53 results about "Undermatching" patented technology

The invention discloses a welding machining method, device and equipment and a storage medium, and relates to the technical field of welding machining.The welding machining method comprises the steps that the size deviation type of a current workpiece to be welded is obtained; wherein the size deviation type comprises at least one of gap deviation, hole position deviation and assembly dislocation deviation; the size deviation value of the current to-be-welded workpiece is determined according to the size deviation type; determining a power compensation value mapped by the size deviation value based on a preset mapping relation; determining an actual power value according to a preset power value and the power compensation value; and when the current workpiece to be welded is welded, the actual power value is applied. By means of the mode, the welding power can be matched with the specific size deviation of the workpiece in real time, the quality problems of overburning, insufficient fusion depth and the like caused by parameter mismatching are avoided, and the stability and consistency of the welding bead quality are improved.

The present application belongs to the technical field of steelmaking production scheduling, and provides a steelmaking production scheduling method and system based on digital twinning and a medium. The method dynamically couples and analyzes cutting action and roller conveying by constructing a continuous casting billet digital twin, judges the matching of cutting and hot charging rhythm, calculates the backlog driving force by using a car-following model for the mismatching case, activates a dynamic buffer zone in combination with a state intensity-space distance model, corrects the casting billet temperature drop rate based on a heat transfer and thermal radiation physical field model, evaluates the hot charging adaptability, establishes a time-space constraint scheduling model, and dynamically optimizes the continuous casting billet generation scheduling. The system comprises a matching identification module, a buffer establishment module, a hot charging analysis module, an adaptability analysis module, and a rhythm adjustment module. The scheme realizes the matching of continuous casting billet cutting and hot charging rhythm, and improves the hot charging adaptability and production efficiency.

The laser filler wire welding in-situ self-learning closed-loop control method for the Fe-Cr-A1 special-shaped component comprises the steps that information of a component to be welded and weld joint characteristics are obtained, and an initial welding program is generated; a multiband composite laser is adopted for welding, meanwhile, welding seam characteristics are monitored, and the wire feeding speed is adjusted in real time; spectral signals and weld pool visual image signals in the welding process are synchronously collected in real time, the current welding defect probability is obtained, and the welding speed is adjusted in real time; and the total laser power is adjusted in real time according to the real-time molten pool temperature and the laser incident angle. The method can effectively solve the problems that the welding track of the special-shaped component is difficult to manually program, welding deformation causes a welding seam gap, and the wire feeding speed is not matched with preset welding process parameters.

The application relates to the technical field of electric arc welding, in particular to a welding device for trolley part machining, which comprises a welding table and a supporting column fixedly installed on the top of the welding table, an active seat is arranged above the supporting column, an elastic unit matched with the active seat is installed on the supporting column, an electric arc welding gun is penetrated through the active seat, a locking piece matched with the active seat is installed on the electric arc welding gun, a synchronous frame used for contacting the end of a contrast group pipe is arranged above the supporting column, the movement of the electric arc welding gun is not controlled by a preset program, but is directly driven by the solid outline of the contrast group pipe through a mechanical mechanism, the risk that the programmed track does not match the actual workpiece is completely avoided, the real-time accurate coincidence of the welding track of the electric arc welding gun and the joint of the workpiece is guaranteed, so that the heating center of the electric arc does not deviate from the joint, and the heat can uniformly act on the two side pipe fittings.

The invention relates to the technical field of solder, in particular to a solder composition and a preparation method and application thereof, and the solder composition comprises a first alloy and a second alloy; the first alloy comprises the following components in percentage by weight: 65-78% of Sn, 18-30% of In and 2-5% of Ag; and the second alloy comprises the following components in percentage by weight: 94-97% of Sn, 2-7% of Ag and the balance of Cu. The solder composition has double melting behaviors before reflow and has high solidus temperature after reflow, so that the problem of hot cracking caused by mismatching of coefficient of thermal expansion (CTE) among a substrate, a package and a welding spot is solved, and the solder composition is suitable for high-reliability electronic packages including BGA, CSP and flip chip assemblies.

