40 results about "Near net shape" patented technology

The utility model relates to the technical field of punch forming, in particular to a silicon carbide ceramic special-shaped part near-net forming device which comprises a seat body, conveying structures are arranged at the left end and the right end of one side of the seat body, a raw material storage structure capable of transversely moving is connected between the two conveying structures, and a forming lower die is arranged below the other side of the seat body. And a supporting frame is fixedly installed over the forming lower mold and fixedly installed at the top of the base body, a driving air cylinder is installed at the top of the supporting frame, and the output end of the bottom of the driving air cylinder is fixedly connected with an upper mold base. And then the solid raw materials are conveyed to the position beside the forming device through the conveying structure, then the storage rack is lifted to a certain height through the lifting air cylinder, meanwhile, the electric push rod is used for driving the material pushing plate to push the solid raw materials to the slope end, and the solid raw materials are conveyed into a forming lower mold through the slope.

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.

The application discloses a kind of flat type semi-solid continuous thixotropic extrusion sleeve forming methods, belong to metal semi-solid forming technical field.It includes the following steps (1) preheating;(2) initial station blank heating;(3) station movement;(4) die closing;(5) die opening;(6) demolding;(7) station repeats;The application is through the cooperation of upper rectangular plate, lower rectangular plate, male die, female die, translation mechanism, upper driving mechanism and lower driving mechanism, realize the thixotropic forming of the embryo in the multiple die holes on female die, extrusion process is stable controllable, semi-solid billet has no spatter risk;Gas inclusions in forming environment are less, can effectively avoid billet oxidation, finally obtain the sleeve parts of organization compact, excellent mechanical properties, improve sleeve forming efficiency and quality, semi-solid extrusion forming belongs to near net shape process, later cutting processing amount reduces by more than 60%, material utilization rate can reach more than 90%, significantly reduce raw material loss.

The invention discloses a composite preparation process of a high-strength aluminum alloy special-shaped ring forge piece, and belongs to the technical field of metal plastic processing and heat treatment. The technology sequentially comprises the steps of multidirectional isothermal forging cogging, intermediate solution treatment, special-shaped preformed blank near-net forming, pulse current auxiliary special-shaped ring rolling and deformation heat treatment. Intermediate solution treatment is introduced to interrupt tissue inheritance, and a uniform fine-grain matrix is obtained; by means of the electroplastic effect of pulse current, efficient near-net forming of the special-shaped section is achieved at the low temperature, and grains are further refined; and finally, through combination of pre-cooling deformation and aging deformation heat treatment, synergistic improvement of strength and toughness is achieved. According to the method, the technical problems that in the preparation process of the high-strength aluminum alloy special-shaped ring forge piece, the structure is uneven, the performance anisotropy is high, special-shaped forming is difficult, and the material utilization rate is low are effectively solved, and a near-net-shape product with excellent comprehensive performance and high size precision can be stably obtained.

The invention discloses a conductor equipment core component cross-scale near-net shape manufacturing method, and relates to the technical field of additive manufacturing, and the conductor equipment core component cross-scale near-net shape manufacturing method comprises the following steps: S1, in a forming process, synchronously executing macro-scale and micro-scale monitoring, and associating two types of data through coordinate calibration to obtain cross-scale associated data; and S2, based on the cross-scale associated data, performing fusion analysis with real-time process and environmental parameters, and outputting a process parameter adjustment direction according to conductor exclusive analysis logic. According to the cross-scale near-net-shape manufacturing method for the core component of the conductor equipment, the overall manufacturing quality and production efficiency of the core component of the conductor equipment can be remarkably improved, the deviation of the size and the organization structure is recognized in real time in the forming process through synchronous monitoring and data fusion of the macroscale and the microscale, and the manufacturing quality of the core component of the conductor equipment is improved. And intelligent analysis is carried out based on the characteristics of the conductor material, and dynamic optimization and closed-loop regulation and control of process parameters are realized.

A dense ceramic body includes a composite microstructure having a first solid phase and a second solid phase. The first solid phase includes cerium oxide with cerium in a Ce(IV) oxidation state, and the second solid phase includes a non-cerium-based oxide. An oxygen ion transport phase is also included, forming a continuous network throughout the body. The composite microstructure is embedded within this continuous network of the oxygen ion transport phase. The first and second solid phases are arranged in a nano-sized, phase-separated morphology.

