CN216828641U

CN216828641U - Powder metallurgy forming die

Info

Publication number: CN216828641U
Application number: CN202220384519.4U
Authority: CN
Inventors: 张友富; 王小根; 朱小辉; 潘明杰; 高启明
Original assignee: Taizhou Oufeng Machinery Co ltd
Current assignee: Taizhou Oufeng Machinery Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-06-28
Anticipated expiration: 2032-02-22

Abstract

The utility model belongs to the technical field of powder metallurgy, refer in particular to a powder metallurgy forming die, including well mould, the smooth last mould of establishing in well mould of lower extreme and the smooth lower mould of establishing in well mould in upper end, it is equipped with the recess with semi-circular part looks adaptation to go up the mould lower extreme, the internal face of recess and semi-circular part's outer disc looks adaptation, the internal face of recess, lower mould forms the shaping chamber of shaping semi-circular part, be equipped with floating towards along vertical smooth in the well mould, floating towards being equipped with two and being located the lower mould both sides respectively, when going up the mould and moving down, the lower terminal surface of going up the mould presses respectively and establishes to float and drive floating towards moving down on towards, and the overlap is difficult for appearing in fashioned semi-circular part, and the part percent of pass is high.

Description

Powder metallurgy forming die

The technical field is as follows:

the utility model belongs to the technical field of powder metallurgy, refer in particular to a powder metallurgy forming die.

The background art comprises the following steps:

powder metallurgy is a process technique for producing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products.

The existing mold for processing the semicircular part shown in fig. 1 and 2 comprises an upper mold matched with the outer circular surface of the semicircular part and a lower mold matched with the lower plane of the semicircular part, wherein a cavity matched with the shape and structure of the semicircular part is formed between the upper mold and the lower mold.

The semicircular part formed by the die is easy to form flash at the junction of the outer circular surface and the lower plane of the semicircular part, so that the semicircular part is unqualified.

The invention content is as follows:

the utility model aims at providing a powder metallurgy forming die, its fashioned semi-circular part is difficult for appearing the overlap, and the part qualification rate is high.

The utility model discloses a realize like this:

the utility model provides a powder metallurgy forming die, includes well mould, the gliding last mould of establishing in well mould of lower extreme and the gliding lower mould of establishing in well mould of upper end, go up the mould lower extreme and be equipped with the recess with semi-circular part looks adaptation, the internal face of recess and semi-circular part's outer disc looks adaptation, the internal face of the up end of recess, lower mould forms the shaping chamber of shaping semi-circular part, it is equipped with unsteady towards along vertical smooth in the well mould, unsteady towards being equipped with two and being located the lower mould both sides respectively, when going up the mould and moving down, the lower terminal surface of going up the mould presses respectively to establish and drives unsteady towards moving down on unsteady towards.

In the above powder metallurgy forming die, one end of a guide screw is connected to the middle die, a bottom plate located below the middle die is fixed to the lower end of the floating punch, the bottom plate is arranged on a screw rod of the guide screw in a sliding mode, and a reset spring is arranged between a screw cap of the guide screw and the bottom plate.

In the above powder metallurgy forming die, the lower die comprises a first punch with an upper end surface matched with the arc-shaped concave surface of the semicircular part and a second punch with an upper end surface matched with the lower plane of the semicircular part, and the two second punches are provided with two punches and are respectively positioned on two sides of the first punch.

In foretell powder metallurgy forming die, the lower mould still includes the connection platform, and two down two towards the lower extreme all connect on the connection platform, the connection platform is stretched out to the next end that dashes.

In foretell powder metallurgy forming die, the arc concave surface includes along big concave surface and the little concave surface that arc concave surface axial set up, be equipped with the first plane between little concave surface lower extreme and the lower plane, the first plane forms the coplanar with lower plane, the up end that next dashes includes the big convex surface with big concave surface looks adaptation, with the little convex surface of little concave surface looks adaptation and with the second plane of first plane looks adaptation.

In the powder metallurgy forming die, the upper die is internally provided with the upper inner punch in a sliding manner, and the lower end of the upper inner punch is matched with the depression of the semicircular part.

In the powder metallurgy forming die, the upper die is internally provided with a punching die matched with the through hole of the semicircular part in a sliding manner, and the lower die is internally provided with an avoiding hole for avoiding the punching die; or the lower die is internally provided with a punching die matched with the through hole of the semicircular part in a sliding manner, and the upper die is internally provided with an avoiding hole for avoiding the punching die.

