19 results about "Net shape" patented technology

The present application belongs to the field of copper alloy crystallization wheel preparation, and provides a kind of copper alloy crystallization wheel near net shape manufacturing method, comprising: copper alloy crystallization wheel selects chromium zirconium copper material, each metal material of batching is melted, vacuum centrifugal casting is carried out, and the annular casting blank of crystallization wheel is obtained;The first mechanical processing is carried out to the annular casting blank of crystallization wheel, and the shrinkage and riser of inner ring surface are removed;The annular casting blank of crystallization wheel after mechanical processing is sequentially subjected to hot ring rolling, solid solution heat treatment, cold ring rolling, aging heat treatment, secondary machining, and the present application has the advantages of high material yield, high production efficiency, low production cost, good internal and external performance consistency and high product performance.

A mandrel assembly (100) for net-shape casting of an undercut finocyl grain (133) with aft-end counterbore (140) in a solid propellant rocket case (101) comprising a core (105) capable of forming central cylindrical cavities in the grain and a plurality of fins (106) capable of forming a plurality of forward-swept longitudinal cavities circular patterned around the core. The method of assembling and disassembling the mandrel (100) comprises the acts of hanging the plurality of fins (106) from the core (105) using a fin hanger (107) with a plurality of long and flexible fin cables (108), hoisting the mandrel assembly (100) over the case aft-end aperture (104), bundling the fins (106) and lowering the mandrel assembly (100) inside the case (101), fastening of all the fins (106) to the core (105) and the core (105) to the case (101), inverting the total assembly, casting propellant slurry through case fore-end aperture (103), curing the propellant, inverting the total assembly back, removing core (105) first, assembling fin decoring tool (134) and removing fins (106) one by one, to obtain net-shape cast undercut finocyl grain (133) with aft-end counterbore (140) without employing squeeze casting or propellant machining.

The utility model relates to wood door moistureproof technical field especially wood door filling layer inner moistureproof partition structure, including wood door main part, veneer and handle, the veneer fixed connection is in the outer wall front end of wood door main part, the inside of wood door main part is equipped with diamond net shape filling structure, the inside of wood door main part sets up corner reinforcing structure. This wood door filling layer inner moistureproof partition structure, diamond frame adopts aluminium alloy sheet to form by stamping, drawing, bonding, because diamond frame can directly by rectangular frame extrusion deformation obtains, so production and manufacture and subsequent paste will be more simple than honeycomb structure technology, vertical compression strip and diamond frame are alternately arranged, and the protruding of compression strip side wall is used to balance the force improvement compression resistance of protruding strip at the position of diamond frame both ends narrow, such that the structure that diamond frame, compression strip and protruding strip constitute can realize simple technology also let the compression resistance of hollow place in the middle be improved.

The utility model discloses a kind of release film for polarizing sheet, comprising: substrate layer, its one surface is provided with release layer;Release layer and substrate layer between are provided with repair layer, repair layer and release layer concave-convex cooperation, the other surface of substrate layer is provided with tear-aiding layer, tear-aiding layer is connected with substrate layer by first adhesive layer of point or net shape.The above-mentioned release film structure for polarizing sheet is reasonable, through the repair layer of concave-convex cooperation with release layer, deep or shallow scratch can be repaired in place;Through the tear-aiding layer of first adhesive layer of point or net shape and substrate layer connection, release film is adhered after cutting with product, there is no bonding between tear-aiding layer and substrate layer at cutting edge, and then tear-aiding layer is torn up by pushing, which helps to peel off release film adhered after product.

The present application relates to a kind of regional CORS reference station space layout method, comprising the following steps: (1) reference station overall scale measurement;(2) core station and ordinary station scale measurement;(3) user group activity analysis;(4) based on latitude and longitude grid uniform layout;(5) according to existing CORS site distribution adjustment;(6) regional topography and land class distribution condition analysis, reference station layout adjustment is carried out;(7) infrastructure and key application layout analysis, reference station layout adjustment is carried out;(8) average station spacing statistics and reference station net shape coefficient calculation;(9) whether reference station net shape coefficient meets the predetermined index requirement, yes, then complete layout;No, then return to step (6), repeat step (6) to (8).The site layout of the present application is more scientific and reasonable, can realize the efficient intensive use of CORS reference station resources, meet the high availability, high stability requirement of whole regional space service.

