Welding neck flange powder metallurgy forming die

Abstract

The invention provides a welding neck flange powder metallurgy forming die which comprises a rack assembly and a split type die base mechanism, and the rack assembly comprises a lower support, a side support and an upper support; wherein the side bracket is mounted on one side of the lower bracket; the bottom of the fixed mold base and the bottom of the movable mold base are blocked through the lower mold ejecting mechanism, so that a cavity for containing metal powder is formed in the fixed mold base and the movable mold base, the fixed mold base and the movable mold base can be preliminarily locked through the lower mold ejecting mechanism, and then the metal powder is put into the space between the fixed mold base and the movable mold base; secondly, the fixed die base and the movable die base are subjected to secondary locking through the upper die ejecting mechanism, displacement of the fixed die base and the movable die base in the pressing forming process is prevented, and then the upper die ejecting mechanism and the lower die ejecting mechanism are used for providing downward pressure and upward pressure for metal powder correspondingly; therefore, the metal powder can be rapidly formed in the cavity in a bidirectional extrusion mode, the stress of the metal powder is more uniform, and the quality after forming is guaranteed.

Description

Technical Field

[0001] The present invention relates to a powder metallurgy forming die, specifically a powder metallurgy forming die for high-neck flanges, and belongs to the technical field of powder metallurgy. Background Art

[0002] Powder metallurgy is a technology for manufacturing metal parts using metal powders or other powder materials, mainly including pressing and sintering processes, and can produce parts with complex shapes and precise dimensions; powder metallurgy dies are one of the important components in the powder metallurgy process, mainly processing metal powders into blank shapes by pressing in cooperation with the die, which determines the geometric shape and size of the final product.

[0003] Currently, most powder metallurgy dies adopt an up-and-down opening and closing design, which has the characteristics of rapid mold opening, closing, and demolding when processing parts such as gears, bearings, gear rings, and flange plates. However, when processing high-neck flanges, since the high-neck flange has a relatively long neck based on the traditional flange plate, when using an up-and-down opening and closing powder metallurgy die for pressing, it is necessary to increase the pressing and demolding strokes of the die according to the length of the neck, and the demolding difficulty is relatively high. Moreover, the one-way pressing method from top to bottom easily causes uneven stress on the powder, affecting the quality of the formed high-neck flange.

[0004] A Chinese patent with the patent name "A Powder Metallurgy Gear Forming Die and Forming Process" (patent number ZL202410404880.2) discloses a powder metallurgy forming die technology. However, although this die can adjust the depth of the gear die cavity to quickly adjust the thickness and quality of the finished gear, its pressing method is the same as that of traditional powder metallurgy dies. Although it can adjust the thickness of the pressed workpiece, it cannot meet the requirements of the neck length of the high-neck flange.

[0005] A Chinese patent with the patent name "A Two-way Warm Extrusion Forming Die" (patent number ZL201610218264.3) discloses a two-way warm extrusion forming technology. However, although this die can ensure the density and pressing strength of metal powder metallurgy materials by adopting a two-way hot extrusion forming method, its die opening and closing method is still the same as that of traditional dies, and it cannot quickly demold the formed high-neck flange. Therefore, a powder metallurgy forming die for high-neck flanges is proposed. Summary of the Invention

[0006] In view of this, the present invention provides a powder metallurgy forming die for high-neck flanges to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0007] The technical solution of the embodiment of the present invention is implemented as follows: A powder metallurgy forming die for a high-neck flange includes a frame assembly and a split die base mechanism. The frame assembly includes a lower bracket, a side bracket, and an upper bracket. Among them, the side bracket is installed on one side of the lower bracket, the split die base mechanism is installed on the top of the side bracket, the upper bracket is installed on one side of the top of the split die base mechanism, a turnover unloading mechanism is installed on the inner side wall of the lower bracket, a lower top die mechanism is installed in the middle of the inner side wall of the turnover unloading mechanism, an upper top die mechanism is installed in the middle of the inner side wall of the upper bracket, and a die opening and closing drive mechanism is installed on one side of the split die base mechanism. Among them, the split die base mechanism includes a fixed die base and a movable die base, and the die opening and closing drive mechanism includes a third hydraulic cylinder. Among them, the fixed die base is installed on the upper surface of the side bracket, the movable die base is hinged to one side of the fixed die base, and the third hydraulic cylinder is arranged between the fixed die base and the movable die base for laterally opening the die in cooperation with the fixed die base and the movable die base. Among them, the lower top die mechanism and the upper top die mechanism are used to respectively perform primary and secondary locking on the fixed die base and the movable die base after die closing, and provide upward and downward pressures for the metal powder.

