119 results about "Weld strength" patented technology

The present disclosure provides an apparatus and method for manufacturing a secondary battery, in which it is possible to minimize damage to a separator and increase welding strength by maintaining a safety distance between a stack of an electrode assembly and a current collector and also securing good adhesion between an electrode tab and a current collector when the current collector is welded to the electrode assembly. The apparatus for manufacturing a secondary battery includes a side pusher disposed to correspond to an electrode assembly having an electrode tab and formed to move and press a sub-tab, which will be welded to the electrode tab, toward the electrode tab through linear movement, a first driving module that allows the side pusher to linearly reciprocate, a support jig installed so that a position thereof is adjustable between the electrode assembly and the side pusher, and a second driving module configured to stop movement of the support jig while the sub-tab is in contact with the electrode tab and allow the support jig to block a pressing force of the side pusher from being further transmitted to the electrode tab.

The present invention provides a secondary battery and a secondary battery module having excellent welding strength between an opening part of an outer can and a lid member.　The secondary battery according to an embodiment has the outer can with a bottom wall, a side wall, and the opening part, an electrode group housed in the outer can, and the lid member fixed to the opening part of the outer can by a welded part. In a cross section taken along the housing direction of the electrode group, the welded part has a first connection part that connects, on the inside of the outer can, the side wall to a bottom face of the lid member. The first connection part is recessed toward the outer can exterior of the welded part.

The utility model provides a kind of welding equipment, including mobile robot, welding adjusting device, welding torch and wire feeder, welding adjusting device is installed in mobile robot, for adjusting the position of welding torch and wire feeder;Wherein, welding torch is replaceable, tungsten needle structure, driving assembly and limiting component are all installed in gun main body, driving assembly and tungsten needle structure are movably connected, to make the tip of tungsten needle structure swing in the process of revolution.In the present scheme, mobile robot can adjust welding adjusting device, improve the degree of freedom of welding torch and wire feeder;Driving assembly and limiting component jointly act, make the tip of tungsten needle structure swing when it revolves, destroy the surface tension of liquid solder at weld, expand the welding area of single welding, improve welding efficiency;At the same time, so set, rotating arc evenly distributes heat, reduces welding defect, improves weld strength.

The application discloses an oriented structure graphene / copper composite filler metal, graphene is coated on the surface of flaky copper powder, and then is compacted, so that the graphene and copper are closely arranged in layers and intervals. The application further discloses a preparation method of the oriented structure graphene / copper composite filler metal, comprising the following steps: taking the flaky copper powder coated with graphene to perform hot-pressing sintering or discharge plasma sintering, so as to obtain the oriented structure graphene / copper composite filler metal. The application further discloses a sandwich composite brazing structure. The application further discloses application of the oriented structure graphene / copper composite filler metal and the sandwich composite brazing structure in ceramic and metal welding. The application further discloses a welding method. In the oriented structure graphene / copper composite filler metal, the graphene and copper are closely arranged in layers and intervals, and the arrangement orientation of the graphene is kept consistent; when brazing, the graphene can effectively hinder active elements such as Ti from corroding the copper matrix, reduce the residual stress of the welded joint, and improve the welding strength.

The invention relates to an aluminothermy welding flux for a zinc-clad steel grounding material and a welding method of the aluminothermy welding flux, and belongs to the technical field of metal material welding. In order to solve the core technical problem that joint potential matching and welding firmness compatibility are difficult to realize by an existing aluminothermy welding flux for the zinc-clad steel grounding material, the invention provides the aluminothermy welding flux for the zinc-clad steel grounding material. The aluminothermy welding flux comprises iron oxide powder, aluminum powder, tin powder and nickel powder. According to the invention, the iron-based welding flux is compounded with tin and nickel, and the tin and the nickel have a synergistic effect, so that the technical prejudice that the iron-based welding flux is difficult to adapt to zinc-clad steel welding in the field is overcome, and the unexpected technical effect is realized. The tensile strength of the connector is larger than or equal to 620 MPa, the corrosion rate is smaller than 0.05 mm / year, the conductivity loss is smaller than 5%, and the performance is obviously superior to that of a copper-based connector. The problem of compatibility of potential matching and welding firmness is fundamentally solved, galvanic corrosion is eliminated, the process is simple and convenient, the cost is controllable, and corrosion prevention and engineering reliability are greatly improved.

