Integral forming method for titanium alloy large-section-difference complex bus ultrathin conical shell

Abstract

The invention relates to the technical field of metal forming and manufacturing, in particular to an integral forming method for a titanium alloy large-section-difference complex bus ultrathin conical shell. A cold die hot stamping technology is adopted in the pre-forming stage, through combination of a cold die and a hot blank, in the forming process, the die works at the normal temperature, and the problems of thermal fatigue, oxidation, high-temperature softening and the like are avoided. The durability of the mold is greatly improved, and meanwhile, the requirement on the high-temperature resistance of a mold material is also reduced; after being rapidly heated outside, the titanium alloy conical cylinder is rapidly transferred to a cold mold to be pre-formed. According to the preforming method, the blank configuration is regulated and controlled through an axial-circumferential cooperative loading dynamic material supplementing method, a local pulling-pressing composite stress field is constructed in a medium-temperature area, local excessive thinning is avoided, the requirement for the large bulging amount is met through active pushing of a material supplementing area at the large opening end of a blank, the defects of wrinkling, cracking and the like of a component are overcome, and the quality of the component is improved. Therefore, the geometric accuracy and the wall thickness uniformity of the component are improved.

Description

Technical Field

[0001] This invention relates to the field of metal forming and manufacturing technology, specifically to a method for integral forming of a complex busbar ultrathin conical shell with large cross-sectional differences in titanium alloy. Background Technology

[0002] Titanium alloy ultrathin conical shells with complex cross-sectional differences and large busbars are key hot-end components in high-end aerospace equipment, playing a crucial role in reducing engine weight and improving engine performance. These components must withstand multi-dimensional composite loads such as high temperature, high pressure, and combined stress during service, exhibiting characteristics of complex busbars, large cross-sectional differences, and ultrathin wall thickness. However, titanium alloys have high strength, poor plasticity, and low Young's modulus at room temperature, making them very difficult to form and prone to cracking and springback. Therefore, hot forming is often employed. By increasing the forming temperature, the elastic strain of the titanium alloy is reduced, decreasing springback and resulting in integral components with high dimensional accuracy and reliable microstructure.

[0003] Currently, the domestic aerospace industry primarily relies on a steel mold segmented hot stamping and welding process to manufacture ultra-thin conical shells for complex busbars with large cross-sectional differences made of titanium alloy. This process cannot meet the requirements for integral forming of ultra-thin conical shells with large cross-sectional differences, and suffers from problems such as long production cycles, complex processes, and excessive manual operation. It is also prone to defects such as uneven wall thickness distribution, localized stress concentration, poor shape accuracy, and microcracks at weld seams. Therefore, a novel integral forming technology is urgently needed.

[0004] Integral forming not only yields integral components with high dimensional accuracy and reliable microstructure, but also offers significant economic benefits compared to the traditional "steel mold segmented hot stamping + welding" process. Integral forming of ultra-thin conical shells with complex busbars and large cross-sectional differences in titanium alloys is a method of obtaining components through plastic forming processes using a complete slab. Common integral forming methods include superplastic forming and spin forming.

[0005] (1) Superplastic forming is a conventional technique for obtaining large, complex, and difficult-to-deform thin-walled curved parts. It generally requires heating the slab to a specified temperature and utilizing its properties at a specific strain rate (1.3 × 10⁻⁶). -4 ~10 -3 s -1 Superplasticity occurs under conditions of high temperature and fine grain structure (≤3μm). By precisely controlling the feed rate of inert gas, complex structural parts can be obtained by superplastic deformation of titanium alloy billets at high temperatures. However, superplastic forming has problems such as low forming efficiency, poor wall thickness uniformity, and high equipment requirements. (2) Spin forming is an important plastic forming method for obtaining thin-walled curved surface components of revolution. By using a spinning wheel to apply pressure to the blank, the spinning wheel moves in a set motion trajectory, forcing the blank to form a thin-walled curved surface component. However, for ultra-thin conical shells with large cross-sectional differences and complex generatrices of titanium alloys, due to the large strain and nonlinear deformation during the spinning process, the forming process is prone to instability and wrinkling, and the forming performance is difficult to control; the wall thickness reduction rate is prone to be too large during the spinning process, resulting in wall thickness deviation and insufficient uniformity.

