32 results about "Induction brazing" patented technology

The invention relates to high-frequency induction brazing equipment and a welding method.The high-frequency induction brazing equipment comprises a wire welding machine, a cooperative heating device, an induction brazing device, a workpiece tool, a wire feeding device, a servo motor and a workbench, and the workpiece tool, the wire feeding device and the servo motor are all installed on the workbench; the wire feeding device comprises a wire feeding pipe, a wire feeding pipe fixing device and a wire feeding table, the wire feeding table is installed on the workbench, the wire feeding pipe fixing device is rotationally installed on the wire feeding table and connected with the servo motor, a welded workpiece is installed on the workpiece tool, the welded workpiece is composed of two matched sleeving structures, and the two sleeving structures are connected with the servo motor. The collaborative heating device is installed on the wire feeding device, the wire welding machine connects a welding wire into the wire feeding pipe and conveys the welding wire to the welding area or the position above the welding area or is connected with a welded workpiece, and the collaborative heating device is matched with the induction brazing device to jointly heat the welding wire section. The device is simple in structure and convenient to use, welding wires are melted efficiently, and digital and intelligent control is achieved.

The invention relates to a method for induction brazing of a first part (1) with a second part (2) at a contact line (3), wherein at least the first part (1) has a raised portion (4), which forms a chamber (5), the chamber being at the contact line, comprising the following steps: - depositing a brazing wire (6) in the chamber; - closing the chamber by assembling the second part (2) with the first part; - heating at least the brazing wire by induction so as to melt it; the contact line forming a plane (P) that virtually divides the brazing wire (6) into two portions, each portion representing 40% to 60% of the entire cross-section of the brazing wire.

The utility model discloses a flexible heavy-load induction brazing device assisted by a collaborative robot and a balancer, which relates to the technical field of brazing and comprises a six-axis collaborative robot, a spring balancer, a brazing working head, a six-axis collaborative robot arm fixing brazing working head and a spring balancer hanging brazing working head. The brazing working head is used for clamping and welding a to-be-welded copper terminal on a large-size component; and the control cabinet body is electrically connected with the six-axis collaborative robot, the spring balancer and the brazing working head. The six-axis collaborative robot and the spring balancer are used for collaboratively assisting work to form the flexible heavy-load working device, and the flexible heavy-load working device has the advantages that man-machine collaboration can be achieved with low cost, the working difficulty is greatly reduced, meanwhile, the working intensity of workers can be reduced, and the intelligent level of production and manufacturing is improved.

The present application relates to the technical field of induction heating, in particular to an electromagnetic induction brazing process and device for manufacturing a spiral-welded pipe by using a layered composite metal strip, the electromagnetic induction brazing process and device for manufacturing a spiral-welded pipe by using a layered composite metal strip is a welding method using ultra-high frequency or high frequency, medium frequency induction current as a heat source, high frequency heating is suitable for welding thin-walled pipe fittings, the medium frequency induction brazing equipment can replace the backward preheating means such as oxyacetylene heating, coal oven heating, box-type electric furnace heating and resistance heating, and can be used as a preheating equipment before brazing, the cooperation of the two can greatly improve the product quality, effectively save more than 60% of electric energy, and improve the labor conditions.

The application provides a kind of superhard abrasive forming grinding wheel ultrasonic vibration auxiliary brazing device and its operating method, the device includes motion control system, ultrasonic vibration system, high-frequency induction brazing system and forming grinding wheel fixing device, the forming grinding wheel to be brazed is fixed on the fixing device by spring chuck.The motion control system is composed of a slider placed on a moving guide rail and an electric mechanism controlling its movement, which can control the speed and direction of the slider moving up and down on the guide rail;The ultrasonic vibration system includes two ultrasonic vibration amplitude rods, piezoelectric ceramic transducers, and an external ultrasonic power supply.Each piezoelectric ceramic ultrasonic amplitude rod can provide longitudinal vibration, and two-dimensional elliptical ultrasonic vibration during brazing is achieved by combining the longitudinal vibration in two perpendicular directions;The brazing head driven by the motion control system moves up and down according to the brazing progress, and the induction coil inside the brazing head circulates cooling water.The application solves the problems of uneven distribution of brazing filler metal, low processing quality, excessive concentration of brazing temperature, and serious metallurgical reaction during the brazing process of the forming grinding tool.

