Efficient superplastic forming die and working method thereof

Abstract

The invention discloses an efficient superplastic forming die and a working method thereof.The efficient superplastic forming die is arranged on a workbench of a superplastic forming hot press and comprises a superplastic forming male die, a superplastic forming female die, a profiling heating assembly and a driving assembly, the back of the superplastic forming male die is provided with a pit matched with a convex cavity, and the back of the superplastic forming female die is provided with a groove matched with the convex cavity; the heating working end of the profiling heating assembly can be matched and filled into the pit; a heat preservation cavity is formed in the position, where the profiling heating assembly is installed, of the workbench, and the driving assembly can drive the profiling heating assembly to be switched between the concave pit and the heat preservation cavity. According to the invention, the separable profiling heating group is arranged on the back of the superplastic forming male die, so that the heating and cooling efficiency is improved, and the processing efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of superplastic forming dies, and particularly to an efficient superplastic forming die and its working method. Background Art

[0002] Superplastic forming refers to a precision forming process in which a superplastic metal sheet is used as a blank to be formed in a die cavity to realize the precision forming of complex-shaped parts by utilizing the ultra-high elongation rate and non-fragile superplasticity exhibited by superplastic metal materials under specific temperature and strain rate conditions. As an advanced metal forming technology, superplastic forming has a wide range of applications in the fields of aerospace, automotive manufacturing, etc. At present, in order to cooperate with the completion of the superplastic forming process, a forming die and a superplastic forming hot press are required. The superplastic forming hot press is provided with heat-insulating four walls between the upper and lower worktables to enclose a square heating furnace cavity. The forming die is placed in the heating furnace cavity and fixed by a pressing plate. Heating rods for heating are installed on the table plates of the upper and lower worktables.

[0003] However, during the superplastic forming production process, for the processing and forming of titanium alloy materials, the temperature of the heating furnace needs to be raised to about 900 °C for preliminary pressing and forming, and then blowing is carried out for gas bulging forming. Before demolding, cooling is carried out. When the die temperature drops to about 200 °C and the workpiece is cooled and formed stably, the die is opened, the front furnace door is opened, and the formed workpiece is taken out. Repeated heating and cooling in this way will cause problems of long production time and low production efficiency. Although some current superplastic forming hot presses integrate liquid cooling plates on the worktable to improve the cooling efficiency, however, for larger dies themselves, they cannot be quickly cooled. In particular, the male die generally has a larger mass compared to the female die and cannot be quickly cooled and heated, which restricts the mass production efficiency.

[0004] In order to overcome the above problems, an efficient superplastic forming die and its working method are needed. Summary of the Invention

[0005] The purpose of the present invention is to provide an efficient superplastic forming die and its working method. By providing a separable profiling heating group on the back of the superplastic forming male die, the heating and cooling efficiency is improved, and thus the processing efficiency is improved.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An efficient superplastic forming die of the present invention is arranged on the workbench of a superplastic forming hot press, and includes a superplastic forming male die, a superplastic forming female die, a profiling heating component and a driving component. A pit adapted to the convex cavity is arranged on the back of the superplastic forming male die, and the heating working end of the profiling heating component can be fitted into the pit; a heat preservation cavity is provided on the workbench at the installation position of the profiling heating component, and the driving component can drive the profiling heating component to switch between the pit and the heat preservation cavity.

[0008] Further, a plurality of vertical rib strips are arranged in the pit. The profiling heating component includes a profiling heating block, a back plate and heating rods. The root of the profiling heating block is installed on the back plate, and the back plate is connected to the driving component; the plurality of profiling heating blocks are arranged at intervals, and the interval width is adapted to the rib strips; the plurality of heating rods are arranged in the profiling heating blocks.

[0009] Further, the superplastic forming male die is installed on the bottom plate of the upper workbench through a pressing plate. The upper workbench is of a hollow structure, and a horizontal partition is arranged in the inner cavity; the heat preservation cavity is arranged between the horizontal partition and the bottom plate.

