446results about How to "High forming precision" patented technology

The invention relates to the technical field of skin stretching, in particular to a digital twinning system and method of a skin stretching forming device, and the digital twinning system comprises a physical module, a data processing module and a twinning module, the data processing module comprises a real-time data module and a connection optimization module; the system integrates high-precision simulation, real-time data feedback and an intelligent optimization algorithm, realizes digital mapping and precise regulation and control of the whole forming process of the skin component, remarkably improves the forming precision and the surface quality, accelerates process iteration, and meets the high-standard requirements of aeronautical manufacturing.

The invention relates to multifunctional self-adaptive laser metal 3D printing equipment and a control method thereof.The device comprises a spray head bottom plate and a laser cladding spray head, the laser cladding spray head comprises a spray nozzle used for outputting powder and a pipeline connected to the spray nozzle and used for conveying the powder, and a first converging assembly is installed on the spray head bottom plate; the end, away from the nozzle, of the pipeline is arranged on the inner side of the first gathering assembly, the powder is magnetized when passing through the first gathering assembly in the pipeline, and a gathering processing assembly used for repelling the magnetic powder is arranged on the outer side of the nozzle. Through the design of the first gathering assembly and the gathering processing assembly, powder is magnetized through the first gathering assembly during conveying, then the magnetized powder and the gathering processing assembly generate like-pole repulsion acting force when the powder is sprayed out of the nozzle, the powder is promoted to be gathered together to form a powder beam, powder divergence and irregular arrangement are reduced, and the powder quality is improved. And the position precision and the forming quality and precision of powder conveyed to the molten pool are improved.

The invention discloses a composite positive electrode material, a positive plate and a secondary battery, the composite positive electrode material comprises a composite sodium ferric sulfate material and a carbon-coated ferric sodium pyrophosphate material, the composite sodium ferric sulfate material comprises a first carbon material and sodium ferric sulfate, and the first carbon material and the sodium ferric sulfate are blended; the carbon-coated ferric sodium phosphate pyrophosphate material comprises a second carbon material and ferric sodium phosphate pyrophosphate, and the second carbon material coats the ferric sodium phosphate pyrophosphate; the composite sodium ferric sulfate material is coated with the carbon-coated sodium ferric pyrophosphate material. The composite sodium ferric sulfate material is coated with the carbon-coated sodium ferric pyrophosphate material, so that the high-temperature resistance of the composite positive electrode material can be improved; through the coating effect of the whole carbon-coated ferric pyrophosphate material on the composite sodium ferric sulfate material, the second carbon material can be coated on the composite sodium ferric sulfate material, equivalently, a carbon coating layer is formed on the surface of sodium ferric sulfate, the coating property is good, sodium ion removal is facilitated, and the service life of the composite sodium ferric sulfate material is prolonged. Further, the gram volume and the energy density of the composite positive electrode material are improved.

The invention relates to the technical field of skull repair, and discloses a personalized 3D printing porous composite hydroxyapatite coating skull repair body which comprises a truss structure, a plurality of porous areas are distributed on the truss structure, bionic bone trabecula structures are integrally formed in the porous areas, the truss structure is composed of hollow pipes communicating with one another, and the hollow pipes communicate with one another. A plurality of small holes and micro holes which are communicated with the interior of the hollow pipe are formed in the hollow pipe, and a composite coating of a hydroxyapatite coating and titanium is sprayed on the porous area; the invention provides a personalized 3D printed skull restoration with a porous composite hydroxyapatite coating. The problem that the biocompatibility, the bone induction capability and the bone ingrowth effect of an existing skull restoration need to be improved is solved.

The invention discloses a false tooth support node iterative compensation method based on finite element simulation, and belongs to the field of selective laser melting metal printing. Comprising the following steps: presenting support stress distribution based on commercial finite element simulation software and exporting a deformation result; comparing and outputting a deviation value based on three-dimensional measurement software; carrying out loop iteration on the basis of a node iterative compensation algorithm to obtain a minimum deformation amount; performing slice printing based on an inverse compensation model result; the node iteration algorithm is designed for the problem of false tooth deformation in the prior art, the minimum deviation value can be iterated in a loop mode and reversely loaded to the initial model, and therefore the effect of reducing deformation is achieved.

