CN115475941A - Processing die for powder metallurgy forming - Google Patents

Abstract

The invention discloses a processing die for powder metallurgy forming, which belongs to the technical field of powder metallurgy, and comprises a female die, an upper punch assembly and a lower punch assembly, wherein the upper punch assembly comprises an upper punch top plate, an upper punch and an upper draw hook, the upper punch can penetrate into a cavity of the female die from top to bottom, the upper end of the upper draw hook is hinged with the side surface of the upper punch top plate, the lower end of the upper draw hook is provided with a wedge-shaped hook head, the lower punch assembly comprises a lower punch bottom plate, a lower punch and a lower draw hook, the lower punch can penetrate into the cavity of the female die from bottom to top, the lower end of the lower draw hook is fixed on the side surface of the lower punch bottom plate, and the upper end of the lower draw hook is provided with the wedge-shaped hook head. When the upper punch assembly and the lower punch assembly are assembled to press powder, the upper draw hook and the lower draw hook can be mutually hooked, and then the upper punch assembly can be driven to move upwards together when moving upwards in the die opening process, so that a pressed part model is ejected upwards from a female die cavity, the die taking efficiency is improved, and the safety of the part model is guaranteed.

Description

Processing die for powder metallurgy forming

Technical Field

The invention relates to the technical field of powder metallurgy, in particular to a processing die for powder metallurgy forming.

Background

Powder metallurgy is a process technology for manufacturing metal materials, composite materials and various products by preparing metal powder or using the metal powder as a raw material and forming and sintering the metal powder. And the forming of the metal powder is generally performed by pressing with a die. The die is various dies and tools which are used for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. The die has a specific contour or inner cavity shape, the blank can obtain a corresponding three-dimensional shape by using the inner cavity shape, the die generally comprises a movable die and a fixed die, the movable die and the fixed die can take out a product when being separated, and powder can be pressed and molded in the die cavity when being closed. For powder metallurgy, because of the large pressures required, bi-directional compaction powder metallurgy dies are commonly used. The specific structure generally comprises an upper punch, a lower punch and a female die, wherein the two punches extrude powder in a cavity of the female die in two directions to form a mold. The mould has the disadvantages that the female mould is generally of an integral structure and cannot be separated, and when the mould is taken, a separate tool is required to eject the mould from the cavity of the female mould, so that the operation is troublesome, and the mould is easily damaged, thereby affecting the product quality.

Disclosure of Invention

In order to overcome the defects that the existing bidirectional pressing powder metallurgy die is inconvenient to take out, and the like, the invention aims to solve the technical problems that: the processing die for powder metallurgy forming can be conveniently demoulded and ensure the safety of a model.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a processing die for powder metallurgy forming,

the punching die comprises a female die assembly, an upper punching assembly and a lower punching assembly;

the female die assembly comprises a female die, and a die cavity penetrating through the upper surface and the lower surface of the female die is arranged on the female die;

the upper punch assembly comprises an upper punch top plate, an upper punch and an upper draw hook, the upper punch is positioned in the center of the bottom of the upper punch top plate, the upper punch can penetrate into a cavity of the female die from top to bottom, the upper end of the upper draw hook is hinged with the side face of the upper punch top plate, and the lower end of the upper draw hook is provided with a wedge-shaped hook head;

the lower punch assembly comprises a lower punch bottom plate, a lower punch and a lower pull hook, the lower punch is positioned in the center of the top of the lower punch bottom plate, the lower punch can penetrate into a cavity of the female die from bottom to top, the lower end of the lower pull hook is fixed on the side surface of the lower punch bottom plate, and the upper end of the lower pull hook is provided with a wedge-shaped hook head;

when the upper punch component moves downwards, the upper draw hook can rotate around a hinge point at the upper end of the upper draw hook under the action of inclined planes of wedge-shaped hook heads of the upper draw hook and the lower draw hook and then is hooked with the lower draw hook.

Further, still including the dress powder subassembly, the dress powder subassembly is including dress powder support and the dress powder groove of slip setting on dress powder support, dress powder groove bottom is equipped with the blanking mouth, and its bottom and dress powder support upper surface in close contact with, the bed die sets up in the bottom of dress powder support one end, is equipped with the dress powder mouth that is linked together with the die cavity of bed die on the dress powder support.