Example approaches are disclosed for manufacturing composite or fiber reinforcement preforms. Liquid, fibrous, binding and potentially other materials are mixed into a composite mixture slurry in a slurry container. A porous tool having a specific porous outer surface portion approximating a specific exterior surface portion of a spatial shape of a final product is immersed in the slurry container. A suction pressure is applied to draw a portion of the fibrous material intermixed with a corresponding portion of the binding material in the slurry onto the specific outer surface portion. The porous tool attached with the wet preform is removed from the slurry container. The wet preform is partially dried into a partially dried preform attached to the porous tool. The partially dried preform is dried, solidified and / or consolidated and / or injected with a resin and cured into a solid composite preform of the spatial shape of the final product.

The present application belongs to the technical field of continuous casting hollow steel and non-ferrous pipe blank, and particularly relates to a direct production of hollow pipe blank near-end type continuous casting system, method and application. The continuous casting system comprises a ladle, a long nozzle, a tundish, a separation ring, a crystallizer, a fan-shaped section, a fan-shaped section driving device, a secondary cooling water nozzle, a casting blank cutting device and a blank discharging equipment. The liquid steel in the tundish passes through a crystallizer with an angle θ with the horizontal plane and forms a certain thickness of primary solidification shell on the surface, and is then pulled out by the fan-shaped section clamping roller obliquely upward. Since the liquid steel of the tundish, the crystallizer and the fan-shaped section are in communication with each other, the liquid steel level does not rise with the rising of the pipe blank. When the height of the pipe blank pulled out obliquely upward is higher than the liquid steel level, only the hollow blank shell with a certain thickness, i.e. the hollow pipe blank, is left in the pipe blank. The hollow pipe blank produced by the present application can be directly applied to actual needs, and can also be used as a raw material for seamless steel pipe rolling production.

A method of making an interconnect for an electrochemical cell column includes casting a metal alloy or a metal matrix composite material to form a near-net-shape interconnect part which includes riser openings, a fuel flow field and an air flow field, and forging the near-net-shape interconnect part to form the interconnect.

The application discloses a hot extrusion forming process of DT300 ultra-high strength steel based on DEFORM-3D finite element simulation, which comprises the following steps: firstly, the material properties of the DT300 steel are researched, and a DEFORM-3D material database is established; secondly, a die and a blank geometric model are constructed by UG modeling, and a finite element analysis model is established; thirdly, forming defects are analyzed after simulation post-processing; fourthly, process parameters are optimized based on the simulation results, core parameters are determined, and the process is implemented to punch a near net shape blank; finally, quality detection and adaptation verification are carried out on the sample. The application utilizes finite element simulation to optimize parameters in advance, predict defects, improve material utilization, shorten the process development cycle, reduce manufacturing cost, and control the wall thickness difference of the prepared parts within 2mm, and the material utilization is improved by more than 1 times. The application solves the problems of low material utilization, long development cycle and insufficient research on the adaptation of the hot extrusion process of the traditional processing technology of the DT300 ultra-high strength steel, and is suitable for the manufacturing of key parts of the DT300 ultra-high strength steel in the fields of aerospace and military industry.

A kind of degradable metal barrier film for alveolar ridge preservation, made of degradable metal, the degradable metal is magnesium-based or zinc-based or molybdenum-based degradable metal material;The degradable metal barrier film is in film or in net shape, the metal barrier film is flat structure or in arched structure.The degradable metal barrier film for alveolar ridge preservation of the application, the degradable metal system (magnesium-based / zinc-based / molybdenum-based) is applied to oral site preservation for the first time, realizes the integration of the triple function of "mechanical support, biodegradation, biological activity".The degradable metal barrier film can be used as the preparation of medical devices for alveolar ridge preservation.