[0010] Further, the driving component includes a push-pull column and a lifting component. Two push-pull columns are arranged vertically and parallelly. The bottom end of the push-pull column is connected to the top surface of the profiling heating component, and the lifting component lifts and drives the top end of the push-pull column; a guiding hole for guiding the push-pull column is opened on the horizontal partition.

[0011] Further, the lifting component includes a roller, a driving plate and an acting cylinder. A longitudinal slit for guiding the driving plate is opened in the middle of the push-pull column. The roller is installed at the top end of the push-pull column through a bearing seat; the roller rolls and contacts the top surface of the driving plate, and one end of the top surface of the driving plate is set as a slope surface; the bottom surface of the driving plate slides on the horizontal partition, and the acting cylinder drives the driving plate to slide along the longitudinal slit of the push-pull column.

[0012] Further, a connecting plate is vertically connected to the large-head ends of the two driving plates. The acting cylinder is horizontally installed on the horizontal partition through a support seat, and the end of the piston rod of the acting cylinder is installed at the middle position of the connecting plate.

[0013] Further, a sealing plate capable of horizontally sliding for sealing and opening is arranged at the bottom opening of the heat preservation cavity. The bottom of the connecting plate extends downward after passing through the sliding groove opening on the horizontal partition and is connected to one end of the sealing plate.

[0014] Further, the sealing plate is a heat-insulating plate made of a refractory material, and a heat preservation layer is arranged on the inner side wall of the heat preservation cavity.

[0015] Furthermore, graphite powder is coated on the outer surface of the profiling heating block.

[0016] The present invention also discloses a working method for an efficient superplastic forming die. The efficient superplastic forming die described in any one of the above is used to batch process superplastic forming workpieces. The profiling heating component is adopted for separated cooling and contact heating, which improves the processing efficiency.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0018] For the efficient superplastic forming die of the present invention, the profiling heating component is used in cooperation with filling into the concave pit to heat the superplastic forming male die. Compared with the traditional heating plate method, the heating contact area is increased, and thus the heating efficiency is improved. The profiling heating component is separated from the concave pit and enters the heat preservation cavity, quickly separating the high-temperature component from the superplastic forming male die, so that the body of the superplastic forming male die is quickly cooled. Moreover, the profiling heating component is in the heat preservation cavity, and the temperature will not drop much and can be used for the next heating, saving energy. For the efficient superplastic forming die of the present invention, by arranging a separable profiling heating group on the back of the superplastic forming male die, the heating and cooling efficiencies are improved, and thus the processing efficiency is improved.

[0019] In addition, by using rib strips to isolate the concave pit, the stiffness and strength of the superplastic forming male die can be increased, and at the same time, it can be divided into multiple heating units to increase the heat conduction area; by using an alloy heat-resistant cast steel with a suitable grade as the material of the die and the profiling heating block, it has good red hardness and can form a dense oxide film on the surface to avoid surface damage; coating graphite powder can prevent adhesion between the profiling heating block and the inner wall of the concave pit during use. By transforming the upper workbench into a hollow structure, it is convenient to set the heat preservation cavity and the driving component, and at the same time form multiple isolation cavities to reduce the upward heat transfer. By using two push-pull columns with a square cross-section vertically guided to lift the profiling heating component, the profiling heating component is prevented from tilting during the lifting and lowering process; by adding an asbestos heat insulation pad between the bottom end of the push-pull column and the back plate, the upward heat transfer of the profiling heating component can be reduced. By adopting the driving plate and roller method to drive the push-pull column, the height installation space occupied by the lifting component can be reduced; by synchronously driving the two push-pull columns with two driving plates, the profiling heating component can be lifted and lowered smoothly. By setting wear-resistant strips and T-shaped chutes at the bottom end of the driving plate, it is ensured that the driving plate does not break away from the horizontal partition during the sliding process, and at the same time, the friction loss between the two can be reduced. By adding a sealing plate, the heat preservation cavity and the concave pit can be isolated. During the cooling process, the temperature in the heat preservation cavity can be prevented from being re-transferred downward to the superplastic forming male die, and at the same time, excessive heat loss of the profiling heating component in the heat preservation cavity can be avoided; by connecting the bottom end of the connecting plate to the end of the sealing plate, the sequential driving effect can be achieved only by using one actuating cylinder, first opening and then lowering the profiling heating component into the concave pit, first entering the heat preservation cavity and then sealing. Brief Description of the Drawings

[0020] The present invention will be further described below in conjunction with the drawings.

