CN111842606A - Large-scale liquid-filled impact composite forming device and working method thereof - Google Patents

Abstract

The invention discloses a large-scale liquid-filled impact composite forming device and a using method thereof, wherein the device comprises a lower beam, a workbench, a middle beam, a lower water intercepting chamber, an upper beam, a liquid-filled sealing plate, an upper water intercepting chamber, an impact hammer head and an impact power head; the upper port of the lower water intercepting chamber is sealed by the liquid filling seal plate, the middle beam moves upwards through the lifting oil cylinder, the liquid filling seal plate is tightly abutted against the bottom surface of the upper water intercepting chamber, the lower jacking oil cylinder jacks the workbench to seal the lower port of the lower water intercepting chamber, high-pressure liquid is filled in the lower water intercepting chamber, and the workpiece blank is subjected to liquid filling and stretching forming to obtain most characteristics; the upper port of the lower water intercepting chamber is opened by the liquid filling closing plate, the workbench and the middle beam are enabled to simultaneously move upwards by the lifting oil cylinder and the lower jacking oil cylinder, the upper water intercepting chamber and the lower water intercepting chamber form a complete water chamber, water is filled in the complete water chamber to a specified water level, the impact power head pushes the impact hammer downwards, and high-energy high-speed impact forming is implemented, so that the problem that local characteristic sizes are difficult to form at one time is solved, the production cost is reduced, the position accuracy of the local characteristic sizes is improved, and the integral performance of parts is improved.

Description

Large-scale liquid-filled impact composite forming device and working method thereof

Technical Field

The invention relates to the technical field of metal pressure processing, in particular to a large-scale liquid-filled impact composite forming device and a working method thereof.

Background

In the fields of aerospace, automobiles and the like, the requirements on structural lightweight, functionality and integrity are higher and higher, so that functional parts with complex structures are widely applied, for example, an automobile inner plate is a complex curved surface with edges and corners, and in a liquid filling forming process, due to the limitation of liquid filling forming medium pressure, although most characteristics such as bosses, convex ribs and the like are formed by attaching a die, sharp corners and bent parts cannot be formed fully; for complex parts with most characteristics formed by liquid filling, in order to form local characteristics, the tonnage of equipment is inevitably increased only by simply increasing the liquid filling forming pressure, the production cost is increased, if other processes are assisted after forming, the working procedures are increased, secondary assembly errors are generated, the position precision of the local characteristic dimension cannot be ensured by the method, the integral performance of the parts is influenced, and the whole large-scale part is scrapped seriously, so that the resource waste is caused; there is therefore a need for improvement of the above-mentioned technical problem.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a large-scale liquid-filled impact composite forming device which can carry out large-scale composite forming of a liquid-filled forming process and a high-energy high-speed forming process in sequence.

The large liquid-filled impact composite forming device comprises a lower beam, a workbench, a middle beam, a lower water intercepting chamber, a liquid-filled sealing plate, an upper beam, an upper water intercepting chamber, an impact hammer head and an impact power head; a lower jacking oil cylinder is arranged in the lower beam; the workbench is positioned above the lower beam and is jacked up and lowered down by a piston rod of the lower jacking oil cylinder; the middle beam is positioned above the workbench; the lower water intercepting chamber is arranged in the middle beam, the upper end and the lower end of the lower water intercepting chamber are respectively provided with an opening, transverse holes are arranged on the inner wall of the lower water intercepting chamber in a surrounding manner, the liquid filling sealing plate is arranged on the top surface of the middle beam, and the transverse holes are used for water inlet through a water inlet channel on the middle beam or water outlet through a water outlet channel; the liquid filling seal plate is used for opening or sealing an upper port of the lower water intercepting chamber; a lifting oil cylinder is arranged at the top of the upper beam, and a piston rod of the lifting oil cylinder penetrates through the upper beam and is fixedly connected with the middle beam; the upper water intercepting chamber is arranged in the upper beam, the upper end and the lower end of the upper water intercepting chamber are respectively provided with an opening, and the lower port of the upper water intercepting chamber corresponds to the upper port of the lower water intercepting chamber in position; the impact hammer head extends into the upper water intercepting chamber and impacts downwards in the upper water intercepting chamber; and the impact power head provides thrust for the impact hammer head.

The large liquid-filled impact composite forming device provided by the embodiment of the invention at least has the following beneficial effects:

the liquid filling seal plate moves to the center of the middle beam, the upper port of the lower water intercepting chamber is sealed, the middle beam moves upwards through the lifting oil cylinder, the liquid filling seal plate is tightly pressed against the bottom surface of the upper water intercepting chamber, the piston rod of the lower jacking oil cylinder jacks a workbench provided with a die and a workpiece blank to be tightly pressed against the bottom surface of the lower water intercepting chamber, the lower port of the lower water intercepting chamber is sealed, liquid with required pressure is filled in the lower water intercepting chamber, the workpiece blank is made to be liquid filled and stretched to form most characteristics, and liquid filling forming is completed; the upper port of the lower water intercepting chamber is opened by moving the liquid filling sealing plate, the workbench and the middle beam simultaneously move upwards by the lifting oil cylinder and the lower jacking oil cylinder, the upper port of the lower water intercepting chamber is abutted against the lower port of the upper water intercepting chamber, the upper water intercepting chamber and the lower water intercepting chamber form a complete water chamber, water is filled in the complete water chamber to a specified water level, the impact power head pushes the impact hammer head downwards to enable the impact hammer head to impact liquid in the complete water chamber, high-energy high-speed impact forming can be carried out on a workpiece blank, and the workpiece blank is formed into local small characteristics; the device can successively implement a liquid-filling forming process and a high-energy high-speed forming process, so as to solve the problem that the liquid-filling forming technology is difficult to form local characteristic dimensions such as small concave angles, small indentations and the like at one time, avoid increasing the tonnage of equipment, reduce the production cost, improve the position precision of the local characteristic dimensions, improve the integral performance of parts, and provide a liquid-filling forming area up to 1000000mm²Above and in liquidThe forming force can reach 5000T, and the energy of impact forming reaches 750000J.

