148results about How to "Guaranteed forming accuracy" patented technology

The technological process of fast forming precise semi-axle casing with circular rod material heated to forging temperature includes four steps of upsetting, punching hole, perforating and positive extruding. The present invention realizes the fast formation of precise semi-axle casing in only four steps. Combined male die structure is adopted to simplify the technological process of extruding hollow rod, and the present invention has high production efficiency and raised material utilization.

A parametric machining method of air film cooling holes for precision casting turbine blades relates to turbine blades. The method provides errors including casting deformation of components, positioning errors of clamps, and blade movement and deformation during small hole machining so as to achieve parametric accurate machining of hollow turbine blade air film holes. Through solving and calculating propagation and accumulation of error during air film machining, correcting design parameters of air film holes and processing the air film holes according to air film hole shape and location parameters which are the center point of the film hole, the normal of the film hole, and the hole depth of the air film hole after correction, the processing accuracy of the air film holes is increased and the cooling efficiency of turbine blades is increased. This method has important theoretical significance and application value for precise forming of hollow turbine blade, avoids the present situation of air cooling efficiency reduction in the field of air film hole processing, ensures the precision of air film hole forming and achieves the air cooling effect consistent with the design requirements.

The invention discloses wire additive and reductive combination machining equipment. The wire additive and reductive combination machining equipment comprises an on-line metal arc welding wire additive manufacture device and a numerical control multi-axis linkage machining device, wherein the on-line metal arc welding wire additive manufacture device comprises a welding robot and a welder system; the welder system is arranged on the welding robot; the multi-axis linkage machining system comprises a three-dimensional measurement device and a multi-axis linkage precise machining system; the three-dimensional measurement device is used for measuring the outline information of a part and transmits the information to a computer; the computer is used for obtaining the real outline of the part through the received outline information, then compares the real outline with a theoretical three-dimensional model to obtain an error; and the multi-axis linkage precise machining system is used for performing wire reductive machining on the part, so that the error between the real outline and the theoretical three-dimensional model is controlled in a preset range. By adopting the wire additive and reductive combination machining equipment, the problem of a current precise machining method that a part with a complex shape can hardly be machined automatically is solved; and the advantages of arc welding wire additive manufacture of high efficiency, low energy consumption and high environment adaptability can be fully exerted.

The invention relates to a real-time measurement method and device for deformation of a formed part in an additive manufacturing process. The method comprises the steps of: 1, initializing the measurement device; 2, determining the position of a measurement point; 3, starting forming a component on a substrate, starting distance measurement when forming is beyond the position of measurement point and a laser distance measurement instrument is capable of receiving a self-measured light beam signal, and stopping the measurement when part forming is accomplished and the temperature falls below an indoor temperature; 4, obtaining a real-time displacement at the position of the measurement point on the part in the forming process according to distance measurement data of adjacent moments, obtaining a real-time deformation curve at the position of the measurement point in the part additive manufacturing process according to the relationship between the displacement and time; and 5, adopting a plurality of laser distance measurement instruments, carrying out steps from 1 to 4 simultaneously on each laser distance measurement instrument, and performing deformation measurement on a plurality of points on the formed part, thereby obtaining the real-time deformation curve at a position corresponding to each laser distance measurement instrument of the formed part in additive manufacturing process.

The invention discloses an additive manufacturing method. The additive manufacturing method comprises the following steps of slicing, specifically, a three-dimensional model of a component is sliced with the slicing thickness of 10-30 [mu]m; path planning, specifically, a scanning path is planned according to two-dimensional information obtained through slicing; powder laying and printing, specifically, in a shielding gas atmosphere, powder is laid on a substrate, a laser beam is controlled to melt the powder along the planned path, and the powder is laid layer by layer and molten so as to accumulate into the component; and cooling and annealing heat treatment of the printed component. The additive manufacturing method is suitable for a selective laser melting additive manufacturing technique adopting rough granular powder under the condition that the forming quality and performance index of the component are not reduced.

