Automatic brazing device and method for very fine wires and conductors

Abstract

The application relates to an automatic brazing device for ultra-fine metal wires and conductors, which comprises a fixed support, a welding unit and an automatic feeding and discharging unit. The fixed support is a hollow cuboid structure with an open front face, and two rectangular windows are arranged on the left and right sides below the bottom. The welding unit is connected to the upper layer inside the fixed support, and the automatic feeding and discharging unit is connected to the bottom layer inside the fixed support and the left and right sides outside the fixed support. The welding unit comprises an air pipe, a laser controller, a laser transmission channel, a laser heating and melting mechanism, a high-precision visual identification system, a molten solder spraying mechanism, a high-precision mechanical motion module and a solder heating melter. The application realizes continuous automatic non-contact brazing between the metal wires and the conductors by adopting the scheme of contacting and pressing the metal wires and the conductors, heating and melting the solder by means of a non-contact laser heat source and setting a preset offset welding point position, and effectively controls the welding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to an automatic brazing device and method of very fine wire and wire, belonging to the technical field of automatic brazing of wire and wire. BACKGROUND

[0002] The bridge wire type initiating explosive generally forms an electric bridge by brazing very fine metal wires and wires or pins, and completes the predetermined function by applying current to heat and ignite the propellant. The brazing of metal wires and wires or pins is a high-precision operation, and the size of the bridge wire used for welding is usually Φ(0.01-0.15) mm. The length of the bridge wire and the size of the welding spot are controlled to ensure that the bridge resistance is within a reasonable range.

[0003] At present, the brazing process of very fine metal wires and wires or pins is all manual contact brazing operation. The solder is melted along the iron head after preheating the welding point of the wire by contact with the soldering iron, and the solder fully wets, diffuses and combines with the surface of the metal wire and wire under the action of the flux, and forms an intermetallic welding object after cooling, forming a fixed welding spot.

[0004] The above process uses raw materials such as wires, metal wires and fluxes, and the operator completes the operation under bright daylight lamps with a soldering iron, a magnifying glass and a resistance tester. With the increase in the number and batches of products, a number of operators have been manually soldering for many years, which is mechanical and inefficient. During the soldering heating process, the operator is in close contact with the volatile flux for a long time, which poses a certain risk to occupational health. In addition, the metal wire is very thin, with a size of (0.01-0.15) mm, and the brazing of the metal wire and the wire needs to be carried out under close-range light irradiation, which requires high visual acuity of the operator and is difficult to control the consistency of the welding. Long-term observation of very fine metal wires under light can easily lead to visual fatigue and cause visual decline in the operator. Therefore, it is necessary and urgent to explore and find an automatic brazing method for very fine metal wires and wires to replace manual operation.

[0005] After extensive research and review of patent literature, there is little automatic brazing of metal wires and wires, and only a few articles have not fundamentally solved the above problems.

[0006] Chinese patent CN201520477824.8, a bridge wire welding system for producing electrode plugs, adopts a welding head that moves downward to contact the bridge wire to be welded and the welding part to be welded, completes the welding process, and then the welding head is lifted upward. The next welding part is driven by the pushing device to reach the welding head directly below, and the welding head continues to perform the next welding operation vertically downward, thus forming a cycle to realize automatic welding. However, this welding method still cannot get rid of the contact between the welding head and the object to be welded, and the welding head may stick to the solder when in contact, which cannot control the amount of soldering.

[0007] Chinese patent CN201220245187.8 entitled rigid electric ignition element bridge wire automatic welding system, its working principle and Chinese patent CN201520477824.8 in the welding head contact type welding method is exactly the same, still not out of contact with the welding head and the object to be welded, there is contact when the welding head adheres to the solder, can not control the soldering tin amount.

[0008] Chinese patent CN201520477809.3 entitled a bridge wire positioning device and containing the bridge wire welding system of the device, describes is to rely on the wire pressing wheel to limit the bridge wire to be welded in and out of the point position downward, the structure of positioning constraint. The welding part adopts the contact type welding method, still not out of contact with the welding head and the object to be welded, there is contact when the welding head adheres to the solder, can not control the soldering tin amount.