The invention relates to the technical field of welding, in particular to a centrifugal machine disc body welding machining method based on full-automatic welding equipment. According to the centrifugal machine disc body welding machining method based on the full-automatic welding equipment, the centrifugal machine disc body is welded in a high-frequency induction brazing mode, heat is concentrated in the contact area of the reinforcing ribs and the disc body, the heat stress of the disc body is greatly reduced through uniform heat input, the problems of warping, deformation and the like of the disc body are effectively prevented, and the service life of the disc body is prolonged. And the forming precision and the structural stability of the disc body are improved. In the brazing filler metal melting process, the clamping force on the reinforcing ribs is increased through the clamping assemblies, the molten brazing filler metal is promoted to flow from the middle to the periphery under the capillary phenomenon effect, gaps between the reinforcing ribs and the disc body are fully filled, tight connection of the reinforcing ribs and the disc body is achieved, the probability that holes are generated in welding gaps is reduced, and the appearance quality of the disc body is improved; and the service life of the disc body is prolonged.

The invention provides a non-vacuum brazing connection method for high-temperature-resistant space truss rod pieces. The non-vacuum brazing connection method comprises the steps that space truss nodes are fixed to a tool; one end of each space truss rod piece is coated with welding flux, the space truss rod pieces coated with the welding flux are arranged in the space truss nodes in a sleeving mode, it is guaranteed that the welding flux fills the matched cavities, and the space position precision of the space truss rod pieces is guaranteed through a tool; covering the brazing connection part with a quartz isolation cover, and introducing inert protective gas; a non-contact induction brazing device is used for conducting electromagnetic induction heating on the brazing connection part; and the non-contact induction brazing device is removed, and inert protective gas is continuously introduced into the quartz isolation hood till the connector is cooled to the room temperature. By means of the method, the service environment temperature of the space truss structure ranges from 500 DEG C to 1100 DEG C, the space truss rod piece connecting strength is not lower than 95% of base metal, and the space truss rod piece connecting brazing process is not limited by the vacuum environment.

The invention relates to the technical field of welding, in particular to a medical gas copper pipe induction brazing protection effect verification method which comprises the following steps: selecting a copper pipe with a set length, and marking a plurality of marks at equal intervals along the axial direction of the copper pipe; under the condition of no ventilation, heating the copper pipe by using a heating device, measuring the heating temperature, and respectively recording the heating time T1, T2, T3 and T4 when the heating temperature of the copper pipe reaches 650 DEG C, 700 DEG C, 750 DEG C and 800 DEG C; inert gas is introduced into the copper pipe, the flow of the inert gas is controlled to be a first set value, and a heating device is used for sequentially conducting heating for T1 time at the first marking position, conducting heating for T2 time at the second marking position, conducting heating for T3 time at the third marking position and conducting heating for T4 time at the fourth marking position; the flow of the inert gas is controlled to be a second set value; the flow of the inert gas is controlled to be a third set value; and recording the mark position of which the oxidation degree meets the standard. According to the method, construction acceptance and use of medical gas copper pipe brazing can be guaranteed.

The invention discloses an alignment inductor for induction brazing. The alignment inductor comprises an inductor base, a hollow copper pipe with a square outer part and a round inner part, a ferrite magnetizer, a polytetrafluoroethylene insulating sheet and a reinforcing rib. A heating opening is formed in the middle of the square-outside and round-inside hollow copper pipe in a winding mode, and magnetic field concentration and even distribution are achieved through coil bending and spiral winding design. The ferrite magnetizers are symmetrically arranged to enhance a magnetic field; the reinforcing ribs reinforce the structure to prevent deformation; the teflon insulating sheet isolates current to avoid short circuit. By optimizing the structural design, the heating speed, the welding precision and the heat efficiency are remarkably improved, meanwhile, energy consumption and environmental pollution are reduced, and the device is suitable for precision part welding and automatic production requirements and has the technical advantages of being efficient, safe and environmentally friendly.

