A high-efficiency automatic dry powder forming hydraulic press driven by a three-axis CNC bidirectional pump.

Abstract

This invention relates to an extruder, and more particularly to a high-efficiency automatic dry powder forming hydraulic press driven by a three-axis CNC bidirectional pump servo. The invention provides a high-efficiency automatic dry powder forming hydraulic press driven by a three-axis CNC bidirectional pump servo, comprising a cabinet, a table, a lower power assembly, and an upper power assembly. The table is bolted to the cabinet. The lower power assembly is mounted on the table and provides an upward thrust for dry powder forming. The upper power assembly is mounted on the upper part of the cabinet. The top cylinder of this invention is fixed with a flange, which is directly connected to the table, eliminating the need for large nuts for tightening. This results in a simple structure and easy disassembly. Furthermore, this invention indirectly transmits the extrusion thrust through air cushion blocks, allowing for a shorter stroke of the top cylinder, reducing the overall height of the equipment, and making the structure more compact.

Description

Technical Field

[0001] This invention relates to an extruder, and more particularly to a high-efficiency dry powder automatic forming hydraulic press driven by a three-axis CNC bidirectional pump servo. Background Technology

[0002] A hydraulic press (also known as an oil press) is a machine that uses the static pressure of a liquid as the working medium and is designed based on Pascal's principle to transfer energy to process materials such as metal, plastic, rubber, wood, and powder. Using a hydraulic press for powder forming is an advanced manufacturing technology that saves energy and reduces material usage.

[0003] Currently, when extruding powder, the powder is placed in a forming hole or container and extruded by a pressure column. In this method, pressure is applied to the powder only from top to bottom during the forming process, and the hydraulic cylinder applies force to the pressure column from a single point. If the powder area is slightly larger during the forming process, uneven force will occur. In addition, in order to protect the safety of the operators, the pressure column usually needs to rise to a very high height when unloading the material, making the whole equipment quite bulky.

[0004] In summary, the current dry powder forming method has the following disadvantages:

[0005] 1. When the powder forming area is relatively large, uneven stress is likely to occur, resulting in poor forming effect and reduced yield.

[0006] 2. The one-way pressure application method results in a tall overall height of the equipment, making it rather bulky. Summary of the Invention

[0007] To overcome the shortcomings of the aforementioned powder forming hydraulic presses, a high-efficiency dry powder automatic forming hydraulic press with a three-axis CNC bidirectional pump servo drive is provided to solve the above problems.

[0008] The technical implementation scheme of the present invention is as follows: a high-efficiency dry powder automatic forming hydraulic press driven by a three-axis CNC bidirectional pump servo, including a cabinet, a table, a lower power component, and an upper power component. The table is fixed to the cabinet by bolts. The lower power component is installed on the table and provides an upward pushing force for dry powder forming. The upper power component is installed on the upper part of the cabinet and provides a downward pushing force for dry powder forming. It also includes a middle power component, a material feeding and unloading component, and a micro-return air cushion structure. The middle power component is installed on the lower power component and provides more stable forming power for dry powder forming. The material feeding and unloading component is installed on the upper power component and is used to place the material before forming. The micro-return air cushion structure is installed on the material feeding and unloading component and is used to reduce the overall height of the equipment. The lower power component, middle power component, upper power component, material feeding and unloading component, and micro-return air cushion structure partially overlap in the vertical direction.

[0009] As a preferred embodiment of the present invention, the lower power assembly includes a flange, a top cylinder, a connecting plate I, and optical shafts I. The top cylinder is connected to the platform via the flange. Four optical shafts I are slidably and symmetrically arranged on the platform on both sides of the top cylinder. The top ends of the optical shafts I are fixedly connected to the connecting plate I. The output end of the top cylinder is connected to the connecting plate I. The top cylinder is used to push the connecting plate I to move vertically. The optical shafts I guide the connecting plate I.

[0010] As a preferred embodiment of the present invention, the central power assembly includes a central cylinder, optical shafts II, a lifting plate, a pusher block, and a connecting plate II. The central cylinder is fixedly connected to the middle of the connecting plate I. Four optical shafts II are symmetrically arranged on the connecting plate I. The lifting plate is slidably arranged between the upper parts of the optical shafts II. The pusher block is fixedly connected to the middle of the lifting plate. The lifting plate is connected to the output end of the central cylinder. The connecting plate II is fixedly connected between the top ends of the optical shafts II. A countersunk hole is opened in the middle of the connecting plate II. The countersunk hole coincides with the pusher block in the vertical direction.

