654 results about "Thick plate" patented technology

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 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 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 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.

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.

The invention discloses a control method and device for improving black marks on the surface of a thick plate in the technical field of controlled rolling and controlled cooling. The method comprises the steps that a pretreated plate blank is obtained; the pretreated plate blank is heated according to a preset heating system, and a heated plate blank is obtained; the heated plate blank is input into a descaling box to be descaled, and a plate blank subjected to primary descaling is obtained; the plate blank subjected to primary descaling is firstly input into a roughing mill to be subjected to cogging broadening and then input into a finishing mill to be subjected to thickness rolling treatment, and a semi-finished steel plate is obtained; and straightening and cooling the semi-finished steel plate to obtain a finished steel plate. The technical problem that in the prior art, due to existing controlled rolling and controlled cooling processes, black marks appear on the surface of the steel plate, and consequently the production cost is increased can be solved.

The application discloses a low-carbon-equivalent 355MPa grade normalized rolled thick plate organization uniformity control method, wherein the temperature of the billet before charging is less than or equal to 400 DEG C, the temperature of the soaking furnace is 1130-1150 DEG C, the time of the soaking section is 45-55 minutes, the total furnace time is 170-185 minutes, the second opening temperature of the billet is 880-940 DEG C, the finishing rolling is 6-8 passes, the cumulative reduction is 60-70%, and the final rolling temperature is 860-900 DEG C; the steel plate cooling is realized by adopting a laminar flow cooling system, the full-automatic water pouring control cooling mode is adopted, the water inlet temperature is 720-740 DEG C, the red temperature is 640-660 DEG C, and the surface temperature of the steel plate after cooling is monitored. The head and tail and the full-thickness organization type of the normalized rolled steel plate are all 'ferrite + pearlite' organizations, the grain size level is all above 9.0, there is no obvious banded structure and no bainite structure, and the problem of the organization difference of the 355MPa grade thick plate product caused by the normalized rolling is solved.

The invention discloses a forging and rolling combined method for preparing a large-specification super-long titanium alloy thick plate, which comprises the following steps of: S1, reversely deducing the size of a plate blank and the total amount of required raw materials according to the geometric size and working allowance of a target forged plate, designing the weight of a single cast ingot, mixing the raw materials and pressing into an electrode block, a titanium alloy cast ingot is smelted and prepared by adopting a three-time vacuum consumable electric arc smelting process; s2, after a high-temperature anti-oxidation coating is sprayed to the titanium alloy cast ingot, multi-heating-number forging is carried out, the multi-heating-number forging comprises high-temperature cogging forging, single-phase region forging and plate blank forming forging, and a rectangular plate blank is manufactured; s3, the plate blank is heated and subjected to two-phase region one-fire rolling, and a semi-finished thick plate is prepared; s4, after cracks and surface defects of the semi-finished thick plate are removed, the semi-finished thick plate is heated and subjected to two-phase region rolling, and a finished thick plate is manufactured; and S5, the super-long thick plate is sequentially subjected to annealing and surface treatment, and the finished plate is obtained. The method has the advantages that the traditional size limitation is broken through, the forming efficiency is improved, and the structure uniformity and the material performance of the large-specification forged plate are improved.

This invention discloses a spot-and-ring laser filler wire welding method, comprising the following steps: cleaning the surface and bevel of the welding plate, and fixing the welding plate on a welding fixture; using a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding of the welding plate; adjusting the defocusing amount, setting the diameter of the circular spot, and setting the diameter of the annular spot; setting the power of the circular spot and the power of the annular spot; setting the welding speed and the wire feeding speed; starting the welding system to perform welding, selecting the number of welding passes until the welding plate completes the butt welding. This invention uses a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding. The circular spot is used to melt the filler wire to perform laser filler wire welding, and the annular spot is used to heat the sidewalls, preventing sidewall melting defects. This can avoid sidewall incomplete fusion defects during narrow-gap welding of thick plates.

