CN211915251U - Superplastic forming die for large titanium alloy double-curvature angle part - Google Patents
Superplastic forming die for large titanium alloy double-curvature angle part Download PDFInfo
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- CN211915251U CN211915251U CN202020319398.6U CN202020319398U CN211915251U CN 211915251 U CN211915251 U CN 211915251U CN 202020319398 U CN202020319398 U CN 202020319398U CN 211915251 U CN211915251 U CN 211915251U
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Abstract
The utility model belongs to the technical field of the plastic forming processing, concretely relates to superplastic forming die of large-scale titanium alloy double curvature angle section part. The superplastic forming die comprises an upper die and a lower die, wherein the upper die is coupled with the lower die, and the upper die and the lower die are tightly pressed by a press machine of superplastic forming equipment to form reliable sealing; the lower die is used for forming a plate material in a die-attaching mode under the pressure of inert gas, 2 symmetrical parts are designed on a molded surface of the same lower die through a process supplementing surface, 2 parts are formed at the same time, the specific size of the molded surface is determined through process simulation, and the thickness uniformity of the formed parts is guaranteed. The utility model provides a two curvature angle section parts of large-scale titanium alloy superplastic forming die uses the physiosis superplastic to take shape, and fold, the local serious attenuate that mould pressing system produced about having solved original rigidity and the big problem that leads to the shape size overproof of resilience volume.
Description
Technical Field
The utility model belongs to the technical field of the plastic forming processing, concretely relates to superplastic forming die of large-scale titanium alloy double curvature angle section part.
Background
The titanium alloy has high specific strength, excellent fatigue resistance and corrosion resistance, can work at the temperature of about 600 ℃ to show outstanding performance, has the density about half of that of steel and nickel-based high-temperature alloy, and can be successfully applied to the aerospace industry due to the excellent performances.
As shown in FIG. 1, the large double-curvature angle section commonly used at present is a warm-hot forming part made of TC4 titanium alloy and the like, and the isothermal hot forming method is mostly adopted for the titanium alloy thin-wall part because the titanium alloy thin-wall part is difficult to form due to cold working. Isothermal hot forming is a press working technique for manufacturing parts by heating a metal material to a temperature below recrystallization temperature and utilizing the characteristics of improved plasticity and reduced deformation resistance of the metal material at high temperature. This part is located back barrel section, and every aircraft has 2 of symmetry, and the board is thick 2mm, and part length is about 2700mm, and the chordal height is close to 300mm, and the part scale has all reached the limit of producing the part from length to chordal height, and the complexity of shape curvature in addition very easily produces fold, local serious attenuate and the big phenomenon that leads to the overall dimension of shape size out of tolerance of resilience volume when taking shape.
The superplasticity of a metal means that the metal material exhibits the characteristics of no necking and abnormally high elongation under specific internal conditions (material components, structure and phase transformation capability) and external conditions (temperature, heating mode, pressure, strain rate and the like), and deformation with the deformation amount exceeding 100% is called superplastic deformation. Superplastic forming is to form parts with large deformation and complex shapes by utilizing the superplasticity of metal.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the large titanium alloy double-curvature angle part manufactured at present, the superplastic forming die of the large titanium alloy double-curvature angle part is provided.
The technical scheme of the utility model is that:
a superplastic forming die for large titanium alloy double-curvature angle section parts comprises an upper die and a lower die, wherein the upper die is coupled with the lower die, and the upper die and the lower die are tightly pressed by a press machine of superplastic forming equipment to form reliable sealing; the lower die is used for forming a plate material in a die-attaching mode under the pressure of inert gas, 2 symmetrical parts are designed on a molded surface of the same lower die through a process supplementing surface, 2 parts are formed at the same time, the specific size of the molded surface is determined through process simulation, and the thickness uniformity of the formed parts is guaranteed.