The invention discloses an assembly method for preventing thermal mismatch of a device. The assembly method comprises the following steps: carrying out modification treatment on the surface of a welding surface of the device; carrying out modification treatment on the surface of the printed board bonding pad; performing solder paste printing processing on a central bonding pad and a target pin bonding pad of the printed board; correspondingly placing the welding surface of the device and a printed board bonding pad, and realizing interconnection between the device and the printed board through reflow soldering; welding the residual pins of the device and the residual bonding pads of the printed board to complete fixation of the residual pins of the device and the residual bonding pads of the printed board; and reinforcing the part between the device and the printed board. Through modification treatment, rasterization steel mesh printing, step-by-step welding and corner reinforcing design on the surface of the device and a printed board bonding pad, stress concentration caused by mismatching of thermal expansion coefficients of the device and the printed board can be effectively relieved, welding spot cracks and failure risks are reduced, and therefore the installation reliability of the device in the long-term application process is improved.

The utility model relates to a substrate and a PCBA board. The substrate is provided with a plurality of bonding pad parts, the bonding pad parts are arranged around a preset central area at intervals, and each bonding pad part sequentially comprises a first bonding pad section, a second bonding pad section and a third bonding pad section; the first bonding pad section and the second bonding pad section of each bonding pad part are used for adaptively welding a first adapter, and the second bonding pad section and the third bonding pad section of each bonding pad part are used for adaptively welding a second adapter. Therefore, the first bonding pad section and the second bonding pad section of each bonding pad part are combined to form a first composite bonding pad with a smaller size, so as to adapt to a first adapter with a smaller welding size; and the second bonding pad section and the third bonding pad section of each bonding pad part are combined to form a second composite bonding pad with a larger size so as to be adaptive to a second adaptive part with a larger welding size, so that the risks of defects such as component pulling deviation, difficulty in controlling the height of the welding flux, missing soldering or false soldering and the like caused by mismatching of the size of the bonding pad and the amount of the welding flux are greatly reduced, the welding quality is greatly improved, and the production cost is reduced. And the process requirements can be better met.

This invention discloses a real-time detection method and system for steel slag flow based on a triaxial accelerometer, belonging to the field of steel metallurgical process detection technology. It acquires triaxial vibration data to fully capture the impact energy of steel slag in any direction in three-dimensional space, overcoming the signal loss problem caused by the mismatch between the installation direction and the impact direction of traditional single-axis sensors. Based on this, a dynamic threshold pre-screening mechanism is adopted, requiring only the calculation of a few core features to quickly determine the slag-free state. For suspected slag-containing periods, a CNN-LSTM hybrid model is further used for fine identification. The model automatically extracts the nonlinear combinations and temporal dependencies between feature dimensions, achieving accurate classification of four states: initial flow, stable slag flow, and impact of large slag pieces. This invention integrates comprehensive perception, efficient prediction, and intelligent identification, providing a safe, reliable, and low-cost online detection and classification control solution for steel slag flow in the steelmaking process.

The invention discloses an optimization method for welding equipment and a process of a steel annealing and pickling production line. The optimization method comprises the following steps: S1, adopting pure Ar gas as welding shielding gas; s2, replacing a large-diameter protective nozzle; s3, a gas screen is additionally arranged at a protective gas outlet of the welding gun, and a protective net is additionally arranged in the gas screen; s4, the push-pull type wire feeding mechanism is replaced; s5, process parameters of welding equipment are adjusted; and S6, the steel is connected with the titanium material, so that the special connecting band is formed. By improving the welding equipment and optimizing the welding process, the problems of titanium material MIG welding air suction brittle failure, unsmooth wire feeding, parameter mismatching, dissimilar material connection failure and the like are solved, it is ensured that the welding seam quality meets the subsequent annealing and pickling procedure requirement, the welding efficiency adapts to the continuous operation rhythm of a production line, and it is ensured that titanium materials can be produced in batches.

