51results about How to "Realize integrated forming" patented technology

The invention discloses a method for preparing silicon carbide particle-reinforced silicon nitride composite ceramic parts, and belongs to the technical field of ceramic part preparation. The method comprises the following steps of: mixing SiC powder, Si3N4 powder, a sintering acid and a paraffin base multicomponent binder into a uniform feed; and performing solvent-thermal debinding and presintering at the temperature of between 1,150 and 1,200 DEG C on a preformed blank obtained by injection molding of the feed, and sintering in a vacuum carbon tube furnace at the temperature of between 1,800 and 1,900 DEG C and at the normal pressure in the Ar atmosphere to prepare SiCp/Si3N4 composite ceramic parts. The method for preparing the silicon carbide particle-reinforced silicon nitride composite ceramic parts has the advantages of direct preparation of SiCp/Si3N4 composite ceramic products with complicated geometry, uniform texture, high dimensional accuracy and no need of subsequent processing, achievement of integrated molding of the SiCp/Si3N4 materials and the parts, and establishment of low-cost preparation technology for the SiCp/Si3N4 composite ceramic parts with complicated shapes and high dimensional accuracy.

The invention belongs to the field of superalloy additive manufacturing, and particularly relates to a technique for integrally and quickly forming an special-shaped rudder shaft of an aircraft. An overall special-shaped rudder shaft structure formed by selective laser melting fully utilizes the characteristics of high flexibility and rapid response of an additive manufacturing technology. By means of a reasonable process supporting structure and a placement position, the integrated forming of the special-shaped rudder shaft is achieved. A selective laser melting forming process is rapid in solidification, grains of an alloy structure are refined, and the strength and plasticity of parts far exceed a traditional manufacturing process; secondly, the rapid forming method simplifies production process and improves production efficiency. Compared with the traditional manufacturing process, production cycle for rapid forming of the single-piece rudder shaft is shortened by 50%, the utilization rate of materials is increased by 30%, the processing cost is reduced by 30%, and model development demands are effectively ensured.

The invention discloses a TC4 titanium alloy multi-channel valve body laser selective area melting forming method. A multi-channel valve body three-dimensional model is established, manufacturabilitycompensation is added, and the size precision and the shape precision are improved; meanwhile, the valve body character and a complex stress and strain environment formed in the valve body in the forming process are aimed, a stress/strain simulation result is utilized, and the forming direction is determined, a specially-made process support is arranged, alleviating the stress concentration phenomenon is optimized, and machining parameters with the minimum stress strain are selected; and then laser scanning path data of each slice layer are obtained by means of slicing software, and laser selective area melting forming is carried out according to the scanning path data; and finally, after the valve body removes floating powder and is subjected to thermal stress treatment, a substrate plateof the valve body is separated, and the problem that the size precision of the forming valve body is low by utilizing the laser selective area melting forming technology is solved.

The invention belongs to the field of electric arc additive manufacturing, and discloses an electric arc additive and subtractive composite integrated manufacturing method of a thruster model. The method comprises the steps of (a) dividing the thruster model into three parts, slicing and layering the three parts, and planning a filling trajectory of each slicing layer, wherein the slicing directions of a rotor and a stator are along the outer normal direction of a spindle, each slicing layer forms a slicing contour on the spindle, a filling trajectory is planned in each slicing contour, and obtaining the filling trajectory of each slicing layer; (b) molding the spindle; and (c) molding the rotor and the stator. In the project for layer-by-layer processing the slicing layers, the slicing layers are detected in real time through infrared thermography defect detecting and line laser appearance detecting, so that additive and subtractive composite integrated manufacturing is realized. Through the electric arc additive and subtractive composite integrated manufacturing method of the thruster model provided by the invention, the irreversible loss caused since waste products are detectedafter parts are printed is avoided, the energy and raw material consumption is reduced, and the manufacturing period is shortened.