Furthermore, the powder filling assembly further comprises a powder feeding shoe seat, the powder feeding shoe seat is positioned at one end, far away from the female die, of the powder filling support, a powder feeding baffle capable of being opened in a sliding mode along the plane of the top of the powder feeding shoe seat is arranged at the top of the powder feeding shoe seat, the powder filling groove can slide into the powder feeding shoe seat, the top of the powder feeding shoe seat is flush with the bottom surface of the powder feeding baffle, and the opening at the top of the powder filling groove is completely shielded by the powder feeding baffle.

Furthermore, a draw hook tripping rod is arranged on the side face of the powder containing groove, one end of the draw hook tripping rod is fixedly connected with the powder containing groove, an arc-shaped bulge protruding outwards is arranged on one side, away from the powder containing groove, of the other end of the draw hook tripping rod, and when the powder containing groove moves towards the direction of the female die, the arc-shaped bulge on the draw hook tripping rod can enable the upper draw hook to rotate around a hinged joint of the upper end of the upper draw hook, so that the upper draw hook can be separated from the lower draw hook.

Further, the one end that is close to the bed die on the dress powder groove is equipped with the part liftout plate, the one end that is close to the bed die on the dress powder support is equipped with the part and receives the frame, and when the dress powder groove removed directly over the dress powder mouth, the part liftout plate can stretch into in the part receives the frame.

Further, sliding grooves communicated with the middle cavity are formed in two opposite sides of the female die, sliding blocks are arranged in the sliding grooves in a sliding mode, an oil cylinder seat used for being connected with an external oil cylinder is arranged at the outer end of each sliding block, and a shaping portion is arranged at the inner end of each sliding block.

Further, go up the mould towards subassembly still includes yoke plate, last mould punching plate, goes up mould towards fixed plate and last mould towards the guide pillar, yoke plate is located the top of last mould towards the roof, goes up the mould towards fixed plate and is located the bottom of last mould towards the roof, go up the mould towards pass last mould towards fixed plate after rethread mould punching plate and last mould towards the roof and link to each other, go up the upper end and the last mould towards roof fixed connection of guide pillar, the guide hole on the bed die and sliding connection with it can be gone into to the lower extreme.

The lower punch assembly further comprises a lower punch fixing plate and a lower punch guide post, the lower punch fixing plate is located at the top of the lower punch base plate, the lower ends of the lower punch and the lower punch guide post penetrate through the lower punch fixing plate and then are fixedly connected with the lower punch base plate, and the lower punch guide post can penetrate into the guide hole in the female die and is in sliding connection with the guide hole.

The lower punch assembly comprises a lower punch base plate, a lower punch, a lower yoke plate and a lower punch pressing plate, wherein the lower punch base plate is arranged below the lower punch assembly, the lower end of the lower punch and the lower end of the lower yoke plate are fixed to the top of the lower punch base plate after penetrating through the lower punch base plate, the lower yoke plate is arranged at the bottom of the lower punch base plate, the lower punch pressing plate is arranged between the lower punch and the lower punch base plate, the upper end of the lower punch guide post can penetrate into guide holes of the lower punch base plate and the lower punch base plate from bottom to top and is in sliding connection with the guide holes, a through hole is formed in the middle of the lower punch, and the lower punch can penetrate through the through hole in the middle of the lower punch from bottom to top.

Further, the below of bed die still is equipped with the bed die bottom plate, be equipped with on the bed die bottom plate and supply drag hook and lower draw hook to pass and lead and spacing opening to it, the bottom of bed die bottom plate is equipped with stop screw and spacing post, stop screw upper end and bed die bottom plate fixed connection, the lower extreme passes down the stamping fixed plate and sliding connection with it, and stop screw's lower extreme is equipped with stop nut, spacing post upper end and bed die bottom plate fixed connection, the lower extreme be equipped with can with the spacing portion of plug bottom plate bottom contact.