According to the preparation method of the 2.5 D packaging structure provided by the invention, in the process of preparing the 2.5 D packaging structure, the large-size substrate is directly and electrically connected with the rewiring layer, so that compared with a traditional technological process of packaging first and then carrying out substrate mounting, the warping problem of a high-performance and large-size chip packaging structure can be effectively solved, and the reliability of the packaging structure is improved. The problem of pseudo soldering caused by mismatching of thermal expansion coefficients is avoided; according to the preparation method of the 2.5 D packaging structure, the three supporting substrates are respectively and simultaneously subjected to process operation and then combined through bonding, so that the electrical connection quality can be improved, the process time can be effectively shortened, the process yield can be improved, and the thermal stress accumulation problem of the process structure can be improved.

The present application belongs to the technical field of combustion chamber flame tube structure, and particularly relates to a non-metallic composite material combustion chamber flame tube based on elastic connecting structure, which adopts various elastic connecting structures between the inner and outer rings of the non-metallic composite material flame tube and the head ring of the metal material flame tube, changes the thermal matching deformation into elastic matching, has good thermal expansion matching performance, good sealing performance and assembly performance, can maintain good sealing performance under hot state, and effectively reduces the flame tube air leakage problem caused by the mismatch of thermal expansion amount. The elastic connecting structure of the inner and outer rings of the flame tube can effectively disperse the axial and circumferential stress, reduce the stress concentration of the non-metallic composite material, reduce the risk of damage caused by uneven stress of the matrix, and increase the service life of the non-metallic material flame tube. Meanwhile, the present application also has split structure design, which can effectively improve the maintainability of the flame tube, reduce the maintenance cost, and has high engineering application value.

This invention relates to the field of box welding technology, specifically to an explosion-proof control box welding equipment, including a base and a robotic arm, wire feeding module, clamping module, and wire cleaning and cutting module mounted on the base. The robotic arm has a support plate with a fixed pipe fixed to it. Each end of the fixed pipe has a positioning mechanism for clamping the welding wire. A bidirectional lead screw is rotatably mounted on one side of the support plate, and two movable blocks symmetrically connected to the lead screw are threaded onto it. Clamping force is provided by a cylindrical spring, and the compression of the spring automatically matches the thickness of the welding wire. This avoids the problem of mismatch between the welding wire thickness and the clamping force, preventing thinner welding wires from developing indentations, scratches, or even plastic deformation due to excessive clamping force, and preventing thicker welding wires from slipping or experiencing wire feeding speed fluctuations due to insufficient clamping force, thus ensuring welding effect and final product quality.

The invention provides a method for ceramic-steel efficient diffusion bonding and synchronous preparation of metal-based ceramic, and belongs to the technical field of welding. The method comprises the following steps that Al powder, Ti powder and B2O3 powder are mixed and then subjected to ball milling, and intermediate layer powder is obtained; mixing ceramic powder, a binder and an active component, and performing secondary ball milling to obtain a metal-based ceramic precursor; and sequentially assembling a base material, the intermediate powder and the metal-based ceramic precursor from bottom to top into a layered structure to obtain an assembly, and sequentially carrying out cold pressing pretreatment, hot pressing diffusion bonding and cooling on the assembly to obtain the metal-based ceramic. Smooth transition of thermal expansion coefficients is achieved through the middle transition layer, residual stress caused by mismatching of the thermal expansion coefficients of ceramic and steel is effectively restrained in cooperation with an optimized control cooling system, and long-term service reliability of the connector under the thermal cycle condition is guaranteed.

According to the 2.5 D packaging structure and the preparation method thereof provided by the invention, in the process of preparing the 2.5 D packaging structure, the large-size substrate is directly and electrically connected with the rewiring layer, so that compared with a traditional technological process of packaging first and then carrying out substrate mounting, the warping problem of a high-performance and large-size chip packaging structure can be effectively solved, and the reliability of the packaging structure is improved. The problem of pseudo soldering caused by mismatching of thermal expansion coefficients is avoided; according to the 2.5 D packaging structure and the preparation method thereof, the two supporting substrates are respectively and simultaneously subjected to process operation, and then are combined through bonding, so that the electrical connection quality can be improved, the process time can be effectively shortened, the process yield can be improved, and the thermal stress accumulation problem of the process structure can be improved.

