121results about How to "Improve brazing quality" patented technology

The stacked plate oil cooler has a first plate and a second plate. Both the first plate and the second plate are made of a three-layered aluminum alloy clad sheet. The second plate is folded at an outer rim to place the brazing material layer on both sides of the second plate. The first and second plates and are stacked alternately and brazed to define a water passage between sacrificial layers and, and to define an oil passage between brazing material layers. The first plate is folded at an outer rim to place the sacrificial layer on a lateral outside of a core assembly to decrease exposure of the brazing material layer to the lateral outside.

Disclosed is a flux-containing brazing material, which is used to braze the same or different kinds of metal members with each other at low temperatures. The flux-containing brazing material includes a mixed powder, comprised of Zn alloy powder, containing 10 to 40 wt % of Al or Al and Si, and remaining Zn, and 10 to 40 wt % of cesium fluoride-based flux powder on a basis of the Zn alloy powder. The mixed powder is subjected to powder forging and extruding processes to form a three-dimensional flux. The flux-containing brazing material is advantageous in that the Zn alloy and flux powders are mixed with each other and machined to form the three-dimensional flux, thereby simplifying a brazing process because a flux coating process is omitted during the brazing process. The brazing quality is improved because the flux content in the brazing material is properly controlled.

The invention relates to a soldering method of a conducting ring of a motor rotor. In the method, an end ring is heated through improving the structure of a conducting bar of a rotor and adopting a medium frequency induction way, and a super thick conducting ring of a high capacity motor rotor is soldered by the way that two brazing torches respectively assist heating the end head of the conducting bar and the excircle surface of the end ring. The soldering method of the conducting ring of the motor rotor has the advantages of good soldering quality and motor performance and quality improvement when being used for soldering the conducting ring of the high capacity motor rotor.

In a brazed structure, a first member has a first portion defined by one of a recessed portion and a hole, and a second member has a second portion brazed to the first portion with a copper brazing material. The first member has a coefficient of thermal expansion that is smaller than that of the second member.

A method of making a golf club head, which the golf club includes a plurality of components, includes the steps of: coating a brazing solder on the components, then heating the components for solidification of the brazing solder to form a metal skin layer on each component, then bonding the components together by brazing.

The invention provides a self-bonding composite board and a manufacturing process thereof and belongs to the technical field of soldering. The manufacturing process comprises the steps of A, manufacturing board bodies and board cores, wherein an aluminum board is cut into blocks so that the board bodies for composition can be obtained, honeycomb cores are manufactured with aluminum foil and cut into a size corresponding to that of the board bodies for composition so that the board cores can be obtained, and the board bodies for composition and the board cores can be machined with corresponding dies manufactured according to different specification requirements; B, conducting assembly, wherein the upper surface and lower surface of each board core are smeared with soldering flux and covered with the corresponding board bodies for composition to obtain a blocky composite cellular board, and the composite cellular boards are clamped to be shaped with a clamp; C, conducting soldering, wherein the composite cellular boards are dried and fed into a soldering furnace to be soldered so that the self-bonding composite board can be obtained. According to the self-bonding composite board and the manufacturing process thereof, deformation of the composite board during high-temperature soldering can be prevented, so that soldering quality is improved, production cost is reduced and the high-quality self-bonding composite board is obtained.

The invention provides induction brazing equipment which comprises a rotating mechanism, a positioning tool and an induction heating coil. The positioning tool is disposed on the rotating mechanism and concentrically rotates along with the rotating mechanism. The induction heating coil sleeves the outer side of the axis of the positioning tool. A mounting space is formed between the induction heating coil and the positioning tool. The induction brazing equipment has the advantages that a to-be-welded part is heated evenly through the induction heating coil, the problems of traditional flame brazing are solved, uneven heating caused by position deviation of tradition induction brazing is avoided, and brazing quality of workpieces is increased.

An RE-silver solder based on a silver solder series including Ag-Cu-Zn, Ag-Cu-Zn-Sn, Ag-Cu-Zn-Cd, and Ag-Cu-P is prepared through adding RE mixture whose main components are Ce and La, mixing, smelting, casting, sawing, acid washing, squeezing and drawing. Its advantages are high purity and plasticity, and good spreading nature on metal surface.