According to some embodiments of the invention, the workbench comprises a bedplate and a supporting base, the supporting base is sleeved with a movable workbench, the movable workbench supports the bedplate, guide plates are fixed at the bottoms of the left side and the right side of the movable workbench, a slide rail matched with the guide plates is arranged at the top of the lower beam, and the slide rail extends to the front of the lower beam; and a mold pushing oil cylinder is fixed on the rear side of the lower beam through a bracket, and a piston rod of the mold pushing oil cylinder is connected with the movable workbench.

According to some embodiments of the present invention, the liquid-filled sealing plate has sliding positions at the bottom thereof on the left and right sides, and the top surface of the center sill is provided with a mold lifting guide rail engaged with the sliding positions, the mold lifting guide rail extending rearward of the center sill; and the left side and the right side of the liquid filling seal plate are respectively provided with a double-lug-ring connection type traction oil cylinder, and the tail end of the double-lug-ring connection type traction oil cylinder is arranged on the top surface of the middle beam.

According to some embodiments of the present invention, the upper beam and the lower beam are fixedly connected with side columns at left and right sides thereof, respectively, and the side columns are provided with longitudinal guide rails; and the middle beam is provided with a guide rail adjusting seat, and the guide rail adjusting seat is provided with a sliding block matched with the longitudinal guide rail.

According to some embodiments of the present invention, the bottom surface of the upper water intercepting chamber is provided with radial exhaust grooves which are uniformly arranged, the bottom surface of the upper water intercepting chamber is provided with an annular exhaust groove, and the annular exhaust groove penetrates through the radial exhaust grooves; and the top of the lower water intercepting chamber is uniformly provided with vertical exhaust holes along the longitudinal direction, the vertical exhaust holes are communicated with the transverse holes, and the opening position of the top of each vertical exhaust hole is matched with the position of the annular exhaust groove.

According to some embodiments of the invention, a locking cylinder barrel is arranged on the upper beam, a hammerhead locking cylinder piston rod is arranged in the locking cylinder barrel, stepped through holes are arranged on the inner wall of the upper water intercepting chamber, locking pins are inserted in the stepped through holes, and the tail end of each locking pin extends into the inner cavity of the hammerhead locking cylinder piston rod; the bottom of the cylinder barrel of the locking cylinder is sealed through a hammer head locking cylinder guide sleeve, and a piston rod of the hammer head locking cylinder pushes the locking pin out of the stepped through hole through pressing.

According to some embodiments of the invention, the impact power head comprises an energy accumulator, an energy accumulator valve block, an impact cylinder, a large cartridge valve and a small cartridge valve, the small cartridge valve is communicated with the oil pressure cavity, the energy accumulator is mounted on the energy accumulator valve block, the oil pressure cavity is arranged in the energy accumulator valve block, the oil pressure cavity and the energy accumulator are controlled by the large cartridge valve to be disconnected or communicated, the impact cylinder is mounted at the bottom of the oil pressure cavity, an impact cylinder piston rod is mounted in the impact cylinder, and the bottom end of the impact cylinder piston rod is connected with the impact hammer head.

According to some embodiments of the invention, the accumulator valve block is connected to the upper beam through a support body, and an oil tank is mounted on the support body; the oil injection device is characterized in that a pressure relief hole is formed in the inner wall of the lower section of the impact cylinder barrel, an impact cylinder buffer sleeve is sleeved outside the lower end of the impact cylinder barrel, an upper oil discharge channel, a lower oil discharge channel and a lower oil inlet are respectively arranged on the impact cylinder buffer sleeve, the lower oil inlet is communicated with the small cartridge valve, the upper oil discharge channel is communicated with the pressure relief hole, the upper oil discharge channel is controlled by an upper liquid filling valve, the lower oil discharge channel is controlled by a lower liquid filling valve, an air vent is formed in the lower oil discharge channel, the upper liquid filling valve and the lower liquid filling valve are respectively communicated with the oil tank through oil pipes, and the lower oil inlet is used for injecting oil into the impact cylinder.

According to some embodiments of the invention, an impact cylinder impact-prevention sleeve is arranged in the oil pressure cavity, a limit pin is arranged in the center of the impact cylinder impact-prevention sleeve, and after the piston rod of the impact cylinder returns, the bottom of the limit pin abuts against the top of the piston rod of the impact cylinder.

The invention also provides a use method of the large-scale liquid-filled impact composite forming device, which comprises the following steps:

(1) the mold pushing oil cylinder pushes the movable workbench out of the device, the workbench is pushed out along with the movable workbench, the mold is arranged on the workbench, a workpiece blank is placed at a proper position of the mold and covered with a mold blank cover plate, and the mold pushing oil cylinder resets the workbench and the movable workbench; the lower jacking oil cylinder jacks a workbench, and a die, a workpiece blank and a blank cover plate are jacked and attached to the bottom surface of the middle beam, so that the lower port of the lower water intercepting chamber is closed;

(2) the double-lug-ring-connected traction oil cylinder pushes the liquid-filling sealing plate back to the central position of the middle beam, and the liquid-filling sealing plate seals the upper port of the lower water intercepting chamber;

(3) filling the closed lower water intercepting chamber with low pressure water solution, lifting the oil cylinder and the lower ejection oil cylinder to move upwards to make the liquid filling sealing plate and the bottom surface of the upper water intercepting chamber cling to each other, and adjusting the oil pressure of the lower ejection oil cylinder to form preset blank pressing force;

(4) filling liquid with pressure required by workpiece forming into the closed lower water-intercepting chamber, so that most of characteristics of the workpiece blank are subjected to liquid-filling stretching forming, and the liquid-filling forming process is completed;