[0008] Further preferably, the split die base mechanism further includes an inner die cavity and a plurality of lower locking holes. Among them, the inner die cavity is opened on the adjacent side of the fixed die base and the movable die base, and a plurality of the lower locking holes are respectively opened at the bottom of the inner side walls of the fixed die base and the movable die base.

[0009] Further preferably, the upper top die mechanism includes a second hydraulic cylinder, a die casting frame, a spring, a sliding plate, a plurality of locking pins, and a plurality of upper locking holes. Among them, the second hydraulic cylinder is installed in the middle of the upper surface of the upper bracket, the bottom of the outer side wall of the die casting frame is slidably connected to the inner side wall of the inner die cavity, the top of the die casting frame is fixedly connected to the piston rod of the second hydraulic cylinder, the sliding plate is slidably connected to the outer side wall of the die casting frame, the spring is fixedly connected between the die casting frame and the sliding plate, a plurality of the locking pins are fixedly connected to the bottom of the lower bracket, a plurality of the upper locking holes are respectively opened on the upper surfaces of the fixed die base and the movable die base, and the outer side wall of the locking pin is slidably connected to the inner side wall of the upper locking hole.

[0010] Further preferably, the turnover unloading mechanism includes a reduction motor, a turnover plate frame, and an installation groove. Among them, the reduction motor is installed on one side of the lower bracket, one end of the turnover plate frame is fixedly connected to the output shaft of the reduction motor, the other end of the turnover plate frame is rotatably connected to the inner side wall of the lower bracket, and the installation groove is opened in the middle of the lower surface of the turnover plate frame.

[0011] Further preferably, the lower top die mechanism includes a first hydraulic cylinder, an inner die core, and two guiding link rods; Wherein, the first hydraulic cylinder is installed on the inner side wall of the installation groove, one end of the first hydraulic cylinder penetrates through the inner side wall of the turning plate frame, the inner die core is installed at one end of the piston rod of the first hydraulic cylinder, the outer side walls of the two guiding link rods are slidably connected to the inner side wall of the turning plate frame, and the tops of the two guiding link rods are fixedly connected to the bottom of the inner die core.

[0012] Further preferably, the inner die core is composed of a die core plate, a plurality of die core pins, and die core columns; Wherein, the die core plate is fixedly connected to one end of the piston rod of the first hydraulic cylinder, the die core column is arranged in the middle of the upper surface of the die core plate, the inner side wall of the die casting frame is slidably connected to the outer side wall of the die core column, a plurality of the die core pins are annularly arranged on the upper surface of the die core plate, the outer side wall of the die core pin is slidably connected to the inner side wall of the lower locking hole, and the die core plate, the die core pins, and the die core columns are of an integrally formed structure and the material is breathable steel.

[0013] Further preferably, the mold opening and closing driving mechanism further includes a connecting frame and a connecting column; Wherein, the connecting frame is fixedly connected to one side of the moving die base, one end of the piston rod of the third hydraulic cylinder is hinged to the middle of the inner side wall of the connecting frame, the connecting column is fixedly connected to one side of the inner side wall of the fixed die base, and the other end of the third hydraulic cylinder is hinged to the middle of the outer side wall of the connecting column.

[0014] Further preferably, a powder conveying mechanism is installed on one side of the fixed die base, and the powder conveying mechanism includes a storage tank, a feeding pipe, a driving motor, and a dragon blade; Wherein, the storage tank is fixedly connected to one side of the upper surface of the fixed die base, the feeding pipe is fixedly connected to the top of the inner side wall of the fixed die base, one end of the feeding pipe is communicated with the inner die cavity, the driving motor is installed at the other end of the feeding pipe, the bottom of the storage tank is communicated with the top of the outer side wall of the feeding pipe, the output shaft of the driving motor penetrates through the inner side wall of the feeding pipe, and one end of the dragon blade is fixedly connected to the output shaft of the driving motor.