The invention provides an integral spinning forming method for a curved generatrix thin-walled shell with annular reinforcing ribs. A tube blank is machined into the shell through the forming method.The shell comprises a curved generatrix tube section and a straight tube section. The curved generatrix tube section is provided with the annular reinforcing ribs. The forming method comprises the following steps that (1) the tube blank is prepared; (2) stress relief treatment is conducted; (3) power spinning is conducted, specifically, (3.1) the initial spinning position and the final spinning position of the tube blank are determined, (3.2) the number of times of power spinning is determined, and design of a power spinning track is completed, (3.3) the tube blank is mounted, (3.4) a power spinning program based on the power spinning track is designed, and the power spinning program is started for power spinning until the pass of power spinning is completed, and (3.5) the step 3.4 if repeated, after several times of power spinning, the power spinning forming process is completed, and a semi-finished tube blank with stagewise thicknesses is obtained; and (4) closing and spinning are conducted. Through the technical scheme, costs such as mold input and maintenance are greatly reduced, and the production cost is lowered.

The invention relates to a high-temperature alloy rib structure laser solid forming method. According to the method, a rib structure three-dimensional model is constructed, three-dimensional process support is designed according to the place of the rib structure; the model is split, and a cladding control program is programmed. When forming is carried out, cladding forming of the process support part is first carried out on a part on which the rib structure is required to be formed; forming process parameters are adjusted; uniform and stable forming of the rib structure part is carried out; and the process support is removed, such that an integral high-temperature alloy rib structure is obtained. With the method provided by the invention, high-temperature alloy structural parts with rib structures such as lugs and bosses can be integrally manufactured. The invention establishes a basis for realizing engineering in the field of rapid manufacturing.

The invention discloses a method for forming a naked eye three-dimensional display film device through double-sided alignment and relates to the fields of micro machining and image display. The method comprises the following main steps: (1) realizing the preparation for a flexible pressing template with an imaging structure; (2) selecting a base material according to the requirement for a three-dimensional display film device; (3) coating a layer of pressing glue on the surface of the base material, and transferring the structure information on the pressing template to the pressing glue; (4) preparing a layer of colorful material on the other side of the base material; (5) coating a photoresist on the colorful material, performing double-sided alignment exposure on an aligning mark on a mask plate with image information and a mark on a pressing glue structure, utilizing the mask plate to expose the photoresist, and acquiring a photoresist pattern layer through developing and hardening processes; and (6) finally, by adopting an etching mode, etching the pattern layer on the photoresist and transferring to the colorful material layer, thereby forming an integrated three-dimensional display film device.

The invention discloses a material surface micro-nano composite strengthening boiling structure as well as a preparation method and application of the material surface micro-nano composite strengthening boiling structure. The material surface micro-nano composite strengthening boiling structure comprises a base material and a micro-nano composite structure formed on the surface of the base material. The micro-nano composite structure comprises micro mastoids, communication-type grooves and nano-folds, wherein the micro mastoids are formed in the communication-type grooves, and the surfaces ofthe micro mastoids are provided with nano-fold shapes. The preparation method of the material surface micro-nano composite strengthening boiling structure comprises the following step of forming a micro-nano composite strengthening boiling structure on the base material through a laser integrated etching method. The material surface micro-nano composite strengthening boiling structure has multi-scale micron and nanometer characteristics in different levels.

The invention relates to a three-dimensional hollow structure preform and a forming method thereof, and can realize the integrated flexible weaving of the hollow structure preform. The hollow preformcomprises an upper panel, a middle connecting core and a lower panel; the preform can further be composed into a matrix, the matrix comprises a resin base, a metal base, a carbon-ceramic base and thelike; and after the composition of the matrix, a filling core is added to the hollow part, and an integrated hollow composite material can be obtained. According to the three-dimensional hollow structure preform, the upper panel, the connecting core and the lower panel are reinforced by three-dimensional structural fibers, and compared with a traditional hollow structure, the mechanical or adhesive connection is reduced, and the overall structural mechanical property is more excellent; the design is more flexible, shaped preform fibers may be one or more, fiber space structure of the preform may be one or more combinations, and the shaped hollow structure may be dot-matrix type, rib type, ring type, or a combination of several structures; and when used for weaving the integrated hollow structure preform, the method has the advantages of being simple in forming principle and flexible in design.