[0021] Figure 1 It is a front view sectional view of the high-efficiency superplastic forming die of the present invention in the cooling state;

[0022] Figure 2 It is a front view sectional view of the high-efficiency superplastic forming die of the present invention in the heating state;

[0023] Figure 3 For Figure 1 It is a partial enlarged structural view of part I in

[0024] Figure 4 It is a top view structural view of the driving plate part in the present invention.

[0025] Description of the reference numerals: 1, upper workbench; 101, horizontal partition board; 102, chute opening; 2, lower workbench; 3, superplastic forming male die; 301, ribbed bar; 4, superplastic forming female die; 5, profiling heating assembly; 501, profiling heating block; 502, back plate; 503, heating rod; 6, push-pull column; 7, roller; 8, driving plate; 801, connecting plate; 802, wear-resistant strip; 9, sealing plate; 10, acting cylinder; 11, heat preservation cavity; 111, heat preservation layer; 12, support seat. Detailed Embodiments

[0026] The core of the present invention is to provide a high-efficiency superplastic forming die and its working method, by setting a separable profiling heating group on the back of the superplastic forming male die, improving the heating and cooling efficiency, and thus improving the processing efficiency.

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] Referring to the drawings, Figure 1Schematic front sectional view of the high-efficiency superplastic forming die of the present invention in a cooled state; Figure 2 Schematic front sectional view of the high-efficiency superplastic forming die of the present invention in a heated state; Figure 3 is Figure 1 Schematic enlarged partial structure view of part I in Figure 4 Schematic top view structure of the driving plate part in the present invention.

[0030] In a specific embodiment, as Figures 1 to 4 shown, the high-efficiency superplastic forming die of the present invention is arranged on the workbench of a superplastic forming hot press, and the workbench of the hot press needs to be refitted. The high-efficiency superplastic forming die of the present invention includes a superplastic forming male die 3, a superplastic forming female die 4, a profiling heating assembly 5 and a driving assembly. A concave pit adapted to its convex cavity is provided on the back of the superplastic forming male die 3, and the heating working end of the profiling heating assembly 5 can be fitted into the concave pit. A heat preservation cavity 11 is provided in the workbench at the installation position of the profiling heating assembly 5, and the driving assembly can drive the profiling heating assembly 5 to switch positions between the concave pit and the heat preservation cavity 11.

[0031] By using the profiling heating assembly 5 to be fitted into the concave pit to heat the superplastic forming male die 3, compared with the traditional heating plate method, the heating contact area is increased, and thus the heating efficiency is improved. When the profiling heating assembly 5 is separated from the concave pit and enters the heat preservation cavity 11, the high-temperature part is quickly separated from the superplastic forming male die 3, so that the body of the superplastic forming male die 3 can be quickly cooled. Moreover, when the profiling heating assembly 5 is in the heat preservation cavity 11, the temperature will not drop much and can be used for the next heating, saving energy. The high-efficiency superplastic forming die of the present invention improves the heating and cooling efficiency by providing a separable profiling heating group on the back of the superplastic forming male die, and thus improves the processing efficiency.

[0032] In a specific embodiment of the present invention, as Figures 1 to 3 shown, a plurality of vertical rib strips 301 are provided in the concave pit. The rib strips 301 can be longitudinal, transverse, or arranged in a vertical and horizontal cross pattern. The profiling heating assembly 5 includes a profiling heating block 501, a back plate 502 and heating rods 503. The root of the profiling heating block 501 is installed on the back plate 502, and the back plate 502 is connected to the driving assembly. A plurality of profiling heating blocks 501 are arranged at intervals, and the interval width is adapted to the rib strips 301. A plurality of heating rods 503 are arranged in the profiling heating block 501, and the heating rods 503 are connected to the electric control system of the equipment through insulated wires.

