49results about How to "Guaranteed surface quality" patented technology

The invention relates to the field of material surface treatment and machining, in particular to a method and device for directly preparing a copper alloy coating on the surface of a titanium alloy sealing rod. The process comprises the steps that firstly, cleaning and metal powder drying treatment are conducted on a sealing rod base material, and the base material is clamped on a rotary bearing mechanism in an adjusting box body; sealing the adjusting box body and filling inert gas to replace air until the oxygen content reaches the standard; the laser cladding mechanism is controlled to conduct scanning preheating on the surface of the base material in a non-powder-feeding state; then a powder feeding function is started, spiral high-speed laser cladding is carried out in cooperation with rotation of the base material and axial feeding of the cladding assembly, and closed-loop adjustment of the protective gas flow is carried out in the cladding process; and after cladding is completed, the base material is transferred into the heating furnace body in the box body to be subjected to post-treatment slow cooling, laser scanning preheating and in-furnace slow cooling are combined, atmosphere closed-loop control in a closed environment is matched, and the effect of restraining cracking and oxidation of a titanium alloy cladding layer is achieved.

The utility model relates to the technical field of plastic plate processing equipment discloses a multicolor extrusion device for striped effect plastic plate, and the device comprises a shell, a shell body and a cooling and pressing assembly arranged in the shell, further comprises a water removal assembly, the water removal assembly comprises a fixed plate, a sponge, a chute and a sliding block, the chute is fixed on the shell, the sliding block is fixed on the fixed plate, the sponge is installed on the fixed plate and abuts against the surface of the cooling roller, and the sliding block and the chute constitute a sliding detachable connection, the water removal assembly can effectively absorb the condensed water on the surface of the cooling roller, the surface quality of the plastic plate is ensured, the structure makes the whole assembly be quickly disassembled, the maintenance efficiency of cleaning or replacing the sponge is greatly improved, the continuous production stability of the equipment is enhanced, and the utility model has remarkable practical value.

This utility model relates to the field of metal processing equipment technology, specifically disclosing a clamping device for blanking mold steel, including a base plate, a column, a lifting structure, a lifting plate, a translation structure, a bearing plate, and a clamping structure. A column is fixedly connected to the upper surface of the base plate, and a groove is formed on the side surface of the column. A lifting structure is installed inside the groove on the side surface of the column. A lifting plate is installed on one side of the column, and two grooves are formed on the upper surface of the lifting plate. A translation structure is installed inside the two grooves on the upper surface of the lifting plate. A bearing plate is installed above the translation structure, and an installation groove is formed on the upper surface of the bearing plate. A clamping structure is installed inside the installation groove on the upper surface of the bearing plate. By incorporating the column, lifting structure, lifting plate, and translation structure, the lifting structure drives the lifting plate to precisely adjust its height, and the translation structure enables the bearing plate to achieve horizontal displacement, ensuring that the mold steel is in a precise processing position, effectively improving blanking accuracy and reducing scrap rate.

The utility model relates to the technical field of numerical control machine tool workpiece feeding and discharging, and discloses a numerical control machine tool workpiece feeding and discharging device which comprises a supporting frame, a lifting motor, a bearing device and a pushing device. A bearing device is arranged in the supporting frame and correspondingly connected with the interior of the supporting frame in a sliding fit mode, a pushing device is arranged at the top of the bearing device and fixedly connected with the top of the bearing device through an adaptive screw, and a bottom output shaft of the lifting motor is correspondingly connected with the bearing device in a threaded fit mode. The loading and unloading device is internally provided with the bearing device and the pushing device which cooperate with each other, so that the loading and unloading speed of large workpieces can be greatly improved, manual carrying is reduced, and the safety of the whole operation process is greatly improved.

The utility model discloses a kind of circular non-standard knife holders, belong to oil cylinder production and manufacturing technical field, a kind of circular non-standard knife holder, including knife holder box body, knife holder box body is ladder structure, is successively provided upper ladder surface, side surface and middle ladder surface, the top end between upper ladder surface and the bottom end surface of knife holder box body is provided with vertical installation round hole groove structure, round hole groove and strip-shaped through hole are provided with between middle ladder surface and the bottom end surface of knife holder box body circular through hole, transverse side of knife holder box body is provided with transverse installation round hole groove structure, and circular cutter installation groove is set up on side surface, and circular cutter installation groove is located between upper ladder surface, middle ladder surface.It can improve the cutting position of blade, enhance the utilization of cutting edge, reduce the use cost of scraping and rolling light cutter, improve processing precision and stability, improve the surface finish of workpiece, reduce the loss of wear, while can avoid chip accumulation, ensure processing efficiency and the surface quality of processing product.

