Static pressure tool

Abstract

The utility model relates to the technical field of clamps, in particular to a static pressure tool which comprises a lower die and a fixed base installed above the lower die, the lower die is used for installing a workpiece, an inflation cavity is formed between the lower die and the fixed base, part of the cavity wall of the inflation cavity is composed of a static pressure film, the static pressure film is made of elastic materials, and the elastic materials are arranged on the fixed base. The outer side of the static pressure film is fixedly connected with a pushing block, the fixed base is further provided with a driving part used for driving the pushing block to move in the longitudinal direction and a ventilation part used for inflating the inflation cavity with gas, the static pressure film is driven by the pushing block to get close to the workpiece and then inflates the inflation cavity with the gas, and the static pressure film compresses the workpiece after expanding and deforming. According to the static pressure film pressing device, pressing is guaranteed, meanwhile, the fitting degree of a static pressure film is better, compared with a plane pressing mode in the prior art, the contact area is increased, meanwhile, the static pressure film pressing device can be repeatedly used, and the production cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a hydrostatic tooling. Background Technology

[0002] A hydrostatic pressing fixture is a device used to apply pressure to achieve specific process effects. It primarily uses a hydraulic or pneumatic system to apply pressure to the surface of an object, causing the object to expand or take shape under pressure. It is commonly used in materials science, mechanical engineering, and other fields. For example, in chip sintering processes, high-pressure sintering is typically used to bond the chip to the substrate, applying high pressure above the chip. Previously, planar pressure heads were used, but in practical applications, the contact between the pressure head and the product is insufficient, limiting its application to products with relatively regular shapes. For products with more complex structures, additional gaskets are needed on the product surface. For instance, Chinese patent document CN202311713168.2 discloses a double-sided isostatic pressing fixture. The invention relates to a molding method, comprising a supporting base plate, a first isostatic pressing steel sheet, multiple adhesive frames, a second isostatic pressing steel sheet, and a silicone pad. The first isostatic pressing steel sheet is stacked on the supporting base plate, the multiple adhesive frames are stacked sequentially on the first isostatic pressing steel sheet, and the second isostatic pressing steel sheet is stacked on the topmost adhesive frame. Silicone pads cover both the bottom of the supporting base plate and the top of the second isostatic pressing steel sheet. The supporting base plate has a hollow area, and the adhesive frames have through holes for placing the cast film. The first isostatic pressing steel sheet has first adhesive passage holes corresponding to the inner cavities on the back of the product after the cast film is stacked, and the second isostatic pressing steel sheet has second adhesive passage holes corresponding to the inner cavities on the front of the product after the cast film is stacked. This patent solves the technical problem of the complex structure of the product's front and back sides making it difficult to withstand pressure. However, the silicone pad added between the product and the pressure head can easily affect the pressure output, leading to difficulties in pressure transmission and requiring greater pressure. Furthermore, excessive pressure also shortens the lifespan of the silicone pad, requiring frequent replacement, which in turn increases production costs and reduces clamping efficiency.

[0003] Therefore, it is necessary to provide a static pressure fixture that, in the static pressure sintering mode, uses high-pressure gas to push the membrane to compress the product, ensuring stable pressure output, improving the membrane's service life and stability, thereby reducing production costs and improving clamping efficiency. This is something that those skilled in the art need to do. Utility Model Content

[0004] The purpose of this utility model is to provide a static pressure fixture that solves the problem of the need for upper mold, lower mold and press to work together in existing sintering products, and the problem of frequent replacement of protective film for sintered products. The beneficial effect is to improve production efficiency and reduce production costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a static pressure tooling, including a lower mold and a fixed base installed above the lower mold. The lower mold is used to install workpieces. An air-filled cavity is provided between the lower mold and the fixed base. Part of the cavity wall of the air-filled cavity is composed of a static pressure membrane. The static pressure membrane is made of elastic material. A push block is fixedly connected to the outside of the static pressure membrane. The fixed base is also provided with a driving component for driving the push block to move longitudinally and a venting component for filling the air-filled cavity with gas. After the static pressure membrane approaches the workpiece under the drive of the push block, it fills the air-filled cavity with gas. After the static pressure membrane expands and deforms, it presses the workpiece.

