Internal high-pressure hydraulic forming process for special-shaped light hollow component

Abstract

The invention discloses a special-shaped light hollow component internal high-pressure hydraulic forming process which comprises a base, the top face of the base is fixedly connected with a supporting frame, a driving device is arranged in the supporting frame, the bottom end of the driving device is fixedly connected with an upper roller, and the top face of the base is fixedly connected with a lower roller. A first push cylinder and a second push cylinder are arranged on the top face of the base, an auxiliary hydraulic mechanism is arranged on the side face of the upper roller, an auxiliary liquid discharging mechanism is arranged on the arc face of the second push cylinder, the auxiliary hydraulic mechanism can conduct air blowing and dust removing on the bottom face of the upper roller, a large area of dust can be rapidly blown away through the air blowing and dust removing mode, and compared with manual wiping, the wiping efficiency is improved. The cleaning efficiency can be greatly improved, time is saved, the auxiliary liquid discharging mechanism can discharge liquid in the hollow part into the collecting groove in the lower roller, so that the liquid is recycled, waste of the liquid is reduced, and maximum utilization of resources is achieved.

Description

Technical Field

[0001] The invention relates to the field of hydraulic forming, in particular to a high-pressure hydraulic forming process for a special-shaped light-body hollow component. Background Art

[0002] With the development of modern science and technology, the requirements for high-speed and high-maneuverability performance are constantly increasing, and higher and higher requirements are put forward for the lightweight and long life of components. At the same time, reducing the dead weight of cars and aircraft is one of the measures to reduce energy consumption and pollution emissions. The main way to lightweight is to use lightweight materials and lightweight structures. Lightweight materials include aluminum alloys, magnesium alloys, titanium alloys and composite materials. In industrial manufacturing, forming and forming integration is the best technical approach to simultaneously obtain the best performance of components and improve production efficiency. The aerospace field urgently needs to adopt a large number of large-scale integral complex thin-walled shells with very significant structural benefits. The main forms of lightweight structures include integral structures, thin shells and hollow variable sections. It has an unparalleled role in reducing structural weight, improving structural efficiency, improving structural reliability, and increasing the life of the body.

[0003] When the hydraulic forming device is used, the working environment is not in a closed state, that is, dust particles in the air will fly and adhere to the surface of the roller during the hydraulic process. In addition, some raw materials will also have some tiny particles or debris on the surface, which will fall off and adhere to the roller during the hydraulic pressure. In the prior art, the roller is usually wiped manually using a cleaning cloth or a brush with a cleaning agent to remove dust and dirt. Manual wiping is a time-consuming task, which will result in a slow cleaning speed, thereby affecting production efficiency, and manual wiping cannot completely remove the dust and dirt. Removing stubborn dirt on the rollers and dust in small gaps results in unsatisfactory cleaning effects. In addition, after the hollow parts are hydraulically formed, since they use internal high-pressure liquid filling forming technology, there will still be liquid residue inside the hollow parts after they are formed. When the seals at both ends of the hollow parts are opened, the high pressure inside will cause the liquid inside the hollow parts to be ejected and sprayed onto the work surface or even the staff, resulting in stains or water stains on the work surface. The liquid will be ejected onto the staff, causing impact injuries and other adverse effects.

[0004] Therefore, a high-pressure hydraulic forming process for special-shaped lightweight hollow components is proposed to solve the above problems. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to propose a high-pressure hydraulic forming process for special-shaped lightweight hollow components to solve the problem that the prior art manually uses tools such as cleaning cloths or brushes to wipe the rollers with cleaning agents to remove dust and dirt, and the liquid inside the hollow parts is ejected and sprayed onto the work surface or even on the staff.

[0006] To achieve the above object, the present invention provides the following technical solution: a high pressure hydraulic forming process for a special-shaped lightweight hollow component, comprising the following steps: Step 1: Determine the forming process parameters during the internal high pressure hydraulic forming process, including the upper cavity pressing amount and the hollow component forming internal pressure; Step 2: placing the hollow component in a groove on the lower cavity of the high pressure hydraulic forming device in the hollow component; Step 3: close the upper and lower cavities, and then place the hollow member in the grooves on the upper and lower cavities to form a cavity with closed sides and open ends. Due to the effect of the sealing ring, the outer wall of the hollow member and the cavity wall form a closed cavity. Step 4: inject fluid medium into the fluid medium injection channel through a pump and an ultra-high pressure fluid generating device, so that the fluid medium fills the closed cavity and generates high pressure. The fluid medium is used as a pressure transmission medium to cause plastic deformation of the hollow component in the closed cavity inward. Step 5: After forming, release the pressure, open the upper cavity and the lower cavity, and take out the hollow component.