The invention provides a composite connection method for thick titanium alloy plates, and belongs to the technical field of metal material welding and additive manufacturing. According to the technical scheme, the method comprises the steps that symmetrical X-shaped grooves are machined in thick plate titanium alloy workpieces to be connected; a laser-electric arc hybrid welding system is adopted for conducting double-face bottoming welding on the X-shaped groove, so that a double-face bottoming welding seam is formed; and a powder feeding type laser cladding system is adopted, and multi-layer and multi-channel additive filling is conducted in the X-shaped groove above the double-face bottoming welding seam. According to the method, efficient laser-electric arc composite bottoming and low-heat-input laser cladding additive filling are separated, high-quality penetration of the root is guaranteed firstly, then welding deformation and residual stress are remarkably reduced through low-heat-input filling, the microstructure of a filling area is optimized, and therefore a welded joint with excellent comprehensive performance is obtained.

The invention discloses a welding method for titanium alloy thick plates, and relates to the technical field of laser welding, and the method comprises the following steps: placing a plurality of titanium alloy thick plates to be welded on a workbench, carrying out backing welding on backing welding areas of the titanium alloy thick plates to be welded, and carrying out continuous laser processing through picosecond pulse laser, reciprocating motion is conducted in the molten pool and the forging area; after the backing welding process is finished, a first laser wire filling welding area and a second laser wire filling welding area between different titanium alloy thick plates to be welded are welded in a laser wire filling welding mode, in the welding process, picosecond pulse laser follows continuous laser machining, and the welding process is completed. And reciprocating motion is conducted in the molten pool and the forging area according to a preset motion trail, so that different titanium alloy thick plates to be welded are welded. The technical effect that uneven distribution of the structure performance of the welding joint is avoided is achieved.

Provided are an intelligent design method and device for a thick-plate joint of longitudinal and cross members of an aluminum alloy vehicle frame. The intelligent design method includes: establishing a finite element model of a vehicle frame, analyzing static performance and fatigue performance of the vehicle frame under bending and torsion conditions, and selecting a connection joint of longitudinal and cross members with weak static performance and fatigue performance on the vehicle frame as a submodel; with connection parameters of the submodel as design variables, obtaining, by simulation, sets of training samples and a corresponding target response data set; establishing forward and inverse mapping relationships between design variables of a connection joint of longitudinal and cross members and target responses; and then on the basis of fully training the neural network model, obtaining an optimal layout scheme of connection joint fasteners of longitudinal and cross members by prediction and optimization.

The invention discloses automatic intelligent welding equipment for building material components, and belongs to the technical field of welding equipment.The automatic intelligent welding equipment for the building material components comprises a working frame, a containing assembly used for containing two to-be-welded metal thick plates is movably arranged on the working frame, and a pushing assembly is movably arranged on the working frame; a transverse moving assembly used for adjusting the position of the containing assembly is arranged on the pushing assembly, a portal frame is arranged in the middle of the working frame, adjusting assemblies movably corresponding to the two metal thick plates to be welded are movably arranged on the portal frame, and laser welding heads are movably arranged on the adjusting assemblies. A swing assembly used for driving the laser welding head to horizontally move in a reciprocating mode is arranged between the adjusting assembly and the laser welding head. The laser welding device has the advantages that the placing requirements of different angles of to-be-welded metal thick plates of different sizes are met, stable and continuous welding is achieved, automatic alignment is achieved, the welding precision is high, welding is uniform, and the structure is reliable.

The invention discloses a cold-crack-resistant welding wire for thick-specification ultrahigh-strength steel and a welding method of the cold-crack-resistant welding wire, and belongs to the technical field of welding, a low-cost alloy system with Mn as a leading part and Cr as an auxiliary part is constructed, Mn is used for reducing the Ms point, the hardenability of Cr is improved, and the Ms point of weld metal is regulated and controlled to be in a low-temperature phase change interval of 100-150 DEG C; in the welding process, the inter-pass temperature is controlled to be higher than the Ms point all the time, all layers of welding beads are kept in the austenite state in the filling process, all the welding beads are uniformly cooled, low-temperature martensite phase transformation is synchronously generated, the situation that phase transformation of the welding beads which are firstly welded too early occurs, and consequently pressure stress relaxation is caused is avoided, and part of retained austenite is reserved is avoided. By means of the characteristics of a medium Mn alloy system, the common cold crack risk in thick plate high-restraint welding is effectively avoided, it is ensured that weld metal has the ultrahigh strength, meanwhile, the alloy cost is remarkably reduced, and therefore the technical bottleneck of thick ultrahigh-strength steel in the low-cost and efficient welding application aspect is broken through.