The invention discloses a light spot and powder spot automatic collaboration controlled laser metal added material manufacturing device and a method. The device comprises a connecting joint, a laser focusing head and a sleeve respectively fixed at the upper end and the lower end of the connecting joint, a mobile sleeve slidingly coating the sleeve, a powder feeding nozzle fixed at the lower end of the mobile sleeve, and a numerical control worktable for placing workpieces; the laser focusing head is used for forming light spots on workpiece machined surfaces of a focusing mirror; the powder feeding nozzle is used for gathering powder currents to feed in a machining position to form powder spots on the workpiece machined surfaces; the centers of the light spots and the powder spots are overlapped always; the numerical control worktable is used for driving the workpieces to perform the space movement corresponding to the focusing mirror to control the out-of-focus distance; and a driving device is arranged on the mobile sleeve for driving the powder feeding nozzle to move up and down through the mobile sleeve to control the sizes of the powder spots. When the method forms thick and large workpieces with the cladding layer sizes exceeding the adjusting range, the profile scanning and filling scanning combined path formation is adopted.

Disclosed is an incremental bending and forming method of a hat-shaped member. Complex hat-shaped member with multi-arcs is formed through a simple mold matching with a plant bending machine. The method includes unfolding each arc of the complex hat-shaped member with the multi-arcs into a plane to determine the size of the plane blank; establishing a three-dimensional model according to the size of the plane blank, and dividing areas by adopting arcs as standards; performing numerical simulation on the forming process complex hat-shaped member with the multi-arcs, incremental bending arcs on two sides, then bending a central arcs, and finally bending boundaries of the areas; determining feeding amount of the plate blanks and downward punching amount of each step during the bending process according to the simulation result. By the aid of the method, the thickness of each part of a formed hat-shaped member is consistent basically, and surface quality and forming accuracy of the formed member can be guaranteed well; the process of controlling deformation is simple, and the method has the advantages of low cost and short period.

The invention relates to an integrated stamping forming treatment method of steel in the metal hot processing field. The method comprises the following steps of: selecting and preparing steel billets; hot stamping; controlling the quenching cooling at suspension cooling temperature; carrying out secondary heating treatment on the cooled steel billets, and then cooling to tempering temperature; and fine stamping and forming while the billets are hot. In the invention, hot stamping forming and heat treatment austenite heating are combined into a whole, thus the energy is saved, and the toughness and the precise plasticity forming of the steel are enhanced. The tensile strength of the treated steel is larger than 1,900MPa.

The invention discloses a method and a device for forming plates through gradual approximation bending on a three-dimensional numerical control plate bending machine (1). The method comprises the following steps of: performing targeted iteration gradual approximation bending by utilizing a resilience rule of a plate (5), comparing a shape of an actually formed curved surface B of the plate (5) subjected to pressing resilience with a shape of a theoretical target curved surface S through online measurement, and setting an approximation bending pressing curved surface C for limited approximation pressing according to an error offset value h after resilience. By the device, an online laser three-dimensional coordinate measuring instrument (4) connected with a computer is arranged on the three-dimensional numerical control plate bending machine (1). Complex mechanical calculation is not needed, the problem of bending resilience of a ship plate can be rapidly solved on line in real time, as long as the approximation bending pressing is performed for 1 to 3 times generally, the requirement on machining accuracy can be met, the problem of resilience of a numerically controlled bent plate is rapidly and effectively solved, the forming accuracy of a three-dimensional curved surface ship plate is guaranteed, and the method and the device have simple and rapid effects.

The invention is applicable to the technical field of panel processing, and provides a high-pressure water jet tilting and rotating device which is connected with a high-pressure water pump and is capable of jetting high pressure water generated by the high-pressure water pump according to specified directions and positions. The high-pressure water jet tilting and rotating device comprises a slide plate, a water jetting mechanism, a rotating mechanism and a tilting mechanism; the water jetting mechanism comprises a water gun and a high-pressure hose, wherein the water gun is used for jetting high pressure water column, one end of the high-pressure hose is connected with the water gun, and the other end of the high-pressure hose is connected with the high-pressure water pump; the rotating mechanism, which is arranged on the slide plate, comprises a rotating shaft and an electric motor, wherein the rotating shaft is connected with the high-pressure hose and is arranged alternately with the water gun, and the electric motor drives the rotating shaft to move; and the tilting mechanism is fixedly connected with the rotating shaft and drives the water gun to be inclined to the axial direction of the rotating shaft. The slide plate is used for adjusting the position and angle of the high-pressure water jet tilting and rotating device, so that the position and the angle of the water gun can be flexibly adjusted. During the working process of the high-pressure water jet tilting and rotating device, the high-pressure water column sprayed by the water gun is substantially perpendicular to the surface of a workpiece, so as to ensure the forming efficiency and accuracy.

