71 results about "Induction brazing" patented technology

The invention provides an ultrasonic vibration auxiliary brazing device for a superhard abrasive formed grinding wheel and an operation method of the ultrasonic vibration auxiliary brazing device, the device comprises a motion control system, an ultrasonic vibration system, a high-frequency induction brazing system and a formed grinding wheel fixing device, and the formed grinding wheel to be brazed is fixed on the fixing device through a spring chuck. The motion control system is composed of a sliding block arranged on the movable guide rail and a motor controlling the sliding block to move and can control the vertical moving speed and direction of the sliding block on the guide rail. The ultrasonic vibration system comprises two ultrasonic vibration amplitude-change poles, a piezoelectric ceramic transducer and an external ultrasonic power supply, each piezoelectric ceramic ultrasonic amplitude-change pole can provide longitudinal vibration, and two-dimensional oval ultrasonic vibration in the brazing process is achieved through synthesis of the longitudinal vibration in the two vertical directions; the motion control system drives the brazing head to move up and down according to the brazing progress, and cooling water circulates in an induction coil of the brazing head. The problems that in the brazing process of the formed grinding tool, brazing filler metal distribution is not uniform, the machining quality is low, the brazing temperature is too concentrated, and the metallurgical reaction is serious in the process are solved.

The present invention provides a negative electrode column and a preparation method thereof, and a secondary battery, belonging to the field of battery technology. The preparation method of the negative electrode column of the present invention comprises the following steps: coating a solder flux on the surface of a soldering sheet to obtain a preformed soldering sheet, assembling the preformed soldering sheet between a copper plate and an aluminum column, and performing high-frequency induction brazing on the copper plate and the aluminum column to form a negative electrode column. The present invention improves the yield rate and solder joint strength of the negative electrode column by controlling the composition and coating amount of the solder flux.

A high-frequency induction melt-brazing method suitable for an anode aluminum guide rod and a steel claw comprises the steps that to-be-welded surfaces of the anode aluminum guide rod and the steel claw are pretreated, and then high-frequency electromagnetic induction heating coils are arranged around the steel claw; a layer of brazing filler metal is laid on the to-be-welded surface of the steel claw, the steel claw is heated to the first preset temperature through induction current generated by a high-frequency electromagnetic induction heating coil, the heating time is controlled to the first preset time, the brazing filler metal is molten and diffused to the to-be-welded surface of the steel claw, and a steel claw welding precursor is obtained; the anode aluminum guide rod is placed on the welding surface of the steel claw welding precursor, a layer of brazing filler metal is laid between the welding surface of the steel claw welding precursor and the anode aluminum guide rod, the induction current generated by the high-frequency electromagnetic induction heating coil is utilized again to heat the steel claw to the second preset temperature, the heating time is controlled to the second preset time, and the steel claw welding precursor is obtained. And high-frequency induction melt-brazing of the anode aluminum guide rod and the steel claw is realized.

The invention relates to robot automatic induction brazing equipment and method based on visual guidance, an induction brazing welding gun is fixedly connected to a robot, and the induction brazing welding gun and a 3D camera face a welding point area of a circular tube object; a conversion relation T (R, t) between a camera coordinate system and a robot coordinate system is obtained through a hand-eye calibration method, and the camera coordinate system is unified to the robot coordinate system; the camera photographs a welding point area of the circular tube object and collects an image of the welding point area; precisely positioning a welding point of the circular tube object by utilizing a visual algorithm to obtain a pose P (x, y, z, Rx, Ry and Rz) of the welding point in the camera; and according to the coordinate system conversion relation T (R, t) determined through hand-eye calibration, the welding point pose P (x, y, z, Rx, Ry and Rz) is converted from a camera coordinate system to a robot coordinate system, and a robot drives an induction brazing welding gun to conduct welding. The object is accurately positioned through photographing of the 3D camera, and the robot is guided to achieve high-precision automatic induction brazing according to the posture of the object.

The invention discloses a high-voltage insulated electrode vacuum high-frequency electromagnetic induction brazing device and method, and belongs to the technical field of equipment manufacturing. Comprising a vacuum chamber and a high-frequency induction brazing power supply which are fixedly mounted on an equipment mounting platform, a touch screen for monitoring and controlling which is fixedly mounted on one side of the equipment mounting platform, and a vacuum pump which is fixedly mounted at the bottom of the equipment mounting platform, a high-frequency induction heating coil is installed at the output end of the high-frequency induction brazing power source located on one side of the vacuum chamber, the high-frequency induction heating coil is fixedly installed in the center of the vacuum chamber, and the touch screen for monitoring and controlling collects the vacuum degree in the vacuum chamber through a vacuum degree detection inductor. And an extraction opening of the vacuum pump is communicated with the vacuum chamber through a connecting pipe. Rapid heating is achieved through high-frequency electromagnetic induction and the vacuum chamber, and the influence of oxidation generated in the heating process on the compactness and uniformity of a welding part is avoided as much as possible.