The beneficial effects of the invention are: through set up the drag hook on the subassembly is dashed to last mould, set up down the drag hook on the subassembly is dashed to the lower mould, when last mould dashes subassembly and lower mould and dashes the subassembly compound die suppression powder, go up the drag hook and can the hookup each other with lower drag hook, at the die sinking in-process afterwards, go up the mould and dash the subassembly and shift up, the lower mould is dashed to move up through last drag hook and lower drag hook simultaneously to upwards ejecting in following the bed die cavity with the part model that will suppress, can improve the efficiency of getting the mould, and guarantee the safety of part model.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the construction of the female die assembly of the present invention;

FIG. 3 is a schematic view of the upper punch assembly of the present invention;

FIG. 4 is a schematic view of the lower punch assembly of the present invention;

FIG. 5 is a schematic view of the powder charging assembly of the present invention;

FIG. 6 is a schematic view of a mandrel assembly of the present invention;

FIG. 7 is a schematic view of the invention in a configuration ready for loading;

FIG. 8 is a schematic view of the powder filling structure of the present invention;

FIG. 9 is a schematic view of the structure of the stamper of the present invention;

FIG. 10 is a schematic view of the present invention in a mold-removing configuration;

FIG. 11 is a schematic view of a molded part form of the present invention;

FIG. 12 is a cross-sectional view of a molded part of the invention;

the drawing shows 1-female die assembly, 2-upper die assembly, 3-lower die assembly, 4-powder-charging assembly, 5-mandrel assembly, 11-female die, 12-cavity, 13-chute, 14-slide, 15-cylinder block, 16-female die bottom plate, 17-limit screw, 18-limit post, 21-upper die top plate, 22-upper die, 23-upper hook, 24-upper yoke plate, 25-upper die pressing plate, 26-upper die fixing plate, 27-upper die guide post, 31-lower die bottom plate, 32-lower die, 33-lower hook, 34-lower die fixing plate, 35-lower die guide post, 41-powder-charging holder, 42-powder-charging slot, 43-powder-charging hole, 44-powder-feeding shoe holder, 45-powder-feeding baffle, 46-hook trip lever, 47-arc-shaped protrusion, 48-part ejecting plate, 49-part-receiving rack, 51-mandrel bottom plate, 52-mandrel, 53-mandrel fixing plate, 54-pressing plate, 55-mandrel lower yoke plate, and 56-lower die bottom plate.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the processing die for powder metallurgy forming of the present invention comprises a female die assembly 1, an upper punch assembly 2 and a lower punch assembly 3;

the female die assembly 1 comprises a female die 11, and a die cavity 12 penetrating through the upper surface and the lower surface of the female die 11 is arranged on the female die 11;

the upper punch assembly 2 comprises an upper punch top plate 21, an upper punch 22 and an upper draw hook 23, wherein the upper punch 22 is positioned in the center of the bottom of the upper punch top plate 21, the upper punch 22 can penetrate into the cavity 12 of the female die 11 from top to bottom, the upper end of the upper draw hook 23 is hinged with the side surface of the upper punch top plate 21, and the lower end of the upper draw hook 23 is provided with a wedge-shaped hook head;

the lower punch assembly 3 comprises a lower punch bottom plate 31, a lower punch 32 and a lower draw hook 33, the lower punch 32 is positioned in the center of the top of the lower punch bottom plate 31, the lower punch 32 can penetrate into the cavity 12 of the female die 11 from bottom to top, the lower end of the lower draw hook 33 is fixed on the side surface of the lower punch bottom plate 31, and the upper end of the lower draw hook 33 is provided with a wedge-shaped hook head;

when the upper punch assembly 2 moves downwards, the upper draw hook 23 can rotate around the hinge point at the upper end thereof under the action of the inclined surfaces of the wedge-shaped hook heads of the upper draw hook 23 and the lower draw hook 33, and then is hooked with the lower draw hook 33.

The working process of the invention is as follows: as shown in fig. 8, the upper punch assembly 2 moves up, the upper punch 22 is separated from the female die 11, the lower punch assembly 3 moves down, but the lower punch 32 is not separated from the cavity 12 of the female die 11, then metallurgical powder is filled into the cavity 12 of the female die 11, then the upper punch assembly 2 moves down, the upper punch 22 enters the cavity 12 of the female die 11, as shown in fig. 9, the upper punch 22 and the lower punch 32 simultaneously apply pressure to press and form the metallurgical powder in the cavity 12, at the same time, the upper draw hook 23 contacts and hooks with the wedge-shaped hook head of the lower draw hook 33, finally, after the powder is formed, the upper punch assembly 2 moves up, then the lower punch assembly 3 is driven by the upper draw hook 23 and the lower draw hook 33 to move up, the lower punch 32 ejects the formed part model upward until the part model is completely ejected out of the cavity 12 of the female die 11, the upper punch assembly 2 stops moving, as shown in fig. 10, and at this time, the part model can be easily taken away. When next pressing is needed, the upper draw hook 23 can be rotated to be separated from the lower draw hook 33, the lower punch assembly 3 can move downwards under the action of gravity, and the lower punch 32 is withdrawn from the cavity 12 of the female die 11, so that next charging is facilitated.