The invention discloses an environment-friendly high-performance titanium alloy polishing composition as well as a preparation method and application thereof, and relates to the technical field of metal material surface treatment. According to the environment-friendly high-performance titanium alloy polishing composition, the pH value of a basic system is adjusted to 9.5-10.0 through a pH adjusting agent; the base system comprises the following components in percentage by mass: 10-30% of silica sol, 3-4% of an anti-gel stabilizer (urea or methylurea), 2-3% of a heat transfer improvement and surface defect inhibitor (ethylene glycol or propylene glycol), 0.1-0.2% of a wetting leveling agent, 1-2% of an alcohol amine complexing agent and 0.5-1% of an aminopolycarboxylic acid chelating agent besides water. According to the environment-friendly high-performance titanium alloy polishing composition, on the premise that an oxidizing agent is completely abandoned, perfect balance of high stability, high polishing rate and excellent surface quality is achieved through unique formula design, and the environment-friendly high-performance titanium alloy polishing composition has the advantages of being environmentally friendly and high in safety.

This invention relates to the field of machine tool error compensation technology, and discloses a real-time thermal deformation compensation system and method for machine tool slides and spindle boxes. The system includes: a temperature acquisition module that acquires one-dimensional temperature data of the machine tool and its environment; an image acquisition module that acquires two-dimensional thermal images of the machine tool surface; a data processing module that reduces noise in the data and generates multi-source thermal field data through time stamping and perspective mapping to achieve spatiotemporal alignment; a prediction module that uses a multimodal deep learning algorithm to perform feature fusion calculation and outputs a thermal error prediction vector; and a motion control module that converts the prediction vector into a coordinate correction compensation amount after low-pass filtering and smoothing limiting, and sends it to the CNC system to instruct the feed mechanism to perform reverse displacement compensation. This invention integrates contact and non-contact temperature measurement, supports online fine-tuning to address model error drift, and prevents high-frequency vibration of the CNC feed axis by setting tolerance limits in closed-loop control, thereby improving the machining accuracy and operational stability of the machine tool under complex temperature variations.

This utility model belongs to the field of aluminum disc stamping technology, specifically disclosing an aluminum disc stamping strip correction device, including a base plate, a stamping table connected to the middle of the upper part of the base plate, a support box connected to one side of the base plate corresponding to the side of the stamping table, a hydraulic cylinder connected to the upper part of one side of the support box, a stamping block connected to the lower end of the hydraulic cylinder, a movable support platform connected to one side of the upper part of the base plate, a frame slidably connected to the upper part of the movable support platform, the upper two sides of the frame are inclined, and drive rollers are rotatably connected to the lower parts of the inner walls of the frame. This utility model achieves stable correction of strips of different widths during conveying and stamping through the synergistic effect of an adaptively adjustable strip stabilization mechanism and a multi-directional constraint guide structure, effectively improving the stamping quality and production efficiency of aluminum discs.

The multi-small-disc curved surface single-face polishing machine comprises a machine body, a top plate is fixedly connected to the top of the machine body, two polishing mechanisms are arranged on the top plate, a revolution motor is fixedly connected to the inner bottom of the machine body, and a containing disc is fixedly connected to the tail end of an output shaft of the revolution motor. The top of the containing disc is fixedly connected with three rotation motors, an output shaft of each rotation motor is fixedly connected with a station disc, and the top of each station disc is fixedly connected with a plurality of small discs. According to the utility model, the device is composed of three station discs, and each station disc is provided with eight small discs, so that a plurality of product bodies can be processed at the same time; according to the polishing machine, the polishing wheel can do lifting motion, autorotation motion and horizontal motion, so that a product can be polished more comprehensively and uniformly; according to the placement disc of the polishing machine, under the state that equipment is not stopped, transposition continuous machining of the station disc can be achieved through the revolution motor, and the production efficiency is improved.