[0011] As a preferred embodiment of the present invention, the upper power assembly includes a main cylinder, an optical axis III, a lower pressure plate, and an upper mold. The main cylinder is fixedly connected to the upper part of the cabinet. The optical axes III are symmetrically arranged on the cabinet. The lower pressure plate is slidably arranged between the optical axes III. The upper mold is fixedly connected to the lower side of the lower pressure plate. The upper mold can be disassembled.

[0012] As a preferred embodiment of the present invention, the material handling assembly includes an upper pressure plate, an L-shaped transition block, a ball-type slide rail I, a ball-type slider I, a concave block, a lower mold, and a locking block. The upper pressure plate is slidably disposed below the optical axis III. The L-shaped transition blocks are symmetrically disposed on the upper side of the upper pressure plate. A ball-type slide rail I is fixedly connected to each L-shaped transition block. The ball-type slide rail I is perpendicular to the upper pressure plate. A ball-type slider I is slidably disposed on the ball-type slide rail I. A concave block is fixedly connected to the ball-type slider I. The lower mold is placed on the upper pressure plate. Locking blocks are fixedly connected to both sides of the lower mold, and the locking blocks are locked inside the concave blocks.

[0013] As a preferred embodiment of the present invention, pin holes are required at the connection between the card block and the lower mold, and the card is positioned by a pin.

[0014] As a preferred technical solution of the present invention, the micro-return air cushion structure includes an air cushion block and a limiting block. A T-shaped groove is opened in the middle of the lower side of the upper pressure plate, and the air cushion block is slidably arranged in the T-shaped groove. Waist-shaped holes are symmetrically opened on the left and right sides of the lower side of the upper pressure plate, and the waist-shaped holes are connected to the T-shaped groove. The limiting block is slidably arranged in the T-shaped groove.

[0015] As a preferred embodiment of the present invention, the air cushion block has grooves on both sides, allowing the air cushion block to slide into the T-shaped groove for fixation. The limiting block has threaded holes, and the threaded holes on the limiting block partially overlap with the waist-shaped holes on the upper pressure plate in the vertical direction. The limiting block can be fixed by screwing a bolt through the waist-shaped hole into the threaded holes on the limiting block.

[0016] As a preferred embodiment of the present invention, the pushing assembly includes a pushing and ejecting cylinder, an adapter, a ball-type slide rail II, a ball-type slider II, and an adapter plate. The pushing and ejecting cylinder is fixedly connected to the rear side of the top of the upper pressure plate. A groove is opened in the middle of the rear side of the lower die. The adapter is slidably arranged in the groove. The output shaft of the pushing and ejecting cylinder is connected to the adapter. The ball-type slide rail II is installed on the cabinet behind the pushing and ejecting cylinder. The ball-type slider II is slidably arranged on the pushing and ejecting cylinder. The ball-type slider II is connected to the pushing and ejecting cylinder through the adapter plate.

[0017] As a preferred embodiment of the present invention, the adapter has space to float up and down within the slide groove.

[0018] The beneficial effects of the present invention are as follows: 1. The top cylinder of the present invention is fixed by a flange. The flange on the top cylinder is directly connected to the platform, and there is no need to use a large nut for locking. The structure is simple and easy to disassemble.

[0019] 2. This invention indirectly transmits the extrusion force through air cushion blocks, which allows for a shorter stroke of the top cylinder, reducing the overall height of the equipment and making the structure more compact.

[0020] 3. This invention increases the central thrust of the lower mold by pushing the pusher block against the center of the air cushion block, thereby improving the material forming effect. Furthermore, because the air cushion block itself has a certain degree of elasticity, when an upward thrust is applied to the lower mold, the thrust will not increase instantaneously, but will increase slowly. This not only helps protect the equipment, but also facilitates product forming. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the component used for molding according to the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the lower power assembly and the middle power assembly of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the upper power assembly and the material loading / unloading assembly of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the material feeding and dispensing assembly and the material pushing assembly of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the upper pressure plate, air cushion block, and limiting block of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the upper pressure plate of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the limiting block of the present invention.

[0029] Figure 9 This is a three-dimensional structural diagram of the air cushion block of the present invention.