The invention discloses a high-specific-gravity tungsten-based alloy formation method based on pre-alloyed powder. The high-specific-gravity tungsten-based alloy formation method based on the pre-alloyed powder comprises the steps that firstly, according to the designed ingredients and proportion of the high-specific-gravity tungsten-based alloy, material mixing, pressing, vacuum sintering and forging machining are sequentially conducted, then a tungsten-based alloy rod is obtained, and pre-alloyed powder is obtained through a plasma-rotating electrode powder manufacturing method; secondly, athree-dimensional model of the high-specific-gravity tungsten-based alloy is established, slicing and designing are conducted, and then slice layers and scanning data are obtained; thirdly, with the pre-alloyed powder as the raw material, according to the slice layers and the scanning data, a powder bed type electron beam additive manufacturing forming device is adopted to form the high-specific-gravity tungsten-based alloy. According to the high-specific-gravity tungsten-based alloy formation method based on the pre-alloyed powder, by utilizing the different melting points between tungsten and other elements in the high-specific-gravity tungsten-based alloy, the pre-alloyed powder with tungsten powder particles being wrapped inside low-melting-point element solid solution is prepared, sothat the shells of the pre-alloyed powder are easy to melt and adhere to one another for formation, and therefore the formation difficulty of the pre-alloyed powder is lowered; and with the pre-alloyed powder as the raw material, preparation of the high-specific-gravity tungsten-based alloy is achieved.

The invention relates to an integrated slab micro heat pipe structure and a 3D printing manufacturing method thereof. The method comprises the steps that the first step, area division of the integrated slab micro heat pipe structure is carried out; the second step, 3D printing model processing of the integrated slab micro heat pipe structure is carried out; the third step, the slab micro heat pipestructure is integrally formed through 3D printing; and the fourth step, the 3D-printed integrated slab micro heat pipe structural part is post-processed, so that the manufacturing of an integrated slab micro heat pipe is completed. According to the method, the problems of multiple procedures, long production cycle and high manufacturing cost of a manufacturing method of a traditional slab microheat pipe split structure are solved. The area division, model processing, forming process parameter confirmation and post-processing of the 3D printing integrated slab micro heat pipe structure ensure that the integration of the slab micro heat pipe structure is synchronized formed, so that the production cycle of the slab micro heat pipe is significantly shortened, production costs are reduced,and performance and reliability of the slab micro heat pipe are improved.

The invention discloses an integrated composite progressive forming device and process of a large shell branch pipe flange. The integrated composite progressive forming device comprises a rack, a workbench and a symmetrical tool head system, wherein the workbench is arranged on the rack, and the symmetrical tool head system is connected to the workbench. According to the process, the synchronous movement of a plurality of pairs of tool heads is realized through the symmetrical tool head system, and the integrated forming of a cylindrical part branch pipe flange is realized. The forming processis high in flexibility, suitable for the integrated forming of thick-wall cylindrical part branch pipes with different sizes, and good in universality. Stamping dies and auxiliary feeding mechanismsdo not need to be manufactured, so that the cost is saved. The clamping process is simpler. The forming efficiency can be effectively improved through a multi-point symmetric structure. The stress ofa cylindrical part in the forming process is better balanced. The forming quality is high. Meanwhile, the forming efficiency is effectively improved by the plurality of pairs of tool heads.