(5) the lower top oil cylinder and the lifting oil cylinder simultaneously move downwards, the liquid filling sealing plate is separated from the bottom surface of the upper water intercepting chamber and lifted, and the two double-earring-connected traction oil cylinders push out the liquid filling sealing plate, so that the upper port of the lower water intercepting chamber is opened;

(6) the lifting oil cylinder retracts, the lower jacking cylinder jacks up, and an opening at the upper end of the lower water intercepting chamber and an opening at the lower end of the upper water intercepting chamber are tightly attached to form a complete water chamber, so that the workbench, the die, the workpiece blank which is subjected to liquid filling stretch forming, the blank cover plate, the middle beam and the upper water intercepting chamber form a whole;

(7) filling water into the complete water chamber to enable the water level to reach a preset position;

(8) compressed air is filled into the lower oil discharge channel of the impact cylinder buffer sleeve through the vent hole, and all hydraulic oil is blown into the oil tank;

(9) a piston rod of the hammer head locking cylinder descends to eject the locking pin out to lock the impact hammer head; meanwhile, a large cartridge valve on the energy accumulator valve block is opened, a small cartridge valve is closed, and high-pressure oil in the energy accumulator is filled into the oil pressure cavity;

(10) the hammer head locking cylinder piston rod moves upwards, the impact hammer head is unlocked, and the impact cylinder piston rod drives the impact hammer head to impact downwards under the pushing of high-pressure hydraulic oil of the energy accumulator, so that high-energy high-speed impact forming is realized;

(11) closing a large cartridge valve on the energy accumulator valve block, and filling liquid into the energy accumulator; a small cartridge valve on the energy accumulator valve block is opened, oil enters an oil inlet on the buffer sleeve, a piston rod of the impact oil cylinder drives the hammer to rise to the highest position, a piston rod of the hammer locking cylinder moves downwards to eject a locking pin, and the impact hammer is locked;

(12) the lower jacking oil cylinder moves downwards to reset the workbench; the mold pushing oil cylinder pushes the movable workbench and the workbench out, and the blank pressing plate and the workpiece blank which is processed are taken down;

(13) and (5) working steps (1) to (12) in a circulating mode.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of an embodiment of the present invention during a liquid-filled forming stage;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention during a hydroforming stage;

FIG. 3 is a schematic perspective view of an embodiment of the present invention during an impact forming stage;

FIG. 4 is a schematic cross-sectional view of an embodiment of the present invention during an impact forming stage;

FIG. 5 is a schematic view of a lower beam and a workbench in combination in an embodiment of the present invention;

FIG. 6 is a cross-sectional view of the lower beam and the working platform in combination according to an embodiment of the present invention;

FIG. 7 is a first view of the center sill and fluid filled seal plate in an assembled configuration in accordance with an embodiment of the present invention;

FIG. 8 is a second view of the center sill and fluid filled seal plate in an assembled configuration in accordance with an embodiment of the present invention;

FIG. 9 is a cross-sectional view of the center sill and liquid filled closure plate in an assembled state in accordance with an embodiment of the present invention;

FIG. 10 is a cross-sectional view of the center sill and liquid filled closure plate in an assembled state in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of a power head and an upper beam in an assembled state according to an embodiment of the present invention;

FIG. 12 is a first cross-sectional view of the power head and the upper beam in an assembled state according to an embodiment of the present invention;

FIG. 13 is a cross-sectional view of the power head and the upper beam in an assembled state according to an embodiment of the present invention;

FIG. 14 is a third cross-sectional view of the power head and the upper beam in an assembled state according to an embodiment of the present invention;

FIG. 15 is a cross-sectional view of the power head and the upper beam in an assembled state according to an embodiment of the present invention;

FIG. 16 is a first schematic sectional view of the upper beam, the middle beam, the upper header chamber and the lower header chamber of an embodiment of the present invention during an impact forming stage;

FIG. 17 is a second schematic sectional view of the upper beam, the middle beam, the upper header chamber and the lower header chamber of an embodiment of the present invention during an impact forming stage;

FIG. 18 is a schematic view of an upper cut-off chamber in an embodiment of the present invention;

FIG. 19 is a schematic cross-sectional view of a lower intercepting chamber in an embodiment of the present invention;

FIG. 20 is a schematic view showing a combination state between the upper water intercepting chamber and the lower water intercepting chamber in the embodiment of the present invention;

FIG. 21 is a schematic view of a small cartridge valve in an embodiment of the present invention.