The invention discloses a method and a system for regulating and controlling melting forming precision of a polymer laser powder bed and a method for improving the forming precision, and belongs to the technical field of additive manufacturing. Comprising the following steps: acquiring temperature distribution data in a polymer LPBF process; constructing a database based on the temperature distribution data and process parameters adopted for printing the current layer; based on machine learning, a polymer LPBF technological process accurate regulation and control model is established; training of the polymer LPBF technological process accurate regulation and control model is completed through the database, the mapping relation of technological parameters, the printing layer thickness and layer-by-layer temperature field distribution is established, a negative feedback mechanism of the technological parameters and the printing layer real-time temperature field is obtained, and accurate regulation and control of polymer laser powder bed fusion forming precision are completed. According to the method, the excellence of the reinforcement learning algorithm in the aspect of big data processing is utilized, the heat accumulation phenomenon in the forming process is improved, the defects of warping, caking and the like are eliminated, and the method has guiding significance for improving the precision and performance of polymer material LPBF process forming parts.

The invention discloses an air bag auxiliary fuselage integral forming method which comprises the following steps: a) designing and manufacturing a mold according to the boundary dimension of a fuselage, unfolding the size and shape of a product by using software, and cutting a carbon fiber prepreg; b) paving prepreg on the machine body lower mold and the machine body upper mold according to the shape, and vacuumizing and pre-compacting; c) after paving, paving an auxiliary material, closing the mold, positioning through a positioning pin and fastening through a bolt; d) after the upper die and the lower die are closed, arranging overlapping edges, placing the air bags, connecting the air bags through vacuum bags, and vacuumizing and pre-compacting again; e) removing the vacuum bag, locking the mold, inflating the air bag and checking the air pressure, and adjusting the air pressure and curing after the air bag is correct; and f) demolding and finishing to obtain a product body. Through uniform expansion of the airframe air bag in the curing process, the carbon fiber prepreg is tightly attached to the shape of the mold, defects such as gaps and bubbles are effectively avoided, and therefore the forming precision of a product is remarkably improved.

The invention discloses a method and a system for optimizing printing parameters of a selective laser melting process. The method comprises the following steps: establishing a geometric model of a target formed part; setting material attributes and boundary conditions, and establishing a three-dimensional finite element model according to the three-dimensional model, the material attributes and the boundary conditions; setting printing parameters; performing thermal analysis on the three-dimensional finite element model according to the printing parameters to obtain a thermal analysis result; performing stress deformation analysis on the three-dimensional finite element model according to a thermal analysis result to obtain a stress deformation distribution result; judging whether the stress deformation distribution result meets a preset condition or not according to the stress deformation distribution result and the preset condition; if yes, the printing parameters corresponding to the stress deformation distribution result meeting the preset condition serve as target printing parameters of the target formed part; and if not, the printing parameters are adjusted until the stress deformation distribution result meets the preset condition. The forming precision of the finally printed target forming part is improved, the operation process is simple, and the cost is low.

According to the system for machining the micro-hemispherical harmonic oscillator based on the carbon dioxide laser, the glass substrate is heated and softened through the carbon dioxide laser, and the energy utilization rate is higher. The horizontal displacement table drives the forming mold to move until the center coincides with the center of a laser spot, so that the positioning accuracy of a processing area is ensured; the diameter of the laser beam is adjusted through the beam expander, it is guaranteed that the diameter of a laser spot is larger than that of the to-be-machined micro-hemispherical harmonic oscillator, and the accuracy of a machining area is guaranteed. The forming mold and the glass substrate are driven to rotate through the rotating table, so that heat distribution of a processing area is relatively balanced, the size deviation of the micro-hemispherical harmonic oscillator caused by unbalanced heat distribution is avoided, and the processing quality of the micro-hemispherical harmonic oscillator is improved. Compared with a traditional method for softening the glass substrate through flame heating, all technological parameters in the machining process can be accurately controlled, the method has the advantages of being easy to operate and high in automation integration degree, and the micro-hemispherical harmonic oscillators high in forming precision and good in batch consistency can be machined.