The utility model relates to a bending pipe auxiliary tool technical field especially relates to a manual tool for metal conduit big bending radius processing, the utility model discloses disc and rotary support structure are equipped with on the upper portion of bottom plate through shaft A, washer and gasket, and can rotate freely around shaft A, be provided with gyro wheel subassembly on rotary support structure, sliding support subassembly is assembled on the bottom plate, and is located disc one side, and the conduit passes through sliding support subassembly and is supported by sliding support subassembly, and the front end of conduit is placed between disc and gyro wheel subassembly and is clamped by both, and rotates rotary support structure and drives conduit to rotate with disc and completes bending work, the utility model discloses technical scheme solves the problem that the existing bending pipe machine in prior art cannot realize the conduit with too big bending radius, and the bending pipe machine manufacturing cost is high, and the bending pipe object is single.

The application discloses a kind of inclined arrangement tube bundle support strip expansion device and pipe penetrating method of pressurized water reactor passive residual heat removal heat exchanger, the device includes expansion pin, expansion screw, positioning groove plate, nylon top wire and butterfly nut, wherein, positioning groove plate can be fixed in tube bundle support strip expansion pin, by pre-tightening butterfly nut, the expansion screw inside expansion pin moves along the taper hole section inside expansion pin, so that the front end of expansion section is expanded, and the gap L between two adjacent tube bundle support strips is expanded;When the gap L between two tube bundle support strips is reduced after welding with the toothed plate, the installation sequence of the device can be set according to the pipe penetrating sequence, and the gap L between tube bundle support strips is expanded;In the process of expansion, expansion pin does not rub with the semicircular groove of support strip, and does not scratch tube bundle support strip, to ensure the pipe penetrating effect of heat exchange tube.

The invention relates to the technical field of plastic hand bag processing, in particular to a plastic hand bag processing and forming system which comprises a rack, a limiting device, a control table, a printing roller and an ink pool, the limiting device, the control table, the printing roller and the ink pool are installed on the rack, and one fourth of the printing roller is immersed in the ink pool; a mounting plate is fixedly mounted on the side, close to the printing roller, of the control table, a clamp is fixedly mounted on the mounting plate, a doctor blade is mounted in the clamp, and the control table is used for controlling radial movement and angle control of the mounting plate. The splitter plate is an arc-shaped plate, and the thickness of the splitter plate is gradually reduced in the direction close to the printing roller. The ink is shunted through the shunting plate, so that the quality and the speed when the ink impacts the doctor blade are reduced, the impact force on the doctor blade is reduced, and the problem that the doctor blade is excessively impacted by the ink is solved.

This invention relates to the field of dental 3D printing technology, specifically a sub-pixel edge refinement and adaptive slicing method for dental 3D printing. The method includes: calculating the curvature features of a dental 3D mesh model and generating a curvature image; achieving adaptive layer thickness allocation based on surface complexity through dual-threshold segmentation and dynamic programming smoothing; obtaining the initial slicing boundary using inverse ray tracing; performing sub-pixel-level boundary search using the Breaking Ball algorithm; and outputting a high-precision contour through multi-scale, coarse-to-fine refinement; establishing a light source radiation field model and implementing three layers of grayscale compensation: global compensation, extreme value compensation, and edge protection filtering; constructing a multi-objective optimization model; using a non-dominated sorting genetic algorithm to search for the Pareto optimal solution set; selecting the optimal layer thickness sequence based on user weights; and generating G-code printing instructions. This invention achieves synergistic optimization of accuracy, efficiency, and material conservation.

The utility model discloses a wiredrawing mechanism for a copper clad aluminum enameled wire, which comprises a box body, a partition plate is fixedly connected to the middle position in the box body, backflow holes are arranged at two ends of the partition plate, connecting pipes are fixedly connected to two ends of the partition plate, cooling pipes are fixedly mounted at the upper ends of the connecting pipes, and the cooling pipes are fixedly connected to the lower ends of the connecting pipes. Wire drawing dies are rotatably mounted at the two ends of the cooling pipe, driven gears are fixedly connected to one ends of the wire drawing dies, the driven gears are rotatably connected to the two ends of the cooling pipe, mounting frames are fixedly connected to the two ends of the upper surface of the cooling pipe, and rotating shafts are rotatably mounted at one ends of the mounting frames; the two ends of the rotating shaft are rotatably provided with intermediate gears, the intermediate gears are engaged with one sides of the driven gears, and one end of the mounting frame is fixedly provided with a motor, so that the two ends can be synchronously driven for rotation adjustment, the uniformity of wire drawing is improved, the surface quality is ensured, combined use is facilitated, and the adaptability is high.

