21119 results about "Steel plates" patented technology

The invention provides a color steel plate coating thickness dynamic monitoring method and system based on artificial intelligence. According to the method, the temperature distribution data of the surface of the color steel plate coating is obtained, the thermal response map is generated in a pulsed eddy current excitation mode, then the temperature distribution data and the thermal response map are subjected to time sequence correlation processing, the heat conduction characteristics are extracted, and then the heat conduction characteristics are synchronously analyzed; color steel plate coating defect types and thickness abnormal grades are distinguished through a dynamic weight distribution mechanism, a detection result containing defect positions, sizes and thickness deviation values is generated, and finally a coating thickness dynamic compensation instruction is generated according to the detection result; according to the technical scheme provided by the invention, the online control precision and the production efficiency of the coating quality are remarkably improved, and a closed-loop feedback system from detection to control is formed.

The invention provides a color steel plate coating flatness evaluation method and system based on artificial intelligence. According to the method, the three-dimensional point cloud data is generated by collecting the interference fringe image, and the surface fluctuation characteristics are quantified; capturing a multi-dimensional vibration spectrum of the transmission roller shaft, generating a servo motor compensation control signal, driving a multispectral scanning head to perform reverse displacement compensation, and generating real-time compensation data; inputting the surface topography features in the three-dimensional point cloud and the real-time compensation data into a lightweight convolutional neural network, and outputting fusion features; and dynamically classifying and identifying surface defects and uneven areas based on the fusion result, adjusting a classification threshold in combination with the speed of the production line, outputting a flatness evaluation result, and synchronizing the flatness evaluation result to a speed regulation system of the production line to realize closed-loop optimization. According to the method, laser interference, vibration compensation and lightweight AI technologies are fused, dynamic high-precision evaluation of the surface flatness of the color steel plate of the high-speed production line is achieved, and the problems of defect misjudgment and measurement distortion caused by vibration interference are solved.

The invention provides a cold-rolled strip steel plate shape closed-loop control method and system based on dynamic feedback, and belongs to the technical field of cold-rolled strip steel production.The method comprises the steps that a dynamic incidence matrix and a plate shape deviation signal are generated based on cold-rolled strip steel transverse measuring point data, processing the dynamic incidence matrix to obtain a space correlation defect feature vector of the cold-rolled strip steel, and processing the strip shape deviation signal to obtain a multi-dimensional defect feature vector; determining the strip shape defect type of the cold-rolled strip steel based on the multi-dimensional defect feature vector and the space correlation defect feature vector; and strip steel production control parameters are adjusted based on the strip shape defect type. The plate shape quality stability of the cold-rolled strip steel can be improved.

The invention belongs to the field of metal materials, and particularly relates to a high-strength hot-rolled pickled steel plate for an automobile chassis and a production method thereof. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the following chemical components: C, Si, Mn, Al, V, Ni, Cu, Cr, Pt and Y, P is limited to be less than or equal to 0.015%, S is limited to be less than or equal to 0.005%, N is limited to be less than or equal to 0.006%, and the balance is Fe and inevitable impurities. The yield strength of the steel plate ranges from 498 MPa to 552 MPa, the tensile strength ranges from 608 MPa to 643 MPa, the transverse elongation A ranges from 33% to 38%, the steel plate is qualified after transverse cold bending by 180 degrees D = a, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra ranges from 1.10 micrometers to 1.35 micrometers, and the steel plate has excellent corrosion resistance.