[0015] Further preferably, level sensors are installed on the top of the inner side walls of the fixed die base and the moving die base, a light-transmitting sheet is arranged on one side of the level sensor, an electric control box is installed on one side of the lower support, a central controller is installed in the middle of the inner side wall of the electric control box, and a relay is installed at the bottom of the inner side wall of the electric control box.

[0016] Further preferably, a cover plate is hinged to one side of the upper surface of the storage bin, a side support plate is fixedly connected to one side of the side bracket, and the bottom of the moving die base is slidably connected to the upper surface of the side support plate.

[0017] Due to the adoption of the above technical solutions in the embodiments of the present invention, it has the following advantages: First, the present invention uses the lower top die mechanism to block the bottoms of the fixed die base and the moving die base, forming a cavity for accommodating metal powder inside, and can use the lower top die mechanism to perform preliminary locking between the fixed die base and the moving die base. Then, the metal powder is put between the fixed die base and the moving die base, and then the upper top die mechanism is used to perform secondary locking between the fixed die base and the moving die base to prevent displacement of the fixed die base and the moving die base during the pressing and forming process. Then, the upper top die mechanism and the lower top die mechanism are used to provide downward and upward pressures for the metal powder respectively, so as to quickly form the metal powder in the cavity by means of two-way extrusion, and make its stress more uniform, ensuring the quality after forming.

[0018] Second, the present invention uses the lower top die mechanism and the upper top die mechanism to release the locking between the fixed die base and the moving die base, and then drives the moving die base to move by the third hydraulic cylinder for side mold opening operation. Then, the turning and unloading mechanism drives the whole lower top die mechanism to turn over, so as to take out the formed high-neck flange blank from the fixed die base and transfer it to the blanking area, improving the demolding and blanking efficiency.

[0019] The above summary is only for the purpose of the specification and is not limited in any way. In addition to the above-described illustrative aspects, embodiments and features, other aspects, embodiments and features of the present invention will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the structural diagram of the present invention; Figure 2 is the cross-sectional structural schematic diagram of the first perspective of the present invention; Figure 3 is the present invention Figure 2 is the enlarged schematic diagram of the structure of area A of the present invention; Figure 4 is the cross-sectional structural schematic diagram of the second perspective of the present invention; Figure 5Schematic cross-sectional structure diagram of the fixed mold base and moving mold base of the present invention; Figure 6 Axonometric view of the side bracket of the present invention; Figure 7 Axonometric view of the lower bracket of the present invention; Figure 8 Axonometric view of the fixed mold base of the present invention; Figure 9 Schematic cross-sectional structure diagram of the electric control box of the present invention.

[0022] Reference numerals: 1, frame assembly; 2, split mold base mechanism; 3, lower ejector mold mechanism; 4, upper ejector mold mechanism; 5, flipping and discharging mechanism; 6, powder conveying mechanism; 8, mold opening and closing drive mechanism; 101, lower bracket; 102, side bracket; 103, upper bracket; 201, fixed mold base; 202, moving mold base; 203, inner mold cavity; 204, lower locking hole; 301, first hydraulic cylinder; 302, inner mold core; 303, guiding connecting rod; 321, mold core plate; 322, mold core pin; 323, mold core column; 401, second hydraulic cylinder; 402, die casting frame; 403, spring; 404, sliding plate; 405, locking pin; 406, upper locking hole; 501, reduction motor; 502, flipping plate frame; 503, installation groove; 601, storage bin; 602, feeding pipe; 603, drive motor; 604, auger blade; 71, level sensor; 72, light-transmitting sheet; 73, electric control box; 74, central controller; 75, relay; 76, cover plate; 77, side support plate; 801, connecting frame; 802, third hydraulic cylinder; 803, connecting column. Detailed Description of the Invention

[0023] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0024] It should be noted that terms such as "first", "second", "symmetric", "array", etc. are only used for the purpose of distinguishing descriptions and position descriptions, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "symmetric", etc. can explicitly or implicitly include one or more of such features; similarly, when certain features are not limited in quantity by words such as "two", "three", etc., it should be noted that such features also belong to explicitly or implicitly including one or more feature quantities.

