Positionable feeding high-strength metal plate part oil pressure equipment

Abstract

The application discloses a high-strength metal plate positioning and feeding oil pressure equipment, and particularly relates to the field of metal stamping, which comprises a rack, a main oil tank fixedly connected in the rack, an upper pressing assembly installed on the top of the rack, an upper die connected to the output end of the upper pressing assembly, a lower workbench fixedly connected to the rack, two symmetrical lifting assemblies installed at the bottom of the lower workbench, and a lower die connected to the output end of the lifting assembly. The upper pressing assembly is used for driving the upper die to move towards the lower die, and the lifting assembly is used for driving the lower die to move along a preset direction. The centering assembly drives multiple conical positioning pins to move synchronously, thereby realizing automatic positioning of the metal plate. The symmetrical force ensures that the plate is uniformly guided to the center and cannot be deviated or twisted during the positioning process, thereby ensuring that the center of the plate is completely coincident with the center of the die, laying a perfect foundation for subsequent uniform stretching, wrinkle prevention and crack prevention.

Description

A hydraulic device for high-strength metal sheet material with positioning and feeding capability Technical Field

[0001] This invention relates to the field of metal stamping technology, and more specifically, to a hydraulic device for positioning and feeding high-strength metal sheets. Background Technology

[0002] Hydraulic press equipment for high-strength metal sheets is a type of hydraulic machinery specifically designed for processing high-strength metal materials. It is mainly used in metal stamping, stretching, bending, and precision forming processes. Its core function is to generate ultra-high pressure through a hydraulic system to maintain the structural stability of high-strength metal sheets during plastic deformation, while avoiding material cracking or springback problems that may occur with traditional mechanical stamping. It is suitable for fields with extremely high precision requirements, such as automotive body parts and aerospace thin-walled parts.

[0003] Traditional high-strength metal sheet hydraulic forming equipment generally relies on mechanical stops or basic visual alignment in the material loading and positioning stage. These crude positioning methods are insufficient for high-end manufacturing fields with extremely high precision and consistency requirements, such as automotive safety structural components and aerospace thin-walled frames and skins. Due to significant alignment deviations between the initial sheet metal and the mold cavity center, the stress on different areas of the sheet metal is severely uneven during subsequent high-pressure forming, leading to unstable material rheological behavior. This directly induces macroscopic symmetry imbalances in the formed parts, excessive wall thickness in key assembly areas, and difficulty in subsequent straightening. Eliminating defects such as wrinkling and localized thinning can severely impact the pressure-bearing capacity and fatigue life of thin-walled cabin structures in the aerospace field. In the automotive field, such deviations can lead to deviations from the design-expected collision force transmission path, jeopardizing passive safety. In more severe cases, instantaneous tearing can occur in areas of drastic material flow gradient changes or stress concentration at mold fillet corners, causing the overall structural strength and appearance quality of the product to fail to meet stringent industry standards, resulting in a high scrap rate. This problem is particularly prominent when dealing with difficult-to-deform materials such as hot-formed steel, titanium alloys, and aluminum-lithium alloys.

[0004] In summary, to improve product manufacturing quality, it is necessary to address the problem of low positioning accuracy in traditional high-strength metal sheet hydraulic equipment, which leads to obvious quality defects in the formed metal sheets and increases production costs. The solution is to enable hydraulic equipment to automatically and accurately position metal sheets. Summary of the Invention

[0005] The present invention provides a hydraulic press for high-strength metal sheet material with positioning and feeding capability. The problem to be solved is that the positioning accuracy of traditional hydraulic press for high-strength metal sheet material is low, which leads to obvious quality defects in the formed metal sheet material and increases production costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic device for high-strength metal sheet material with positioning and feeding capability, comprising a frame and a main oil tank fixedly connected within the frame. An upper pressing component and a lower worktable are mounted on the frame. An upper mold is connected to the output end of the upper pressing component. A recovery component is mounted at the bottom of the lower worktable, and its output end is connected to the lower mold. The upper pressing component is used to drive the upper mold to move closer to or further away from the lower mold. The recovery component is used to drive the lower mold to move vertically. Several guide rods are connected between the upper pressing component and the frame. Several sliding rods are fixedly connected to the lower worktable. The sliding rods are slidably connected to the lower mold. A mold core is provided at the center of the lower mold and is fixedly connected to the lower worktable. Several sliding grooves are provided on the lower mold. A centering component is installed inside the lower mold. Several conical positioning pins are connected to the output end of the centering component. The conical positioning pins are slidably connected to the sliding grooves. The centering component is used to drive the conical positioning pins to move along the sliding grooves. An air chamber, several gas channels, and several exhaust holes are sequentially provided inside the mold core from bottom to top.

