1353 results about "Thick plate" patented technology

The invention discloses a thick plate welding residual stress numerical prediction method based on heat-fluid-solid multi-field coupling, which combines computational fluid dynamics with a finite element method, and comprehensively considers the flow characteristic and thermodynamic effect of liquid metal. In the CFD, the influence of metal melting, molten pool flowing, surface tension, buoyancy, heat transfer and fluid flowing on the geometric shape and temperature distribution of the weld joint is simulated, in the FEM module, the geometric shape and temperature difference of the weld joint are calculated based on the CFD, residual stress and deformation are further simulated and analyzed in combination with a life-death unit technology, and through the FEM module, the residual stress and deformation of the weld joint are obtained. The forming mechanism of the convex welding seam, the evolution rule of the thick plate welding residual stress and the influence of the geometrical shape on residual stress concentration are systematically researched.

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 discloses a weld joint three-dimensional structure detection device based on vortex laser, and relates to the field of laser welding, and the weld joint three-dimensional structure detection device comprises a vortex laser generation system used for generating and emitting vortex laser; the image acquisition unit is used for collecting returned laser data projected to the welding seam and carrying out dynamic scanning and data acquisition; the motion control and feedback system is used for adjusting the relative position of the laser welding head and the workpiece in real time and dynamically adjusting parameters such as welding power and scanning speed according to the collected data result; and the data processing and analyzing platform is used for carrying out image processing and feature extraction on the collected multi-dimensional data and modeling the morphology of the welding sample. The vortex laser serves as a light source for welding seam detection, high-precision, high-depth, multi-parameter and strong-interference-resistance three-dimensional welding seam modeling is achieved, the problems that in the long and thick plate welding process, welding seam detection parameters are few, precision is low, and real-time adjustment cannot be achieved are solved, and meanwhile the device has the performance characteristics of being high in detection precision, high in efficiency and comprehensive in structural parameter.

The invention relates to the technical field of welding, in particular to a double-laser double-swing auxiliary MIG electric arc thick plate narrow gap welding method and device, and the welding method specifically comprises the following steps that S1, initial positioning is conducted; s2, performing double-laser cross scanning preheating; s3, MIG electric arc auxiliary fusion is conducted, specifically, MIG electric arc is introduced on the basis of a molten pool formed by laser, so that the molten pool is stably combusted under laser induction, the common molten pool effect is achieved, and complete fusion of the side wall and the root of the groove is promoted; s4, real-time monitoring and adjustment in the welding process are conducted, specifically, in the welding process, the state of a molten pool and the welding quality are monitored in real time, and the laser power, the electric arc parameters and the welding speed are dynamically adjusted; and S5, welding seam quality detection. The double-laser-assisted MIG electric arc is used, the stability of the MIG electric arc is remarkably enhanced, the advantage of MIG filling efficiency is brought into play, and the welding efficiency and the welding quality are effectively improved.

The invention discloses an intelligent suspension conveying device for laminated glass production, and relates to the technical field of intelligent suspension conveying devices, the intelligent suspension conveying device comprises a guide rail frame and a plurality of suckers, the guide rail frame is slidably provided with a suspension frame, and the suspension frame is provided with a moving structure for driving the plurality of suckers to move. The device has the advantages that the device has the capacity of adapting to plane glass and curved glass, the adsorption angle and the fitting degree can be adjusted in a self-adaptive mode according to the arc-shaped contours of the laminated glass with different curvatures, the stability in the hanging and conveying process is guaranteed, the damage risk caused by unstable adsorption of a traditional device is avoided, frequent manual setting operation is not needed in the whole process, and the production efficiency is improved. Meanwhile, the adsorption force can be intelligently matched with the thickness of the glass, so that the ultra-thin glass is prevented from being pressed and damaged, the adsorption failure of the thick plate glass is prevented, manual parameter calibration is not needed, manual intervention errors are reduced, and the suspension conveying efficiency is improved.