[0025] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0026] AsFigures 1-9 As shown in Figures 1-9 , an embodiment of the present invention provides a powder metallurgy forming die for a high-neck flange, which includes a frame assembly 1 and a split die base mechanism 2. The frame assembly 1 includes a lower bracket 101, side brackets 102, and an upper bracket 103. Among them, the side brackets 102 are installed on one side of the lower bracket 101, the split die base mechanism 2 is installed on the top of the side brackets 102, the upper bracket 103 is installed on one side of the top of the split die base mechanism 2. A turnover unloading mechanism 5 is installed on the inner side wall of the lower bracket 101, a lower top die mechanism 3 is installed in the middle of the inner side wall of the turnover unloading mechanism 5, an upper top die mechanism 4 is installed in the middle of the inner side wall of the upper bracket 103, and a mold opening and closing drive mechanism 8 is installed on one side of the split die base mechanism 2. Among them, the split die base mechanism 2 includes a fixed die base 201, a movable die base 202, an inner mold cavity 203, and a plurality of lower locking holes 204. The mold opening and closing drive mechanism 8 includes a connecting frame 801, a third hydraulic cylinder 802, and a connecting column 803. Among them, the fixed die base 201 is installed on the upper surface of the side brackets 102, the movable die base 202 is hinged to one side of the fixed die base 201, the third hydraulic cylinder 802 is arranged between the fixed die base 201 and the movable die base 202 and is used to cooperate with the fixed die base 201 and the movable die base 202 for lateral mold opening. The inner mold cavity 203 is opened on the adjacent side of the fixed die base 201 and the movable die base 202. A plurality of lower locking holes 204 are respectively opened at the bottom of the inner side walls of the fixed die base 201 and the movable die base 202. A side support plate 77 is fixedly connected to one side of the side brackets 102, and the bottom of the movable die base 202 is slidably connected to the upper surface of the side support plate 77. The connecting frame 801 is fixedly connected to one side of the movable die base 202. One end of the piston rod of the third hydraulic cylinder 802 is hinged to the middle of the inner side wall of the connecting frame 801, and the connecting column 803 is fixedly connected to one side of the inner side wall of the fixed die base 201. The other end of the third hydraulic cylinder 802 is hinged to the middle of the outer side wall of the connecting column 803. Among them, the lower top die mechanism 3 and the upper top die mechanism 4 are used to perform primary and secondary locking on the fixed die base 201 and the movable die base 202 after mold closing respectively, and provide upward and downward pressures for the metal powder.

[0027] In one embodiment, the upper top die mechanism 4 includes a second hydraulic cylinder 401, a die casting frame 402, a spring 403, a slide plate 404, a plurality of locking pins 405, and a plurality of upper locking holes 406. Among them, the second hydraulic cylinder 401 is installed in the middle of the upper surface of the upper support 103. The bottom of the outer side wall of the die-casting frame 402 is slidably connected to the inner side wall of the inner die cavity 203. The top of the die-casting frame 402 is fixedly connected to the piston rod of the second hydraulic cylinder 401. The slide plate 404 is slidably connected to the outer side wall of the die-casting frame 402. The spring 403 is fixedly connected between the die-casting frame 402 and the slide plate 404. A plurality of locking pins 405 are all fixedly connected to the bottom of the lower support 101. A plurality of upper locking holes 406 are respectively opened on the upper surfaces of the fixed die base 201 and the movable die base 202. The outer side wall of the locking pin 405 is slidably connected to the inner side wall of the upper locking hole 406.

[0028] The piston rod of the second hydraulic cylinder 401 drives the die-casting frame 402 to move. The moving die-casting frame 402 is inserted into the inner die cavity 203 and drives the slide plate 404 to move by means of the spring 403. Then, the moving slide plate 404 drives the locking pin 405 to be inserted into the upper locking hole 406 to lock the tops of the fixed die base 201 and the movable die base 202. Then, the die-casting frame 402 drives the spring 403 to be compressed so that the bottom of the die-casting frame 402 can be smoothly inserted into the inner die cavity 203.

[0029] In one embodiment, the flipping and discharging mechanism 5 includes a reduction motor 501, a flipping plate frame 502, and a mounting groove 503. Among them, the reduction motor 501 is installed on one side of the lower support 101. One end of the flipping plate frame 502 is fixedly connected to the output shaft of the reduction motor 501. The other end of the flipping plate frame 502 is rotatably connected to the inner side wall of the lower support 101. The mounting groove 503 is opened in the middle of the lower surface of the flipping plate frame 502.

