44results about How to "Realize one-time forming" patented technology

The invention discloses 3D (3-Dimensional) printing method for preparing a metal matrix composite material, relates to a technique for preparing a fiber reinforced metal matrix composite material by utilizing a 3D printing forming technology, and aims to solve the problems of inflexible lifting and arrangement for guide posts in a flexible guiding three-dimensional weaving technology, high weaving difficulty for the preforms of components in the long-fiber reinforced metal matrix composite material, complicated technology for the permeating preforms of molten metal in the long-fiber reinforced metal matrix composite material, high cost, low rate of finished products and the like. The main method is as follows: various metals and long fibers are taken as raw materials, the guide posts are printed and formed by adopting the 3D printing forming technology in the process of weaving fiber preforms in a three-dimensional mode, and components are prepared in a layer-by-layer weaving and layer-by-layer printing mode. Through the adoption of the method, the fiber weaving of the long-fiber reinforced metal matrix composite material and the permeating forming of the molten metal are integrated, so that the manufacturing efficiency of components is greatly improved.

The invention relates to a preparation method for a metal ceramic composite special-shaped piece, which solves the problems that the connection between ceramic and metal is difficult and a traditional forming technology is difficult to form the metal ceramic composite special-shaped piece. The preparation method includes the following steps: ceramic powder and metal powder are selected, an organic bonding agent is selected, a feeding material is prepared, the prepared feeding material is added to the corresponding part of a forming mould cavity, a special-shaped piece grey blank is formed through pressing in a hot-pressing sintering furnace and is degreased when the indoor temperature reaches 550 DEG C so as to obtain a forming blank material, and then hot-pressing sintering is carried out on the degreased forming blank material so as to obtain the special-shaped piece; the sintering temperature is within 1,000 to 2,000 DEG C, and the pressure is within 20 to 40MPa. The preparation method not only avoids the problems of deformation, joint cracking and the like caused by inconsistent shrinking of metal and ceramic, but also realizes connection between metal and ceramic and the one-time forming of the metal ceramic composite special-shaped piece.

The invention relates to a melt spinning head for a multi-composition hollow fiber composite membrane, which comprises a temperature measurement sensor, a bottom plate, a pressure plate, a cover plate, two gaskets and a heating sleeve, wherein the bottom plate is provided with a joint 1 for receiving fused high polymers, namely a first composition from a first spinning machine; simultaneously the bottom plate is matched with the pressure plate to form a spinning opening 1 which is communicated with the joint 1; the first composition, namely the fused high polymers, is sprayed out from the spinning opening 1 to form an inner layer of the hollow fiber composite membrane; the pressure plate is provided with a joint 2 for receiving fused high polymers, namely a second composition, from a second spinning machine; the pressure plate is matched with the cover plate to form a spinning opening 2 which is communicated with the joint 2; the second composition, namely the fused high polymers, is sprayed out from the spinning opening 2 to from a second layer of the hollow fiber composite membrane; by analogy, the spinning head can form a multi-composition spinning head in a mode of adding more pressure plates; and the whole spinning head is connected by bolts through connecting holes. The spinning head can realize the one-step forming of the hollow fiber composite membrane by multi-composition high polymers, and (two or various) high polymers with different melting points are subjected to membrane wire spinning. Simultaneously, a pedestal and the pressure plate and the pressure plate and the cover plate are matched with each other in virtue of sub-openings to guarantee the concentricity, so that the concentricity of a core bar of the cover plate, the spinning opening 1 and the spinning opening 2 is guaranteed; and the wall thickness of the formed hollow fiber composite membrane is uniform.

The invention discloses a martensite steel 3D free-bending forming device and method and belongs to the technical field of advanced manufacturing and plastic forming. Firstly, based on relative parameters of the forming performance of a pipe material, a corresponding correction factor of the material is obtained through repeated iterative calculation, and an initial model is corrected; after the using situations of parts are tested and calibrated, a three-stage type induction heating device and sensors are matched to achieve precise temperature-control heating; the three-dimensional space of abending mould rotates to extrude the front end of the pipe material to enable the front end of the pipe material to be in a bent shape with the complicated space; and the quenching process is conducted through an annular water-cooling spraying head and accordingly is rapid and uniform. The martensite steel 3D free-bending forming technical problem is solved, and high-temperature free-bending forming under the three-dimensional space is achieved; by means of a rapid quenching system, the strength of 1400 MPa or above is obtained, formation coordinated control of an ultrahigh-strength steel 3Dfree-bending member is achieved; and thus the martensite steel 3D free-bending forming device and method have important engineering application value in the fields of aerospace, rail transportation, automobiles and nuclear power.