The invention discloses a precise micro-forming device and a method thereof based on a laser continuous stamping plasticine technology. The device comprises a laser loading system, a plastic forming system and a computer control system. The laser loading system comprises a nanosecond laser, a reflection mirror and a focusing lens. The plastic forming system comprises a sample system, a clamp body, a three-dimensional moving platform and a base. The computer control system comprises a three-dimensional moving platform controller, a laser controller and a computer. According to the device and the method, plasticine is used for transmitting impact force, in a multi-time impact process, the plasticine and a workpiece are attached together gradually, stress on the workpiece is even, scratching cannot happen, surface quality of the workpiece is improved, and meanwhile according to the characteristic that the plasticine deforms in an plastic mode after being stressed, the workpiece and a micro mould can be attached with each other, rebounding of the workpiece is avoided, and forming precision of the workpiece is guaranteed.

The invention discloses a process for preparing a guide vane by selective laser melting. The process comprises the following steps that S1, when a guide blade is placed, the powder laying direction ofa scraper is selected, the included angle between the upper end face and the lower end face of the guide blade and the X-Y horizontal plane is larger than 30 degrees, the distance between the guide blade and a base plate is kept 3-5 mm, a part is suspended in the air in a supporting mode, and after printing forming, the part is separated from the base plate through linear cutting; S2, model processing is performed on the guide vane by adopting a mode of combining blocky support and conical support; S3, a scanning strategy in a checkerboard mode is adopted, and regional bounce sintering is carried out; S4, process parameters are set; and S5, heat treatment is conducted, specifically, under the high-vacuum-degree condition, the temperature is increased to 1180 DEG C, heat preservation is conducted for one hour, and argon rapid cooling is conducted; and S6, surface treatment is conducted, specifically, after the part is printed and formed, the supporting part is removed. According to theinvention, the high-quality 3D printing high-temperature alloy guide blade formed through selective laser melting can be prepared, and the mechanical property, the surface quality and the forming precision are guaranteed.

The invention discloses a hot isostatic pressure near-net forming method for a semi-solid complex difficult-machining compact piece. The hot isostatic pressure near-net forming method comprises the steps that a semi-solid material is used as a forming material, graphite is used as an internal form control core, the hot isostatic pressure temperature is selected as the solid-liquid two-phase interval temperature, and the compact piece in a complex shape is directly formed under coupling of temperature and pressure. According to the hot isostatic pressure near-net forming method for the semi-solid complex difficult-machining compact piece, performance defects caused by powder surface pollutants in traditional methods can be effectively overcome, and the part forming precision can be effectively ensured through high pressure at the high temperature; in addition, the temperature close to the melting point of an alloy material is adopted, and a solid-liquid coexisting phase occurs in a ladle sleeve at the temperature; due to the fact that liquid phase components exist among crystal grains or solid phase particles, the solid phase particles almost have no binding force and are very low in flow deformation resistance, and a complex runner in the form control core is filled with parent metal advantageously; and moreover, the solid phase particles are easy to separate on specification portions, and while, due to the fact that the liquid phase components exist, the separated portions are very easy to connect integrally.