The invention provides a local loading collaborative additive manufacturing thin-wall reinforced structure forming method and device.The local loading collaborative additive manufacturing thin-wall reinforced structure forming device comprises a shaping die, a multi-axis movement mechanical arm, a heating system, a hydraulic transmission system and a forming monitoring induction system, and the shaping die is connected with the multi-axis movement mechanical arm; the heating system comprises an induction heating element and an electric furnace, the induction heating element is arranged in the shaping die, and the forming monitoring induction system is integrated between the mechanical arm and the die. A detachable sustainable heating mold design and a local loading mode are adopted, an economical and convenient manufacturing method is provided for forming of the complex thin-wall reinforced structure, the forming quality of the thin-wall reinforced structure is improved, and the manufacturing cost is reduced.

The invention provides a U-shaped von Karman variable curvature curve profile frame roll bending forming process. The U-shaped von Karman variable curvature curve profile frame roll bending forming process comprises the following steps that S1, hard material roll bending forming is adopted for raw materials of a U-shaped frame; s2, the blanking size of the U-shaped frame is limited; s3, performing segmentation processing on the U-shaped frame curve by adopting a radius fitting method; s4, roll bending is conducted on the U-shaped frame, and the arc length compensation of each section is prolonged; and S5, different reduction values are added to the radius of each section of each pass of roll bending of the U-shaped frame, and the von Karman curve U-shaped frame is obtained. The von Karman curve variable curvature U-shaped frame has the beneficial effects that a hard material roll bending forming process is adopted to replace a stretch bending forming process, the part forming precision can be improved, the production efficiency is improved, the quenching procedure in the stretch bending forming process is omitted, and the production cost is reduced.

The invention discloses steel for a thin-gauge automobile beam with the tensile strength larger than 510 MPa and a production method of the steel. The steel for the automobile beam comprises, by mass, 0.06%-0.08% of C, 0.03%-0.10% of Si, 0.80%-1.00% of Mn, smaller than or equal to 0.018% of P, smaller than or equal to 0.005% of S, 0.020%-0.045% of Alt, 0.012%-0.022% of Nb, 0.025%-0.037% of Ti, 0.0008%-0.0020% of Ca and the balance Fe and inevitable impurities. The steel for the thin automobile frame has the advantages of high strength, high toughness, high forming precision and the like, meets good matching of strength and forming performance in the performance aspect, is free of cracks in a cold bending test and has good cold machining performance.

The embodiment of the invention provides a forming method of a nanocrystalline special-shaped thin-wall part and the nanocrystalline special-shaped thin-wall part, and relates to the technical field of precision forming. The forming method comprises the steps that a polymer prepolymer and a metal ion solution are mixed, metal ions are made to generate nano conductive particles in situ through a liquid phase reaction, and the nano conductive particles are formed; adding micron conductive particles into the polymer prepolymer containing the nano conductive particles, and performing uniform ultrasonic dispersion to obtain polymer conductive slurry; a curing agent is added into the polymer conductive slurry, the mixture is poured to the surface of the original template after being evenly stirred, demolding is conducted after curing forming, and a polymer core mold with an original template structure is obtained; immersing the polymer core mold serving as a cathode into the electroforming solution, reducing metal ions in the electroforming solution into metal atoms through electrodeposition, and depositing the metal atoms in the core mold cavity until the core mold cavity is fully cast; and the nanocrystalline special-shaped thin-wall part is demolded from the core mold cavity, and the nanocrystalline special-shaped thin-wall part is obtained. The preparation cost can be reduced, and the performance can be improved.