As shown in fig. 1, fig. 2, fig. 5, in order to facilitate charging, the powder loading assembly 4 is further added, the powder loading assembly 4 includes a powder loading support 41 and a powder loading groove 42 slidably disposed on the powder loading support 41, a blanking port is disposed at the bottom of the powder loading groove 42, the bottom of the powder loading groove is in close contact with the upper surface of the powder loading support 41, the female die 11 is disposed at the bottom of one end of the powder loading support 41, and a powder loading port 43 communicated with the cavity 12 of the female die 11 is disposed on the powder loading support 41. The charging process is as follows: as shown in fig. 7 and 8, due to the limitation of space, it is inconvenient to directly charge materials below the punch assembly 2, so the powder containing groove 42 can be slid to the outside of the punch assembly 2, then specific powder is contained in the powder containing groove 42, and finally the powder is moved towards the female die 11, because the bottom of the powder containing groove 42 is in close contact with the upper surface of the powder containing bracket 41, no material leakage occurs in the moving process until the powder containing groove 42 reaches the upper part of the powder containing opening 43, metallurgical powder enters the powder containing opening 43 from the blanking opening and then enters the cavity 12 of the female die 11, so that the charging process is completed, and then the powder containing groove 42 is withdrawn for subsequent die pressing operation. The movement of the powder containing groove 42 can be realized by an external electro-hydraulic push rod or a linear motor and the like.

Further, as shown in fig. 5 and 7, the powder containing assembly 4 further includes a powder feeding shoe 44, the powder feeding shoe 44 is located at one end of the powder containing support 41 far away from the female mold 11, a powder feeding baffle 45 capable of being opened along a top plane of the powder feeding shoe 44 is arranged at the top of the powder feeding shoe 44, the powder containing groove 42 can be slid into the powder feeding shoe 44, the top of the powder containing groove is flush with the bottom surface of the powder feeding baffle 45, and an opening at the top of the powder containing groove 42 is completely shielded by the powder feeding baffle 45. When powder is filled, the powder filling groove 42 is moved into the powder feeding shoe base 44, then the powder feeding baffle plate 45 is opened, metallurgical powder is filled into the powder filling groove 42, more powder can be properly filled in the process, the powder exceeds the top of the powder filling groove 42, then the powder feeding baffle plate 45 is pushed in, and the powder feeding baffle plate 45 can scrape the powder in the powder filling groove 42 to ensure that the powder is just filled in the powder filling groove 42. Therefore, the charging amount can be quickly determined by the powder feeding shoe 44 at a time, and the production efficiency can be improved.

As shown in fig. 5 and 7, a hook tripping rod 46 is further disposed on a side surface of the powder containing groove 42, one end of the hook tripping rod 46 is fixedly connected to the powder containing groove 42, and an arc-shaped protrusion 47 protruding outwards is disposed on one side of the other end away from the powder containing groove 42. The purpose of the hook tripping rod 46 is to make the upper hook 23 rotate around the upper end hinge point thereof by the arc-shaped protrusion 47 on the hook tripping rod 46 so as to be separated from the lower hook 33 and make the lower punch 32 withdraw from the cavity 12 of the female die 11 for facilitating the subsequent powder charging operation when the powder charging groove 42 moves towards the female die 11 in the next charging process after the die is taken out.

Since the space between the upper punch assembly 2 and the female die 11 is limited, even after the lower punch 32 pushes the part mold out of the cavity 12, it may be inconvenient to take out the part mold, and therefore, a part ejecting plate 48 is provided at one end of the powder containing groove 42 close to the female die 11, and a part receiving shelf 49 is provided at one end of the powder containing support 41 close to the female die 11. As shown in fig. 8, after the part mold is ejected out of the cavity 12 of the female mold 11, the powder charging slot 42 may be moved once again, or the part mold may be pushed to the part receiving shelf 49 by the part ejecting plate 48 in the next powder charging process, so that the part mold can be easily taken away.