[0009] Chinese patent CN201811141480.8 entitled a bridge wire laser welding method, adopts laser as heating heat source to heat the welding point position with high energy, completes the subsequent welding operation. The process because the laser energy density is larger, the point position direct heating effect will cause the bridge wire to produce high thermal stress, there is the risk of damaging the bridge wire, is not conducive to the welding quality control. SUMMARY

[0010] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide an automatic brazing device and method for extremely thin metal wires and wires, which contacts and pressurizes the metal wires and wires, melts the solder by means of a non-contact laser heat source, sets a preset offset welding point position, and completes continuous automatic non-contact brazing between the metal wires and wires, thereby effectively controlling the welding quality.

[0011] The technical solution of the present application is:

[0012] An automatic brazing device for extremely thin metal wires and wires, comprising a fixed support, a welding unit and an automatic feeding and discharging unit,

[0013] The fixed support is a hollow rectangular structure with an open front, two rectangular windows are opened on the left and right sides near the bottom;

[0014] The welding unit is connected to the upper layer inside the fixed support, and the automatic feeding and discharging unit is connected to the bottom layer inside the fixed support and the left and right sides outside the fixed support;

[0015] The welding unit comprises an air pipe, a laser controller, a laser transmission channel, a laser heating and melting mechanism, a high-precision visual identification system, a molten solder spraying mechanism, a high-precision mechanical motion module and a solder heating and melting device,

[0016] The high-precision mechanical movement module is fixed on the top surface of the frame and is divided into X, Y and Z axis modules, and the laser heating and melting mechanism is fixedly installed on the X axis module; two holes are formed in the top of the laser heating and melting mechanism, and the air pipe and the laser transmission channel are sealingly connected to the two holes; the air pipe is connected to the external air source; the laser transmission channel is connected to the laser controller, and the laser controller is installed on the left inner surface of the fixed support; the high-precision visual identification system is installed below the laser heating and melting mechanism, and the tail end of the solder heating and melting device extends into the high-precision visual identification system; the solder heating and melting device is installed below the high-precision visual identification system.

[0017] The automatic feeding and discharging unit comprises a welding jig, an upper guide rail, an up-down conveying mechanism, a lifting platform and a lower guide rail.

[0018] The upper guide rail and the lower guide rail are provided with a groove in the middle of the top, and the guide rails are arranged in parallel and at equal intervals; the upper guide rail and the lower guide rail are respectively installed on the two sides of the rectangular window below the fixed support, and the two ends extend out of the fixed support, and the left end extends more than the right end; the welding jig is placed in the groove on the top of the upper guide rail and the lower guide rail; the up-down conveying mechanism is installed on the left and right sides of the fixed support and is fixed to the ground; the top of the up-down conveying mechanism is connected to the upper guide rail, but is lower than the bottom surface of the upper guide rail; the outer side of the up-down conveying mechanism is connected to the lower guide rail, and the lower guide rail extends into the up-down conveying mechanism and is connected to the lifting platform.

[0019] Further, the guide rail comprises a track, a driven wheel, a transmission belt, a pneumatic lifting mechanism, a lifting stop block, a discharging baffle, a driving wheel and a driving motor.

[0020] The driven wheel and the driving wheel are respectively installed on the inner surface of the track, and the transmission belt is connected to the driven wheel and the driving wheel; the driven wheel is connected to the track in the middle and is fixed to the rotating shaft of the driving motor, and the driving motor is installed on the outer side of the guide rail; the pneumatic lifting mechanism and the lifting stop block are installed in the middle of the track, and the discharging baffle is installed at the tail end of the track.

[0021] Further, the welding unit continuously performs welding 2-5 times at the same welding point by using multiple prefabricated tin materials of the same size.

[0022] Further, the welding energy is increased by 3%-12% each time to reach the state of being integrated with the tin layer.

