How to use large liquid-filled impact composite forming device

Abstract

The invention discloses a method for using a large-scale liquid-filled impact composite forming device, comprising a lower beam, a workbench, a middle beam, a lower water-cutting chamber, an upper beam, a liquid-filled sealing plate, an upper water-cutting chamber, an impact hammer, and an impact power head; the liquid-filled sealing plate seals the upper port of the lower water-cutting chamber, the middle beam moves upward through a lifting cylinder, and the liquid-filled sealing plate is pressed against the bottom surface of the upper water-cutting chamber, the lower top cylinder lifts the workbench to seal the lower port of the lower water-cutting chamber, and high-pressure liquid is filled in the lower water-cutting chamber to allow a workpiece blank to be liquid-filled and stretched to form most features; the liquid-filled sealing plate opens the upper port of the lower water-cutting chamber, the lifting cylinder and the lower top cylinder allow the workbench and the middle beam to move upward at the same time, so that the upper water-cutting chamber and the lower water-cutting chamber form a complete water chamber, water is filled in the complete water chamber to a specified water level, and the impact power head pushes the impact hammer downward to implement high-energy and high-speed impact forming, so as to solve the problem that local feature sizes are difficult to form in one go, reduce production costs, improve the position accuracy of local feature sizes, and improve the overall performance of parts.

Description

Technical Field

[0001] The invention relates to the technical field of metal pressure processing, and in particular to a method for using a large-scale liquid-filled impact composite forming device. Background Art

[0002] In the fields of aerospace, automobiles, etc., the requirements for lightweight structure, functionality and integrity are getting higher and higher. Therefore, functional parts with complex structures are widely used. For example, the inner panel of an automobile is a complex curved surface with edges and corners. In the liquid forming process, due to the limitation of the pressure of the liquid forming medium, although most of the features such as bosses and ribs have been formed by mold, the sharp corners and bends cannot be fully formed; for complex parts with most of the features already formed by liquid, in order to form local features, simply increasing the liquid forming pressure will inevitably greatly increase the tonnage of the equipment and increase the production cost. If other processes are assisted after forming, the process will be increased and secondary assembly errors will occur. This method cannot guarantee the positional accuracy of the local feature size, thereby affecting the overall performance of the part. In severe cases, the entire large part will be scrapped, resulting in a waste of resources; therefore, the above technical problems need to be improved. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a large-scale liquid-filled impact composite forming device, which can successively implement large-scale composite forming of a liquid-filled forming process and a high-energy and high-speed forming process.

[0004] A large-scale liquid-filled impact composite forming device according to an embodiment of the present invention comprises a lower beam, a workbench, a middle beam, a lower water-cutting chamber, a liquid-filled sealing plate, an upper beam, an upper water-cutting chamber, an impact hammer head, and an impact power head; a lower top oil cylinder is arranged in the lower beam; the workbench is located above the lower beam, and the workbench is lifted and lowered by the piston rod of the lower top oil cylinder; the middle beam is located above the workbench; the lower water-cutting chamber is arranged in the middle beam, and the upper and lower ends of the lower water-cutting chamber are respectively opened, and the inner wall of the lower water-cutting chamber is surrounded by horizontal holes, the liquid-filled sealing plate is arranged on the top surface of the middle beam, and the horizontal holes Water is introduced through the water inlet channel on the middle beam or water is discharged through the water outlet channel; the liquid-filled sealing plate is used to open or close the upper port of the lower water-cutting chamber; a lifting cylinder is installed on the top of the upper beam, and the piston rod of the lifting cylinder passes through the upper beam and is fixedly connected to the middle beam; the upper water-cutting chamber is installed in the upper beam, and the upper and lower ends of the upper water-cutting chamber are respectively opened, and the lower port of the upper water-cutting chamber corresponds to the position of the upper port of the lower water-cutting chamber; the impact hammer head extends into the upper water-cutting chamber and impacts downward in the upper water-cutting chamber; the impact power head provides thrust for the impact hammer head.

[0005] A large-scale liquid-filled impact composite forming device according to an embodiment of the present invention has at least the following beneficial effects:

[0006] The liquid-filled sealing plate moves to the center of the middle beam to close the upper port of the lower water-cutting chamber. The middle beam moves upward through the lifting cylinder to press the liquid-filled sealing plate against the bottom surface of the upper water-cutting chamber. The piston rod of the lower lifting cylinder lifts the workbench equipped with the mold and the workpiece blank against the bottom surface of the lower water-cutting chamber, so that the lower port of the lower water-cutting chamber is closed, and the lower water-cutting chamber is filled with liquid of the required pressure for forming, so that the workpiece blank is filled with liquid to stretch and form most of the features, and the liquid-filled forming is completed; the liquid-filled sealing plate opens the upper port of the lower water-cutting chamber by moving, and the lifting cylinder and the lower lifting cylinder make the workbench and the middle beam move upward at the same time, so that the upper port of the lower water-cutting chamber is pressed against the lower port of the upper water-cutting chamber, so that the upper water-cutting chamber is opened. Together with the lower water cut-off chamber, a complete water chamber is formed. Water is filled in the complete water chamber to a specified water level. The impact power head pushes the impact hammer downward to make the impact hammer impact the liquid in the complete water chamber, which can implement high-energy and high-speed impact forming on the workpiece blank, so that the workpiece blank can be formed with local small features; the device can successively implement the liquid filling forming process and the high-energy and high-speed forming process to solve the problem that the liquid filling forming technology is difficult to form local feature sizes such as small concave angles and small indentations at one time, avoid increasing the tonnage of the equipment, reduce production costs, improve the position accuracy of local feature sizes, improve the overall performance of parts, and provide a liquid filling forming area of ​​1000000mm 2 The above is a large-scale liquid-filled impact composite forming device with a liquid-filled forming force of up to 5000T and an impact forming energy of up to 750000J.