The invention discloses a color-coated steel plate weather resistance evaluation method based on multi-source data fusion, and relates to the technical field of color-coated steel plate weather resistance evaluation. The method comprises the following steps: acquiring color-coated steel plate data based on Internet of Things sensing equipment and preprocessing the color-coated steel plate data; in an experimental environment, performing subitem weather resistance evaluation based on the preprocessed data of the color-coated steel plate, and determining a weather resistance evaluation grade of each subitem; if the weather resistance evaluation grades of all the sub-items are qualified, comprehensive weather resistance evaluation is conducted on the color-coated steel plate based on different simulated use environments, the risk grade of the color-coated steel plate in the simulated use environment after the weather resistance evaluation of the sub-items is determined, and multi-dimensional data are obtained through Internet of Things sensing equipment and fused and analyzed; practical accurate evaluation and comprehensive risk judgment of the appearance, the corrosion resistance and the mechanical property of the coating are achieved, and the problems that in an existing evaluation method, due to a single data source, the evaluation result is one-sided, and the weather resistance of the color-coated steel plate in the complex environment cannot be comprehensively reflected are solved.

A double cold rolled non-oriented electrical steel sheet having a composition including: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.2%, 3.1%≤Silicon≤3.6%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, is from 35% to 45% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.64 T to 1.66 T.

The present invention relates to the technical field of steel plate production, and particularly to a thick steel plate for high-strength storage tanks with a low ductile-brittle transition temperature and a preparation method thereof. The chemical components in the steel are as follows: C: 0.22% - 0.26%, Si: 0.13% - 0.144%, Mn: 0.73% - 0.92%, P≤0.015%, S≤0.01%, Cr: 0.03% - 0.049%, V: 0.01% - 0.019%, Nd: 0.00016% - 0.00047%, and the balance is Fe and impurities. Microalloying is used to ensure the excellent internal structure and service performance of the steel plate; the purity of the molten steel is improved by optimizing the smelting process; the internal structure of the steel plate is optimized and the plate shape is improved by adopting a four-stage slab heating process and a three-stage controlled rolling process; the simulated post-weld heat treatment process is used to improve the strength-ductility matching and adjust the microstructure of the material, ensuring the low-temperature service performance of the steel plate in the full thickness direction.

The invention belongs to the field of metal materials, and particularly relates to a 448 MPa grade hot-rolled pickled steel plate for an automobile and a production method of the 448 MPa grade hot-rolled pickled steel plate. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the following chemical components: C, Si, Mn, Al, Nb, Ta, Zr and Y, P is limited to be less than or equal to 0.015%, S is limited to be less than or equal to 0.005%, N is limited to be less than or equal to 0.003%, and the balance is Fe and inevitable impurities. The yield strength of the steel plate is larger than or equal to 308 MPa, the tensile strength is larger than or equal to 448 MPa, the transverse elongation A is larger than or equal to 42%, the hole expansion rate is larger than or equal to 125%, transverse cold bending is conducted by 180 degrees, D = a, the steel plate is qualified, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra is 1.00-1.40 micrometers, and the steel plate has good corrosion resistance.

A double cold rolled non-oriented electrical steel sheet having a composition including, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.3%, 3.2%≤Silicon≤3.8%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 30% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66 T to 1.69 T.

This invention discloses a process for controlling the shape of A514GrQ extra-thick plates for offshore platforms. It uses 800-1000mm thick steel ingots, and after removing and cleaning the ingot risers, ensures uniform thickness of the ingot body, laying the foundation for obtaining steel plates with excellent flatness. The heating process is optimized to ensure uniform heating of the ingot head, middle, and tail, facilitating uniform deformation during rolling. Homogenized rolling is employed to reduce cooling water usage, limit the reduction per pass, and control the final rolling temperature, avoiding uneven internal stress and shape rebound in the steel plate. The final product is a 180-210mm thick steel plate with a maximum flatness ≤8mm and a lateral flatness ≤4mm within a length of 10000mm and a width of 2400mm, significantly reducing subsequent leveling tasks.

The invention relates to the technical field of bridge steel plate welding, and discloses bridge steel plate welding equipment facilitating feeding and discharging, feeding and discharging conveying mechanisms are arranged on welding table bodies, alignment mechanisms are arranged on the welding table bodies, and a sliding rail structure is arranged between the two welding table bodies; two sets of fixing mechanisms with lifting functions are arranged at the lower end of the sliding track structure, a welding mechanism is arranged on the inner side of the sliding track structure, a tensioning assembly is arranged on the upper portion of the welding mechanism, and a driving assembly is arranged on the connecting face of the welding mechanism and the track. According to the welding device, plates can be welded through the plasma welding gun, driving wheels in the driving assembly can enable the welding mechanism to move along the sliding rail structure, so that thick steel plates such as bridge steel plates are welded, the vertical position of the welding gun can be adjusted through the fixing mechanism and the lower rotating cylinder, and the welding effect is improved.