A brazing system carrying out heating/cooling by using gas as a medium comprises a furnace body, a vacuum pumping system and a gas supply system, wherein a workpiece is arranged in a furnace chamber of the furnace body, a gas inlet and a gas outlet are arranged on the furnace body, and the outer part of the furnace body is provided with a circulating pipeline which is connected between the gas inlet and the gas outlet of the furnace body; a heating part and/or a cooling part are/is arranged on the circulating pipeline, and the heating part and/or the cooling part guides hot gas or cold gas into an inner cavity of the workpiece via the circulating pipeline through a power device so as to carry out circulating heating or cooling on the workpiece; a vacuum opening and a protective gas input opening are further arranged on the furnace body; the vacuum pumping system is connected with the vacuum opening and used for enabling the workpiece to be in an oxygen-free environment; and the gas supply system comprises a protective gas storage tank, and is connected with the protective gas input opening and used for conveying protective gas for the furnace body. The brazing system has the advantages of high efficiency, light weight, high safety, uniform workpiece heating or cooling, wide application range and the like.

The invention provides a non-oxidation brazing and thermal treatment device of hard alloy cutting teeth, belongs to the technical field of cutting tools, and mainly solves the problems of the prior art of poor welding quality and thermal treatment effect. The non-oxidation brazing and thermal treatment device comprises a cryogenic box, a nitrogen transporting pipeline, a heating furnace, a quenching tank and a manipulator. The non-oxidation brazing and thermal treatment device is characterized in that the nitrogen transporting pipeline is arranged between the cryogenic box and a working bin, one part of the nitrogen transporting pipeline in the working bin is close to the top wall of the working bin, and oxidation discharge holes formed on the nitrogen transporting pipeline. The heating furnace, the quenching tank and the manipulator are located in the working bin of a sealed structure. A heating operation hole, a heating observation hole, a quenching operation hole and a quenching observation hole are formed at the top of the working bin. A waste gas discharge hole is formed on the lower portion of the working bin or on the side wall close to the bottom. A material inlet is formed on the side wall of one side of the working bin close to the heating furnace, a material outlet is arranged on the side wall of one side of the working bin close to the quenching tank, and a movable sealed device is arranged in the material outlet. The non-oxidation brazing and thermal treatment device reduces energy consumption and saves materials.

The invention provides a NB continuous brazing core body heating method for an automobile radiator brazing process. The heating method comprises the following steps of establishing a core heating model, calculating boundary heat flow of the core surface by the model; solving a total heat absorption rate by adopting a test method, obtaining the total heat absorption rate of each position inside a hearth according to a position corresponding to a central position of a core body in the furnace, and realizing a mathematical model control for a heating furnace. According to the method, states of products in the furnace is controlled in real time through the model, the brazing quality is improved, according to the heat transfer principle, a three-dimensional transient thermal analysis model is constructed, a simulation and test combination method is adopted, the product states in the furnace is monitored, a core heating model is established, a simulated thermal cycle curve is basically matched with a measured thermal cycle curve, so that the correctness of the finite element model is proved, parameters of the brazing process are preliminarily determined through the simulation method, initial parameters of the model are changed by utilizing the model, and an optimal brazing heating system is found out.

The invention relates to an adhesive system for brazing flux, a coating composition for brazing filler metal and a flux coated brazing rod, and belongs to the field of flux coated brazing rods. The adhesive system for the brazing flux comprises a main agent and a curing agent; the main agent is composed of, by weight, 18-23 parts of epoxy resin, 15-20 parts of polysulfide rubber, 7-14 parts of dibutyl phthalate and 3-8 parts of diluent; the curing agent is composed of, by weight, 70%-80% of diethylenetriamine and 20%-30% of phthalic anhydride. The adhesive system for the brazing flux is composed of epoxy resin and polysulfide rubber and can be used on the brazing filler metal surface for preparing dampproof and anti-drop coating after adding and mixing brazing flux evenly. The coating can be adhered to the inner core of brazing filler metal well and good in dampproof and anti-drop effect; the flux coated brazing rod cured and prepared by the coating composition is low in organic content, capable of decomposing under the brazing temperature, less in residues and small in influence on brazing.