The utility model relates to the field of non - woven fabric technology discloses an agricultural non - woven fabric, two surface layers are fixedly connected with two intermediate reinforcing layers between two surface layers, the inner layer is fixedly connected between two intermediate reinforcing layers, the surface layer is composed of polypropylene staple fiber, polyester staple fiber and polyethylene filament, the polyester staple fiber in the surface layer is distributed in the most outside, the polypropylene staple fiber fills the gap, the polyethylene filament is horizontally interwoven in the net shape, the intermediate reinforcing layer is composed of polyethylene filament and polyester staple fiber, in the intermediate reinforcing layer, the polyethylene filament is in the warp and weft staggered net shape structure. The polyester staple fiber and coating of surface layer promote the anti - stability, the net shape structure of intermediate reinforcing layer and the winding fiber enhance the tensile tear - resistance, the inner layer gives consideration to the ventilation and stability, simultaneously, the surface layer and intermediate reinforcing layer and the inner layer are combined through needle - punching process, can let each layer be firm, promote the anti - stab and tensile performance, can satisfy the agricultural production demand better.

The utility model belongs to the technical field of walking pad, specifically disclose a modular walking pad of quick installation, including gasket main part, the inside longitudinal of gasket main part is provided with warp, and the between horizontal weaving of warp has weft, the upper and lower between warp surface is provided with longitudinal indentation, the left and right between weft surface is provided with horizontal indentation, the between warp and weft forms rectangular groove. This modular walking pad of quick installation is woven with weft between the warp, the specification length of warp and weft are all equal, and the warp and weft are woven into the net shape of interweaving, and a plurality of rectangular grooves are formed between the warp and weft, when the gasket main part is laid on the mountain road, the soil and the stone of ground will be embedded in the rectangular groove, the contact area between the gasket main body and the mountain road is expanded, the shape of the gasket main body is conveniently shaped, the gasket main body is prevented from moving, and the problem of poor gasket adhesion is solved.

The application relates to the technical field of cold bending forming, in particular to an air conditioner valve blade cold bending forming device and a use method thereof. The device comprises guiding and primary forming assemblies, a cutting assembly and a press forming assembly which are sequentially arranged along a raw material processing direction. The guiding and primary forming assemblies comprise a plurality of guiding and clamping roller groups arranged along the processing direction. The cutting assembly comprises a portal frame and a cutter mounted on the portal frame. The press forming assembly comprises at least one cold press die set. The primary forming assembly with the functions of continuous guiding and gradual roller pressing is arranged, integrated and efficient preforming from a rectangular blank to a complex near-net shape is realized. The accurate and highly consistent near-net shape blank formed in the process significantly reduces the deformation difficulty and the waste rate of subsequent final forming. Meanwhile, the modular final forming station which can be flexibly adjusted enhances the adaptability to different specifications of products.

The application provides a hydraulic structure and a construction method, relates to the field of hydraulic engineering building structures, and the hydraulic structure comprises a concrete structure and a corrosion-resistant layer; the corrosion-resistant layer is arranged on a water surface of the concrete structure, and the corrosion-resistant layer is made of a weather-resistant material; the corrosion-resistant layer comprises a plurality of first metal blocks, the plurality of first metal blocks are arranged in an array, the size and shape of each first metal block in the plurality of first metal blocks are matched with a corresponding region of the water surface, and the adjacent first metal blocks are connected through welding; the plurality of first metal blocks are connected with the concrete structure through an adhesive, and the adhesive is distributed in a net shape. The corrosion-resistant layer made of the weather-resistant material is arranged on the water surface of the concrete structure, a first solid barrier is formed, long-term erosion of the water body to the concrete structure is effectively blocked, and the structural durability is improved.