The invention discloses a multi-material electric spark processing electrode and a processing method thereof. The multi-material electric spark processing electrode comprises an electrode base and a component electric corrosion material arranged at the bottom of the electrode base; the component electric corrosion material consists of more than one electric corrosion material, the electric corrosion materials have different electric corrosion resistance degrees, and the electric corrosion materials and the electrode base have different electric corrosion resistance degrees; and when the electrode base and a workpiece are connected with the positive electrode and the negative electrode of a pulse power supply respectively, a superfine complex curved surface is formed on the surface of the bottom of the component electric corrosion material. According to the multi-material electric spark processing electrode and the processing method thereof, which are provided by the invention, the superfine complex curved surface is processed by an electric spark forming method, so the problems that the processing efficiency is low, electrodes are changed frequently and a tedious cutter track planning strategy needs to be adopted in the traditional layered milling processing method are avoided; and one-step formation of the complex structure can be realized, secondary clamping errors caused by electrode change are avoided, and high-efficiency forming processing of the superfine complex curved surface is realized accurately.

The invention discloses a USB iron shell mold. The USB iron shell mold includes an upper mold and a lower mold facing the upper mold. The USB iron shell mold includes a first station for adjustment, a first station for forming The second station and the third station for the riveting point, the first station, the second station and the third station are arranged in sequence between the upper mold and the lower mold . The technical effect of the present invention is that it changes the current situation that the traditional USB iron shell mold needs to set the three operations of adjustment, forming and riveting points in three molds respectively, and integrates the three operations of adjustment, forming and riveting points in one mold. station, realizing the one-time forming of the USB iron shell.

Disclosed is a bamboo board circular arc polishing and shaping mechanism. The bamboo board circular arc polishing and shaping mechanism relates to the field of processes of bamboo boards. The bamboo board circular arc polishing and shaping mechanism comprises a base, a rotating cutter shaft and a rotating shaft. The rotating shaft is installed in the center of the base. The rotating cutter shaft is installed on the rotating shaft. A groove is arranged in the rotating cutter shaft. Blades are arranged on the inner wall of the groove. Screw holes are arranged on the rotating cutter shaft. The blades are fixed on the inner wall of the groove through fastening screws. Diameter of the rotating cutter shaft is 1 centimeter-2 centimeters larger than that of the rotating shaft. The bamboo board circular arc polishing and shaping mechanism is of being simple in structure, convenient to operate and capable of achieving shaping and polishing at one time and improving working efficiency.

The invention discloses a forming device and method of a complex inner wall and outer wall cylindrical part. The forming device comprises a concave die separation mechanism, an inner and outer sectiondie separation mechanism and a cylindrical convex die mechanism. The concave die separation mechanism is composed of a multi-section concave die and concave die drive cylinders. The multi-section concave die is of a two-section or four-section vertical symmetric structure, a hydraulic cylinder is used for controlling so that automatic die combining and separation can be achieved, a die cavity inthe shape of the outer wall of the part is arranged in the multi-section concave die. The inner and outer section die separation mechanism is mainly composed of the hydraulic cylinder, inner and outercore shafts and inner and outer section dies, the outer edges of the inner and outer section dies coincide after die separation, and a mold chamber in the shape of the inner wall of the part is formed. The cylindrical convex die moves vertically through the drive cylinder to achieve one-time forming of the cylindrical part in the complex shape. According to the forming device and method, the problems existing to the manufacturing processes of traditional extrusion forming, casting, welding and the like when the part in the complex shape is formed are effectively solved, material consumption is low, cost is saved, and the forming device and method are suitable for large-batch production.

The invention belongs to the technical field of cabin preparation, and particularly relates to a preparation method for changing a titanium alloy into a variable-wall thick hollow active cooling cabinwith an integrated structure function. According to the preparation method, a cylindrical tube blank is prepared by adopting a titanium alloy slab, and superplastic forming / diffusion bonding technology is adopt to form the variable-wall thick hollow active cooling cabin once, a 360-degree rotary cabin body is formed at one time through the method, and a hollow active cooling channel is arranged inside, so that the part forming precision is high, the part integrity is good, and the part structure and the function integration are realized. Due to a hollow sandwich structure, the cooling structure hollow cabin provided by the method is high in strength rigidity and light in weight. Due to the active cooling structure, active cooling can be realized, a coolant can directly use fuel in a fueltank, the overall weight is not increased, the fuel can continue to participate in combustion after cooling, and waste is avoided.

The invention relates to a printing and post-processing method for laser additive manufacturing of 40CrNi2Si2MoVA alloy steel. The method comprises a printing process step, a first heat treatment step, a hot isostatic pressing step and a second heat treatment step. According to the method, novel printing process parameters are developed for the 40CrNi2Si2MoVA alloy steel, the occurrence frequency of printing cracks is effectively reduced, one-time forming of ultra-high-strength steel parts with complex structures is achieved, the follow-up machining allowance is reduced, a development period is shortened, the research and development cost is reduced, and the production requirements of products with complex structures and low demand quantity are met. And meanwhile, on the basis of additive manufacturing, the defects are overcome through hot isostatic pressing and heat treatment methods, and the mechanical property of the material is further improved.