Compared with the prior art, the utility model outstanding advantage is:

1. the utility model discloses a well mould is interior to be slided along vertical and is equipped with the float and dash, and the lower terminal surface of upper die is pressed respectively and is established on the float and drive the float and dash and move down, and the powder can not get into between upper die and the float and dash, and the juncture of the outer disc of semicircular part and lower plane is difficult for forming the overlap, and the qualification rate of semicircular part is high;

2. in the utility model, one end of a guide screw is connected on the middle die, the lower end of the floating punch is fixed with a bottom plate positioned below the middle die, the bottom plate is arranged on a screw rod of the guide screw in a sliding way, a reset spring is arranged between a nut and the bottom plate of the guide screw, and the floating punch is effectively supported, reset and floating punch is reset and is limited downwards;

3. the utility model discloses the lower mould is still including connecting the platform, and two down two towards the lower extreme all are connected and are being connected the bench, two down towards the lower extreme and stretch out and connect the platform, two down towards effective interlock, and semi-circular part's lower plane flatness is good, and size precision is high.

Description of the drawings:

fig. 1 is a first perspective view of a semicircular part of the present invention;

FIG. 2 is a second perspective view of the semicircular part of the present invention;

FIG. 3 is a perspective view showing the mold opened state of the present invention;

fig. 4 is a cross-sectional view of the present invention in a packed state;

fig. 5 is a sectional view showing a molding state of the present invention;

FIG. 6 is a sectional view showing the opened state of the present invention;

fig. 7 is a perspective view of the next punch of the present invention.

Reference numerals: 1. a middle mold; 2. an upper die; 21. a groove; 3. a lower die; 31. next punching; 311. a large convex surface; 312. a small convex surface; 313. a second plane; 32. punching for the second time; 33. a connecting table; 4. a semicircular part; 41. an outer circular surface; 42. an arc-shaped concave surface; 421. a large concave surface; 422. a small concave surface; 423. a first plane; 43. a lower plane; 44. recessing; 45. a through hole; 5. floating punching; 6. a base plate; 7. a guide screw; 8. and (4) upward and inward punching.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 7:

the utility model provides a powder metallurgy forming die, includes well mould 1, the gliding last mould 2 of establishing in well mould 1 of lower extreme and the lower mould 3 of establishing in well mould 1 of upper end, go up 2 lower extremes of mould and be equipped with the recess 21 with 4 looks adaptations of semi-circular part, the internal face of recess 21 and the 41 looks adaptations of the outer disc of semi-circular part 4, the up end of recess 21, lower mould 3, the internal face of well mould 1 form the shaping chamber of the semi-circular part 4 of shaping, it dashes 5 to be equipped with to float along vertical smooth in well mould 1, it dashes 5 to float to be equipped with two and is located 3 both sides of lower mould respectively, when going up mould 2 and move down, goes up the lower terminal surface of mould 2 and presses respectively to establish and drive on the unsteady dashing 5 and float and dash 5 and move down.

The working principle is as follows: during filling: as shown in fig. 4, the middle die 1 moves upwards, the lower die 3, the floating punch 5 and the middle die 1 form a filling cavity, and powder is put into the filling cavity; during molding: as shown in fig. 5, the upper die 2 is moved downwards, the lower end surface of the upper die 2 is respectively pressed on the floating punch 5 to drive the floating punch 5 to move downwards, a forming cavity for forming the semicircular part 4 is formed by the groove 21, the upper end surface of the lower die 3 and the inner wall surface of the middle die 1, and the semicircular part 4 is formed in the forming cavity; after the forming is finished: as shown in fig. 6, the upper die 2 moves upward, the lower die 3 moves upward to eject the semicircular part 4, and the semicircular part 4 is taken out. The utility model discloses a powder can not get into last mould 2 and float and dash 5 between, the difficult overlap that forms of juncture of the outer disc 41 of semicircular part 4 and lower plane 43 promptly, and semicircular part 4's qualification rate is high.

In order to support the floating punch 5, reset the floating punch 5 and limit the floating punch 5 downwards, as shown in fig. 3-6, one end of a guide screw 7 is connected to the middle die 1, a bottom plate 6 located below the middle die 1 is fixed to the lower end of the floating punch 5, the bottom plate 6 is slidably arranged on a screw rod of the guide screw 7, and a reset spring is arranged between a nut of the guide screw 7 and the bottom plate 6. The upper die 2 is pressed on the floating punch 5, the floating punch 5 is driven to move downwards to compress the return spring, and the floating punch 5 moves upwards under the action of the elastic force of the return spring when the upper die 2 moves upwards. In the present embodiment, four guide screws 7 are provided.

For the convenience of forming, the lower die 3 comprises a lower punch 31 with an upper end surface matched with the arc-shaped concave surface 42 of the semicircular part 4 and a lower punch 32 with an upper end surface matched with the lower plane 43 of the semicircular part 4, and the two lower punches 32 are arranged and are respectively positioned on two sides of the lower punch 31.