The invention discloses a laser additive manufacturing device and method. The laser additive manufacturing device comprises a forming cabin, a working platform, a substrate, a scanning galvanometer assembly, a powder presetting assembly, an atmosphere regulating assembly, a lifting assembly and a central control system; when the laser additive manufacturing device is applied to the forming of a metal component, the scanning galvanometer assembly is not only used for the layer-by-layer selective melting of slice layers of the metal components above the fixedly-positioned substrate, but also used for the layer-by-layer selective melting of enclosed thin walls above the substrate; and the enclose thin walls are matched with the slice outline of the metal component, and capable of accommodating a metal powder bed. The laser additive manufacturing device and method disclosed by the invention have the advantages that the forming space is flexible and adjustable as well as the powder utilization ratio is high; and the high-quality low-cost additive manufacturing of metal components of various sizes and shapes can be achieved.

The invention discloses a method for testing laser metal direct forming based on self-healing mechanism, which is to carry out laser single-path metal forming tests under the conditions of different powder defocusing amounts respectively by adopting the same basic process parameter so as to obtain a variation law of the section thickness of single-path metal forming under the conditions of different powder defocusing amounts. The self-healing mechanism existing under the condition of powder negative defocusing by analyzing the law, can automatically eliminate a phenomenon of a rough forming surface caused by unstable process in a forming process along with performance of forming, thereby ensuring stable performance of the forming process. By applying the self-healing effect generated by powder negative defocusing, high-quality deposition forming of a complicated thin-walled component can be realized under an open-loop control system.

The invention provides a dot-matrix powder spreading 3D (three-dimensional) printing device and a dot-matrix powder spreading 3D printing method based on resistance heating. The dot-matrix powder spreading 3D printing device comprises a sealed housing, a feeding port, a hydraulic lifting frame, a dot-matrix resistance heating plate, a powder feeding device, a movable support, a powder spreading device, a powder bed device, a printing base platform, a dummy plate, a lifter and a stepping motor. The dot-matrix powder spreading 3D printing device adopts a mode based on the resistance heating, andadopts a rasterization method to achieve material additive manufacturing printing, and in other words, after space lattice slicing partition is performed on a 3D part, a surface is first partitionedinto array dots, a powder area to be printed on the powder bed on the base platform is heated to melt or sintered so as to achieve face shaping according to each single layer slice of the 3D part, andthen direct shaping is achieved through gradual layer stacking. The dot-matrix powder spreading 3D printing device and the dot-matrix powder spreading 3D printing method based on the resistance heating have the advantages of being low in production cost and high in production efficiency, and shortening a period of preparing the part through powder spreading printing.

The invention provides a forming method of a flange ring for an automobile tail gas recycling device. By combining necking in spindown with reducing spinning, a tube billet can be directly formed to obtain the flange ring for the automobile tail gas recycling device, so the surface quality and integral mechanical property of the flange ring are improved; meanwhile, the productivity and the utilization rate of materials are improved.

The invention discloses a forming mold and method for an ultra-fine grain hollow magnesium alloy profile. The forming mold comprises a base, a concave die outer sleeve, a concave die inner sleeve, an extruding needle, an extruding shaft and an extruding pad, wherein the concave die inner sleeve is provided with a forming concave die. The forming method the following steps: (1) fixedly connecting the extruding pin and the extruding shaft with an inner sliding block and an outer sliding block of a double-acting extruding machine; (2) heating an ultra-fine grain hollow cylinder blank above a re-crystallization temperature; (3) putting the heated blank into a feeding section of the forming concave die; (4) starting the double-acting extruding machine to position the extruding needle, and pushing the extruding shaft and the extruding pad through the outer sliding block to extrude the blank; and (5) finally forming a tubular product by virtue of the extrusion of the outer sliding block of the extruding machine. According to the forming mold and method, the continuous plasticity of the magnesium alloy tubular product in the machining process can be effectively improved, the mechanical property can be enhanced, and the large-batch production machining can be realized.