The utility model discloses an induction brazing device for welding a wear-resistant layer on a detachable outer roller sleeve. The induction brazing device comprises an induction brazing tool, the induction brazing tool comprises an upper die, a lower die, a lifting mechanism and an induction brazing heating mechanism. A lower groove is formed in the lower die, the detachable and replaceable outer roller sleeve is tightly plugged in the lower groove through a plug plate, a wear-resistant structure is placed on the upper surface of the detachable and replaceable outer roller sleeve, and the space between the wear-resistant structure and the detachable and replaceable outer roller sleeve is filled with welding flux; the telescopic end of the lifting mechanism is connected with the upper die, the upper die is connected with a pressing plate, the lower surface of the upper die is connected with a heating wire in the induction brazing heating mechanism, and when the pressing plate of the upper die is pressed on the abrasion-resistant structure in the lower die, a gap is formed between the heating wire and the abrasion-resistant structure. The abrasion-resistant structure can be welded to the outer surface of the detachable outer roller sleeve in an induction brazing mode, the welding time is short, meanwhile, the stress influence is reduced, damage to the detachable outer roller sleeve is reduced, and the service life of the detachable outer roller sleeve is prolonged.

The invention relates to the field of auxiliary devices for brazing, in particular to an induction brazing auxiliary device for a high-voltage switch product. The induction brazing auxiliary device for the high-voltage switch product comprises a base, a guide seat is arranged on the base, a connector clamping assembly is movably installed on the guide seat in a guiding mode, the connector clamping assembly comprises a connector clamp capable of being used for clamping a connector, a clamp seat is further arranged on the base, and a pipe clamping assembly capable of being used for clamping a pipe is arranged on the clamp seat. When the connector clamping assembly clamps a connector and the pipe clamping assembly clamps a pipe, the connector clamped by the connector clamping assembly is coaxial with the pipe clamped by the pipe clamping assembly, an elastic retaining structure is arranged between the connector clamping assembly and the guide seat, and the elastic retaining structure provides elastic acting force for the connector clamping assembly to move towards the pipe clamping assembly. And the joint clamping assembly is provided with a stop structure for preventing the joint clamping assembly from being separated from the guide seat in the guide moving direction. The device is low in production and use cost and convenient to popularize and use.

The invention discloses a manufacturing process of a precise diamond roller, which belongs to the technical field of diamond rollers and comprises the procedures of mold design and processing, internal electroplating, pretreatment, braze coating material preparation, CVD (chemical vapor deposition) strip inlaying, braze coating material coating, assembling and fixing of a female mold cavity and a roller base body, vacuum drying, gas shield induction braze welding, precise finishing, detection and packaging and the like. According to the method, the diamonds sequentially fall into the female die cavity through the hole template, then one ends of the diamond particles are preliminarily fixed into the female die cavity through the internal electroplating method, and finally the other ends of the diamond particles are embedded into the braze coating material through braze welding, so that ordered arrangement and high consistency of the diamond abrasives are achieved, and the quality of the diamond abrasives is improved. And the durability and the precision of the roller are improved.

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 invention discloses a method and system for obtaining copper pipe welding parameters, and the method comprises the steps: obtaining a first length verification copper pipe with the same specification as a copper pipe required by actual welding, and dividing the verification copper pipe into a plurality of verification areas from the first to the Nth; executing a first verification step on the first area when the verification copper pipe is in a non-ventilation state; sequentially introducing protective gas into the verification copper pipe according to a preset flow gradient, and sequentially executing a second verification step on the S adjacent verification areas under different flows; oxidation information in the verification copper pipe is obtained, and a welding parameter comparison table of the current verification copper pipe is generated based on the oxidation information; and on the basis of the welding parameter comparison table, welding parameters of the current welded copper pipe are obtained. The method can effectively verify the internal protection effect of the copper pipe during copper pipe brazing under the conditions of various heating temperatures, heating time and gas flow, and is beneficial to certification and use of copper pipe induction brazing process evaluation.