[0006] In summary, existing methods suffer from low production efficiency, low production precision, and poor forming stability, all of which fail to meet the service performance requirements of ultra-thin conical shells with complex busbars and large cross-sectional differences in titanium alloys. Therefore, a solution is urgently needed to address the challenge of achieving high-performance integral forming of ultra-thin conical shells with complex busbars and large cross-sectional differences in titanium alloys. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a method for integral forming of ultra-thin conical shells with complex busbars of large cross-section differences in titanium alloys. By combining cold die hot stamping technology and integral internal pressure forming technology, the forming process is precisely controlled in stages, thereby achieving high-performance integral manufacturing of ultra-thin conical shells with complex busbars of large cross-section differences.

[0008] The specific technical solution is as follows: A method for integral forming of an ultrathin conical shell with a complex busbar and large cross-sectional difference in titanium alloy, specifically including the following steps: (1) Rapid heating: According to the design parameters, the titanium alloy fan-shaped slab is rolled and welded into a titanium alloy cone. The clamping device clamps the large end of the titanium alloy cone and heats the titanium alloy cone at a rapid rate. Heat quickly to the preset temperature The temperature at the clamping end of the titanium alloy cone is The heat preservation time is less than ; (2) Rapid transfer: The heated titanium alloy cone is rapidly transferred to a pre-forming mold at room temperature; (3) Cold die hot stamping, close the pressure ring, press the large end of the titanium alloy cone, load the punch along the axial direction, and perform continuous and gradual preforming to obtain the preform; (4) Weld the end cap to the small end of the preform, place it into the expansion mold, and adjust the mold temperature to T2; (5) Hot gas pressure expansion and shaping: the large end of the preform is widened and sealed, and air is added and pressurized. The high-pressure air source is adjusted to the pressurization rate. Inflate the preform cavity with gas to a pressure of p1, causing the preform to expand and conform to the mold. (6) After the preform is expanded and attached to the mold, the temperature inside the mold and the pressure inside the formed workpiece are kept constant. The workpiece is kept warm and pressure is maintained for a period of time to achieve high-pressure shaping. (7) Rapid switching between hot and cold gases: Low-temperature inert gas is introduced into the inner cavity of the formed workpiece for rapid cooling. Open the mold and take out the parts; (8) Cut the end cap and process section to obtain a titanium alloy large cross section difference complex busbar ultrathin conical shell.

[0009] The rapid heating described in step (1) employs induction heating, contact heating, or self-resistance heating, with a heating rate of... Preset temperature for 20-100℃ / s The temperature is 400-500℃, the holding time t1 is 30-90s, the clamping device of the heating equipment is located on both sides of the large end of the titanium alloy cone, and the temperature of the blank clamping end is 300-450℃.

[0010] The titanium alloy cone mentioned in step (1) is made of near- Type titanium alloy or Titanium alloy cone blanks are produced by laser cutting machines, roll bending machines, plate rolling machines, and welding machines, either by laser welding or argon arc welding.

[0011] In step (1), after cleaning the surface of the titanium alloy cone, an anti-oxidant is sprayed evenly, and a release agent is sprayed evenly on the mold surface and allowed to dry completely.

[0012] The T2 mentioned in step (4) is 700-900℃.

[0013] In step (5), the high-pressure gas in the inner cavity of the preform during hot gas compression forming is one of carbon dioxide, nitrogen, or an inert gas, and the pressurization rate is... The pressure is 0.01-0.2 MPa / s, and the gas pressure p1 is 2-10 MPa.

[0014] The steps described in step (7) The temperature ranges from 20 to 200℃.

[0015] The cutting in step (8) uses a laser cutting machine to remove the process segment of the formed workpiece to meet the product's size requirements.

[0016] In step (1), the clamping device clamps the large end of the titanium alloy cone, and the induction heating coil is surrounded on the outside of the titanium alloy cone.