[0007] In a preferred embodiment, the pressing assembly includes a first hydraulic cylinder fixedly connected to the frame, a first piston slidably connected at one end to the first hydraulic cylinder, and an upper worktable fixedly connected to the other end of the first piston. The first hydraulic cylinder is connected to the main oil tank through a pipe. The upper worktable is fixedly connected to several guide rods, which are slidably connected to the frame. When hydraulic oil flows between the main oil tank and the first hydraulic cylinder, the first piston drives the upper worktable to move in the vertical direction.

[0008] In a preferred embodiment, the recovery assembly includes a second hydraulic cylinder fixedly connected to the lower worktable and a second piston slidably connected at one end inside the second hydraulic cylinder. The second hydraulic cylinder is connected to the main oil tank through a pipe, and the other end of the second piston is fixedly connected to the lower mold. When hydraulic oil flows between the main oil tank and the second hydraulic cylinder, the second piston drives the lower mold to move in the vertical direction.

[0009] In a preferred embodiment, the centering assembly includes a first electric push rod fixedly connected to the lower mold, a double rack fixedly connected at one end to the output end of the first electric push rod, two gears rotatably connected to the lower mold, and two irregular rack rods with one end respectively meshing with the corresponding gears. The double rack is meshed with the two gears, and the other end of the double rack and the other end of the irregular rack rod are fixedly connected to a tapered locating pin. The first electric push rod is used to drive the double rack to move in a preset direction. When the double rack moves, the tapered locating pin moves closer to or further away from the mold core.

[0010] In a preferred embodiment, an air compressor and a vacuum pump are fixedly connected to the frame. The output ends of the air compressor and the vacuum pump are each equipped with a pipe connection assembly. The output end of the pipe connection assembly is connected to a filter. An activated carbon box is fixedly connected to the filter. The activated carbon box is connected to the air chamber through a pipe.

[0011] In a preferred embodiment, the pipeline connection assembly includes a three-way control valve fixedly connected to the frame, an air pressurization pipe fixedly connected between the three-way control valve and the air compressor, a vacuum extraction pipe fixedly connected between the three-way control valve and the vacuum pump, and a main delivery pipe fixedly connected between the three-way control valve and the filter.

[0012] The three-way control valve is used to control the connection between the air pressurization pipe and the main delivery pipe, or to control the connection between the vacuum extraction pipe and the main delivery pipe.

[0013] In a preferred embodiment, a temporary storage platform is provided between adjacent racks, and a mounting housing is provided on one side of the temporary storage platform. A swing assembly is installed inside the mounting housing, and the output end of the swing assembly is connected to a drive arm. The swing assembly is used to drive the drive arm to move in a preset direction, and several cantilever arms are fixedly connected to the drive arm.

[0014] In a preferred embodiment, the swing assembly includes a stepper motor fixedly connected to the mounting housing, a disk fixedly connected to the output end of the stepper motor via a shaft, an eccentric cylinder fixedly connected to the disk at one end, and a swing arm rotatably connected to the mounting housing at one end. The other end of the swing arm is rotatably connected to a drive arm, and the other end of the eccentric cylinder is slidably connected to a limiting groove on the swing arm. The stepper motor is used to drive the disk to rotate.

[0015] In a preferred embodiment, two symmetrical second electric push rods are fixedly connected to the cantilever, and a weighing plate is fixedly connected to the output end of the second electric push rod. The second electric push rod is used to drive the weighing plate to move in a preset direction.

[0016] In a preferred embodiment, several negative pressure suction cups are fixedly connected below the weighing plate. The weighing plate has a built-in gravity sensing module that detects the gravity value of the metal plate and transmits an electrical signal to the air compressor. A limit slide rail is installed on the temporary storage platform, and the cantilever is slidably connected to the limit slide rail.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention uses a centering component to drive multiple tapered positioning pins to move synchronously, thereby achieving automatic positioning of metal sheets. The symmetrical force ensures that the sheet is uniformly guided to the center without shifting or twisting during the positioning process, ensuring that the center of the sheet is completely aligned with the center of the mold, laying a perfect foundation for subsequent uniform stretching and preventing wrinkling and tearing.

[0019] 2. This invention designs the tapered positioning pin to be tapered at a specific angle and fits into the V-groove on the sheet metal. This is an "adaptive" positioning method. Even if there are minor dimensional errors or burrs in the sheet metal during the early processing, the tapered surface can guide and accommodate them well, making it less prone to jamming. This ensures the smoothness of the automated production process, reduces downtime caused by positioning failures, and improves the stability and production efficiency of the equipment.