The upper die comprises an upper die air inlet 1, an upper die temperature measuring hole 2, an upper die blank holder stem 3 and an upper die pressing plate groove 4; the upper die air inlets 1 are arranged in two groups, are respectively positioned at two ends of the upper die and are used for connecting an equipment air inlet system and filling argon gas when the sheet material is subjected to superplastic forming; an upper die temperature measuring hole 2 is formed in the lower end of the side wall of the upper die and used for monitoring the temperature of the upper die during temperature rising and falling; an upper die pressing plate groove 4 is formed in the upper end of the side wall of the upper die and used for connecting and fixing the upper die and an upper platform of the equipment through a pressing plate; an upper die blank holder 3 is arranged at the edge of the lower surface of the upper die.
The lower die comprises a lower die exhaust hole 5, a lower die temperature measuring hole 6, a lower die blank holder 7, a lower die pressing plate groove 8 and a guide plate 9; the lower die exhaust hole 5 is formed in the upper surface of the lower die, is positioned at the fillet of the final die attaching of the part and is used for exhausting gas during the superplastic forming die attaching of the plate; the lower die temperature measuring hole 6 is formed in the upper end of the side wall of the lower die and used for monitoring the temperature of the lower die during temperature rising and falling; the lower die pressing plate groove 8 is arranged at the lower end of the side wall of the lower die and is used for connecting and fixing the lower die and the lower platform of the device by using a pressing plate; the lower die edge pressing stem 7 is positioned at the edge of the upper surface of the lower die and is used for combining with the upper die edge pressing stem 3, and the upper die and the lower die clamp and seal the plate to ensure the loading of air pressure; and guide plates 9 are arranged on the peripheral side walls of the lower die and used for controlling the accuracy of die assembly positioning.
On the other hand, the utility model provides an adopt foretell superplastic forming die to carry out the superplastic forming method of large-scale titanium alloy hyperbolic angle material part, it includes following step:
step 1, cleaning the surface of a titanium alloy plate until the surface is clean and has no oil stain, and coating a solder stop agent on two surfaces of the plate and the working surface of a superplastic forming die;
step 3, heating the superplastic forming equipment to 400 ℃, making use of the self weight and high temperature of the titanium alloy plate to better plasticity, descending an upper die, closing the upper die and the lower die, pressing the plate in the upper die and the lower die, and sealing the plate by the corresponding edge pressing stems of the upper die and the lower die; then, high-purity argon is filled into the device through an external air pressure loading control system to protect the plate material from being oxidized; continuously heating to the forming temperature of 920 ℃, pressurizing the upper die and the lower die by a press machine, filling argon through an upper die air inlet hole 2, loading the pressure to 1.8MPa for 1.5h, attaching the plate to the molded surface of the lower die, forming the part, and maintaining the pressure for 0.5 h;
step 4, after the air pressure loading is finished, the whole superplastic forming process is finished, the heating is stopped, the air pressure is gradually reduced, and the plate is protected from being oxidized; stopping filling argon when the temperature of the superplastic forming die is reduced to be below 400 ℃, and opening the furnace to take out the parts; after cooling, the part profile is prepared.
The utility model discloses an effect and benefit are:
the utility model provides a two curvature angle section parts of large-scale titanium alloy superplastic forming die uses the physiosis superplastic to take shape, and fold, the local serious attenuate that mould pressing system produced about having solved original rigidity and the big problem that leads to the shape size overproof of resilience volume. The die has the advantages of good formability, high die attaching precision, good surface quality, no resilience, no residual stress and the like, and improves the quality of products. 2 pieces are manufactured by one-time thermal cycle, the utilization rate of energy and materials is improved, and the manufacturing period is shortened.
Drawings
FIG. 1 is a schematic structural diagram of a large titanium alloy double-curvature angle section part.
Fig. 2 is the embodiment of the present invention provides an upper mold structure diagram of a superplastic forming mold for large titanium alloy double-curvature angle section parts.
Fig. 3 is the embodiment of the present invention provides a schematic lower mold structure diagram of a superplastic forming mold for large titanium alloy dual-curvature angle section parts.
Fig. 4 is the embodiment of the present invention provides a schematic view of a mold closing profile structure of a superplastic forming mold for large titanium alloy double-curvature angle section parts.