[0006] Furthermore, the edges of the static pressure membrane extend outward to form a first sealing part and a second sealing part, respectively. The first sealing part is fixedly connected to the push block, and the second sealing part is fixedly connected to the lower surface of the fixed base. The air-filled cavity is formed by the space enclosed by the static pressure membrane and the fixed base.

[0007] Furthermore, the lower mold is equipped with a fixture for mounting the workpiece, and the bottom of the push block can be attached to the upper surface of the fixture under the action of the driving component, and part of the first sealing part is squeezed between the fixture and the push block.

[0008] Furthermore, a sealing block is installed on the lower surface of the fixed base inside the inflation cavity, corresponding to the push block. The space between the sealing block and the push block forms a sealing space for accommodating the second sealing part. After gas is introduced into the inflation cavity, the second sealing part squeezes the push block.

[0009] Furthermore, the push block includes a mounting block and a clamping block, the clamping block being detachably connected to the mounting block and installed on the side of the mounting block away from the sealing block, the clamping block being able to abut against the upper surface of the fixture; the first sealing part includes a mounting part and a push part, the mounting part being located between the clamping block and the mounting block, the push part being located below the mounting block and the push part being able to abut against the upper surface of the fixture.

[0010] Furthermore, the second sealing part includes a mating part, an intermediate part, and a folded part. The mating part is located away from the first sealing part and is situated between the sealing block and the fixed base. The intermediate part and the folded part are situated within the sealing space.

[0011] Furthermore, the mating part on the second sealing part is connected to the sealing block and the fixed base, and the second sealing part is fixedly disposed relative to the fixed base. The folded part is close to the first sealing part and is folded in a wave shape and installed in the sealing space. The first sealing part is movable relative to the fixed base.

[0012] Furthermore, the intermediate portion is located between the mating portion and the folding portion, and the thickness of the intermediate portion is greater than the thickness of the mating portion and the folding portion, respectively. The thickness of the intermediate portion is L1, and the thickness of the folding portion is L2, where L1 > L2.

[0013] Furthermore, the driving component includes a telescopic cylinder, which is mounted on the top surface of the fixed base and the telescopic rod of the telescopic cylinder is away from the top surface of the fixed base. A bracket is provided on the telescopic rod of the telescopic cylinder, and the center of the bracket is mounted on the telescopic rod of the telescopic cylinder. A guide shaft is installed on the end of the bracket, and the guide shaft passes through the wall of the fixed base and is detachably connected to the push block.

[0014] Furthermore, the ventilation component includes a high-pressure air inlet head and a high-pressure air outlet head. The high-pressure air inlet head is installed on the upper surface of the fixed base, and the high-pressure air outlet head is installed on the surface of the fixed base facing the static pressure membrane. The high-pressure air inlet head and the high-pressure air outlet head are interconnected. One end of the high-pressure air inlet head is connected to an air source, and one end of the high-pressure air outlet head is connected to an inflation cavity.

[0015] The beneficial effects of this utility model are as follows: This utility model utilizes high-pressure gas to tightly press the bottom surface of the static pressure film onto the upper surface of the workpiece, which not only ensures compression but also improves the adhesion of the static pressure film. Compared with the prior art that uses a flat surface for compression, this utility model not only increases the contact area but also makes the distribution of the clamping force more uniform, preventing damage caused by uneven force. During the clamping process, this utility model does not require applying excessive pressure. When in use, it is only necessary to maintain the high-pressure state of the high-pressure gas in the inflation cavity for a relatively long time to ensure that the workpiece has enough time to complete subsequent processes, thereby completing the clamping. This greatly improves the clamping efficiency and is reusable, which greatly reduces production costs. Attached Figure Description

[0016] Figure 1 This is a perspective view of the static pressure fixture of this utility model.

[0017] Figure 2 This is an exploded view of the static pressure fixture of this utility model.

[0018] Figure 3 This is a top view of the hydrostatic tooling of this utility model.

[0019] Figure 4 yes Figure 3 A cross-sectional view along the middle BB.

[0020] Figure 5 yes Figure 3 Sectional view along the middle AA.