The utility model discloses an automobile gear stamping die with a quick positioning mechanism, which relates to the technical field of automobile gear stamping dies, and comprises a bearing frame, a guide post, a stamping head, a bearing turntable and a driving block, a hydraulic rod and the guide post are arranged above the bearing frame, and the bearing turntable and the stamping head are arranged at the center line position of the bearing frame. A positioning frame is installed above the bearing rotary table, a first positioning claw and a second positioning claw are installed above the positioning frame, a traction connecting rod, a guide rod and a traction sliding block are arranged below the first positioning claw, and a driving connecting rod and a driving block are installed on the left side of the traction sliding block; according to the equipment, the positioning frame is rotationally connected with the second positioning claw at the symmetrical position of the first positioning claw, the effect of rapidly positioning the gear can be achieved through synchronous clamping of four point positions, and the punching precision of the equipment is further guaranteed.

An intelligent plate rolling machine is characterized in that a displacement sensor and a pressure sensor are arranged on a feeding roller and used for recording a displacement pressure curve or a broken line when a pre-bent plate end of an upper roller or a rolled edge is pressed down to a preset position; the method comprises the following steps: actually measuring the plate thickness, recording the plate width, recording a curve or a broken line corresponding to the feeding displacement of a feeding roller and the feeding length of a workpiece plate when a pre-bent plate end or a contact point of a workpiece and a roller surface transits from a flat plate to a bent plate during edge rolling, and actually measuring the straight edge length of the plate end and the prebending or edge rolling forming radius qualification degree of the plate end; recording the data according to part numbers and inputting the data into a data storage unit; the highest qualified degree of the workpiece forming radius is used as a target value, related programs of machine learning are used for learning and training the original related data, and when a new same workpiece is rolled, according to workpiece parameters such as actually measured plate thickness, plate width, a displacement pressure curve or a broken line when a feeding roller enters a preset position and the like, the machining precision of the workpiece is improved. And the initial position parameter of the feeding roller or the feeding displacement feeding length curve or broken line is automatically selected.

The invention discloses an expansion forming method for a socket and spigot type flexible connector steel pipe, and belongs to the technical field of socket and spigot type pipeline forming. The invention discloses a socket and spigot type flexible connector steel pipe expansion forming method. The method comprises the following steps that the end of a steel pipe is treated; one end of the steel pipe is inserted into an expanding mechanism of the expanding device, and the inner die moves outwards to conduct expanding flaring forming on the end of the steel pipe; flattening the flaring end of the steel pipe through a flattening device; a socket end is formed through a socket forming mechanism arranged at one end of the forming device, and a socket end is formed through a socket forming mechanism arranged at the other end of the forming device; and feeding the formed steel pipe into an inspection bench for inspection. By the adoption of the expansion forming method for the socket-and-spigot type flexible connector steel pipe, the problems that an existing socket-and-spigot type flexible connector steel pipe is low in forming efficiency, poor in socket forming quality and prone to cracking can be solved.

The invention belongs to the technical field of steel reinforcement framework machining, and discloses a T-beam web framework single-piece welding device which comprises a pedestal, a first welding mechanism, a second welding mechanism, a third welding mechanism and a clamping mechanism, the pedestal comprises a plurality of positioning groove seats, and the positioning groove seats can be matched with the clamping mechanism to clamp and fix horseshoe long stirrups; the first welding mechanism and the third welding mechanism are arranged on the pedestal in a sliding mode in the first direction, and the second welding mechanism is located between the first welding mechanism and the third welding mechanism and comprises two second welding assemblies moving in the opposite direction or in the opposite direction in the second direction. The first welding mechanism, the second welding mechanism and the third welding mechanism are used for welding all to-be-welded points on horseshoe ribs and long stirrups, automatic welding of T-beam web framework single pieces is achieved, and the welding efficiency and the forming precision are high.

The invention relates to a magnetic field control system and method for a curved surface follow-up additive molten pool, and belongs to the technical field of additive manufacturing. The magnetic field control system for the curved surface follow-up additive molten pool comprises an additive module, an angle calculation module and a control module; the material adding module is used for carrying out shape follow-up material adding on the to-be-welded curved surface; the angle calculation module is used for calculating the rotation angle of the material adding module according to the planned curved surface shape follow-up material adding track; and the control module is used for adjusting the material adding module based on the rotation angle to generate a constant magnetic field, obtaining the reverse Lorentz force of the molten pool in the curved surface shape follow-up material adding process based on the constant magnetic field, and hindering flowing of the molten pool based on the reverse Lorentz force, so that the curved surface forming precision is improved.