The invention discloses a stainless steel small-diameter thin-walled tube induction brazing structure and method, a plurality of small-diameter thin-walled tubes and a connector are connected through a novel stainless steel induction brazing welding structure and an induction brazing method, the induction brazing welding structure comprises the connector, a sleeve and a thin-walled tube three-layer structure, the sleeve is arranged between the connector and the thin-walled tube, and the sleeve is arranged between the connector and the thin-walled tube. And the fit clearance between the sleeve and the joint and the fit clearance between the sleeve and the thin-walled pipe are 0.02-0.05 mm, and effective connection between a plurality of thin-walled pipes and one joint is realized through twice induction brazing processes. The problem that a plurality of small-diameter stainless steel thin-walled pipes (the diameter is smaller than or equal to 10 mm) with the thickness ranging from 0.5 mm to 0.8 mm are difficult to weld with one stainless steel connector at the same time is effectively solved, the stainless steel thin-walled pipe connector is particularly suitable for connecting a plurality of small-diameter thin-walled pipes with the thickness ranging from 0.5 mm to 0.8 mm and the diameter is smaller than or equal to 10 mm with one connector in aerospace heat exchanger products, and the stainless steel thin-walled pipe connector is good in sealing effect, resistant to vibration, resistant to high temperature and long in service life. The fatigue performance is good in a high-temperature vibration environment, and the welding joint reliability is high.

The invention relates to a rotor end-to-end induction brazing device, which comprises an alternating current power supply device, an inductor, a cooling system, a coupling device and a clamping device, and is characterized in that the inductor converts current into a magnetic field through a chip-type induction conductor which is packaged in an insulating material and is electrically connected with the alternating current power supply device. Due to the fact that the current density is higher, the magnetic line of force is directional and controllable, the welding efficiency is improved by more than 30%, the needed power is reduced, and effective energy saving is achieved. Preferably, the welding device comprises a heat insulation seat which is provided with a through groove used for accommodating a welded rotor parallel head and an induction coil and an avoiding groove used for accommodating an adjacent rotor parallel head; and a pressing mechanism. The induction brazing device is suitable for brazing of aluminum rotor parallel heads, convenient to operate, high in welding efficiency, good in welding quality, free of splashing and small in influence on peripheral metal parts. The induction brazing of the rotor parallel heads can be finished in a high-quality manner under the condition that the rotor parallel head arrangement gap is very small.

This invention relates to the field of electromagnetic relay manufacturing technology, and discloses an ultra-high frequency induction brazing device for an electromagnetic relay contact spring system, comprising: a worktable, a fixture, a moving mechanism, and an ultra-high frequency induction brazing machine; the fixture is disposed on the worktable surface and is used to clamp and fix the contact spring system; during welding, a spring sheet is sleeved on the Kovar alloy lead-out rod in the contact spring system to form a welding point between the two; the output end of the moving mechanism can move along a first direction and a second direction, and the induction brazing head of the ultra-high frequency induction brazing machine is disposed on the moving mechanism; during operation, the moving mechanism drives the induction brazing head to move along the first direction and the second direction, so that the induction coil of the induction brazing head is aligned with each welding point. This device adopts non-contact induction heating, completely avoiding the use of carbon rod electrodes, eliminating the generation of excess carbon powder from the source, and greatly improving the internal cleanliness and long-term operational reliability of the electromagnetic relay.

The application provides a brazing coating material and a preparation method thereof. The brazing coating material comprises: a brazing material, the brazing material comprises: diamond, alloy powder; compounded heat-conducting filler; and a binder, the binder is used for mixing with the powdery brazing material and the compounded heat-conducting filler to form the brazing coating material in a fluid or paste state. The brazing coating material of the application effectively improves the heat conductivity coefficient of the brazing coating material by adding the compounded heat-conducting filler, improves the heat conduction performance of the coating, effectively reduces the drying time in the preparation stage of the induction brazing coating and the induction heating heat transfer time, and reduces the production cost of the brazing coating process.

The invention provides a high-performance hard tube assembly silver-based induction brazing device, and relates to the technical field of welding equipment.The high-performance hard tube assembly silver-based induction brazing device comprises a welding platform, a box cover is installed at the upper end of the welding platform, a limiting unit is arranged at the upper end of the welding platform and can clamp a tube, and a welding unit is arranged above the welding platform; and the pipe is heated and welded by an induction heating coil in the welding unit. By arranging the synchronous centering type limiting unit driven by the two-way air cylinder, automatic centering, clamping and positioning of the hard pipe to be welded can be achieved, the problems that in an existing brazing device, the clamping coaxiality of the hard pipe is poor, and displacement deviation is prone to occurring in the welding process are effectively solved, the centering precision of a brazing opening is greatly improved, and the welding quality is improved. Defects of pseudo soldering, leakage and the like caused by centering deviation are avoided, and the sealing performance and the structural strength of the hard tube assembly after brazing are guaranteed. And meanwhile, the flexible high-temperature-resistant clamping base plates are arranged on the inner sides of the clamping jaws, so that the outer wall of the hard pipe can be prevented from being scratched, indented and the like in the clamping process.

