337 results about "Thick wall" patented technology

The invention belongs to the field of production control, and particularly discloses a control method of a thick-wall optical product precision injection molding hot runner system, which comprises the following steps of: acquiring mold geometric data of local thickness distribution in a mold-containing cavity along a melt flowing direction, calculating theoretical cooling time constants of each region by combining material thermophysical parameters, and calculating the cooling time constant of each region; establishing a thickness-cooling rate mapping relation model; predicting the time when the melt reaches each area and the effective cooling time according to an injection time sequence; solving a temperature compensation value of a heating area corresponding to the hot runner by taking the minimum final temperature variance when the key area is ejected as a target; and finally, dynamically applying a compensation value according to a time sequence before the melt arrives, and withdrawing / adjusting after region filling is completed or a pressure maintaining stage is entered. The invention can balance the temperature field of the mold cavity, reduce the refractive index gradient and shrinkage defect, improve the optical performance and yield of the product, and is suitable for precise injection molding of the thick-wall optical product.

The invention relates to the technical field of die-casting dies, and discloses a partitioned differential temperature cooling die-casting die for a complex aluminum alloy shell, which comprises a die body, and a thick-wall region, a thick-wall transition region and a thin-wall region are arranged in the die body; the mold body is provided with independent cooling units corresponding to the thin-wall area, the thick-wall transition area and the thick-wall area respectively, and each cooling unit is communicated with a cooling liquid transmission pipe through a self-adaptive sealing anti-leakage structure; thin-wall area cooling pipes arranged in a Z shape are installed on the outer side of the thin-wall area in an attached mode, spiral thick-wall transition area cooling pipes are installed on the outer side of the thick-wall transition area in an attached mode, and thick-wall area cooling pipes with built-in spoilers are installed in the thick-wall area in an embedded mode. According to the partitioned differential temperature cooling die-casting die for the complex aluminum alloy shell, through the partitioned independent temperature control cooling unit, the self-adaptive sealing anti-leakage structure and surface strengthening treatment, accurate cooling of regions with different wall thicknesses is achieved, the product forming quality is improved, the die universality is enhanced, the service life of the die is prolonged, and the maintenance cost is reduced.

The invention relates to the technical field of plastic injection molding, in particular to a multi-point glue feeding method for a thick-wall light-emitting body of an automobile tail lamp and an injection molding mold, and the method comprises the steps that product parameters are obtained in response to a detection signal, and a correlation coefficient, a guide angle and a reference track are determined according to the product parameters; injecting the magnetic ball and the detection liquid from a pouring gate position at a guide angle based on a track control method, and collecting a moving track; when the moving track does not coincide with the reference track, an adjusting coefficient is determined according to the moving track and the reference track, and the guide angle is corrected; when the moving track coincides with the reference track, defining the guide angle as a target angle; the injection molding angle is determined according to the target angle and the correlation coefficient, molten plastic is injected from the sprue position, and then a connection image of the product is collected; and the injection molding angle is corrected according to the existence condition of the cross color feature in the connection image. The device has the effect of avoiding color crossing of two materials in a product.

This invention provides a method for producing small-diameter, thick-walled near-α-type titanium alloy tubing and its application. This method, through the use of cladding and heated rolling, increases the deformation per rolling pass, reduces the number of rolling passes, and results in a finer microstructure and better mechanical properties in the heated-rolled tubing. Simultaneously, the composite material composed of the cladding layer and silica aerogel effectively prevents the alloy rod from contacting air, avoiding further surface oxidation and reducing the thickness of the oxide layer on the rod surface. Furthermore, the composite material forms a "thermal insulation layer" on the surface of the alloy rod, preventing large temperature differences between the surface and core during heated rolling, thus ensuring better microstructure uniformity and surface quality. In this invention, the cladding process expands the selection of heating furnaces and reduces equipment requirements.