The invention belongs to the field of additive manufacturing, and discloses an electric arc fused additive manufacturing method for a multidirectional steel connection. The method comprises the following steps of S1, performing three-dimensional modeling on the multidirectional steel connection to obtain a main pipe model and all branch pipe models of the multidirectional steel connection; S2, planning a stacking path of the main pipe model in a manner of equal-thickness hierarchy planar slicing and equidistant biased filling, and generating a corresponding motion command according to the stacking path; S3, planning a stacking path of each branch pipe model in the manner of equal-thickness hierarchy planar slicing and equidistant biased filling, and generating corresponding motion commandsaccording to the stacking paths; and S4, controlling electric arc fused additive manufacturing equipment to perform main pipe forming according to the stacking path of the main pipe model, and controlling the electric arc fuse additive manufacturing equipment according to the motion commands of the stacking paths of all the branch pipe models to manufacture all branch pipes on a main pipe. The method avoids the defects that the shrinkage cavity defect and the shrinkage porosity defect are liable to generate during monoblock casting, weldability is poor during welding, and the like, and overcomes the problem that curved surface forming is hard to directly realize by an electric arc fused additive manufacturing technology, and the like.

The invention discloses a control method, a system and a device for electric arc additive manufacturing. The method comprises the following steps that after a three-dimensional physical model of partsneeding to be welded is obtained, slicing processing is carried out on the three-dimensional physical model from the bottom to the top, and a plurality of plane models are obtained; the contour information is obtained according to the plane models, and a motion curve is obtained according to the contour information; welding points of a welding gun on the motion curve are obtained in combination with a motion curve and a preset mode, and a movement path of the welding gun is acquired according to the welding points; the movement path, and the posture parameters of the welding points and the welding gun are combined to acquire the posture information of the welding gun at each welding point; and the welding gun is controlled to be welded through combining the movement path, the welding points and the posture information of all the plane models in sequence, and corresponding welding layers are obtained from the bottom to the top until the welding is finished. According to the control method, the system and the device, the welding gun can automatically weld some complex curved parts, so that the welding quality is improved, and the method can be widely applied to the field of additivemanufacturing.

The invention belongs to the technical field related to additive manufacturing, and discloses an additive manufacturing method. The additive manufacturing method includes the following steps that (1)an additive manufacturing device is provided, wherein the device includes a laser device and a beam split scanning component which are opposite to each other, the laser device emits a laser beam to the beam split scanning component, the beam split scanning component divides the laser beam into two laser beams including a first laser beam and a second laser beam with different energies, and the power of the first laser beam is smaller than that of the second laser beam; and (2) the first laser beam preheats powder on a device or performs scanning machining on the contour of to-be-formed parts,and the second laser beam performs melt scanning forming on the preheated powder or performs melt scanning forming on powder in the contour, and then processing of the to-be-formed parts is completed.By means of the additive manufacturing method, through cooperative work of the low-power laser beam and the high-power laser beam, the forming accuracy, the surface quality and the forming efficiencyare improved, and the microstructure and mechanical properties are improved.

The invention discloses a device for performing double curvature sheet bending and forming by utilizing an electronic universal testing machine and relates to a sheet bending and forming device for solving the problem that the curvature precision requirement of a forming part is difficultly guaranteed in a conventional double curvature part forming technology. A female die is arranged in a female die straight slot; a double curvature arc groove is formed in an upper end face of the female die; the double curvature arc groove is provided with a transverse arc groove along the transverse direction and is also provided with a longitudinal arc groove along the longitudinal direction; inclined holes are symmetrically formed in a side face of the female die which corresponds to the longitudinal arc groove; a double curvature arc surface is arranged on a lower end face of a male die; the double curvature arc surface is provided with a transverse arc surface with the same radian as that of the transverse arc groove along the transverse direction and is also provided with a longitudinal arc surface with the same radian as that of the longitudinal arc groove along the longitudinal direction; an upper nut is in threaded connection with an upper connecting bolt; a lower nut is in threaded connection with a lower connecting bolt; and the double curvature arc surface of the male die is arranged in the double curvature arc groove. The device is used for double curvature metal sheet bending and forming.

A glass molding machine includes a shaping die, a temperature controller, a die assembling state, a glass molding stage and a die disassembling stage. The shaping die includes a first, second and body molds. The die assembling stage feeds a glass material to the first mold with the body mold being fitted to the exterior of the first mold. The die assembling stage fits the second mold to the body mold to assemble the shaping die. The glass molding stage heats and molds the glass material. The die disassembling stage removes the second mold from the body mold after the molding, to remove the molded glass product. The temperature controller provides a temperature difference so that a temperature of the body mold is higher than a temperature of the second mold in the die assembling stage and in the die disassembling stage.