[0017] The preforming mold in step (2) includes a positioning plate, a pressure block, a wedge, an upper slider, a lower slider, a back plate, a base plate, a transition plate, a guide post, a punch, a die, and a pressure ring. The die is mounted on the base plate, the base plate is mounted on the lower slider, the punch is bolted to the wedge, the wedge is bolted to the transition plate, the transition plate is bolted to the back plate, and the back plate is mounted on the upper slider. The die has a vertical guide post at its inner center, and the punch has a vertical guide groove at its center. The guide groove and the guide post cooperate to limit and guide the die. The transition plate is bolted to the wedge, the positioning plate supports the pressure block, the wedge and the pressure block are in contact as a kinematic pair, and the pressure ring is in contact with the titanium alloy cone.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: This invention addresses the problems of uneven wall thickness distribution, microcracks at welds, low production efficiency, and high scrap rate in existing forming methods. It provides a method for integral forming of ultrathin conical shells with complex busbars of large cross-sectional differences made of titanium alloy.

[0019] The preforming stage employs cold die hot stamping technology. Through the combination of a cold die and a hot blank, the die operates at room temperature during the forming process, avoiding problems such as thermal fatigue, oxidation, and high-temperature softening. Therefore, the durability of the die is greatly improved, the maintenance cycle and service life are significantly extended, and the requirements for the high-temperature resistance of the die material are also reduced. After rapid external heating, the titanium alloy cone is quickly transferred to the cold die for preforming. In the preforming stage, this method fully leverages the advantages of cold die hot stamping technology, rapidly heating the titanium alloy cone and strictly controlling the heating time to suppress grain growth. The blank holder clamps the large end of the titanium alloy cone, providing radial constraint to prevent wrinkling and disordered material flow during forming. The punch applies axial loading, pressing the material at the large end of the titanium alloy cone into the mold cavity, replenishing the material and reducing the amount of expansion during subsequent hot gas pressure forming. In the preforming stage, the cone profile is adjusted to obtain the optimal shape and size of the preform, ensuring good wall thickness uniformity of the formed component and avoiding defects such as wrinkling and cracking. The preforming mold is always kept at room temperature, effectively avoiding mold thermal fatigue, thermal deformation, and oxidation caused by repeated thermal cycling, greatly extending the mold's service life, significantly reducing energy consumption, and effectively preventing mold thermal fatigue. Preforming utilizes a dynamic feeding method with axial-circumferential coordinated loading to control the billet configuration and create a local tensile-compressive composite stress field in the mid-temperature region. This avoids excessive thinning in certain areas and meets the large bulging requirements through active pushing of the feeding zone at the large end of the billet. This suppresses defects such as wrinkling and cracking in the component and optimizes the expansion rate in areas of severe deformation, thereby improving the geometric accuracy and wall thickness uniformity of the component. This enables high-precision, high-efficiency, and high-performance integral manufacturing of ultra-thin conical shells with complex generatrices and large cross-sectional differences. Specifically, it has the following advantages: (1) High forming accuracy: This method combines cold die hot stamping technology and integral internal pressure forming technology to precisely control the forming process in stages, thereby achieving fine control of the forming process. In the preforming stage, the titanium alloy cone is continuously and gradually preformed to obtain a preform; the titanium alloy cone is rapidly heated and the heating time is strictly controlled, which significantly suppresses phase transformation, grain coarsening and surface oxidation of the titanium alloy material, thereby improving the forming limit of the titanium alloy; (2) High production efficiency: The preforming stage of this invention adopts cold mold hot stamping technology. The preforming mold is at room temperature, eliminating the need to wait for the mold to heat up and maintain its temperature. Therefore, the production cycle can be significantly shortened, improving production efficiency. Compared with the traditional thermoforming process that requires heating the entire mold to a high temperature, there is no need to heat the mold, thus significantly reducing energy consumption. The mold is always at room temperature during preforming, effectively avoiding mold thermal fatigue, thermal deformation and oxidation caused by repeated thermal cycles, greatly extending the service life of the mold. (3) Good forming stability: This invention integrates axial-circumferential co-loading, cold die hot stamping and integral internal pressure forming technology, and precisely controls the forming process in stages. This forming method fundamentally suppresses defects such as wrinkling and cracking, and significantly optimizes the expansion rate of the area with severe deformation, thereby improving the geometric accuracy and wall thickness uniformity of the component. This invention realizes the high-performance integral manufacturing of titanium alloy large cross-section difference complex busbar ultrathin conical shell, breaks through the traditional process of "steel mold segmented hot stamping + welding", greatly reduces the stress concentration, micro-cracks and other defects introduced by welding, and improves the integrity and service reliability of titanium alloy large cross-section difference complex busbar ultrathin conical shell structure. Attached Figure Description