[0023] Further, the high-precision visual identification system comprises a large rectangular frame and a small rectangular frame; the large rectangular frame fully covers the overlap area of the two wires to be welded and the metal wire; and the small rectangular frame covers the overlap area of the single wire to be welded and the metal wire.

[0024] Further, the welding point is determined by axially offsetting the preset welding point coordinate by 2D-4D distance, and D is the diameter of the solder ball.

[0025] Further, the welding jig comprises a constraint jig and a V-shaped groove, the V-shaped groove is opened on the edge of the constraint jig, and the wire to be welded is constrained.

[0026] An automatic soldering method of ultra-fine metal wires and wires comprises the following steps:

[0027] Step 1: the metal wires and wires are clamped and fixed by using a welding tool, the welding tool adopts a wire end constraint jig with a V-shaped groove to constrain the wires to be welded;

[0028] Step 2: the welding tool is placed on the upper guide rail, and automatic operation is started; when the welding tool reaches the center of the guide rail, the pneumatic jacking mechanism automatically jacks up the welding tool, and the upper surface is in contact with the jacking block;

[0029] Step 3: the coordinate recognition of the welding point is carried out, the large rectangular frame is used to cover the overlapping area of the two wires to be welded and the metal wire, and the small rectangular frame is used to cover the overlapping area of the single wire to be welded and the metal wire respectively;

[0030] The welding point is determined by axially offsetting the preset welding point coordinate by 2D-4D distance, and D is the diameter of the solder ball.

[0031] Step 4: continuous soldering is carried out, a plurality of preformed solder materials with the same size are used to continuously weld at the same welding point for 2-5 times, the welding energy is increased by 3%-12% each time, and the solder layer is ensured to be melted into one body;

[0032] Step 5: the product to be welded is clamped, the welding tool enters the upper and lower conveying mechanisms along the upper guide rail, the upper and lower conveying mechanisms convey the product to be welded along the lower guide rail to the upper guide rail, and then the next automatic welding is completed.

[0033] The straightened metal wire is pressed on the circular rubber pad along the direction perpendicular to the stripe by using the pressing block with equidistant stripes.

[0034] The straightened metal wire is continuously and equidistantly pressed by using a plurality of force pressing blocks, and the pressure is transmitted to the wire to be welded by the straightened metal wire.

[0035] Compared with the prior art, the present application has the following advantages:

[0036] (1) The present application can automatically discharge the solder by gravity, complete continuous discharging, melt under laser heating, fly out from the spraying mechanism to contact the welding point to complete soldering; it has the advantages of high operation efficiency, no manual intervention and high welding precision;

[0037] (2) the present application adopts multiple pressing blocks to continuously and equidistantly press the metal wires, the metal wires transmit (0.001-0.005) N pressure to the wires at the welding points, the contact length of the metal wires and the wires is long, the contact gap is small, the solder is filled and solidified at the gap between the metal wires and the wires, no abnormality such as virtual welding and shrinkage hole exists, and the welding is more firm;

[0038] (3) the present application adopts the preset welding point coordinate axis deviation mode, realizes automatic deviation of the melted solder from the welding point position by 2D-4D distance (D is the diameter of the tin ball), reduces the thermal stress and impact force generated by the moving solder directly acting on the welding point, avoids ablation damage of the metal wires, realizes lossless soldering, and simultaneously, under the action of the flux, the solder is wrapped at the lap joint position of the metal wires and the wires by the tension and flowability of the melted solder and the surface of the wires, the lap joint point is orderly regulated in the solder.