[0020] 3. This invention integrates an internal air chamber, flow channel, and exhaust hole into the mold core with an external air compressor. During positioning, low-pressure gas is introduced to form an air film, causing the sheet metal to "float" above the lower mold. The friction is almost zero, avoiding hard contact between the sheet metal and the mold, and effectively protecting the surface finish of the metal sheet and the mold.

[0021] 4. This invention intelligently switches the air path through a three-way control valve, which can blow air to form an air film during positioning, draw vacuum to adsorb the sheet material during stamping, and blow high-pressure gas to assist separation during demolding, thus realizing multiple functions at the same time.

[0022] 5. This invention effectively removes solid particulate matter by using a filter and adsorbs oil mist and moisture by using an activated carbon box, ensuring that the gas entering the mold is clean and dry. This guarantees the long-term stability and effectiveness of the air flotation and vacuum adsorption functions, protects the expensive mold, extends its service life, and reduces maintenance and replacement costs.

[0023] 6. This invention integrates a gravity sensing module and a negative pressure suction cup into a weighing plate. When picking up metal plates, it can sense the weight in real time and feed the signal back to the air compressor to adjust and generate the most suitable air buoyancy pressure. According to the different weights and specifications of the plates, it automatically provides just the right amount of air buoyancy force, which not only ensures that the plates can float for easy positioning, but also avoids instability of the plates due to excessive buoyancy, thus realizing the intelligence and self-adaptation of the production process. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 is a schematic diagram of the frame structure of the present invention.

[0026] Figure 3 is a schematic diagram of the cross-sectional structure of the frame of the present invention.

[0027] Figure 4 is a schematic diagram of the lower worktable structure of the present invention.

[0028] Figure 5 is a schematic diagram of the pipeline grading component structure of the present invention.

[0029] Figure 6 is a schematic diagram of the mold core structure of the present invention.

[0030] Figure 7 is a three-dimensional structural diagram of the lower mold of the present invention.

[0031] Figure 8 is a schematic diagram of the cross-sectional structure of the lower mold of the present invention.

[0032] Figure 9 is a schematic diagram of the centering component structure of the present invention.

[0033] Figure 10 is a schematic diagram of the feeding assembly structure of the present invention.

[0034] Figure 11 is a schematic diagram of the swing component structure of the present invention.

[0035] Figure 12 is a schematic diagram of the structure of the metal plate of the present invention.

[0036] The attached diagram is labeled as follows: 1. Frame; 2. Main oil tank; 301. First hydraulic cylinder; 302. First piston; 303. Upper worktable; 4. Upper mold; 5. Guide rod; 601. Second hydraulic cylinder; 602. Second piston; 7. Lower mold; 701. Slide groove; 8. Lower worktable; 9. Slide rod; 10. Mold core; 1001. Air chamber; 1002. Gas flow channel; 1003. Exhaust port; 1101. First electric push rod; 1102. Double rack; 1103. Gear; 1104. Irregular rack rod; 12 1501. Conical locating pin; 1502. Air compressor; 1503. Vacuum pump; 1504. Air pressurization pipe; 1505. Three-way control valve; 1506. Vacuum extraction pipe; 1507. Main delivery pipe; 1508. Filter; 1509. Activated carbon box; 15000. Temporary storage platform; 15000. Mounting housing; 20001. Stepper motor; 2001. Disc; 2002. Eccentric cylinder; 2003. Swing arm; 2004. Drive arm; 2005. Cantilever; 2006. Second electric push rod; 2007. Weighing plate; 2008. Negative pressure suction cup; 2009. Limiting slide rail. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Referring to Figures 1 to 12 in the specification, a hydraulic device for positioning and feeding high-strength metal plates includes a frame 1 and a main oil tank 2 fixedly connected to the frame 1. An upper pressing assembly and a lower worktable 8 are mounted on the frame 1. The output end of the upper pressing assembly is connected to an upper mold 4. A return assembly is mounted on the bottom of the lower worktable 8, and the output end of the return assembly is connected to a lower mold 7. The upper pressing assembly drives the upper mold 4 to move closer to or further away from the lower mold 7, and the return assembly drives the lower mold 7 to move vertically. Several guide rods 5 are connected between the upper pressing assembly and the frame 1. The lower worktable 8 is fixedly connected to... There are several sliding rods 9, which are slidably connected to the lower mold 7. The lower mold 7 has a mold core 10 at its center, which is fixedly connected to the lower worktable 8. Several sliding grooves 701 are opened on the lower mold 7. A centering component is installed inside the lower mold 7. Several tapered positioning pins 12 are connected to the output end of the centering component. The tapered positioning pins 12 are slidably connected to the sliding grooves 701. The centering component is used to drive the tapered positioning pins 12 to move along the sliding grooves 701. The mold core 10 has an air chamber 1001, several gas flow channels 1002 and several exhaust holes 1003 opened sequentially from bottom to top.