The utility model relates to the technical field of metal processing, in particular to a metal processing deburring machine tool which comprises a main body, a part moving clamping assembly is fixedly connected to the top of the main body, and a lifting translation assembly is arranged on the side face of the main body. The motor is used for driving the lead screw to rotate, so that the threaded block drives a part clamped at the top of the machining table board to move, high-precision position control can be achieved through the lead screw transmission mode, and the machining precision is improved through the precise thread pitch design and the high-precision lead screw manufacturing process. The position precision of a part in the moving process can be guaranteed, large thrust and large pulling force can be borne through the hydraulic cylinder, a heavy grinding mechanism can be stably moved and positioned, it can be guaranteed that the lifting position of the grinding mechanism is accurate, and the stability of the grinding process and the surface quality of the part can be guaranteed; and meanwhile, proper stroke and thrust of the hydraulic cylinder can be selected according to the size and the shape of the part.

The utility model relates to the technical field of tempered glass, in particular to a flexible shaft bending steel positioning device and flexible shaft bending tempering equipment. The flexible shaft bent steel positioning device is used for being mounted on a feeding mechanism of flexible shaft bending and tempering equipment; the flexible shaft bent steel positioning device comprises a positioning mechanism, wherein the positioning mechanism comprises a base, a graduated scale and a lifter; the graduated scale is installed on the base, the lifter is arranged on the base in a sliding mode, the sliding direction of the lifter is parallel to the length direction of the graduated scale, the length direction of the graduated scale is perpendicular to the conveying direction of the feeding mechanism, and the lifter is used for being connected with the length edge of to-be-machined glass conveyed by the feeding mechanism in an abutting mode. According to the feeding mechanism, the cleanliness of the feeding mechanism can be guaranteed, so that the surface quality of glass is guaranteed, and the operation efficiency is improved.

This utility model discloses a plug, including a plug body, a sealing ring, and a handle. The plug body has an annular groove. The sealing ring is installed in the annular groove and is suitable for sealing contact with the inner wall of the water channel cavity. The handle is detachably connected to the plug body. When the handle is connected to the plug body and the plug body is placed in the water channel cavity, the handle protrudes at least partially from the outlet of the water channel cavity. The handle facilitates the removal and installation of the plug body from the water channel cavity by the operator. After sealing the water channel cavity, removing the handle leaves the plug body and sealing ring in the water channel cavity. While sealing the water channel cavity, there is no interference on the surface of the product to be processed, which affects the tool path during processing. This reduces the difficulty of programming the tool path and improves the processing efficiency of the product to be processed. Furthermore, the sealing ring effectively prevents the chips and waste generated during processing from falling into the water channel cavity, ensuring the surface quality of the water channel cavity and reducing the difficulty of cleaning the product to be processed.

The utility model discloses 3D printing equipment with a multi-nozzle structure, and relates to the technical field of 3D printing equipment. The printing equipment comprises a shell, a printing equipment body is arranged in the shell, a moving frame is arranged on the printing equipment body, and a driving mechanism is installed on the moving frame. When the other spray head assembly needs to be started to work, after the driving mechanism is started, the two connecting frames move upwards and downwards respectively to drive the spray head assemblies installed on the two connecting frames to move reversely, vertical staggered switching movement of the two spray head assemblies is achieved, and then the started spray head assembly moves to a printing station to conduct printing work. Therefore, the risk that when traditional double-nozzle equipment is switched, the bottoms of the two nozzles are located on the same horizontal plane, and a formed printed product is scratched is avoided, it is ensured that the non-working nozzle assembly is always higher than the printing plane, and the problem that when the traditional double-nozzle equipment is switched, a formed part is likely to be scratched is effectively solved.

The invention discloses a method and a system for leveling a coil steel metal plate for frame production. The method comprises the following steps: acquiring initial stress distribution data and thickness deviation data of the coil steel metal plate; on the basis of the initial stress distribution data and the thickness deviation data, personalized leveling process parameters are generated by adopting a finite element analysis model; a plurality of leveling roller sets of the leveling system are controlled according to the personalized leveling process parameters to conduct graded pressurizing and leveling, and meanwhile surface flatness data of the metal plate are collected in real time through a laser displacement sensor; and the flatness data collected in real time is compared with a preset standard, and the pressure, the rotating speed and the interval parameters of the leveling roller set are dynamically adjusted. According to the method, personalized technological parameter generation and dynamic closed-loop control are combined, the problems that a traditional leveling method is poor in adaptability to coil steel metal plates in different states, low in leveling precision and prone to secondary stress damage are solved, the leveling efficiency and the finished product quality are remarkably improved, and the rejection rate of follow-up machining of a vehicle frame is reduced.