The invention discloses preheating-free welding maritime work steel with excellent low-temperature toughness and a preparation method of the preheating-free welding maritime work steel, and belongs to the field of steel and iron material preparation. The produced steel plate has good comprehensive mechanical properties through alloy component-secondary rolling-controlled cooling process coupling design, the problem that the strength, plasticity, low-temperature toughness and preheating-free post-welding performance of the steel plate are difficult to match and harmonize is solved, the steel plate has ultrahigh-strength plasticity, excellent low-temperature toughness and excellent Z-direction performance, and room-temperature preheating-free welding can be achieved.

The invention discloses a ship steel plate digital cutting and typesetting optimization method and system, and the method comprises the steps: collecting the morphology data of a to-be-cut steel plate, and generating a machining region model; based on the machining area model and the specification data of the target part, a deep reinforcement learning-genetic hybrid algorithm is adopted as a solving strategy, and an optimal typesetting scheme is output; generating a numerical control cutting path and a corresponding numerical control code according to the preferable typesetting scheme, and carrying out kerf gap constraint and thermal deformation compensation on the numerical control cutting path; based on the deviation between the ideal coordinates of the reference mark points in the machining area and the real coordinates of the reference mark points projected on the to-be-cut steel plate, the to-be-cut steel plate is positioned and calibrated; and executing a cutting instruction, evaluating a cutting result, and feeding back deviation data to adjust and optimize strategy parameters. On the premise of ensuring the process feasibility, limit utilization of the steel plate is achieved, the cost is reduced, the cutting quality is improved, and the method is suitable for shipbuilding scenes with various complex parts and high cutting precision requirements.

A double cold rolled non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.3%, 3.1%≤Silicon≤3.8%, 0.6%≤Aluminum≤0.8%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition is iron and unavoidable impurities caused by processing. The microstructure ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, of 40 to 50% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66T to 1.7T.

An automotive body side structure includes: a side sill extending in a vehicle length direction; a battery pack disposed vehicle inside in a vehicle width direction relative to the side sill; and a collision energy absorptive part having a substantially U-shaped cross section, the substantially U-shaped cross section including: a bottom portion substantially parallel to a vehicle height direction; and a pair of side wall portions continuous from an upper end and a lower end of the bottom portion. The collision energy absorptive part is provided in a protruding shape toward vehicle outside in the vehicle width direction on an outer peripheral side in the vehicle width direction of the battery pack facing the side sill. The collision energy absorptive part is made of a steel sheet having a tensile strength of 270 MPa-class to 340 MPa-class and a plate thickness of 1.0 mm to 1.4 mm.

The invention belongs to the field of metal materials, and particularly relates to high-elongation and high-forming passenger car steel and a production method thereof.The steel plate is mainly suitable for manufacturing passenger car structural parts, the steel comprises the following chemical components of C, Si, Mn, Al, V, Ta, Bi, Sb, Ni, Pt and Y, P is limited to be smaller than or equal to 0.015%, S is limited to be smaller than or equal to 0.005%, N is limited to be smaller than or equal to 0.006%, and the balance Fe and inevitable impurities. The steel plate is obtained by adopting hot rolling, EPS, continuous annealing and finishing processes, the processes of pickling and cold rolling are reduced, the production process is simplified, the production cost is reduced, and the environment is not polluted.

