21results about How to "Low soldering temperature" patented technology

The invention provides an optical fiber penetration piece which comprises a penetration main piece, the penetration main piece is used for penetrating through an equipment shell, the penetration main piece is of a hollow structure with two open ends, the two open ends of the penetration main piece are respectively provided with a sealing assembly, and the sealing assemblies are provided with a plurality of through holes for armored optical fibers to pass through. The armored optical fiber comprises an optical fiber body and a protective sleeve, the optical fiber body is metalized, the protective sleeve is of a gold-plated structure, and the metalized optical fiber body is welded and connected with the gold-plated protective sleeve at the two ends of the protective sleeve through tin-antimony solder or tin-gold solder. The tin-antimony solder or the tin-gold solder has relatively low welding temperature, so that thermal damage to the optical fiber body can be reduced, the optical fiber body is prevented from being damaged due to overheating, and continuity and high quality of signal transmission are maintained; meanwhile, the tin-antimony solder or the tin-gold solder has good flowability and wettability and can be uniformly distributed at the connecting part of the optical fiber body and the protective sleeve, so that damage to the optical fiber body caused by local stress concentration is avoided.

The invention discloses a vacuum diffusion bonding method for a nickel-based superalloy and MoNbTaW series refractory alloy, and aims to solve the problem that the quality of a welding joint is affected due to the fact that the welding joint of the nickel-based superalloy and the MoNbTaW series refractory alloy can generate a Cr-rich brittle phase. The vacuum diffusion method comprises the following steps: 1, polishing the nickel-based high-temperature alloy and the MoNbTaW series refractory alloy; secondly, nickel sulfate, nickel chloride, nickel borate, sulfuric acid, lauryl sodium sulfate and water are mixed, an electroplating solution is obtained, the nickel-based superalloy is electroplated, an electroplated nickel grain layer is obtained, and the MoNbTaW series refractory alloy and the nickel-based superalloy are jointed; thirdly, the to-be-welded part is placed in a vacuum diffusion furnace; and 4, performing vacuum diffusion bonding. According to the method, the electronickelling grain layer is used, connection is conducted at the relatively low temperature and the relatively low pressure, only interdiffusion of the electronickelling grain layer and refractory alloy in a small range exists on a connector interface, a Cr-rich brittle phase is not generated, and cracks are prevented from being generated in the connector.

The invention belongs to the technical field of intelligent manufacturing equipment, and particularly relates to a cutting tooth machining and welding device of a coal mining machine. The device further comprises an electromagnetic induction heating assembly, a plurality of sets of material supporting mechanisms, a rotary bearing mechanism, a special-shaped degree detection feedback mechanism, a welding speed and temperature automatic regulation and control mechanism and a PLC. According to the cutting pick welding device, the hard alloy head and the cutting pick body can be rapidly welded together in the cutting pick machining process, the cutting pick can automatically rotate during welding, then it is guaranteed that all parts of the cutting pick are evenly heated during welding, the special-shaped degree of the welding position of the cutting pick can be rapidly detected before welding, and the welding precision is improved. And specific information obtained through detection is fed back to the welding work in a current change mode, so that the welding temperature and the welding speed are more accurately regulated and controlled, and the welding speed and the welding temperature in the welding work can be quickly regulated to achieve the optimal setting.

The invention belongs to the technical field of battery box body welding, and discloses a water-cooling battery box body applying an FSW welding technology, the water-cooling battery box body comprises an aluminum alloy box body, the aluminum alloy box body comprises an upper shell, a lower shell, a fixed side skirt and a predetermined welding groove, the upper shell and the lower shell are symmetrically arranged up and down, and the upper shell and the lower shell are symmetrically arranged up and down; a fixed side skirt is integrally formed on the outer side faces of the ends, close to each other, of the upper shell and the lower shell. According to the method, the battery box is fixed through the clamp made of steel, the bolts and the positioning pins, displacement in the welding process is effectively prevented, the welding precision and stability are guaranteed, meanwhile, fine adjustment is conducted on welding parameter setting, including the rotating speed of a welding tool, the feeding speed, the diameter of the tool, the shoulder width of the tool and the like, and welding quality is improved. Therefore, the uniformity of the welding process and the quality of a welded joint are ensured. In the welding process, preheating treatment and reasonable welding sequence and welding position planning are adopted, and the welding efficiency and the joint quality are further improved.