[0021] Figure 6 yes Figure 5 Schematic diagram of the isometric side.

[0022] Figure 7 yes Figure 5 A magnified view of part A in the middle.

[0023] Figure 8 yes Figure 6 A magnified view of part B in the middle.

[0024] Figure 9 yes Figure 6 A magnified view of part C in the middle.

[0025] The components in the attached diagram are labeled as follows: 10. Lower mold; 11. Receiving slot; 12. Opening; 13. Workpiece; 14. Fixture; 15. Heating element; 20. Fixed base; 21. Drive component; 211. Telescopic cylinder; 212. Bracket; 213. Guide shaft; 214. Linear bearing; 22. Ventilation component; 221. High-pressure air inlet head; 222. High-pressure air outlet head; 223. Through hole; 23. Push block; 231. Mounting block; 232. Clamping block; 24. Inflatable cavity; 25. Sealing block; 26. Sealing space; 27. Limiting protrusion; 28. Sealing ring; 30. Static pressure diaphragm; 31. First sealing part; 32. Second sealing part; 321. Fitting part; 322. Intermediate part; 323. Folding part. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] Please see Figure 1 , Figure 4 This utility model provides a static pressure fixture, including a lower mold 10 and a fixed base 20 installed above the lower mold 10. The lower mold 10 is used to install a workpiece 13. The lower mold 10 is also provided with a heating element 15 and a jig 14. The workpiece 13 is installed in the jig 14, and the jig 14 is placed in the heating element 15. The heating element 15 is used to heat the workpiece 13 in the jig 14 to realize the sintering process.

[0028] In this embodiment, the heating element 15 includes, but is not limited to, a resistance wire, and the workpiece 13 is heated by means of electrical heating.

[0029] In this embodiment, the top surface of the fixture 14 is provided with a support groove (not shown in the figure), and the workpiece 13 is fitted and connected in the support groove. The fixture 14 is made of a heat-conducting material to ensure the stability and uniformity of heating the workpiece 13.

[0030] Further, please refer to Figure 2 , Figure 3The lower mold 10 has a square structure with an open top surface. The opening on the top surface of the lower mold 10 forms a receiving slot 11, and the workpiece 13 is placed in the receiving slot 11. An opening 12 communicating with the receiving slot 11 is provided on one side wall of the lower mold 10. In use, the jig 14 carrying the workpiece 13 is pushed horizontally inward from the opening 12 into the receiving slot 11 to realize loading and improve the convenience of installation.

[0031] The fixed base 20 has a square structure and is detachably connected to the top surface of the lower mold 10 using fasteners such as bolts or screws. The workpiece 13 is located between the fixed base 20 and the lower mold 10.

[0032] A static pressure membrane 30 is provided on the surface of the fixed base 20 facing the lower mold 10. The static pressure membrane 30 is made of elastic material and is deformably disposed on the fixed base 20. The static pressure membrane 30 can press the workpiece 13 tightly. An air-filled cavity 24 is also formed between the lower mold 10 and the fixed base 20, and part of the cavity wall of the air-filled cavity 24 is composed of the static pressure membrane 30.

[0033] In this embodiment, the hydrostatic diaphragm 30 is made of fluororubber material, which has excellent resistance to high temperatures, oil, and chemical corrosion.

[0034] The fixed base 20 is also provided with a driving component 21 and a ventilation component 22. The driving component 21 is used to move the static pressure membrane 30 to be flush with the lower mold 10. The ventilation component 22 is used to ventilate into the inflation cavity 24, so that the static pressure membrane 30 expands and deforms and presses the workpiece 13.