This invention discloses a process and apparatus for improving the quality of spiral welded pipe welds, relating to the field of spiral welded pipe weld quality control technology. It includes a positioning frame, a weld rolling device, a medium-frequency heating device, and a laser tracking device. The positioning frame is installed on a pre-set steel rail, and the spiral welded pipe passes through the positioning mechanism. The weld rolling device is installed on the positioning frame and located directly above the spiral welded pipe, used for continuous rolling and forming of the weld on the spiral welded pipe. The medium-frequency heating device is installed on the positioning frame and located on one side of the weld rolling device, and is equipped with a heating section, used for preheating the weld on the spiral welded pipe. The laser tracking device is installed on the positioning frame and located on the side of the weld rolling device away from the medium-frequency heating device, used for detecting changes in the weld shape and position. This application has the effects of improving weld quality, increasing weld strength, and improving the quality of the anti-corrosion coating.

This invention provides an intelligent selection method for welding materials in pipeline circumferential weld strength matching. Applied to the field of welding material selection technology, the method includes: acquiring the physicochemical properties data of the base material, service environment conditions data, and proposed welding process data of the pipeline to be welded; performing vectorization processing to construct a feature vector of the matching conditions; retrieving a historical welding case database, extracting several sets of historical condition feature vectors, and obtaining the measured yield strength of the weld and the measured yield strength of the base material corresponding to each set of historical condition feature vectors; calculating the historical strength matching coefficient to determine qualified and unqualified samples; fusing the material property data of candidate welding materials into the feature vector of the matching conditions to generate candidate input vectors, and inputting the candidate input vectors into a trained intelligent matching evaluation model to output the predicted fit; when the predicted fit is greater than the recommended confidence threshold, the candidate welding material is determined as the recommended welding material. This improves the efficiency of welding material selection.

This invention relates to the field of new energy vehicle power battery manufacturing technology, specifically a fully automated laser welding and packaging process for lithium iron phosphate battery cells used in new energy vehicles. The process includes: S1. The cell shell is made of 6061 aluminum alloy containing niobium, yttrium, and lanthanum, sandblasted, then ultrasonically cleaned with an ethanol solution containing a silane coupling agent, and dried at 85-95℃; S2. The cover plate is made of 304 stainless steel containing 0.15-0.25wt% zirconium and 0.06-0.08wt% cerium, and the sealing groove is pre-cured with modified polyimide adhesive and then butt-fitted to the shell; S3. The weld seam is pre-coated with a nano-coating containing 0.1-0.3wt% titanium hydride, pulsed welded using a 1064nm fiber laser, and protected with a mixture of argon, helium, and nitrogen gas; S4. Post-weld annealing, ultrasonic treatment by immersion in a titanate aqueous solution, and finally vacuum drying. This process optimizes the shell and cover plate materials, resulting in stable welding quality, high weld strength, good corrosion resistance, improved cell sealing performance and long-term reliability, fully automated operation, and excellent production efficiency and product consistency.

The application discloses a kind of FPC temperature acquisition structures, including the temperature acquisition component of connecting aluminum-based FPC, temperature acquisition component includes integrally injection-molded temperature acquisition shell and conductor structure, temperature acquisition shell includes temperature acquisition part with temperature sensor and positioning part with connecting window, conductor structure is formed by copper material connecting piece and aluminum material connecting piece composite Copper material connecting piece is extended to temperature acquisition part and connected with temperature sensor, and aluminum material connecting piece is welded with aluminum-based FPC at connecting window position, the combination of same metal is better, welding strength is high and contact area is large, improve electrical contact performance, so that temperature information collected by temperature sensor can be reliably transmitted to FPC product, this conductor structure is designed using copper-aluminum composite structure, with high bonding strength, excellent conductivity and thermal conductivity, easy to weld, low contact resistance characteristics, can meet the welding requirements of conductor structure and aluminum-based FPC, also can reduce production cost, improve product performance.