The invention belongs to the technical field of laser manufacturing and green manufacturing, and discloses an ultrahigh-power laser low-loss repair method for deep defects of a thick plate, which comprises the following steps: identifying the positions, types and three-dimensional shapes of the surface and deep defects (pores and cracks) of the thick plate through a phased array ultrasonic detection module (PAUT); on the basis, a laser space energy distribution repairing path for specific defects is automatically planned; carrying out an ultra-high power laser defect remelting process; finally, whether the surface and the deep part of the thick plate have defects or not is recognized again through the ultrasonic detection module, low-damage repair of the deep part defects of the thick plate is achieved, and the use efficiency and the service life of a repaired part are improved.

The invention discloses narrow-gap swing laser-MIG composite filler wire welding equipment and method for a thick-wall component, belongs to the field of thick-wall component welding, and aims to solve the problems that the side wall of a narrow-gap groove of a thick plate of 50-250 mm is not fused and the welding efficiency is low. The swinging narrow-gap MIG welding gun and the auxiliary wire feeding pipe are arranged on the two sides of the laser, dynamic cooperation of the main / auxiliary double wire feeding systems is adopted, the dynamic characteristics of a molten pool are improved in combination with laser spot swinging, and the deposition efficiency is improved. The heating range of the composite heat source is expanded through the coupling effect of swing laser and electric arc, sufficient fusion of the side wall is ensured, meanwhile, bubble discharging is promoted through molten pool stirring, grains are refined, and the welding seam quality is improved. The laser and the MIG electric arc form a composite energy field, the auxiliary welding wire is directly melted, the energy utilization rate is remarkably improved, the deposition amount in unit time is increased by 30%-50%, the single-layer single-pass welding thickness can reach 3 mm-5 mm, the welding passes are reduced compared with a traditional MIG fuse wire mode, and the method is suitable for efficient and high-quality thick plate welding.

The invention belongs to the technical field of visual identification, and particularly discloses a thick plate weld groove orthogonal section contour three-dimensional point cloud reconstruction method and system. Comprising the following steps: dividing a three-dimensional point cloud of a groove contour into a plurality of parts according to geometric characteristics of a weld groove; receiving designation of a target part, extracting a point cloud subset at the left junction of the target part, and further fitting to obtain an edge line; confirming a point closest to the three-dimensional point cloud of the current frame on the edge line; calculating a tangent vector of the edge line at the nearest point as a normal vector of an orthogonal section; calculating the distance between each point in the three-dimensional point cloud of the current frame and the normal vector of the orthogonal section, and screening out all points which do not exceed a preset threshold value; and calculating a projection point of each screened point on the orthogonal section to jointly form a reconstructed thick plate weld groove orthogonal section contour. According to the method, the coordinate system orthogonally perpendicular to the welding seam in real time is constructed, the three-dimensional point cloud is projected to the orthogonally perpendicular plane, the orthogonal section contour of the groove of the welding seam is obtained, and the measurement error caused by the pose of the sensor is eliminated.

The invention relates to the technical field of titanium alloy rolling processing, and discloses a method for inhibiting surface cracking in the rolling process of a high-strength titanium alloy thick plate, which comprises the following steps: selecting a titanium alloy plate blank, and preheating the plate blank; the preheated plate blank is subjected to surface multi-pass rolling treatment, and the roll gap set in the later-pass rolling treatment is smaller than that in the previous-pass rolling treatment; remelting and heating the plate blank, wherein the heating temperature is higher than the preheating temperature; the plate blank is discharged out of the furnace and subjected to multi-pass rolling, a rolled plate blank is obtained, and the rolling pass rolling reduction is controlled to range from 5 mm to 25 mm; and the rolled plate blank is straightened on line and then air-cooled to the room temperature. According to the method, the surface layer of the plate blank substrate is subjected to structure prefabrication, the surface plasticity is improved, the extensibility in the rolling process is improved, and generation of surface cracks is restrained.