The invention provides a roll bending combined die for a carrier rocket special-shaped frame with multiple sections and a using method, the roll bending combined die comprises a middle front roller, a middle rear roller, a side roller, a side pressing wheel and a plurality of roller cushion blocks, the middle front roller is installed on the front side of the middle of the special-shaped frame, and the middle rear roller is installed below the rear side of the middle of the special-shaped frame. Side rollers and side pressing wheels are installed on the two sides of the special-shaped frame respectively, and roller cushion blocks are installed below the middle front roller and the middle rear roller. The method has the beneficial effects that a split combined die structure is adopted for roll bending forming of the profile frame, the number of dies is reduced, the production cost is reduced, and workers can conveniently transport and install the profile frame; the split combined die structure can select whether a cover plate needs to be installed or not according to profile characteristics, friction of a thin area at the top end of a part is reduced, and part forming quality is improved.

The invention discloses a new energy automobile motor iron core high-speed blanking forming precision control method. The control method comprises the following steps that S1, a three-dimensional multi-station iron core progressive die is constructed, wherein the three-dimensional multi-station iron core progressive die comprises the four parts of layout drawing design, die frame guiding, feeding and misfeeding detection and plate pulling and stacking locking; and S2, die blanking, wherein a guide hole forming station, a buckling point forming station, a groove-shaped forming station and a blanking station which are sequentially arranged in the strip advancing direction are included in the forming process. According to the invention, by regulating and controlling the blanking forming process and optimizing the die design, the stability and precision of the motor iron core forming process are improved, edge errors and deformation defects caused by factors such as blanking speed, blank holder force and the like are effectively reduced, and higher production efficiency and product consistency are realized; meanwhile, the technical scheme of the invention has relatively high adaptability, can be widely applied to production of different types of automobile motor iron cores, and provides powerful support for motor manufacturing in the new energy automobile industry.

The invention relates to the field of metal medical implant materials, and discloses a corrosion-resistant and antibacterial magnesium alloy for a bone repair scaffold, a preparation method and application, the corrosion-resistant and antibacterial magnesium alloy for the bone repair scaffold comprises the following components in percentage by mass: 3.5-7.0% of Zn, 0.1-0.5% of Ca, 0.1-0.3% of Al, 0.05-0.1% of Cu and the balance of Mg; the invention further discloses application and a preparation method. According to the method, the corrosion resistance of the magnesium alloy implant can be remarkably improved, and meanwhile the bacteriostatic effect can be effectively achieved; the method has the advantages that individual modeling and forming processing can be conveniently carried out on the implant according to different requirements of different patients on the shape and size of the implant, meanwhile, the treatment time can be greatly shortened, the treatment cost can be greatly reduced, the recovery process of the patients is accelerated, and the method has a very wide application prospect; the laser powder bed melting technology is adopted for preparing the magnesium alloy, the method has the advantages of being short in process, high in forming precision and good in mechanical property, the method is extremely suitable for manufacturing of small-batch complex-structure high-added-value products, and the production cost and time of the complex-structure medical implant are remarkably shortened.

The present invention belongs to the injection production technology field, and discloses a plastic bottle embryo injection molding device, the injection molding device includes a molding mechanism, the molding mechanism includes a fixed mold seat and a movable mold seat; a bottle body module is arranged on the fixed mold seat, a bottle core module and a bottle mouth module are arranged on the movable mold seat; the bottle mouth module contains a thread structure. The separate design of the bottle mouth module and the bottle core module of the injection molding device significantly reduces the demoulding resistance and improves the success rate and efficiency of demoulding; at the same time, the molding of the bottle mouth thread structure is transferred from the bottle body module to the independent bottle mouth module, which not only reduces the wear rate of the bottle body module and prolongs its service life, but also greatly reduces the replacement cost after the thread is worn, because only the bottle mouth module needs to be replaced.