[0039] It should be noted that the frame 1 is made of high-strength steel plate welded into a "four-column" structure, which integrates the main oil tank 2 and the hydraulic pipeline connected to the main oil tank 2. The main oil tank 2 has built-in filters, oil level gauges, air filters and other accessories to ensure the cleanliness of the hydraulic oil and provide stable pressure to the downward pressing component and the rebound component. The upper mold 4, lower mold 7 and mold core 10 are all detachable and can be fixed by bolts. In actual application, they can be replaced according to the size and model of the product being produced. The air chamber 1001, several gas flow channels 1002 and several exhaust holes 1003 inside the mold core 10 are connected in sequence. The inner diameter of the exhaust hole 1003 is smaller than that of the gas flow channel 1002. It is located on the upper surface of the mold core 10 and only allows airflow to pass through.

[0040] It is worth noting that the metal sheet is circular. Based on the principle that three points determine a circle, three 120° circular grooves 701 are distributed on the lower mold 7 to evenly support and position the metal sheet from three directions, providing extremely high rigidity and stability. Their size is also compatible with the conical positioning pins 12, providing a movement track for the pins. Then, a centering assembly drives multiple conical positioning pins 12 to move synchronously, ensuring precise alignment between the center of the metal sheet and the center of the lower mold 7. Simultaneously, before the metal sheet undergoes hydraulic stretching, a V-groove is typically stamped on the edge of the sheet, located in the low-stress area. This stamping equipment and the hydraulic equipment are on the same conveyor line for continuous conveying, minimizing the positional deviation between the V-groove on the sheet and the conical positioning pins 12 on the mold, achieving coarse positioning. Furthermore, while the V-groove is relatively small, its opening width is greater than the diameter of the positioning pin plus... The maximum offset is twice that of the standard offset, with an angle typically of 90°. When it engages with the 60° cone angle of the tapered locating pin 12, it forms a good line contact, ensuring accurate positioning and easy disengagement. It serves only a positioning function, and its size is much smaller than the overall size of the workpiece, so it will not have a substantial impact on the structural rigidity and fatigue life of the workpiece. As a measurement benchmark in the production process, it forms a unified benchmark from manufacturing to inspection. Moreover, both the V-groove on the metal plate and the tapered locating pin 12 have guiding slopes. Even if there is a certain deviation, the downward pressure under the action of the slope will generate a horizontal component force. This horizontal component force will push the metal plate to move slightly until the cone surface of the tapered locating pin 12 and the slope of the V-groove are completely in contact, making the positioning of the metal plate more accurate. After the hydraulic pressure is completed, this V-groove is cut off along with the excess waste in the final process, leaving no trace on the finished metal plate.

[0041] Referring to Figure 3 in the instruction manual, the pressing assembly includes a first hydraulic cylinder 301 fixedly connected to the frame 1, a first piston 302 slidably connected at one end to the first hydraulic cylinder 301, and an upper worktable 303 fixedly connected to the other end of the first piston 302. The first hydraulic cylinder 301 is connected to the main oil tank 2 through a pipe. The upper worktable 303 is fixedly connected to several guide rods 5. The guide rods 5 are slidably connected to the frame 1. When hydraulic oil flows between the main oil tank 2 and the first hydraulic cylinder 301, the first piston 302 drives the upper worktable 303 to move in the vertical direction.

[0042] It should be noted that the first hydraulic cylinder 301 is fixed upside down on the top crossbeam of the frame 1 by a flange and bolts, with the bottom of the cylinder facing up and the first piston 302 extending downwards. The first hydraulic cylinder 301 is provided with two oil ports for oil inlet and outlet, which are connected to the main oil tank 2 through high-pressure pipelines to realize the movement process of the first piston 302. The first piston 302 is provided with multiple seals to prevent high-pressure oil from leaking between the first piston 302 and the cylinder wall.

[0043] Referring to Figure 4 in the instruction manual, the lifting assembly includes a second hydraulic cylinder 601 fixedly connected to the lower worktable 8 and a second piston 602 slidably connected at one end inside the second hydraulic cylinder 601. The second hydraulic cylinder 601 is connected to the main oil tank 2 through a pipe, and the other end of the second piston 602 is fixedly connected to the lower mold 7. When hydraulic oil flows between the main oil tank 2 and the second hydraulic cylinder 601, the second piston 602 drives the lower mold 7 to move in the vertical direction.