The invention belongs to the technical field of intelligent grinding and polishing control, and particularly discloses a layered grinding and polishing process method and system for repairing the damaged surface of an aircraft radome. Comprising the following steps: determining repair boundaries and thickness changes of coatings with different functions in a damaged area of the aircraft radome; a layered grinding and polishing track is planned, and initial process parameters are set for each coating; layered grinding and polishing operation is executed, mechanical parameters, surface parameters and energy parameters are collected in real time in the grinding and polishing process, and an improved layered grinding and polishing contact force model is constructed to conduct local compensation control on grinding and polishing contact force; evaluating the surface quality, the repair integrity and the interlayer consistency of the current grinding and polishing layer in real time; and constructing a multi-target quality evaluation and process parameter collaborative optimization mechanism, and dynamically adjusting subsequent grinding and polishing process parameters according to the deviation between a real-time evaluation result and a preset quality target. According to the method, the material removal accuracy is remarkably improved, the problem of excessive grinding or non-uniform removal is avoided, and it is ensured that the quality of the repaired coating meets the standard.

The utility model provides a kind of equipment for releasing internal stress of aluminium plate, it is related to aluminium plate processing technical field, including equipment main body, fixedly arranged on support surface;Transmission device, the bottom inside equipment main body is arranged, for transmission aluminium plate;Press release device, fixedly arranged in the top inside equipment main body, for the press release internal stress to aluminium plate on transmission device;Two heating devices, install at the top and bottom inside press release device, by setting two heating devices located at the top and bottom of press release device, utilize fan to drive the external air current filtered by filter screen to enter device shell, after being heated by heating pipe, blow to the top and bottom of aluminium plate, realize the even heating of the upper surface and the whole of aluminium plate, effectively solve the problem of uneven temperature distribution and inconsistent internal stress release caused by one-sided or local heating in prior art.

The utility model provides a positioning device for stainless steel calendaring. The positioning device comprises a base; two vertical blocks and a vertical plate are arranged on the two sides of the upper portion of the base respectively, a conveying frame is arranged between the vertical plate and the two vertical blocks, and a conveying belt is arranged above the conveying frame. A lifting frame is arranged on the side, close to the conveying frame, of the vertical plate, a plurality of pressing cylinders are rotationally matched with one side of the lifting frame, and positioning assemblies are arranged between the two sides of the upper portion of the conveying frame and the pressing cylinders. The distance between the positioning plates can be accurately adjusted by rotating the worm to drive the gear and the gear block transmission mechanism, and accurate transverse positioning of stainless steel bands with different widths is achieved. The height of the pressing cylinder can be flexibly adjusted by rotating the screw rod, the pressing cylinder is adaptive to stainless steel bands with different thicknesses, the stainless steel bands are always located at accurate positions in the calendering process, the pressing cylinder can freely rotate in the through groove, sliding friction is replaced by rolling friction when the pressing cylinder is in contact with the stainless steel bands, and scratches to the surfaces of the stainless steel bands are effectively reduced.

The invention discloses a contour path planning method for structural circuit integrated manufacturing, a storage medium and equipment, and the method comprises the steps: importing slice contour data of a structural circuit integrated model, extracting all closed contours of a structural circuit from each layer of slice contour data, and calculating the geometric center of each closed contour; a closed contour tree data structure is constructed according to the contour data of each layer of slices, contour offset is set according to the inclusion relation between closed contours, and a printing filling contour is generated; geometric centers of closed contours in each layer of slice contour data form a node set, and an optimal global contour path printing sequence is determined through a genetic annealing algorithm; according to the optimal global contour path printing sequence, the printing starting point of each closed contour is optimally selected, and an optimal printing starting point set of all the closed contours is obtained; and according to the optimal global contour path printing sequence and the optimal printing starting point set, the movement track of the printing head is determined, and the printing filling contour is printed.