The invention discloses a roll-to-roll cleaning control method and system for a flexible circuit board electronic structural member, and relates to the technical field of electronic manufacturing, and the method comprises the steps: carrying out the partitioning processing of a to-be-cleaned member, and obtaining a thin region and a thick region; the drying cavity is partitioned on the basis of the thin area and the thick area, and a partitioned temperature control method is constructed; a dehumidification drying module is placed, and a hot air drying method is obtained based on a chilled mirror dew-point instrument; the roll-to-roll cleaning control method is used for solving the problems that in an existing roll-to-roll cleaning control method for the flexible circuit board electronic structural part, differential temperature control is not carried out on a thick area and a thin area, and the influence of environment humidity in a drying cavity on the drying effect is not considered; the problems that a thin plate is overheated after being dried, water in a thick plate is not completely evaporated, watermarks which cannot be wiped appear on the surface of the electronic structural part, and then the practicability of the cleaned electronic structural part is affected are solved.

The invention discloses an automatic oil coating system and a working method thereof, relates to the technical field of automatic oil coating, and aims to solve the technical problem that the oil coating effect is affected by unstable clamping of workpieces with different thicknesses, and the automatic oil coating system comprises a cabinet body, a bearing plate, an oil coating mechanical arm, a drying box, an adaptive clamping structure, a pipeline communication assembly, an overturning assembly and a drying assembly. The bending rod is driven to act through gathering of the shell and translation of the push rod, so that the oiling clamping requirements of circular, rectangular and other plate-shaped workpieces are met, wrapping type stable clamping during oiling of a thin plate is achieved, multi-point type lifting clamping during oiling of a thick plate is achieved, and the problems that a traditional structure is single in adaptability, and stable supporting is difficult to guarantee the oiling stability are solved; and meanwhile, by means of the overturning transmission design, right-angle overturning and face overturning needed by oiling can be conducted on the thick plate and the thin plate correspondingly, double-face precise oiling is completed in cooperation with an oiling mechanical arm, the adaptability and efficiency are improved, and the requirement for automatic oiling of diversified plate-shaped workpieces is met.

The invention relates to the technical field of ship manufacturing welding, in particular to a large-wall-thickness Al-Mg alloy laser-MIG composite and friction stir welding coupled welding device and method for ships, and the device comprises a sequential system 1, a friction stir welding module 2 and a laser-MIG composite welding module 3; the laser-MIG composite welding module 3 comprises a laser sensing return device 3A, a welding gun swing control device 3B and a laser-MIG composite welding gun 3C; the laser-MIG composite welding gun 3C comprises an MIG welding gun and a laser welding gun, the MIG welding gun and the laser welding gun are coaxially arranged, an optical fiber laser is arranged in the laser-MIG composite welding gun 3C, the optical fiber laser has the functions of laser visual sensing, preheating and post-heating, and the device solves the contradiction between the penetration depth and the defect when a traditional welding method is adopted for the thick plate aluminum alloy for the ship. Axial force needed during friction stir welding can be reduced through laser preheating, the pressure of a main shaft of equipment is remarkably reduced, and the service life of a stirring head is prolonged.

The invention relates to the field of thick plate H steel welding, in particular to a back-gouging-free full penetration automatic welding method for thick plate H steel, and provides the following scheme aiming at the problems of large welding shrinkage and low welding efficiency during full penetration welding of H steel thick plates in the prior art: the method comprises the following steps: S1, forming single-side 35-degree grooves in two sides of an H steel web; s2, the welding position in the middle of the H-steel flange plate and the groove position of a web plate are polished; s3, according to different thicknesses of the H steel plates, the reversible deformation angle of the flange plate is adjusted; and S4, H steel is assembled, two times of positioned welding and fixing are conducted between the web and the two flange plates, and temporary supports are arranged. According to the method, the thick plate H steel is prefabricated in advance and subjected to reverse deformation, flange plate deformation and cross section size deviation are reduced, the operation without back gouging on the reverse side is achieved through the welding mode of low-current bottoming and submerged-arc welding secondary penetration, and the machining efficiency and the full penetration first-pass yield of the thick plate H steel are improved.