[0030] Component names and serial numbers in the diagram: 1_Cabinet, 2_Tabletop, 3_Lower Power Component, 31_Flange, 32_Top Cylinder, 33_Connecting Plate I, 34_Optical Axis I, 4_Middle Power Component, 41_Central Cylinder, 42_Optical Axis II, 43_Lifting Plate, 44_Push Block, 45_Connecting Plate II, 46_Counterhole, 5_Upper Power Component, 51_Main Cylinder, 52_Optical Axis III, 53_Lower Pressure Plate, 54_Upper Mold, 6_Material Loading / Unloading Component 61_Upper pressure plate, 62_L-shaped adapter block, 63_Ball type slide rail I, 64_Ball type slider I, 65_Concave block, 66_Lower mold, 67_Card block, 7_Micro-return air cushion structure, 71_T-slot, 72_Oval hole, 73_Air cushion block, 74_Limit block, 8_Pushing assembly, 81_Pushing and ejecting cylinder, 82_Slide groove, 83_Adapter, 84_Ball type slide rail II, 85_Ball type slider II, 86_Adapter plate. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention. Example 1

[0032] A high-efficiency dry powder automatic forming hydraulic press driven by a three-axis CNC bidirectional pump, see [link / reference] Figures 1-9 The system includes a cabinet 1, a work surface 2, a lower power assembly 3, a middle power assembly 4, an upper power assembly 5, a material loading / unloading assembly 6, and a micro-return air cushion structure 7. The work surface 2 is bolted to the cabinet 1. The lower power assembly 3 is mounted on the work surface 2 and provides upward thrust for dry powder molding. The middle power assembly 4 is mounted on the lower power assembly 3 and provides more stable molding power for dry powder molding. The upper power assembly 5 is mounted on the upper part of the cabinet 1 and provides downward thrust for dry powder molding. The material loading / unloading assembly 6 is mounted on the upper power assembly 5 and is used to place materials before molding. The micro-return air cushion structure 7 is mounted on the material loading / unloading assembly 6 and is used to reduce the overall height of the equipment. The lower power assembly 3, middle power assembly 4, upper power assembly 5, material loading / unloading assembly 6, and micro-return air cushion structure 7 partially overlap in the vertical direction.

[0033] See Figure 3 The lower power assembly 3 includes a flange 31, a top cylinder 32, a connecting plate I 33, and optical shafts I 34. The top cylinder 32 is connected to the platform 2 via the flange 31. Four optical shafts I 34 are symmetrically arranged on the platform 2 on both sides of the top cylinder 32 via linear bearings. The top ends of the optical shafts I 34 are fixed to the connecting plate I 33 by bolts. The output end of the top cylinder 32 is connected to the connecting plate I 33 via a floating joint. The top cylinder 32 is used to push the connecting plate I 33 to move vertically. The optical shafts I 34 guide the connecting plate I 33.

[0034] See Figure 3 The central power assembly 4 includes a central cylinder 41, optical shafts II 42, a lifting plate 43, a pusher block 44, and a connecting plate II 45. The central cylinder 41 is fixed to the middle of the connecting plate I 33 by bolts. Four optical shafts II 42 are symmetrically arranged on the connecting plate I 33 by bolts. The lifting plate 43 is slidably arranged between the upper parts of the optical shafts II 42 by linear bearings. The pusher block 44 is fixed to the middle of the lifting plate 43 by bolts. The lifting plate 43 is connected to the output end of the central cylinder 41 by a floating joint. The top ends of the optical shafts II 42 are fixed to the connecting plate II 45 by bolts. The connecting plate II 45 has a countersunk hole 46 in the middle, which coincides with the pusher block 44 in the vertical direction.

[0035] See Figure 4 The upper power assembly 5 includes a main cylinder 51, an optical axis III 52, a lower pressure plate 53, and an upper mold 54. The main cylinder 51 is fixed to the upper part of the cabinet 1 by bolts. The optical axis III 52 is symmetrically arranged on the cabinet 1. The lower pressure plate 53 is slidably arranged between the optical axes III 52 by linear bearings. The lower side of the lower pressure plate 53 is fixed to the upper mold 54 by bolts. The upper mold 54 can be disassembled.

