16 results about "Age forming" patented technology

A mold allowing for rapid positioning, and a mold-based creep-age forming method. A blank sheet is placed on a concave mold surface, and a positioning boss of the blank sheet is fitted to a positioning structure for rapid positioning; a high-temperature sealant is pasted on at least two spaced locations around a flange, a breathable felt is laid on the surface of the blank sheet, and a vacuum bag and the breathable felt are respectively pasted on the high-temperature sealant at different locations of the mold flange; and after the breathable felt and the vacuum bag are pasted, a vacuum nozzle is placed to implement direct vacuumization. The risk of breakage of the vacuum bag is effectively reduced. By means of the method, parts can be rapidly positioned, personnel operations can be reduced, high-precision forming can be achieved, batch forming with high consistency can be achieved, and high heat transfer efficiency can be achieved.

The application discloses a shaping die and a preparation method of a shape memory alloy spring. The die is composed of a shaping mandrel, an end anti-rotation clamping assembly and a radial auxiliary locking hoop. When the spring is prepared, the depth of the spiral limiting groove on the shaping mandrel can be customized. The Ti-rich ternary TiNiCu alloy wire is taken as an object, 20%-50% cold deformation is applied to the wire in advance to introduce high-density dislocations and refine grains, the wire is wound on a special constraint aging forming die, constraint aging treatment is carried out at a temperature of 350 DEG C-550 DEG C for 10-60 minutes, and the target spring is obtained after cooling and rotating demolding. By using the die, the shaping is simple, and stable driving characteristics can be obtained without subsequent cycle training, so that the preparation process of the TiNiCu alloy spring is simplified. Through the synergistic effect of component design, controllable cold deformation and constraint aging, the TiNiCu alloy spring prepared by the application has large driving displacement and high cycle stability, and is especially suitable for application scenarios of long service life, high load and precise driving.

The invention provides a rare earth magnesium alloy creep age forming method and application, and the method comprises the following steps: (1) rare earth magnesium alloy is heated until the creep temperature is reached; (2) the rare earth magnesium alloy reaching the creep temperature is subjected to creep forming under first tensile stress; (3) carrying out aging treatment on the rare earth magnesium alloy under the conditions of creep temperature and first tensile stress; wherein in the step (1), the rare earth magnesium alloy is selected from any one of an Mg-9Gd rare earth magnesium alloy, an Mg-7. 5Gd <-1.5 > Y <-0.4 > Zr rare earth magnesium alloy and an Mg-7. 3Y <-2.9 > Nd <-1.0 > Gd <-0.5 > Zr rare earth magnesium alloy, and the creep temperature ranges from 200 DEG C to 240 DEG C; in the step (2), the first tensile stress ranges from 150 MPa to 250 MPa. According to the method, the formability of the rare earth magnesium alloy can be improved, the microstructure and the mechanical property of the alloy are optimized, and the strength and the plasticity of the alloy can be remarkably improved.

The present invention discloses a method for improving the creep age forming performance of aluminum alloy. The characteristics are as follows: first, the aluminum alloy blank is solution-treated and then water-quenched to obtain a semi-finished aluminum alloy product; then, the quenched semi-finished aluminum alloy product is subjected to aging treatment; then, the aged semi-finished aluminum alloy product is subjected to high-speed impact pre-deformation; finally, the semi-finished aluminum alloy product after high-speed impact pre-deformation is subjected to creep age forming to obtain a finished aluminum alloy product. The advantages are that before the creep age forming of the semi-finished aluminum alloy product, high-speed impact pre-deformation treatment is carried out, so that the internal grains of the aluminum alloy are refined, and at the same time, dislocation microstructures can be introduced into the aluminum alloy matrix, effectively improving the creep amount of the aluminum alloy, promoting the dislocation movement in the aluminum alloy, accelerating the precipitation of the precipitation phase, improving the strength and forming performance of the finished aluminum alloy product, facilitating the simultaneous forming and property improvement of the aluminum alloy, and saving energy consumption.

This invention discloses a laser-shock-assisted creep aging forming method for thin-walled components with complex curvature. The method includes: simulating and obtaining difficult-to-form regions; performing laser shock on the difficult-to-form regions of a large-size aluminum alloy thin-walled component sheet; wrapping and fixing a breathable felt around the impacted component; placing the component in a sealed space formed between a vacuum bag and the mold surface; evacuating the sealed space; and then sending the mold into an autoclave for creep aging. After completion, the component springs back, yielding the target surface. This method uses a laser to impact localized areas of a large-size aluminum alloy thin-walled component, introducing dislocations while achieving pre-forming. This provides a good surface foundation for subsequent high-precision creep aging forming of the component, and is suitable for forming parts with complex curvature.