The invention discloses a snow shoveling plate preparation process in the technical field of snow shoveling plate preparation, which comprises the following steps: preparing hard alloy snow shoveling teeth by adopting ultra-coarse particle tungsten carbide and EFS-T cobalt powder, processing a welding groove in an NM400 steel plate, performing sand blasting, treating a hard alloy welding surface, paving Ag-Cu-Ti three-layer gradient brazing filler metal, performing high-frequency induction brazing, and performing post-welding heat treatment to eliminate stress. And finally, straightening and detecting. The snow shoveling plate manufactured through the technology is good in wear resistance, high in welding interface shear strength and excellent in impact toughness at the temperature of-40 DEG C, the hard alloy snow shoveling teeth are modularly designed and can be detached and replaced, and the problems that an existing snow shoveling plate is insufficient in wear resistance, prone to falling off during welding, high in maintenance cost and the like are solved.

The invention provides an induction brazing heating coil device which comprises a coil part and a first connecting part, one end of the coil part is connected with one end of the first connecting part, an included angle is formed between the coil part and the first connecting part, and the coil part and the first connecting part intersect to form an L shape. According to the induction brazing heating coil device, the L-shaped coil structure is adopted, so that the situation that an existing linear induction coil interferes with compressor feet near connection operation during opening and closing during connection operation between a liquid storage device air inlet connecting pipe and a compressor shell can be effectively avoided, and when the coil is opened and closed, a first connecting part of the L-shaped coil structure is connected with a second connecting part of the L-shaped coil structure; the bottom feet can penetrate through the positions above the bottom feet, so that interference is avoided, and the working efficiency can be effectively improved through the technical scheme.

The utility model discloses a multi-hole-site efficient induction brazing tool for a copper pipe flange. The multi-hole-site efficient induction brazing tool comprises a base, a pair of rotary lifting assemblies arranged on the two sides of the base, clamping jaw assemblies arranged at the upper ends of the rotary lifting assemblies and a flange supporting platform arranged in the middle of the base. The clamping jaw assembly comprises a clamping jaw base fixed to the rotary lifting assembly and a plurality of clamping jaws fixed to the clamping jaw base. The device can be suitable for welding products of various similar structures, the flange supporting platform and the copper pipe clamping assembly both support rapid replacement, the used clamping jaw can guarantee accurate positioning of the copper pipes, one-time clamping and repeated welding of the multiple copper pipes and a base body flange can be achieved in cooperation with an opening and closing type heating coil carried by a mechanical arm, and the welding efficiency is improved. And the time for repeatedly clamping the copper pipe and the time for adjusting the posture of the copper pipe are saved.

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 present invention discloses an induction brazing device and welding method suitable for thin-walled aluminum dense microchannels, belonging to the field of welding technology. It includes upper and lower annular induction coils and an induction coil position adjustment mechanism. The lower annular induction coil is fixedly connected to the induction coil position adjustment mechanism. During welding, the upper annular induction coil is located directly above the lower annular induction coil. The induction coil position adjustment mechanism can adjust the displacement of the lower annular induction coil in the vertical direction. The middle of the lower annular induction coil is a horizontal section, and both ends are tilted downward. The cross-sectional shapes of the upper annular induction coil and the lower annular induction coil correspond to the cross-sectional shapes of the pre-welded manifolds, and gaps are left between the pre-welded manifolds. The present invention is suitable for the welding of thin-walled aluminum dense microchannels, ensures the quality of the weld, improves the welding efficiency, and has the advantages of complete brazing seam filling and bright brazing seam on both sides.

The present invention discloses an induction brazing device and a welding method for multi-degree-of-freedom of irregular-shaped components. The induction brazing device includes a working platform, a robotic arm, an induction brazing coil, a three-degree-of-freedom working platform, etc. The two ends of the induction brazing coil are respectively connected to the ends of the two induction brazing coil robotic arms. Through the movement of the robotic arms, a current closed loop is formed at any position; the induction brazing coil is composed of multi-degree-of-freedom joints controlled by a pneumatic circuit, which can realize the brazing of workpieces of different shapes; the three-degree-of-freedom working platform controls the movement of the workpiece to realize the array-type induction brazing requirements of different positions of the workpiece; the three-degree-of-freedom working platform and the robotic arm realize intelligent coordinated movement through an adaptive linkage controller, which not only realizes the convenient clamping and disassembly of the workpiece, but also is applicable to the brazing of a large number of workpieces; the temperature monitoring device robotic arm can control the temperature monitoring device to monitor the surface temperature distribution of the workpiece in real time from multiple directions and angles.