The invention provides a narrow gap swing laser welding pool wettability prediction method based on CFD simulation. The method comprises the following steps that an interaction platform is constructed through Python + PyQt5, and geometric modeling, UDF compiling and a material library module are integrated; the groove parameters and the swing track are dynamically loaded to a Fluent solver, and a full-coupling transient model of a steam recoil pressure-buoyancy-molten drop mass source item is established; in CFD-POST, the widest section of the molten pool is positioned on the basis of the contour surface with the volume fraction being 0.5, and Z-direction displacement-flow velocity data are extracted along the two side wall surfaces; fusing defects are predicted through double criteria of a bilateral average flow velocity difference threshold value and F test variance homogeneity; according to the method, dynamic quantitative evaluation of wetting behaviors can be achieved, the process development period is shortened, the defect detection rate is increased, and the method is suitable for aerospace thick plate welding quality control.

The invention discloses a high-impact-toughness Ti80 titanium alloy plate with the thickness larger than or equal to 50 mm and a preparation method. The preparation method comprises the steps that S1, a Ti80 plate blank with the thickness ranging from 200 mm to 500 mm is selected; (S2) plate blank rolling is conducted, specifically, after the plate blank is heated, the plate blank is subjected to 1-2 heating number rolling, a plate with the thickness ranging from 50 mm to 180 mm is obtained, the total rolling deformation ranges from 60% to 90%, and the finish rolling temperature is larger than or equal to T beta-250 DEG C, and (S3) plate straightening is conducted. According to the method, surface micro-hardening of the thick normalized intermediate-state plate blank is achieved through intermittent cooling, meanwhile, by controlling the rolling deformation amount and distribution of the deformation amount, deformation can permeate into the softened core portion more capacity, the core portion structure is refined, and the toughness of the core portion is improved; the problems that the surface and the core of the Ti80 titanium alloy thick plate (the thickness is larger than or equal to 50 mm) are inconsistent in structure, and the impact toughness of the core is insufficient are solved, and the prepared Ti80 titanium alloy thick plate can meet the requirement of ocean engineering equipment for thick plates.

Provided is a roller device for transporting heavy objects, which has a lower overall height than conventional roller devices for transporting heavy objects and can keep the overall height low even when a top plate for placing heavy objects is provided. 【Solution means】 A roller device 10 for transporting heavy objects, which is used to carry and transport heavy objects, includes a thick plate-shaped main body frame 11 having a plurality of openings 11c, and a plurality of tires 12 provided across the openings. The overall height H1 from the floor surface is set to be 24 mm or more and 28 mm or less. When a top plate 13 is provided, the upper surface of the main body frame has a step dug down by 1.0 mm or more and 2.0 mm or less in a circular shape into which the top plate fits.

The invention provides a stainless steel ultra-thick plate laser welding method and device, and the method comprises the steps that a to-be-welded end face of ultra-thick stainless steel is subjected to groove machining, the groove form is a combined form of a large truncated edge and a U-shaped groove, with the groove as a boundary, one end is a first base material, and the other end is a second base material; placing the workpiece according to a corresponding welding method, tightly butting the first base metal and the second base metal, fixing by using a clamp, and then cleaning a to-be-welded surface; the relative positions of the laser beam and the protective gas hood and the base metal are adjusted according to parameters required by the process, and a welding path is programmed or demonstrated; setting welding process parameters; and opening a protective gas valve, starting welding after the welding area is filled with protective gas, and performing front welding, back welding or front and back cover welding. The method can be used for penetration welding of stainless steel super-thick plates or backing welding of deep-groove and thick-truncated-edge super-thick plates, the welding efficiency can be remarkably improved, welding deformation is reduced, and the post-welding machining allowance of high-precision products is reduced.

The invention discloses a thick plate titanium alloy narrow gap laser-MIG hybrid welding device which is characterized by comprising a hybrid welding head module, a magnetic field regulation and control module, a double-oscillation collaboration module and an integrated protection module. The composite welding head module comprises an MIG welding gun and a laser gun head; the magnetic field regulation and control module comprises a magnetic field generation device arranged on the outer side of the MIG welding gun in a sleeving mode and a magnetic conduction rod stretching into the narrow gap groove, and the end of the magnetic conduction rod is parallel to the horizontal direction and is centered with the front end of the welding wire. According to the narrow-gap laser-MIG hybrid welding device for the thick titanium alloy plate and the using method of the narrow-gap laser-MIG hybrid welding device, an alternating magnetic field is introduced, electric arcs swing periodically and achieve precise cooperation with laser beam oscillation scanning motion, and on the premise that the welding quality is guaranteed, the welding efficiency is greatly improved. Efficient and high-quality welding of the thick plate titanium alloy narrow-gap connector is achieved, and the method has the remarkable advantages of being high in efficiency, low in material consumption, low in defect rate and the like.

