electrode and the negative electrode are narrowed at the same end and extend out of the insulating layer to be connected to form the heating part.

3. A heat-and-seal device as claimed in claim 2, characterized in that: The welding electrode is a whole shaft with a tapered end, and an insulating groove is formed in the shaft along the axial direction of the shaft, one end of the insulating groove extends out of the end face of the whole shaft, and the other end of the insulating groove stops at the tapered end of the whole shaft, so that the positive electrode and the negative electrode connected at the tapered end of the whole shaft are formed on the two sides of the insulating groove, respectively.

4. A heat-and-seal device as claimed in claim 1, characterized in that: The servo moving mechanism further comprises a motor, a guide slide, and a screw nut mechanism connected with the output shaft of the motor, and the lifting mechanism is arranged at the moving end of the screw nut mechanism; the guide slide is slidably connected with the lifting mechanism to provide a guide function.

5. A heat-and-seal device as claimed in claim 4, characterized in that: The moving end of the servo moving mechanism is provided with a mounting plate, and a plurality of lifting mechanisms are arranged on the mounting plate; the lifting end of each lifting mechanism is connected with a welding electrode, and the pressing grooves of the welding electrodes on the plurality of lifting mechanisms are adapted to clamp wires of different thicknesses.

6. A heat sink welding device as defined in claim 1, wherein: The welding electrode is slidably arranged at the lifting end of the lifting mechanism, and an elastic member and a pressure sensor for measuring the pressure between the welding electrode and the lifting end are arranged between the welding electrode and the lifting end; the lifting mechanism stops moving downward when the pressure value detected by the pressure sensor is not less than a preset pressure threshold.

7. A device as claimed in any one of claims 1 to 6, wherein: The visual positioning system is used to obtain the position information of the welding station including the wire, the welding electrode, and the solder tin; and the controller is used to control the servo moving mechanism to move the lifting mechanism laterally by a movement amount, so that the pressing groove is located above the wire or above the solder tin, according to the relative positional relationship among the welding electrode, the wire, and the solder tin.

8. A soldering method of soldering a wire, characterized by: The method comprises, The lifting mechanism is moved laterally to make the pressing groove of the welding electrode correspondingly located above the wire; When the wire is above the corresponding solder tin, the welding electrode is pressed downward to make the wire abut against the solder tin; The welding electrode is electrified to make the heating part heat and melt the solder tin through the wire; After the solder tin is melted, the welding electrode is de-energized to make the solder tin cool and solidify with the wire.

9. A method of soldering wires as defined in claim 8, characterized in that: The method further comprises, When the wire is not above the corresponding solder tin, the lifting mechanism is moved laterally to make the pressing groove of the welding electrode correspondingly located above the wire; The welding electrode is moved downward to clamp the wire through the pressing groove; The welding electrode after clamping the wire is moved upward and laterally to make the wire above the corresponding solder tin.

10. The method of claim 8, wherein: The method for moving the lifting mechanism laterally to make the pressing groove of the welding electrode correspondingly located above the wire comprises, The position information of the welding electrode and the wire is acquired by a visual positioning system, and the controller controls the servo moving mechanism to move the lifting mechanism according to the relative position relationship between the welding electrode and the wire, so that the pressing groove of the welding electrode is located above the wire.

Images