The invention discloses a laser powder feeding additive manufacturing device and method for an Nb-Si intermetallic compound composite material, and relates to the technical field of high-temperature structural material additive manufacturing. The method solves the problems that according to an existing method for preparing the Nb-Si intermetallic compound composite material through the laser directional energy deposition technology, due to the fact that the local temperature gradient is huge and thermal stress is too high, a formed part is prone to cracking, deformation and composition segregation, and a complete and compact component cannot be obtained. In an inert gas protection environment, dynamic preheating and post-heating heat preservation are carried out on the front area and the rear area of a laser molten pool through combination of overall preheating of a substrate and a local auxiliary heating device synchronously moving with a laser deposition head, and the temperature gradient of a deposition area is strictly controlled to be below a safety threshold value through infrared temperature measurement closed-loop control; and finally, stress release is completed through programmed slow cooling. The method is used for crack-free and high-quality near-net forming manufacturing of Nb-Si-based intermetallic compound composite material components for high-temperature structures in the aerospace field.

A magnet includes a three-dimensional structure with nanoscale features, where the three-dimensional structure has a near net shape corresponding to a predefined shape.

The invention is directed to a method for reducing or eliminating the danger for gross cracking in a hot work tool for high pressure die casting practically eliminates the danger of crack initiation from the inside of the cooling channel by manufacturing a near net shape (NNS) mould for HPDC, wherein the conformal cooling channels are made of stainless steel tubes having a smooth surface. The hot work tool comprises at least one non-liner and / or one conformal cooling channel. The NNS mould is produced by Hot Isostatic Pressing (HIP).

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.

The application discloses an aluminum alloy cylinder additive and subtractive composite manufacturing method, system and equipment, and relates to the technical field of additive and subtractive composite manufacturing. A three-dimensional data model of a ribbed plate aluminum alloy cylinder component is secondarily adjusted to obtain a ribbed plate aluminum alloy cylinder component blank data model; slicing and layering processing is performed to obtain multiple layers of slices; mechanical arm track planning is performed according to the surface structure of any one layer of the multiple layers of slices to obtain mechanical arm additive path planning instructions; the mechanical arm subtractive path planning instructions are obtained according to the surface structure of the ribbed plate aluminum alloy cylinder component blank data model; the ribbed plate aluminum alloy cylinder component additive and subtractive composite manufacturing instructions are obtained; and the ribbed plate aluminum alloy cylinder component is obtained. The application quickly prints an aluminum alloy cylinder blank body in near net shape through additive manufacturing, and precisely processes the ribbed plate area by using a numerical control machine tool subtractive method, so that the size adjustment, surface roughness and other indexes are accurately realized, and the ribbed plate aluminum alloy cylinder component with high precision is rapidly manufactured.

The tubular ribbed reinforced structure prefabricated body comprises a tubular woven layer and x ribs which are integrally woven and formed, the tubular woven layer is formed by interweaving m layers and n columns of woven yarns arranged in the axial direction of the tubular woven layer at a specific weaving angle, and m is a natural number larger than or equal to 1; the x ribs protrude out of the surface of the woven layer, are uniformly distributed in the circumferential direction of the tubular composite material, extend in a linear shape and / or a spiral shape in the axial direction of the tubular composite material and are interwoven with all layers of woven yarns of the woven layer on the extending path, and x is a natural number larger than or equal to 1. According to the method, integral forming and near-net-shape manufacturing of the pipe body and the rib-shaped reinforcing structure can be achieved, the interface problem is eliminated or remarkably weakened, and the structural integrity and reliability are improved.

The invention provides a low-cost target material forming and binding method, which comprises the following steps of: firstly carrying out mould pressing or cold isostatic pressing on powder to obtain blanks, then prefabricating a binding layer on a binding surface of a back plate, prefabricating an isolating layer on the outer surface of a core mould, the inner surface of a sheath and a contact surface between the blanks, combining and welding the blanks, the back plate, the core mould and the sheath, degassing, and carrying out hot isostatic pressing, so as to obtain the low-cost target material. And finally machining to obtain the finished target material. The structure and process design of the invention have the following characteristics: (1) target material forming and binding can be realized at the same time through hot isostatic pressing, and an additional binding process of the target material is avoided; (2) the target blank subjected to hot isostatic pressing tends to be subjected to near-net forming, and the finished target can be obtained only through a small amount of finish machining; and (3) the core mold, the back plate and the sheath can be repeatedly used for multiple times. The production cost can be effectively reduced, and batch production is realized.