[0039] (4) the present application adopts multiple same-size prefabricated tin materials to continuously weld (2-5) times at the same welding point, the welding energy is gradually increased each time (the energy increase range is 3%-12%), the tin layers are melted into one body, and the welding firmness effect is gradually strengthened. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 it is a structural schematic diagram of the present application;

[0041] Figure 2 it is a schematic diagram of the upper and lower guide rail structure of the present application;

[0042] Figure 3 it is a schematic diagram of the wire end constraint of the present application;

[0043] Figure 4 it is a schematic diagram of the high-precision visual recognition system of the present application;

[0044] Figure 5 it is a schematic diagram of the continuous and equidistant pressure of the metal wires on the surface of multiple products;

[0045] Figure 6 it is a schematic diagram of the effective pressure of the metal wires. DETAILED DESCRIPTION

[0046] The present application is further described below in combination with examples.

[0047] An automatic soldering device for a very fine metal wire and a wire, as shown in Figures 1-6 , comprises a fixed support 1, a welding unit 2 and an automatic feeding and discharging unit 3,

[0048] The fixed support 1 is a hollow cuboid structure with an open front, two rectangular windows are opened on the left and right sides near the bottom.

[0049] The welding unit 2 is connected to the upper layer inside the fixed support 1, and the automatic feeding and discharging unit 3 is connected to the bottom layer inside and the left and right sides outside the fixed support;

[0050] The welding unit 2 comprises an air pipe 2-1, a laser controller 2-2, a laser transmission channel 2-3, a laser heating melting mechanism 2-4, a high-precision visual recognition system 2-5, a molten solder spraying mechanism 2-6, a high-precision mechanical movement module 2-7, and a solder heating melter 2-9,

[0051] The high-precision mechanical movement module 2-7 is fixed to the top surface inside the rack 1 and is divided into X, Y, and Z axis modules. The laser heating melting mechanism 2-4 is fixedly installed on the X axis module. The laser heating melting mechanism 2-4 has two holes on the top. The air pipe 2-1 and the laser transmission channel 2-3 are sealingly connected to the two holes. The air pipe 2-1 is connected to an external air source. The laser transmission channel 2-3 is connected to the laser controller 2-2. The laser controller 2-2 is installed on the left inner surface of the fixed support 1. The high-precision visual recognition system 2-5 is installed below the laser heating melting mechanism 2-4. The tail end of the solder heating melter 2-9 extends into the high-precision visual recognition system 2-5. The molten solder spraying mechanism 2-6 is installed directly below the high-precision visual recognition system 2-5.

[0052] The automatic feeding and discharging unit 3 comprises a welding jig 3-1, an upper guide rail 3-2, an up-and-down carrying mechanism 3-3, a lifting platform 3-3-1, and a lower guide rail 3-4.

[0053] The upper guide rail 3-2 and the lower guide rail 3-4 have a groove structure in the middle of the top. The guide rails are arranged in parallel and at equal intervals. The upper guide rail 3-2 and the lower guide rail 3-4 are respectively installed on the two sides of the rectangular window below the fixed support. The two ends extend out of the fixed support 1. The left end extends more than 5 times the distance of the right end. The welding jig 3-1 is placed in the groove on the top of the upper guide rail 3-2 and the lower guide rail 3-4. The up-and-down carrying mechanism 3-3 is installed on the left and right sides of the fixed support 1 and is fixed to the ground. The top of the up-and-down carrying mechanism is connected to the upper guide rail 3-2 but is lower than the bottom surface of the upper guide rail. The outer side of the up-and-down carrying mechanism is connected to the lower guide rail 3-4. The lower guide rail 3-4 extends into the up-and-down carrying mechanism 3-3 and is connected to the lifting platform 3-3-1.

[0054] The guide rail comprises a track 3-2-1, a driven wheel 3-2-2, a transmission belt 3-2-3, a pneumatic lifting mechanism 3-2-4, a lifting stop block 3-2-5, a discharging baffle 3-2-6, a driving wheel 3-2-7, and a driving motor 3-2-8.