[0030] The output shaft of the reduction motor 501 drives the flipping plate frame 502 to rotate. The rotating flipping plate frame 502 drives the first hydraulic cylinder 301 to move. The moving first hydraulic cylinder 301 drives the high-neck flange blank by means of the inner die core 302, so as to take out the high-neck flange blank from the fixed die base 201 and transfer it to the blanking area on one side of the mold by means of flipping.

[0031] In one embodiment, the lower top die mechanism 3 includes a first hydraulic cylinder 301, an inner die core 302, and two guiding link rods 303. Among them, the first hydraulic cylinder 301 is installed on the inner side wall of the mounting groove 503. One end of the first hydraulic cylinder 301 penetrates through the inner side wall of the flipping plate frame 502. The inner die core 302 is installed at one end of the piston rod of the first hydraulic cylinder 301. The outer side walls of the two guiding link rods 303 are both slidably connected to the inner side wall of the flipping plate frame 502. The tops of the two guiding link rods 303 are both fixedly connected to the bottom of the inner die core 302.

[0032] Drive the inner mold core 302 to move through the first hydraulic cylinder 301 so as to adjust the position of the inner mold core 302 according to actual requirements, and the bottom of the fixed mold base 201 and the moving mold base 202 can be sealed by the inner mold core 302, so as to form a cavity for accommodating metal powder between the fixed mold base 201 and the moving mold base 202.

[0033] In one embodiment, the inner mold core 302 is composed of a mold core plate 321, a plurality of mold core pins 322 and a mold core column 323; Among them, the mold core plate 321 is fixedly connected to one end of the piston rod of the first hydraulic cylinder 301. The mold core column 323 is arranged in the middle of the upper surface of the mold core plate 321. The inner side wall of the die casting frame 402 is slidably connected to the outer side wall of the mold core column 323. A plurality of mold core pins 322 are arranged in a circular arrangement on the upper surface of the mold core plate 321. The outer side wall of the mold core pin 322 is slidably connected to the inner side wall of the lower locking hole 204. The mold core plate 321, the mold core pins 322 and the mold core column 323 are integrally formed structures, and the material is breathable steel; By using the mold core plate 321, the mold core pins 322 and the mold core column 323 made of breathable steel, the air in the inner mold cavity 203 can be discharged during the pressing and forming process to prevent the air from interfering with the pressing and forming effect. By using the mold core plate 321 to drive the mold core pins 322 to insert into the lower locking hole 204, the fixed mold base 201 and the moving mold base 202 are locked.

[0034] In one embodiment, a powder conveying mechanism 6 is installed on one side of the fixed mold base 201. The powder conveying mechanism 6 includes a storage tank 601, a feeding pipe 602, a driving motor 603 and a dragonfly blade 604; Among them, the storage tank 601 is fixedly connected to one side of the upper surface of the fixed mold base 201. The feeding pipe 602 is fixedly connected to the top of the inner side wall of the fixed mold base 201. One end of the feeding pipe 602 is communicated with the inner mold cavity 203. The driving motor 603 is installed at the other end of the feeding pipe 602. The bottom of the storage tank 601 is communicated with the top of the outer side wall of the feeding pipe 602. The output shaft of the driving motor 603 penetrates the inner side wall of the feeding pipe 602. One end of the dragonfly blade 604 is fixedly connected to the output shaft of the driving motor 603. One side of the upper surface of the storage tank 601 is hinged with a cover plate 76.

[0035] Drive the dragonfly blade 604 to rotate through the output shaft of the driving motor 603. The rotating dragonfly blade 604 pushes the metal powder falling from the storage tank 601 into the feeding pipe 602 into the inner mold cavity 203 so as to fill the cavity with powder; the provided storage tank 601 is used to store the metal powder raw material and directly introduce it into the feeding pipe 602 under the action of gravity. The provided cover plate 76 is used to control the opening and closing of one side of the storage tank 601.

[0036] In one embodiment, level sensors 71 are installed at the top of the inner side walls of the fixed mold base 201 and the movable mold base 202. A light-transmitting sheet 72 is provided on one side of the level sensor 71. An electric control box 73 is installed on one side of the lower support 101. A central controller 74 is installed in the middle of the inner side wall of the electric control box 73. A relay 75 is installed at the bottom of the inner side wall of the electric control box 73.