[0044] It should be noted that the second hydraulic cylinder 601 is bolted to the lower worktable 8 and has only one oil port for oil inlet and outlet. It rises by oil pressure and falls by its own weight. It is connected to the main oil tank 2 through a high-pressure pipeline to realize the movement of the second piston 602. The second piston 602 is equipped with multiple seals to prevent high-pressure oil from leaking between the second piston 602 and the cylinder wall.

[0045] Referring to Figure 9 in the specification, the centering assembly includes a first electric push rod 1101 fixedly connected to the lower mold 7, a double rack 1102 fixedly connected at one end to the output end of the first electric push rod 1101, two gears 1103 rotatably connected to the lower mold 7, and two irregular rack rods 1104 with one end respectively meshing with the corresponding gears 1103. The double rack 1102 is meshed with the two gears 1103. The other end of the double rack 1102 and the other end of the irregular rack rods 1104 are fixedly connected to the conical positioning pins 12. The first electric push rod 1101 is used to drive the double rack 1102 to move in a preset direction. When the double rack 1102 moves, the conical positioning pins 12 move closer to or further away from the mold core 10.

[0046] It should be noted that the first electric push rod 1101 is installed on the lower mold 7, and drives the conical positioning pin 12 to move through the double rack 1102, gear 1103 and special-shaped rack rod 1104. The double rack 1102 is a rigid rod with teeth machined on both sides. The module and tooth shape of the teeth on both sides are exactly the same and symmetrical. At the same time, two identical gears 1103 mesh on both sides, converting the linear motion of the double rack 1102 into the synchronous reverse rotational motion of the two gears 1103. At the same time, the rotational motion of the two gears 1103 is converted into linear motion by the two special-shaped rack rods 1104. The two special-shaped rack rods 1104 are exactly the same and symmetrically distributed, ensuring that the movement time and displacement of all connected conical positioning pins 12 are completely consistent.

[0047] Referring to Figure 5 in the instruction manual, an air compressor 13 and a vacuum pump 14 are fixedly connected to the frame 1. Both the output ends of the air compressor 13 and the vacuum pump 14 are equipped with pipe connection assemblies. The output ends of the pipe connection assemblies are connected to a filter 16. An activated carbon box 17 is fixedly connected to the filter 16. The activated carbon box 17 is connected to the air chamber 1001 through a pipe.

[0048] It should be noted that the air compressor 13 injects gas into the gas chamber 1001 through the pipeline connection assembly, and blows it out through the gas flow channel 1002 and the exhaust port 1003. When positioning the metal sheet, low-pressure gas is injected, and by utilizing the principle of fluid mechanics, an air film is generated between the lower mold 7 and the metal sheet, which greatly reduces the friction between the lower mold 7 and the metal sheet, making positioning easier. When demolding the metal sheet or during the gap between loading and unloading, high-pressure gas is injected to assist demolding and clean the mold. After positioning, during the stretching stage, the vacuum pump 14 generates negative pressure and continuously evacuates the vacuum to ensure that the sheet can be tightly bonded and formed, avoiding the formation of "air cushions" due to trapped air, which would result in insufficient forming of the metal sheet or surface defects.

[0049] Referring to Figure 5 in the specification, the pipeline connection assembly includes a three-way control valve 1502 fixedly connected to the frame 1, an air pressurization pipe 1501 fixedly connected between the three-way control valve 1502 and the air compressor 13, a vacuum extraction pipe 1503 fixedly connected between the three-way control valve 1502 and the vacuum pump 14, and a main delivery pipe 1504 fixedly connected between the three-way control valve 1502 and the filter 16.

[0050] The three-way control valve 1502 is used to control the connection between the air pressurization pipe 1501 and the main delivery pipe 1504, or to control the connection between the vacuum extraction pipe 1503 and the main delivery pipe 1504.

[0051] It should be noted that the three-way control valve 1502 is a two-position three-way solenoid valve with two working positions and three ports. When the air compressor 13 is working, the air pressurization pipe 1501, the three-way control valve 1502 and the main delivery pipe 1504 are connected, and the vacuum extraction pipe 1503 is closed. When the vacuum pump 14 is working, the vacuum extraction pipe 1503, the three-way control valve 1502 and the main delivery pipe 1504 are connected, and the air pressurization pipe 1501 is closed. The pipelines are well sealed to ensure stable operation.

[0052] Referring to Figure 10 in the instruction manual, a temporary storage platform 18 is provided between adjacent racks 1. A mounting housing 19 is provided on one side of the temporary storage platform 18. A swing assembly is installed inside the mounting housing 19. The output end of the swing assembly is connected to a drive arm 21. The swing assembly is used to drive the drive arm 21 to move in a preset direction. Several cantilever arms 22 are fixedly connected to the drive arm 21.