The invention provides a method for punching and spinning integrated formation of a filter flange. The method for punching and spinning integrated formation of the filter flange comprises the steps that firstly, a central hole and small holes around the central hole are punched by means of a round plate, and the edge of the central hole is chamfered, so that a blank is obtained; then punching and spinning integrated formation is conducted, the blank is installed on the conical surface of a lower die of punching and spinning integrated equipment, an upper die moves towards the lower die till the upper die and the lower die are completely attached to the blank, and inner hole flanging of the blank is achieved, so that a primary workpiece is obtained; the die assembly position of the upper die and the lower die is not changed, the primary workpiece is clamped, the upper die also serves as a mandrel for spinning formation, the lower die also serves as a spinning tailstock, and multi-pass spinning of the primary workpiece is achieved by means of a spinning wheel, so that a secondary workpiece is obtained; then shape righting is conducted on the secondary workpiece, so that a final workpiece is obtained; and finally, edge cutting is conducted on the final workpiece, so that the filter flange is obtained. By the adoption of the method for punching and spinning integrated formation of the filter flange, the number of sets of dies can be effectively reduced, the formation time is shortened, and production cost is reduced.

The invention discloses a composite multi-material energy field constraint part additive manufacturing device based on surface exposure and a composite multi-material energy field constraint part additive manufacturing method. The energy field constraint part additive manufacturing device adopts surface exposure, and forming of a composite material and embedding of a functional part are achieved through switching of internal stations of the device. After one type of liquid composite material is formed, the material can be formed according to actual requirements, or another station can be switched to form other composite materials, before liquid tanks are switched, a formed part needs to be cleaned and dried, mutual influence between the materials is avoided, the operation is repeated in this way, and finally, additive manufacturing of a composite material energy field constraint part is achieved. According to the energy field constraint part additive manufacturing device using surfaceexposure, by adopting a rotating station with a simple structure, the equipment space is effectively saved, the actions among procedures are coherent, the forming time is saved, the cost is reduced, and the additive manufacturing device has a good application prospect in the energy field constraint part such as a marine sensor and a complex field antenna.

The invention belongs to the field of tactile sensors, and more particularly relates to a nerve-imitating tactile sensor formed based on 4D printing. The nerve-imitating tactile sensor comprises a plurality of sensor units (8), wherein the sensor units (8) are formed through 4D printing; each sensor unit (8) comprises a pressure-sensitive assembly, an electro-shape memory polymer (4) and an energysupply assembly (5); the pressure-sensitive assembly is electrically connected with the electro-shape memory polymer (4) through a wire; and the pressure-sensitive assembly and the electro-shape memory polymer (4) are electrically connected with the energy supply assembly (5) through wires. The sensor is manufactured based on a 4D printing technology, and the unique manufacturing mode of layer-by-layer superposition forming is adopted. Compared with a traditional manufacturing method, the method has the unique advantage in forming any part with a complex structure, can be better applied to the fields of automatic control, soft robots and the like, and has a wide market prospect.

The invention provides a multi-process combined integral forming method for a spherical multi-way part and the spherical multi-way part. The method comprises the following steps: S1, a spinning step: carrying out a spinning process on an original plate blank material to obtain a flat-bottom deep cylindrical part; s2, stress annealing: adopting a stress relief annealing process to eliminate the internal stress of the spun material; s3, hydraulic bulging is conducted, specifically, the annealed flat-bottom deep cylindrical part is subjected to hydraulic bulging treatment, and a spherical part with an opening is obtained; s4, a numerical control hole control step, wherein a plurality of prefabricated holes are machined in the spherical part with the opening at a time through the multi-degree-of-freedom numerical control hole control technology, and the spherical part with the opening and the prefabricated holes is formed; and S5, hole flanging and forming are conducted, specifically, the prefabricated hole obtained after numerical control machining serves as the positioning reference, and the spherical multi-way part is formed through hole flanging. By means of the multi-process combined forming technology, seamless integral forming of the spherical multi-way part is completed in a combined machining mode, the wall thickness is uniform, the product quality consistency and the size precision are improved, and integrated forming of multi-way parts with flanging holes of different specifications and different positions can be achieved.