[0007] As an improvement, the fluid medium is oil or emulsion, the ultra-high pressure in the ultra-high pressure fluid generating device refers to a pressure ≥100MPa, that is, the maximum pressure generated by this device is ≥100MPa, and the high pressure refers to a pressure ≥30MPa. The pressure for forming hollow components by this method is ≥30MPa.

[0008] As an improvement, the high-pressure hydraulic forming device in the hollow component includes a base, the top surface of the base is fixedly connected to a support frame, a driving device is arranged inside the support frame, the bottom end of the driving device is fixedly connected to an upper rolling roller, the top surface of the base is fixedly connected to a lower rolling roller, the top surface of the base is provided with a first push cylinder and a second push cylinder, the side surface of the upper rolling roller is provided with an auxiliary hydraulic mechanism, and the arc surface of the second push cylinder is provided with an auxiliary drainage mechanism.

[0009] As an improvement, the auxiliary hydraulic mechanism includes a rack, which is fixedly connected to the inner wall of the support frame, and the side of the upper roller is fixedly connected to a first auxiliary block, and the side of the first auxiliary block is rotatably connected to a bevel gear group, which is meshingly connected to the rack, and the end of the bevel gear group away from the rack is fixedly connected to a rotating shaft, and the rotating shaft passes through and is rotatably connected to the interior of the first auxiliary block.

[0010] As an improvement, the end of the rotating shaft away from the bevel gear group is fixedly connected to a rotating block, the top surface of the first auxiliary block is fixedly connected to a first auxiliary plate, the side of the first auxiliary block away from the rack is rotatably connected to a rotating rod, a first telescopic rod is rotatably connected between the first auxiliary plate and the rotating rod, a return spring is provided on the outer surface of the first telescopic rod, and a wedge block is fixedly connected to a side of the rotating rod close to the rotating block.

[0011] As an improvement, a plurality of first protrusions are fixedly connected to the inner wall of the support frame, a first cylinder is fixedly connected to the top surface of the upper roller, a sliding rod is slidably connected to the interior of the first cylinder, and two return springs are fixedly connected between the sliding rod and the first cylinder, an exhaust pipe is fixedly connected through the arc surface of the bottom end of the first cylinder, and the exhaust pipe is directly opposite to the bottom surface of the upper roller.

[0012] As an improvement, the auxiliary drainage mechanism includes a first drainage pipe, which passes through and is fixedly connected to the arc surface of the bottom end of the second push cylinder, an electric telescopic rod is fixedly connected to the arc surface of the second push cylinder, the end of the electric telescopic rod away from the second push cylinder is fixedly connected to the second cylinder, the interior of the second cylinder is a cavity, the other end of the first drainage pipe is fixedly connected to the arc surface of the second cylinder, the interior of the second cylinder is slidably connected to a push rod, and the outer surface of the push rod is fixedly connected to a second protrusion.

[0013] As an improvement, the side of the lower roller close to the second push cylinder is fixedly connected to an auxiliary frame, the interior of the auxiliary frame is provided with an arc groove, and a baffle is slidably connected to the interior of the arc groove, the interior of the auxiliary frame is rotatably connected to a rotating disk, the side of the rotating disk close to the second push cylinder is fixedly connected to a rotating disk, and a threaded groove is provided inside the rotating disk, the side of the auxiliary frame away from the third cylinder is fixedly connected to the second drainage pipe, and the baffle is slidably connected to the interior of the second drainage pipe.