The invention relates to the technical field of steel pipe machining, in particular to a thick-wall steel pipe machining device of a laser cutting integrated structure. The thick-wall steel pipe machining device comprises a main rack, a rotating assembly is arranged at the position, close to the middle, of the top of the main rack, and a bearing assembly is arranged at the position, close to one end, of the top of the main rack; a laser cutting assembly is arranged at the top of the main rack and located between the rotating assembly and the bearing assembly, and a cleaning unit is arranged at the position, below the laser cutting assembly, of the top of the main rack. The cleaning unit comprises a shell in sliding connection with the main machine frame, a mounting cavity is formed in the top end of the shell, a driving wheel is rotationally connected into the mounting cavity, and butt joint discs are arranged at the positions, located on the two sides of the driving wheel, in the mounting cavity. The continuity is improved through integration of cutting, separating and deburring, double-end machining is achieved through double-end synchronous reverse driving and independent triggering rotation, the butt joint assembly and the cutter assembly are in linkage to be matched with steel pipes of multiple specifications, and the deburring precision is guaranteed.

The invention discloses a TC11 titanium alloy thick-wall pipe diameter forging process parameter optimization method, which relates to the technical field of metal plastic forming process optimization, and comprises the following steps: clearly defining a structure defect problem caused by non-uniform deformation energy in diameter forging of a specific pipe blank and an optimization target; constructing a simulation model to calculate forming sizes and internal deformation energy distribution under different process parameters; training a neural network agent model embedded with a deformation energy uniformity optimization target; using the model to drive a multi-objective optimization algorithm, and automatically searching an optimal process parameter combination; and selecting and outputting a final optimal process parameter from an optimization result. According to the method, the quantitative index reflecting the deformation energy distribution uniformity is embedded into the process optimization model, so that the internal deformation energy distribution of the material can be collaboratively optimized while the macroscopic size is optimized, and the problem that the recessive factor which affects the final structure performance of the component is difficult to effectively evaluate and actively regulate and control in the process design stage in the existing method is solved.

The invention provides a segmented heat control welding method and system for a dual-phase steel thick-wall component, and relates to the technical field of welding. The method comprises the steps that a segmented unit planning set is constructed; generating a segmented unit multi-source synchronous data set; constructing a welding thermal cycle characteristic parameter set; generating a welding control constraint set; obtaining a segmented heat input deviation instruction set; generating a welding process parameter adjusting instruction; and according to the actual welding seam structure performance in the long-term welding process, a parameter optimization algorithm is adopted to optimize the adjustment process, and continuous updating of the segmented heat control welding model is achieved. The technical problems that in the prior art, heat input control is extensive, temperature field monitoring is not comprehensive, technological parameter adjustment lags behind, and quantitative bases are lacked are solved.

A laying structure of and a laying implementation method for a thick-walled multi-cavity pultruded beam in the shape of a Chinese character "目" for a vehicle body, relating to the technical field of rail transit. The laying structure comprises a first cavity region (1), a second cavity region (2), a third cavity region (3), and an outer skin region (4) that are all formed by laying multi-axial fabrics. The second cavity region (2) is located between the first cavity region (1) and the third cavity region (3), and the first, second and third cavity regions are collectively wrapped by the outer skin region (4) to form a rectangular structure in the shape of the Chinese character "目". In the laying structure of a thick-walled multi-cavity pultruded beam in the shape of the Chinese character "目" for a vehicle body, quasi-isotropic mechanical properties of the thick-walled multi-cavity pultruded beam in the shape of the Chinese character "目" for a vehicle body are achieved by laying multi-axial fabrics; moreover, the laying structure is adapted to a pultrusion process, and optimizes the structural design, improving the overall rigidity and strength.

The invention relates to the technical field of seamless steel tube processing, and provides a processing technology of a high-temperature-resistant seamless steel tube, which comprises the following steps: blank preparation and pretreatment: preparing a stainless steel blank with the Cr content of more than or equal to 10.5% by adopting an electroslag remelting smelting technology, and carrying out high-temperature homogenization diffusion annealing on a cast ingot, and hot working forming is conducted, specifically, the pretreated blank is heated to 1080-1200 DEG C, perforating rolling is conducted through a three-roller skew rolling perforating machine, a thick-wall tubular billet is formed, online temperature control cooling, warm rolling and online solution treatment are conducted after perforating, and warm rolling is conducted on the thick-wall tubular billet within the range of Ac1 to 980 DEG C. By matching the electroslag remelting and high-temperature homogenization diffusion annealing process, element segregation and internal tiny defects of a casting blank are effectively reduced, the structure uniformity and purity of the blank are remarkably improved, the problem of insufficient structure uniformity in an existing process is solved from the source, and a basic guarantee is provided for excellent high-temperature performance and corrosion resistance of a product.