The invention discloses a system and a method applied to automatic brazing of stellite alloy long blades, relates to a system and a method applied to automatic brazing of stellite alloy long blades and aims to solve the defects that manual high-frequency brazing manner is used for operating in the prior art, the brazing operation is limited by the skills of the welders, the brazing qualification rate is low and each blade is low in consistency of brazing quality. The system applied to automatic brazing of the stellite alloy long blades comprises an IGBT high-frequency induction heating power supply device (1), a PLC control system (2), an infrared thermometer (3), an inductor with blade profile, a rigid inductor bracket (5), a four-axis transformer lifting and rotating platform (6), a blade anti-deformation supporting tool (7) and brazing operation platform tool (8). The system and the method are applied to the field of automatic brazing of the stellite alloy long blades.

The invention relates to a method for avoiding the flexure deformation of a radial diffuser center plate of an aeroengine, which comprises the steps: firstly, No.20 steel plates which are originally used in the diffuser center plate are replaced by 1Cr13 plates; meanwhile, brazing quality is improved, and brazing is carried out by high-temperature copper brazing with a brazing temperature of 1050 DEG C; after the brazing is finished, an X-ray is used to test brazing joints so as to ensure that brazing filler metal evenly and fully flows into the brazing joints; after the copper brazing is finished, radial diffuser parts are protected on a tray, and are heated to 930 to 950 DEG C so as to be subjected to oil quenching; and after the oil quenching process is finished, the radial diffuser parts are processed by high temperature tempering, and the tempering temperature is 650 to 670 DEG C.

Provided is an end seal structure of a fuel rail for a gasoline direct injection engine, in which an end or both ends of a rail body composed of a pipe is/are closed by a thread fastening type of an end cap or end caps having a cap-nut shape, is characterized in that a metallic gasket is provided between an inner wall surface of the end cap having the cap-nut shape and an end section of the rail body, the end cap having the cap-nut shape is screwed and fixed to the rail body, and the gasket is tightened by an axial force created by tightening of the end cap having the cap-nut shape so that the end of the rail body is sealed.

Provided is an end seal structure of a fuel rail for a gasoline direct injection engine, the end seal structure being characterized in that: a collar is joined by brazing to an outer circumference of an end of a pipe of the rail body including a pipe; the end cap having a cap-nut shape and including a sealing projection on an surface thereof facing the opening at the end of the pipe of the rail body, is screwed and fixed to the collar; and the sealing projection of the end cap brings into pressure contact with the end of the opening of the rail body by an axial force created by tightening of the end cap having the cap-nut shape to seal the end of the opening of the rail body.

The invention discloses a flame brazing process method for stator coil bars and connector plates of a power generator. The flame brazing process method comprises the following steps: removing oxides and pollutants in a brazing area and the surfaces of brazing materials through mechanical cleaning and organic solvent cleaning; wrapping insulation parts of the coil bars with water-soaked fireproof cloths; placing brazing pieces between the end parts of the coil bars and the connector plates, and clamping and fixing the brazing pieces by clamping tools; heating a brazed joint by a double-end welding torch, aligning two air nozzles of the welding torch with the connector plates at the two sides of the joint respectively, adjusting the welding torch to heat by virtue of a flame, enabling the double-end welding torch to move back and forth at a constant speed along the connector plates at the two sides during the heating process, and meanwhile, uniformly heating connection plates at the two sides, starting to fill with brazing wires when an area to be brazed is heat to dark red, and stopping heating after surrounding brazing seams are fully filled; and after the joint is cooled, mechanically removing oxides and redundant brazing materials on the surface of the joint. The flame brazing process method disclosed by the invention is simple, convenient and practicable, high in applicability, and capable of remarkably improving heating efficiency, temperature uniformity and joint brazing quality relative to a conventional flame brazing process.