The present invention provides: a steel sheet which contains Ni, Cu and Sn, and has excellent chemical conversion treatability; and a component which includes said steel sheet.　A steel sheet and a component including the same according to the present invention are characterized by having a chemical composition containing, in mass %, 0.010-1.000% of Ni, 0.010-1.000% of Cu, and 0.003-1.000% of Sn, and by the emission intensities of Ni, Cu, and Sn in the surface layer of the steel sheet as measured by high-frequency glow discharge optical emission spectrometry satisfying the following relationships.　Ni: Surface layer maximum intensity / Bulk intensity ≤ 1.5 Cu: Surface layer maximum intensity / Bulk intensity ≤ 1.3 Sn: Surface layer maximum intensity / Bulk intensity ≤ 15

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.25%, 3.2%≤Silicon≤3.8%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and various optional elements. The remainder composition is iron and unavoidable impurities caused by processing. The microstructure is ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 33% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.630T to 1.65T.

The invention discloses a galvanized steel sheet blanking and shearing device and a working method thereof, and relates to the technical field of shearing devices. According to the galvanized steel sheet blanking and shearing device and the working method thereof, the galvanized steel sheet blanking and shearing device comprises a shearing machine main body, a lower shearing knife arranged on the shearing machine main body and an upper shearing knife vertically arranged on the shearing machine main body, a dynamic material supporting mechanism is arranged on the shearing machine main body, and the dynamic material supporting mechanism comprises a first rotating seat and a second rotating seat, and the two first rotating seats are arranged on the shearing machine main body. Through the design of the dynamic material supporting mechanism, accurate dynamic material supporting of a sheared steel plate is achieved, and the problems of shearing opening size deviation, stress concentration and the like caused by the fact that the steel plate droops due to gravity in the existing shearing process are solved; the material supporting assembly synchronously ascends at the moment of shearing, it is ensured that the steel plate is supported in time, and falling deformation or impact on equipment is avoided.

The invention belongs to the field of metal materials, and particularly relates to high-formability steel for a passenger car and a production method of the high-formability steel, the steel plate is mainly suitable for manufacturing passenger car structural parts, the steel comprises the following chemical components: C, Si, Mn, Al, Ti, Ta, Bi, Sb, Ni, Pt and Y, P is limited to be less than or equal to 0.015%, S is limited to be less than or equal to 0.005%, N is limited to be less than or equal to 0.003%, and the balance is Fe and inevitable impurities. The steel plate is obtained by adopting hot rolling, EPS, continuous annealing and finishing processes, the processes of acid pickling and cold rolling are reduced, the production process is simplified, and the environment is not polluted.

The invention belongs to the field of metal materials, and particularly relates to a high-elongation 288MPa-grade hot-rolled pickled steel plate for an automobile and a production method thereof. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the chemical components of C, Si, Mn, Al, Ti, Zr, Ni, Pt and Y, P is limited to be smaller than or equal to 0.015%, S is limited to be smaller than or equal to 0.005%, N is limited to be smaller than or equal to 0.003%, and the balance is Fe and inevitable impurities. The steel plate has excellent mechanical properties, the yield strength of the steel plate is larger than or equal to 238 MPa, the tensile strength is larger than or equal to 288 MPa, the transverse elongation A is larger than or equal to 48%, the hole expansion rate is larger than or equal to 132%, transverse cold bending is conducted by 180 degrees, D = a, the steel plate is qualified, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra is 1.08-1.48 micrometers, and the steel plate has good corrosion resistance.

The invention discloses a production method of thick-wall pipeline steel X65MS for polar regions, which adopts ultra-low carbon and high Ni + casting blank secondary cogging extreme cooling + steel plate online ultrafast cooling, breaks the component design of the conventional pipeline steel standard, solves the problem of poor drop hammer low-temperature toughness of thick-wall acid-resistant pipeline steel at-55 DEG C, and has the transverse and longitudinal yield strength of 460-560MPa, the tensile strength of 590-650MPa, the yield ratio of less than or equal to 0.80, the tensile strength of 590-650MPa and the tensile strength of less than or equal to 0.80. The uniform elongation is 10%-12%, the impact value at-55 DEG C is 400-500 J, and the drop weight at-55 DEG C is 90%-95%; when the product is soaked in an NACE solution for 96 hours in an HIC test, CLR, CTR and CSR are all 0; sSC test: four-point bending constant load nominal yield is 90%, and the sample is soaked for 720 hours, and the surface of the sample has no crack; the CTOD value of the crack tip opening displacement of the CTOD test material at-55 DEG C is greater than or equal to 0.6 mm.