The invention relates to the technical field of forging forming, in particular to a forging forming die and a forming method of a wheel carrier forging.The forging forming die comprises a pre-forging die and a finish-forging die, and the pre-forging die comprises a pre-forging upper punch, a pre-forging upper die, a pre-forging lower die and a pre-forging horizontal punch; a cavity formed after the pre-forging upper punch, the pre-forging upper die, the pre-forging lower die and the pre-forging horizontal punch are assembled is used for forming a pre-forged piece consistent with a wheel carrier forged piece in appearance. The finish-forging die comprises a finish-forging upper punch, a finish-forging upper die, a finish-forging lower die and a finish-forging horizontal punch. A cavity formed after the finish-forging upper punch, the finish-forging upper die, the finish-forging lower die and the finish-forging horizontal punch are assembled is used for forming a wheel carrier forge piece. The pre-forging process and the finish-forging process are used for stepped machining, it is ensured that the wheel carrier forge piece reaches the near-net forming state at a time, the forming quality is improved, and the rejection rate of products is reduced.

The invention discloses a die and a process for manufacturing a rectangular wave micro flow channel part of a radiator. The die comprises a first-order shaping die and a second-order backward extrusion die, each of the first-order shaping die and the second-order backward extrusion die comprises an upper die assembly and a lower die assembly; the first-order shaping die further comprises a first-order male die, and the second-order backward extrusion die further comprises a second-order male die. The process comprises the steps of plate punching and blanking, sand blowing, cleaning, lubricating, primary extrusion, secondary extrusion and machining. The die is simple in structure and convenient to use, multiple matching structures are arranged, the machining precision is guaranteed, a high-precision part can be obtained through a material near-net forming machining technology and a small amount of machining, the material utilization rate can reach 89%, and compared with traditional electric spark discharge machining or linear cutting machining which lasts for hundreds of hours, the machining efficiency is greatly improved. The processing efficiency is greatly improved, the production cost is remarkably reduced, and the large-batch order requirements can be met.

Rapidly generated tooling and methods for rapidly generating tooling for composite layup and cure are presented. A foam block is formed into a tool body with a forming surface having a near net shape. A low CTE material is additively deposited onto the forming surface to form a metal cover

The invention discloses a near-net forming die-casting process for an aluminum alloy side cover, and relates to the technical field of die-casting. The method comprises the following steps that a, a die-casting die with a dot-matrix temperature control unit and a conformal cooling water channel is provided; b, an aluminum alloy raw material is smelted and refined, and molten metal liquid is obtained; by adopting the design of combining the multi-stage gradual change type main pouring gate and the fishbone-shaped miniature flow gate network aiming at the mounting lug seat, firstly, the cavity main body is stably filled at low speed and high flow rate, and then the cavity main body is filled by utilizing short-path and high-directionality liquid flow formed by the plurality of miniature flow gates; by means of the structure, the flow direction and distribution of molten metal are fundamentally changed, the problem that the pressure and temperature loss of the tail end of molten metal flow in a traditional single-pouring-gate system is too large is effectively solved, it is ensured that 100% complete filling can also be achieved in the thin-wall area, and the service life of the thin-wall area is prolonged. And the formability of the part is improved, and the cold shut defect is reduced.

The application discloses a sand mold without parting surface and a manufacturing and casting method thereof and a casting, and belongs to the casting technical field. First, a modeling mixture is used to manufacture an integral green sand blank, and the integral sand blank is dried to obtain an integral sand blank, then the integral sand blank is machined based on the idea of subtractive manufacturing, and on the basis, the near net shape is realized to integrally model the sand mold without parting surface, and the casting is carried out by using the sand mold without parting surface to obtain the casting. The application does not need to manufacture a mold sample and a core box, and does not have the assembling process of the parting and the sand mold and the sand core, thereby simplifying the casting process and the mold structure design, avoiding the problems of the size and shape deviation of the casting caused by the assembling dislocation during the molding or the floating of the mold core during the casting. The formed casting has high size precision, accurate shape, high material utilization rate and small subsequent mechanical machining allowance, and the casting production cycle is short and the process yield is high, so that the production cost is greatly reduced. The application is especially suitable for the sand mold casting of the complex and precise casting.