[0037] By using the level sensor 71 to monitor the level data of the metal powder in the inner mold cavity 203, and using the central controller 74 to receive the data collected by the level sensor 71. When the level of the metal powder reaches the preset value, the central controller 74 controls the drive motor 603 through the relay 75 to control the amount of metal powder filled; the provided light-transmitting sheet 72 is used to protect the level sensor 71; the level sensor 71 is a laser level gauge or a radar level gauge.

[0038] When the present invention is working: First, the piston rod of the third hydraulic cylinder 802 drives the connecting frame 801 to move. The moving connecting frame 801 drives the movable mold base 202 to fit with one side of the fixed mold base 201 for mold closing operation.

[0039] After the mold closing is completed, the piston rod of the first hydraulic cylinder 301 drives the mold core plate 321 to perform a first action. The moving mold core plate 321 drives the mold core pin 322, the mold core column 323 and the guiding link 303 to move. The moving guiding link 303 guides the mold core plate 321 by sliding in the turning plate frame 502. The moving mold core pin 322 and the mold core column 323 respectively partially slide into the lower locking hole 204 and the inner mold cavity 203. The mold core pin 322 sliding into the lower locking hole 204 is used to perform a first locking between the fixed mold base 201 and the movable mold base 202. When the outer side wall part of the mold core plate 321 fits with the inner walls of the fixed mold base 201 and the movable mold base 202, the first action is completed, and a cavity for accommodating the metal powder is formed in the inner mold cavity 203.

[0040] After one action of the first hydraulic cylinder 301 is completed, the output shaft of the driving motor 603 drives the dragon piece 604 to rotate, and the rotating dragon piece 604 pushes the metal powder that falls from the storage box 601 into the feed pipe 602 into the inner mold cavity 203, so that the cavity can be filled with the powder, and then the material level of the metal powder in the inner mold cavity 203 is detected by the material level sensor 71, and the data detected by the material level sensor 71 is received by the central controller 74. When the detection data of the material level sensor 71 in the movable mold seat 202 is affected by the accumulation of metal powder, the filling is completed, and the driving motor 603 is turned off by the relay 75 through the central controller 74, and the driving motor 603 is started again to drive the dragon piece 604 to rotate in the opposite direction, so as to retract the metal powder close to the side of the inner mold cavity 203 into the feed pipe 602, so as to prevent the metal powder from continuously flowing out of the feed pipe 602 during the pressing or mold opening process.

[0041] When the metal powder is filled, the die-casting frame 402 is driven to move by the piston rod of the second hydraulic cylinder 401, and the moving die-casting frame 402 is inserted into the inner mold cavity 203 and the spring 403 is used to drive the slide plate 404 to move. When the moving slide plate 404 drives the locking pin 405 to be inserted into the upper locking hole 406, the fixed mold base 201 and the movable mold base 202 are locked for the second time through the slide plate 404, the locking pin 405 and the locking hole 406 to increase the stability of the fixed mold base 201 and the movable mold base 202, and prevent the fixed mold base 201 and the movable mold base 202 from positional deviation during the pressing process. When the movement of the locking pin 405 and the slide plate 404 is blocked, the moving die-casting frame 402 is locked by the moving die-casting frame 402. The frame 402 drives the spring 403 to be compressed, and the continuously moving die-casting frame 402 is used to provide downward pressure for the metal powder in the inner mold cavity 203, so that the extruded metal powder can be used to fully fill the cavity between the core plate 321, the fixed mold seat 201 and the movable mold seat 202 to prevent the occurrence of hollowing. After the action of the second hydraulic cylinder 401 is completed, the first hydraulic cylinder 301 is started again for a second action, and the piston rod of the first hydraulic cylinder 301 is used to push the inner mold core 302 to be completely inserted into the inner mold cavity 203, so as to provide upward pressure for the metal powder, so as to cooperate with the fixed mold seat 201 and the movable mold seat 202 to press the metal powder into a high-neck flange blank.