The invention discloses a shield tunnel connection channel portal construction method based on mechanical excavation, and relates to the technical field of shield tunnel connection channel construction, and the shield tunnel connection channel portal construction method comprises the steps that a steel sleeve is installed at a connection channel portal, and portal sealing is achieved; a glass fiber reinforced concrete pipe piece is pre-buried in the opening of the connection channel, and based on the multi-stage construction strategy, the pipe jacking machine entering and exiting construction task is executed in sequence; prefabricated jacking pipe joints are adopted for channel tunneling and splicing, the size parameters of the jacking pipe joints meet the fireproof evacuation function requirement, and the jacking pipe joints are spliced in a staggered joint mode without wedge-shaped quantity; steel jacking pipe joints are arranged at the head end and the tail end of the connecting channel, and arc-shaped steel plates are pre-buried; and in the T-joint section where the transverse channel and the main tunnel intersect, an arc-shaped steel plate is adopted for welding a tunnel portal connector, and an emergency grouting pipe is arranged on the arc-shaped steel plate, so that end-dividing grouting reinforcement is achieved. Reference is provided for shield tunnel connection channel mechanical method portal construction, the structural strength of a holing area is effectively improved, and the operation stability is improved.

A steel sheet has a chemical composition including in wt % C: 0.2-0.4%, Mn: 0.8-2.0%, Si: 0.1-0.5%, Al: 0.01-0.1%, Ti: 0.01-0.1%, B: 0.0005-0.005%, P≤0.040%, Ca≤0.01%, S≤0.006%, N≤0.01%. The steel sheet includes from the bulk to the surface of the coated steel sheet a bulk and a skin layer occupying the outermost 10% of the thickness on either side of the bulk. The bulk includes an inclusion population in which the sum of clustering indexes of MnS and TiN / Ti(C,N) inclusions is less than or equal to 300 μm / mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending anisotropy equal to or lower than 7°.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.21%≤Manganese≤0.7%, 3%≤Silicon≤3.6%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and can contain various optional elements. The remainder composition being composed of iron and unavoidable impurities. The microstructure is ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, from 35% to 45% and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.63T to 1.66T.

The invention relates to a P690QL2 steel plate with ultrahigh die welding and low-temperature performance and a manufacturing method of the P690QL2 steel plate. The P690QL2 steel plate comprises the following chemical components in percentage by weight: 0.04%-0.12% of C, 0.02%-0.08% of Si, 1.0%-1.2% of Mn, 1.5%-2.5% of Ni, 0.3%-0.7% of Cr, 0.7%-0.9% of Mo, 0.07%-0.12% of V, 0.02%-0.04% of Ti, less than or equal to 0.002% of S, less than or equal to 0.002% of P, 0.03%-0.06% of Als and the balance of Fe and inevitable impurity elements. The steel plate is applied to the liquid cargo tank of the LCO2 transport ship, has high strength and low-temperature toughness requirements, is easy to weld and has ultrahigh die welding performance, the V-type impact energy of the steel plate at-60 DEG C is larger than or equal to 150 J, the CTOD at-55 DEG C is larger than 0.2 mm, and the machining and welding use requirements of pressure-bearing equipment are met.