The application discloses a kind of frozen sand mould micro-heat extrusion and numerical control processing near net shape forming method and device, the device uses array module to build sand mould cavity preliminary profile, uses sand box lifting plate to extrude sand mould sand in sand box and form preliminary sand compact, by controlling heating suction sand device to preliminary sand compact is heated slightly to obtain preliminary sand mould, simultaneously, the floating sand generated after being heated is discharged through hollow tube, and further rough machining to the whole sand mould is completed, then the sand mould is moved to numerical control cutting machine to complete the finishing of sand mould whole.The device effectively solves the problem of floating sand accumulation generated in the process of frozen sand mould processing, avoids the long time phenomenon of sand mould numerical control processing, improves the forming precision and surface quality of frozen sand mould, lays a foundation for digital composite processing of frozen sand mould, and promotes the development of frozen sand mould processing to short process, composite and flexibility.

The invention relates to the technical field of annular forge piece manufacturing, in particular to a forging forming device and method for a difficult-to-deform nickel-based superalloy annular piece. The device comprises a base, a carrier roller assembly, a clamping fixture, a driving roller, a pulsation column and a core roller mechanism, the carrier roller assembly is used for supporting and limiting the annular clamping fixture, the clamping fixture is used for clamping and fixing the nickel-based superalloy annular part, and a special-shaped forming cavity used for forming the annular forge piece supporting column is formed in the side wall of the clamping fixture in the radial direction in a penetrating mode; the pulsating column is contained at the outer side end of the supporting column forming cavity and is used for pulsating forging of the ring forging supporting column; the core roller mechanism and the driving roller are located on the inner side and the outer side of the clamping fixture respectively, the driving roller is used for driving the clamping fixture to rotate and providing power for pulsation forging of the pulsation column, the core roller mechanism is used for conducting ring forging on the inner side of the nickel-based high-temperature alloy ring piece, and finally the ring forging piece with the ring forging piece supporting column is obtained. Near-net forming forging of the ring forge piece is achieved, the precision and production efficiency of the forge piece are improved, and the production cost is reduced.

The application discloses a kind of copper-chromium contact wind fire wheel type near net shape forming die, including mould cavity support body, upper punch, lower punch and support core;Mould cavity support body has the mould cavity containing hole vertically through along its axis on it, and multiple arc mouth adaptation convex edges extending in vertical direction are equipped on the inner side wall of mould cavity containing hole;Upper punch lower end is provided with multiple upper punch matching grooves arranged spirally extending around its radial plane;Lower punch is provided with multiple lower punch matching grooves arranged spirally extending around its radial plane on it, and lower punch matching groove is vertically through in lower punch along vertical direction;The mould can realize the integrated near net shape forming of wind fire wheel type copper-chromium contact, and the cooperation structure of the arc mouth adaptation convex edge of mould cavity support body, the upper punch matching groove of upper punch and the lower punch matching groove of lower punch can directly form the continuous spiral groove structure of contact blank body periphery in pressing forming process, simultaneously, the knife edge groove structure of axial penetration is synchronously formed by the knife edge core rod of support core, and the forming of all external features can be completed by single pressing.

This invention relates to the field of vehicle component technology, and in particular to a fully streamlined near-net-shape front axle forging. The fully streamlined near-net-shape front axle forging includes a kingpin, a bend arm, leaf spring seats, and an I-beam. Leaf spring seats are connected to both ends of the I-beam, and the two leaf spring seats are connected to the kingpin via the bend arm. The leaf spring seats have a fully streamlined near-net-shape structure, while the I-beam has an asymmetrical structure. The fully streamlined near-net-shape front axle forging is integrally forged from non-quenched and tempered steel using precision forging. After forging, controlled temperature cooling results in uniform and stable surface hardness, high strength, and minimal deformation. The fully streamlined structure of the front axle forging reduces the size of the leaf spring seats and the weight of the front axle forging. The near-net-shape structure facilitates shorter forging, inspection, and machining processes, improving processing efficiency. Simultaneously, the asymmetrical design of the I-beam contributes to the lightweighting of the front axle forging.