[0020] Figure 1 This is a flowchart of the integral forming method for ultrathin conical shells of complex busbars with large cross-sectional differences in titanium alloy according to the present invention; Figure 2 This is a schematic diagram of the titanium alloy ultra-thin conical shell part with a complex busbar and large cross-sectional difference according to the present invention; wherein, φD2 is the outer diameter of the large end of the titanium alloy ultra-thin conical shell part with a complex busbar and large cross-sectional difference, φD2 is the outer diameter of the small end of the titanium alloy ultra-thin conical shell part with a complex busbar and large cross-sectional difference, R1 is the local radius of the middle part of the titanium alloy ultra-thin conical shell part with a complex busbar and large cross-sectional difference, R2 is the local radius of the large end of the titanium alloy ultra-thin conical shell part with a complex busbar and large cross-sectional difference, and R3 is the local radius of the small end of the titanium alloy ultra-thin conical shell part with a complex busbar and large cross-sectional difference. Figure 3 This is a top view of the preforming mold pressing device of the present invention; Figure 4 This is a cross-sectional view of the preform mold of the present invention in the mold-closed state; Figure 5 This is a partial enlarged view of area D of the preforming mold of the present invention; Figure 6 This is a cross-sectional view of the preform mold of the present invention in the mold-opening state; Figure 7 This is a schematic diagram of the sector-shaped slab of the present invention; wherein, R1 is the radius of the large end of the sector-shaped slab, R2 is the radius of the small end of the sector-shaped slab, L is the width of the sector-shaped slab, and α is the circumferential angle corresponding to the sector-shaped slab; Figure 8 This is a schematic diagram of the temperature distribution of the induction heating device and the titanium alloy cone of the present invention; In the diagram, 1. Positioning plate; 2. Pressure block slider; 3. Wedge; 4. Upper slider; 5. Lower slider; 6. Back plate; 7. Base plate; 8. Adapter plate; 9. Guide post; 10. Punch; 11. Die; 12. Pressure ring; 13. Titanium alloy cone; 14. Clamping device; 15. Induction heating coil. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings, but the scope of protection of the present invention is not limited by the drawings. Example 1

[0022] Figure 1 The flowchart of the integral forming method for the ultrathin conical shell of complex busbar with large cross-sectional differences in titanium alloy according to the present invention is shown in the figure. The integral forming method for the ultrathin conical shell of complex busbar with large cross-sectional differences in titanium alloy according to the present invention specifically includes the following steps: (1) Rapid heating, such as Figure 7 As shown, titanium alloy sector-shaped slabs are rolled and welded into titanium alloy cones according to design parameters. The material of the titanium alloy cone is near- The titanium alloy cone is cut using a laser cutting machine, bent using a roller bending machine, rolled using a plate rolling machine, and welded using laser welding. An anti-oxidant is evenly sprayed onto the surface of the titanium alloy cone, and a release agent is evenly sprayed onto the mold surface, followed by thorough drying. A clamping device holds the large end of the titanium alloy cone, and the cone is then heated at a specific rate. Heat quickly to the preset temperature The temperature at the clamping end of the titanium alloy cone is The heat preservation time is less than Fully leverage the advantages of cold die hot stamping technology; the rapid heating employs induction heating, with a heating rate of... Preset temperature for 20℃ / s The temperature is 400℃, the holding time t1 is 30s, the clamping device of the heating equipment is located on both sides of the large end of the titanium alloy cone, which facilitates clamping the billet, and the temperature of the billet clamping end is 300℃ (T4). The non-contact temperature measuring instrument provides real-time feedback on the power output current to control the temperature of the titanium alloy cone. Figure 8 This is a schematic diagram of the temperature distribution of the induction heating device and the titanium alloy cone of the present invention; (2) Rapid transfer: The heated titanium alloy cone is rapidly transferred to a pre-forming mold at room temperature. The pre-forming mold includes a positioning plate, a blank holder slider, a wedge, an upper slider, a lower slider, a back plate, a bottom plate, a transition plate, a guide post, a punch, a die, and a blank holder ring. The die is mounted on the bottom plate, the bottom plate is mounted on the lower slider, the punch is bolted to the wedge, the wedge is bolted to the transition plate, the transition plate is bolted to the back plate, and the back plate is mounted on the upper slider. The die has a vertical guide post at its inner center, and a vertical guide groove is opened at the center of the punch. The guide groove and the guide post cooperate to limit and guide. The transition plate is bolted to the wedge, the positioning plate supports the blank holder slider, the wedge and the blank holder slider are in contact as a kinematic pair, and the blank holder ring is in contact with the titanium alloy cone. Figure 3-5 As shown; (3) Cold die hot stamping, closing the blank holder ring, pressing the large end of the titanium alloy cone, the punch is loaded along the axial direction, and continuous gradual preforming is performed to obtain the preform; specifically: first, the upper slider 4 moves down, and the wedge 3 moves down through the back plate 6 and the adapter plate 8. The blank holder slider 2 moves radially under the push of the wedge 3 to complete the blanking. Under the action of the blank holder slider 2 and the die 11, the large end of the titanium alloy cone 14 is pressed into the shape of a draw bead, which plays the role of providing radial constraint on the large end of the titanium alloy cone. The positioning plate 1 and the wedge 3 are in surface contact without mechanical connection; after the blanking is completed, the straight wall section of the wedge 3 contacts the blank holder slider 2. The blank holder slider 2 has no radial displacement and maintains the blanking state. The punch 10 continues to move down under the drive of the wedge 3, the adapter plate 8, the back plate 6 and the upper slider 4 to perform continuous gradual preforming.