The lower beam 100, the lower ejection oil cylinder 110, the slide rail 120 and the mold pushing oil cylinder 130; a table 200, a platen 210, a support base 220, a movable table 230, and a guide plate 231; the mould lifting device comprises a centre sill 300, a mould lifting guide rail 310, a double lug ring connection type traction oil cylinder 320, a guide rail adjusting seat 330, a sliding block 340, a water inlet channel 350, a water inlet one-way valve 351, a water outlet channel 360 and a water drainage valve 361; a lower water intercepting chamber 400, a transverse hole 410, an exhaust vertical hole 420 and an annular groove 430; the device comprises an upper beam 600, a lifting oil cylinder 610, a locking cylinder barrel 620, a hammer head locking cylinder guide sleeve 630 and a hammer head locking cylinder piston rod 640; an upper water intercepting chamber 700, a radial exhaust groove 710, an annular exhaust groove 720, a stepped through hole 730 and a locking pin 740; an impact hammer head 800; the impact power head 900, the energy accumulator 910, the energy accumulator valve block 920, the oil pressure cavity 921, the impact 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 hole 953, the lower oil inlet 954, the upper charging valve 960, the lower charging valve 970, the impact cylinder anti-impact sleeve 980, the limit pin 981, the large cartridge valve 990 and the small cartridge valve 9100; side posts 1000, longitudinal rails 1100; support body 2000, oil tank 2100.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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 thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 4, a large liquid-filled impact composite forming apparatus is provided with a lower beam 100, a middle beam 300, and an upper beam 600 in sequence from bottom to bottom; a lower jacking oil cylinder 110 is arranged in the lower beam 100, a working table 200 is jacked when a piston rod of the lower jacking oil cylinder 110 moves upwards, a die is arranged on the working table 200, a workpiece blank is placed at a proper position of the die and covered with a die blank cover plate; the middle beam 300 is internally provided with a lower water intercepting chamber 400, the upper end and the lower end of the lower water intercepting chamber 400 are respectively opened, the inner wall of the lower water intercepting chamber 400 is annularly provided with transverse holes 410, the transverse holes 410 are used for water inflow or water drainage through a water path on the middle beam 300, the top surface of the middle beam 300 is provided with a liquid filling sealing plate 500, the upper end opening of the lower water intercepting chamber 400 is opened or closed by moving the liquid filling sealing plate 500, the edge of the middle beam 300 is connected with a piston rod of a lifting oil cylinder 610, and the lifting oil cylinder 610 is fixed at the top of the upper beam 600; an upper water intercepting chamber 700 is arranged in the upper beam 600, the upper end and the lower end of the upper water intercepting chamber 700 are respectively opened, and the lower port of the upper water intercepting chamber 700 corresponds to the upper port of the lower water intercepting chamber 400; the impact hammer head 800 extends into the upper water intercepting chamber 700, and the impact hammer head 800 impacts downwards in the upper water intercepting chamber 700 under the thrust provided by the impact power head 900.

In operation, the liquid filling sealing plate 500 moves to the center of the center sill 300, the upper port of the lower water intercepting chamber 400 is sealed, the center sill 300 moves upwards through the lifting oil cylinder 610, the liquid filling sealing plate 500 is tightly abutted to the bottom surface of the upper water intercepting chamber 700, the piston rod of the lower jacking oil cylinder 110 jacks the workbench 200 provided with the die and the workpiece blank to be tightly abutted to the bottom surface of the lower water intercepting chamber 400, the lower port of the lower water intercepting chamber 400 is sealed, liquid with required pressure is filled in the lower water intercepting chamber 400 for forming, and the workpiece blank is made to be liquid filling stretch-formed with most characteristics, so that liquid filling forming is completed; the liquid filling seal plate 500 moves to open the upper port of the lower water intercepting chamber 400, the lifting oil cylinder 610 and the lower top oil cylinder 110 enable the workbench 200 and the middle beam 300 to simultaneously move upwards, the upper port of the lower water intercepting chamber 400 is abutted against the lower port of the upper water intercepting chamber 700, the upper water intercepting chamber 700 and the lower water intercepting chamber 400 form a complete water chamber, water is filled in the complete water chamber to a specified water level, the impact power head 900 pushes the impact hammer head 800 downwards, the impact hammer head 800 impacts liquid in the complete water chamber, high-energy high-speed impact forming can be carried out on a workpiece blank, and the workpiece blank is formed with local small characteristics; the device can successively implement a liquid-filling forming process and a high-energy high-integrity forming process, so as to solve the problem that the liquid-filling forming technology is difficult to form local characteristic dimensions such as small concave angles, small indentations and the like at one time, avoid increasing the tonnage of equipment, reduce the production cost, improve the position precision of the local characteristic dimensions, improve the integral performance of parts, and provide a liquid-filling forming device with a liquid-filling forming area of 1000000mm²The large-scale liquid-filled impact composite forming device has the advantages that the liquid-filled forming force can reach 5000T, and the impact forming energy reaches 750000J.

Referring to fig. 5 and 6, the work table 200 includes a table 210, a support base 220, the support base 220 being lifted and lowered by a piston rod of the lower top cylinder 110, and a mold being placed on the table 210; the movable table 230 is externally installed on the support base 220, and when the support base 220 descends along with the piston rod of the lower top cylinder 110, the platen 210 is placed on the movable table 230 and supported by the movable table 230.

Guide plates 231 are fixed at the bottoms of the left side and the right side of the movable workbench 230, a slide rail 120 matched with the guide plates 231 is arranged at the top of the lower beam 100, the slide rail 120 extends towards the front of the lower beam 100, a mold pushing cylinder 130 is fixed at the rear side of the lower beam 100 through a bracket, and a piston rod of the mold pushing cylinder 130 is connected with the movable workbench 230; the workbench 200 is moved out of the device or into the device along with the movable workbench 230 by the mold-pushing oil cylinder 130 on the slide rail 120, a mold, a workpiece blank and a blank cover plate are placed outside the device and then moved into the device, and after the machining is finished, the workpiece is moved out of the device, so that the workpiece which is finished to be machined can be conveniently taken out.

Referring to fig. 7 to 10, the liquid filling closing plate 500 is provided at the bottom thereof with sliding positions 510 at the left and right sides, the top surface of the center sill 300 is provided with mold lifting guide rails 310 engaged with the sliding positions 510, and the mold lifting guide rails 310 extend toward the rear of the center sill 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 die lifting guide rail 310 through the double-lug ring connecting type traction oil cylinders 320 arranged on the left side and the right side of the liquid filling sealing plate 500, and the upper port of the lower intercepting chamber 400 is sealed; during the impact forming process, the liquid-filled sealing plate 500 can be pushed away from the top surface of the center sill 300 by the pulling cylinder 320 with the double earrings coupling, so that the upper port of the lower intercepting chamber 400 is opened.