[0007] According to some embodiments of the present invention, the workbench includes a tabletop and a supporting base, a mobile workbench is mounted on the outer surface of the supporting base, the mobile workbench supports the tabletop, guide plates are fixed at the bottom of the left and right sides of the mobile workbench, a slide rail cooperating with the guide plate is provided at the top of the lower beam, and the slide rail extends forward of the lower beam; a push-die cylinder is fixed to the rear side of the lower beam through a bracket, and the piston rod of the push-die cylinder is connected to the mobile workbench.

[0008] According to some embodiments of the present invention, the bottom of the liquid-filled sealing plate is provided with sliding positions on the left and right sides respectively, the top surface of the middle beam is provided with a mold lifting guide rail cooperating with the sliding positions, and the mold lifting guide rail extends to the rear of the middle beam; double-ear ring-connected traction cylinders are respectively installed on the left and right sides of the liquid-filled sealing plate, and the tail end of the double-ear ring-connected traction cylinder is installed on the top surface of the middle beam.

[0009] According to some embodiments of the present invention, the upper beam and the lower beam are respectively fixedly connected to side columns on the left and right sides, and the side columns are provided with longitudinal guide rails; the middle beam is provided with a guide rail adjustment seat, and the guide rail adjustment seat is provided with a slider that cooperates with the longitudinal guide rail.

[0010] According to some embodiments of the present invention, the bottom surface of the upper water cut-off chamber is provided with evenly arranged radial exhaust grooves, and the bottom surface of the upper water cut-off chamber is provided with annular exhaust grooves, and the annular exhaust grooves pass through the radial exhaust grooves; the top of the lower water cut-off chamber is provided with evenly arranged vertical exhaust holes in the longitudinal direction, the vertical exhaust holes are connected to the horizontal holes, and the top opening position of the vertical exhaust holes matches the position of the annular exhaust grooves.

[0011] According to some embodiments of the present invention, a locking cylinder barrel is provided on the upper beam, a hammer locking cylinder piston rod is installed in the locking cylinder barrel, stepped through holes are arranged on the inner wall of the upper water-cutting chamber, a locking pin is inserted in the stepped through hole, and the tail end of the locking pin extends into the inner cavity of the hammer locking cylinder piston rod; the bottom of the locking cylinder barrel is closed by a hammer locking cylinder guide sleeve, and the hammer locking cylinder piston rod pushes the locking pin out of the stepped through hole by pressing down.

[0012] According to some embodiments of the present invention, the impact power head includes an accumulator, an accumulator valve block, an impact cylinder barrel, a large cartridge valve, and a small cartridge valve. The small cartridge valve is communicated with the oil pressure chamber. The accumulator is mounted on the accumulator valve block. An oil pressure chamber is provided in the accumulator valve block. The oil pressure chamber and the accumulator are disconnected or communicated with each other by the large cartridge valve. The impact cylinder barrel is installed at the bottom of the oil pressure chamber. An impact cylinder piston rod is installed in the impact cylinder barrel. The bottom end of the impact cylinder piston rod is connected to the impact hammer head.

[0013] According to some embodiments of the present invention, the accumulator valve block is connected to the upper beam through a support body, and an oil tank is installed on the support body; a pressure relief hole is provided on the inner wall of the lower section of the impact cylinder barrel, and an impact cylinder buffer sleeve is installed on the outer surface of the lower end of the impact cylinder barrel, and an upper oil discharge channel, a lower oil discharge channel and a lower oil inlet are respectively provided on the impact cylinder buffer sleeve, and the lower oil inlet is connected with the small cartridge valve, the upper oil discharge channel is connected with the pressure relief hole, the upper oil discharge channel is controlled by an upper filling valve, and the lower oil discharge channel is controlled by a lower filling valve, and a vent is provided on the lower oil discharge channel, the upper filling valve and the lower filling valve are respectively connected with the oil tank through oil pipes, and the lower oil inlet is used to inject oil into the impact cylinder buffer sleeve.

[0014] According to some embodiments of the present invention, an impact cylinder anti-impact sleeve is installed in the oil pressure chamber, and a limit pin is installed in the center of the impact cylinder anti-impact sleeve. After the impact cylinder piston rod returns, the bottom of the limit pin is tightly pressed against the top of the impact cylinder piston rod.