[0053] It should be noted that the drive arm 21, as the direct bearer of the swing component output, is the main beam connecting the output source and the cantilever 22. It is a square steel pipe with excellent rigidity. The working radius of the drive arm 21 covers both the loading center of the temporary storage platform 18 and the loading center of the lower mold 7. When loading, it adopts a "one in, one out" method. One is responsible for taking the blank from the temporary storage platform 18 and sending it into the mold, while the other is responsible for taking the finished product from the mold and putting it back into the temporary storage platform 18. Loading and unloading are completed simultaneously within one swing cycle.

[0054] Another embodiment based on cantilever 22: Several cantilever 22s that are bolted to drive arm 21 are improved into a single, inseparable part where drive arm 21 and cantilever 22 are merged into one integral part, cast as a whole. This eliminates the connection interface, making it a continuous whole. Force flow is smoother, and there are no stress concentration connection points. Its torsional stiffness and bending stiffness are much higher than those of the split structure, which can effectively suppress vibration and deformation.

[0055] Referring to Figure 11 in the specification, the swing assembly includes a stepper motor 2001 fixedly connected to the mounting housing 19, a disk 2002 fixedly connected to the output end of the stepper motor 2001 via a shaft, an eccentric cylinder 2003 fixedly connected to the disk 2002 at one end, and a swing arm 2004 rotatably connected to the mounting housing 19 at one end. The other end of the swing arm 2004 is rotatably connected to the drive arm 21, and the other end of the eccentric cylinder 2003 is slidably connected to the limiting groove of the swing arm 2004. The stepper motor 2001 is used to drive the disk 2002 to rotate.

[0056] It should be noted that by using an external PLC control system to send a specific number of pulses to the stepper motor 2001, the stepper motor 2001 can achieve precise open-loop position control, thereby precisely controlling the rotation angle and stop position of the disk 2002 and the eccentric cylinder 2003. The center of the eccentric cylinder 2003 is not installed on the rotation center of the disk 2002, but has an eccentricity. The size of this eccentricity meets the total swing angle required by the drive arm 21. At the same time, a long strip-shaped limiting groove is opened on the swing arm 2004, and the size of the limiting groove is adapted to the eccentric cylinder 2003, limiting the sliding range of the eccentric cylinder 2003 inside it.

[0057] Referring to Figure 11 in the instruction manual, two symmetrical second electric push rods 23 are fixedly connected to the cantilever 22. The output end of the second electric push rod 23 is fixedly connected to the weighing plate 24. The second electric push rod 23 is used to drive the weighing plate 24 to move in a preset direction.

[0058] It should be noted that the second electric push rod 23 is mounted on the cantilever 22 with the output direction facing downward, driving the weighing plate 24 to move vertically, which is used to place and pick up metal plates.

[0059] Referring to Figure 11 in the instruction manual, several negative pressure suction cups 25 are fixedly connected to the bottom of the weighing plate 24. The weighing plate 24 has a built-in gravity sensing module. The gravity sensing module detects the gravity value of the metal plate and transmits an electrical signal to the air compressor 13. A limit slide rail 26 is installed on the temporary storage platform 18, and the cantilever 22 is slidably connected to the limit slide rail 26.

[0060] It should be noted that the weighing plate 24 is equipped with a weight sensing module, which measures the weight through a spring weight sensor. When the negative pressure suction cup 25 picks up the metal plate, the weight of the metal plate will cause the spring in the weighing plate 24 to undergo elastic deformation. The deformation is proportional to the force. The sensor calculates and amplifies the deformation and converts it into an electrical signal, which is then transmitted to the air compressor 13 in real time through the PLC. Based on the weight of the metal plate, the air compressor 13 controls the air pressure to avoid the air buoyancy between the metal plate and the lower mold 7 being too large or too small, which would affect the positioning of the metal plate.