The invention relates to a manufacturing method of a medium and large size double-layer stainless steel thick plate complex curved surface structural member. The manufacturing method comprises the following steps: respectively forming an outer shell, an inner shell, a rib plate, a supporting column and a taper sleeve; the four side faces of the peripheries of the inner shell and the outer shell, welding grooves and supporting column mounting holes are machined, welding grooves of rib plates are machined, and the rib plates comprise outer rib plates close to the outer side and T-shaped rib plates located inside; a T-shaped rib plate is welded on the inner side surface of the inner shell; carrying out low-temperature annealing treatment on the welded inner shell and the T-shaped rib plate; a taper sleeve is welded on the inner shell, and then a shielding block is welded on the taper sleeve; finish machining is conducted on a groove, welded to the shell, of the T-shaped rib plate; riveting the shell and the supporting column, and fixing by spot welding; welding the shell and the supporting column, firstly performing backing weld by using laser welding, and then performing filling by using TIG (Tungsten Inert Gas) welding; vibration aging; by means of the method, the welding efficiency is improved, welding deformation is reduced, and the overall profile precision is guaranteed.

GaAs IR window slabs having largest dimensions that are greater than 8 inches, and preferably greater than 12 inches, are grown using the Horizontal Gradient Freeze (HGF) method. Heat extraction is simplified by using a shallow horizontal boat that is only slightly deeper than the desired window thickness, thereby enabling growth of large slabs while also minimizing material waste and fabrication cost as compared to slicing and shaping thick plates from large, melt-grown boules. Single crystal seeds can be used to optimize the final orientation of the slabs and minimize secondary nucleation, thereby maximizing yield. A conductive doped GaAs layer can be applied to the IR window slab to provide EMI shielding. The temperature gradient during HGF can be between 1° C. / cm and 3° C. / cm, and the directional solidification can be at a rate of between 0.25 mm / h and 2.5 mm / h.

The invention discloses a wide and thick plate hot working burner period intermittent control method considering input saturation. The method comprises the steps that burner heat supply controllable areas are divided according to burner distribution positions in the length direction of a wide and thick plate; on the basis of the operation time sequence of the wide and thick plate in the furnace, a burner heat supply controllable area distribution parameter model is established according to the temperature sensor distribution position and temperature information. And designing a burner period intermittent control method considering input saturation. And on the basis of a Lyapunov functional and a linear matrix inequality theory, calculating and designing sufficient conditions for finite time stability of a burner heat supply controllable area distribution parameter system under the control method. Through the steps, the temperature control performance of the heating furnace can be improved, sufficient combustion of fuel in the furnace is achieved, and it is ensured that wide and thick plates are heated evenly and the target temperature reaches the standard.

The invention discloses a forming method of a titanium alloying high-boron stainless steel slab, which comprises the following steps: (1) melting molten steel through vacuum induction according to set components, and pouring to obtain an induction cast ingot; the alloy comprises the following components in percentage by mass: 0.2-2.5% of B, 0.5-5.0% of Ti, 17.0-21.0% of Cr, 10.0-16.0% of Ni, 0.5-2.5% of Mn, 0.1-1.5% of Si, less than or equal to 0.07% of C, less than or equal to 0.04% of P, less than or equal to 0.03% of S, less than or equal to 0.1% of N and other inevitable impurities, and the balance of Fe. (2) electroslag remelting is conducted on the induction cast ingot, an electroslag ingot is obtained, after diffusion annealing is conducted on the electroslag ingot at the temperature of 1100-1220 DEG C, hot forging cogging is conducted, and a thick plate intermediate billet is obtained; and (3) the thick plate intermediate blank is subjected to hot rolling and solution treatment with the single-pass rolling reduction being 3%-18%, and the titanium alloying high-boron stainless steel plate blank is obtained. In order to solve the problems that the high-boron stainless steel plate blank is small in specification, difficult to machine and limited in industrialization, the alloy component design is optimized, the forming process of titanium alloying, electroslag, hot forging and hot rolling is provided, and an effective technical route is provided for industrial production of the large-size and thick-specification plate blank.