[0035] A pusher block 23 is movably provided on the side of the fixed base 20 facing the lower mold 10. The pusher block 23 is annular, and the static pressure membrane 30 is mounted on the pusher block 23. The pusher block 23 is mounted on the driving component 21, and the driving component 21 drives the pusher block 23 to move up and down, thereby achieving the adhesion of the static pressure membrane 30 to the lower mold 10. The inflation cavity 24 is connected to the ventilation component 22. In use, compressed air is introduced into the inflation cavity 24 through the ventilation component 22, thereby achieving the tight adhesion of the static pressure membrane 30 to the upper surface of the workpiece 13 and pressing the workpiece 13. Furthermore, the driving component 21 includes a telescopic cylinder 211, which includes, but is not limited to, a hydraulic cylinder. The telescopic cylinder 211 is mounted on the top surface of the fixed base 20, and the telescopic rod of the telescopic cylinder 211 is away from the top surface of the fixed base 20. A bracket 212 is provided on the telescopic rod of the telescopic cylinder 211, and the center of the bracket 212 is mounted on the telescopic rod of the telescopic cylinder 211. A guide shaft 213 is mounted on the end of the bracket 212. The guide shaft 213 passes through the wall of the fixed base 20 and is detachably connected to the push block 23. This drives the push block 23 to move up and down. In use, the telescopic cylinder 211 is activated, and the telescopic rod of the telescopic cylinder 211 moves upward. The bracket 212 and the guide shaft 213 follow and move upward. The push block 23 also moves upward, realizing the separation of the static pressure diaphragm 30 from the workpiece 13. The telescopic cylinder 211 is activated again, and the telescopic rod of the telescopic cylinder 211 moves downward. The bracket 212 and the guide shaft 213 follow and move downward. The push block 23 also moves downward, realizing the contact between the static pressure diaphragm 30 and the workpiece 13.

[0036] In this embodiment, a linear bearing 214 is provided in the wall of the fixed base 20, and the guide shaft 213 is connected in the linear bearing 214 to ensure the stability of the guide shaft 213 in moving up and down and to prevent jamming.

[0037] In this embodiment, the bracket 212 is cross-shaped, and the cross intersection of the bracket 212 is mounted on the telescopic rod of the telescopic cylinder 211. Four guide shafts 213 are provided and respectively mounted on the four ends of the bracket 212. At the same time, the four guide shafts 213 are respectively located around the push block 23, so that the guide shafts 213 can stably push the push block 23 from the periphery of the push block 23, thereby ensuring the pressing effect of the push block 23.

[0038] In this embodiment, the fixed base 20 has a limiting protrusion 27 on its surface facing the static pressure membrane 30. The limiting protrusion 27 extends into the inflation cavity 24. By using the limiting protrusion 27 to reduce the volume of the inflation cavity 24, the deformation of the static pressure membrane 30 after inflation becomes faster and more sensitive, thus improving the performance. Further details can be found in the following section. Figure 2 , Figure 5The ventilation component 22 includes a high-pressure air inlet head 221 and a high-pressure air outlet head 222. The high-pressure air inlet head 221 is installed on the upper surface of the fixed base 20, and the high-pressure air outlet head 222 is installed on the lower surface of the fixed base 20 facing the static pressure membrane 30. The high-pressure air inlet head 221 and the high-pressure air outlet head 222 are interconnected. At the same time, one end of the high-pressure air inlet head 221 is connected to a gas source (not shown in the figure), such as a high-pressure gas cylinder, to introduce high-pressure gas. One end of the high-pressure air outlet head 222 passes through the limiting protrusion 27 and is connected to the inflation cavity 24 to introduce high-pressure gas into the inflation cavity 24 and cause the static pressure membrane 30 to expand and press the workpiece 13. In use, the high-pressure gas is used to press the bottom surface of the static pressure membrane 30 tightly against the upper surface of the workpiece 13. This not only ensures compression but also improves the fit of the static pressure membrane 30. Compared with the prior art that uses a flat surface for compression, this invention not only increases the contact area but also makes the distribution of the compression force more uniform, preventing damage caused by uneven force. During clamping, this invention does not require excessive pressure. In use, it is only necessary to maintain the high-pressure state of the high-pressure gas in the inflation cavity 24 for a relatively long time to ensure that the workpiece 13 has enough time to complete the subsequent processes, thereby completing the clamping. This greatly improves the clamping efficiency and ensures the clamping effect.

[0039] In this embodiment, a through hole 223 is provided on the high-pressure air supply head 222 along the circumferential direction. The axis of the through hole 223 is horizontally set and the through hole 223 is directly opposite the wall of the limiting protrusion 27. The through hole 223 is connected to the inflation cavity 24. When in use, the compressed air introduced from the high-pressure air supply head 222 will be ejected from the through hole 223 and sprayed onto the wall of the limiting protrusion 27, thereby preventing the high-pressure gas from being directly sprayed onto the static pressure membrane 30, preventing the static pressure membrane 30 from being subjected to uneven force, and affecting the stability of use.