[0055] The inner side of the track 3-2-1 is respectively provided with a driven wheel 3-2-2 and a driving wheel 3-2-7, a transmission belt 3-2-3 is connected to the driven wheel 3-2-2 and the driving wheel 3-2-7, the driven wheel 3-2-2 is centrally connected to the inner side of the track 3-2-1, the driven wheel is fixed on the rotating shaft of a driving motor 3-2-8, and the driving motor 3-2-8 is installed on the outer side of the guide rail; the track 3-2-1 is centrally provided with a pneumatic jacking mechanism 3-2-4 and a jacking block 3-2-5, and the tail end of the track 3-2-1 is provided with a discharging baffle 3-2-6.

[0056] The welding unit continuously performs welding 2-5 times at the same welding point by using multiple prefabricated soldering materials of the same size, and the welding energy is gradually increased each time.

[0057] As shown in Figure 4 The high-precision visual recognition system 2-5 includes a large rectangular frame 2-5-3 and a small rectangular frame 2-5-4, the large rectangular frame 2-5-3 fully covers the lap joint area of the two wires to be welded 2-5-5 and the metal wire 2-5-1, and the small rectangular frame 2-5-4 covers the lap joint area of the single wire to be welded 2-5-5 and the metal wire 2-5-1, respectively.

[0058] The high-precision visual recognition system 2-5 confirms the welding point coordinates, and determines the welding point position 2-5-2 by axially offsetting the preset welding point coordinates by a distance of 2D-4D, where D is the diameter of the solder ball.

[0059] The welding jig 3-1 includes a constraint jig 3-1-1 and a V-shaped groove 3-1-1-1, the V-shaped groove 3-1-1-1 is opened on the edge of the constraint jig 3-1-1, and the wire to be welded 3-1-1-2 is constrained.

[0060] The present application uses multiple force pressing blocks 3-1-2-1 to continuously and equally space press the straightened metal wire 3-1-2, and transmits a pressure of (0.001-0.005) N to the wire to be welded 3-1-2-3 through the straightened metal wire 3-1-2, so that the length of the contact between the metal wire and the wire is long, the contact gap is small, the solder is filled and solidified in the gap between the metal wire and the wire, and there is no abnormality such as virtual welding and shrinkage, and the welding is more firm. Figure 5 .

[0061] The present application uses a pressing block with equally spaced stripes 3-1-3-1 to press the straightened metal wire 3-1-3-2 on the circular rubber pad 3-1-3-3 in a direction perpendicular to the stripes, thereby increasing the pressing friction force and firmness of the metal wire. Figure 6 .

[0062] An automatic brazing method for a very fine metal wire and a wire, comprising:

[0063] Step 1: the metal wire and the conductor are clamped and fixed by using a welding tool, and the welding tool is constrained by a conductor end head constraint jig 3-1-1 with a V-shaped groove 3-1-1-1 to constrain the to-be-welded conductor 3-1-1-2;

[0064] Step 2: place the welding tool on the upper guide rail 3-2, start automatic operation, and the welding tool reaches the center of the guide rail, and the pneumatic jacking mechanism 3-2-4 automatically jacks up the welding tool, and the upper surface is in contact with the jacking stopper 3-2-5;

[0065] Step 3: to-be-welded point coordinate recognition is performed, a large rectangular frame 2-5-3 is used to cover the overlap area of the two to-be-welded conductors 2-5-5 and the metal wire 2-5-1, and a small rectangular frame 2-5-4 is used to cover the overlap area of the single to-be-welded conductor 2-5-5 and the metal wire 2-5-1 respectively;

[0066] The welding point 2-5-2 is determined by axially offsetting the preset welding point coordinate by 2D~4D distance, and D is the diameter of the tin ball;

[0067] Step 4: continuous soldering is performed, a plurality of prefabricated tin materials of the same size are used to continuously weld 2~5 times at the same welding point, the welding energy is increased by 3%~12% each time, and the tin layer is ensured to be melted into one body;

[0068] Step 5: clamp the to-be-welded product, the welding tool enters the upper and lower conveying mechanism 3-3 along the upper guide rail 3-2, the upper and lower conveying mechanism 3-3 conveys the to-be-welded product along the lower guide rail to the upper guide rail 3-2, and then the next automatic welding is completed.