The invention discloses a laser double-wire electric arc hybrid welding system with an adjustable heat source and a variable-gap thick plate component welding process. The hybrid welding system comprises a laser, a double-wire electric arc welding system and a welding robot. The welding robot comprises a robot body, a robot tail end connecting piece and a welding assembly. The welding assembly is fixedly connected to the tail end of the welding robot through the robot tail end connecting piece, the welding assembly comprises a laser welding head and a double-wire welding gun, and the laser welding head and the double-wire welding gun can form a heat source arrangement mode of laser guidance and series connection or parallel connection of double wires and laser. The self-adaptive welding device can adapt to self-adaptive welding of different welding seam assembling gaps, the welding mode that laser is guided in the front and double wires are connected with laser in series or in parallel is adopted, the preheating effect of the laser on a workpiece can be utilized, an arc welding electrode is effectively protected, the welding seam quality is improved, and the workpiece welding deformation amount is reduced.

The invention belongs to the technical field of submerged arc welding, and discloses a high-speed submerged arc welding method and system. In the submerged-arc welding process, special waveform control is adopted, that is, periodic voltage amplitude control is adopted for the welding voltage, cyclic control is conducted between the high-voltage period and the low-voltage period, and electric arcs in the high-voltage state and the low-voltage state repeatedly act on the combination position of the two base materials; and meanwhile, the welding current and the welding voltage are kept to have the same change trend. In the high voltage period, a rotating jet flow transition mode is adopted to blow away molten metal to expose unmolten base metal, meanwhile, the metal side wall of a molten pool is supported, the shape of the molten pool is kept, and electric arcs are stabilized; in the low-voltage period, a large-drop-shaped transition mode is adopted, the top end of the welding wire is lower than the base metal, and the bottom of the base metal is heated to increase the fusion depth. According to the invention, thick plate welding can be carried out by combining a welding wire with a smaller diameter with a general welding flux, and the method has the advantages of high wire feeding speed, increased penetration depth, narrowed weld bead, improved welding quality and the like.

The in-situ measurement method for the depth and the width of the thick plate aluminum alloy perforation welding small hole molten pool is characterized by comprising the following steps: 1, image processing: preprocessing an obtained image, removing random splashing influence through combination of CLAHE and Gamma correction, improving the image quality, enhancing the edge characteristics of the molten pool and improving the welding quality detection accuracy; 2, deep learning: improving the accuracy and stability of small hole molten pool edge identification by improving the direction perception position code of SegFormer and introducing a time sequence information fusion mechanism; the method has the beneficial effects that in-situ real-time measurement of the depth and the width of the small-hole molten pool is realized through an image processing and deep learning fusion method according to the real-time detection requirement of key geometric feature changes of the small-hole molten pool in the variable polarity plasma arc welding perforation process of the thick plate aluminum alloy.

The invention relates to a special welding method for aluminum alloy. The special welding method comprises the steps that S1, preparation before welding is conducted; s2, MIG welding bottoming is carried out; s3, the groove is filled through TIG welding, and surface covering is conducted; and S4, post-welding treatment is carried out. The composite technology of MIG welding bottoming and TIG welding capping filling is adopted, the method is used for thick plate aluminum alloy welding, deformation is small, the porosity is low, preheating is not needed, and the requirement for welding of complex structures and dissimilar materials is met. The welding speed is increased by 3 times, and the porosity is reduced from 2.1% to 0.5%; and the flaw detection qualification rate is increased from 85% to 98%. The shrinkage amount is reduced by 60-80%; and the workload of the correction process is reduced by 50%. The method is suitable for the fields of aerospace, automobile manufacturing, rail transit and the like.