[0033] Specifically, as Figure 3 shown, the material of the profiling heating block 501 is the same as that of the superplastic forming male die 3, and is also an alloy heat-resistant cast steel with the grade of ZG35Cr24Ni7SiN. Graphite powder is coated on the outer surface of the profiling heating block 501.

[0034] By using the rib strips 301 to isolate the pits, the stiffness and strength of the superplastic forming male die 3 can be increased, and at the same time, it can be divided into multiple heating units to increase the heat conduction area; by using the alloy heat-resistant cast steel of ZG35Cr24Ni7SiN as the material of the die and the profiling heating block 501, it has good red hardness and can form a dense oxide film on the surface to avoid surface damage; coating graphite powder can prevent the profiling heating block 501 from adhering to the inner wall of the pit during use.

[0035] In a specific embodiment of the present invention, as Figures 1 to 3 shown, the workbench includes an upper workbench 1 and a lower workbench 2 which are oppositely arranged on the hot press. The superplastic forming male die 3 is installed on the bottom plate of the upper workbench 1 through a pressing plate. The upper workbench 1 is a hollow structure and a horizontal partition 101 is arranged in the middle of the inner cavity. Ribs for increasing the support strength are arranged in the hollow structure. The heat preservation cavity 11 is arranged between the horizontal partition 101 and the bottom plate.

[0036] Obviously, a heating plate can also be stacked on the bottom plate of the workbench 1 to perform auxiliary heating on the edge position of the superplastic forming male die 3.

[0037] By transforming the upper workbench 1 into a hollow structure, it is convenient to arrange the heat preservation cavity 11 and the driving assembly, and at the same time, multiple isolation cavities are formed to reduce the upward transfer of heat.

[0038] Generally speaking, because the contact area between the bottom surface of the superplastic forming female die 4 and the lower workbench ② is relatively large, directly heating with the lower workbench 2 can obtain a higher heating efficiency, so it is not necessary to add another set of profiling heating assemblies 5 and heat preservation cavities 11 below the superplastic forming female die 4. Of course, if the superplastic forming female die 4 is a multi-cavity component with a large amount of internal filling and can also form multiple pit structures, a set of profiling heating assemblies 5 and heat preservation cavities 11 can also be added according to the actual situation to improve the processing efficiency. Similar simple extended deformation methods all fall within the protection scope of the present invention.

[0039] In a specific embodiment of the present invention, as Figure 2 and Figure 3 shown, the driving assembly includes push-pull columns 6 and a lifting assembly. Two push-pull columns 6 are arranged vertically and parallelly. The cross-section of the push-pull column 6 is square. The bottom end of the push-pull column 6 is connected to the top surface of the profiling heating assembly 5. The lifting assembly lifts and drives the top end of the push-pull column 6. Vertical guide holes for guiding the push-pull column 6 are opened on the horizontal partition 101.

[0040] Specifically, as Figure 2 and Figure 3 shown, the bottom end of the push-pull column 6 is fixedly connected to the back plate 502, and an asbestos heat insulation pad is provided between the two.

[0041] The contoured heating component 5 is lifted by two vertically guided square-section push-pull columns 6, thereby preventing the contoured heating component 5 from tilting during the lifting process; by adding an asbestos insulation pad between the bottom end of the push-pull column 6 and the back plate 502, the upward heat transfer of the contoured heating component 5 can be reduced.

[0042] Specifically, if Figures 1 to 3 As shown, the lifting assembly includes a roller 7, a drive plate 8 and an action cylinder 10. A longitudinal slit is provided in the middle of the push-pull column 6 to guide the drive plate 8, and the longitudinal slit is provided along the entire length of the push-pull column 6 in the height direction. The central axis of the roller 7 is mounted on the top of the push-pull column 6 through bearing seats at both ends. The roller 7 rolls in contact with the top surface of the drive plate 8, and one end of the top surface of the drive plate 8 is set as a slope surface. The two ends of the slope surface are respectively the high position and the low position of the roller 7, corresponding to the contour heating component 5 entering the insulation chamber 11 and the contour heating component 5 entering the pit. The bottom surface of the drive plate 8 slides on the horizontal partition 101, and the action cylinder 10 drives the drive plate 8 to slide along the longitudinal slit of the push-pull column 6.