[0014] Compared with the prior art, the present invention provides a high pressure hydraulic forming process for special-shaped lightweight hollow components, which has the following beneficial effects: 1. The sliding rod moves back and forth inside the first cylinder by moving the sliding rod up and down, thereby forming an airflow to blow and clean the bottom surface of the upper roller. The air blowing method can quickly blow away dust over a large area. Compared with manual wiping, it can greatly improve cleaning efficiency and save time. Air blowing cleaning avoids direct contact between the cleaning tool and the surface of the pressure plate during manual wiping, and reduces possible scratches or damage to the surface of the upper roller. The airflow can reach some corners and gaps that are difficult to reach by manual wiping, and can remove dust more comprehensively, ensuring a more thorough cleaning effect. Air blowing cleaning does not require cumbersome wiping actions, which reduces labor intensity and reduces labor costs.

[0015] 2. The rotation of the bevel gear set causes the rotating rod to lightly knock on the upper roller, which can cause it to vibrate, thereby vibrating the stubborn impurities adhering to the upper roller to loosen them, and then clean them with air blowing. The vibration can promote the redistribution of stress inside the material, which helps to eliminate or reduce the internal stress concentration caused by the rolling process.

[0016] 3. By extending the electric telescopic rod, the liquid in the hollow part can be discharged into the collection tank inside the lower roller, so that the liquid can be recycled, thereby reducing the waste of liquid and maximizing the utilization of resources. Recycling the liquid in the hollow part can avoid the safety hazards caused by liquid injection and protect the health and safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional side view of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of another angle of the overall structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 This is a schematic diagram of the first cylinder connection relationship structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the first cylinder of the present invention; Figure 6 It is a schematic diagram of the structure of the auxiliary liquid discharge mechanism of the present invention; Figure 7 This is a schematic diagram of the connection relationship structure of the auxiliary frame of the present invention; Figure 8 It is a structural schematic diagram of the baffle connection relationship of the present invention.

[0018] In the figure: 1. Base; 11. Support frame; 12. Driving device; 13. Upper roller; 14. Lower roller; 15. First push cylinder; 16. Second push cylinder; 2. Auxiliary hydraulic mechanism; 21. Rack; 22. First auxiliary block; 23. Bevel gear set; 24. Rotating shaft; 25. Rotating block; 26. First auxiliary plate; 27. First telescopic rod; 28. Rotating rod; 29. ​​First convex block; 210. First cylinder; 211. Sliding rod; 212. Exhaust pipe; 3. Auxiliary liquid discharge mechanism; 31. First liquid discharge pipe; 32. Electric telescopic rod; 33. Second cylinder; 34. Push rod; 35. Auxiliary frame; 36. Third cylinder; 37. Rotating disk; 38. Baffle; 39. Second liquid discharge pipe; 310. Second protrusion. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention is further described in detail below based on the accompanying drawings and embodiments. Embodiment 1

[0021] A high pressure hydraulic forming process for a special-shaped lightweight hollow component, comprising the following steps: Step 1: Determine the forming process parameters during the internal high pressure hydraulic forming process, including the upper cavity pressing amount and the hollow component forming internal pressure; Step 2: placing the hollow component in a groove on the lower cavity of the high pressure hydraulic forming device in the hollow component; Step 3: close the upper and lower cavities, and then place the hollow member in the grooves on the upper and lower cavities to form a cavity with closed sides and open ends. Due to the effect of the sealing ring, the outer wall of the hollow member and the cavity wall form a closed cavity. Step 4: inject the fluid medium into the fluid medium injection channel through the pump and the ultra-high pressure fluid generating device, so that the fluid medium fills the closed cavity and generates high pressure. The fluid medium is used as the pressure transmission medium to plastically deform the hollow component in the closed cavity. The fluid medium is oil or emulsion. The ultra-high pressure in the ultra-high pressure fluid generating device refers to a pressure ≥100MPa, that is, the maximum pressure generated by this device is ≥100MPa. High pressure refers to a pressure ≥30MPa. The pressure for forming the hollow component by this method is ≥30MPa. Step 5: After forming, release the pressure, open the upper cavity and the lower cavity, and take out the hollow component. Embodiment 2

[0022] Please refer to Figures 1 to 5 As shown: In order to solve the problems mentioned in the technical solution, an embodiment of the present application provides a high-pressure hydraulic forming process for special-shaped lightweight hollow components. The high-pressure hydraulic forming device for hollow components includes a base 1, the top surface of the base 1 is fixedly connected to a support frame 11, a driving device 12 is arranged inside the support frame 11, the bottom end of the driving device 12 is fixedly connected to an upper roller 13, the top surface of the base 1 is fixedly connected to a lower roller 14, the top surface of the base 1 is provided with a first push cylinder 15 and a second push cylinder 16, the side of the upper roller 13 is provided with an auxiliary hydraulic mechanism 2, and the arc surface of the second push cylinder 16 is provided with an auxiliary drainage mechanism 3.