The utility model discloses double-nozzle lithium ion solid-state battery 3D printing equipment which comprises a machine base and a machine frame located on the machine base, a touch screen is arranged on the front face of the machine base, and a first air pressure adjusting knob and a second air pressure adjusting knob are arranged on the two sides of the touch screen respectively. A first extrusion switch and a first pressure gauge are arranged above the first air pressure adjusting knob, a second extrusion switch and a second pressure gauge are arranged above the second air pressure adjusting knob, a vacuum adsorption platform used for laying a current collector is arranged on the top of the machine base, and the machine base is provided with an air pressure control system and a Y-axis movement assembly. A Z-axis movement assembly is arranged on the machine frame, the Z-axis movement assembly is connected with an X-axis movement assembly, and a double-nozzle switching assembly is arranged on the X-axis movement assembly. According to the 3D printing device, 3D printing of the lithium ion solid-state battery is achieved through double-nozzle switching, the manufacturing process is simple and convenient, the forming precision and the forming efficiency are high, development and use of the lithium ion solid-state battery can be improved, and propelling of the solid-state battery is accelerated.

The utility model relates to the technical field of wind power shafts, in particular to a wind power shaft die forging prefabricated blank tool. According to the technical scheme, the wind power shaft die forging prefabricated blank tool comprises a stamping part, a forging stock, a tool body and a base, the tool body is installed in the base, a forming cavity is formed in the tool body, the forging stock is placed in the forming cavity, the stamping part is erected above the tool body, a stamping head is arranged on the stamping part, and the stamping head is connected with the forging stock. The forging stock is machined into a pre-forged piece through extrusion of the stamping piece and the tool body, and a guide hole is stamped in the top end of the pre-forged piece through a stamping head. By means of in-mold prefabrication, pre-forging of shapes including the blind hole in the head and upsetting of the head during finish forging, forming can be achieved, the overall machining allowance is small, and the material utilization rate is high.

The invention discloses an automatic regulation and control side coaming device of a multi-point mold, and relates to the technical field of molds, the automatic regulation and control side coaming device of the multi-point mold comprises a lower mold bottom plate used for bearing a multi-point mold body, the upper end of the lower mold bottom plate is fixedly connected with two fixed outer coamings which are oppositely arranged, and two fixed inner coamings are fixedly arranged between the two fixed outer coamings; the upper end of the lower die bottom plate is further connected with four movable surrounding plate assemblies, and each movable surrounding plate assembly comprises a movable surrounding plate, a base and an electric cylinder push rod. The fixed outer coaming, the fixed inner coaming and the movable coaming assembly abut against the outer side of the multi-point mold body, so that the bending resistance of the multi-point mold body can be enhanced, the usable range of the mold is widened, the forming precision of the mold is improved, and the service life of the mold is prolonged.

The present invention relates to the field of die-casting optimization technology, and discloses a die-casting process parameter optimization method and system based on digital twin. The method includes: arranging sensors to collect die-casting equipment operation parameters and die-casting part quality data in real time to form multi-source die-casting production data. According to the multi-source die-casting production data, establish a multi-physics field simulation model and construct a digital twin model. Compare the virtual prediction results with the measured quality data, and construct a virtual-real difference compensation network to correct the parameters of the digital twin model. Based on the compensated digital twin model, perform a multi-objective reinforcement learning method to generate the optimal die-casting process parameters. Apply the optimal die-casting process parameters to the die-casting equipment for verification, and update the virtual-real difference compensation network according to the verification results. This application realizes the intelligent optimization and continuous self-evolution of die-casting process parameters, and improves the casting forming accuracy, energy efficiency utilization rate and production stability.