[0015] The present invention also provides a method for using a large-scale liquid-filled impact composite forming device, comprising the following steps:

[0016] The die-pushing cylinder pushes the movable worktable out of the device, and the worktable is pushed out with the movable worktable. The mold is installed on the worktable, the workpiece blank is placed in the appropriate position of the mold and covered with the mold blank cover plate, and the die-pushing cylinder resets the worktable and the movable worktable; the lower lifting cylinder lifts the worktable, and the mold, the workpiece blank and the blank cover plate are attached to the bottom surface of the middle beam, so that the lower port of the lower water cut-off chamber is closed; the double-ear ring connection type traction cylinder pushes the liquid filling sealing plate back to the central position of the middle beam, and the liquid filling sealing plate closes the upper port of the lower water cut-off chamber; the closed lower water cut-off chamber is filled with low-pressure aqueous solution, and the lifting cylinder and the lower lifting cylinder are used. The oil cylinder moves upward to make the liquid-filled sealing plate close to the bottom surface of the upper water-cutting chamber, and the oil pressure of the lower ejection cylinder is adjusted to form a preset edge holding force; the closed lower water-cutting chamber is filled with liquid of the pressure required for workpiece forming, so that most features of the workpiece blank are liquid-filled and stretched to complete the liquid-filling forming process; the lower ejection cylinder and the lifting cylinder move downward at the same time to make the liquid-filled sealing plate leave the bottom surface of the upper water-cutting chamber, the liquid-filled sealing plate is lifted up, and the two double-ear ring-connected traction cylinders push the liquid-filled sealing plate out to open the upper port of the lower water-cutting chamber; the lifting cylinder retracts, and the lower ejection cylinder rises to tightly connect the upper end opening of the lower water-cutting chamber with the lower end opening of the upper water-cutting chamber. The two parts are connected to form a complete water chamber, so that the workbench, the mold, the workpiece blank that has been filled with liquid and stretched, the blank cover plate, the middle beam, and the upper water cut-off chamber form a whole; water is filled into the complete water chamber to make the water level reach the preset position; the vent hole fills the compressed air into the lower oil discharge channel of the impact cylinder buffer sleeve, and all the hydraulic oil is blown into the oil tank; the piston rod of the hammer head locking cylinder moves downward to push out the locking pin and lock the impact hammer; at the same time, the large cartridge valve on the accumulator valve block opens, and the small cartridge valve closes, and the high-pressure oil in the accumulator is filled into the oil pressure cavity; the piston rod of the hammer head locking cylinder moves upward, the impact hammer is unlocked, and the impact hammer is released. The piston rod of the impact cylinder drives the impact hammer downward under the push of the high-pressure hydraulic oil of the accumulator, realizing high-energy and high-speed impact forming; the large cartridge valve on the accumulator valve block is closed, and the accumulator is filled with fluid; the small cartridge valve on the accumulator valve block is opened, and the oil inlet on the buffer sleeve is filled with oil, and the piston rod of the impact cylinder drives the hammer back to the highest position, and the piston rod of the hammer locking cylinder moves downward to push out the locking pin and lock the impact hammer; the lower push cylinder moves downward to reset the workbench; the push die cylinder pushes out the mobile workbench together with the workbench, removes the blank pressing plate and the finished workpiece blank; and the working steps (1) to (12) are cycled. Additional aspects and advantages of the present invention will be partially given in the following description, and partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention at the liquid filling and forming stage;

[0019] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the present invention at the liquid filling and forming stage;

[0020] Figure 3 is a three-dimensional schematic diagram of an embodiment of the present invention at the impact forming stage;

[0021] Figure 4 is a cross-sectional schematic diagram of an embodiment of the present invention at the impact forming stage;

[0022] Figure 5 is a schematic diagram of the combined state of the lower beam and the workbench in an embodiment of the present invention;

[0023] Figure 6 is a cross-sectional schematic diagram of the assembly state of the lower beam and the workbench in an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the combination state of the middle beam and the liquid-filled sealing plate in an embodiment of the present invention Figure 1 ;

[0025] Figure 8 Schematic diagram of the combination state of the middle beam and the liquid-filled sealing plate in an embodiment of the present invention Figure 2 ;

[0026] Fig. 9 Schematic diagram of the cross section of the combination state of the middle beam and the liquid-filled sealing plate in the embodiment of the present invention Figure 1 ;

[0027] Fig.10 Schematic diagram of the cross section of the combination state of the middle beam and the liquid-filled sealing plate in the embodiment of the present invention Figure 2 ;

[0028] Fig.11 It is a schematic diagram of the combined state of the power head and the upper beam in an embodiment of the present invention;

[0029] Fig.12 A cross-sectional schematic diagram of the combined state of the power head and the upper beam in an embodiment of the present invention Figure 1 ;

[0030] Fig.13 A cross-sectional schematic diagram of the combined state of the power head and the upper beam in an embodiment of the present invention Figure 2 ;

[0031] Fig.14 A cross-sectional schematic diagram of the combined state of the power head and the upper beam in an embodiment of the present invention Figure 3 ;