The utility model discloses a one-way valve part, flow path switching subassembly, heat exchanger, air conditioning system and air conditioner, one-way valve part includes: one-way valve, first pipe section and second pipe section. One-way valve includes first casing, second casing and valve core, and first casing and second casing are directly welded and are connected and are limited to one-way flow channel, is equipped with the export on first casing, is equipped with the import on second casing, and the valve core is located in one-way flow channel, and one-way valve is by import to export one-way conduction, first pipe section one end is connected in the export place, and first pipe section is connected with first casing through first soldering material and is welded, and second pipe section one end is connected in the import place, and second pipe section is connected with second casing through second soldering material and is welded. According to the one-way valve part of the utility model, the quality and the yield of one-way valve part are high, and production efficiency is high and cost is low.

The invention provides a high-temperature-resistant small optical system packaging structure and packaging method, and relates to the technical field of optical system packaging. According to the packaging method, firstly, high-temperature-resistant ceramic is used for preparing a high-temperature-resistant ceramic packaging structure base, and then small optical systems formed through sequential stacking are bonded to the high-temperature-resistant ceramic packaging structure base; and then, in a water-free and oxygen-free environment, an indium-based sealing welding ring is used, and welding among the high-temperature-resistant ceramic packaging shell, the indium-based sealing welding ring and the high-temperature-resistant ceramic packaging structure base is completed at low temperature. The thermal damage of low-temperature welding to devices in a small optical system is small, the residual thermal stress is small, the air tightness of a physical system is good, and the obtained packaging structure can keep high stability and air tightness in a high-temperature environment. The packaging structure base and the packaging shell of the packaging structure are both made of high-temperature-resistant ceramic, the overall thermal expansion of the packaging structure is consistent, and damage caused by inconsistent stress when the packaging structure works in a high-temperature environment is avoided.

The invention relates to an aluminum alloy precise solid-state welding method based on a vacuum hot pressing sintering process. According to the method, Al powder, Mg powder, Si powder, Ti powder and Cu powder are mixed according to a certain proportion, then the mixed powder is subjected to cold press forming in advance, the influence caused by an oxidation film on the surface of the aluminum alloy is eliminated by means of elements such as Mg and Si in a vacuum environment, complex pretreatment does not need to be conducted on the aluminum alloy, and then solid-state precise welding of the aluminum alloy material is achieved. The method is easy and convenient to operate, and the requirement for aluminum alloy pre-welding pretreatment is low; in the welding process, base metal and mixed powder are both in a solid state, the welding temperature is low, the size precision is high, deformation is small, and the defect rate is low.

The invention discloses a submarine cable lead sheath and a lead sheath repairing method, the lead sheath is a cylindrical lead sheath formed by splicing at least two lead plates with arc-shaped longitudinal sections, the two sides of each lead plate are respectively provided with a plurality of clamping jaws extending outwards, the front side of the extending end part of each clamping jaw is provided with a bulge, the rear side of the extending end part of each clamping jaw is provided with a groove, and when the two adjacent lead plates are spliced, the bulges are clamped in the grooves. And the clamping jaw bulge of one lead plate is inserted into the groove of the clamping jaw of the other lead plate. The lead sleeve adopts a splicing structure, and the lead sleeve is directly spliced outside the submarine cable to be repaired, so that the inner diameter of the lead sleeve is close to the outer diameter of the buffer waterproof layer, and the workload of drawing, detaching and repairing an original protective layer is reduced; the clamping jaws of the lead sleeve can be automatically fixed after being spliced and are provided with welding rods, so that the fixing procedure is reduced.