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 utility model relates to intelligent brazing equipment for an aluminum heat exchanger, which comprises a rack, a three-dimensional transmission device, an induction brazing welding machine, a product positioning tool and a cooling device, and is characterized in that the intelligent brazing equipment is also provided with a dust removal device, the three-dimensional transmission device and the product positioning tool are both mounted on the rack, the induction brazing welding machine is mounted on the three-dimensional transmission device, and the product positioning tool is mounted on the cooling device. A welded aluminum heat exchanger is installed on the product positioning tool, and the three-dimensional conveying device, the induction brazing welding machine, the product positioning tool, the cooling device and the dust removal device are all connected with the control system. The method has the following advantages and effects that the welding efficiency is improved, carbon emission is reduced, the method is more friendly to operators, the welding process is more stable and controllable, the welding environment is safer, and alignment of the aluminum heat exchanger and the product connecting pipe is more accurate and convenient to adjust.

The present invention relates to a high-frequency induction brazing welding device, including a bracket fixture, an induction coil and a contact lifting device. The bracket fixture clamps the bracket and exposes the welding position of the bracket to the outside of the bracket fixture. The contact lifting device is located above the bracket welding position and lifts the contact located at the bracket welding position. The induction coil is located below the bracket welding position. The contact lifting device first lifts the contact to a certain height. After the induction coil heats the brazing material located at the bracket welding position to a completely molten state, the contact lifting device lowers the contact to the welding height and discharges the bubbles. By adopting the above scheme, the present invention provides a high-frequency induction brazing welding device with improved welding quality, which mainly solves the defect problem that the existing contact welding surface is concave, resulting in poor welding area of ​​the contact assembly.

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 utility model discloses induction brazing, quenching and annealing integrated equipment for a blade, which belongs to the technical field of brazing and comprises a box body I. An automatic feeding component for feeding is mounted on the box body I; the automatic feeding assembly comprises an automatic feeding device and a positioning device, the first box body is connected with the automatic feeding device, and the automatic feeding device is connected with the positioning device; the automatic feeding device is connected with a discharging assembly used for conveying and discharging materials. A welding assembly for automatically welding materials is mounted on the automatic feeding device; a quenching assembly used for cooling is installed on the automatic feeding device, and the discharging assembly is connected with the quenching assembly. An annealing assembly used for annealing is installed on the automatic feeding device. According to the mode, the welding continuity of the device is improved through automatic feeding of the blades, the working efficiency of blade welding is improved, and meanwhile, through positioning of the blades, welding failure caused by deviation of the placement positions of the blades is avoided.

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 provides brazing filler metal, a welding structure, a preparation method of the welding structure, a compressor, a pipeline of the compressor and an air conditioner, relates to the technical field of compressors, and aims to solve the problems of low welding efficiency and low welding seam strength in related technologies. The brazing filler metal is applied to induction brazing of a compressor pipeline and comprises, by mass, 80-90 parts of copper, 5-10 parts of phosphorus, 1-5 parts of manganese and 0.5-5 parts of iron. According to the brazing filler metal provided by the invention, Fe and Mn synergistically improve the resistivity, iron can refine grains, and hysteresis loss during high-frequency heating is reduced. Under the same experiment condition, the Mn + Fe combination enables the resistivity improvement effect to be about 30% higher than that of single addition.

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.

A high-frequency brazing process method for angular pipe end threaded joints belongs to the field of aero-engine technology. The high-frequency brazing process method for angular pipe end threaded joints includes: pre-assembly of the angular pipe end threaded joint and the high-frequency brazing tooling, installing the angular pipe end threaded joint on the top of the adjustment block, installing a protective cover on the top of the adjustment seat, adjusting the position of the adjustment block so that the side wall of the angular pipe end threaded joint fits with the protective cover; adjusting the height of the adjustment seat so that the area to be welded of the angular pipe end threaded joint is located on the upper part of the protective cover; installing a protective block on the top of the adjustment seat, and fitting the protective block and the protective cover to form a circular structure; inserting a catheter into the top hole of the angular pipe end threaded joint for high-frequency induction brazing. The high-frequency brazing process method for angular pipe end threaded joints can achieve high-frequency brazing of angular pipe end threaded joints, thereby improving the quality and processing efficiency of aero-engine pipeline products.