This invention relates to the field of welding technology and discloses a large-size marine suction sail segment assembly and welding equipment and method. The welding equipment includes two sets of corresponding workbenches, each equipped with a clamping mechanism and a first driving mechanism. The first driving mechanism is connected to the clamping mechanism and is used to drive the two clamping mechanisms closer together or further apart. The welding method includes the following steps: Step 1: The sail sleeve is fitted onto the outside of the straightening rod, and then the straightening rod is moved to the middle of the clamping mechanism by the second driving mechanism; Step 2: The clamping mechanism is then moved closer to the sail sleeve by the first driving mechanism. This invention, through the setting of the straightening rod, utilizes the symmetrical structure of the egg-shaped sail sleeve and the characteristic that the center of gravity is located on the vertical line, combined with the point contact design of the arc-shaped top of the straightening rod, to achieve automatic centering and straightening of the sleeve, avoiding positioning deviations caused by human operation errors and providing a stable reference for subsequent welding processes.

The application discloses a rolling mill abnormal vibration early warning method, device, equipment and medium, and belongs to the metallurgical technical field.The method comprises the following steps: obtaining target production data of the rolling mill in each time period, the target production data comprising target vibration acceleration and target process parameters, the target process parameters comprising at least one of target rolling force, target front and rear tension, target rolling speed and target front slip value; determining a production energy value corresponding to the starting moment of each time period according to all the target production data in each time period; the starting moments of different time periods are different, and the production energy value is used for representing the fluctuation degree of the target production data; determining the change rate of the production energy corresponding to each starting moment according to the production energy value corresponding to each starting moment; if the change rate corresponding to any starting moment is greater than a preset rate threshold, early warning of the rolling mill abnormal vibration is performed.The method realizes early warning of the rolling mill vibration, and guarantees the surface quality of the strip.

The utility model discloses a forge piece oxide skin removing device, which relates to the technical field of forge piece oxide skin removing, and comprises a machine body, a motor is arranged on the machine body, the motor is connected with a driving wheel, the driving wheel is connected with a delivery wheel, the delivery wheel is connected with a skin removing mechanism, and a forge piece placing plate is obliquely arranged at the front part of the skin removing mechanism. The peeling mechanism comprises a plurality of roller brushes used for removing oxide skin and an adjusting part used for adjusting the distance between the roller brushes, the adjusting part comprises a sliding groove formed in the machine body, a sliding plate connected with the sliding groove and an adjusting bolt connected with the sliding plate, one end of the adjusting bolt is connected with the machine body, a roller shaft is connected to the sliding plate, and the other end of the adjusting bolt is connected with the machine body. And the roller brush is arranged on the roller shaft. According to the device for removing the oxide skin of the forge piece, the oxide skin of the forge piece can be quickly and efficiently removed, the production efficiency is improved, the surface quality of the forge piece is ensured, the production cost is saved, and the rejection rate of an oxidation pit is reduced.

The application discloses a kind of methods for smelting automobile knuckle steel bar by ecological electric furnace process, belong to special steel field.Its chemical composition is as follows by mass percent:C:0.22%~0.24%, Si:0.25%~0.35%, Mn:0.50%~0.60%, P:≤0.012%, S:≤0.006%, Cr:0.95%~1.05%, Ni:≤0.20%, Mo:0.15%~0.20%, V:0.08%~0.12%, Cu:≤0.10%, the balance is iron and unavoidable impurities;The method comprises ecological electric furnace→LF refining→RH refining→continuous casting→annealing→heating furnace heating→rolling→heat preservation.The application not only guarantees the finished steel mechanical properties and high steel purity of automobile knuckle steel bar and other indexes, but also guarantees the surface quality level of automobile knuckle steel bar.

The invention discloses a low-cost X80 pipeline steel thick plate and an efficient preparation method thereof, and belongs to the technical field of metallurgy. The efficient preparation method comprises the following steps: smelting and heat treatment: smelting according to designed chemical components, continuously casting to obtain a steel billet, and heating the steel billet; non-temperature-holding continuous rolling: carrying out multi-pass non-temperature-holding continuous rolling on the heated steel billet, and carrying out dephosphorization on the plate blank before middle part pass rolling to obtain a steel plate; the cooling speed is controlled, the rolled steel plate is subjected to ultra-fast cooling, and the low-cost X80 pipeline steel thick plate is obtained; the structure is ferrite (15 vol.%-25 vol.%) and bainite, and the average ferrite grain diameter is 4 [mu] m-7.5 [mu] m. Precious metals such as V, Ni and Mo in the steel are omitted, the cost of the X80 pipeline steel is remarkably reduced, the heating temperature of a casting blank is low, and the heating energy consumption is remarkably reduced; and temperature-waiting-free continuous rolling is achieved, and the rolling efficiency is remarkably improved.