The valve assembly's connector and valve seat are welded together. The first and second welding surfaces are at an angle to the axial direction of the valve assembly, meaning both are inclined. The first and second welding surfaces are welded together. With the axial dimension of the welding surfaces remaining constant, compared to a design where the first and second welding surfaces extend axially, the inclined arrangement increases the welding area, thus improving weld strength. During the insertion of the connector into the valve seat's mounting hole, the valve seat and connector are guided by the inclined second welding surface, facilitating connector insertion. Because the first and second welding surfaces are at an angle to the axial direction of the valve assembly, the fit between them during connector insertion determines the insertion depth, reducing the risk of excessive weld seams due to incomplete connector insertion.

The utility model relates to the technical field of rail vehicles, provide rail vehicle side wall unit. It includes stand, crossbeam and first contact block, the stand verticality sets up and is longitudinally along linear interval distribution, the stand transversely bends, the crossbeam is along longitudinal horizontal arrangement and is along the stand interval distribution in vertical direction, the crossbeam is welded on the side wall of the stand bending inboard, the first contact block sets up in the side wall of the stand bending inboard, every the crossbeam's upper, lower both sides are equipped with the first contact block, and the first contact block is in contact with the side wall of the crossbeam upper, lower both directions, when the stand stress makes it tend to further bend, the first contact block will extrude the side wall of the crossbeam from upper and lower both sides. This rail vehicle side wall unit can reduce the impact effect to the welding position in the stress process, thereby reduce the demand to the welding strength, indirectly improve the overall structural strength.

The utility model relates to the technical field of batteries, and provides a battery management system and a battery pack. The battery management system includes a circuit board and a busbar. The circuit board is provided with a connecting hole. The busbar includes a body portion and a connection portion. The connecting part and the body part are arranged at an angle. The connecting part passes through the connecting hole from the first side of the circuit board and is welded with the circuit board at the second side of the circuit board. Therefore, the welding difficulty can be reduced, and the welding strength is improved.

The application relates to the technical field of blade battery, and provides a welding structure of a tab and a connecting sheet and a welding assembly thereof. The welding structure comprises a tab located on one side of the length direction of a pole group and a connecting sheet; the connecting sheet has a tab connecting part and a pole connecting part connected with each other; the tab connecting part comprises first clamping ears and second clamping ears which are arranged at intervals along the thickness direction of the connecting sheet; the first clamping ears and the second clamping ears are both formed by stacking at least one layer of metal foil material; the tab is clamped between the first clamping ears and the second clamping ears, and the three are connected through ultrasonic welding; meanwhile, the thickness of the tab, the thickness and the number of layers of the metal foil material are limited. The welding structure of the tab and the connecting sheet can not only improve the welding strength of the tab and the connecting sheet, the tensile and vibration impact resistance, but also improve the welding yield, so that the production line production yield and efficiency can be improved, the cost loss can be reduced, and the quality and use reliability of the battery cell can be improved.

A high-efficiency welding processing equipment for seamless tubes with low shear loss rate includes a raw tube roller conveyor, a raw tube rear end clamping and extrusion device, a raw tube preheating device, a raw tube forging device, a raw tube front end clamping and positioning device, and a tunnel-type heating furnace. The raw tube rear end clamping and extrusion device is located on both sides of the raw tube roller conveyor and uses hydraulic power to achieve radial clamping of the raw tube. The bottom of the raw tube rear end clamping and extrusion device has a track and uses hydraulic power to apply axial extrusion force to the clamped raw tube. The raw tube preheating device is an annular induction heating device. The raw tube forging device has multiple arc-shaped forging dies arranged circumferentially inside. Multiple front end clamping and positioning devices are located on both sides of the raw tube roller conveyor, which passes through the tunnel-type heating furnace. This invention can achieve endless rolling of tension reduction process using the welded raw tube, reducing the shear loss rate. The forging process in this invention can significantly improve the welding strength of the weld and reduce the occurrence of fractures in thick-walled raw tubes during processing.