For the female die assembly 1, the cavity 12 of the prior art female die 11 is generally a relatively regular cylinder or polygonal prism, and for some parts with a thin neck, there is no way to press the part as shown in fig. 11. Therefore, in order to press the part with the neck, the female die 11 is provided with sliding grooves 13 communicated with the middle cavity 12 at two opposite sides, as shown in fig. 2, the sliding grooves 13 are internally provided with sliding blocks 14 in a sliding manner, the outer ends of the sliding blocks 14 are provided with oil cylinder seats 15 used for connecting with external oil cylinders, and the inner ends of the sliding blocks 14 are provided with shaping parts. Before powder filling or in the die pressing process, the two sliding blocks 14 can be moved by inward extrusion, the neck part is pressed on the part model by utilizing the shaping part at the inner end of the sliding blocks, then the sliding blocks 14 are withdrawn, and the die taking operation is carried out, so that the part model with the neck part shown in figure 1 can be obtained.

For the upper punch assembly 2, as shown in fig. 3, the upper punch assembly 2 further includes an upper yoke plate 24, an upper punch plate 25, an upper punch fixing plate 26 and an upper punch guide post 27, the upper yoke plate 24 is located at the top of the upper punch plate 21, the upper punch fixing plate 26 is located at the bottom of the upper punch plate 21, the upper punch 22 passes through the upper punch fixing plate 26 and then is connected to the upper punch plate 21 through the upper punch plate 25, the upper end of the upper punch guide post 27 is fixedly connected to the upper punch plate 21, and the lower end thereof can penetrate into and be slidably connected to the guide hole of the female die 11. The upper yoke plate 24 is used in conjunction with an external drive mechanism to apply force to the upper punch assembly 2. The upper punch fixing plate 26 is used for fixing the upper punch 22 and the upper punch guide post 27, and the upper punch guide post 27 is used for increasing the stability in the die pressing process. The upper die press plate 25 is made of a high-strength steel material so as to withstand a large pressure during the press molding.

As for the lower punch assembly 3, as shown in fig. 4, the lower punch assembly 3 further includes a lower punch fixing plate 34 and a lower punch guide post 35, the lower punch fixing plate 34 is located at the top of the lower punch base plate 31, the lower ends of the lower punch 32 and the lower punch guide post 35 both penetrate through the lower punch fixing plate 34 and then are fixedly connected to the lower punch base plate 31, and the lower punch guide post 35 can penetrate into the guide hole of the female die 11 and is slidably connected to the guide hole. Similarly, the lower punch fixing plate 34 is used to fix the lower punch 32 and the lower punch guide post 35, and the lower punch guide post 35 is used to increase stability during the die pressing process.

For some parts with more complicated structures, for example, a blind hole is added to the bottom of the part shown in fig. 11, as shown in fig. 12. For the pressing of such parts, the mandrel assembly 5 is further disposed below the lower punch assembly 3, as shown in fig. 6, the mandrel assembly 5 includes a mandrel base plate 51, a mandrel 52, a mandrel fixing plate 53, a mandrel pressing plate 54, a mandrel guide pillar 55 and a lower yoke plate 56, the mandrel fixing plate 53 is located on the top of the mandrel base plate 51, the lower ends of the mandrel 52 and the mandrel guide pillar 55 penetrate through the mandrel fixing plate 53 and are fixed on the top of the mandrel base plate 51, the lower yoke plate 56 is located at the bottom of the mandrel base plate 51, the mandrel pressing plate 54 is located between the mandrel 52 and the mandrel base plate 51, the upper end of the mandrel guide pillar 55 can penetrate through and is slidably connected with the guide holes of the lower punch base plate 31 and the lower punch fixing plate 34 from bottom to top, a through hole is disposed in the middle of the lower punch 32, and the mandrel 52 can penetrate through the through hole in the middle of the lower punch 32 from bottom to top. The whole die pressing process is as follows: as shown in fig. 9, the external driving mechanism drives the lower yoke plate 56 to move upward, during the moving process, the mandrel fixing plate 53 first contacts with the lower punch base plate 31, the mandrel 52 passes through the lower punch 32, the upper end 52 of the mandrel is matched with the upper end of the lower punch 32 to form the bottom contour of the part model, and then the mandrel base plate 51 continues to drive the lower punch 32 to move upward, thereby completing the die-pressing operation. After the die pressing is completed, the driving mechanism drives the mandrel base plate 51 to move downwards, as shown in fig. 10, so that the mandrel 52 is separated from the part model, and the subsequent die taking process is not influenced.