Because the liquid filling seal plate 500 is tightly attached to the top surface of the center sill 300 during the liquid filling forming process in order to ensure the sealing of the lower intercepting chamber 400, the end of the piston rod of the two-earring coupling type traction cylinder 320 is rotatably mounted on the left and right sides of the liquid filling seal plate 500 after the liquid filling forming process is completed, the tail end of the two-earring coupling type traction cylinder 320 is rotatably mounted on the top surface of the center sill 300, the lower top cylinder 110 and the lifting cylinder 610 simultaneously move downward before the liquid filling seal plate 500 is pushed out, the liquid filling seal plate 500 is separated from the lower end surface of the upper intercepting chamber 700, the liquid filling seal plate 500 is lifted, and the two-earring coupling type traction cylinders 320 push the liquid filling seal plate 500 out.

An annular groove 430 is formed outside the lower water intercepting chamber 400, the rear end of the transverse hole 410 is opened on the annular groove 430, a water inlet channel 350 and a water outlet channel 360 are respectively arranged in the middle beam 300, the water inlet channel 350 and the water outlet channel 360 are communicated with the annular groove 430, a drain valve 361 for controlling the water outlet channel 360 is arranged on the middle beam 300, and a water inlet one-way valve 351 for controlling the water inlet channel 350 is arranged on the middle beam 300.

Referring to fig. 1 and 3, side columns 1000 are fixedly connected to the left and right sides of an upper beam 600 and a lower beam 100 respectively, the upper beam 600 and the lower beam 100 form a rack through the side columns 1000, two longitudinal guide rails 1100 are mounted on the two side columns 1000 respectively, four guide rail adjusting seats 330 are mounted on a middle beam 300, sliders 340 matched with the longitudinal guide rails 1100 are mounted on the guide rail adjusting seats 330, the middle beam 300 moves up and down on the longitudinal guide rails 1100, and therefore the upper water intercepting chamber 700 and the lower water intercepting chamber 400 can be ensured to be in a coaxial state when opened and closed, and dislocation is avoided.

Referring to fig. 17 to 19, during impact forming, the impact hammer head 800 moves downward at a high speed in the complete water chamber formed by the upper water intercepting chamber 700 and the lower water intercepting chamber 400, and if air in the complete water chamber cannot be discharged quickly, resistance to the impact hammer head 800 is generated, so that the impact hammer cannot generate high-speed impact action; therefore, the bottom surface of the upper water intercepting chamber 700 is provided with radial exhaust grooves 710 which are uniformly arranged, the bottom surface of the upper water intercepting chamber 700 is provided with an annular exhaust groove 720, and the annular exhaust groove 720 penetrates through the radial exhaust grooves 710 to ensure that the radial exhaust grooves 710 are communicated; the exhaust vertical holes 420 are uniformly arranged at the top of the lower water intercepting chamber 400 along the longitudinal direction, the exhaust vertical holes 420 are communicated with the transverse holes 410, and the opening position at the top of the exhaust vertical holes 420 is matched with the position of the annular exhaust groove 720. When the hammer head 800 is still moving in the upper water intercepting chamber 700, the compressed air is discharged from the radial air discharge grooves 710 on the lower end surface of the upper water intercepting chamber 700, and when the hammer head 800 moves into the lower water intercepting chamber 400, the compressed air enters the air discharge vertical holes 420 through the transverse holes 410, enters the annular air discharge grooves 720 and is discharged through the radial air discharge grooves 710.

Referring to fig. 15 and 16, when the hydraulic oil in the impact power head 900 enters the oil pressure chamber 921, the impact ram 800 is not strongly locked, and may instantly 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 yet reached the set pressure value, and the impact velocity and the impact energy of the impact ram 800 also do not reach the set value, so it is necessary to ensure that the impact ram 800 is strongly locked before reaching the set pressure value.

A locking cylinder barrel 620 is arranged on the upper beam 600, an inner hole groove 620 of the locking cylinder barrel is positioned on the outer side of the upper water intercepting chamber 700, a hammerhead locking cylinder piston rod 640 is arranged in the locking cylinder barrel, stepped through holes 730 are arranged on the inner wall of the upper water intercepting chamber 700, locking pins 740 are inserted in the stepped through holes 730, at least 30 locking pins 740 are arranged, and the tail end of each locking pin 740 extends into the inner cavity of the locking cylinder piston rod 640; the bottom of the locking cylinder barrel 620 is closed by a hammerhead locking cylinder guide sleeve 630.

When the impact forming processing is carried out, oil is discharged from the upper cavity of the locking cylinder barrel 620, oil is fed into the lower cavity of the locking cylinder barrel 620, the piston rod 640 of the hammer locking cylinder is enabled to move upwards, the locking pin 740 retracts into the stepped through hole 730 after the blocking of the locking pin 740 is removed, and the impact hammer 800 impacts downwards at a high speed; after the high-energy high-speed impact forming processing is completed, the lower cavity of the locking cylinder barrel 620 is drained, oil is fed into the upper cavity of the locking cylinder barrel 620, the hammer head locking cylinder piston rod 640 moves downwards, the locking pin 740 is pushed by the hammer head locking cylinder piston rod 640 to extend outwards, and the impact hammer head 800 is locked.

Referring to fig. 11 to 15 and 21, the impact power head 900 includes an energy accumulator 910, an energy accumulator valve block 920, a large cartridge valve 990, a small cartridge valve 9100 and an impact cylinder 930, the energy accumulator 910 is mounted on the energy accumulator valve block 920, an oil pressure chamber 921 is arranged in the energy accumulator valve block 920, the oil pressure chamber 921 and the energy accumulator 910 are controlled by the large cartridge valve 990 to be disconnected or communicated, the bottom of the oil pressure chamber 921 and the energy accumulator 910 is provided with the impact cylinder 930, an impact cylinder piston rod 940 is mounted in the impact cylinder 930, and the bottom end of the impact cylinder piston rod 940 is connected with the impact hammer 800; the accumulator 910 provides high-pressure hydraulic oil for the oil pressure chamber 921, and when the oil pressure in the oil pressure chamber 921 reaches a predetermined 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 push downward for impact forming.