[0069] The application can automatically discharge the solder by gravity, complete continuous discharge, melt under laser heating, fly out from the spraying mechanism to contact the to-be-welded point and complete soldering; has the advantages of high operation efficiency, no manual intervention and high welding precision.

[0070] Although the application has been disclosed as above with a preferred embodiment, it is not intended to limit the application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the application by using the disclosed methods and technical contents without departing from the spirit and scope of the application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the application, which does not deviate from the technical solutions of the application, belongs to the protection scope of the technical solutions of the application.

Claims

1. An automatic brazing device for fine wire and conductor, characterized by, The utility model relates to a welding device, including fixed support (1), welding unit (2) and automatic loading and unloading unit (3), The fixed support (1) is a hollow cuboid structure with an open front, two rectangular windows are opened on the left and right sides near the bottom, The welding unit (2) is connected to the upper layer inside the fixed support (1), and the automatic loading and unloading unit (3) is connected to the bottom layer inside the fixed support and the left and right sides outside the fixed support, The welding unit (2) includes an air pipe (2-1), a laser controller (2-2), a laser transmission channel (2-3), a laser heating and melting mechanism (2-4), a high-precision visual recognition system (2-5), a molten solder injection mechanism (2-6), a high-precision mechanical motion module (2-7), and a solder heating and melting device (2-9), The high-precision mechanical motion module (2-7) is fixed to the top surface inside the rack (1) and is divided into X, Y, and Z axis modules. The laser heating and melting mechanism (2-4) is fixedly installed on the X axis module. The laser heating and melting mechanism (2-4) has two holes on the top. The air pipe (2-1) and the laser transmission channel (2-3) are sealingly connected to the two holes. The air pipe (2-1) is connected to an external air source. The laser transmission channel (2-3) is connected to the laser controller (2-2). The laser controller (2-2) is installed on the left inner surface of the fixed support (1). The laser heating and melting mechanism (2-4) is installed with the high-precision visual recognition system (2-5) below. The tail end of the solder heating and melting device (2-9) extends into the high-precision visual recognition system (2-5). The molten solder injection mechanism (2-6) is installed directly below the high-precision visual recognition system (2-5). The automatic loading and unloading unit (3) includes a welding jig (3-1), an upper guide rail (3-2), an up-down conveying mechanism (3-3), a lifting platform (3-3-1), and a lower guide rail (3-4). The upper guide rail (3-2) and the lower guide rail (3-4) have a groove in the middle of the top. The guide rails are arranged in parallel and at equal intervals. The upper guide rail (3-2) and the lower guide rail (3-4) are installed on the two rectangular windows below the fixed support. The two ends of the guide rails extend out of the fixed support (1). The left end extends more than (5) times the length of the right end. The welding jig (3-1) is placed in the groove on the top of the upper guide rail (3-2) and the lower guide rail (3-4). The up-down conveying mechanism (3-3) is installed on the left and right sides of the fixed support (1) and is fixed to the ground. The top of the up-down conveying mechanism is connected to the upper guide rail (3-2) but is lower than the bottom surface of the upper guide rail. The outer side of the up-down conveying mechanism is connected to the lower guide rail (3-4). The lower guide rail (3-4) extends into the up-down conveying mechanism (3-3) and is connected to the lifting platform (3-3-1).

2. The apparatus according to claim 1, wherein The guide rail includes a track (3-2-1), a driven wheel (3-2-2), a transmission belt (3-2-3), a pneumatic lifting mechanism (3-2-4), a lifting stop block (3-2-5), a discharging baffle (3-2-6), a driving wheel (3-2-7), and a driving motor (3-2-8). The inside surface of the track (3-2-1) is respectively provided with a driven wheel (3-2-2) and a driving wheel (3-2-7), and a transmission belt (3-2-3) is connected to the driven wheel (3-2-2) and the driving wheel (3-2-7), the driven wheel (3-2-2) is centrally connected to the inside surface of the track (3-2-1), the driven wheel is fixed to the rotating shaft of a driving motor (3-2-8), and the driving motor (3-2-8) is installed on the outside of the guide rail; the track (3-2-1) is centrally provided with a pneumatic lifting mechanism (3-2-4) and a lifting stop block (3-2-5), and the tail end of the track (3-2-1) is provided with a discharging baffle (3-2-6).