[0032] Fig.15 A cross-sectional schematic diagram of the combined state of the power head and the upper beam in an embodiment of the present invention Figure 4 ;

[0033] Fig.16 Schematic cross-sectional view of the upper beam, middle beam, upper water cut-off chamber, and lower water cut-off chamber in the embodiment of the present invention at the impact forming stage Figure 1 ;

[0034] Fig.17 Schematic cross-sectional view of the upper beam, middle beam, upper water cut-off chamber, and lower water cut-off chamber in the embodiment of the present invention at the impact forming stage Figure 2 ;

[0035] Fig.18 Schematic diagram of the upper water cut-off chamber in an embodiment of the present invention;

[0036] Fig.19 Schematic cross-sectional view of the lower water cut-off chamber in an embodiment of the present invention;

[0037] Fig. 20 Schematic diagram of the combination state between the upper water cut-off chamber and the lower water cut-off chamber in an embodiment of the present invention;

[0038] Fig.21 Schematic diagram of a small cartridge valve in an embodiment of the present invention.

[0039] Lower beam 100, lower top cylinder 110, slide rail 120, push die cylinder 130; workbench 200, table 210, support base 220, mobile workbench 230, guide plate 231; middle beam 300, mold lifting guide rail 310, double earring connection type traction cylinder 320, guide rail adjustment seat 330, slide block 340, water inlet channel 350, water inlet check valve 351, water outlet channel 360, drain valve 361; lower water cut-off chamber 400, horizontal hole 410, exhaust vertical hole 420, annular groove 430; upper beam 600, lifting cylinder 610, locking cylinder barrel 620, hammer locking cylinder guide sleeve 630, hammer locking cylinder piston rod 640; upper water cut-off chamber 700, diameter To the exhaust groove 710, the annular exhaust groove 720, the stepped through hole 730, the locking pin 740; the impact hammer head 800; the impact power head 900, the accumulator 910, the accumulator valve block 920, the oil pressure chamber 921, the impact cylinder cylinder barrel 930, the pressure relief hole 931, the impact cylinder piston rod 940, the impact cylinder buffer sleeve 950, the upper oil discharge channel 951, the lower oil discharge channel 952, the vent 953, the lower oil inlet 954, the upper filling valve 960, the lower filling valve 970, the impact cylinder anti-impact sleeve 980, the limit pin 981, the large cartridge valve 990, the small cartridge valve 9100; the side column 1000, the longitudinal guide rail 1100; the support body 2000, the oil tank 2100. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] Reference Figures 1 to 4 As shown, a large-scale liquid-filled impact composite forming device is provided with a lower beam 100, a middle beam 300, and an upper beam 600 from bottom to bottom; a lower jacking cylinder 110 is provided in the lower beam 100, and the piston rod of the lower jacking cylinder 110 lifts the workbench 200 when it moves upward, and a mold is installed on the workbench 200, and the workpiece blank is placed in a suitable position of the mold and covered with a mold blank cover plate; a lower water cut-off chamber 400 is provided in the middle beam 300, and the lower and upper ends of the lower water cut-off chamber 400 are opened respectively, and the inner wall of the lower water cut-off chamber 400 is surrounded by horizontal holes 410, and the horizontal holes 410 are filled with water or discharged through the water channel on the middle beam 300. A liquid-filled sealing plate 500 is provided on the top surface of 300, and the upper port of the lower water-cutting chamber 400 is opened or closed by moving the liquid-filled sealing plate 500. The corners of the middle beam 300 are connected to the piston rod of the lifting cylinder 610, and the lifting cylinder 610 is fixed on the top of the upper beam 600; an upper water-cutting chamber 700 is installed in the upper beam 600, and the upper and lower ends of the upper water-cutting chamber 700 are opened respectively, and the lower port of the upper water-cutting chamber 700 corresponds to the position of the upper port of the lower water-cutting chamber 400; an impact hammer head 800 is inserted into the upper water-cutting chamber 700, and the impact hammer head 800 impacts downward in the upper water-cutting chamber 700 under the thrust provided by the impact power head 900.

[0043] During operation, the liquid-filled sealing plate 500 moves to the center of the middle beam 300 to close the upper port of the lower water-cutting chamber 400. The middle beam 300 moves upward through the lifting cylinder 610 to press the liquid-filled sealing plate 500 against the bottom surface of the upper water-cutting chamber 700. The piston rod of the lower top cylinder 110 lifts the workbench 200 equipped with the mold and the workpiece blank against the bottom surface of the lower water-cutting chamber 400, so that the lower port of the lower water-cutting chamber 400 is closed, and the lower water-cutting chamber 400 is filled with liquid of the pressure required for forming, so that the workpiece blank is filled with liquid to stretch and form most of the features, and the liquid-filled forming is completed; the liquid-filled sealing plate 500 opens the upper port of the lower water-cutting chamber 400 by moving, and the lifting cylinder 610 and the lower top cylinder 110 allow the workbench 200 and the middle beam 300 to move upward at the same time, so that the lower water-cutting chamber 400 is The upper end of the upper water cut-off chamber 700 is pressed against the lower end of the upper water cut-off chamber 700, so that the upper water cut-off chamber 700 and the lower water cut-off chamber 400 form a complete water chamber, and the complete water chamber is filled with water to a specified water level. The impact power head 900 pushes the impact hammer head 800 downward, so that the impact hammer head 800 impacts the liquid in the complete water chamber, and high-energy and high-speed impact forming can be performed on the workpiece blank, so that the workpiece blank can be formed with local small features; the device can successively implement the liquid filling forming process and the high-energy and high-complete forming process to solve the problem that the liquid filling forming technology is difficult to form local feature sizes such as small concave angles and small indentations at one time, avoid increasing the tonnage of the equipment, reduce production costs, improve the position accuracy of local feature sizes, improve the overall performance of parts, and provide a liquid filling forming area of ​​1000000mm 2 The above is a large-scale liquid-filled impact composite forming device with a liquid-filled forming force of up to 5000T and an impact forming energy of up to 750000J.