[0043] Specifically, if Figures 1 to 4 As shown, the large ends of the two driving plates 8 are vertically connected to a connecting plate 801 , the action cylinder 10 is horizontally mounted on the horizontal partition 101 through a support seat 12 , and the piston rod end of the action cylinder 10 is mounted in the middle position of the connecting plate 801 .

[0044] By using the driving plate 8 in conjunction with the roller 7 to drive the push-pull column 6, the height installation space occupied by the lifting component can be reduced; by synchronously driving the two push-pull columns 6 by two driving plates 8, the smooth lifting and lowering of the contoured heating component 5 can be achieved.

[0045] Obviously, the lifting assembly can also be replaced with a vertically mounted hydraulic cylinder, which directly lifts and pulls the push-pull column 6 to achieve the raising and lowering of the contoured heating assembly 5. This method requires a greater installation height and therefore places higher demands on the equipment. Similar simple replacement methods fall within the scope of protection of the present invention.

[0046] Specifically, if Figure 1 and Figure 2 As shown, a wear-resistant strip 802 is provided at the bottom end of the driving plate 8, and the wear-resistant strip 802 is a cast iron strip installed on the bottom edge of the driving plate 8; a T-shaped slide groove adapted to the wear-resistant strip 802 is provided on the horizontal partition 101, and the wear-resistant strip 802 slides in the guided manner in the T-shaped slide groove.

[0047] By arranging the wear-resistant strip 802 and the T-shaped slide groove at the bottom end of the driving plate 8, it is ensured that the driving plate 8 does not separate from the horizontal partition 101 during the sliding process, and at the same time the friction loss between the two can be reduced.

[0048] In a specific embodiment of the present invention, as Figures 1 to 3 shown, a sealing plate 9 capable of horizontally sliding for sealing and opening is provided at the bottom opening of the heat preservation cavity 11, and an opening groove passing through the sealing plate 9 is provided on the bottom side wall of the heat preservation cavity 11. The bottom of the connecting plate 801 passes through the sliding groove opening 102 on the horizontal partition plate 101 and then extends downward and is connected to one end of the sealing plate 9.

[0049] Specifically, as Figure 3 shown, the sealing plate 9 is a heat insulation plate made of refractory material, and a heat preservation layer 111 is provided on the inner side wall of the heat preservation cavity 11.

[0050] By adding the sealing plate 9, the heat preservation cavity 11 and the pit can be isolated. During the cooling process, it can prevent the temperature in the heat preservation cavity 11 from being re-transmitted downward to the superplastic forming male die 3, and also avoid excessive heat loss of the profiling heating component 5 in the heat preservation cavity 11; by connecting the bottom of the connecting plate 801 to the end of the sealing plate 9, the sequential driving effect can be achieved only by using one acting cylinder 10. First, open the opening, then lower the profiling heating component 5 into the pit, first enter the heat preservation cavity 11 and then seal.