[0023] (4) Weld the end cap to the small end of the preform, place it into the bulging mold, and adjust the mold temperature to T2, which is 700℃. (5) Hot gas pressure expansion and shaping: the large end of the preform is widened and sealed, and air is added and pressurized. The high-pressure air source is adjusted to the pressurization rate. The preform's inner cavity is pressurized to a gas pressure p1, using the high-pressure gas as a force transmission medium to cause the preform to expand and conform to the mold. During hot gas pressure expansion, the high-pressure gas inside the preform's inner cavity is carbon dioxide, and the pressurization rate is... The pressure is 0.01 MPa / s, and the gas pressure p1 is 3 MPa.

[0024] (6) After the preform is expanded and attached to the mold, the temperature inside the mold and the pressure inside the formed workpiece are kept constant. The workpiece is kept warm and pressure is maintained for a period of time to achieve high-pressure shaping. (7) Rapid switching between hot and cold gases: Low-temperature inert gas is introduced into the inner cavity of the formed workpiece for rapid cooling. Mold opening and part taking, such as Figure 6 As shown; introducing low-temperature inert gas allows the formed workpiece to cool rapidly and be demolded, preventing it from being seized by a mold with greater shrinkage. The temperature ranges from 20 to 200℃.

[0025] (8) Using a laser cutting machine to cut the end caps and process sections, an ultra-thin conical shell with a large cross-sectional difference and complex busbar of titanium alloy is obtained, such as Figure 2 As shown, this is to meet the product's size requirements. Example 2

[0026] The difference from Example 1 is that, The material of the titanium alloy cone in step (1) is The titanium alloy is welded using argon arc welding; the rapid heating employs induction heating, contact heating, or self-resistance heating, with a heating rate of... Preset temperature for 50℃ / s The temperature is 450℃, the holding time t1 is 50s, the clamping device of the heating equipment is located on both sides of the large end of the titanium alloy cone, which is convenient for clamping the billet, and the temperature of the billet clamping end is T4, which is 400℃; in step (4), T2 is 800℃; in step (5), the high pressure gas in the inner cavity of the preform during hot gas pressure expansion is nitrogen, and the pressurization rate is The pressure is 0.1 MPa / s, and the gas pressure p1 is 6 MPa. Example 3

[0027] The difference from Example 1 is that, In step (1), rapid heating is achieved using contact heating, with a heating rate of... Preset temperature for 100℃ / s The temperature is 500℃, the holding time t1 is 90s, the clamping device of the heating equipment is located on both sides of the large end of the titanium alloy cone, which is convenient for clamping the billet, and the temperature of the billet clamping end is T4, which is 450℃; in step (4), T2 is 900℃; in step (5), the high pressure gas in the inner cavity of the preform during hot gas pressure expansion is an inert gas, and the pressurization rate is The pressure is 0.2 MPa / s, and the gas pressure p1 is 10 MPa.