The present invention provides a planar light source comprising: a mounting substrate having a special shape; a plurality of light sources two-dimensionally arranged in a first direction above the mounting substrate and a second direction perpendicular to the first direction in plan view; and a light diffusion plate provided above the plurality of light sources, the light diffusion plate including a thick plate portion and a thin plate portion having a plate thickness thinner than that of the thick plate portion, the thin plate portion being provided on at least a portion of the light diffusion plate positioned further to the outside than each of the light sources disposed on the outermost periphery in plan view. The distance from the optical axis of one light source to the outer edge of the light diffusion plate in the first direction is longer than the distance from the optical axis of the other light source to the outer edge of the light diffusion plate in the first direction in one light source and the other light sources located at the end of the first direction among the plurality of light sources. The width in the first direction of the thin plate portion is larger than the width in the first direction from the optical axis of one light source toward the outer edge of the light diffusion plate than the width in the first direction from the optical axis of the other light source toward the outer edge of the light diffusion plate.

The application relates to a steel truss bridge thick plate residual stress detection and repair integrated construction device, and belongs to the technical field of weld detection, which comprises a frame body, a drilling device, a strain gauge and a strain acquisition and analysis instrument are arranged on the frame body, a bearing disc is arranged on the frame body, the bearing disc slides along the vertical direction relative to the frame body, meanwhile, the bearing disc is also rotationally connected with the frame body, and the bearing disc rotates relative to the frame body; a polishing disc and a filler box are further arranged on the frame body, the polishing disc, the filler box and the drilling device are all located below the bearing disc, the polishing disc is rotationally connected with the bearing disc and rotates relative to the bearing disc; the filler box and the drilling device are fixedly connected with the bearing disc, the filler box is filled with metal filler, and a feeding pipe group for conveying the metal filler from the filler box to the outside is connected to the filler box, the application has the effect of timely plugging the residual small holes after the residual stress of the steel is detected, and the effect of repairing the steel is achieved.

This utility model discloses a veneer press for wood processing, specifically relating to the field of wood processing. It includes a worktable, a support base fixedly connected to one side of the worktable, a pressure-applying component fixedly installed on the upper surface of the support base, a positioning plate fixedly installed on the upper surface of the worktable, and a transmission base fixedly installed on the bottom surface of the worktable. Two bearing rings are fixedly embedded in the inner wall of the transmission base, and the inner rings of the two bearing rings are jointly fixedly connected to positive and negative lead screws. This utility model allows the spacing between two movable limiting plates along the transmission hole to be adjusted. Regardless of the difference in board width, the spacing between the movable limiting plates can be adjusted to ensure a close fit with the edge of the board, avoiding the problem of insufficient contact area caused by the limited adaptability range of traditional equipment. This enables the equipment to handle multi-specification processing needs from narrow, thin boards to wide, thick boards, enhancing the flexibility of veneer positioning.

This invention relates to a method for producing thin-gauge low-density steel sheets using a lap-rolling process. The chemical composition of the steel sheet, by mass percentage, is: C: 0.70–1.20%, Si: 0.10–0.50%, Mn: 16.00–24.00%, P: ≤0.015%, S: ≤0.003%, Al: 7.00–10.00%, Ni: 4.00–8.00%, Nb+Ti: 0.02–0.20%, with the balance being iron and unavoidable impurities. The method includes the following steps: billet preparation, billet compositing, billet welding, compositing billet heating, compositing billet rolling, steel sheet separation, and compositing billet straightening. A low-density steel intermediate billet of a certain thickness and identical length and width is selected as the lap-rolling billet. After welding, thin-gauge low-density steel sheets with a thickness of 3–6 mm and a width of 2000–3500 mm are produced on a medium-thick plate mill. The steel plate has an Fe-Mn-Al-C series composition and a density of 6.90-7.10 g / cm³. 3 The finished steel plate has a yield strength ≥1000MPa, tensile strength ≥1100MPa, elongation ≥20%, and Charpy V impact energy ≥20J at -40℃. The rolled steel plate has good uniformity in shape, thickness tolerance ≤±0.25mm, and flatness ≤4mm / m.