The utility model discloses a kind of polytetrafluoroethylene section bar production molds, including upper receiving part and lower forming part, upper receiving part and lower forming part are detachably connected, lower forming part includes cavity part and support part, cavity part is located inside support part and both outer wall and inner wall abut, cavity part and support part are also detachably connected. The mold is designed as detachable structure by upper receiving part and lower forming part, cavity part and support part, realizes the modularization replacement of component, without integral replacement mold can be adapted to different shape or size section bar production, reduce replacement cost and shorten replacement time, while the abutment support of support part to cavity part can effectively reduce cavity deformation in high-pressure moulding process, improve the forming precision and production efficiency of polytetrafluoroethylene section bar, applicable to the production demand of many varieties small batch.

The utility model belongs to the technical field of automobile part casting molds, and provides an integrated semi-solid magnesium alloy high-pressure casting mold for a new energy automobile, which comprises a movable mold assembly, a fixed mold assembly, a sliding block mechanism, a sealing assembly, an exhaust assembly and a pouring system, the sealing assembly is arranged between the movable mold assembly and the fixed mold assembly, a sealing cavity is formed between the movable mold assembly and the fixed mold assembly, a product cavity is further formed between the movable mold assembly and the fixed mold assembly, and the product cavity comprises three cavities used for forming a first main body part, a second main body part and a third main body part respectively; the sliding block mechanism is arranged on the movable mold assembly; the exhaust assembly comprises an exhaust part; the pouring system comprises a pouring gate. Compared with the prior art, the pouring gates are asymmetrically distributed along the product cavity, semi-solid magnesium alloy slurry can be guided to be filled in a stable laminar flow state, air entrapment, turbulent flow and impact are reduced, the defects of cold shut and shrinkage porosity of products are reduced, and the forming precision and mechanical property of the integrated vehicle-mounted decoration plate are improved.

The invention discloses an automatic piston core and sleeve grinding device for a molecular sieve oxygen system, and belongs to the technical field of molecular sieve oxygen production. The grinding assembly comprises a grinding support, a public driving shaft, a transmission gear, a sleeve driving cylinder, a sleeve clamping piece, a piston core driving cylinder, a piston core driving pin, a piston core driving shaft and a piston core positioning shaft, the speed reducer is connected with the public driving shaft, and the public driving shaft is connected with the sleeve driving cylinder and the piston core driving cylinder; a guide groove is formed in the circumferential outer wall of the piston core driving cylinder, the piston core driving pin is arranged in the guide groove, the sleeve driving cylinder is connected with the sleeve clamping piece, and the piston core driving pin is connected with the two piston core positioning shafts through the two piston core driving shafts. According to the automatic grinding device, the automatic grinding function between the piston core and the sleeve is achieved, the grinding quality, the forming precision and the product percent of pass are remarkably improved, and the grinding efficiency and the production efficiency are remarkably improved.

The invention provides a method for photocuring 3D printing of a high-temperature-resistant mold, and the method comprises the following steps: synthesizing high-temperature-resistant photocuring 3D printing resin which comprises the following components in percentage by weight: 50-80% of ethoxylated bisphenol A diacrylate, 15-35% of ethoxylated trimethylolpropane triacrylate, 5-10% of 2, 4, 6-trimethyl-1, 3-pentanediol monoisobutyrate, 5-10% of 2, 4, 6-trimethyl-1, 3-pentanediol monoisobutyrate, 5-10% of 2, 4, 6-trimethyl-1, 3-pentanediol monoisobutyrate, 5 the component A comprises the following components in percentage by weight: 3-10% of 2, 3, 6-trimethylbenzoyl-diphenyl phosphine oxide, 1-5% of filler and 0-2% of auxiliaries; a mold model is constructed through three-dimensional modeling software, and the mold model structurally comprises a conformal cooling water pipeline; slicing processing is conducted on the mold modeling model through slicing software, printing parameters are set, and a slicing file is generated; and the generated slice file is guided into photocuring 3D printing equipment, the high-temperature-resistant photocuring 3D printing resin serves as a 3D printing material, and a high-temperature-resistant mold is formed through the photocuring 3D printing technology. According to the method for photocuring 3D printing of the high-temperature-resistant mold, the high-temperature resistance and the compression resistance of the photocuring 3D printing molding high-temperature-resistant mold can be effectively improved.