The invention relates to the technical field of steel plate hot-dip production, and discloses an intelligent scheduling system for a steel plate hot-dip production process. The system comprises a working condition sensing module which is used for continuously collecting steel belt inlet temperature, zinc liquid component concentration fluctuation data, air knife pressure time sequence parameters and roller system operation state signals of a galvanizing pot area; the feature extraction module receives the working condition data flow, analyzes the steel strip surface temperature field distribution features and the zinc liquid viscosity change rule, and generates a process feature spectrum; the parameter optimization module dynamically adjusts membership function parameters and rule base weight coefficients of the fuzzy reinforcement learning controller according to the process characteristic spectrum, and outputs an optimized plating layer control parameter set; the self-adaptive plating layer control module generates a plating layer thickness control instruction based on the real-time zinc liquid temperature parameter and the optimized plating layer control rule set; and the dynamic roller system scheduling module realizes global cooperative control of the roller system speed based on the instruction. The system can realize intelligent scheduling of the steel plate hot-dip production process.

The invention belongs to the technical field of steel sheet piles, and discloses a steel sheet pile for compensating stratum loss during pile pulling and a construction method.The steel sheet pile comprises a plurality of steel sheet pile units, and each steel sheet pile unit comprises a plurality of steel sheet piles; the foundation pit sides of the steel sheet pile units are connected with a plurality of compensation bags, and grouting systems are arranged on the foundation pit sides of the compensation bags. The foundation pit side of the steel sheet pile is coated with viscous grease, the side, facing the steel sheet pile, of the compensation bag is coated with pressure-sensitive adhesive, and the compensation bag is temporarily connected with the steel sheet pile; the grouting system comprises a main grouting pipe, the bottom of the main grouting pipe is connected with a horizontal grouting pipe, the side, facing the steel sheet pile, of the horizontal grouting pipe is connected with a plurality of flow dividing pipes, and the flow dividing pipes correspond to the compensation bags. A vertical branch pipe is upwards separated from the middle position of the flow dividing pipe, and is connected with a grouting connector at the bottom end of the corresponding compensation bag; the tail end of the flow dividing pipe is downwards divided into an inclined grouting pipeline, and the inclined grouting pipeline faces the lower portion of the steel sheet pile. The technical problem that filling is not timely due to the fact that grouting pipes are installed to fill gaps after steel sheet piles are pulled out in the prior art is solved.

The invention provides a dark crack detection method of an ultrahigh-strength steel plate stamping part for a new energy automobile, and relates to the technical field of stamping part detection, and the dark crack detection method comprises the following steps: obtaining a detection area and a reference area of a to-be-detected stamping part; injecting a group of same multi-frequency alternating-current excitation signals into the detection area and the reference area of the to-be-detected stamping part at the same time, and synchronously acquiring a first electrical response signal of the detection area under the multi-frequency alternating-current excitation signals and a second electrical response signal of the reference area under the multi-frequency alternating-current excitation signals; based on the first electrical response signal and the second electrical response signal, calculating a conductivity difference value of the detection area and the reference area at the same frequency point, and obtaining a conductivity difference value-frequency curve comprising a plurality of frequency points; and based on the conductivity difference-frequency curve, whether dark cracks exist in the detection area is judged. According to the detection method, the defect degree can be quantitatively evaluated, and the strict requirement of the new energy automobile industry for quality consistency is met.

The invention discloses a steel structure bridge welding device and method, and relates to the technical field of steel structure welding, the steel structure bridge welding device comprises a welding main body and a moving assembly for moving the welding device; the hoisting assembly is used for clamping and moving the U-shaped rib plate; the unloading assembly is used for unloading the welded bridge deck steel plate; the pushing assembly is used for pushing the welding device to move; the adjusting assembly is used for adjusting the angle of the welding device. A double-sided toothed plate is pushed through an electric telescopic rod, a telescopic plate is pushed through a linkage gear, the position of a storage box is adjusted, the output end of a welding gun is aligned with the welding face of a U rib and a bridge deck slab, then an electric telescopic frame is started, the joint of the U rib and the outer wall of the bridge deck slab is welded, and the problem that a traditional steel structure bridge welding device is inconvenient to use when used is further solved. And due to the fact that the limitation of a device for welding the U-shaped rib plate and the inner wall of the bridge deck steel plate is large, an additional device is needed for cooperation subsequently, and the problem that the U-shaped rib plate and the surface of the bridge deck steel plate are welded is solved.