A creep age forming method and device based on digital twin technology provided by the present disclosure. The method acquires sensor data of the aluminum alloy panel during a creep age forming process and inputs the sensor data into the first prediction model and obtains the predicted springback amount and yield strength output by the first prediction model. First difference values between the predicted springback amount and yield strength with the target springback amount and yield strength are determined. Based on the first difference values, first process parameters are determined for updating the process of the aluminum alloy panel by using the second prediction model. The first process parameters are sent to the autoclave, and the autoclave is controlled to perform a process operation with the first process parameters. The present disclosure can adjust the process based on real-time sensor data to obtain components with precise forming and target performance.

The present invention provides a method for improving the creep aging forming performance of aluminum-lithium alloy components with electric pulse assistance. This forming method controls the component to be formed to perform creep aging forming according to a preset process using an autoclave and an electric pulse generator. The component to be formed includes an aluminum-lithium alloy sheet, multiple first electrodes, and multiple second electrodes, each of which is connected to the positive and negative electrodes of the electric pulse generator, respectively. The angle between the current direction of the pulse current applied by the electric pulse generator and the rolling direction of the aluminum-lithium alloy sheet is 30° to 60°. The preset process improves on the conventional creep aging forming process. During the first preset duration of creep aging and the third preset duration of creep aging, the electric pulse generator applies a pulse current to assist in creep aging forming of the aluminum-lithium alloy sheet. This forming method ensures a good elongation while increasing the creep amount corresponding to the two opportunities for increased creep deformation.

The present invention discloses a buckling suppression device and method for creep age forming of complex thin-walled components. The device includes two bases, two screw rods, a cross beam, and a number of constant force loading units. The two bases are respectively arranged on both sides of the forming tooling, the two screw rods are respectively connected to the two bases, the two ends of the cross beam are respectively connected to the two screw rods, and a number of constant force loading units are installed on the cross beam. By making the axes of all the constant force loading units coincide with the normal direction of the buckling area of the blank to be formed, the ejector rod applies a constant force to the buckling area of the blank, realizing the constraint on the buckling area of the blank during the creep age forming process, and effectively suppressing the buckling during the creep age forming process of complex thin-walled components. At the same time, the buckling suppression method for creep age forming of complex thin-walled components in the method of the present invention improves the forming accuracy and increases the probability of success of the components.

The invention belongs to the technical field of integral stiffened wallboard structure manufacturing, and relates to a method for rapidly determining age forming manufacturing parameters of an aluminum alloy integral wallboard. Comprising the following steps of S1, representing a component as a prediction sample according to a discrete representation method, and performing rebound and strength prediction through a deep learning prediction model; s2, optimization of technological parameters and iterative compensation of mold surface springback are carried out based on a prediction result; and S3, establishing a finite element model of the component according to an iteration result, and checking and correcting the finite element model. According to the method, deep learning and a traditional finite element simulation technology are combined, the key process parameters and the springback compensation molded surface of age forming of the aluminum alloy integral wall plate can be rapidly and accurately determined, and technical auxiliary support is provided for forming and manufacturing of a large complex integral stiffened wall plate.

A buckling suppression method for forming complex curvature thin-walled components, comprising the following steps: Step 1, first cut out the sheet metal for creep age forming, and then continue to cut the sheet metal for creep age forming into a sheet metal workpiece area and a sheet metal allowance area. Punch a circle of small holes in the sheet metal allowance area. Use a metal plate to cut out an upper pressing plate and a lower pressing plate with the same shape as the sheet metal for creep age forming. The middle part of the upper pressing plate is hollow, and the upper pressing plate is provided with small holes corresponding to the small holes for bolts to pass through in the sheet metal allowance area. The lower pressing plate is provided with internal threaded holes corresponding to the small holes; Step 2, place the lower pressing plate on the mold, place the sheet metal workpiece area and the sheet metal allowance area together in a plate shape on the lower pressing plate, and then place the upper pressing plate above it. Tighten and connect the upper pressing plate, the sheet metal allowance area and the lower pressing plate together with bolts to form a connection body; Step 3, after subjecting the connection body to vacuum creep age forming, take out the sheet metal workpiece area.

This invention relates to an efficient forming and manufacturing method for high-strength aluminum alloys using high-strain-rate hot forming, belonging to the technical field of high-efficiency preparation and development of high-strength aluminum alloys. After solution treatment, this invention first performs deep cryogenic treatment, followed by preheating and holding at high strain rate to obtain the formed component. Forming and heat treatment are integrated into a single process. Compared to conventional aging forming methods that require tens of hours of heat treatment, this invention significantly shortens the overall process time, improves efficiency, and facilitates industrial application. Simultaneously, it ensures that the strength of the aluminum alloy component is not lower than that of the T6 state, while also achieving good plasticity and ductility.