The invention relates to the technical field of pipe manufacturing, and particularly discloses an unequal-wall-thickness cold-rolled seamless pipe and a manufacturing method thereof.The manufacturing method of the unequal-wall-thickness cold-rolled seamless pipe comprises the steps that S100, a seamless round pipe is selected as a pipe blank; s200, wall thickness partition design is conducted in the circumferential direction and the axial direction of the pipe blank, and the specific positions and wall thickness values of a thick-wall area and a thin-wall area are determined; and S300, the pipe blank is loaded into a cold rolling mill, asymmetric cold rolling forming is adopted to enable the pipe blank to form an unequal-wall-thickness structure with two thin-wall areas and two thick-wall areas, the two thin-wall areas and the two thick-wall areas are sequentially connected in the circumferential direction, and the thin-wall areas and the thick-wall areas are alternately arranged. According to the process, through the preset wall thickness distribution design, a single seamless round pipe is directly formed, optimal configuration of materials is achieved, the thick-wall area is planned and formed in the area needing high strength through thickening, the thin-wall area is planned and formed in the non-key area through thinning, unification of light weight and high performance is achieved, and the flexibility of pipe body manufacturing and machining is improved.

This utility model relates to the field of cast iron pot mold technology and discloses a multi-temperature zone circulating preheating heating device for cast iron pot molds. It includes a base, with support columns symmetrically fixedly connected to the top of the base in all directions. A fixed seat is fixedly connected to the top of each of the four support columns. A pressing and heating mechanism is provided on the top of the base. Multi-temperature zone differentiated heating is achieved through a combination of an electromagnetic induction coil and an infrared radiation heating tube. The electromagnetic induction coil is arranged between the bottom of the lower mold base and the inner mold, using the principle of electromagnetic induction to rapidly heat the bottom of the mold, suitable for efficient heating of thick-walled parts of the cast iron pot mold. The infrared radiation heating tube is located between the lower mold base and the inner mold, above the heat insulation ring, and can uniformly radiate heat to the sidewalls of the mold. The combined effect of these two methods significantly shortens the preheating time compared to traditional single heating methods, while simultaneously meeting the temperature requirements of different parts of the mold, effectively improving production efficiency.

The application relates to the technical field of film drying, and discloses a drying and forming device for films, which comprises a shell, two groups of cooling cylinders are rotatably installed in the opposite inner walls of the shell, rotary joints are installed at the two ends of the two groups of cooling cylinders, connecting pipes are installed on the sides, away from the corresponding cooling cylinders, of each rotary joint, and the two cooling cylinders are staggeredly arranged, the two groups of staggeredly rotating cooling cylinders are arranged in the shell, drying mechanisms are arranged on the two sides of the corresponding cooling cylinders, and the film material can be subjected to regional and adjustable drying treatment during movement; when the film passes through the staggeredly arranged cooling cylinders, film sections with different thicknesses can obtain differential heat dissipation effects due to the difference in contact area with the cooling cylinders; in cooperation with the drying mechanisms, the thin-wall region can be prevented from being damaged due to excessive heating, and the thick-wall region can be ensured to be fully dried, so that the uniformity and yield of film material drying and forming are improved, and the problem of poor adaptability of traditional devices to film thickness changes is effectively solved.

The invention discloses a recycled carbon fiber continuous tow, a continuous roving preparation method and application. The continuous tow is formed by lapping and bonding a plurality of sections of original recycled carbon fiber tows with finite lengths after the end parts are thinned. The method for preparing the continuous roving comprises the following steps of: thinning the end part of the recycled carbon fiber tow with finite length, and overlapping and bonding to form a continuous tow; and plying (optional) and binding with spun yarns to obtain the continuous roving. According to the method, the problems that recycled carbon fibers cannot be continuous, the linear density is uncontrollable and the manufacturability is poor are solved through unique thinning lap joint and fine line binding processes, and the prepared continuous roving has high linear density and good spreadability and shape follow-up performance, is particularly suitable for being used as a high-performance and low-cost reinforced filling material of a thick-wall composite material, and can be used for preparing the high-performance and low-cost reinforced filling material of the high-performance and low-cost reinforced filling material of the high-performance and low-cost reinforced filling material of the high-performance and low-cost reinforced filling material. The high-value application of the recycled carbon fibers is realized.