[0040] Further, please refer to Figure 4 , Figure 6 A sealing block 25 is detachably connected to the surface of the fixed base 20 facing the lower mold 10. The sealing block 25 is detachably connected to the fixed base 20 using fasteners such as bolts or screws. The sealing block 25 is annular and located in the inner ring of the push block 23. A sealing space 26 is formed between the outer ring of the sealing block 25 and the inner ring of the push block 23. The static pressure membrane 30 is sealed and installed on the push block 23. The sealing block 25 is directly opposite the static pressure membrane 30, and the sealing block 25 and the static pressure membrane 30 are sealed and installed together, thereby achieving double fixation.

[0041] The sealing block 25 is sleeved on the outside of the limiting protrusion 27. The sealing block 25 forms part of the cavity wall of the inflatable cavity 24. A sealing ring 28 is also provided between the sealing block 25 and the fixed base 20, so as to improve the sealing effect between the sealing block 25 and the fixed base 20 while ensuring stable installation.

[0042] Specifically, the static pressure diaphragm 30 is provided with a first sealing part 31 and a second sealing part 32 around its perimeter. The first sealing part 31 is mounted on the push block 23, and the second sealing part 32 is located inside the first sealing part 31 and is mounted on the sealing block 25.

[0043] The push block 23 includes a mounting block 231 and a pressing block 232. The pressing block 232 is detachably connected to the mounting block 231 and is installed on the side of the mounting block 231 away from the sealing block 25. The pressing block 232 can abut against the upper surface of the fixture 14. The first sealing part 31 includes a mounting part 311 and a push part 312. The mounting part 311 is located between the pressing block 232 and the mounting block 231. The push part 312 is located below the mounting block 231 and the push part 312 can abut against the upper surface of the fixture 14.

[0044] In use, the clamping block 232 is installed onto the mounting block 231 using fasteners such as bolts or screws, thereby sealing and pressing the first sealing part 31 between the clamping block 232 and the push block 23, completing the sealing installation. At the same time, when the driving component 21 pushes the static pressure diaphragm 30 against the workpiece 13, the clamping block 232 on the push block 23 is flush with the upper surface of the fixture 14, thereby driving the push part 312 on the static pressure diaphragm 30 to abut against the fixture 14. At this time, the push part 312 is squeezed by the mounting block 231 and the fixture 14 on its upper and lower sides, respectively. The left side of the push part 312 abuts against the clamping block 232, so the push part 312 only has deformation space on its right side. This ensures that during processing, the static pressure generated by the deformation of the static pressure diaphragm 30 can only extend towards the workpiece 13, ensuring stable force and improving the sealing effect.

[0045] The second sealing part 32 includes a mating part 321, a middle part 322, and a folding part 323. The mating part 321 is located away from the first sealing part 31 and is situated between the sealing block 25 and the fixed base 20. The middle part 322 and the folding part 323 are located within the sealing space 26. In use, the sealing block 25 is detachably connected to the fixed base 20 using fasteners such as bolts or screws. The mating part 321 on the second sealing part 32 is mated between the sealing block 25 and the fixed base 20, thereby achieving a secondary seal. Since the sealing block 25 is fixedly connected to the fixed base 20, the second sealing part 32 is fixedly positioned relative to the fixed base 20.

[0046] The folded portion 323 is close to the first sealing portion 31. The folded portion 323 is folded in a wave shape and installed in the sealing space 26. In use, since the push block 23 is movably set in the fixed base 20, the first sealing portion 31 is movable relative to the fixed base 20. The push block 23 moves downward, and the first sealing portion 31 moves downward synchronously under the drive of the push block 23. The folded portion 323 is pulled out and flattened, thereby ensuring that the static pressure membrane 30 has sufficient volume for stretching, preventing excessive stretching from affecting the internal air cavity 24, and ensuring stability during use.