The present application relates to the technical field of batteries. Provided are a battery cell and an electric device. In the present application, the battery cell comprises a cell body and a connecting piece. The cell body is provided with a plurality of stacked tabs, the plurality of tabs forming a pre-welding region by means of ultrasonic welding. The connecting piece comprises a first connecting portion, a bending portion and a second connecting portion which are connected in sequence, wherein the bending portion has at least two separated sub-layers, such that the connecting piece can bend at the bending portion. The pre-welding region is connected to the first connecting portion by means of ultrasonic welding, and the second connecting portion is configured for connecting to the tabs and an external circuit. In this way, the welding quality and welding strength between the tabs and the connecting piece can be improved, thereby improving the quality of the battery cell.

The application discloses a galvanized giga-pascal steel gas shielded welding wire and a three-layer plate lap welding method, and belongs to the field of plated ultra-high-strength steel sheet welding. The chemical composition of the welding wire is as follows: C: 0.13-0.15%, Mn: 1.50-1.78%, Si: 0.85-1.10%, and the remaining components are Fe and inevitable impurity elements brought in during smelting; wherein the impurity elements are strictly controlled, the mass percentage of P is less than or equal to 0.02%, and the mass percentage of S is less than or equal to 0.025%; the application adopts low-cost pure CO2 single protective gas throughout the whole process, and discards high-priced mixed protective gas; meanwhile, the welding wire adopts a low-cost alloy system of carbon, silicon and manganese, and under the premise that the weld strength is better than that of the existing ER120S-G welding wire, the raw material cost of the welding wire and the overall welding production cost are greatly reduced. The application adopts a single-pass one-time forming welding process, and does not need secondary welding, post-welding quenching, tempering and other auxiliary processes, and high-quality connection can be completed by single welding, so that the process flow is greatly simplified, and the production efficiency is improved.

This application relates to the field of brazing technology, and more particularly to active solders and their applications. The active solder comprises the following components in the following proportions: copper, 45wt%–85wt%; indium, 15wt%–50wt%; titanium, 1wt%–5wt%; and tin, 0.5wt%–2wt%. The active solder of this application is suitable for welding ceramics to low-melting-point metals or alloys (≤600℃). The technical solution of this application uses a copper-indium system as the main component of the active solder. By adding an appropriate amount of titanium to the copper-indium system, the welding strength between ceramics and low-melting-point metals or alloys is improved. During the welding process, the titanium in the active solder migrates to its surface and combines with carbon atoms, nitrogen atoms, and other atoms in the ceramic to form an interfacial phase, making the solder joint between the ceramic and the low-melting-point metal or alloy less prone to detachment. Furthermore, by adding an appropriate amount of tin, the hardness of the weld joint can be reduced, its toughness enhanced, and the welding strength between the ceramic and the low-melting-point metal or alloy further improved.

The invention relates to the technical field of tin alloy solder, and discloses a preformed soldering lug with high welding strength, which comprises a soldering flux layer and a soldering lug main body, the soldering flux layer comprises esterified rosin, methyl ester, succinic acid, glutaric acid, cyclohexylamine hydrochloride and isopropanol; the soldering lug main body comprises tin, antimony, silver, bismuth, copper and nickel; by adding silver, bismuth, copper, nickel and metal elements in the alloy into the soldering lug, the mechanical strength of the solder alloy can be improved, compared with common tin-copper alloy, the mechanical strength of the soldering lug is greatly improved, the soldering flux is high in activity but low in corrosivity, stable high-mechanical-strength intermediate layer alloy is formed, and the soldering flux can be applied to the field of soldering. The welding strength and the tensile strength are more excellent, the soldering flux layer and the soldering lug main body have the synergistic effect, so that a welded part has high tensile property after being welded, and the mechanical strength of the solder alloy can be improved by adding silver, bismuth, copper and nickel in the alloy into the soldering lug and metal elements.