[0036] When using this device to form dry powder, the material is first placed on the feeding assembly 6. Simultaneously, the top cylinder 32 and the main cylinder 51 are extended. The top cylinder 32 moves the connecting plate I 33 and its components upwards, while the main cylinder 51 moves the lower pressure plate 53 and the upper mold 54 downwards. When the connecting plate II 45 moves upwards and contacts the feeding assembly 6, it pushes the feeding assembly 6 upwards. When the upper mold 54 contacts the feeding assembly 6, the material is extruded and formed. Simultaneously, the center cylinder 41 is extended, pushing the lifting plate 43 upwards, which in turn moves the push block 44 upwards. The push block 44 passes through the countersunk hole 46 and presses against the micro-return air cushion structure 7, applying forming pressure to the center of the feeding assembly 6, ensuring that the feeding assembly 6 is evenly stressed. To improve the molding effect, after the material is molded, the top cylinder 32, main cylinder 51 and center cylinder 41 are reset. The top cylinder 32 drives the connecting plate I 33 and the components on the connecting plate I 33 to reset. The main cylinder 51 drives the lower pressure plate 53 and the upper mold 54 to reset. The center cylinder 41 drives the lifting plate 43 and the push block 44 to reset and remove the molded material. Then the above operation is repeated to extrude the remaining material. The top cylinder 32 is fixed with a flange 31. The flange 31 on the top cylinder 32 is directly connected to the table 2 without the need for a large nut to lock it. The structure is simple and easy to disassemble. In addition, the electrical components of the equipment can be installed in the rear space of the cabinet 1 without the need for a separate electrical box. The integrated installation makes the transportation and use of the equipment more convenient. Example 2

[0037] Based on Example 1, see Figure 4 and Figure 5The material handling assembly 6 includes an upper pressure plate 61, an L-shaped transition block 62, a ball-type slide rail I 63, a ball-type slider I 64, a concave block 65, a lower mold 66, and a locking block 67. The upper pressure plate 61 is slidably mounted on the lower part of the optical axis III 52 via linear bearings. The L-shaped transition blocks 62 are symmetrically mounted on the upper side of the upper pressure plate 61 via bolts. Each L-shaped transition block 62 is fixed with a ball-type slide rail I 63 via bolts. The rail I 63 is perpendicular to the upper pressure plate 61. A ball-type slider I 64 is slidably mounted on the ball-type slide rail I 63. A concave block 65 is fixed to the ball-type slider I 64 by bolts. The lower mold 66 is placed on the upper pressure plate 61. A locking block 67 is fixed to both sides of the lower mold 66 by bolts. The locking block 67 is locked in the concave block 65. Pin holes are required at the connection between the locking block 67 and the lower mold 66, and the locking block is positioned by a pin.

[0038] Before placing the material, according to the material forming requirements, the lower mold 66 with the locking block 67 is placed on the upper side of the upper pressure plate 61, and the locking block 67 is locked in the concave block 65. At the same time, the corresponding upper mold 54 is replaced. Then, the lower mold 66 is pulled forward, the material to be formed is placed in the lower mold 66, and the lower mold 66 is pushed to the rear. Through the extrusion of the upper mold 54 and the lower mold 66, the material is extruded and formed. After the upper mold 54 and the lower mold 66 are reset, the lower mold 66 is pulled forward again to remove the formed material. Because the ball-type slider I 64 is installed on the side of the lower mold 66 and is locked with the locking block 67 through the concave block 65, the lower mold 66 can be quickly replaced. At the same time, the ball-type slider I 64 will not bear the vertical pressure of the top cylinder 32 and the main cylinder 51. The ball-type slider I 64 will not be damaged due to force, which improves the service life of the ball-type slider I 64 and the ball-type slide rail I 63.

[0039] See Figures 6-9 The micro-return air cushion structure 7 includes an air cushion block 73 and a limiting block 74, see [link / reference] Figure 7 The upper pressure plate 61 has a T-shaped groove 71 in the middle of its lower side surface, and symmetrical waist-shaped holes 72 are formed on the front left and right sides of the lower side surface of the upper pressure plate 61. The waist-shaped holes 72 communicate with the T-shaped groove 71, and an air cushion block 73 is slidably provided in the T-shaped groove 71. (See reference) Figure 8 The air cushion block 73 has grooves on both sides, allowing it to slide into the T-shaped groove 71 for fixation. The limiting block 74 is slidably disposed in the T-shaped groove 71. The limiting block 74 has threaded holes, which partially overlap with the waist-shaped hole 72 on the upper pressure plate 61 in the vertical direction. The limiting block 74 can be fixed by screwing a bolt through the waist-shaped hole 72 into the threaded hole on the limiting block 74.