The energy accumulator valve block 920 is connected with the upper beam 600 through a support body 2000, and an oil tank 2100 is arranged on the support body 2000; the inner wall of the lower section of the impact cylinder barrel 930 is provided with a pressure relief hole 931, the lower end of the impact cylinder barrel 930 is sleeved with an impact cylinder buffering sleeve 950, the impact cylinder buffering sleeve 950 is 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 liquid charging valve 960, the lower oil discharge channel 952 is controlled by a lower liquid charging valve 970, and the upper liquid charging valve 960 and the lower liquid charging valve 970 are communicated with the oil tank 2100 through oil pipes respectively.

The lower oil inlet 954 is communicated with the small cartridge valve 9100, when the impact cylinder piston rod 940 moves to the end of an impact stroke, oil in the inner cavity of the oil pressure cavity 921 and the inner cavity of the impact cylinder barrel 930 flows to the lower part of the top end of the impact cylinder piston rod 940 through the lower cartridge valve 9100 through the lower oil inlet 954, and the impact cylinder piston rod 940 starts to return under the oil pressure.

When the upper end face of the piston rod of the impact oil cylinder is punched downwards to enter the upper edge of the pressure relief hole 931, high-pressure oil of the piston rod is pushed to enter an upper oil drainage channel 951 from an oil drainage hole, so that the oil pressure of hydraulic oil is reduced immediately, and the upper oil charging valve 960 opens the upper oil drainage channel 951 to enable the hydraulic oil to return to the oil tank 2100; at this time, the lower end surface of the impact hammer 800 contacts the impacted liquid level, the impact piston rod and the hammer impact downwards by inertia, and the impact piston rod is prevented from bending.

Because the resistance of the hydraulic oil is larger than that of the air, in order to reduce the resistance on the lower cavity of the cylinder barrel 930 of the impact cylinder and the lower end surface of the impact hammer 800, the oil in the lower cavity of the impact cylinder is blown away before the impact forming processing is carried out, the lower oil discharge channel 952 is provided with a vent hole 953, compressed air is externally connected to the vent hole 953, and the lower liquid filling valve 970 is opened, so that the oil in the lower oil discharge channel 952 is blown into the oil tank 2100, and the resistance is reduced to increase the impact speed.

After the impact cylinder piston rod 940 and the impact hammer head 800 complete downward impact action, the piston rod must move upwards to complete return action, if the position of the impact cylinder piston is not limited, overshoot phenomenon can occur on the piston rod, and therefore the device fails due to the fact that the impact hammer head 800 falls off or the impact cylinder guide sleeve is broken down, therefore, an impact cylinder impact prevention sleeve 980 is arranged in the oil pressure cavity 921, a limiting pin 981 is arranged in the center of the impact cylinder impact prevention sleeve 980, the impact cylinder piston rod 940 keeps still after the return stroke of the impact cylinder piston rod 940 touches the limiting pin 981, and accurate positioning after the return stroke of the piston rod is ensured.

Referring to fig. 1 to 4, in addition, the present embodiment also relates to a method for using a large liquid-filled impact composite forming apparatus, comprising the following steps:

(1) the mold-pushing oil cylinder 130 pushes the movable workbench 230 out of the device, the workbench 200 is pushed out along with the movable workbench 230, the mold is installed on the workbench 200, a workpiece blank is placed at a proper position of the mold and covered with a mold blank cover plate, and the mold-pushing oil cylinder 130 resets the workbench 200 and the movable workbench 230; the lower jacking oil cylinder 110 jacks the workbench 200, and a die, a workpiece blank and a blank cover plate are jacked and attached to the bottom surface of the middle beam 300, so that the lower port of the lower water intercepting chamber 400 is closed;

(2) the double-earring-coupled traction oil cylinder 320 pushes the liquid filling sealing plate 500 back to the center of the center sill 300, and the liquid filling sealing plate 500 seals the upper port of the lower intercepting chamber 400;

(3) filling the closed lower intercepting chamber 400 with a low-pressure aqueous solution, enabling the lifting oil cylinder 610 and the lower ejection oil cylinder 110 to move upwards, enabling the liquid filling sealing plate 500 to be attached to the bottom surface of the upper intercepting chamber 700, and adjusting the oil pressure of the lower ejection oil cylinder to form a preset edge pressing force;

(4) filling the closed lower intercepting chamber 400 with liquid at the pressure required by workpiece forming, so that most of the characteristics of the workpiece blank are subjected to liquid filling stretching forming, and the liquid filling forming process is completed;

(5) the lower top oil cylinder 110 and the lifting oil cylinder 610 simultaneously move downwards, the liquid filling sealing plate 500 is separated from the bottom surface of the upper water intercepting chamber 700, the liquid filling sealing plate 500 is lifted, the two double-earring-connected traction oil cylinders 320 push the liquid filling sealing plate 500 out, and the upper port of the lower water intercepting chamber 400 is opened;

(6) the lifting oil cylinder 610 retracts, the lower jacking cylinder jacks up, and an opening at the upper end of the lower water intercepting chamber 400 and an opening at the lower end of the upper water intercepting chamber 700 are tightly attached to form a complete water chamber, so that the workbench 200, the die, the workpiece blank which is subjected to liquid filling stretch forming, the blank cover plate, the middle beam 300 and the upper water intercepting chamber 700 form a whole;

(7) filling water into the complete water chamber to enable the water level to reach a preset position;

(8) the vent hole 953 fills compressed air into the lower oil discharge passage 952 of the surge tank cushion 950, and blows all hydraulic oil into the oil tank 2100;

(9) the hammer head locking cylinder piston rod 640 moves downwards to eject the locking pin 740, and the impact hammer head 800 is locked; meanwhile, the large cartridge valve 990 on the energy accumulator valve block 920) is opened, the small cartridge valve 9100 is closed, and high-pressure oil in the energy accumulator 910 is filled into the oil pressure cavity 921;