The application provides a precision preformed soldering piece and a preparation method thereof. By arranging a graphene layer between the preformed soldering piece and a flux layer, the welding quality and efficiency can be improved, the energy consumption and environmental pollution in the welding process can be reduced, the welding strength and corrosion resistance can be improved, the oxidation and thermal stress in the welding process can be reduced, the cavity rate can be reduced, the precision can be improved, fullerene is added in the alloy raw material, the fullerene has high chemical stability and strong mechanical properties, can form strong bonding with rare earth metals, has high heat conduction performance, can effectively dissipate heat, avoids overheating of the welding part to cause failure, significantly reduces the cavity rate, improves the precision of the welding, reduces the welding temperature required by the preformed soldering piece, and has excellent oxidation resistance, which can effectively prevent the oxidation of the metal surface.

The invention relates to the field of lead-free soldering lugs, and particularly discloses an SAC-series lead-free soldering lug and a preparation method thereof. The SAC series lead-free soldering lug is prepared from the following raw materials in parts by mass: 20 to 40 parts of SAC305, 60 to 80 parts of micro-nano copper powder and 1 to 5 parts of Ag3Sn nanoparticles. According to the SAC-series lead-free soldering lug, the micro-nano copper powder and the Ag3Sn nanoparticles are added, and under the synergistic effect of the micro-nano copper powder and the Ag3Sn nanoparticles, the reliability of welding spots and the mechanical performance of the soldering lug are improved.

The invention provides a packaging method of a main-grid-free battery assembly and the main-grid-free battery assembly, each LED lamp bead in an infrared LED lamp box is used for welding each PAD point to obtain a plurality of battery strings, the arrangement position of each LED lamp bead in the infrared LED lamp box corresponds to the projection position of one PAD point in the height direction of the lamp box, and the arrangement position of each LED lamp bead in the infrared LED lamp box corresponds to the projection position of the corresponding PAD point in the height direction of the lamp box. According to the method, lamp box heating of the auxiliary grid is avoided, the grid breaking risk of the auxiliary grid in the infrared LED lamp box is reduced, then heating lamination is carried out on the formed battery assembly, so that the welding strip and the auxiliary grid form alloy connection, and the temperature can be reduced in the lamination process relative to the infrared LED lamp box, so that the welding temperature of the auxiliary grid can be reduced, and the welding quality of the auxiliary grid is improved. Therefore, risks of grid breakage and the like during welding of the main-grid-free battery assembly are reduced, an existing technological process does not need to be changed, and the welding difficulty of the main-grid-free battery assembly can be reduced.

The invention discloses a welding method for a magnesium alloy and stainless steel, and belongs to the technical field of dissimilar material welding, an ultrasonic-assisted contact reaction brazing process is adopted, ultrasonic vibration is transmitted into a zinc layer through the magnesium alloy, the ultrasonic vibration is indirectly applied to the surface of the stainless steel, and proceeding of a magnesium-zinc eutectic reaction is guaranteed; the brazing temperature is selected to be higher than the magnesium-zinc eutectic reaction temperature and lower than the zinc melting point, the contact eutectic reaction of the magnesium alloy and zinc is achieved, meanwhile, the integrity of a zinc layer is guaranteed, formation of magnesium-zinc brittle compounds is controlled, the strength of a connector is improved, the welding temperature is low, energy is saved, environment friendliness is achieved, and the welding efficiency is high; the ultrasonic-assisted contact reaction brazing method for the magnesium alloy and the stainless steel is provided for the first time, low-temperature welding of the magnesium alloy and the stainless steel in the atmospheric environment is achieved, cost is low, operation is easy, and energy conservation and emission reduction are achieved.