A laser welding device and method for a cross-shaped spiral core filling rod and a cross-shaped end plug aim at achieving reliable connection of a special-shaped thin-wall cladding and the end plug, and the device comprises a welding clamp, a front tool, a stepped cross-shaped front end plug, a cross-shaped spiral simulation fuel rod, a stepped cross-shaped rear end plug and a rear tool. The rear end of the cross-shaped spiral simulation fuel rod is connected with the rear tool through a stepped cross-shaped rear end plug; the front end of the cross-shaped spiral simulation fuel rod is connected with the rear end of the stepped cross-shaped front end plug, and the front end of the stepped cross-shaped front end plug is connected with the welding clamp through the front tool. The welding method adopts step-by-step spot welding: firstly fixing the front end plug, and rotating a welding clamp to perform spot welding for four times; the same process is repeated for rear end plug welding; according to the method, the welding seam with narrow welding seam, high surplus height and good air tightness can be formed on the thin-walled tube, the phenomenon that the thin-walled tube is easy to burn through during welding due to mismatching of assembly gaps and non-uniform solder accumulation in the welding process is avoided, and poor tightness and overlarge spacing of the welding seam in the welding process are prevented.

The utility model discloses an automatic ring welding machine for a fire extinguisher cylinder, and belongs to the technical field of fire extinguisher cylinder production. Comprising a rack and a mounting table, and the rack is fixedly connected with the side face of the mounting table. The lower portion of the machine frame is connected with a barrel feeding device for fixing the direction of a barrel, the upper end of the machine frame is connected with a first sliding rail, and the first sliding rail is connected with a lifting device for driving the barrel to ascend in a sliding mode. The upper end of the rack is connected with a first electric cylinder, and an output shaft of the first electric cylinder is fixedly connected with the side face of the lifting device. The two sides of the rack are connected with an upper bottom conveying line and an M bottom conveying line, the two sides of the mounting table are connected with rotary feeding mechanisms, and the lower end of the rack is connected with an assembly feeding device. Clamping devices are connected to the two sides of the upper portion of the mounting table, and a welding gun is connected to one side of the mounting table. The problems that a feeding mechanism in the prior art is not matched, and production efficiency is low and errors are increased due to redundant steps in the prior art are solved.

The invention relates to the technical field of wear-resistant pipelines, and discloses a bimetal double-layer ceramic lining mitre elbow and a manufacturing method thereof. The manufacturing method comprises the following specific steps: 1, rolling a steel plate mesh with rhombic holes, honeycomb hexagonal holes and the like into a barrel shape, and spot-welding the steel plate mesh on the inner surface of a straight steel pipe; 2, coating an alloy coating and a first ceramic coating through a centrifugal self-propagating process; 3, a mitre elbow structure is formed through cutting and welding; 4, coating a second layer of ceramic by adopting a static self-propagating process; and 5, processing a joint welded with the straight pipe to form a transition slope. In the process, ceramic coating gaps in the pipe generated by tailor welding are filled with static self-propagating reaction products. The total thickness of the ceramic layer of the elbow is 2-3.0 times that of a straight pipe, and the inner surface roughness Ra is smaller than or equal to 1.6 microns. The problem that the service life of an elbow is not matched with that of a straight pipe is effectively solved, the abrasion resistance is improved by 3.2-3.8 times, the impact strength is improved to 42 J / cm < 2 >, the equal-life design of a pipeline system can be achieved, and the cost of the whole cycle is reduced by 52% or above.

The invention relates to the technical field of water conservancy projects, and discloses a steel sheet pile connecting structure and an ecological revetment. According to the steel sheet pile connecting structure, the thickening layer of the plain concrete cushion layer is arranged at the connecting position of the steel sheet pile and the bearing platform, and the exposed metal area formed in the welding process is completely wrapped inside, so that the exposed metal area formed due to high-temperature damage in the welding process is not directly exposed to seawater or a high-corrosion environment; corrosion media (water, chloride ions and oxygen) are prevented from being in contact with the metal surface, invasion of the corrosion media is avoided, and a corrosion starting point is eliminated. Meanwhile, according to the structural design, post-welding supplementary coating treatment is not needed, the construction cost is remarkably reduced, the construction period is remarkably shortened, the problem of secondary corrosion prevention failure caused by mismatching of adhesive force and durability in a traditional supplementary coating process is solved, and continuity and integrity of the corrosion prevention performance of the connecting part are ensured.