According to the high-strength and high-toughness titanium alloy flux-cored wire and the preparation method and additive manufacturing application thereof, the flux-cored wire with good comprehensive performance is obtained by optimizing alloy components and a flux core formula and improving a preparation process according to material characteristics, so that the fluidity of a welding pool is improved, the stability of a welding arc is improved, and a welding seam structure is controlled. Meanwhile, the high-strength and high-toughness titanium alloy flux-cored wire is applied to the field of additive manufacturing, high-quality titanium alloy part additive manufacturing is achieved, the strength, toughness and corrosion resistance of parts are improved, and the strict requirements of the high-end manufacturing industry for the titanium alloy material performance can be met. The process can be simplified, cold continuous rolling is combined with vacuum annealing, 1-4 procedures are reduced compared with a traditional process, and efficiency is improved by 30%; the additive manufactured metal is high in obdurability, the crack resistance is superior to that of a conventional welding wire, and the crack rate is reduced by 50%; the method is suitable for electric arc additive manufacturing, thick plate welding and dissimilar titanium alloy connection, and the application prospect is wide.

The invention belongs to the technical field of plate curved surface forming, and particularly relates to a thick plate space curved surface forming method based on a multi-point die, which comprises the steps of S1, reduction schedule design, S2, self-adaptive feeding positioning, S3, dynamic die shape adjustment, S4, gradient coarse reduction, S5, gradual fine reduction, S6, online springback monitoring and S7, closed-loop correction. The optimal reduction regulation is generated through joint calculation of finite element simulation and a springback prediction model, real-time visualization of springback three-dimensional distribution is achieved based on a 1kHz high-frequency sampling force-displacement coupling monitoring system, out-of-tolerance springback is automatically corrected through a reverse compensation algorithm, meanwhile, a multi-sensor cooperative monitoring system and a prediction model constructed based on the mechanics theory are used for monitoring the springback three-dimensional distribution, and the real-time visualization of the springback three-dimensional distribution is achieved. Rebound distribution pre-judgment under different curvatures is achieved, and the shape precision stability of batch production is ensured through a closed-loop correction system.

The utility model discloses a hoisting mounting rack for an angle iron clamping device. The hoisting mounting rack comprises a hoisting bottom plate, a spring pressing plate assembly, a locking hook assembly, an electric wrench assembly and a hoisting ring, the hoisting bottom plate is a pi-shaped thick plate and is provided with an opening, and the upper surface of the hoisting bottom plate is used for fixedly arranging the spring pressing plate assembly; the two locking hook assemblies are symmetrically located on the two sides of the spring pressing plate assembly. And the electric wrench assembly. And the four lifting rings are respectively arranged at four corners of the lifting bottom plate. The quick-mounting clamping device is clamped by the quick-mounting clamping device, the quick-mounting clamping device is lifted to angle iron of an iron tower where the quick-mounting clamping device needs to be mounted through lifting equipment, then quick mounting is achieved, climbing operation of personnel is not needed in the whole process, mounting is convenient and fast, and safety is high.

The invention belongs to the technical field of visual identification, and particularly discloses a thick plate saddle-shaped weld groove feature extraction and size measurement method and system. Comprising the steps that based on multi-scale geometric feature mutation detection, a current frame weld groove three-dimensional point cloud is segmented into a branch pipe face, a groove side wall, a backing weld surface and a main pipe face, and four area three-dimensional point clouds are obtained; according to the three-dimensional point cloud of each area, determining an intersection point of a branch pipe surface and a groove side wall, an intersection point of the groove side wall and a backing welding surface, an intersection point of the backing welding surface and a main pipe surface, an intersection point of the branch pipe surface and the main pipe surface, and a virtual intersection point of the groove side wall and an extension line of the main pipe surface as weld groove feature points; and constructing vectors between the feature points, and calculating the geometric dimension of the weld groove through vector operation. The method is based on multi-scale geometric feature mutation detection and adaptive point cloud segmentation, a fitting curve slope threshold value does not need to be preset, and the method can be adaptive to different included angles between the branch pipes and the main pipe in the pipe tubular joint.