Further, in order to conveniently limit the moving range of the lower punch assembly 3 and the mandrel assembly 5, a female die base plate 16 is further arranged below the female die 1, as shown in fig. 2, an opening through which the upper draw hook 23 and the lower draw hook 33 pass and guide and limit the upper draw hook and the lower draw hook 33 is formed in the female die base plate 16, and the reliability of connection and subsequent movement of the upper draw hook and the lower draw hook is guaranteed. The bottom of the female die base plate 16 is provided with a limit screw 17 and a limit column 18, the upper end of the limit screw 17 is fixedly connected with the female die base plate 16, the lower end of the limit screw 17 penetrates through the lower punch fixing plate 34 and is in sliding connection with the lower punch fixing plate, the lower end of the limit screw 17 is provided with a limit nut, when the lower punch assembly 3 moves downwards to be in contact with the limit nut, the lower punch assembly cannot move continuously, and at the moment, the lower punch 32 cannot be separated from the cavity 12 of the female die 11, as shown in fig. 8. The upper end of the limiting column 18 is fixedly connected with the female die bottom plate 16, the lower end is provided with a limiting part which can be contacted with the bottom of the mandrel bottom plate 51, and the mandrel component 5 moves until the mandrel bottom plate 51 is contacted with the limiting part at most in the downward moving process, so that the mandrel 52 is prevented from being separated from the lower punch 32, as shown in fig. 8. The connection tightness of all components can be ensured through the limiting screw 17 and the limiting column 18, the quick die assembly and the demoulding operation are convenient, and the production efficiency is improved.

Claims (10)

1. A mold processing for powder metallurgy shaping, characterized by:

the punching die comprises a female die assembly (1), an upper punching assembly (2) and a lower punching assembly (3);

the female die assembly (1) comprises a female die (11), and a die cavity (12) penetrating through the upper surface and the lower surface of the female die (11) is arranged on the female die (11);

the upper punch assembly (2) comprises an upper punch top plate (21), an upper punch (22) and an upper draw hook (23), the upper punch (22) is positioned at the center of the bottom of the upper punch top plate (21), the upper punch (22) can penetrate into a cavity (12) of a female die (11) from top to bottom, the upper end of the upper draw hook (23) is hinged with the side surface of the upper punch top plate (21), and the lower end of the upper draw hook (23) is provided with a wedge-shaped hook head;

the lower punch assembly (3) comprises a lower punch bottom plate (31), a lower punch (32) and a lower pull hook (33), the lower punch (32) is located at the center of the top of the lower punch bottom plate (31), the lower punch (32) can penetrate into a cavity (12) of a female die (11) from bottom to top, the lower end of the lower pull hook (33) is fixed on the side face of the lower punch bottom plate (31), and the upper end of the lower pull hook (33) is provided with a wedge-shaped hook head;

when the upper stamping component (2) moves downwards, the upper draw hook (23) can rotate around a hinge point at the upper end under the inclined surface of the wedge-shaped hook heads of the upper draw hook (23) and the lower draw hook (33) and then is hooked with the lower draw hook (33).

2. The tooling die set forth in claim 1 for powder metallurgy forming wherein: still including dress powder subassembly (4), dress powder subassembly (4) is including dress powder support (41) and dress powder groove (42) of slip setting on dress powder support (41), dress powder groove (42) bottom is equipped with the blanking mouth, and its bottom and dress powder support (41) upper surface in close contact with, bed die (11) set up in the bottom of dress powder support (41) one end, are equipped with dress powder mouth (43) that are linked together with die cavity (12) of bed die (11) on dress powder support (41).

3. The processing die for powder metallurgy forming as set forth in claim 2, wherein: powder charging assembly (4) still includes powder feeding shoe (44), powder feeding shoe (44) are located the one end of keeping away from bed die (11) on powder charging support (41), and powder feeding shoe (44) top is equipped with can follow its top plane and slide the powder baffle (45) of opening that advance, powder charging groove (42) can slide into powder feeding shoe (44), and its top flushes with powder baffle (45) bottom surface, and powder charging groove (42) open-top is sheltered from by powder baffle (45) completely.