The application discloses a method for preparing Sc-Er synergistically reinforced Al-Zn-Mg-Cu alloy by electromagnetic directional solidification, and belongs to the technical field of aluminum alloys. The alloy composition comprises Zn, Mg, Cu, Sc, Er, the balance of Al and inevitable impurities. The vacuum induction melting furnace is used for electromagnetic directional solidification, under the synergistic action of an alternating electromagnetic field and a water-cooled copper mold, the coupling of melt electromagnetic stirring and directional heat flow is realized, the grain is significantly refined, and the composition segregation is inhibited. After subsequent homogenization, hot working and aging treatment, the Sc-Er synergistic effect is used to precipitate high-density, heat-stable L12 type Al3(Sc, Er) nanometer dispersed phase in the matrix. The phase and the η' phase precipitated during aging form a double-peak strengthening system, effectively pinning the grain boundary, inhibiting recrystallization and phase coarsening. The application solves the problems of low toughness and poor heat resistance of high-Zn alloy, and realizes the synergistic improvement of strength, toughness and heat stability.

The present application belongs to the technical field of sheet metal forming, and particularly relates to a creep age forming method for strengthening the coordination of deformation in the reinforced area and the thin skin area and application. The method comprises the following steps: calculating the required pressure for part fitting by using the finite element method; calculating the maximum axial stress when the part is fitted with the die surface; obtaining a gasket according to the maximum axial stress; placing the gasket on the surface of the thin skin area and fixing it; placing the part with the fixed gasket on the die, and sealing by using the vacuum method; placing it in a heating furnace or a hot press tank, and fitting the outer surface of the part with the inner surface of the die according to the calculated pressure and the pre-set process parameters; after the creep age is completed, unloading the temperature and pressure on the formed part. The purpose is to solve the problem that the inconsistency of springback after forming caused by the structural differences of the workpiece itself during creep age forming, thereby affecting the accurate forming of the part.

The invention discloses a multi-stage loading creep age forming process, and relates to the technical field of mechanical forming manufacturing engineering.The multi-stage loading creep age forming process comprises the steps that a wall plate is arranged in loading equipment; the wall plate is heated to the creep aging temperature and kept at the constant temperature; applying a pressure load to the wall plate and keeping the pressure load so as to enable the wall plate to generate an initial stress with a set value; after the stress of the wallboard material is relaxed to a set degree and the yield strength is improved to a set degree, continuously pressurizing on the basis of the previous pressure load to form a new pressure load so as to increase the stress of the wallboard to be the same as the initial stress; the third step and the fourth step are repeated till the wallboard is the same as the target structure and the aging duration of the process design is kept; and cooling to room temperature, and unloading to obtain the formed wallboard with the target structural shape and mechanical properties. According to the multi-stage loading creep age forming process provided by the invention, the forming limit of the wallboard can be improved, and accurate forming of the wallboard can be realized.

The present invention discloses a method for assisted creep aging forming by laser impact to achieve high-precision preforming, comprising the following steps: simulating to obtain the distribution data of the area to be preformed and its underbend amount, obtaining the preforming profile, and then making a preforming mold; placing a large-sized aluminum alloy reinforced thin-walled component sheet on the preforming mold for laser impact; wrapping and fixing the impacted component with breathable felt, and then placing the component in a closed space formed between a vacuum bag and the forming mold profile; evacuating the closed space, and then sending the forming mold into an autoclave for a creep aging process, after which the component rebounds to obtain the target profile. The present invention uses laser to impact a local area of a component, thereby introducing dislocations and achieving precise preforming, providing a good profile foundation for subsequent creep aging high-precision forming of the component, and is suitable for forming large-sized aluminum alloy thin-walled parts with high-precision complex curvatures and reinforced structures.

The application provides a rare earth magnesium alloy creep age forming method and application, and the method comprises the following steps: (1) performing heating treatment on the rare earth magnesium alloy until the creep temperature is reached; (2) performing creep forming on the rare earth magnesium alloy reaching the creep temperature under a first tensile stress; and (3) performing aging treatment on the rare earth magnesium alloy under the creep temperature and the first tensile stress; wherein in the step (1), the rare earth magnesium alloy is selected from any one of Mg-9Gd rare earth magnesium alloy, Mg-7.5Gd-1.5Y-0.4Zr rare earth magnesium alloy and Mg-4.3Y-2.9Nd-1.0Gd-0.5Zr rare earth magnesium alloy, and the creep temperature is 200-240 DEG C; and in the step (2), the first tensile stress is 150-250 MPa. The method can improve the formability of the rare earth magnesium alloy, optimize the microstructure and mechanical properties of the alloy, and significantly improve the strength and plasticity of the alloy.