This invention discloses a post-weld heat treatment process to improve the strength and toughness of welded joints made of 1600MPa grade ultra-high strength steel. The core technology utilizes a composite heat treatment of "precision quenching + low-temperature tempering" to solve the problem of strength-toughness mismatch caused by elemental segregation and uneven microstructure in the welded joint. The process involves oil quenching at 840-850℃ for 5.4-5.8 hours, followed by oil cooling at 200-220℃ for 7.4-7.8 hours. This effectively reduces the segregation of Cr, Mo, W, and Si elements, transforming the weld microstructure from martensite to tempered martensite and precipitating uniform carbides. After treatment with this invention, the tensile strength of both the base metal and the weld joint is ≥1740MPa, the impact energy of the weld joint is increased to over 34J, the impact energy of the base metal reaches over 69J, and the uniformity of hardness distribution is improved by 40%. This process is suitable for welded components made of 1600MPa grade ultra-high strength steel in the automotive, aerospace, and other fields, significantly improving service safety and lifespan.

The application belongs to the field of civil engineering and specifically relates to a negative Poisson's ratio composite steel plate shear wall, which comprises a negative Poisson's ratio component and an edge component; the negative Poisson's ratio component comprises a sandwich layer arranged in the middle and outer steel plates arranged on both sides of the sandwich layer respectively; the outer steel plates are connected with the edge component, the sandwich layer is arranged inside the edge component, and the sandwich layer is connected with the outer steel plates; the outer steel plates and the sandwich layer both have a negative Poisson's ratio configuration. Compared with the prior art, the application solves the defect that the blast resistance and the seismic resistance of the steel plate shear wall do not match in the prior art, optimizes and improves the steel plate shear wall, a typical steel structure component, based on the design concept of the negative Poisson's ratio metamaterial, and provides a new type of negative Poisson's ratio composite steel plate shear wall, which realizes the seismic resistance and the blast resistance of the SPSW and basically realizes the goal of overall coordination of the structural performance requirements under the actions of two disasters.

The invention relates to the field of ceramic materials, and discloses a ceramic-metal material composite brazing method with an in-situ synthesis reaction, which comprises the following steps: pretreating a ceramic surface and a metal surface to be welded; brazing filler metal is preset between the welding faces of the to-be-welded ceramic and the to-be-welded metal, and the brazing filler metal is AgCuTi welding flux added with amorphous boron powder; in the vacuum brazing process, the Ti element and boron powder are subjected to an in-situ reaction, and a TiB ceramic reinforced phase is generated. The technical problem of joint cracking caused by low interface bonding strength and mismatched thermal expansion coefficients in traditional ceramic-metal connection is solved. According to the method, the mixed powder intermediate layer containing the active elements is preset on the to-be-connected interface of the ceramic and the metal, the intermediate layer is induced to be subjected to the in-situ chemical reaction through heating, the composite reaction product with high strength and gradient thermal expansion performance is generated, and metallurgical bonding and stress buffering integration of the ceramic and the metal is achieved; the mechanical property and the service stability of the joint are obviously improved.

The application discloses a production process optimization method and system for a photovoltaic module, and relates to the technical field of photovoltaic production. The method comprises the following steps: front welding is performed on a target photovoltaic module, an infrared thermal image is used to monitor the thermal distribution of a welding head and a welding seam area, and a welding seam peak temperature distribution is obtained by analysis; the weldability of a plurality of tail ends after front welding is identified according to a preset index, and a tail end weldability distribution is obtained; based on the welding seam peak temperature distribution and the tail end weldability distribution, back stringing is positioned, compensated and matched with a secondary reflow heat curve, and a back stringing process optimization scheme is formed; and the back stringing is completed according to the scheme. The technical problems of unstable back stringing quality and electrical performance loss caused by the mismatch of front welding and back stringing process parameters are solved, the technical effect of realizing accurate positioning and heat process matching of back stringing through the data linkage of welding heat distribution and tail end weldability is achieved, and the stringing quality and the component yield are improved.