[0040] During the extrusion molding process of the material by the upper die 54 and the lower die 66, the connecting plate II 45 pushes the air cushion block 73 upward, which in turn moves the upper pressure plate 61 and the lower die 66 upward to extrude the material. At the same time, the central cylinder 41 extends, causing the push block 44 to move upward and contact the center of the air cushion block 73. Because the force points of the connecting plate II 45 are the four corners supported by the optical axis II 42, the force in the middle of the lower die 66 is lower than that around the perimeter. Therefore, the push block 44 presses against the center of the air cushion block 73, increasing the thrust in the middle of the lower die 66 and improving the material molding effect. Furthermore, because the air cushion block 73 itself has a certain degree of elasticity, when an upward thrust is applied to the lower die 66, the thrust does not increase instantaneously but increases slowly. This not only helps protect the equipment but also... This also facilitates product molding. Furthermore, the air cushion itself has a certain height, allowing for a shorter stroke in the top cylinder 32, reducing the overall height of the equipment and making the structure more compact. After material molding and equipment reset, if it is necessary to replace the air cushion block 73, first unscrew the bolts used to fix the limiting block 74 and remove the limiting block 74. Simultaneously, slide the air cushion block 73 forward and replace it with a new air cushion block 73. Then, slide the limiting block 74 back into the T-slot 71. After the rear side of the limiting block 74 contacts the front side of the air cushion block 73, use bolts to fix the limiting block 74. The limiting block 74 limits the air cushion block 73, preventing displacement during extrusion and affecting the molding effect.

[0041] See Figure 5 The feeding assembly 8 includes a pushing and ejecting cylinder 81, an adapter 83, a ball-type slide rail II 84, a ball-type slider II 85, and an adapter plate 86. The pushing and ejecting cylinder 81 is fixed to the top rear side of the upper pressure plate 61 by bolts. A groove 82 is opened in the middle of the rear side of the lower mold 66. The adapter 83 is slidably arranged in the groove 82. The output shaft of the pushing and ejecting cylinder 81 is connected to the adapter 83 through a floating joint. The ball-type slide rail II 84 is installed on the cabinet 1 behind the pushing and ejecting cylinder 81. The ball-type slider II 85 is slidably arranged on the pushing and ejecting cylinder 81. The ball-type slider II 85 is connected to the pushing and ejecting cylinder 81 through the adapter plate 86.

[0042] When placing material into or removing the formed material from the lower die 66, the push-out cylinder 81 drives the lower die 66 forward to push it out for material feeding or removal. After feeding or removing the material, the push-out cylinder 81 drives the lower die 66 to move backward to reset, performing the extrusion molding operation. Because the lower die 66 and the push-out cylinder 81 are engaged by a slide groove 82 and an adapter 83, and the adapter 83 has vertical movement space within the slide groove 82, the push-out cylinder 81 will not be affected during the extrusion process of the lower die 66 and the upper die 54. Material feeding and removal are performed through the push-out cylinder 81, making the equipment safer to use.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency dry powder automatic forming hydraulic press driven by a three-axis CNC bidirectional pump servo, comprising a cabinet (1), a table (2), a lower power assembly (3), and an upper power assembly (5), wherein the table (2) is bolted to the cabinet (1), the lower power assembly (3) is mounted on the table (2), the lower power assembly (3) provides an upward pushing force for dry powder forming, and the upper power assembly (5) is mounted on the upper part of the cabinet (1), the upper power assembly (5) provides a downward pushing force for dry powder forming, characterized in that, It also includes a central power assembly (4), a material feeding assembly (6), a material pushing assembly (8), and a micro-return air cushion structure (7). The central power assembly (4) is installed on the lower power assembly (3). The central power assembly (4) provides more stable molding power for dry powder molding. The material feeding assembly (6) is installed on the upper power assembly (5). The material feeding assembly (6) is used to place the material before molding. The micro-return air cushion structure (7) is installed on the material feeding assembly (6). The micro-return air cushion structure (7) is used to reduce the overall height of the equipment. The lower power assembly (3), the central power assembly (4), the upper power assembly (5), the material feeding assembly (6), and the micro-return air cushion structure (7) partially overlap in the vertical direction. The upper power assembly (5) includes a main cylinder (51), an optical axis III (52), a lower pressure plate (53), and an upper mold (54). The main cylinder (51) is fixedly connected to the upper part of the cabinet (1). The optical axis III (52) is symmetrically arranged on the cabinet (1) from left to right. The lower pressure plate (53) is slidably arranged between the optical axes III (52). The upper mold (54) is fixedly connected to the lower side of the lower pressure plate (53). The upper mold (54) can be disassembled. The material handling assembly (6) includes an upper pressure plate (61), an L-shaped transition block (62), a ball-type slide rail I (63), a ball-type slider I (64), a concave block (65), a lower mold (66), and a locking block (67). The upper pressure plate (61) is slidably disposed on the lower part of the optical axis III (52). The L-shaped transition blocks (62) are symmetrically disposed on the upper side of the upper pressure plate (61). Each L-shaped transition block (62) is fixed with a ball-type... Slide rail I (63), the ball-type slide rail I (63) is perpendicular to the upper pressure plate (61), ball-type slider I (64) is slidably arranged on the ball-type slide rail I (63), a concave block (65) is fixedly connected to the ball-type slider I (64), the lower mold (66) is placed on the upper pressure plate (61), and there are locking blocks (67) fixed on both the left and right sides of the lower mold (66), and the locking blocks (67) are locked in the concave block (65); The push assembly (8) includes a push-out cylinder (81), an adapter (83), a ball-type slide rail II (84), a ball-type slider II (85), and an adapter plate (86). The push-out cylinder (81) is fixed to the top rear side of the upper pressure plate (61). A slide groove (82) is opened in the middle of the rear side of the lower mold (66). The adapter (83) is slidably arranged in the slide groove (82). The output shaft of the push-out cylinder (81) is connected to the adapter (83). The ball-type slide rail II (84) is installed on the cabinet (1) on the rear side of the push-out cylinder (81). The ball-type slider II (85) is slidably arranged on the ball-type slide rail II (84). The ball-type slider II (85) is connected to the push-out cylinder (81) through the adapter plate (86). The adapter (83) has space to move up and down within the groove (82).