In the figure: 1, an upper die air inlet; 2, an upper die temperature measuring hole; 3, pressing the blank holder on the die; 4, molding a plate groove; 5, lower die exhaust holes; 6, a temperature measuring hole of the lower die; 7, pressing the side of the lower die; 8, lower molding plate grooves; 9 a guide plate; 101 parts are seriously thinned; 102, the wrinkles are easily generated.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
It is to be understood that the appended drawings are not to scale, but are merely drawn with appropriate simplifications to illustrate various features of the basic principles of the invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations, and configurations, will be determined in part by the particular intended application and environment of use.
In the several figures of the drawings, identical or equivalent components (elements) are referenced with the same reference numerals.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Fig. 2 to fig. 4 are respectively an upper die structure diagram, a lower die structure diagram and a mold closing profile structure diagram of the superplastic forming die for providing large titanium alloy double-curvature angle material parts in the embodiment of the present invention. Referring to fig. 2 to 4, in the embodiment, the superplastic forming die for the large titanium alloy dual-curvature angle section part comprises an upper die and a lower die, wherein the upper die and the lower die are coupled, and the upper die and the lower die form reliable sealing after a press of superplastic forming equipment presses a sheet material; the lower die is used for forming a plate material in a die-attaching mode under the pressure of inert gas, 2 symmetrical parts are designed on a molded surface of the same lower die through a process supplementing surface, 2 parts are formed at the same time, the specific size of the molded surface is determined through process simulation, and the thickness uniformity of the formed parts is guaranteed.
Referring to fig. 2, in the present embodiment, the structure of the upper mold includes an upper mold air inlet 1, an upper mold temperature measuring hole 2, an upper mold blank holder 3 and an upper mold platen groove 4; the upper die air inlets 1 are arranged in two groups, are respectively positioned at two ends of the upper die and are used for connecting an equipment air inlet system and filling argon gas when the sheet material is subjected to superplastic forming; an upper die temperature measuring hole 2 is formed in the lower end of the side wall of the upper die and used for monitoring the temperature of the upper die during temperature rising and falling; an upper die pressing plate groove 4 is formed in the upper end of the side wall of the upper die and used for connecting and fixing the upper die and an upper platform of the equipment through a pressing plate; an upper die edge pressing stem 3 is arranged at the edge of the lower surface of the upper die and used for combining with a lower die edge pressing stem 7, and the upper die and the lower die clamp and seal the plate to ensure the loading of air pressure.
Referring to fig. 3, in the present embodiment, the structure of the lower mold includes a lower mold exhaust hole 5, a lower mold temperature measurement hole 6, a lower mold blank holder 7, a lower mold platen groove 8, and a guide plate 9; wherein, the lower die exhaust hole 5 is arranged on the upper surface of the lower die, is positioned at the fillet of the final die attaching of the part and is used for exhausting gas during the superplastic forming die attaching of the plate; the lower die temperature measuring hole 6 is formed in the upper end of the side wall of the lower die and used for monitoring the temperature of the lower die during temperature rising and falling; the lower die pressing plate groove 8 is arranged at the lower end of the side wall of the lower die and is used for connecting and fixing the lower die and the lower platform of the device by using a pressing plate; the lower die edge pressing stem 7 is positioned at the edge of the upper surface of the lower die and is used for combining with the upper die edge pressing stem 3, and the upper die and the lower die clamp and seal the plate to ensure the loading of air pressure; and guide plates 9 are arranged on the peripheral side walls of the lower die and used for controlling the accuracy of die assembly positioning.