The invention relates to the technical field of welding ring manufacture, in particular to a brazing ring and a brazing system. The brazing ring comprises brazing filler metal. The brazing filler metal comprises an inner brazing filler metal layer and an outer brazing filler metal layer, wherein the inner brazing filler metal layer has a first melting point, the inner brazing filler metal layer iswrapped by the outer brazing filler metal layer, the outer brazing filler metal layer has a second melting point, and the second melting point is higher than the first melting point. According to theimplementation manner, the brazing ring is designed into the composite structure comprising the inner brazing filler metal layer and the outer brazing filler metal layer, in the later period of brazing, when the outer brazing filler metal layer is solidified, the inner brazing filler metal layer is still in the liquid state, pores and small gaps between welded pipes can be further filled, the flow time of the brazing filler metal is prolonged, and the brazing quality is improved.

The invention discloses an integrated technique for hard alloy brazing and heat treatment for a cutting pick. The technique is characterized by including the steps of A, feeding; B, die forging; C, machining; D, hard alloy brazing; E, heat treatment; F, surface treatment. The technique has the advantages that brazing quality is improved greatly, technical indexes of heat treatment meet the condition requirements, productivity is improved effectively, production cost is reduced, work environment is improved, and environmental pollution is reduced greatly.

The invention discloses an automatic brazing process for heating disc production. The process comprises the following steps: (1) aluminum brazing flux pulp is prepared, and is brushed on the surfacesof a heat conducting aluminum plate and a stainless steel disc; (2) aluminum welding paste is injected in a to-be-brazed position of the heat conducting aluminum plate by adopting a glue dispensing mode; (3) an aluminum welding piece roll is punched to prepare a welding piece with a preset shape; and then, the welding piece is automatically fed to the stainless steel disc coated with an aluminum brazing flux for assembly; and (4) the heat conducting aluminum plate and an aluminum heating pipe are assembled for the first time; then, the heat conducting aluminum plate and the stainless steel disc to which the welding piece is attached are assembled for the second time; and then brazing is performed. Automatic and intelligent novel welding materials are obtained through the process, and the welding paste and the aluminum welding piece are used in the process, automatic and intelligent elements are embodied, and the process is green in operating environment, improves the brazing quality and the brazing efficiency, reduces the manufacturing cost, and really achieves the purpose of replacing workers with machines.

A ballastless track structure includes a foundation and a track slab. The foundation and/or the track slab is made of metal plates; each metal plate comprises a first panel, a second panel and a plurality of hollow tubes arranged between the first panel and the second panel, and brazing layers are arranged between the hollow tubes and the first and second panels correspondingly; and at least one end of each hollow tube is provided with a flange. On the one hand, the ballastless track structure has the advantages of light dead weight, large strength, stable structure, high bearing capacity, sound insulation and noise reduction, high temperature resistance, vibration resistance, long service life, portability, assembly and the like; and on the other hand, the ballastless track structure canincrease the speed of rail vehicles such as high-speed trains and bullet trains.

The invention discloses a temperature equalization method for the temperature field of an aluminum plate-fin typed radiator vacuum brazing furnace, which belongs to a temperature equalization method for the temperature field of a vacuum brazing furnace and aims at providing a method for guaranteeing a more uniform product temperature at varied positions in the vacuum furnace. The invention has specific methods that: 1) a furnace body mathematical model is established; 2) a product mathematical model is established according to a heat conduction formula; 3) a simulation heating curve is set and a simulation temperature field is established on a computer according to an actual art heating curve and a thermal radiation formula; 4) the simulation heating curve is modified according to the actual temperature; 5) the putting position of the product mathematical model in the furnace body mathematical model is adjusted according to the distribution of the high temperature and low temperature areas of simulation temperature fields; 6) the putting of the products in actual production is guided according to rules for putting products and the correctness of the simulation heating curve is validated according to the actual temperature. The temperature equalization method provided by the invention can effectively improve the uniform temperature of products in the vacuum furnace, thus being an ideal method for improving the vacuum brazing quality of the aluminum plate-fin typed radiator.