[0061] Working principle: After the equipment is started, the swing assembly inside the mounting housing 19 begins to work. The stepper motor 2001 receives the control signal and rotates precisely, driving the disc 2002 to rotate. This causes the eccentrically positioned cylinder 2003 on the disc 2002 to perform circular motion and slide within the limiting groove of the swing arm 2004. This, in turn, pushes the swing arm 2004 on the mounting housing 19 to reciprocate. The other end of the swing arm 2004 drives the drive arm 21 to swing along with it. This allows the cantilever 22 on the drive arm 21 to move above the temporary storage platform 18 under the precise guidance of the limiting slide rail 26. At this time, the second electric push rod 23 on the cantilever 22 is activated, pushing the weighing plate 24 downward. This causes the negative pressure suction cup 25 below the weighing plate 24 to contact and pick up the plate material. The gravity sensing module inside the weighing plate 24 detects the weight of the metal plate in real time and transmits the signal to the air compressor 13 through the PLC control system. The air compressor 13 generates a low-pressure airflow based on the weight of the metal plate. The airflow passes through the air pressurization pipe 1501, the three-way control valve 1502, the main delivery pipe 1504, the filter 16, and the activated carbon box 17 before being blown into the air chamber 1001 and out of the exhaust port 1003. This creates a uniform air film on the surface of the lower mold 7, generating buoyancy on the metal plate. At the same time, the drive arm 21 drives the cantilever 22 to accurately transfer the plate above the lower mold 7. The centering component inside the lower mold 7 is activated. Referring to Figure 9, the first electric push rod 1101 pushes the double rack 1102 to move linearly, driving the two first gears on both sides. 1103 rotates synchronously in opposite directions, thereby driving the two irregularly shaped rack rods 1104 to move linearly, ultimately driving all the conical positioning pins 12 to extend radially synchronously along the slide groove 701 of the lower mold 7. The three conical positioning pins 12 correspond one-to-one with the three pre-made V-grooves on the edge of the metal plate, and the V-grooves of the metal plate are evenly distributed in a circular pattern, consistent with the distribution spacing of the conical positioning pins 12. At the same time, the side slope of the pressed V-grooves is consistent with the cone angle of the conical positioning pins 12, completing the precise centering of the metal plate. Then, the vacuum pump 14 on the frame 1 is started, the air compressor 13 is turned off, and the airflow passes through the vacuum extraction pipe 1503, is switched by the three-way control valve 1502, and then passes through the main delivery pipe 1504, the filter 16, and the activated carbon box 17. After purification, air enters the air chamber 1001 of the mold core 10, and air is drawn out through the gas flow channel 1002 and the exhaust port 1003, creating a negative pressure under the sheet metal, causing it to adhere tightly to the surface of the mold core 10, assisting in positioning and eliminating air cushions. After positioning, the first hydraulic cylinder 301 of the upper pressing assembly, driven by hydraulic oil, pushes the first piston 302 and the upper worktable 303 downward, driving the upper mold 4 to stamp the sheet metal. During this process, the second hydraulic cylinder 601 of the recovery assembly at the bottom of the lower worktable 8 provides controllable blank holder force, and its second piston 602 presses against the lower mold 7 by hydraulic oil pressure and is guided by the slide rod 9 to ensure smooth movement. After stamping is completed, the upper pressing assembly returns, the vacuum pump 14 stops running, and the air compressor 13 starts.The generated high-pressure gas, after passing through the air pressurization pipe 1501, three-way control valve 1502, main delivery pipe 1504, filter 16, and activated carbon box 17, is blown into the air chamber 1001 and out through the exhaust port 1003, assisting in demolding. Simultaneously, the lifting assembly activates, lifting the lower mold 7 to remove the metal sheet. Finally, the swing assembly drives the cantilever 22 to descend again, and the negative pressure suction cup 25 picks up the formed metal sheet and returns it to the temporary storage table 18, completing one work cycle.

[0062] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A hydraulic press for positioning and feeding high-strength metal sheet components, characterized in that: The machine includes a frame (1) and a main oil tank (2) fixedly connected to the frame (1). An upper pressing assembly and a lower worktable (8) are installed on the frame (1). The output end of the upper pressing assembly is connected to an upper mold (4). A recovery assembly is installed at the bottom of the lower worktable (8). The output end of the recovery assembly is connected to a lower mold (7). The upper pressing assembly is used to drive the upper mold (4) to move closer to or away from the lower mold (7). The recovery assembly is used to drive the lower mold (7) to move vertically. Several guide rods (5) are connected between the upper pressing assembly and the frame (1). Several sliding rods (9) are fixedly connected to the lower worktable (8). The lower mold (7) is slidably connected to the mold core (10) at its center. The mold core (10) is fixedly connected to the lower worktable (8). Several grooves (701) are provided on the lower mold (7). A centering component is installed inside the lower mold (7). Several tapered positioning pins (12) are connected to the output end of the centering component. The tapered positioning pins (12) and the grooves (701) are slidably connected. The centering component is used to drive the tapered positioning pins (12) to move along the grooves (701). An air chamber (1001) and several gas flow channels (1002) are sequentially provided inside the mold core (10) from bottom to top. And several exhaust ports (1003), an air compressor (13) and a vacuum pump (14) are fixedly connected on the frame (1), and the output ends of the air compressor (13) and the vacuum pump (14) are both equipped with pipe connection assemblies. The output end of the pipe connection assembly is connected to a filter (16), and an activated carbon box (17) is fixedly connected to the filter (16). The activated carbon box (17) is connected to the air chamber (1001) through a pipe; the centering assembly includes a first electric push rod (1101) fixedly connected to the lower mold (7), and a double rack (11) fixedly connected to the output end of the first electric push rod (1101) at one end. 02) Two gears (1103) are rotatably connected to the lower mold (7) and two irregular rack rods (1104) with one end meshing with the corresponding gears (1103). The double rack (1102) is meshed with the two gears (1103). The other end of the double rack (1102) and the other end of the irregular rack rod (1104) are fixedly connected to the conical positioning pin (12). The first electric push rod (1101) is used to drive the double rack (1102) to move in a preset direction. When the double rack (1102) moves, the conical positioning pin (12) moves closer to or further away from the mold core (10).The piping connection assembly includes a three-way control valve (1502) fixedly connected to the frame (1), an air pressurization pipe (1501) fixedly connected between the three-way control valve (1502) and the air compressor (13), a vacuum extraction pipe (1503) fixedly connected between the three-way control valve (1502) and the vacuum pump (14), and a main delivery pipe (1504) fixedly connected between the three-way control valve (1502) and the filter (16). The three-way control valve (1502) is used to control the connection between the air pressurization pipe (1501) and the main delivery pipe (1504), or to control the connection between the vacuum extraction pipe (1503) and the main delivery pipe (1504).