This utility model discloses a processing device suitable for induction brazing of electromagnetic relay housing assemblies, relating to the field of relay housing assembly processing technology. It includes: a feeding mechanism, a positioning mechanism, a pressing mechanism, and a brazing heating mechanism. The feeding mechanism is used to pick up the housing assembly to be brazed onto the heating seat of the brazing heating mechanism; the positioning mechanism is used to push the housing assembly to be brazed onto the heating seat to a target positioning point; the pressing mechanism is used to press the housing assembly to be brazed onto the target positioning point using a pressing head, so that the heating coil of the brazing heating mechanism can perform the welding operation. This utility model alleviates the technical problem of low production efficiency in the manual operation mode of resistance brazing.

This invention relates to a method for laser-aligned brazing of vibration-damping bosses on aero-engine fan rotor blades, comprising the following steps: Pre-welding preparation of the fan blade: fixing pressure-sensitive adhesive tape to the non-welding area of ​​the blade body and the boss; Brazing solder preparation: mixing Lielite hard alloy powder and brazing filler metal to form a brazing filler metal mixture powder; preparing Lielite adhesive; thoroughly mixing the prepared adhesive and brazing filler metal mixture powder to form a paste; Pre-laser alignment brazing preparation: applying the paste brazing filler metal to the boss; placing the coated blade in an environmental chamber, then evacuating the chamber and filling it with argon gas to maintain atmospheric pressure; Laser alignment brazing: using a rectangular flat-top laser, with the spot size determined by the wear-resistant boss on the blade; Post-brazing inspection: using fluorescence and X-ray inspection to check the welding quality. This invention solves the problem of uneven wear-resistant layer caused by induction brazing methods. This invention can ensure uniform distribution of hard alloy on the surface of the wear-resistant layer.

The roll bending brazing copper ring machining technology for the high-power wind driven generator comprises the following steps that S1, machining is conducted, specifically, the two ends of a copper bar are both machined, half-thickness connectors are obtained, each half-thickness connector sequentially comprises a first inclined section, a horizontal section and a second inclined section from outside to inside, and the two half-thickness connectors are spliced to form a lap joint section; s2, preliminary roll bending; and S3, induction brazing is conducted, specifically, a silver-copper-nickel soldering lug is placed on the horizontal section, and silver-copper-zinc soldering lugs are placed on the first inclined section and the second inclined section. The prepared copper ring has strength, hardness and toughness, has heat resistance and corrosion resistance, and can be safely used as a high-power wind driven generator.

The application discloses a kind of metal round tube automatic brazing device, base is connected with main workstation, fixture support and brazing support;Self-centering clamp A is connected on fixture support, round tube a is detachably connected on self-centering clamp A;Self-centering clamp B is connected on first feeding mechanism, and round tube b is detachably connected on self-centering clamp B, and first feeding mechanism is connected on main workstation;Round tube b is close to the workstation on the both sides of one end of round tube a respectively connected with second feeding mechanism and third feeding mechanism, and turning mechanism is connected on second feeding mechanism;Brazing material brushing mechanism is connected on third feeding mechanism;Induction brazing equipment is connected on brazing support, and the arc brazing head of induction brazing equipment is concentric with round tube a and round tube b.Compared with prior art, the application can automatically groove processing, butt joint, brazing and other processing to round tube, improve brazing quality and brazing efficiency.