The invention belongs to the technical field of laser welding, and particularly discloses a welding method and system for reducing a laser welding heat affected zone and refining a structure. The method comprises the steps that the surface of a to-be-welded workpiece is pretreated; s2, welding process parameters and working parameters of the conformal condensation plate are set; s3, integrating an ultrasonic generating device, wherein the laser head and the ultrasonic generating device are arranged at an interval; s4, according to the set welding process parameters, the workpiece is welded in the vacuum environment, the laser head moves according to the preset path and speed, the conformal condensation plate works, meanwhile, the ultrasonic generation device is started, and ultrasonic vibration is conducted on a welding seam of the workpiece; and S5, the workpiece is subjected to recrystallization annealing at the specified temperature. According to the method, welding energy distribution is accurately regulated and controlled, meanwhile, the follow-up condensation plate with the self-adaptive temperature adjustment is assisted, follow-up ultrasonic treatment is carried out on a welding seam, then laser welding forming and quality are optimized and regulated, the structure property uniformity is improved, a laser welding heat affected zone is reduced, and the structure is refined.

The invention relates to a large-scale machining method for aluminum alloy empennages, belonging to the field of empennage machining. The machining method for the empennages comprises the steps that firstly, a blank material and a mould are heated to phase-transition temperature of the blank material, and the heat preservation time is more than 2 hours; the aluminum blank material is extruded into an empennage profile material through the extrusion mould; the empennage profile material is an equilateral prismatic barrel-shaped structure with openings at two ends; the length of the prismatic barrel is matched with the multiple of the length of an empennage product; the inner shape and the outer shape of each quadrangular side wall of the prismatic barrel are matched with the shape of the inner side plate surface and the shape of the outer side plate surface of the empennage product; the extruded empennage profile material is subjected to solid solution and aging treatment; and finally, the empennage profile material is machined into empennage finished-products of which the appearances are consistent with the appearance of the empennage product. By adopting the empennage machining method, machining on the empennage profile material is realized; one-step forming of multiple empennage blanks can be realized; the material utilization rate of empennage machining is improved, and machining efficiency is improved; and manufacture cost is lowered.

The invention belongs to the technical field of thin-wall metal component forming and manufacturing, and relates to a method for forming a thin-wall metal component by controlling an inflation position, which can solve the problems that the position of an inflation inlet is fixed, the inflation position cannot be changed, and the temperature field distribution of a plate is unreasonable due to inflation of high-pressure gas in the existing high-temperature air pressure bulging process. The defects of local thinning, cracking, uneven wall thickness distribution and the like occur in the forming process, and for thin-wall metal components with complex structures, flowing of materials cannot be reasonably regulated and controlled in the forming process, the materials cannot be evenly distributed, and the performance of the components is weakened are solved. According to the method, the inflation position is flexibly designed according to the structural characteristics of the complex thin-wall metal component, the purpose of regulating and controlling reasonable distribution of the plate temperature field is achieved, then the plastic deformation degree of different areas of the plate is regulated and controlled, and the problems of serious wall thickness reduction and serious material accumulation during local feature forming are solved; a complex thin-wall metal component can be subjected to multiple times of bulging, flowing of materials is reasonably regulated and controlled, material distribution is adjustable and controllable, and the performance of a bulging part is improved.

The invention discloses an electrode used for an elastic clamping jaw, a machining method and application. The electrode comprises a machining electrode, a connecting electrode which is arranged at the top of the machining electrode and used for connection, and a supporting electrode which is arranged at the bottom of the machining electrode and used for supporting, wherein the machining electrode, the connecting electrode and the supporting electrode are each of a cylindrical structure, the connecting electrode and the supporting electrode are coaxially distributed at two sides of the machining electrode, multiple annularly-distributed electrode teeth are arranged on the outer side face of the machining electrode in the circumferential direction of the machining electrode, and a datum plane is arranged on the connecting electrode. The electrode is used for machining the elastic clamping jaw, a clamping jaw structure with a three-dimensional complex curved surface is machined through an electric spark forming method, one-time forming of the complex structure can be achieved, efficient forming machining of the complex curved surface is more precisely achieved, the workpiece machining efficiency and machining precision are improved, the machining precision of the elastic clamping jaw is reached, the use requirements of a user are met, and the electrode used for the elastic clamping jaw is high in practicability, and is suitable for application and popularization.

The invention discloses a mold structure for spinning forming of a multi-cell superconducting cavity and a moving-out method of the mold structure. The mold structure comprises a core rod and a core mold, the core rod is inserted in the core mold, and the shape of the core mold is matched with the internal structure of the superconducting cavity. The core mold is made of a low-melting-point material, and the low-melting-point material is taken out of a workpiece by heating after forming is completed, so that the problem of taking out the core mold after spinning is solved, the production of the multi-cell superconducting cavity by a spinning process is implemented, and one-step forming of the multi-cell superconducting cavity is realized.