The application relates to the technical field of glass production, and particularly discloses thick plate glass, a preparation method thereof and application. The preparation method comprises the following steps: preheating: after the glass is placed, the glass is preheated in a preheating furnace, the upper surface preheating temperature of the preheating furnace is set to be 320-360 DEG C, the lower surface preheating temperature of the preheating furnace is set to be 310-350 DEG C, and the preheating convection fan rotating speed efficiency is set; heating: after the glass is preheated, the glass is heated in a heating furnace, the glass moves in the heating furnace, the upper surface heating temperature of the heating furnace is set to be 680-690 DEG C, the lower surface heating temperature of the heating furnace is set to be 670-680 DEG C, and the thick plate glass is prepared after the heating is completed. The application reduces the loss of the furnace corner part of convection, increases the heating efficiency of the middle part of convection, thereby improving the overall quality of the thick plate glass, reducing the thermal spot and the white mist appearing in the middle part of the glass. In addition, the heating is more reasonable, electricity is saved, and the production cost is reduced.

The invention relates to a method for achieving vibration suppression in thick plate cutting. The method comprises the following steps that a sliding window is initialized; acquiring a real-time height and inputting the height into a window; performing height value abnormity judgment; and outputting the scenarized height. According to the method and device for achieving thick plate cutting vibration suppression, the processor and the computer readable storage medium of the processor, the method for achieving thick plate cutting vibration suppression is provided, after thick plate vibration suppression is conducted on the capacitor height, the oscillation condition of a cutting head is obviously weakened, and the cutting efficiency is improved. The problems that in the prior art and equipment, the anomaly recognition precision is low, the scene distinguishing capacity is lacked, compensation control is not accurate, and full anomaly coping is insufficient are solved.

The invention belongs to the technical field of vibration reduction control of high-rise structures such as power transmission towers, and particularly relates to a tuned mass damper with eddy current and particle damping and adjustable frequency damping. Comprising a mass block, a compression spring, a guide rod, a linear bearing, a copper plate, a back plate, a rubber gasket, a first countersunk head screw assembly, a first permanent magnet set, a second countersunk head screw, a cover type nut, a shell cover plate, a shell, a sealing plate, a sealing ring, a steel pipe, a hoop assembly, a hexagon bolt assembly, a silicon steel sheet and a second permanent magnet set. The mass block is a rectangular thick plate, and the compression springs are arranged on the upper and lower surfaces to form an oscillator system. Copper balls and permanent magnets are additionally arranged on the basis of common eddy current damping to form a second damping system, eddy current damping and particle damping are combined, and the vibration reduction effect is better; under the same appearance size, damping and frequency are adjustable, the vibration reduction requirements of steel pipes at different positions of a power transmission tower are met, parts can be machined in batches during production, the damping ratio and frequency can be debugged on site, the vibration reduction requirements of different objects are met, and the project execution time is saved.

The invention provides an intelligent steel transfer control method and system for a thick plate production line. The method comprises the following steps: acquiring standard data of a rough rolling link of the thick plate production line and acquiring a standard image in a steel transfer area through image acquisition equipment; inputting the standard image into the target detection model, and outputting feature data; inputting the standard data and the characteristic data into a rotating speed prediction generation model, and outputting a rotating speed control curve of the steel rotating roller way; and a steel rotating request signal in the rolling process state data is extracted, a control command and a rotating speed given instruction of a steel rotating roller bed are generated according to the rotating speed control curve, and the steel rotating roller bed is controlled to drive the intermediate billet to rotate according to the rotating speed control curve. The rotating speed control curve is generated by extracting the standard data and the characteristic data in the rolling process state data, the steering command and the rotating speed given command are generated based on the rotating speed control curve, the steel rotating roller way is driven to operate according to the commands, and the problems that manual steel rotating is low in precision, lagged in response and low in efficiency are solved.

The application discloses a welding method for improving low-temperature impact toughness of thick plates in a stress relief heat treatment state, which comprises the following steps: processing a groove; symmetrically processing an X-shaped groove on a welding section of a thick steel plate to be welded, wherein the X-shaped groove comprises a central flat part and two inclined parts symmetrically arranged on both sides of the central flat part in a thickness direction; pre-welding; controlling an assembly gap of the tailor-welded thick steel plate to be zero, and adopting tungsten argon arc welding to pre-weld a welding bead on both sides of the groove root of the upper and lower surfaces of the thick steel plate; and welding; adopting submerged-arc welding to weld and fill the groove on both sides of the upper and lower surfaces of the thick steel plate containing the pre-welding bead. The welding method for improving low-temperature impact toughness of thick plates in a stress relief heat treatment state can effectively improve the low-temperature impact toughness of the weld.