This invention discloses a welding system for an automotive tubular beam assembly, belonging to the field of automotive laser welding technology. It includes a welding table for laser welding an outer tubular beam and an inner tubular beam. The welding table has an inner tubular beam support welding module, a welding working surface module, and a spin adjustment module arranged horizontally in sequence. A workstation scaffold is located on one side of the welding table, and a combined fusion welding module is connected to the workstation scaffold via a hydraulic device. The inner tubular beam support welding module includes a support base mounted on the welding table, with clamping openings on the support base. This invention achieves synchronous downward movement of the combined fusion welding module, which drives the inner expansion component and electromagnetic pressure plate to press down synchronously. Multiple synergistic effects between the inner and outer tubular beams, through the inner expansion component squeezing the inner tubular beam, ensure a tight fit between the inner and outer tubular beams. Combined with laser welding and fusion welding, this effectively eliminates defects such as incomplete welds and porosity, resulting in a uniform and strong weld formation and significantly improved welding strength.

The utility model relates to test tool technical field, concretely relates to a torque test wrench. Torque test wrench includes: torque wrench, and the prying lever subassembly of setting in torque wrench one end, torque wrench includes handle, torque lever and connecting head connected in proper order, digital display module is provided with on torque lever to show the torque that torque lever bears, prying lever subassembly includes connecting sleeve and the extension arm connected with connecting sleeve, connecting sleeve with connecting head fixed connection, and the extension arm is used for prying to the thing that waits to pry. Adopt above -mentioned mode, can be more intuitive reliable when detecting aluminium row welding strength, can also avoid damaging the aluminium row of good welding.

This invention discloses a welding device for the production of metal parts, relating to the field of metal parts processing technology. The invention includes: a main body with a slide rail on the top of its inner wall; an electric telescopic rod inside the slide rail; a welding mechanism fixedly installed at the bottom of the telescopic end of the electric telescopic rod; and two symmetrically mounted, rotatably rotating electric rotating rods on the inner sidewalls of the main body. The outer wall of each electric rotating rod has a non-self-locking spiral groove. This invention, through the use of simple mechanical structures such as a U-shaped telescopic frame and a U-shaped elastic clamp, can adaptively complete the positioning and flipping during the welding process according to the size of the parts, avoiding the limitation of welding only one side of the part in a single operation. This effectively improves the efficiency and comprehensiveness of part welding. Simultaneously, when the U-shaped telescopic frame resets, the U-shaped elastic clamp continuously contacts the part, preventing the weld from being insufficiently fixed and thus reducing the welding strength.

The present disclosure provides a base fixing assembly for semi-solid batteries and an ultrasonic welding device. The base fixing assembly for semi-solid batteries comprises a rack, a bottom clamping assembly and a side clamping assembly. The bottom clamping assembly is arranged at the bottom of the rack to fix the bottom clamping assembly to the rack. A positioning cavity is formed in the middle of the bottom clamping assembly. The side clamping assembly is arranged on one side of the bottom clamping assembly. The side of the side clamping assembly facing the positioning cavity is provided with a fixing groove. The fixing groove and the positioning cavity together form a mounting area. The mounting area is used to accommodate the semi-solid battery, so that the bottom of the semi-solid battery is fixed in the positioning cavity, and the side of the semi-solid battery is fixed in the fixing groove. The device adds the bottom clamping assembly and the side clamping assembly, which better ensures the reliable stability of the welding operation of the semi-solid battery in a high-frequency mechanical vibration environment, thereby improving the welding strength.

This invention relates to a laser welding method for parts on the back of mirror-finish stainless steel sheet. The method includes: aligning the parts to be welded with a stainless steel foil sheet, the stainless steel foil sheet including a protrusion extending outward along the contour of the surface to be welded of the parts; and using laser spiral spot welding to weld multiple weld points formed by welding the protrusion around the circumference of the parts in a symmetrical sequence to the back of the mirror-finish stainless steel sheet. This method utilizes the stainless steel foil to reduce the rigidity of the parts to be welded, and the full deformation of the stainless steel foil during welding, combined with the spiral spot welding method to increase the diameter of the weld points, and welding in a symmetrical sequence, utilizes extremely low heat input to reduce the tensile stress on the mirror-finish stainless steel sheet during laser welding. This solves the problem of mirror deformation caused by tensile stress generated by the weld or weld points when welding parts to the back of mirror-finish stainless steel sheet, while also preventing the parts to be welded from shaking. The welding strength far exceeds the design requirements, which is beneficial for improving product quality, saving processes, and reducing costs.