[0023] The auxiliary hydraulic mechanism 2 includes a rack 21, which is fixedly connected to the inner wall of the support frame 11. The side of the upper roller 13 is fixedly connected to a first auxiliary block 22. The side of the first auxiliary block 22 is rotatably connected to a bevel gear set 23. The bevel gear set 23 is meshed with the rack 21. One end of the bevel gear set 23 away from the rack 21 is fixedly connected to a rotating shaft 24, and the rotating shaft 24 passes through and is rotatably connected to the inside of the first auxiliary block 22.

[0024] One end of the rotating shaft 24 away from the bevel gear set 23 is fixedly connected to the rotating block 25, the top surface of the first auxiliary block 22 is fixedly connected to the first auxiliary plate 26, the side of the first auxiliary block 22 away from the rack 21 is rotatably connected to the rotating rod 28, a first telescopic rod 27 is rotatably connected between the first auxiliary plate 26 and the rotating rod 28, a return spring 1 is provided on the outer surface of the first telescopic rod 27, and a wedge block is fixedly connected to the side of the rotating rod 28 close to the rotating block 25.

[0025] A plurality of first protrusions 29 are fixedly connected to the inner wall of the support frame 11, a first cylinder 210 is fixedly connected to the top surface of the upper roller 13, a slide rod 211 is slidably connected inside the first cylinder 210, and a return spring 2 is fixedly connected between the slide rod 211 and the first cylinder 210, an exhaust pipe 212 is fixedly connected through the arc surface of the bottom end of the first cylinder 210, and the exhaust pipe 212 is directly opposite to the bottom surface of the upper roller 13.

[0026] Among them: a cavity is opened inside the lower roller 14, and a drainage hole is reserved, a hot air pipe and a liquid inlet pipe are arranged inside the second push cylinder 16, a return spring 1 is arranged on the outer surface of the first telescopic rod 27, a wedge block is fixedly connected to the side of the rotating rod 28 close to the rotating block 25, a return spring 2 is fixedly connected between the sliding rod 211 and the first cylinder 210, a rubber hammer is arranged at the bottom end of the rotating rod 28, which is mainly used to knock the upper roller 13, and the exhaust pipe 212 is opposite to the bottom surface of the upper roller 13, and the nozzle opening of the exhaust pipe 212 is relatively small.

[0027] Compared with the comparative document, through the implementation of this embodiment, the sliding rod 211 moves back and forth inside the exhaust pipe 212, thereby forming an airflow to blow and clean the bottom surface of the upper roller 13. The air blowing dust removal method can quickly blow away a large area of ​​dust. Compared with manual wiping, it can greatly improve the cleaning efficiency and save time. Air blowing cleaning avoids direct contact between the cleaning tool and the surface of the pressure plate during manual wiping, reducing possible scratches or damage to the surface of the upper roller 13.

[0028] For further examples, please refer to Figures 6 to 8 As shown: The auxiliary drainage mechanism 3 includes a first drainage pipe 31, which passes through and is fixedly connected to the arc surface of the bottom end of the second push cylinder 16. An electric telescopic rod 32 is fixedly connected to the arc surface of the second push cylinder 16. The end of the electric telescopic rod 32 away from the second push cylinder 16 is fixedly connected to the second cylinder 33. The interior of the second cylinder 33 is a cavity. The other end of the first drainage pipe 31 is fixedly connected to the arc surface of the second cylinder 33. A push rod 34 is slidably connected to the interior of the second cylinder 33, and a second protrusion 310 is fixedly connected to the outer surface of the push rod 34.