[0044] Reference Figure 5 , 6 As shown, the workbench 200 includes a table plate 210 and a supporting base 220. The supporting base 220 is lifted and lowered by the piston rod of the lower top cylinder 110, and the mold is placed on the table plate 210. The supporting base 220 is covered with a movable workbench 230. When the supporting base 220 moves downward with the piston rod of the lower top cylinder 110, the table plate 210 is placed on the movable workbench 230 and supported by the movable workbench 230.

[0045] Guide plates 231 are fixed at the bottom of the left and right sides of the movable workbench 230, and a slide rail 120 cooperating with the guide plate 231 is provided on the top of the lower beam 100. The slide rail 120 extends to the front of the lower beam 100, and a die-pushing cylinder 130 is fixed to the rear side of the lower beam 100 through a bracket, and the piston rod of the die-pushing cylinder 130 is connected to the movable workbench 230; the workbench 200 is moved out of the device or into the device on the slide rail 120 along with the movable workbench 230 by the die-pushing cylinder 130, and the mold, workpiece blank, and blank cover are placed outside the device and then moved into the device. After the processing is completed, it is moved out of the device to facilitate the removal of the processed workpiece.

[0046] Reference Figures 7 to 10 As shown, sliding positions 510 are respectively provided on the left and right sides of the bottom of the liquid filling sealing plate 500, and a mold lifting guide rail 310 cooperating with the sliding position 510 is provided on the top surface of the middle beam 300, and the mold lifting guide rail 310 extends to the rear of the middle beam 300; during the liquid filling forming process, the liquid filling sealing plate 500 is pulled back to the top surface of the middle beam 300 along the mold lifting guide rail 310 by the double earring connection type traction cylinder 320 installed on the left and right sides of the liquid filling sealing plate 500, and the upper port of the lower water cut-off chamber 400 is closed; during the impact forming process, the liquid filling sealing plate 500 can be pushed away from the top surface of the middle beam 300 by the double earring connection type traction cylinder 320, so that the upper port of the lower water cut-off chamber 400 is opened.

[0047] During the liquid filling forming process, in order to ensure the sealing of the lower water cut-off chamber 400, the liquid filling sealing plate 500 is tightly attached to the top surface of the middle beam 300. In order to enable the liquid filling sealing plate 500 to be smoothly pushed out after the liquid filling forming process is completed, the ends of the piston rod of the double-ear ring connected traction cylinder 320 are rotatably mounted on the left and right sides of the liquid filling sealing plate 500, and the tail end of the double-ear ring connected traction cylinder 320 is rotatably mounted on the top surface of the middle beam 300. Before the liquid filling sealing plate 500 is pushed out, the lower top cylinder 110 and the lifting cylinder 610 move downward at the same time, allowing the liquid filling sealing plate 500 to leave the lower end surface of the upper water cut-off chamber 700, so that the liquid filling sealing plate 500 is lifted, and the two double-ear ring connected traction cylinders 320 push the liquid filling sealing plate 500 out.

[0048] An annular groove 430 is provided outside the lower water cut-off chamber 400, and the rear end of the transverse hole 410 opens on the annular groove 430. A water inlet channel 350 and a water outlet channel 360 are respectively provided in the middle beam 300. The water inlet channel 350 and the water outlet channel 360 are both connected to the annular groove 430. A drain valve 361 for controlling the water outlet channel 360 is installed on the middle beam 300, and a water inlet check valve 351 for controlling the water inlet channel 350 is installed on the middle beam 300.

[0049] Reference Figure 1 , 3 As shown, side columns 1000 are fixedly connected to the left and right sides of the upper beam 600 and the lower beam 100 respectively, and the upper beam 600 and the lower beam 100 are formed into a frame through the side columns 1000, and two longitudinal guide rails 1100 are respectively installed on the two side columns 1000, and four guide rail adjustment seats 330 are installed on the middle beam 300, and sliders 340 cooperating with the longitudinal guide rails 1100 are installed on the guide rail adjustment seats 330. The middle beam 300 moves up and down on the longitudinal guide rails 1100 to ensure that the upper water cut-off chamber 700 and the lower water cut-off chamber 400 are in a coaxial state when opening and closing to avoid misalignment.