4. The tooling die set forth in claim 2 for powder metallurgy forming wherein: the side of dress powder groove (42) is equipped with drag hook trip bar (46), drag hook trip bar (46) one end and dress powder groove (42) fixed connection, keep away from one side of dress powder groove (42) on the other end and be equipped with outside convex arc arch (47), when dress powder groove (42) moved to bed die (11) direction, arc arch (47) on drag hook trip bar (46) can make upper drag hook (23) rotate around its upper end pin joint to break away from with lower drag hook (33).

5. The tooling die set forth in claim 2 for powder metallurgy forming wherein: dress powder groove (42) is gone up the one end that is close to bed die (11) and is equipped with part liftout plate (48), the one end that is close to bed die (11) on dress powder support (41) is equipped with part receiving frame (49), and when dress powder groove (42) removed dress powder mouth (43) directly over, part liftout plate (48) can stretch into in the part receiving frame (49).

6. The processing die for powder metallurgy forming as set forth in claim 1, wherein: the die is characterized in that sliding grooves (13) communicated with a middle cavity (12) are formed in two opposite sides of the female die (11), sliding blocks (14) are arranged in the sliding grooves (13) in a sliding mode, an oil cylinder seat (15) used for being connected with an external oil cylinder is arranged at the outer end of each sliding block (14), and a shaping portion is arranged at the inner end of each sliding block.

7. The tooling die set forth in claim 1 for powder metallurgy forming wherein: go up mould towards subassembly (2) and still include yoke-shaped plate (24), go up mould punching plate (25), go up mould towards fixed plate (26) and go up mould towards guide pillar (27), yoke-shaped plate (24) are located the mould and dash roof (21) top, go up mould towards fixed plate (26) and are located the mould and dash roof (21) bottom, go up mould towards (22) and pass and go up mould towards behind fixed plate (26) rethread mould punching plate (25) and go up mould towards roof (21) and link to each other, go up the upper end and the last mould that go up mould towards guide pillar (27) and dash roof (21) fixed connection, the lower extreme can penetrate the guide hole on bed die (11) and sliding connection with it.

8. The tooling die set forth in claim 1 for powder metallurgy forming wherein: the lower punch assembly (3) further comprises a lower punch fixing plate (34) and a lower punch guide post (35), the lower punch fixing plate (34) is located at the top of the lower punch bottom plate (31), the lower ends of the lower punch (32) and the lower punch guide post (35) penetrate through the lower punch fixing plate (34) and then are fixedly connected with the lower punch bottom plate (31), and the lower punch guide post (35) can penetrate into a guide hole in the female die (11) and is in sliding connection with the guide hole.

9. The tooling die set for powder metallurgy forming as set forth in claim 8 wherein: a mandrel assembly (5) is further arranged below the lower punch assembly (3), the mandrel assembly (5) comprises a mandrel base plate (51), a mandrel (52), a mandrel fixing plate (53), a mandrel pressing plate (54), a mandrel guide pillar (55) and a lower yoke plate (56), the mandrel fixing plate (53) is located at the top of the mandrel base plate (51), the lower ends of the mandrel (52) and the mandrel guide pillar (55) penetrate through the mandrel fixing plate (53) and then are fixed at the top of the mandrel base plate (51), the lower yoke plate (56) is located at the bottom of the mandrel base plate (51), the mandrel pressing plate (54) is located between the mandrel (52) and the mandrel base plate (51), the upper end of the mandrel guide pillar (55) can penetrate through guide holes of the lower punch base plate (31) and the lower punch fixing plate (34) from bottom to top and is in sliding connection with the guide holes, a through hole is formed in the middle of the lower punch (32), and the mandrel (52) can penetrate through a through hole in the middle of the lower punch (32) from bottom to top.

10. The tooling mold for powder metallurgy forming of claim 9 wherein: the below of bed die (11) still is equipped with bed die bottom plate (16), be equipped with on bed die bottom plate (16) and supply drag hook (23) and lower drag hook (33) to pass and lead and spacing opening to it, the bottom of bed die bottom plate (16) is equipped with stop screw (17) and spacing post (18), stop screw (17) upper end and bed die bottom plate (16) fixed connection, lower extreme pass down die punch fixing plate (34) and sliding connection with it, and the lower extreme of stop screw (17) is equipped with stop nut, spacing post (18) upper end and bed die bottom plate (16) fixed connection, the lower extreme be equipped with can with the spacing portion of plug bottom plate (51) bottom contact.

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