[0029] The lower roller 14 is fixedly connected to an auxiliary frame 35 on one side close to the second push cylinder 16, an arc groove is provided inside the auxiliary frame 35, and a baffle 38 is slidably connected inside the arc groove, the auxiliary frame 35 is rotatably connected to a rotating disk 37 inside, the rotating disk 37 is fixedly connected to one side close to the second push cylinder 16, and a threaded groove is provided inside the rotating disk 37, the auxiliary frame 35 is fixedly connected to a second drainage pipe 39 on one side away from the third cylinder 36, and the baffle 38 is slidably connected inside the second drainage pipe 39.

[0030] Among them: the front half of the second push cylinder 16 is set to a cavity state, mainly used for storing liquid medium, the first drain pipe 31 is a hose, and the first drain pipe 31 is provided with a sensing device. When the first drain pipe 31 is not taking in water, the sensing device drives the hot air pipe to input hot air, the auxiliary frame 35 is provided with an arc groove, the rotating disk 37 is provided with a threaded groove, and the second protrusion 310 can drive the third cylinder 36 to rotate, the push rod 34 is provided with an L-shaped through hole, and a reset spring three is fixedly connected between the push rod 34 and the second cylinder 33.

[0031] Compared with the comparative document, through the implementation of this embodiment, the liquid in the hollow member can be discharged into the collecting tank inside the lower roller 14 by extending the electric telescopic rod 32, so that the liquid can be recycled, thereby reducing the waste of liquid and maximizing the utilization of resources. Recycling the liquid in the hollow member can avoid the safety hazards caused by liquid ejection and protect the health and safety of the operator.

[0032] Everything in the above example works like this: In the initial state: the upper roller 13 is located at the top of the inner wall of the support frame 11 , and one end of the push rod 34 with an opening is located outside the second cylinder 33 .

[0033] The following is the working process of the auxiliary hydraulic mechanism 2 to remove dust from the bottom surface of the upper roller 13: When in use, while the driving device 12 controls the upper roller 13 to move downward, it will drive the first cylinder 210 to move downward together. Since the inner wall side of the support frame 11 is fixedly connected with the first protrusion 29, when the first cylinder 210 moves downward, it will drive the sliding rod 211 to move downward together. When the sliding rod 211 touches the protrusion of the first protrusion 29, the first protrusion 29 will push the sliding rod 211 to move toward the inside of the first cylinder 210, thereby squeezing the return spring 1, and the sliding rod 211 is provided with a piston sheet at one end close to the first cylinder 210, that is, when the sliding rod 211 is squeezed toward the inside of the first cylinder 210, it will push the air in the first cylinder 210 to be discharged from the exhaust pipe 212. Since the exhaust pipe 212 is facing the bottom surface of the upper roller 13 and the exhaust pipe 212 is facing the bottom surface of the upper roller 13, the exhaust pipe 212 is The nozzle opening of the air cylinder 212 is relatively small. When the slide bar 211 is pushed into the first cylinder 210, the airflow of the first cylinder 210 can be concentrated and ejected faster, thereby forming an airflow to blow and clean the bottom surface of the upper roller 13. The method of blowing and removing dust can quickly blow away dust over a large area. Compared with manual wiping, it can greatly improve the cleaning efficiency and save time. Air blowing cleaning avoids direct contact between the cleaning tool and the surface of the pressing plate during manual wiping, reducing possible scratches or damage to the surface of the upper roller 13. The airflow can reach some corners and gaps that are difficult to reach by manual wiping, and can remove dust more comprehensively, ensuring a more thorough cleaning effect. Air blowing cleaning does not require cumbersome wiping actions, which reduces labor intensity and reduces labor costs. At the same time, the upper roller 13 moves downward and drives the first auxiliary block 22 to move downward together. The inner wall of the side of the support frame 11 away from the first protrusion 29 is fixedly connected with a rack 21, and the rack 21 is meshed with the bevel gear set 23, that is, the first auxiliary block 22 will rotate when it moves downward, and the rotation of the bevel gear set 23 drives the rotating shaft 24 to rotate, and the rotation of the rotating shaft 24 drives the rotating block 25 fixedly connected thereto to rotate. Since a wedge block is provided on a side of the rotating rod 28 close to the rotating block 25, and when the rotating block 25 rotates, the rotating block 25 will push the wedge block to move in the direction away from the rotating block 25, and then push the rotating rod 28 to move in the direction away from the upper roller 13, since the rotating rod 28 is meshed with the first A first telescopic rod 27 is rotatably connected between the auxiliary plates 26, and a second reset spring is provided on the outer surface of the first telescopic rod 27, that is, when the rotating rod 28 rotates in the direction away from the rotating block 25, the second reset spring will be squeezed. When the rotating rod 28 is not pushed by the rotating block 25, the second reset spring is no longer squeezed and then restored, driving the rotating rod 28 to move in the direction close to the upper roller 13, and then knocking the upper roller 13 to make it vibrate, thereby vibrating the stubborn impurities adhering to the upper roller 13 to loosen them, and cleaning them with air blowing. The vibration can promote the redistribution of stress inside the material, which helps to eliminate or reduce the internal stress concentration caused by the rolling process.