The invention relates to a variable cross-section underground diaphragm wall structure and a construction method, the variable cross-section underground diaphragm wall structure comprises an upper thin-wall diaphragm wall structure, a middle thick-wall diaphragm wall structure and a lower thin-wall diaphragm wall structure, and the upper, middle and lower diaphragm wall structures with different thicknesses are designed into the integral variable cross-section underground diaphragm wall structure through reinforcement cages in different forms. By adopting the variable cross-section underground diaphragm wall structure, the wall sections with different thicknesses at the upper part, the middle part and the lower part are connected into a whole through the integral reinforcement cage design, so that the material consumption is optimized, and the integrity and the stress performance of the structure are ensured. The structure is suitable for the deep foundation pit and the special working condition adjacent to the existing diaphragm wall, by arranging the thick-wall wall section in the key stress area of the newly-built foundation pit support, the anti-upheaval and anti-seepage stability of the pit bottom is effectively improved, and unnecessary material waste is reduced through the thin-wall design of the upper ground wall and the lower ground wall.

This invention relates to the field of laser processing technology and discloses a laser cutting process and apparatus for thick-walled tubes combined with electrochemical jet slag removal. The process includes: an automatic buffer material feeding and recovery mechanism pushes a high-temperature resistant ceramic-based inner liner tube into the inner cavity of a thick-walled tube as a buffer material for laser cutting; after cutting, the buffer material is removed, a physical sliding isolation sealing door is closed in conjunction with a flexible clearance pad, and a positive pressure air curtain blowing device is activated to seal the processing area; the thick-walled tube is connected to the anode of a power source, and the inner and outer jet nozzles are connected to the cathode, spraying high-pressure sodium nitrate passivation electrolyte into the residual slag area. The slag removal mechanism, which combines physical shielding at the slag source with electrochemical anodic dissolution and high-pressure liquid flow flushing, eliminates the contact stress caused by mechanical hard cutting and avoids the problem of micro-cracks at the tube wall wear ports; a spatial isolation protection mechanism prevents salt spray from eroding the optical lenses of the fiber laser cutting head and the machine tool transmission guide, completing a non-destructive slag removal operation.

The invention discloses a heat treatment method for preventing a thick-wall additive manufacturing part from deforming and cracking. The heat treatment method comprises the following steps that firstly, an effective thickness is determined, and the homogenization heat preservation time is determined according to the effective thickness; step 2, determining a second phase () precipitation amount-time relation curve graph of the additive manufacturing part at each temperature, and determining inflection point time of the curve at each temperature and a temperature at which the maximum precipitation amount of the second phase () is less than 10% at a high-temperature section; 3, determining a first temperature, a second temperature and a third temperature; fourthly, a heat treatment scheme of the additive manufacturing part is formulated, wherein the heat treatment scheme comprises low-temperature section heating and heat preservation; heating and preserving heat in a medium-temperature section; heating and preserving heat in a high-temperature section; and furnace cooling, wherein the temperature is reduced to 150 DEG C or below in a segmented mode. According to the method, the internal stress is eliminated through heat treatment, and the non-deformation and non-cracking additive manufacturing part is obtained.

This invention relates to a gradient surface modification method for hydrogen-resistant thick-walled pipes used in hydrogen-powered vehicles, comprising the following steps: S1: pre-treating the thick-walled metal pipe wall; S2: depositing a bottom layer on the pre-treated pipe wall surface, wherein the bottom layer is a CrN and TiN composite layer; this invention uses a Si3N4 / SiCN composite intermediate layer as the main hydrogen barrier layer, utilizing the extremely low hydrogen diffusion coefficient of Si3N4 and its dense amorphous network structure to effectively block the penetration of hydrogen atoms into the metal matrix. Simultaneously, the DLC surface layer serves as the first line of defense, utilizing its high hardness and low friction coefficient to resist the erosion and wear of high-pressure hydrogen gas flow, extending the service life of the barrier layer.