(10) the hammer head locking cylinder piston rod 640 moves upwards, the impact hammer head 800 is unlocked, and the impact cylinder piston rod 940 drives the impact hammer head 800 to impact downwards under the pushing of high-pressure hydraulic oil of the energy accumulator 910, so that high-energy high-speed impact forming is realized;

(11) accumulator valve block 920) large cartridge valve 990 closes and the accumulator 910 fills; the small cartridge valve 9100 is opened, the lower oil inlet 954 supplies oil, the impact cylinder piston rod 940 drives the hammer to rise to the highest position, the hammer locking cylinder piston rod 640 moves downwards to eject the locking pin 740, and the impact hammer 800 is locked;

(12) the lower jacking oil cylinder 110 moves downwards to reset the workbench 200; the mold-pushing oil cylinder 130 pushes the movable workbench 230 together with the workbench 200, and the blank pressing plate and the workpiece blank which is finished to be processed are taken down;

(13) and (5) working steps (1) to (12) in a circulating mode.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A large liquid-filled impact composite forming device is characterized by comprising:

the lower beam (100) is internally provided with a lower jacking oil cylinder (110);

the workbench (200) is positioned above the lower beam (100), and the workbench (200) is lifted and lowered by a piston rod of the lower top oil cylinder (110);

a center sill (300), the center sill (300) being located above the table (200);

the lower water intercepting chamber (400), the lower water intercepting chamber (400) is arranged in the center sill (300), the upper end and the lower end of the lower water intercepting chamber (400) are respectively opened, transverse holes (410) are arranged on the inner wall of the lower water intercepting chamber (400) in a surrounding mode, and the transverse holes (410) are used for water inflow through a water inlet channel (350) on the center sill (300) or water drainage through a water outlet channel (360);

the liquid filling sealing plate (500) is arranged on the top surface of the center sill (300), and the liquid filling sealing plate (500) is used for opening or closing the upper end opening of the lower water intercepting chamber (400);

the lifting device comprises an upper beam (600), wherein a lifting oil cylinder (610) is arranged at the top of the upper beam (600), and a piston rod of the lifting oil cylinder (610) penetrates through the upper beam (600) and is fixedly connected with a middle beam (300);

the upper water intercepting chamber (700) is arranged in the upper beam (600), the upper end and the lower end of the upper water intercepting chamber (700) are respectively opened, and the lower port of the upper water intercepting chamber (700) corresponds to the upper port of the lower water intercepting chamber (400);

the impact hammer head (800) extends into the upper water intercepting chamber (700) and can impact downwards in the upper water intercepting chamber (700);

and the impact power head (900), wherein the impact power head (900) provides thrust for the impact hammer head (800).

2. The large liquid-filled impact composite forming device according to claim 1, wherein the workbench (200) comprises a bedplate (210) and a supporting base (220), a movable workbench (230) is sleeved outside the supporting base (220), the movable workbench (230) supports the bedplate (210), guide plates (231) are fixed at the bottoms of the left side and the right side of the movable workbench (230), a slide rail (120) matched with the guide plates (231) is arranged at the top of the lower beam (100), and the slide rail (120) extends to the front of the lower beam (100); a mold pushing oil cylinder (130) is fixed on the rear side of the lower beam (100) through a bracket, and a piston rod of the mold pushing oil cylinder (130) is connected with the movable workbench (230).

3. The large liquid-filled impact composite forming device according to claim 1, wherein the liquid-filled sealing plate (500) is provided at the bottom thereof with sliding positions (510) at the left and right sides, the top surface of the center sill (300) is provided with mold lifting guide rails (310) engaged with the sliding positions (510), and the mold lifting guide rails (310) extend toward the rear of the center sill (300); the left side and the right side of the liquid filling sealing plate (500) are respectively provided with a double-lug-ring connection type traction oil cylinder (320), and the tail end of the double-lug-ring connection type traction oil cylinder (320) is arranged on the top surface of the middle beam (300).

4. The large liquid-filled impact composite forming device according to claim 1, wherein the upper beam (600) and the lower beam (100) are fixedly connected with side columns (1000) at the left and right sides respectively, and longitudinal guide rails (1100) are arranged on the side columns (1000); the middle beam (300) is provided with a guide rail adjusting seat (330), and the guide rail adjusting seat (330) is provided with a sliding block (340) matched with the longitudinal guide rail (1100).

5. A large liquid-filled impact composite forming device according to claim 1, wherein the bottom surface of the upper water intercepting chamber (700) is provided with radial exhaust grooves (710) which are uniformly arranged, the bottom surface of the upper water intercepting chamber (700) is provided with an annular exhaust groove (720), and the annular exhaust groove (720) penetrates through the radial exhaust grooves (710); the top of the lower water intercepting chamber (400) is uniformly provided with exhaust vertical holes (420) along the longitudinal direction, the exhaust vertical holes (420) are communicated with the transverse holes (410), and the opening position of the top of each exhaust vertical hole (420) is matched with the position of the annular exhaust groove (720).

6. The large-scale liquid-filled impact composite forming device according to claim 1, wherein a locking cylinder barrel (620) is arranged on the upper beam (600), a hammerhead locking cylinder piston rod (640) is arranged in the locking cylinder barrel (620), stepped through holes (730) are arranged on the inner wall of the upper water intercepting chamber (700), a locking pin (740) is inserted in the stepped through holes (730), and the tail end of the locking pin (740) extends into the inner cavity of the hammerhead locking cylinder piston rod (640); the bottom of the locking cylinder barrel (620) is sealed through a hammer head locking cylinder guide sleeve (630), and the hammer head locking cylinder piston rod (640) pushes the locking pin (740) out of the stepped through hole (730) through pressing.