Title: Method of assembly by brazing and product resulting from the method The invention relates to a method of induction brazing of a first part (1) with a second part (2) at a contact line (3) at least the first part (1) has a relief (4), which forms a chamber (5), said chamber being at the contact line, comprising the following steps: - Deposition of a brazing wire (6) in said chamber, - Closing of the chamber by assembly of the second part (2) with the first part; - Heating of at least the brazing wire by induction so as to melt it; said contact line forms a plane (P) which virtually cuts the brazing wire (6) into two parts, each part representing between 40% and 60% of the entire cross-section of the brazing wire. Figure for abstract: Fig. 1

The utility model relates to the technical field of tools, in particular to a small-pipe-diameter thin-walled pipe induction brazing heat dissipation protection tool which comprises a tool body, the upper portion of the tool body is provided with heat dissipation holes used for leading out heat, and the lower portion of the tool body is provided with a protection head used for being inserted into a thin-walled pipe to be welded. The outer wall face of the protection head abuts against the inner wall of a thin-walled pipe to be welded, a positioning part used for containing a pipe joint is arranged between the outer side wall of the protection head and the tool body, and the problems that in the induction brazing process of the small-pipe-diameter thin-walled pipe fitting, heat is concentrated, the oxidation color exceeds the standard, and spot corrosion is caused are solved. And the overall welding quality and efficiency are improved.

The utility model provides a vacuum induction welding furnace, which relates to the field of semiconductor device processing equipment and comprises a product moving device, a vacuum cavity, an inductor, a temperature measuring head and a temperature measuring head moving device. The product moving device comprises a product clamp used for bearing products. The product clamp can enter and leave the vacuum cavity; the inductor is fixed in the vacuum cavity; the product clamp can move to the opposite side of the inductor; the temperature measuring head and the temperature measuring head moving device are fixed in the vacuum cavity; the temperature measuring head is fixed on the temperature measuring head moving device; the temperature measuring head moving device can drive the temperature measuring head to move. The vacuum induction welding furnace provided by the utility model solves the problem that in the prior art, the temperature of an induction brazed product is difficult to obtain, so that the temperature of the product is difficult to control by controlling induction power, and the accurate temperature of the semiconductor product subjected to induction welding can be obtained.

Hermetic thermocouple harnesses for solid oxide electrochemical systems include a harness having a feedthrough washer including two metal disks with holes circumferentially disposed about the disks and a braze alloy layer between the disks. Thermocouples are fed through the feedthrough washer, and induction brazing is used to seal and bind the disks and the thermocouples together. The feedthrough washer is welded to the base of the hotbox, forming a hermetic seal while allowing the thermocouples to extend between the interior and exterior of the hotbox. A second harness includes a main body, a top tube, and a sealant end having holes. Thermocouples extend from the interior of the hotbox, through the top tube, main body, and through the holes of the sealant to the exterior of the hotbox. Clearance between the thermocouples and their respective holes are closed with glass seals, and the top tube is filled with putty.

The invention relates to a stator end-to-end induction brazing device, which comprises an alternating current power supply device, an inductor, a cooling system, a coupling device and a clamping device, and is characterized in that the inductor converts current into a magnetic field through a chip-type induction conductor which is packaged in an insulating material and is electrically connected with the alternating current power supply device. And as the current density is higher, the orientation of magnetic lines is controllable, and the welding efficiency is improved by more than 30%. Preferably, the clamping device comprises a moving arm arranged on the lower portion of the support and a connecting arm with a rotating shaft, a gear and a clamping jaw arranged on the lower portion, the driving mechanism drives the moving arm to move up and down, the clamping jaw on the rotating shaft is driven to rotate through meshing of a rack and the gear, and clamping and loosening of the stator parallel head arranged between the top plate of the support and the clamping jaw are achieved. The induction brazing device is suitable for brazing of aluminum stator parallel heads, convenient to operate, high in welding efficiency, good in welding quality, free of splashing and small in influence on peripheral metal parts.

The utility model provides a kind of water-cooled tooling of double induction brazing, including hollow columnar tooling body, its upper portion detachably installs tooling head, lower portion is connected support base through fixed base, is equipped with nitrogen circulation channel, nitrogen gas is circulated to workpiece by gas inlet nitrogen main channel, gas outlet passage to prevent oxidation, chamfer is equipped at junction to reduce resistance, cooling water circulation system is also equipped, circulation cooling is formed by water inlet, annular cooling water space, water outlet, tooling head modularization is replaceable, different workpieces are adapted, water inlet, water outlet passage drilling formation is sealed with plug. The tooling is efficient, well protected, widely used and reliable, and suitable for double induction brazing.