The utility model discloses a kind of double-focus reflection systems and the car light with it, the double-focus reflection system includes: thick wall spare and collimating system;One end of the thick wall spare is light-reflecting surface, the other end of the thick wall spare is formed into light emitting surface;The collimating system is formed in one side of thick wall spare;The collimating system includes: first half collimating unit and second half collimating unit;The focal point of the first half collimating unit is equipped with first light source;The focal point of the second half collimating unit is equipped with second light source;The first half collimating unit includes first total reflection surface and multiple first refracting surface;The second half collimating unit includes second total reflection surface and multiple second refracting surface;Multiple first refracting surface and multiple second refracting surface are arranged in multiple, the first total reflection surface and second total reflection surface are oppositely arranged, and respectively located in both ends of multiple first refracting surface and multiple second refracting surface, the utility model has the advantages of saving space occupation, and guarantee lighting effect consistent.

This invention discloses a method for near-net-shape forming of complex thin-walled irregular-shaped rings based on a dissimilar material cladding, relating to the field of material plastic forming technology. The method includes: determining the required blank material and cross-sectional allowance of the same material for ring rolling forming of the target ring; determining the dissimilar material cladding based on the cross-sectional allowance; the dissimilar material having a higher stiffness than the blank material; fabricating the blank material and the dissimilar material cladding; covering the blank material with the dissimilar material cladding and performing ring rolling to obtain an initial ring; and removing the cladding from the initial ring to obtain the target ring. This invention solves problems such as buckling instability, loss of dimensional accuracy, uneven wall thickness, excessive ellipticity, and large subsequent machining and low material utilization under large allowance design during the rolling process of thin-walled rings. It achieves high-precision near-net-shape forming of large-diameter, thick-walled titanium alloy irregular-shaped rings, improving material utilization and reducing material costs.

The invention discloses a preparation method of a bamboo-imitating modulation structure metal composite board, and belongs to the technical field of composite material preparation, and the method comprises the following steps: by taking one or more metal boards with adjustable hardness difference as raw materials, sequentially overlapping at least three layers according to design requirements through explosive welding, carrying out heat treatment according to requirements to regulate and control the hardness difference of each layer, and carrying out heat treatment to obtain the bamboo-imitating modulation structure metal composite board. Cold deformation or thermal deformation is conducted firstly, then heat treatment is conducted, the layer thickness and proportion and element, structure and hardness distribution characteristics of all layers are regulated and controlled, and the bamboo-imitating modulation structure metal composite plate is obtained. The main heterogeneous characteristics of the composite material prepared by the method imitate a staggered structure formed by hard thick-walled cells and soft parenchyma cells in bamboos, postweld treatment can be performed according to the thickness and the proportion of the thickness required by structure property coupling enhancement so as to perform controllable adjustment, and meanwhile, the heterogeneous characteristics such as components and structures can be designed; and higher-level strength and plasticity synergy can be realized.

The application relates to the technical field of intelligent retail and display, and particularly discloses a multi-coating essence slow-release coating for a prop model. The multi-coating essence slow-release coating for the prop model comprises a primer layer, a middle coating layer and a top coating layer which are sequentially coated on the surface of a prop model base material; the primer layer contains front-tune essence microcapsules, and the front-tune essence microcapsules are thick-wall slow-release essence microcapsules; the middle coating layer contains middle-tune essence microcapsules, and the middle-tune essence microcapsules are environment-responsive essence microcapsules; and the top coating layer contains rear-tune essence microcapsules, and the rear-tune essence microcapsules are porous thin-wall slow-release essence microcapsules. When the multi-coating essence slow-release coating for the prop model is applied, a static prop model can be converted into an intelligent fragrance interactive carrier which can actively provide hierarchical fragrance, can respond to external interaction and has vitality, and the overall application quality is excellent.