Fig. 4 is the embodiment of the present invention provides a schematic view of a mold closing profile structure of a superplastic forming mold for large titanium alloy double-curvature angle section parts. Referring to fig. 4, in this embodiment, the method for performing superplastic forming on a large titanium alloy double-curvature angle section part by using the superplastic forming mold includes the following steps:
step 1, cleaning the surface of a titanium alloy plate until the surface is clean and has no oil stain, and coating a solder stop agent on two surfaces of the plate and the working surface of a superplastic forming die;
step 3, heating the superplastic forming equipment to 400 ℃, making use of the self weight and high temperature of the titanium alloy plate to better plasticity, descending an upper die, closing the upper die and the lower die, pressing the plate in the upper die and the lower die, and sealing the plate by the corresponding edge pressing stems of the upper die and the lower die; then, high-purity argon is filled into the device through an external air pressure loading control system to protect the plate material from being oxidized; continuously heating to the forming temperature of 920 ℃, pressurizing the upper die and the lower die by a press machine, filling argon through an upper die air inlet hole 2, loading the pressure to 1.8MPa for 1.5h, attaching the plate to the molded surface of the lower die, forming the part, and maintaining the pressure for 0.5 h;
step 4, after the air pressure loading is finished, the whole superplastic forming process is finished, the heating is stopped, the air pressure is gradually reduced, and the plate is protected from being oxidized; stopping filling argon when the temperature of the superplastic forming die is reduced to be below 400 ℃, and opening the furnace to take out the parts; after cooling, the part profile is prepared.
The above description of exemplary embodiments has been presented only to illustrate the technical solutions of the present invention, and is not intended to be exhaustive or to limit the present invention to the precise forms described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.
Claims (1)
1. The superplastic forming die for the large titanium alloy double-curvature angle section part is characterized by comprising an upper die and a lower die, wherein the upper die is coupled with the lower die, and the upper die and the lower die are pressed by a press machine of superplastic forming equipment to form reliable sealing; the lower die is used for sticking the plate to the die and forming under the pressure of inert gas;
the upper die comprises an upper die air inlet hole (1), an upper die temperature measuring hole (2), an upper die blank holder stem (3) and an upper die pressing plate groove (4); the two sets of upper die air inlets (1) are respectively positioned at two ends of the upper die and are used for connecting an equipment air inlet system and filling argon gas when the sheet material is subjected to superplastic forming; an upper die temperature measuring hole (2) is formed in the lower end of the side wall of the upper die and used for monitoring the temperature of the upper die during temperature rising and falling; an upper die pressing plate groove (4) is formed in the upper end of the side wall of the upper die and used for connecting and fixing the upper die and an upper platform of the equipment through a pressing plate; an upper die edge pressing stem (3) is arranged at the edge of the lower surface of the upper die;
the lower die comprises a lower die exhaust hole (5), a lower die temperature measuring hole (6), a lower die blank holder stem (7), a lower die pressing plate groove (8) and a guide plate (9); the lower die exhaust hole (5) is formed in the upper surface of the lower die, is positioned at the fillet of the final die attaching of the part and is used for exhausting gas during the superplastic forming die attaching of the plate; the lower die temperature measuring hole (6) is formed in the upper end of the side wall of the lower die and used for monitoring the temperature of the lower die during temperature rising and falling; the lower die pressing plate groove (8) is arranged at the lower end of the side wall of the lower die and is used for connecting and fixing the lower die and the lower platform of the equipment by using a pressing plate; the lower die edge pressing stem (7) is positioned at the edge of the upper surface of the lower die and is used for combining with the upper die edge pressing stem (3), and the upper die and the lower die clamp and seal the plate to ensure the loading of air pressure; and guide plates (9) are arranged on the peripheral side walls of the lower die and used for controlling the accuracy of die assembly positioning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020319398.6U CN211915251U (en) | 2020-03-16 | 2020-03-16 | Superplastic forming die for large titanium alloy double-curvature angle part |
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| CN202020319398.6U CN211915251U (en) | 2020-03-16 | 2020-03-16 | Superplastic forming die for large titanium alloy double-curvature angle part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113305192A (en) * | 2021-05-27 | 2021-08-27 | 吉林大学 | Method and device for cooperatively enhancing gas-bulging superplastic forming of thin-wall curved surface by vibrating steel ball group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113305192A (en) * | 2021-05-27 | 2021-08-27 | 吉林大学 | Method and device for cooperatively enhancing gas-bulging superplastic forming of thin-wall curved surface by vibrating steel ball group |
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