[0042] After the high-necked flange blank is formed by press molding, the die-casting frame 402 is driven by the second hydraulic cylinder 401 to reset as a whole, so as to release the lock on the top of the fixed die seat 201 and the movable die seat 202, and then the inner mold core 302 is driven by the piston rod of the first hydraulic cylinder 301 to move downward, so that the mold core pin 322 is separated from the lower locking hole 204, and the lock on the bottom of the fixed die seat 201 and the movable die seat 202 is released, and then the third hydraulic cylinder 802 uses the connecting frame 801 to drive the movable die seat 202 to move around one side of the fixed die seat 201 to perform the mold opening operation to expose the high-necked flange blank after press molding.

[0043] After the mold opening operation is completed, the output shaft of the deceleration motor 501 drives the turning plate frame 502 to rotate. The rotating turning plate frame 502 drives the first hydraulic cylinder 301 to move. The moving first hydraulic cylinder 301 drives the high-neck flange blank by means of the inner mold core 302, so as to take out the high-neck flange blank from the fixed mold base 201 and transfer it to the blanking area on one side of the mold by means of turning. Furthermore, the high-neck flange blank on the inner mold core 302 can be directly taken off to complete the blanking operation.

[0044] The side support plate 77 provided is used to provide a supporting force for the bottom of the moving mold base 202. The storage box 601 provided is used to store the metal powder raw material and directly introduce it into the material conveying pipe 602 under the action of gravity. The cover plate 76 provided is used to control the opening and closing of one side of the storage box 601 so as to supplement the metal powder raw material according to requirements.

[0045] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various changes or substitutions thereof, and these should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A powder metallurgy forming die for a high-neck flange, comprising a frame assembly (1) and a split die base mechanism (2), characterized in that: The frame assembly (1) comprises a lower bracket (101), a side bracket (102) and an upper bracket (103); The side bracket (102) is mounted on one side of the lower bracket (101), the split mold base mechanism (2) is mounted on the top of the side bracket (102), the upper bracket (103) is mounted on one side of the top of the split mold base mechanism (2), a turning unloading mechanism (5) is mounted on the inner side wall of the lower bracket (101), a lower top mold mechanism (3) is mounted in the middle of the inner side wall of the turning unloading mechanism (5), an upper top mold mechanism (4) is mounted in the middle of the inner side wall of the upper bracket (103), and a mold opening and closing drive mechanism (8) is mounted on one side of the split mold base mechanism (2); Wherein, the split mold base mechanism (2) comprises a fixed mold base (201) and a movable mold base (202), and the mold opening and closing drive mechanism (8) comprises a third hydraulic cylinder (802); The fixed die seat (201) is mounted on the upper surface of the side bracket (102), the movable die seat (202) is hinged to one side of the fixed die seat (201), and the third hydraulic cylinder (802) is arranged between the fixed die seat (201) and the movable die seat (202) and is used to cooperate with the fixed die seat (201) and the movable die seat (202) to perform lateral mold opening; The lower ejection mold mechanism (3) and the upper ejection mold mechanism (4) are used to respectively perform primary and secondary locking on the fixed mold base (201) and the movable mold base (202) after mold closing, and provide upward and downward pressure on the metal powder.

2. The powder metallurgy forming die for high-neck flange according to claim 1, characterized in that: The split mold base mechanism (2) further comprises an inner mold cavity (203) and a plurality of lower locking holes (204); The inner mold cavity (203) is provided on a side adjacent to the fixed mold base (201) and the movable mold base (202), and a plurality of lower locking holes (204) are provided at the bottom of the inner side walls of the fixed mold base (201) and the movable mold base (202), respectively.

3. The powder metallurgy forming die for high-neck flange according to claim 2, characterized in that: The upper die mechanism (4) comprises a second hydraulic cylinder (401), a die-casting frame (402), a spring (403), a slide plate (404), a plurality of locking pins (405) and a plurality of upper locking holes (406); The second hydraulic cylinder (401) is installed at the middle of the upper surface of the upper bracket (103), the bottom of the outer wall of the die-casting frame (402) is slidably connected to the inner wall of the inner mold cavity (203), the top of the die-casting frame (402) is fixedly connected to the piston rod of the second hydraulic cylinder (401), the slide plate (404) is slidably connected to the outer wall of the die-casting frame (402), the spring (403) is fixedly connected between the die-casting frame (402) and the slide plate (404), a plurality of locking pins (405) are fixedly connected to the bottom of the lower bracket (101), a plurality of upper locking holes (406) are respectively opened on the upper surfaces of the fixed mold base (201) and the movable mold base (202), and the outer wall of the locking pin (405) is slidably connected to the inner wall of the upper locking hole (406).