[0051] The working principle of the high-efficiency superplastic forming die of the present invention: When switching to the mold heating state, the acting cylinder 10 ejects, pushing the connecting plate 801, and the connecting plate 801 drives the sealing plate 9 to make an opening action; the acting cylinder 10 continues to eject, and the roller 7 starts to roll and contact the slope surface of the driving plate 8, gradually lowering from the high end to the low end. Under the influence of its own weight, the profiling heating component 5 drives the push-pull column 6 to move vertically downward, gradually entering the pit from the heat preservation cavity 11. Because the profiling heating component 5 is in the heat preservation cavity 11 and has not completely dissipated heat and cooled down, the temperature can still be maintained at 700-850 degrees Celsius at this time, avoiding re-heating from a low temperature; after contacting the inner wall of the pit, the electric control system of the equipment controls the heating rod 503 to start heating, and can quickly heat up the superplastic forming male die 3 that has dropped to 200 degrees Celsius. After completing the superplastic inflation molding and before demolding, first, the mold needs to be cooled down. At this time, switch to the mold cooling state, the acting cylinder 10 retracts, pulling back the connecting plate 801, and the roller 7 starts to roll and contact the slope surface of the driving plate 8, gradually rising from the low end to the high end. The roller 7 is pushed upward, and the profiling heating component 5 is lifted vertically upward by the push-pull column 6, gradually entering the heat preservation cavity 11 from the pit. The acting cylinder 10 continues to retract, and the connecting plate 801 drives the sealing plate 9 to make a sealing action, isolating the heat preservation cavity 11 and the pit, which is beneficial to the rapid heat dissipation of the profiling heating component 5.

[0052] It should be noted that this application does not elaborate on the heat dissipation mechanism and other heating mechanisms of the mold, as these are not improvements of this application and are inherent to existing equipment and fall within the scope of the prior art. Therefore, any omissions herein shall not be construed as limiting this application.

[0053] In summary, the high-efficiency superplastic forming die of the present invention adopts a profile heating component 5 to be filled into the pit to heat the superplastic forming male mold 3. Compared with the traditional heating plate method, the heating contact area is increased, thereby improving the heating efficiency. The profile heating component 5 is separated from the pit and enters the heat preservation cavity 11, and the high-temperature component is quickly separated from the superplastic forming male mold 3, so that the superplastic forming male mold 3 body is quickly cooled. Moreover, the temperature of the profile heating component 5 will not drop much in the heat preservation cavity 11, and it will be used for standby heating next time, saving energy. The high-efficiency superplastic forming die of the present invention improves the heating and cooling efficiency by arranging a detachable profile heating group on the back of the superplastic forming male mold, thereby improving the processing efficiency. In addition, by isolating the pit with rib strips 301, the rigidity and strength of the superplastic forming male mold 3 can be increased, and it can be divided into multiple heating units, increasing the heat conduction area. By using a suitable grade of alloy heat-resistant cast steel as the material for the mold and the contoured heating block 501, it has good red hardness and can form a dense oxide film on the surface to avoid surface damage. Coating with graphite powder can prevent the contoured heating block 501 from adhering to the inner wall of the pit during use. By transforming the upper workbench 1 into a hollow structure, it is convenient to install the insulation chamber 11 and the drive assembly, and multiple isolation chambers are formed to reduce the upward transfer of heat. The contoured heating assembly 5 is lifted by two vertically oriented square cross-section push-pull columns 6, which prevents the contoured heating assembly 5 from deflecting during the lifting process. By adding an asbestos insulation pad between the bottom end of the push-pull column 6 and the back plate 502, the upward transfer of heat from the contoured heating assembly 5 can be reduced. By using a drive plate 8 in conjunction with rollers 7 to drive the push-pull column 6, the height installation space occupied by the lifting assembly can be reduced. By using two drive plates 8 to synchronously drive the two push-pull columns 6, the contour heating assembly 5 can be smoothly raised and lowered. By providing wear-resistant strips 802 and T-shaped grooves at the bottom end of the drive plate 8, the drive plate 8 is ensured not to separate from the horizontal partition 101 during sliding, while also reducing friction loss between the two. By adding a sealing plate 9, the insulation chamber 11 and the pit can be isolated. During the cooling process, the temperature in the insulation chamber 11 can be prevented from being transferred back to the superplastic forming male mold 3, and excessive heat loss from the contour heating assembly 5 in the insulation chamber 11 can be avoided. By connecting the bottom of the connecting plate 801 to the end of the sealing plate 9, a sequential drive effect can be achieved using only one working cylinder 10, first opening the cavity and then lowering the contour heating assembly 5 into the pit, first entering the insulation chamber 11 and then sealing it.