[0034] Please refer to the above working process Figures 1 to 5 .

[0035] The following is the working process of the auxiliary liquid discharge mechanism 3 to discharge the liquid in the hollow component: During use, when the upper roller 13 rolls the hollow member and the hollow member is formed, there is still liquid in the interior of the hollow member, and since the front half of the second push cylinder 16 is a cavity, that is, there is also liquid in the front half of the second push cylinder 16, and at this time, the first push cylinder 15 and the second push cylinder 16 are not taken out of the hollow member. Then, the staff controls the electric telescopic rod 32 to extend, and the extension of the electric telescopic rod 32 will drive the second cylinder 33 and the push rod 34 to move toward the direction close to the lower roller 14, and then the push rod 34 will contact the third cylinder 36 and push the second protrusion 310 deep into the interior of the third cylinder 36, because the interior of the third cylinder 36 is provided with a threaded groove, and the second protrusion 310 can slide inside it, that is, the second protrusion 310 moves inside the third cylinder 36. The third cylinder 36 rotates and drives the rotating disk 37 fixedly connected thereto to rotate. Since an arc groove is provided inside the rotating disk 37, and the baffle 38 can be driven to slide, that is, the rotating disk 37 drives the baffle 38 to expand outward while rotating. At this time, the push rod 34 continues to squeeze and moves itself toward the inside of the second cylinder 33. At this time, the L-shaped through hole provided by the push rod 34 coincides with the first liquid discharge pipe 31, and then the liquid in the hollow member is discharged into the cavity inside the lower roller 14, and discharged through the liquid discharge hole reserved by the lower roller 14, so as to be recycled, thereby reducing the waste of liquid and realizing the maximum utilization of resources. Recycling the liquid in the hollow member can avoid the safety hazard caused by the liquid ejection and protect the health and safety of the operator. Since the first liquid discharge pipe 31 is provided with a sensing device inside, that is, when the first liquid discharge pipe 31 is not taking in water, the sensing device drives the hot air pipe to input hot air into the hollow component through the first push cylinder 15. The function of the hot air is to accelerate evaporation and carry away the evaporated liquid molecules through the action of the airflow, thereby reducing the residue inside the hollow component, avoiding the residual liquid from affecting the performance or quality of the hollow component, and helping to ensure the dryness and cleanliness of the inside of the hollow component.

[0036] Please refer to the above working process Figures 6 to 8 .

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high pressure hydraulic forming process for a special-shaped lightweight hollow component, characterized in that: The following steps are involved: Step 1: Determine the forming process parameters during the internal high pressure hydraulic forming process, including the upper cavity pressing amount and the hollow component forming internal pressure; Step 2: placing the hollow component in a groove on the lower cavity of the high pressure hydraulic forming device in the hollow component; Step 3: close the upper and lower cavities, and then place the hollow member in the grooves on the upper and lower cavities to form a cavity with closed sides and open ends. Due to the effect of the sealing ring, the outer wall of the hollow member and the cavity wall form a closed cavity. Step 4: inject fluid medium into the fluid medium injection channel through a pump and an ultra-high pressure fluid generating device, so that the fluid medium fills the closed cavity and generates high pressure. The fluid medium is used as a pressure transmission medium to cause plastic deformation of the hollow component in the closed cavity inward. Step 5: After forming, release the pressure, open the upper cavity and the lower cavity, and take out the hollow component.

2. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 1, characterized in that: The fluid medium is oil or emulsion. The ultra-high pressure in the ultra-high pressure fluid generating device refers to a pressure ≥100MPa, that is, the maximum pressure generated by this device is ≥100MPa. The high pressure refers to a pressure ≥30MPa. The pressure for forming hollow components by this method is ≥30MPa.

3. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 1, characterized in that: A high-pressure hydraulic forming device for a hollow component comprises a base (1), the top surface of the base (1) is fixedly connected to a support frame (11), a driving device (12) is arranged inside the support frame (11), an upper roller (13) is fixedly connected to the bottom end of the driving device (12), a lower roller (14) is fixedly connected to the top surface of the base (1), a first push cylinder (15) and a second push cylinder (16) are arranged on the top surface of the base (1), an auxiliary hydraulic mechanism (2) is arranged on the side surface of the upper roller (13), and an auxiliary liquid discharge mechanism (3) is arranged on the arc surface of the second push cylinder (16).

4. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 3, characterized in that: The auxiliary hydraulic mechanism (2) comprises a rack (21), the rack (21) being fixedly connected to the inner wall of the support frame (11), the side of the upper roller (13) being fixedly connected to a first auxiliary block (22), the side of the first auxiliary block (22) being rotatably connected to a bevel gear set (23), the bevel gear set (23) being meshingly connected to the rack (21), the end of the bevel gear set (23) away from the rack (21) being fixedly connected to a rotating shaft (24), and the rotating shaft (24) passing through and rotatably connected to the interior of the first auxiliary block (22).

5. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 4, characterized in that: One end of the rotating shaft (24) away from the bevel gear set (23) is fixedly connected to a rotating block (25); a top surface of the first auxiliary block (22) is fixedly connected to a first auxiliary plate (26); a surface of the first auxiliary block (22) away from the rack (21) is rotatably connected to a rotating rod (28); a first telescopic rod (27) is rotatably connected between the first auxiliary plate (26) and the rotating rod (28); a return spring 1 is provided on an outer surface of the first telescopic rod (27); and a wedge block is fixedly connected to a surface of the rotating rod (28) close to the rotating block (25).

6. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 5, characterized in that: A plurality of first protrusions (29) are fixedly connected to the inner wall of the support frame (11); a first cylinder (210) is fixedly connected to the top surface of the upper roller (13); a sliding rod (211) is slidably connected to the interior of the first cylinder (210); and a second return spring is fixedly connected between the sliding rod (211) and the first cylinder (210); an exhaust pipe (212) is fixedly connected and penetrates the arc surface at the bottom end of the first cylinder (210); and the exhaust pipe (212) is directly opposite to the bottom surface of the upper roller (13).

7. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 3, characterized in that: The auxiliary liquid discharge mechanism (3) comprises a first liquid discharge pipe (31), the first liquid discharge pipe (31) passes through and is fixedly connected to the bottom arc surface of the second push cylinder (16), an electric telescopic rod (32) is fixedly connected to the arc surface of the second push cylinder (16), one end of the electric telescopic rod (32) away from the second push cylinder (16) is fixedly connected to the second cylinder (33), the interior of the second cylinder (33) is a cavity, the other end of the first liquid discharge pipe (31) is fixedly connected to the arc surface of the second cylinder (33), the interior of the second cylinder (33) is slidably connected to a push rod (34), and the outer surface of the push rod (34) is fixedly connected to a second protrusion (310).

8. The high pressure hydraulic forming process for a special-shaped lightweight hollow component according to claim 7, characterized in that: The lower roller (14) is fixedly connected to an auxiliary frame (35) on a side close to the second push cylinder (16), an arc groove is provided inside the auxiliary frame (35), and a baffle (38) is slidably connected inside the arc groove. The auxiliary frame (35) is rotatably connected to a rotating disk (37) inside the auxiliary frame (35), a side close to the second push cylinder (16) is fixedly connected to the rotating disk (37), and a threaded groove is provided inside the rotating disk (37), and a side of the auxiliary frame (35) away from the third cylinder (36) is fixedly connected to a second liquid discharge pipe (39), and the baffle (38) is slidably connected inside the second liquid discharge pipe (39).

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