2. The hydraulic equipment for high-strength metal sheet material with positioning and feeding capability according to claim 1, characterized in that: The pressing assembly includes a first hydraulic cylinder (301) fixedly connected in the frame (1), a first piston (302) slidably connected in the first hydraulic cylinder (301) at one end, and an upper worktable (303) fixedly connected to the other end of the first piston (302). The first hydraulic cylinder (301) is connected to the main oil tank (2) through a pipe. The upper worktable (303) is fixedly connected to several guide rods (5). The guide rods (5) are slidably connected to the frame (1). When the hydraulic oil flows between the main oil tank (2) and the first hydraulic cylinder (301), the first piston (302) drives the upper worktable (303) to move in the vertical direction.

3. The hydraulic equipment for high-strength metal sheet material with positioning and feeding capability according to claim 1, characterized in that: The recovery assembly includes a second hydraulic cylinder (601) fixedly connected to the lower worktable (8) and a second piston (602) slidably connected at one end inside the second hydraulic cylinder (601). The second hydraulic cylinder (601) is connected to the main oil tank (2) through a pipe. The other end of the second piston (602) is fixedly connected to the lower mold (7). When hydraulic oil flows between the main oil tank (2) and the second hydraulic cylinder (601), the second piston (602) drives the lower mold (7) to move in the vertical direction.

4. The hydraulic equipment for high-strength metal sheet material with positioning and feeding capability according to claim 1, characterized in that: A temporary storage platform (18) is provided between adjacent racks (1). A mounting housing (19) is provided on one side of the temporary storage platform (18). A swing assembly is installed inside the mounting housing (19). The output end of the swing assembly is connected to a drive arm (21). The swing assembly is used to drive the drive arm (21) to move in a preset direction. Several cantilever arms (22) are fixedly connected to the drive arm (21).

5. The hydraulic equipment for high-strength metal sheet material with positioning and feeding capability according to claim 4, characterized in that: The swing assembly includes a stepper motor (2001) fixedly connected to the mounting housing (19), a disk (2002) fixedly connected to the output end of the stepper motor (2001) via a shaft, an eccentric cylinder (2003) fixedly connected to the disk (2002) at one end, and a swing arm (2004) rotatably connected to the mounting housing (19) at one end. The other end of the swing arm (2004) is rotatably connected to the drive arm (21), and the other end of the eccentric cylinder (2003) is slidably connected to the limiting groove of the swing arm (2004). The stepper motor (2001) is used to drive the disk (2002) to rotate.

6. The hydraulic equipment for high-strength metal sheet material with positioning and feeding capability according to claim 5, characterized in that: Two symmetrical second electric push rods (23) are fixedly connected to the cantilever (22). The output end of the second electric push rod (23) is fixedly connected to the weighing plate (24). The second electric push rod (23) is used to drive the weighing plate (24) to move in a preset direction.

7. A hydraulic press for high-strength metal sheet material with positioning and feeding capability according to claim 6, characterized in that: Several negative pressure suction cups (25) are fixedly connected below the weighing plate (24). The weighing plate (24) has a built-in gravity sensing module. The gravity sensing module detects the gravity value of the metal plate and transmits an electrical signal to the air compressor (13). A limit slide rail (26) is installed on the temporary storage platform (18). The cantilever (22) is slidably connected to the limit slide rail (26).

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