2. The high-efficiency dry powder automatic forming hydraulic press with three-axis CNC bidirectional pump servo drive according to claim 1, characterized in that, The lower power assembly (3) includes a flange (31), a top cylinder (32), a connecting plate I (33), and an optical axis I (34). The top cylinder (32) is connected to the platform (2) via the flange (31). Four optical axes I (34) are slidably arranged on the platform (2) on both sides of the top cylinder (32). The top ends of the optical axes I (34) are fixedly connected to the connecting plate I (33). The output end of the top cylinder (32) is connected to the connecting plate I (33). The top cylinder (32) is used to push the connecting plate I (33) to move vertically. The optical axis I (34) guides the connecting plate I (33).

3. A high-efficiency dry powder automatic forming hydraulic press with three-axis CNC bidirectional pump servo drive as described in claim 2, characterized in that, The central power assembly (4) includes a central cylinder (41), optical axis II (42), lifting plate (43), push block (44) and connecting plate II (45). The central cylinder (41) is fixed to the middle of the connecting plate I (33). Four optical axes II (42) are symmetrically arranged on the connecting plate I (33). The lifting plate (43) is slidably arranged between the upper parts of the optical axes II (42). The push block (44) is fixedly connected to the middle of the lifting plate (43). The lifting plate (43) is connected to the output end of the central cylinder (41). The top ends of the optical axes II (42) are fixedly connected to the connecting plate II (45). The connecting plate II (45) has a countersunk hole (46) in the middle. The countersunk hole (46) coincides with the push block (44) in the vertical direction.

4. A high-efficiency dry powder automatic forming hydraulic press with three-axis CNC bidirectional pump servo drive as described in claim 1, characterized in that, The connection between the card block (67) and the lower mold (66) requires the opening of pin holes, and the pins are used for positioning.

5. A high-efficiency dry powder automatic forming hydraulic press with three-axis CNC bidirectional pump servo drive according to claim 4, characterized in that, The micro-return air cushion structure (7) includes an air cushion block (73) and a limiting block (74). A T-shaped groove (71) is opened in the middle of the lower side of the upper pressure plate (61). The air cushion block (73) is slidably arranged in the T-shaped groove (71). Waist-shaped holes (72) are symmetrically opened on the front left and right sides of the lower side of the upper pressure plate (61). The waist-shaped holes (72) are connected to the T-shaped groove (71). The limiting block (74) is slidably arranged in the T-shaped groove (71).

6. A high-efficiency dry powder automatic forming hydraulic press with three-axis CNC bidirectional pump servo drive according to claim 5, characterized in that, The air cushion block (73) has grooves on both sides, allowing it to slide into the T-shaped groove (71) for fixation. The limiting block (74) has threaded holes, and the threaded holes on the limiting block (74) partially overlap with the waist-shaped hole (72) on the upper pressure plate (61) in the vertical direction. The limiting block (74) can be fixed by screwing a bolt through the waist-shaped hole (72) into the threaded hole on the limiting block (74).

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