[0047] The intermediate portion 322 is located between the mating portion 321 and the folding portion 323. The thickness of the intermediate portion 322 is greater than the thickness of both the mating portion 321 and the folding portion 323. Specifically, the thickness of the intermediate portion 322 is L1, and the thickness of the folding portion 323 is L2, where L1 > L2. The intermediate portion 322 ensures that the folding portion 323 has sufficient extension volume after being pulled or expanded, preventing damage when the static pressure membrane 30 is over-expanded or stretched. This greatly improves the stability and service life of the membrane. After one expansion, as the push block 23 resets, the thicker intermediate portion 322 will shrink significantly. At the same time, the folding portion 323 will be compressed back into the sealing space 26 in a wave-like shape under the limiting of the mounting block 231 and the sealing block 25, thus enabling reuse.

[0048] In this embodiment, the inflation cavity 24 is composed of the inner wall of the second sealing part 32, the sealing block 25, the limiting protrusion 27, and the central part of the static pressure membrane 30.

[0049] In another embodiment, the inflation cavity 24 is formed by the space enclosed by the static pressure membrane 30 and the fixed base 20, and the structure of the static pressure membrane 30 is simplified by reducing the second sealing part 32.

[0050] In other embodiments, the static pressure membrane 30 is spherical, the inflation cavity 24 is entirely composed of the internal cavity of the static pressure membrane 30, and the ventilation component 22 is installed in the inflation cavity 24 to achieve expansion control of the static pressure membrane 30.

[0051] The static pressure diaphragm 30 of this invention has a dual sealing effect. By setting a first sealing part 31 and a second sealing part 32 around the static pressure diaphragm 30, the first sealing part 31 moves with the push block 23 to ensure that the static pressure diaphragm 30 can abut against the workpiece 13. At the same time, the second sealing part 32 is fixedly connected to the top surface of the fixed base 20 to ensure that no matter how the static pressure diaphragm 30 moves, the air-filled cavity 24 inside it remains sealed and is not affected by the deformation of the static pressure diaphragm 30, thereby ensuring the stability of use.

[0052] The specific operation method of this utility model is as follows: Step 1: Start the telescopic cylinder 211, the telescopic rod of the telescopic cylinder 211 moves upward, the bracket 212 and the guide shaft 213 move upward accordingly, and the push block 23 also moves upward to reach the installation state.

[0053] Step 2: Install the workpiece 13 from the opening 12 into the receiving slot 11 to complete the loading.

[0054] Step 3: Reactivate the telescopic cylinder 211. The telescopic rod of the telescopic cylinder 211 moves downward, and the bracket 212 and guide shaft 213 follow suit. The push block 23 also moves downward, and the static pressure diaphragm 30 abuts against the workpiece 13 to complete the positioning.

[0055] Step 4: High-pressure gas is introduced into the inflation cavity 24 through the ventilation component 22, and the static pressure membrane 30 expands and presses the workpiece 13 to complete the pressing.

[0056] This invention utilizes high-pressure gas to press the bottom surface of the static pressure membrane 30 tightly against the upper surface of the workpiece 13. This not only ensures compression but also improves the fit of the static pressure membrane 30. Compared to the prior art that uses a flat surface for compression, this invention not only increases the contact area but also makes the distribution of the compression force more uniform, preventing damage caused by uneven force. During clamping, this invention does not require applying excessive pressure. In use, it is only necessary to maintain the high-pressure state of the high-pressure gas in the inflation cavity 24 for a relatively long time to ensure that the workpiece 13 has enough time to complete subsequent processes, thereby completing the clamping. This greatly improves clamping efficiency and is reusable, significantly reducing production costs.

[0057] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A hydrostatic fixture, comprising a lower mold (10) and a fixed base (20) mounted above the lower mold (10), wherein a workpiece (13) is mounted on the lower mold (10), characterized in that, An air-filled cavity (24) is provided between the lower mold (10) and the fixed base (20). Part of the cavity wall of the air-filled cavity (24) is composed of a static pressure membrane (30). The static pressure membrane (30) is made of elastic material. A push block (23) is fixedly connected to the outside of the static pressure membrane (30). The fixed base (20) is also provided with a driving component (21) for driving the push block (23) to move along the longitudinal direction and a ventilation component (22) for filling the air-filled cavity (24) with gas. After the static pressure membrane (30) approaches the workpiece (13) under the drive of the push block (23), it fills the air-filled cavity (24) with gas. After the static pressure membrane (30) expands and deforms, it presses the workpiece (13) tightly.