The utility model introduces a kind of spur gear inert gear forging forming die, including upper die assembly, extruding die core subassembly, fine forging die core subassembly and lower die assembly;Extruding die core subassembly and fine forging die core subassembly are alternately arranged between upper die assembly and lower die assembly.The die structure of the utility model can ensure that the part is cold extruded near net shape, shorten the processing cycle, improve production efficiency, improve material utilization, reduce production cost, improve the hardness and tensile strength of the part to improve the mechanical properties of the part itself, solve the problem of once closed die forging spur gear inert gear corner filling after forging, low die life.

The graphite bearing includes: 78 mass% or more and 98 mass% or less of carbon including a carbon component in spheroidal graphite and an uncarbonized resin, 12 mass% or less and 2 mass% or more of a volatile component in the resin, and 10 mass% or less and 0 mass% or more of a component other than the carbon and the volatile component. Further, a total of the carbon, the volatile component, and the component other than the carbon and the volatile component is set to 100 mass%. The graphite bearing can be manufactured by net or near net shape, and does not require a resin impregnation and a metal impregnation or the like. The graphite bearing has less cracks when pressed into a housing, and has high radial strength.

The invention discloses a direct forming method for liquid die forging of a carbon steel valve plate in the technical field of valve plate die forging, and the direct forming method for liquid die forging of the carbon steel valve plate comprises the following steps: S1, pretreatment of a carbon steel raw material: carrying out surface cleaning and drying preheating on the carbon steel raw material at the drying temperature of 200-300 DEG C; s2, metal smelting is conducted, specifically, the pretreated raw materials are added into smelting equipment to be heated to be in a liquid state, and the smelting temperature is controlled to be 1650-1700 DEG C; according to the forming method, molten metal is accurately injected into the specially-made precision mold, extremely high pressure is immediately applied, solidification crystallization and trace plastic deformation of the metal are completed under the pressure, the grain structure is remarkably refined, the mechanical property of the valve plate is close to that of a forged piece, and therefore the valve plate can be manufactured. And meanwhile, complex geometrical characteristics are reserved, near-net forming is achieved, the sealing performance is excellent, the pressure-resistant grade is high, and the service life is prolonged.

Rapidly generated tooling and methods for rapidly generating tooling for composite layup and cure are presented. A foam block is formed into a tool body with a forming surface having a near net shape. A low CTE material is additively deposited onto the forming surface to form a metal cover

The present application relates to a kind of high volume fraction aluminum matrix composite pressureless infiltration near net shape preparation method, belong to metal matrix composite technical field, the present application is according to the demand of composite material service component, design and prepare the special shape ceramic preform of specific outer shape structure, and then realize the near net shape preparation of high volume fraction aluminum matrix composite by pressureless infiltration.While guaranteeing the performance of composite material, obtain aluminum matrix composite near net shape component, subsequent only needs to be a small amount of processing to surface layer can obtain the final required component.The present application method can effectively reduce the loss of raw material and processing tool, reduce the processing cost of composite material, significantly improve processing efficiency and material utilization, realize the goal of cost reduction and efficiency improvement.

The invention discloses a casting ultra-fine grain structure alloy material and a method and application thereof, and belongs to the technical field of metal material casting, and the method comprises the following steps: (1) smelting catalysis: smelting an alloy steel raw material, synchronously applying an axial static magnetic field and electron beam array bombardment, and enabling charged particles in alloy steel liquid to present a spiral motion trail; (2) casting collaboration is conducted, specifically, molten steel is poured into a mold under magnetic field stirring, plasma treatment, ultrasonic treatment and slight vibration; (3) interval shock cooling: after casting is completed, liquid nitrogen is sprayed for shock cooling when the temperature of the mold reaches a preset value; (4) magnetic field heat treatment, wherein two-stage destressing is carried out after the casting is demolded; the first-stage destressing is magnetic-field-free heating, and the second-stage destressing is cooling under the action of a magnetic field; and (5) naturally air-cooling to room temperature. According to the method, ultra-fine grains can be directly obtained in the casting stage, follow-up mechanical deformation is not needed, the grain size is ASTM 13.5 or above, and the method can be used for near-net forming of castings of complex structures.