This invention belongs to the field of powder metallurgy hot isostatic pressing technology, specifically relating to a method for evaluating the metallurgical quality of near-net-shape thin-walled complex components formed by powder metallurgy. The technical solution is as follows: A part blank drawing is prepared based on the part design drawing. Then, while maintaining the main shape and key features, the overall dimensions are proportionally reduced to obtain a simulated test piece blank drawing. Finite element simulation is used to perform finite element analysis on the thin-walled complex component and the simulated test piece under the same conditions, establishing quantitative evaluation indicators. Based on the comparative analysis results, the structure of the simulated test piece is optimized iteratively to determine its structure and dimensions. The simulated test piece and the thin-walled complex component are then subjected to powder metallurgy hot isostatic pressing and heat treatment in the same furnace. The microstructure and performance of the simulated test piece are tested according to product acceptance standards to evaluate the metallurgical quality of the thin-walled complex component. This invention can significantly improve the accuracy of quality evaluation and reduce testing costs.

The present application relates to the technical field of metal forging, and particularly relates to a method for regulating metal flow in gear tooth profile forging process, which extracts structure parameters and establishes a response surface model by corner filling length; optimizes and configures die size under the double constraints of load and fullness; and cooperatively regulates multi-stage forging by relying on the taper surface of the optimized die and the split channel, accurately guides the volume distribution and radial flow of the metal, perfectly realizes the synchronous full filling of the upper and lower corner, completely eliminates the risk of press overload, controls the load within the safety line, greatly reduces the subsequent machining allowance, significantly improves the material utilization, and successfully realizes the low-cost, near-net-shape precision die forging manufacturing of large gears.

The present application relates to the field of forging equipment, discloses a power fitting near net shape forming die and a forging method, comprising a machine body and a driving part arranged on the machine body, further comprising: a telescopic cylinder connected with the output end of the driving part; an upper die fixedly installed on the output end of the telescopic cylinder, a punching assembly being arranged in the upper die; a lower die rotatably installed on the machine body, two symmetrical die grooves being arranged in the lower die; when the cylinder body of the telescopic cylinder drops to the first working unit, the upper die and the lower die are closed to perform forging on the blank; the present application adopts integrated design of forging and punching, completes the main body forming and hole processing in the same set of die through two-stage dropping action of the telescopic cylinder, eliminates the process circulation and secondary positioning time, improves the production efficiency and the punching precision; cooperates with the 180° rotation of the double symmetrical die grooves of the lower die and the mounting disc to realize synchronous operation of processing and replacing the blank, eliminates the downtime waiting time, and improves the production efficiency.

The present application belongs to the field of steel material and short process near-net shape manufacturing technology, and relates to a method for producing heat treatment free tool steel for shallow stamping based on thin strip casting and rolling. The production method comprises the following steps: smelting, obtaining 1.5-2.5 mm cast strip through thin strip casting and rolling, single pass hot rolling, air mist cooling to 680-740 DEG C and coiling, and then placing the steel coil in a holding pit for more than 4 hours. The present application utilizes the sub-rapid solidification characteristics of thin strip casting, combines controlled cooling and holding process, and directly obtains a mixed structure containing ferrite, fine lamellar sorbite with a lamellar spacing of 100-160 nm and not less than 30% granular carbide in the hot rolled state, so that the material has high strength and excellent plasticity, and can be directly used for shallow stamping forming without subsequent spheroidizing annealing, thereby greatly shortening the process, reducing energy consumption and cost.

This invention relates to a continuous extrusion process for preparing aluminum-based powder metallurgy materials, comprising: preparing several billets with a first cross-section from aluminum-based powder material by cold isostatic pressing; feeding the billets into the groove of a first continuous extruder in a continuous manner; continuously extruding the billets into a long, continuous intermediate product with a second cross-section; and feeding the intermediate product into a second continuous extruder for secondary continuous extrusion to obtain a product with a third cross-section. This invention utilizes the combined effects of friction and deformation heat during continuous extrusion, as well as the intense shear zone within the deformation zone, to improve the densification and mechanical properties of powder metallurgy products. It balances the densification of powder metallurgy products with the near-net-shape characteristics of powder metallurgy, reduces or avoids reliance on subsequent processing steps, shortens the process flow, lowers costs, and broadens the application scope of powder metallurgy technology.