[0054] The present invention also discloses a working method of an efficient superplastic forming die. The efficient superplastic forming die in any of the above embodiments is used to batch process superplastic forming workpieces. The use of a profiling heating component for separation cooling and contact heating improves the processing efficiency.

[0055] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0056] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An efficient superplastic forming die is arranged on the workbench of a hot press for superplastic forming, and is characterized in that, It includes a superplastic forming male die (3), a superplastic forming female die (4), a profiling heating component (5) and a driving component. A pit adapted to the convex cavity is provided on the back of the superplastic forming male die (3), and the working end of the profiling heating component (5) can be fitted into the pit for heating; a heat preservation cavity (11) is provided at the installation position of the profiling heating component (5) on the workbench, and the driving component can drive the profiling heating component (5) to switch between the pit and the heat preservation cavity (11).

2. The high-efficiency superplastic forming die according to claim 1, wherein: A plurality of vertical rib strips (301) are provided in the pit. The profiling heating component (5) includes a profiling heating block (501), a back plate (502) and heating rods (503). The root of the profiling heating block (501) is installed on the back plate (502), and the back plate (502) is connected to the driving component; A plurality of the profiling heating blocks (501) are arranged at intervals, and the interval width is adapted to the rib strips (301); a plurality of the heating rods (503) are arranged in the profiling heating blocks (501).

3. The high-efficiency superplastic forming die according to claim 1, wherein: The superplastic forming male die (3) is installed on the bottom plate of the upper workbench (1) through a pressing plate. The upper workbench (1) is of a hollow structure, and a horizontal partition plate (101) is provided in the middle of the inner cavity; the heat preservation cavity (11) is provided between the horizontal partition plate (101) and the bottom plate.

4. The high-efficiency superplastic forming die according to claim 3, characterized in that: The driving component includes push-pull columns (6) and a lifting component. Two push-pull columns (6) are arranged vertically and parallelly. The bottom end of the push-pull column (6) is connected to the top surface of the profiling heating component (5), and the lifting component lifts and drives the top end of the push-pull column (6); guiding holes for guiding the push-pull columns (6) are provided on the horizontal partition plate (101).

5. The high-efficiency superplastic forming die according to claim 4, characterized in that: The lifting component includes rollers (7), a driving plate (8) and an acting cylinder (10). A longitudinal slit for guiding the driving plate (8) is provided in the middle of the push-pull column (6). The rollers (7) are installed at the top end of the push-pull column (6) through bearing seats; the rollers (7) are in rolling contact with the top surface of the driving plate (8), and one end of the top surface of the driving plate (8) is set as a slope surface; the bottom surface of the driving plate (8) slides on the horizontal partition plate (101), and the acting cylinder (10) drives the driving plate (8) to slide along the longitudinal slit of the push-pull column (6).

6. The high-efficiency superplastic forming die according to claim 5, wherein, A connecting plate (801) is vertically connected to the large head ends of the two driving plates (8). The acting cylinder (10) is horizontally installed on the horizontal partition plate (101) through a support seat (12), and the piston rod end of the acting cylinder (10) is installed at the middle position of the connecting plate (801).

7. The high-efficiency superplastic forming die according to claim 6, characterized in that: A sealing plate (9) capable of horizontally sliding for sealing and opening is provided at the bottom opening of the heat preservation cavity (11). The bottom of the connecting plate (801) extends downward after passing through the sliding groove opening (102) on the horizontal partition plate (101) and is connected to one end of the sealing plate (9).

8. The high-efficiency superplastic forming die according to claim 7, wherein: The sealing plate (9) is a heat insulation plate made of refractory material, and a heat preservation layer (111) is provided on the inner side wall of the heat preservation cavity (11).

9. The high-efficiency superplastic forming die according to claim 2, characterized in that: Graphite powder is coated on the outer surface of the profiling heating block (501).

10. An efficient working method for a superplastic forming die, characterized in that: Using the high-efficiency superplastic forming die according to any one of claims 1 to 9 to batch process superplastic forming workpieces, the use of a profiling heating component for separation cooling and contact heating improves the processing efficiency.

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