The invention discloses a fireless automatic brazing method for a heat exchanger and the heat exchanger, and relates to the technical field of heat exchanger manufacturing. The fireless automatic brazing method for the heat exchanger comprises the following steps that a plurality of to-be-welded semicircular pipes located at the same end of the heat exchanger are divided into a plurality of to-be-welded pipe sets, the to-be-welded parts of the semicircular pipes in the same to-be-welded pipe group have the same welding parameter requirement; induction heaters matched with the to-be-welded pipe sets in number and shape are provided, each induction heater is provided with a profiling area, and the profiling areas of the induction heaters are arranged on the periphery of the same to-be-welded pipe set in a one-to-one surrounding mode; and the induction heater is powered on, so that induction brazing is conducted on the to-be-welded portions of all the semicircular pipes in the corresponding to-be-welded pipe set. According to the technical scheme, the one-time brazing qualification rate of the special-shaped heat exchanger can be increased, the later repair welding rate is reduced, the production efficiency is improved, and the production cost is reduced.

This invention relates to the field of surface strengthening technology, specifically to a diamond composite brazing coating and its preparation method. The invention first mixes a brazing powder containing a first brazing filler metal powder, diamond abrasive, and flux with an organic binder to form a flexible strip-shaped brazing filler metal. Then, after a first pre-firing process, a porous, pore-fillable skeleton structure is formed. This skeleton structure is then embedded in a filler powder containing a second brazing filler metal powder and a powder binder, and ultrasonic vibration is used to fill the pores. After a second pre-firing process, it is placed on a substrate surface for induction brazing. This method can actively compensate for and repair pore defects caused by the volatilization of the organic binder before brazing, reducing pore residue in the coating after welding, improving the coating's density, surface smoothness, and abrasive bonding stability, and significantly improving the coating's surface quality.

The invention relates to the field of brazing machines, in particular to a PDC induction brazing machine and a brazing method thereof, the PDC induction brazing machine is used for welding a brazing piece and a PDC clad sheet, the PDC induction brazing machine comprises a base, a moving device, a first heating device and a second heating device, the moving device, the first heating device and the second heating device are installed on the base, and the first heating device and the second heating device are both arranged above the moving device; the first heating device comprises a first lifting mechanism and a first coil, and the first lifting mechanism is connected with the first coil so as to drive the first coil to move; the second heating device comprises a second lifting mechanism and a second coil, and the second lifting mechanism is connected with the second coil so as to drive the second coil to move; a preset cavity used for containing a brazing piece is formed between the first coil and the second coil. The moving device comprises a driving mechanism and a fixing mechanism, the fixing mechanism is used for fixing a brazing piece, and the driving mechanism is connected with the fixing mechanism and drives the fixing mechanism to move so that the brazing piece can move in a preset cavity between the first coil and the second coil. The device is simple in structure, high in production efficiency and low in production cost.

The present application belongs to the technical field of contact assembly welding, and particularly relates to a welding device and a welding method for a multi-component contact assembly. The welding device comprises a welding support tool, a welding pressure head tool and an induction brazing device. The welding support tool comprises a base, and the base is fixed with a support ceramic rod, a first limiting ceramic rod and an arc leading piece support rod. The welding pressure head tool comprises an upper support frame, and the lower end of the upper support frame is fixed with a first upper pressure rod and a second upper pressure rod. The induction brazing device comprises an induction coil, and the induction coil is arranged around the welding part of the multi-component contact assembly. The welding device with a special structure can simultaneously realize the welding of multiple components, solve the influence of the welding of the last welding point on the strength of the previous welding point during step-by-step welding, improve the welding quality and the welding efficiency, and realize large-scale stable production by using the welding process of the present application. The welding process is easy to operate, low in cost, high in welding efficiency and good in welding quality consistency.

The present application provides a welding intelligent control method for multi-strand pure aluminum flat wire induction brazing, which respectively carries out infrared and visible light shooting on the brazing area of the multi-strand pure aluminum flat wire for completing the current brazing operation, analyzes the obtained brazing area infrared image and visible light image, generates the temperature state atlas and crack state atlas of the brazing area, thereby uniformly and accurately calibrating the brazing filler metal temperature distribution and surface crack distribution of the brazing area; the temperature state atlas and the crack state atlas are correlated to determine the relationship between the brazing filler metal temperature and the surface crack in the brazing area, to judge whether the brazing needs to be continuously carried out to eliminate the original crack, and meanwhile, the operation position for continuously carrying out the brazing is calibrated, so as to accurately fill the brazing filler metal to the crack in the subsequent process and effectively save the brazing filler metal consumption, and the brazing quality of the multi-strand pure aluminum flat wire is improved.