The invention provides a double-face symmetrical synchronous friction stir welding device. Comprising two different types of stirring tools, the end part of one stirring needle is provided with a bulge (a convex stirring tool for short), the end part of the other stirring needle is provided with a recess (a concave stirring tool for short), and the concave and convex parts of the two stirring needles can be embedded with each other. During double-sided synchronous friction stir lap welding, the upper stirring tool and the lower stirring tool are symmetrically distributed along the butt joint face, and the double-sided synchronous friction stir lap welding is carried out at the same rotating speed and the same welding speed. The press-in amount adjusting range of the upper stirring tool and the lower stirring tool is enlarged, the operation difficulty is reduced, and in the welding process, a user does not need to worry about contact abrasion of the upper stirring needle and the lower stirring needle and introduce redundancy to a weld joint. In addition, the method can ensure that an upper stirring tool and a lower stirring tool completely penetrate through a welded workpiece, and the risk of weak combination of the center of a welding seam during double-sided synchronous friction stir welding is eliminated.

The present invention discloses a composite columnar soft solder material and a preparation method and application thereof. The composite columnar soft solder material comprises a single crystal solder column and a thin layer of solder covering the two opposite end surfaces of the single crystal solder column; the contact surface between the single crystal solder column and the thin layer of solder is a specific orientation surface, and the melting point of the thin layer of solder is lower than the melting point of the single crystal solder column. The soft solder material provided by the present invention has a low welding temperature. When applied to the welding of electronic devices, a single crystal solder joint with high yield strength and good anti-electromigration performance can be obtained; by selecting the orientation of the solder joint, the single crystal solder joint has good anti-electromigration and anti-plastic deformation performance at the same time, thereby significantly improving the overall life and reliability of the electronic equipment.

The present disclosure relates to a kind of active solder paste composition for ceramic copper clad, ceramic copper clad method and copper clad ceramic, with the total weight of active solder paste composition as basis, active solder paste composition contains 1-20wt% first metal powder, 75-94wt% second metal powder and the balance of flux;Wherein, first metal powder contains titanium hydride, and second metal powder contains copper phosphorus silver alloy.The active solder paste composition provided by the present disclosure not only can reduce the silver content, but also can reduce the welding temperature, while also increasing the connection strength of Ti and Cu, increase the welding strength, so that material is not easy to occur segregation.

The present invention provides a liquid crystal elastomer flexible device and its preparation method and application, the preparation method comprises the following steps: step S1, preparing a self-repairing liquid crystal elastomer by introducing one or more of dynamic covalent bonds, supramolecular effects or pre-embedded reactive groups into liquid crystal molecules; step S2, overlapping at least two self-repairing liquid crystal elastomer parts, and ultrasonic welding the overlapping parts by applying pressure at room temperature; the self-repairing liquid crystal elastomer is one or more of liquid crystal systems that respond to different stimuli such as heat, light, electricity, magnetism and humidity. The technical solution of the present invention is to design and prepare a self-repairing, weldable liquid crystal elastomer, and to achieve low-temperature, rapid and efficient construction of a complex three-dimensional structure actuator by room temperature and rapid ultrasonic welding, and ultrasonic welding can improve the efficiency of solid phase bonding, effectively maintain the orientation of liquid crystal molecules, and improve the driving stability of the liquid crystal elastomer.

The application discloses a low-temperature high-strength neutral soldering paste and a manufacturing method thereof. The soldering paste has the following raw material formula in percentage by weight: 87-92% of tin-based alloy powder, 3.5-5% of activating agent, 0.5-1.2% of reinforcing agent, 0.5-2% of thixotropic agent and 2-6% of solvent. The alloy components in the tin-based alloy powder and their percentage by weight are as follows: 90-95% of Sn, 2-5% of Ag, 0.2-1% of Cu and 2-6% of Bi. The activating agent is composed of dimethylol propionic acid, sodium phosphate and ammonium fluoroborate according to a weight ratio of 1: (0.1-0.4): (1.5-2). The reinforcing agent comprises reinforcing alumina particles subjected to metallization treatment, and the reinforcing alumina particles have a nanoscale particle size. The soldering paste has the characteristics of low welding temperature, good wettability, improved solder joint shear strength, neutral no post-welding corrosion and the like, and is suitable for precise welding scenes.