4. The powder metallurgy forming die for high-neck flange according to claim 3, characterized in that: The overturning and unloading mechanism (5) comprises a reduction motor (501), an overturning plate frame (502) and a mounting groove (503); The reduction motor (501) is mounted on one side of the lower bracket (101), one end of the flip plate frame (502) is fixedly connected to the output shaft of the reduction motor (501), the other end of the flip plate frame (502) is rotatably connected to the inner wall of the lower bracket (101), and the mounting groove (503) is provided in the middle of the lower surface of the flip plate frame (502).

5. The powder metallurgy forming die for high-neck flange according to claim 4, characterized in that: The lower ejection mold mechanism (3) comprises a first hydraulic cylinder (301), an inner mold core (302) and two guide connecting rods (303); The first hydraulic cylinder (301) is installed on the inner wall of the installation groove (503), one end of the first hydraulic cylinder (301) passes through the inner wall of the flip plate frame (502), the inner mold core (302) is installed on one end of the piston rod of the first hydraulic cylinder (301), the outer walls of the two guide connecting rods (303) are slidably connected to the inner wall of the flip plate frame (502), and the tops of the two guide connecting rods (303) are fixedly connected to the bottom of the inner mold core (302).

6. The powder metallurgy forming die for high-neck flange according to claim 5, characterized in that: The inner mold core (302) is composed of a mold core plate (321), a plurality of mold core pins (322) and a mold core column (323); The core plate (321) is fixedly connected to one end of the piston rod of the first hydraulic cylinder (301), the core column (323) is arranged in the middle of the upper surface of the core plate (321), the inner wall of the die-casting frame (402) is slidably connected to the outer wall of the core column (323), and a plurality of core pins (322) are arranged in a ring on the upper surface of the core plate (321), and the outer wall of the core pins (322) is slidably connected to the inner wall of the lower locking hole (204).

7. The powder metallurgy forming die for high-neck flange according to claim 1, characterized in that: The mold opening and closing driving mechanism (8) further comprises a connecting frame (801) and a connecting column (803); The connecting frame (801) is fixedly connected to one side of the movable mold base (202), one end of the piston rod of the third hydraulic cylinder (802) is hinged to the middle of the inner wall of the connecting frame (801), the connecting column (803) is fixedly connected to one side of the inner wall of the fixed mold base (201), and the other end of the third hydraulic cylinder (802) is hinged to the middle of the outer wall of the connecting column (803).

8. The powder metallurgy forming die for high-neck flange according to claim 2, characterized in that: A powder conveying mechanism (6) is installed on one side of the fixed die base (201), and the powder conveying mechanism (6) comprises a material storage box (601), a material conveying pipe (602), a driving motor (603) and a dragon plate (604); The material storage box (601) is fixedly connected to one side of the upper surface of the fixed mold base (201), the material delivery pipe (602) is fixedly connected to the top of the inner wall of the fixed mold base (201), one end of the material delivery pipe (602) is connected to the inner mold cavity (203), the drive motor (603) is installed on the other end of the material delivery pipe (602), the bottom of the material storage box (601) is connected to the top of the outer wall of the material delivery pipe (602), the output shaft of the drive motor (603) passes through the inner wall of the material delivery pipe (602), and one end of the dragon plate (604) is fixedly connected to the output shaft of the drive motor (603).

9. The powder metallurgy forming die for high-neck flange according to claim 1, characterized in that: A material level sensor (71) is installed on the top of the inner side wall of the fixed mold base (201) and the movable mold base (202); a light-transmitting sheet (72) is provided on one side of the material level sensor (71); an electric control box (73) is installed on one side of the lower bracket (101); a central controller (74) is installed in the middle of the inner side wall of the electric control box (73); and a relay (75) is installed at the bottom of the inner side wall of the electric control box (73).

10. The powder metallurgy forming die for high-neck flange according to claim 8, characterized in that: A cover plate (76) is hingedly connected to one side of the upper surface of the material storage box (601), a side support plate (77) is fixedly connected to one side of the side bracket (102), and the bottom of the movable mold base (202) is slidably connected to the upper surface of the side support plate (77).

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