The invention relates to the field of GTAW welding, in particular to an aluminum alloy GTAW imitation welder welding speed control system and method based on multiple perception. The aluminum alloy GTAW imitation welder welding speed control system and method based on multiple perceptions are provided for solving the problems that the welding seam forming quality is unstable and adjustment depends on artificial experience due to the fact that the welding speed is not matched with the dynamically-changing welding state. A GTAW robot is used for welding; a visual sensor is used for shooting molten pool boundary and molten pool rear images; capturing the three-dimensional shape of the molten pool by using a three-line structure light sensor; beveled edge width information is obtained in real time through a single-line structured light sensor; detecting arc sound by using a sound sensor; and the industrial personal computer analyzes and processes the obtained data. On the basis of accurate analysis of dynamic characteristics of the molten pool, control over welding seam quality forming is finally achieved.

The invention belongs to the technical field of negative pressure dust suppression, and discloses a slag discharge port negative pressure dust suppression device which comprises a negative pressure shell, and a sealing partition plate is fixedly mounted in the middle of the negative pressure shell. The dust filtering bag can be kept in a tight state in a supporting mode, the situation that the filtering effect is affected due to looseness is avoided, the height of each set of air guide barrels can be adjusted by using the lifting adjusting movable frame, the supporting rod is driven to rotate by adjusting rotation through the adjusting screw rod, and the fixing block cannot continue blocking after making contact with the welding rod; meanwhile, the supporting rod cannot continue to rotate, the supporting rod can be driven to move downwards by continuously rotating the opening adjusting knob again, the dust filtering bag can be pushed through the supporting hole disc at the bottom, and the problem that the filtering effect is affected due to loosening and deformation caused by mismatching of the keel and the dust filtering bag can be effectively solved through the mode.

The invention discloses a thick and thin film double-cap resistor assembly capable of avoiding welding spot breakage and a double-cap resistor body, and relates to the technical field of electronic components, the thick and thin film double-cap resistor assembly comprises a thick film resistor body and a thin film resistor body, the thick film resistor body and the thin film resistor body form a composite body, and the composite body is arranged on the topmost layer of a whole module; as a whole, the flexible metal transition layer adopts a snakelike metal foil structure, and stress generated by mismatching of thermal expansion coefficients between the ceramic substrate and the metal cap can be effectively absorbed and released through elastic deformation of the flexible metal transition layer in the thermal cycle process. Secondly, through the synergistic effect of the tree-shaped fractal micro-channel and the functional gradient capillary core, the phase change working medium is utilized and combined with the magnetic fluid working medium and an external magnetic field, active heat management distributed according to needs is achieved, and generation of heat stress is reduced from the source. Through the cooperation mechanism of stress buffering, efficient heat dissipation, namely intelligent monitoring, the problem of welding spot breakage is thoroughly solved, the power density of the resistor is remarkably improved, the service life of the resistor is remarkably prolonged, and the safety and reliability of the resistor under different working conditions are remarkably improved.

The application discloses a preparation method of H13 rolling roller for hot-rolled steel ball, which comprises the following steps: S1, molten steel smelting and electroslag remelting; S2, high-temperature diffusion annealing: high-temperature diffusion annealing is conducted on the electroslag steel ingot to eliminate the as-cast dendritic segregation and homogenize the organization composition; S3, multi-directional forging; S4, post-forging heat treatment and spheroidizing annealing; S5, rough machining and flaw detection; S6, vacuum quenching; S7, instant deep cooling treatment; S8, three times of gradient tempering; S9, fine machining and surface treatment. Through multi-directional cross forging, the application solves the problem of rolling roller fracture failure; instant deep cooling treatment within 2 hours after quenching improves the organization stability; through three times of differential gradient tempering, the problem of mismatching between the strength and toughness of the roller body and the roller neck is solved; through rare earth composite slag system electroslag remelting, the purity of the molten steel is improved, and the crack sensitivity is reduced; the whole-process process synergistically improves the service life of the rolling roller and reduces the production cost.