A welding area is arranged on one side of a circuit board, a shunt is connected with the circuit board through the welding area, the welding area comprises segmentation bonding pad areas, the left side and the right side of the middle of the circuit board are provided with the segmentation bonding pad areas, and the shunt is connected with the circuit board through the segmentation bonding pad areas. The welding pad is arranged to be the square single-point welding pad, the cross-shaped flow channel is formed, bubbles generated during welding in the peripheral direction can be conveniently dissipated, tin overflowing is prevented, the yield is greatly improved, meanwhile, the square single-point welding pad is slow in heat dissipation and low in welding temperature, existing gas-phase welding can be replaced with reflow welding, and the welding cost is greatly reduced; a temperature monitoring area is arranged to facilitate monitoring of the temperature of the shunt.

The embodiment of the invention relates to the photovoltaic field, and provides a preparation method of a photovoltaic module and the photovoltaic module, and the preparation method comprises the steps: providing at least two battery pieces and a plurality of welding strips, placing the welding strips in preset areas of the battery pieces, and enabling the parts, located in the preset areas, of the battery pieces to be provided with conductive parts; a pre-bonding film is provided, the side, facing the battery piece, of the pre-bonding film is provided with a plurality of positioning grooves, and each welding strip at least corresponds to one positioning groove; covering one side, far away from the battery piece, of the welding strip with a pre-bonding film, wherein at least part of the welding strip is accommodated in the positioning groove; a pressing plate is provided, the pressing plate is arranged on the side, away from the battery pieces, of the pre-bonding film, the welding strip is bonded to the preset area through the pre-bonding film through the pressing plate, and the multiple battery pieces are connected into a to-be-welded battery string; the to-be-welded battery string is sent to a laminating stage, and the laminating temperature is larger than or equal to the melting point of the outer layer of the welding strip, so that alloying of the welding strip and the conductive part is achieved. The embodiment of the invention is at least beneficial to reducing the risk of warping of the battery piece while avoiding the deviation of the welding strip.

The utility model relates to the technical field of semiconductor manufacturing equipment, concretely is a kind of low-cost stainless steel semiconductor heating disc structure, including cover, pedestal, electric heater and shaft column, the side of pedestal and cover connection is provided with annular groove, cover is embedded in annular groove, and cover and pedestal are connected by the welding bead of outer circumferential annular and the electron beam welding connection of several welding spots inside array.It is adopted that the low-cost stainless steel semiconductor heating disc structure uses electron beam welding, avoids the damage of high temperature to electric heater insulating medium, improves heating disc reliability and service life;At the same time, electron beam welding cost is lower, can shorten production cycle, improve production efficiency;Its unique welding structure, such as annular groove cooperation outer circumferential annular welding bead and inside array welding spot, strengthens the connection strength and overall stability;Reasonable welding spot distribution ensures heating uniformity, and the cylindrical protruding design at welding spot improves welding precision.

This invention belongs to the field of power device processing technology, specifically relating to an aluminum nitride ceramic substrate with copper-plated surface and its preparation method. The copper-plated aluminum nitride ceramic substrate comprises an aluminum nitride ceramic plate, a magnetron sputtered copper layer, a tin-silver-copper metal paste, and copper foil, and its composition is carried out according to the following process flow: 1) surface cleaning treatment of the aluminum nitride ceramic substrate; 2) vacuum copper plating on the surface of the aluminum nitride ceramic substrate; 3) tin-silver-copper metal paste printing; 4) stacking copper foil; 5) pre-pressing vacuum furnace welding. This invention provides a method for copper-plating aluminum nitride ceramic substrates, which offers advantages such as simple metallization operation, low welding temperature, high production efficiency, low cost, fewer porosity defects at the substrate-metal layer junction, and strong copper foil adhesion.