3. The apparatus according to claim 1, wherein The welding unit continuously performs welding 2-5 times at the same welding point by using multiple prefabricated solder materials of the same size, and the welding energy is increased by 3-12% each time.

4. The apparatus according to claim 3, wherein The welding energy is increased by 3-12% each time to ensure that the tin layer is melted into one.

5. The apparatus for automatic brazing of an ultra-fine wire and a lead wire according to claim 1, wherein The high-precision visual identification system (2-5) includes a large rectangular frame (2-5-3) and a small rectangular frame (2-5-4), the large rectangular frame (2-5-3) fully covers the overlapping area of the two wires to be welded (2-5-5) and a metal wire (2-5-1), and the small rectangular frame (2-5-4) covers the overlapping area of the single wire to be welded (2-5-5) and the metal wire (2-5-1) respectively.

6. The apparatus for automatic brazing of an extremely fine wire to a conductor wire according to claim 1, wherein The high-precision visual identification system (2-5) confirms the welding point position (2-5-2) by confirming the welding point coordinates, and the welding point position (2-5-2) is determined by axially offsetting the preset welding point coordinates by 2D-4D distance, where D is the diameter of the tin ball.

7. The apparatus for automatic brazing of an ultra-fine wire and a lead wire according to claim 1, wherein The welding jig (3-1) includes a constraint jig (3-1-1) and a V-shaped groove (3-1-1-1), the V-shaped groove (3-1-1-1) is opened on the edge of the constraint jig (3-1-1), and the wire to be welded (3-1-1-2) is constrained.

8. A method of automatic brazing of ultrafine wires and conductors using the apparatus of claim 1, characterized in that, It comprises: Step 1: clamp and fix the metal wire and the wire by using the welding tool, the welding tool uses the wire end constraint jig (3-1-1) with a V-shaped groove (3-1-1-1) to constrain the wire to be welded (3-1-1-2); Step 2: place the welding tool on the upper guide rail (3-2), start automatic operation, the welding tool reaches the center of the guide rail, the pneumatic lifting mechanism (3-2-4) automatically lifts the welding tool, and the upper surface is in contact with the lifting stop block (3-2-5); Step 3: identify the to-be-welded point coordinate, use the large rectangular frame (2-5-3) to fully cover the overlapping area of the two wires to be welded (2-5-5) and a metal wire (2-5-1), and use the small rectangular frame (2-5-4) to cover the overlapping area of the single wire to be welded (2-5-5) and the metal wire (2-5-1) respectively; Step 4: continuous brazing, multiple prefabricated solder materials of the same size are continuously welded 2-5 times at the same welding point, the welding energy is increased by 3-12% each time, and the energy increase range is 3-12%, which ensures that the tin layer is melted into one; ​ Step 5: clamping the product to be welded, the welding tool enters the upper and lower conveying mechanism (3-3) along the upper guide rail (3-2), and the upper and lower conveying mechanism (3-3) conveys the product to be welded along the lower guide rail to the upper guide rail (3-2), thereby completing the next automatic welding.

9. The automatic brazing method of an extremely fine wire and a conductor wire according to claim 8, characterized by, The straightened metal wire (3-1-3-2) is pressed on the circular rubber pad (3-1-3-3) along the direction perpendicular to the stripe by the pressing block with equal interval stripes (3-1-3-4).

10. The automatic brazing method of an ultra-fine wire and a lead wire according to claim 8, characterized by, The straightened metal wire (3-1-2) is continuously and equally pressed by multiple force applying pressing blocks (3-1-2-1), and the pressure is transmitted to the wire to be welded (3-1-2-3) by the straightened metal wire (3-1-2).

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