Claims

1. A method for integrally forming a titanium alloy large-section differential complex busbar ultra-thin conical shell, characterized in that, Specifically comprising the following steps: (1) fast heating, according to the design parameters, the titanium alloy fan-shaped plate blank is roll-welded into a titanium alloy cone cylinder, the clamping device clamps the large end of the titanium alloy cone cylinder, the titanium alloy cone cylinder is clamped at a heating rate to a predetermined temperature , the temperature of the clamped end of the titanium alloy cone cylinder is , and the holding time is less than ; (2) quickly transfer the heated titanium alloy cone cylinder to a preforming mold at room temperature; (3) cold mold hot stamping, close the edge ring, press the large end of the titanium alloy cone cylinder, load the punch in the axial direction, and perform continuous gradual preforming to obtain a preform; (4) weld the head at the small end of the preform and place it in the expansion mold, and adjust the mold temperature to T2; (5) Hot gas pressure bulging, the large end of the preform is expanded and sealed by a punch, and the high-pressure gas source is adjusted to increase the pressure at a rate The inner cavity of the preform is inflated and pressurized to a gas pressure p1, so that the preform is bulged and fitted to the mold; (6) after the preform is expanded and attached to the mold, the temperature and pressure in the mold are kept unchanged, and the formed workpiece is kept at high pressure for a period of time to make the formed workpiece high-pressure shaped; (7) The cold and hot gas is quickly converted, and the low-temperature inert gas is introduced into the inner cavity of the formed workpiece, and the workpiece is quickly cooled to , and the workpiece is taken out. (8) cut the head and process section to obtain a titanium alloy large-section differential complex bus ultra-thin conical shell.

2. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. The rapid heating in step (1) is by induction heating, contact heating or self-resistance heating, the heating rate is 20-100℃ / s to the predetermined temperature is 400-500℃, the holding time t1 is 30-90s, the clamping device of the heating equipment is located at both sides of the large end of the titanium alloy cone cylinder, and the temperature T4 of the clamped end of the blank is 300-450℃.

3. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. The material of the titanium alloy cone cylinder in step (1) is near α titanium alloy or β titanium alloy. The titanium alloy cone cylinder is cut by a laser cutting machine, bent by a roll bender, curled by a plate curling machine, and welded by laser welding or argon arc welding.

4. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. In step (1), the titanium alloy cone cylinder is evenly sprayed with an anti-oxidant after being cleaned, the mold surface is evenly sprayed with a release agent, and is fully dried.

5. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. In step (4), the T2 is 700-900°C.

6. The method of claim 1, wherein: The high pressure gas in the preform cavity during the hot gas pressure forming in step (5) is one of carbon dioxide, nitrogen, and inert gas, the pressurizing rate is 0.01-0.2 MPa / s, and the gas pressure p1 is 2-10 MPa.

7. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. In step (7) the is 20-200°C.

8. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. In step (8), the cutting uses a laser cutting machine to cut off the process section of the formed workpiece to meet the size requirements of the product.

9. The method of claim 2, wherein the titanium alloy large-section differential complex busbar ultra-thin conical shell is integrally formed. In step (1), the clamping device clamps the large end of the titanium alloy cone cylinder, and the induction heating coil surrounds the outside of the titanium alloy cone cylinder.

10. The method of claim 1, wherein the titanium alloy large-section differential complex busbar ultra-thin conic shell is integrally formed. In step (2), the preforming mold includes a positioning disc, an edge pressing slider, a wedge, an upper slider, a lower slider, a back plate, a bottom plate, an adapter plate, a guide column, a punch, a concave die, and an edge ring; the concave die is installed on the bottom plate, the bottom plate is installed on the lower slider, the punch is bolted to the wedge, the wedge is bolted to the adapter plate, the adapter plate is bolted to the back plate, and the back plate is installed on the upper slider; the inside of the concave die has a vertical guide column, the center of the punch is provided with a vertical guide slot, the guide slot and the guide column are matched and limited in direction; the adapter plate is connected with the wedge through bolts, the positioning disc supports the edge pressing slider, the wedge and the edge pressing slider are in contact as a pair of moving parts, and the edge ring is in contact with the titanium alloy cone cylinder.

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