2. The hydrostatic tooling according to claim 1, characterized in that, The edges of the static pressure membrane (30) extend outward to form a first sealing part (31) and a second sealing part (32). The first sealing part (31) is fixedly connected to the push block (23), and the second sealing part (32) is fixedly connected to the lower surface of the fixed base (20). The air-filled cavity (24) is formed by the space enclosed by the static pressure membrane (30) and the fixed base (20).

3. The hydrostatic tooling according to claim 2, characterized in that, The lower mold (10) is equipped with a fixture (14) for mounting the workpiece (13). The bottom of the push block (23) can be attached to the upper surface of the fixture (14) under the action of the drive component (21), and part of the first sealing part (31) is squeezed between the fixture (14) and the push block (23).

4. The hydrostatic tooling according to claim 2, characterized in that, A sealing block (25) is installed on the lower surface of the fixed base (20) inside the inflation cavity (24) corresponding to the push block (23). The space between the sealing block (25) and the push block (23) forms a sealing space (26) for accommodating the second sealing part (32). After the inflation cavity (24) is filled with gas, the second sealing part (32) squeezes the push block (23).

5. The hydrostatic tooling according to claim 3, characterized in that, The push block (23) includes a mounting block (231) and a clamping block (232). The clamping block (232) is detachably connected to the mounting block (231) and installed on the side of the mounting block (231) away from the sealing block (25). The clamping block (232) can abut against the upper surface of the fixture (14). The first sealing part (31) includes a mounting part (311) and a push part (312). The mounting part (311) is located between the clamping block (232) and the mounting block (231). The push part (312) is located below the mounting block (231) and the push part (312) can abut against the upper surface of the fixture (14).

6. The hydrostatic tooling according to claim 4, characterized in that, The second sealing part (32) includes a mating part (321), a middle part (322) and a folding part (323). The mating part (321) is away from the first sealing part (31). The mating part (321) is located between the sealing block (25) and the fixed base (20). The middle part (322) and the folding part (323) are located in the sealing space (26).

7. The hydrostatic tooling according to claim 6, characterized in that, The mating part (321) on the second sealing part (32) is connected between the sealing block (25) and the fixed base (20). At the same time, the second sealing part (32) is fixedly set relative to the fixed base (20). The folding part (323) is close to the first sealing part (31). The folding part (323) is folded in a wave shape and installed in the sealing space (26). The first sealing part (31) is movable relative to the fixed base (20).

8. The hydrostatic tooling according to claim 6, characterized in that, The middle part (322) is located between the mating part (321) and the folding part (323). The thickness of the middle part (322) is greater than the thickness of the mating part (321) and the folding part (323), respectively. The thickness of the middle part (322) is L1, and the thickness of the folding part (323) is L2, where L1 > L2.

9. The hydrostatic tooling according to claim 1, characterized in that, The driving component (21) includes a telescopic cylinder (211), which is mounted on the top surface of the fixed base (20) and the telescopic rod of the telescopic cylinder (211) is away from the top surface of the fixed base (20). A bracket (212) is provided on the telescopic rod of the telescopic cylinder (211), and the center of the bracket (212) is mounted on the telescopic rod of the telescopic cylinder (211). A guide shaft (213) is installed on the end of the bracket (212), and the guide shaft (213) passes through the wall of the fixed base (20) and is detachably connected to the push block (23).

10. The hydrostatic tooling according to claim 1, characterized in that, The ventilation component (22) includes a high-pressure air inlet head (221) and a high-pressure air delivery head (222). The high-pressure air inlet head (221) is installed on the upper surface of the fixed base (20), and the high-pressure air delivery head (222) is installed on the surface of the fixed base (20) facing the static pressure membrane (30). The high-pressure air inlet head (221) and the high-pressure air delivery head (222) are interconnected. One end of the high-pressure air inlet head (221) is connected to the air source, and one end of the high-pressure air delivery head (222) is connected to the inflation cavity (24).

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