The utility model discloses a kind of electric core structure, battery and electric equipment, electric core structure includes pole piece and tab. Pole piece has empty foil area. Tab includes exposed part and inner connecting part connected with each other, exposed part is suitable for connecting protection circuit, and inner connecting part connects empty foil area. Among them, inner connecting part includes first connecting part and second connecting part, first connecting part is welded with pole piece, second connecting part is bonded with pole piece, and second connecting part is located at the outside of first connecting part. The scheme can be auxiliary to improve the connection strength of tab and pole piece by bonding, reduce the welding strength requirement, effectively reduce the situation that base material is broken down by overwelding, avoid the situation that tab and pole piece welding tension cannot be met by less welding, guarantee the stability and reliability of tab and pole piece assembly connection, improve battery performance.

The application provides a connecting tab, a battery, a battery pack and an electric device. The connecting tab comprises a current collecting layer and a functional layer. The functional layer is arranged on at least part of the surface of the current collecting layer. The absorption rate of the functional layer to laser is greater than that of the current collecting layer to laser. The functional layer is partially soluble in the electrolyte. The connecting tab can solve the technical problem that the absorption intensity of the connecting tab to laser is low in the prior art, and the phenomenon of poor welding such as virtual welding and empty welding easily occurs in the process of laser welding, which leads to poor welding strength between the connecting tab, the tab and the electrode terminal, and greatly affects the safety performance and use reliability of the battery. Meanwhile, the functional layer is soluble in the electrolyte, and the technical problem that the solid impurities formed by the falling of the coating material in the battery have a potential negative impact on the safety performance and reliability of the battery can also be solved.

This invention relates to the field of material injection molding technology, specifically to a high-strength hemp fiber composite material and its injection molding process. This invention overcomes the problems of low interfacial weld strength and poor formability in existing fiber composite materials. The injection molding process of this invention first involves extruding and granulating a fiber mixture, treated carbon fibers, resin, and crosslinking agent under low-temperature control to obtain the composite material. Then, pre-impregnated carbon cloth is positioned within the mold cavity. During the injection molding stage, variable pressure wavefront control is implemented. The first stage uses low-speed injection to smoothly compact the high-viscosity melt into continuous carbon cloth. The second stage involves high-speed mold filling, utilizing high shear heat to precisely trigger the unsealing and ring-opening of the latent crosslinking agent, forming a three-dimensional covalent bond network. Finally, a stepped high-pressure holding process eliminates reactive micropores. This process solves the molding defects of natural fiber carbonization due to heat and the easy erosion of carbon cloth inserts, improving the interlayer bonding strength and mechanical strength of the injection-molded parts, and is suitable for the manufacture of large lightweight automotive structural components.

This utility model provides a slide rail positioning type weld strength testing fixture, relating to the field of testing fixture technology. It includes a base frame, the top of which is provided with a multi-directional positioning structure. The multi-directional positioning structure includes a mounting plate, the bottom of which is fixedly connected to the top of the base frame. A hydraulic telescopic rod is fixedly mounted on one side of the mounting plate, and a U-shaped clamping plate is fixedly connected to the output end of the hydraulic telescopic rod. An adjustable support structure is provided inside the base frame. By setting up the multi-directional positioning structure, the opposite sides of the weldment can be auxiliaryly limited under the action of the U-shaped clamping plate and the fixed plate, thus ensuring the weldment is firmly fixed. Simultaneously, under the action of the first screw and the clamping plate, the other two sides of the weldment can be auxiliaryly clamped and limited, thus ensuring the weldment is firmly clamped and preventing positional displacement during testing, which would affect the test results.