7. The large-scale liquid-filled impact composite forming device according to claim 1, wherein the impact power head (900) comprises an energy accumulator (910), an energy accumulator valve block (920), an impact cylinder barrel (930), a large cartridge valve (990) and a small cartridge valve (9100), the small cartridge valve (9100) is communicated with the oil pressure cavity (921), the energy accumulator (910) is mounted on the energy accumulator valve block (920), an oil pressure cavity (921) is arranged in the energy accumulator valve block (920), the oil pressure cavity (921) and the energy accumulator (910) are controlled by the large cartridge valve (990) to be disconnected or communicated, the impact cylinder barrel (930) is mounted at the bottom of the oil pressure cavity (921), an impact cylinder piston rod (940) is mounted in the impact cylinder barrel (930), and the bottom end of the impact cylinder piston rod (940) is connected with the impact hammer head (800).

8. A large-scale liquid-filled impact composite forming device according to claim 7, wherein the accumulator valve block (920) is connected with the upper beam (600) through a support body (2000), and an oil tank (2100) is arranged on the support body (2000); a pressure relief hole (931) is arranged on the inner wall of the lower section of the impact cylinder barrel (930), an impact cylinder buffering sleeve (950) is sleeved outside 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 lower oil inlet (954) is communicated with the small cartridge valve (9100), the upper oil discharging channel (951) is communicated with the pressure relief hole (931), the upper oil discharge passage (951) is controlled by an upper liquid charging valve (960), the lower oil discharge passage (952) is controlled by a lower liquid charging valve (970), the lower oil discharge channel (952) is provided with a vent hole (953), the upper liquid charging valve (960) and the lower liquid charging valve (970) are respectively communicated with the oil tank (2100) through oil pipes, the lower oil inlet (954) is used for injecting oil into the impact cylinder buffer sleeve (950).

9. The large liquid-filled impact composite forming device according to claim 7, wherein an impact cylinder impact-prevention sleeve (980) is arranged in the oil pressure chamber (921), a limit pin (981) is arranged in the center of the impact cylinder impact-prevention sleeve (980), and after the impact cylinder piston rod (940) returns, the bottom of the limit pin (981) is abutted against the top of the impact cylinder piston rod (940).

10. The use method of the large-scale liquid-filled impact composite forming device is characterized by comprising the following steps of:

(1) the mold pushing oil cylinder (130) pushes the movable workbench (230) out of the device, the workbench (200) is pushed out along with the movable workbench (230), the mold is installed on the workbench (200), a workpiece blank is placed at a proper position of the mold and covered with a mold blank cover plate, and the workbench (200) and the movable workbench (230) are reset by the mold pushing oil cylinder (130); the lower jacking oil cylinder (110) jacks the workbench (200), and a die, a workpiece blank and a blank cover plate are jacked and attached to the bottom surface of the middle beam (300), so that the lower port of the lower water intercepting chamber (400) is closed;

(2) the double-earring-connected 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) seals the upper port of the lower water intercepting chamber (400);

(3) filling the closed lower water intercepting chamber (400) with a low-pressure water solution, enabling the lifting oil cylinder (610) and the lower ejection oil cylinder (110) to move upwards, enabling the liquid filling sealing plate (500) to be attached to the bottom surface of the upper water intercepting chamber (700), and adjusting the oil pressure of the lower ejection oil cylinder to form a preset edge pressing force;

(4) filling liquid with pressure required by workpiece forming into the closed lower water intercepting chamber (400), so that most of characteristics of the workpiece blank are subjected to liquid filling stretching forming, and the liquid filling forming process is completed;

(5) the lower top oil cylinder (110) and the lifting oil cylinder (610) move downwards simultaneously, the liquid filling sealing plate (500) is separated from the bottom surface of the upper water intercepting chamber (700), the liquid filling sealing plate (500) is lifted, the two double-earring-connected traction oil cylinders (320) push the liquid filling sealing plate (500) out, and the upper port of the lower water intercepting chamber (400) is opened;

(6) the lifting oil cylinder (610) retracts, the lower jacking cylinder jacks up, an opening at the upper end of the lower water intercepting chamber (400) and an opening at the lower end of the upper water intercepting chamber (700) are tightly attached to form a complete water chamber, and the workbench (200), the die, the workpiece blank which is subjected to liquid filling stretch forming, the blank cover plate, the middle beam (300) and the upper water intercepting chamber (700) form a whole;

(7) filling water into the complete water chamber to enable the water level to reach a preset position;

(8) compressed air is filled into a lower oil discharge channel (952) of the impact cylinder buffer sleeve (950) through the vent hole (953), and all hydraulic oil is blown into the oil tank (2100);

(9) a piston rod (640) of the hammer head locking cylinder descends to eject the locking pin (740) and lock the impact hammer head (800); meanwhile, a large cartridge valve (990) on the energy accumulator valve block (920) is opened, a small cartridge valve (9100) is closed, and high-pressure oil in the energy accumulator (910) is filled into the oil pressure cavity (921);

(10) a piston rod (640) of a hammer head locking cylinder ascends, the impact hammer head (800) is unlocked, and a piston rod (940) of the impact cylinder drives the impact hammer head (800) to impact downwards under the pushing of high-pressure hydraulic oil of an energy accumulator (910), so that high-energy high-speed impact forming is realized;

(11) the large cartridge valve (990) on the energy accumulator valve block (920) is closed, and the energy accumulator (910) is charged; the small cartridge valve (9100) is opened, the lower oil inlet (954) supplies oil, the piston rod (940) of the impact oil cylinder drives the hammer to rise to the highest position, the piston rod (640) of the hammer locking cylinder moves downwards to eject the locking pin (740), and the impact hammer (800) is locked;

(12) the lower jacking oil cylinder (110) descends to reset the workbench (200); the mold pushing oil cylinder (130) pushes the movable workbench (230) together with the workbench (200), and the blank pressing plate and the workpiece blank which is processed are taken down;

(13) and (5) working steps (1) to (12) in a circulating mode.

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