[0050] Reference Figures 17 to 19As shown, during the impact forming process, the impact hammer head 800 moves downward at a high speed in the complete water chamber composed of the upper water cut-off chamber 700 and the lower water cut-off chamber 400. If the air in the complete water chamber cannot be discharged quickly, resistance against the impact hammer head 800 will be generated, making it impossible for the impact hammer to produce a high-speed impact action; therefore, radial exhaust grooves 710 are evenly arranged on the bottom surface of the upper water cut-off chamber 700, and an annular exhaust groove 720 is opened on the bottom surface of the upper water cut-off chamber 700. The annular exhaust groove 720 passes through the radial exhaust groove 710, so that the radial exhaust grooves 710 are connected; exhaust vertical holes 420 are evenly arranged along the longitudinal direction on the top of the lower water cut-off chamber 400, and the exhaust vertical holes 420 are connected to the horizontal holes 410, and the top opening position of the exhaust vertical holes 420 matches the position of the annular exhaust groove 720. When the impact hammer head 800 is still moving in the upper water cut-off chamber 700, the squeezed air is discharged from the radial exhaust groove 710 on the lower end surface of the upper water cut-off chamber 700. When the impact hammer head 800 moves into the lower water cut-off chamber 400, the squeezed air enters the exhaust vertical hole 420 through the horizontal hole 410, then enters the annular exhaust groove 720 and is discharged through the radial exhaust groove 710.

[0051] Reference Fig.15 , 16 As shown, when the hydraulic oil in the impact power head 900 enters the oil pressure chamber 921, if the impact hammer head 800 is not strongly locked, it will immediately impact downward under the action of the hydraulic oil. At this time, the pressure of the hydraulic oil in the oil pressure chamber 921 has not reached the set pressure value, and the impact speed and impact energy of the impact hammer head 800 also cannot reach the set values. Therefore, it is necessary to ensure that the impact hammer head 800 is strongly locked before reaching the set pressure value.

[0052] A locking cylinder barrel 620 is provided on the upper beam 600, and the inner hole groove 620 of the locking cylinder barrel is located outside the upper water cut-off chamber 700, and a hammer head locking cylinder piston rod 640 is installed inside. Stepped through holes 730 are arranged on the inner wall of the upper water cut-off chamber 700, and locking pins 740 are inserted in the stepped through holes 730. There are at least 30 locking pins 740, and the tail ends of the locking pins 740 extend into the inner cavity of the locking cylinder piston rod 640; the bottom of the locking cylinder barrel 620 is closed by a hammer head locking cylinder guide sleeve 630.

[0053] When performing impact forming processing, the upper cavity of the locking cylinder barrel 620 is drained of oil, and the lower cavity of the locking cylinder barrel 620 is filled with oil, so that the hammer head locking cylinder piston rod 640 moves upward, and after the locking pin 740 is unblocked, the locking pin 740 retracts into the stepped through hole 730, and the impact hammer head 800 impacts downward at high speed; after completing the high-energy and high-speed impact forming processing, the lower cavity of the locking cylinder barrel 620 is drained of oil, and the upper cavity of the locking cylinder barrel 620 is filled with oil, so that the hammer head locking cylinder piston rod 640 moves downward, and the locking pin 740 is pushed outward by the hammer head locking cylinder piston rod 640 to achieve the locking of the impact hammer head 800.

[0054] Reference Figures 11 to 15 As shown in Figures 21, the impact power head 900 includes an accumulator 910, an accumulator valve block 920, a large cartridge valve 990, a small cartridge valve 9100, and an impact cylinder barrel 930. The accumulator 910 is mounted on the accumulator valve block 920. An oil pressure chamber 921 is provided in the accumulator valve block 920. The oil pressure chamber 921 and the accumulator 910 are disconnected or connected by the large cartridge valve 990. The impact cylinder barrel 930 is installed at the bottom. An impact cylinder piston rod 940 is installed in the impact cylinder barrel 930. The bottom end of the impact cylinder piston rod 940 is connected to the impact hammer head 800. The accumulator 910 provides high-pressure hydraulic oil to the oil pressure chamber 921. When the oil pressure in the oil pressure chamber 921 reaches the preset oil pressure, the hydraulic oil pushes the impact cylinder piston rod 940, so that the impact cylinder piston rod 940 drives the impact hammer head 800 to move downward for impact forming.

[0055] The accumulator valve block 920 is connected to the upper beam 600 through a support body 2000, and an oil tank 2100 is installed on the support body 2000; a pressure relief hole 931 is provided on the inner wall of the lower section of the impact cylinder barrel 930, and an impact cylinder buffer sleeve 950 is provided on the outer surface of the lower end of the impact cylinder barrel 930. The impact cylinder buffer sleeve 950 is respectively provided with an upper oil discharge channel 951, a lower oil discharge channel 952, and a lower oil inlet 954. The upper oil discharge channel 951 is communicated with the pressure relief hole 931, the upper oil discharge channel 951 is controlled by an upper filling valve 960, and the lower oil discharge channel 952 is controlled by a lower filling valve 970. The upper filling valve 960 and the lower filling valve 970 are respectively communicated with the oil tank 2100 through oil pipes.