This utility model discloses a continuous melt-compensated thick-walled plastic pipe extrusion equipment, belonging to the field of plastic pipe extrusion molding technology. It includes: an extruder, a feeding die, a shaping sleeve assembly, and a traction machine arranged sequentially; a feeding channel is formed between the inner and outer walls of the feeding die, and a melt channel is formed between the inner and outer walls of the shaping sleeve assembly, with the feeding channel and melt channel connected; both the inner and outer walls of the shaping sleeve assembly are integrated with cooling systems to achieve gradient cooling of the pipe from the surface to the interior, causing the pipe at the melt channel outlet to solidify into a solid part, while the inlet end remains molten, forming a conical melt compensation zone; the traction speed of the traction machine is set to be less than the extrusion speed of the extruder, and under the action of extrusion pressure and traction resistance, the melt continuously compensates and fills the solidified pipe core. Through a synergistic mechanism of "simultaneous cooling, shaping, and material replenishment," rapid shaping of the inner and outer walls of the pipe and dynamic core shrinkage are achieved, ensuring uniform pipe wall thickness and eliminating internal defects.

The invention belongs to the technical field of well drilling equipment, and discloses a thick-wall windowing milling cone which is used for windowing operation of old well casings. The thick-wall windowing milling cone is configured to extend into the casing pipe and windowing the side wall of the casing pipe. The thick-wall windowing milling cone comprises a connector, a drill bit and an eccentric drill bit. Wherein one end of the joint is connected to the driving mechanism; the drill bit is fixedly connected to the end, away from the driving mechanism, of the connector and is configured to cut and mill the side wall of the sleeve. The eccentric bit is eccentrically arranged on the outer end face of the body bit away from the connector. The eccentric drill bit is matched with the main drill bit, and after the eccentric drill bit breaks through the sleeve, due to the eccentric arrangement of the eccentric drill bit relative to the main drill bit, the amplitude of the main drill bit can be improved under the action of rotation and self gravity, so that the impact force of the main drill bit is indirectly improved, and the main drill bit can finish window opening operation more quickly.

A method for setting out reserved holes in curtain grouting stop walls based on Dynamo, relating to the field of building construction technology. The method includes: extracting the coordinates and corresponding diameters of the borehole opening and bottom from borehole design data; connecting the coordinates to generate the borehole axis, and transforming the initial contour constructed based on the diameter to the normal coordinate system at both ends of the axis; fusing the contours at both ends along the axis to generate a three-dimensional variable-diameter grouting hole model; extending the stop wall contour according to a preset thickness to generate a three-dimensional stop wall model; performing Boolean difference operations on the two models to remove overlapping parts, obtaining a layout model of irregular holes; extracting the inner and outer double boundary lines generated by the oblique intersection of the hole and the thick wall surface as spatial intersection lines; reducing the dimension of the intersection line to a two-dimensional plane to generate spline curves, and outputting the hole location layout diagram. Implementing the technical solution provided in this application improves the accuracy of grouting hole location layout while ensuring construction efficiency.

This invention relates to the field of casting mold technology, specifically a casting mold and casting method for automotive baffle assemblies. The process includes: S1, mold preheating: adjusting the injection mold temperature to 40-80℃ and maintaining this temperature for 15-30 minutes; S2, mold closing and vacuuming: after mold closing, activating the vacuum pumping assembly to reduce the vacuum level in the cavity to below 30 mbar; S3, injection filling: injecting molten plastic at a low speed of 20-50 mm / s to the gate, and then switching to a high speed of 80-150 mm / s for rapid filling after the molten plastic seals the gate. The design employs a segmented temperature control system to specifically control the temperature difference between the thin-walled and thick-walled areas of the mold. Combined with a flow rate compensation mechanism for independently controlled cooling water channels, this innovative design solves the problems of insufficient filling and shrinkage deformation in unevenly thick plastic parts from the source. This allows the deformation of the plastic part to be controlled within 0.03 mm, reducing the defect rate by more than 70% compared to traditional processes.

The invention provides a tube bundle type stress buffering device, which relates to the technical field of pipeline stress buffering, and comprises a tube bundle assembly and two interface assemblies, the two interface assemblies are suitable for being in fluid communication with two external devices respectively; the pipe bundle assembly comprises a plurality of bent pipelines arranged in parallel, and each bent pipeline is connected between the two connector assemblies and is constructed to achieve fluid communication between the two external devices, absorb relative displacement between the two external devices through elastic deformation of the bent pipeline and buffer stress generated by the relative displacement. A plurality of bent pipelines are arranged to replace a single thick-wall pipeline, due to the fact that the caliber of a flow channel is reduced, the thickness of the pipe wall is allowed to be reduced on the premise that the pressure-bearing strength is met, meanwhile, the overall deformation absorption capacity is improved, and the size and the weight of the stress buffering device are reduced.