The application discloses a bending machine deformation detection mechanism and method, which comprises a deformation sensor and a control system; the bending machine comprises a lower side plate and a slider located directly above the lower side plate, and the height of the slider can be lowered; a deformation proportionality coefficient K is built in the control system; wherein the deformation proportionality coefficient K is the ratio of the elastic deformation A of the slider to the elastic deformation B of the lower side plate; the deformation sensor is arranged on the lower side plate or the slider and can be used for detecting the elastic deformation of the lower side plate or the slider. The application can realize real-time detection of bending deformation while saving cost. Especially when bending a large-format thick plate, the bending precision of the plate can be improved, and the waste of the plate can be reduced. Especially when the application is equipped with the function of an intelligent bending production line, closed-loop real-time intelligent automatic control can be realized. Further, the application can calculate and compensate the initial deviation of the upper and lower dies, so that the installation and debugging are more convenient.

The invention relates to the technical field of spoke stamping dies, in particular to an intelligent spoke stamping combined die which comprises a lower die holder, a female die is fixedly connected to the upper surface of the lower die holder, an upper die holder is arranged above the lower die holder, and a plurality of first sleeves are fixedly connected to the upper surface of the lower die holder; and first connecting rods are slidably connected into the multiple first sleeves. According to the automatic stamping device, through the arranged stamping speed self-adaptive assembly, self-adaptive adjustment of the speed and stability can be achieved according to different stamping characteristics of thick plates and thin plates, through the arranged self-adaptive adjusting assembly, automatic detection of the thickness of the plates and convenient control over stamping parameters can be achieved, and through the arranged die cooling assembly, the stamping speed and stability of the plates can be greatly improved. The mold cooling system can efficiently cool a mold, automatic start and stop of the cooling system can be achieved through the arranged cooling start and stop control assembly, and the cooling frequency can be flexibly adjusted according to the thickness of a plate through the arranged cooling frequency adjusting assembly.

The application discloses a thick plate welding method with good low-temperature impact toughness in a stress relief annealing state, which comprises the following steps: processing a groove; symmetrically processing an X-shaped groove on a welding section of a thick steel plate to be welded, the X-shaped groove comprising a central flat part and two inclined parts symmetrically arranged on both sides of the central flat part in a thickness direction; and welding; controlling an assembly gap of the tailor-welded thick steel plate to be zero, and adopting five-wire submerged arc welding to perform single-pass welding on upper and lower surfaces of the thick steel plate respectively. The welding method adopts high-efficiency five-wire submerged arc welding, and through reasonable setting of angles of welding guns and polarities of power sources, reasonable matching of welding materials and process parameter windows, cooperation of an optimized groove form and the process parameter window, and the like, low-temperature impact toughness of a weld after stress relief annealing heat treatment is avoided from greatly decreasing.

The utility model provides a combined sizing sleeve, and relates to the technical field of pipe production, the combined sizing sleeve is provided with a supporting frame and a sizing die, the supporting frame is provided with a first flange, a second flange and a supporting rod, and the supporting rod is arranged between the first flange and the second flange; the sizing die is provided with a first die plate and a second die plate; sizing holes are formed in the first die plate and the second die plate; the first template is arranged on the first flange, and the second template is arranged on the second flange; the combined sizing sleeve is used for sizing an extruded pipe, the pipe penetrates through the sizing hole, and the sizing die is used for controlling the outer diameter of the pipe; the support frame is provided with the first template and the second template with different sizing holes, so that pipes of different models can be produced; the first mold plate and the second mold plate are both in the thick plate shape, materials are saved, the machining cost of the sizing mold can be reduced, and machining and storage are convenient.

The utility model provides a container ship hatch coaming thick plate weld joint preheating and post-heating process device, which relates to the field of heating process devices, and comprises a support plate, a brushless motor driving wheel, a positioning upright post and a support upright post, a worm gear lifter is arranged on the supporting upright post and is used for driving the heating working platform above to lift; the heating working platform is connected with an induction electric heater through a sliding rail and a support, and horizontal adjustment of the heating position is achieved. The positioning stand columns are located in the positioning grooves, can move transversely and are provided with screwing bolts to clamp the steel plate. According to the device, the adjustable induction heater is carried through the movable platform, non-contact preheating and post-heating of a welding seam are achieved, welding deformation can be prevented, and the device has the advantages that working hours are saved, efficiency is improved, and operation is convenient.