The invention provides an additive manufacturing device. The additive manufacturing device comprises a vacuum forming cavity, a powder bed, a lifting mechanism, a powder supply mechanism and an electronic gun, wherein the powder bed, the lifting mechanism and the powder supply mechanism are arranged in the vacuum forming cavity, and the electronic gun is arranged above the vacuum forming cavity. The electronic gun is provided with a plurality of electron beam emitting units distributed in an array mode. The powder bed is connected to the lifting mechanism. The lifting mechanism drives the powder bed to precisely go up and down and to be precisely positioned. The powder supply mechanism supplies and lays powder on the powder bed. Electron beams emitted by the electron beam emitting units conduct precise melting scanning forming on the powder laid on the powder bed. According to the additive manufacturing device, the electronic gun provided with the electron beam emitting units distributed in the array mode is used, the electron beam emitting units with different array positions are controlled to conduct precise scanning forming on different areas of the powder bed, the beam current quality of the electron beams can be ensured, and the electron beams are correspondingly responsible for each area, so that all the areas are effectively linked up, and a large-size part is rapidly manufactured on the premise that the part forming precision and quality are ensured. In addition, an additive manufacturing method provided by the invention is easy to operate and achieve.

The invention relates to a manufacturing method of an aero-engine composite material fan blade metal stiffened edge. The manufacturing method of the aero-engine composite material fan blade metal stiffened edge mainly comprises the steps that diffusion bonding is carried out on a prefabricated piece through a sealing structure to obtain a hollow structure, and finally, the metal stiffened edge isisolated in an edge trimming separation mode. A core model is adopted to support a cavity in the process of diffusion bonding, and the forming precision and quality of the inner cavity surface of themetal stiffened edge are ensured. Compared with the prior art, the problems of low material utilization, difficult machining and long production period caused by integral cutting machining of the metal stiffened edge are solved, and the defects of nonuniform thickness distribution and low forming precision of an inner cavity small circular bead caused by a superplastic forming / diffusion bonding method are overcome.

The invention relates to a microforming floating die, in particular to a titanium alloy micro gear pulse current auxiliary microforming floating die, and belongs to the technical field of mechanicalmanufacturing and plastic micro forming. The problems that an existing titanium alloy micro gear die forging micro blank is low in heating efficiency, the micro die is large in stress, a lower cornerof a micro gear is difficult to fill, and the service life of the die is short are solved. A punch is arranged on the lower surface of an upper mold assembly, a male mold is arranged on the upper surface of a lower mold assembly, a male mold is sleeved with a female mold, a mold cavity is formed under the punch, a titanium alloy forging blank is arranged in the mold cavity, one end of a first wireis connected with the upper mold assembly through a wire joint, the other end of the first wire is connected with a pulse power source, one end of a second wire is connected with the lower mold assembly through the other wire joint, and the other end of the second wire is connected with a pulse power source.

The invention relates to the field of micro fuel batteries, specially relates to matching type forming method and device of a fuel battery metal flow field plate, and in particular is suitable for micro-forming suitable for a superthin metal flow field plate with a complicate structure. The matching type forming method comprises the following steps that: according to the structure and the cross-section shape of a flowing passage of a predesigned micro metal flow field plate, an upper die head is designed as a convex die, a lower die head is designed as a concave die, center lines of the two die heads are coincided, the upper die head and the lower die head are opposite, matched and compatible, the lower die head is fixed, and the upper die head can longitudinally move. Moving paths of an upper forming die head and an lower forming die head are planned according to the flowing direction of the flowing passage, and the motions of an X-axial platform and a Y-axial platform are controlled through a control system, so that the motions of the upper forming die head and the lower forming die head are achieved, and the forming of a whole flow field is finished. The forming device comprises a base, an X-axial platform, a Y-axial platform, a blank-pressing device, a control system and a forming system. By utilizing the matching type forming method, the forming of any micro metal flow field plate with the complicate shape can be achieved, and the matching type forming method is beneficial to promoting the application of the micro metal flow field plate in micro fuel batteries.