The utility model provides thick-wall drip irrigation tape bundling and packaging equipment, relates to the technical field of packaging equipment, and solves the problem that the efficiency is low when thick-wall drip irrigation tapes are packaged at present. A first fixing rod and a second fixing rod are mounted on the surface of the mounting frame, a first rolling wheel and a second rolling wheel are mounted on the surfaces of the first fixing rod and the second fixing rod correspondingly, a first mounting block is mounted on the surface of the mounting frame, and a conveying opening is formed in the surface of the first mounting block; a conveying opening is formed in the surface of the mounting frame, a pressing assembly is arranged on the surface of the conveying opening, a conveying rail is mounted on the surface of the mounting frame, a conveying assembly is arranged in the conveying rail, a clamping assembly and a heat sealing assembly are mounted on the surface of the mounting frame, and a cutting assembly is mounted in the clamping assembly. According to the device, drip irrigation belts can be automatically packaged through a series of mechanical assemblies, and the working efficiency is improved.

The invention discloses an on-line controlled cooling process for a Q345B medium-thick-wall seamless steel pipe. The rolling process comprises the following steps: heating in an annular furnace, punching, continuous rolling, sizing, on-line controlled cooling, cooling in a cooling bed and finishing; the heating system of the annular furnace is limited; the roller way speed is set to be 0.6-1.0 m / s, 16 groups of spraying pipes spray water normally, the total maximum instantaneous flow is 880-900 m / h, the water temperature is 35-40 DEG C, the supercooling time is 38-42 s, the inlet temperature is 950-970 DEG C, the outlet temperature is 520-580 DEG C, and the cooling speed is 9.25-11.25 DEG C / s. According to the on-line controlled cooling process for the Q345B medium-thick-wall seamless steel pipe, the wall thickness of the medium-thick-wall seamless steel pipe is 12-25 mm, off-line heat treatment is replaced with the on-line controlled cooling process, and the mechanical property required by Q345B is achieved.

The invention provides an X80QS thick-wall seamless pipeline steel pipe and a preparation method thereof, and relates to the technical field of seamless pipeline steel pipe manufacturing. The thick-wall seamless pipeline steel pipe comprises the following chemical components in percentage by mass: 0.08 to 0.12 percent of C, 0.20 to 0.50 percent of Si, 1.00 to 1.40 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.003 percent of S, 0.20 to 0.50 percent of Cr, 0.20 to 0.50 percent of Mo, 0.20 to 0.50 percent of Ni, 0.05 to 0.20 percent of V, 0.01 to 0.05 percent of Nb, less than or equal to 0.05 percent of Cu, less than or equal to 0.040 percent of Al, less than or equal to 0.040 percent of Ti and the balance of iron and inevitable impurity elements. The crack sensitivity index CEPcm of the steel pipe is less than or equal to 0.25%; and the wall thickness of the steel pipe is more than 40mm. The preparation method provided by the invention solves the problem that the core structure of the thick-wall tube is not uniform.

This invention relates to a high-strength and high-toughness forged ring with a large wall thickness of 460MPa or above, its preparation method, and its application. It belongs to the field of forging technology and solves the problems of poor impact toughness in the core of forged rings with a wall thickness ≥100mm in the prior art, and the difficulty in achieving both high strength and excellent welding performance. The method includes the following steps: S1: Billet preparation, selecting a billet with the following chemical composition by weight percentage: C 0.08-0.12%, Si 0.10-0.20%, Mn 1.00-1.20%, Ni 1.0-1.4%, Mo 0.2-0.4%, V 0.02-0.05%, S<0.001%, P<0.006%, with the remainder being Fe and unavoidable impurities; S2: Forging the forged ring, forging the billet into a forged ring of the required size, wherein the wall thickness of the forged ring is ≥100mm; S3: Post-forging pretreatment; S4: Heat treatment, sequentially quenching, two-phase quenching, and tempering of the pretreated forged ring; S5: Finishing. This method enables the preparation of high-strength, high-toughness, thick-walled forged rings for shipbuilding, offshore platforms, or engineering machinery applications.