[0056] The lower oil inlet 954 is connected to the small cartridge valve 9100. When the impact cylinder piston rod 940 moves to the end of the impact stroke, the oil in the inner cavity of the oil pressure chamber 921 and the inner cavity of the impact cylinder barrel 930 flows through the lower cartridge valve 9100 and the lower oil inlet 954 to the bottom of the top end of the impact cylinder piston rod 940, so that the impact cylinder piston rod 940 is subjected to oil pressure and starts to return.

[0057] When the upper end surface of the piston rod of the impact cylinder rushes down and enters the upper edge of the pressure relief hole 931, the high-pressure oil of the piston rod is pushed into the upper oil discharge channel 951 from the oil discharge hole, so that the oil pressure of the hydraulic oil is immediately reduced, and the upper filling valve 960 opens the upper oil discharge channel 951 to allow the hydraulic oil to return to the oil tank 2100; at this time, the lower end surface of the impact hammer head 800 contacts the impacted liquid surface, and the impact piston rod and the hammer head impact downward by inertia to avoid bending of the impact piston rod.

[0058] Since the resistance of hydraulic oil is greater than that of air, in order to reduce the resistance of the lower chamber of the impact cylinder barrel 930 and the lower end surface of the impact hammer head 800, the oil in the lower chamber of the impact cylinder must be blown away before the impact forming process is implemented. A vent hole 953 is provided on the lower oil discharge channel 952, and compressed air is connected to the vent hole 953. The lower filling valve 970 is opened to blow the oil in the lower oil discharge channel 952 into the oil tank 2100 to reduce the resistance and increase the impact speed.

[0059] After the impact cylinder piston rod 940 and the impact hammer head 800 complete the downward impact action, they must move upward to complete the return action. If there is no restriction on the position of the impact cylinder piston, the piston rod will overshoot, resulting in the device failing due to the impact hammer head 800 falling off or smashing the impact cylinder guide sleeve. Therefore, an impact cylinder anti-impact sleeve 980 is installed in the oil pressure chamber 921, and a limit pin 981 is installed in the center of the impact cylinder anti-impact sleeve 980, so that the impact cylinder piston rod 940 will remain motionless after hitting the limit pin 981 during the return stroke, thereby ensuring the accurate positioning of the piston rod after the return stroke.

[0060] Reference Figures 1 to 4 As shown, in addition, this embodiment also relates to a method for using a large-scale liquid-filled impact composite forming device, comprising the following steps:

[0061] The push-die oil cylinder 130 pushes the movable workbench 230 out of the device, and the workbench 200 is pushed out along with the movable workbench 230, and the mold is installed on the workbench 200, the workpiece blank is placed in the appropriate position of the mold and covered with the mold blank cover plate, and the push-die oil cylinder 130 resets the workbench 200 and the movable workbench 230; the lower lifting oil cylinder 110 lifts the workbench 200, and the mold, the workpiece blank and the blank cover plate are attached to the bottom surface of the middle beam 300, so that the lower port of the lower water cut-off chamber 400 is closed; the double earring connection type traction oil cylinder 320 pushes the liquid filling sealing plate 500 back to the central position of the middle beam 300, and the liquid filling sealing plate 500 closes the upper port of the lower water cut-off chamber 400; the closed lower water cut-off chamber 400 is filled with low-pressure aqueous solution to lift it The oil cylinder 610 and the lower ejector cylinder 110 move upward, so that the liquid-filled sealing plate 500 is in close contact with the bottom surface of the upper water-cutting chamber 700, and the oil pressure of the lower ejector cylinder is adjusted to form a preset clamping force; the closed lower water-cutting chamber 400 is filled with liquid of the pressure required for workpiece forming, so that most features of the workpiece blank are formed by liquid filling and stretching, and the liquid filling forming process is completed; the lower ejector cylinder 110 and the lifting cylinder 610 move downward at the same time, so that the liquid-filled sealing plate 500 leaves the bottom surface of the upper water-cutting chamber 700, the liquid-filled sealing plate 500 is lifted, and the two double-ear ring-connected traction cylinders 320 push the liquid-filled sealing plate 500 out, so that the upper port of the lower water-cutting chamber 400 is opened; the lifting cylinder 610 retracts, and the lower ejector cylinder rises, so that the upper end opening of the lower water-cutting chamber 400 is aligned with the lower end opening of the upper water-cutting chamber 700. The end openings are tightly attached to form a complete water chamber, so that the workbench 200, the mold, the workpiece blank that has been filled with liquid and stretched, the blank cover plate, the middle beam 300, and the upper water cut-off chamber 700 form a whole; water is filled into the complete water chamber to make the water level reach the preset position; the vent hole 953 fills the compressed air into the lower oil discharge channel 952 of the impact cylinder buffer sleeve 950, and blows all the hydraulic oil into the oil tank 2100; the piston rod 640 of the hammer head locking cylinder moves downward to push out the locking pin 740, and locks the impact hammer head 800; at the same time, the large cartridge valve 990 on the accumulator valve block 920) is opened, and the small cartridge valve 9100 is closed, and the high-pressure oil in the accumulator 910 is filled into the oil pressure chamber 921; the piston rod 640 of the hammer head locking cylinder moves upward, and the impact hammer head 8 00 is unlocked, and the impact cylinder piston rod 940 drives the impact hammer 800 to impact downward under the push of the high-pressure hydraulic oil in the accumulator 910, thereby realizing high-energy and high-speed impact forming; the large cartridge valve 990 on the accumulator valve block 920 is closed, and the accumulator 910 is filled with fluid; the small cartridge valve 9100 is opened, and the lower oil inlet 954 is supplied with oil, and the impact cylinder piston rod 940 drives the hammer to return to the highest position, and the hammer locking cylinder piston rod 640 moves downward to push out the locking pin 740, thereby locking the impact hammer 800; the lower push cylinder 110 moves downward to reset the workbench 200; the push die cylinder 130 pushes out the movable workbench 230 together with the workbench 200, removes the blank pressing plate and the processed workpiece blank; and the working steps (1) to (12) are cyclically operated.The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A method for using a large-scale liquid-filled impact composite forming device, characterized in that: The following steps are involved: (1) The die-pushing cylinder (130) pushes the movable worktable (230) out of the device, and the worktable (200) is pushed out along with the movable worktable (230), and the die is mounted on the worktable (200), and the workpiece blank is placed at a suitable position of the die and covered with a die blank cover plate, and the die-pushing cylinder (130) resets the worktable (200) and the movable worktable (230); the lower lifting cylinder (110) lifts the worktable (200), and the die, the workpiece blank and the blank cover plate are attached to the bottom surface of the middle beam (300), so that the lower port of the lower water cut-off chamber (400) is closed; (2) The double-ear ring connection type traction cylinder (320) pushes the liquid filling sealing plate (500) back to the central position of the middle beam (300), and the liquid filling sealing plate (500) closes the upper port of the lower water cut-off chamber (400); (3) The closed lower water cut-off chamber (400) is filled with a low-pressure aqueous solution, the lifting cylinder (610) and the lower ejecting cylinder (110) are moved upward, so that the liquid-filled sealing plate (500) is in close contact with the bottom surface of the upper water cut-off chamber (700), and the oil pressure of the lower ejecting cylinder is adjusted to form a preset edge holding force; (4) filling the closed lower water cut-off chamber (400) with liquid of the pressure required for workpiece forming, so that most features of the workpiece blank are formed by liquid filling and stretching, thereby completing the liquid filling forming process; (5) The lower push cylinder (110) and the lifting cylinder (610) move downward simultaneously, allowing the liquid-filled sealing plate (500) to leave the bottom surface of the upper water-blocking chamber (700), and the liquid-filled sealing plate (500) is lifted up. The two double-ear ring-connected traction cylinders (320) push the liquid-filled sealing plate (500) out, so that the upper port of the lower water-blocking chamber (400) is opened; (6) The lifting cylinder (610) is retracted, and the lower lifting cylinder is lifted, so that the upper end opening of the lower water cut-off chamber (400) and the lower end opening of the upper water cut-off chamber (700) are closely attached to form a complete water chamber, so that the workbench (200), the mold, the workpiece blank that has been filled with liquid and stretched, the blank cover plate, the middle beam (300), and the upper water cut-off chamber (700) form a whole; (7) Fill the complete water chamber with water until the water level reaches the preset position; (8) The vent hole (953) charges compressed air into the lower oil discharge channel (952) of the impact cylinder buffer sleeve (950), and blows all the hydraulic oil into the oil tank (2100); (9) The piston rod (640) of the hammer head locking cylinder moves downward to push out the locking pin (740) and lock the impact hammer head (800); at the same time, the large cartridge valve (990) on the accumulator valve block (920) is opened, the small cartridge valve (9100) is closed, and the high-pressure oil in the accumulator (910) is filled into the oil pressure chamber (921); (10) The piston rod (640) of the hammer head locking cylinder moves upward, the impact hammer head (800) is unlocked, and the piston rod (940) of the impact cylinder drives the impact hammer head (800) to impact downward under the push of the high-pressure hydraulic oil in the accumulator (910), thereby achieving high-energy and high-speed impact forming; (11) The large cartridge valve (990) on the accumulator valve block (920) is closed, and the accumulator (910) is filled with liquid; the small cartridge valve (9100) is opened, and oil is supplied from the lower oil inlet (954), and the piston rod (940) of the impact cylinder drives the hammer head to return to the highest position, and the piston rod (640) of the hammer head locking cylinder moves downward to push out the locking pin (740), thereby locking the impact hammer head (800); (12) The lower push cylinder (110) moves downward to reset the workbench (200); the die push cylinder (130) pushes out the movable workbench (230) together with the workbench (200), and removes the blank pressing plate and the processed workpiece blank; (13) Repeat steps (1) to (12).

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