In order to facilitate the linkage of the two lower punches 32, as shown in fig. 3-6, the lower die 3 further includes a connecting table 33, the lower ends of the two lower punches 32 are both connected to the connecting table 33, and the lower end of the lower punch 31 extends out of the connecting table 33.

Further, as shown in fig. 1, 2 and 7, the arc-shaped concave surface 42 includes a large concave surface 421 and a small concave surface 422 arranged along the axial direction of the arc-shaped concave surface 42, a first plane 423 is arranged between the lower end of the small concave surface 422 and the lower plane 43, the first plane 423 and the lower plane 43 form a same plane, and the upper end surface of the next punch 31 includes a large convex surface 311 adapted to the large concave surface 421, a small convex surface 312 adapted to the small concave surface 422, and a second plane 313 adapted to the first plane 423.

In order to simultaneously form the recess 44 of the semicircular part 4 and avoid subsequent processing, as shown in fig. 3, the upper die 2 is internally provided with an upper inner punch 8 in a sliding manner, and the lower end of the upper inner punch 8 is matched with the recess 44 of the semicircular part 4.

In order to simultaneously form the through holes 45 of the semicircular parts 4 and avoid subsequent processing, the upper die 2 is internally provided with a punching die matched with the through holes 45 of the semicircular parts 4 in a sliding manner, and the lower die 3 is internally provided with an avoiding hole for avoiding the punching die; or the lower die 3 is internally provided with a punching die matched with the through hole 45 of the semicircular part 4 in a sliding manner, and the upper die 2 is internally provided with an avoiding hole for avoiding the punching die.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a powder metallurgy forming die, includes well mould (1), the gliding last mould (2) of establishing in well mould (1) of lower extreme and the gliding lower mould (3) of establishing in well mould (1) of upper end, it is equipped with recess (21) with semi-circular part (4) looks adaptation to go up mould (2) lower extreme, the internal face of recess (21) and outer disc (41) looks adaptation of semi-circular part (4), the shaping chamber of the internal face formation shaping semi-circular part (4) of the up end of recess (21), lower mould (3), well mould (1), its characterized in that: the floating punch (5) is arranged in the middle die (1) along the vertical sliding direction, the floating punch (5) is provided with two parts which are respectively positioned at two sides of the lower die (3), and when the upper die (2) moves down, the lower end surface of the upper die (2) is respectively pressed on the floating punch (5) to drive the floating punch (5) to move down.

2. The powder metallurgy forming die of claim 1, wherein: the floating type middle die is characterized in that one end of a guide screw (7) is connected to the middle die (1), a bottom plate (6) located below the middle die (1) is fixed to the lower end of the floating punch (5), the bottom plate (6) is slidably arranged on a screw rod of the guide screw (7), and a reset spring is arranged between a nut of the guide screw (7) and the bottom plate (6).

3. The powder metallurgy forming die of claim 1, wherein: the lower die (3) comprises a lower punch (31) with the upper end face matched with the arc-shaped concave surface (42) of the semicircular part (4) and a lower punch (32) with the upper end face matched with the lower plane (43) of the semicircular part (4), and the two lower punches (32) are arranged and are respectively positioned on two sides of the lower punch (31).

4. The powder metallurgy forming die of claim 3, wherein: the lower die (3) further comprises a connecting table (33), the lower ends of the two lower punches (32) are connected to the connecting table (33), and the lower end of the lower punch (31) extends out of the connecting table (33).

5. The powder metallurgy forming die according to claim 3, wherein: arc concave surface (42) include along big concave surface (421) and little concave surface (422) that arc concave surface (42) axial set up, be equipped with first plane (423) between little concave surface (422) lower extreme and lower plane (43), first plane (423) and lower plane (43) form the coplanar, the up end that next dashes (31) includes big convex surface (311) with big concave surface (421) looks adaptation, little convex surface (312) with little concave surface (422) looks adaptation and second plane (313) with first plane (423) looks adaptation.

6. The powder metallurgy forming die of claim 1, wherein: the upper die (2) is internally provided with an upper inner punch (8) in a sliding manner, and the lower end of the upper inner punch (8) is matched with the recess (44) of the semicircular part (4).

7. The powder metallurgy forming die of claim 1, wherein: a punching die matched with the through hole (45) of the semicircular part (4) is arranged in the upper die (2) in a sliding manner, and an avoidance hole for avoiding the punching die is arranged in the lower die (3); or the lower die (3) is internally provided with a punching die matched with the through hole (45) of the semicircular part (4) in a sliding manner, and the upper die (2) is internally provided with an avoiding hole for avoiding the punching die.