The invention relates to the field of GTAW welding, in particular to a GTAW shielding gas intelligent control system and method based on multi-sensor cooperative sensing. In order to solve the problems that in the GTAW welding process, the shielding gas range and the gas flow speed are not matched with actual welding, and gas flow deviates, the GTAW shielding gas intelligent control system and method based on multi-sensor collaborative sensing are provided. Real-time adjustment of the diameter of the nozzle is achieved through the variable-diameter nozzle of the variable-diameter nozzle GTAW welding gun; the direction track of the nozzle is controlled through a GTAW nozzle direction track control method based on structured light vision sensing; the size of the nozzle is controlled through a nozzle size control method based on the self-adaptive molten pool area; an argon flow closed-loop control method based on gas flow sensing is used for controlling the flow of argon; and controlling the angle of the nozzle by using a GTAW nozzle angle self-adaptive control method.

The invention discloses an intelligent welding system and method applied to a profile steel structural part, and belongs to the technical field of welding manufacturing. The system comprises a three-dimensional scanning and sensing subsystem used for obtaining the actual three-dimensional point cloud of a groove to be welded; the central control and digital twin subsystem is used for comparing the actual point cloud with the theoretical model and optimizing and generating a welding path and parameters; the welding execution and monitoring subsystem is used for executing welding and collecting process data in real time; and the quality evaluation and early warning subsystem is used for carrying out online quality evaluation and early warning through a machine learning model based on the process data. The problems of path deviation, parameter mismatching, quality detection lag and the like caused by assembly errors in profile steel welding are solved, full-process intelligent welding from sensing to decision making to evaluation is achieved, and the welding quality and the production efficiency are remarkably improved.

The utility model belongs to the technical field of machine manufacturing, and discloses a shaft forging with an end adjusting structure, which comprises a shaft body, the end adjusting structure and a locking device, the end adjusting structure comprises an adjustable sleeve and an adjusting thread, and the adjustable sleeve is connected with the shaft body through the adjusting thread. The shaft type forge piece end adjusting device is suitable for installation of new equipment and can also be used for maintenance and transformation of existing equipment, the universality and adaptability of shaft type forge pieces are remarkably improved, the end size of the shaft type forge pieces can be adjusted in real time in the installation process through the end adjusting structure, and the installation efficiency is improved. The problem of mismatching caused by machining errors or assembly errors is eliminated, so that the installation precision is improved, the end adjusting structure is mainly composed of an adjustable sleeve, an adjusting thread and a locking device, the structure is compact, manufacturing and installation are easy, fine thread design is adopted for the adjusting thread, and the adjusting precision is high; the locking device ensures that the adjusted position is fixed and reliable, and looseness is prevented.

The invention discloses a packaging structure capable of preventing warping and a packaging method.The packaging structure comprises a chip carrier plate, a buffer lining plate and a circuit substrate which are sequentially arranged from top to bottom, the buffer lining plate comprises a flexible plate body, a plurality of welding units are arranged on the flexible plate body at intervals, and each welding unit comprises a top bonding pad, a bottom bonding pad and a first connecting line; the top bonding pad and the bottom bonding pad are sequentially arranged on the top surface and the bottom surface of the flexible board body; each first connecting line is located on the bottom surface of the flexible board body and is used for connecting the corresponding top bonding pad and bottom bonding pad; the upper surface of each top bonding pad is connected with the chip carrier plate, and the lower surface of each bottom bonding pad is connected with the circuit substrate; the flexible board body is provided with first through holes which are in one-to-one correspondence with the top bonding pads and second through holes which are in one-to-one correspondence with the bottom bonding pads, the top bonding pads are connected with the flexible board body through the first through holes, the bottom bonding pads are connected with the flexible board body through the second through holes, the packaging method comprises the packaging structure, and the problem of CTE mismatching between materials can be solved.