CN219900251U - Powder metallurgy forming die for metal gasket - Google Patents
Powder metallurgy forming die for metal gasket Download PDFInfo
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- CN219900251U CN219900251U CN202320922492.4U CN202320922492U CN219900251U CN 219900251 U CN219900251 U CN 219900251U CN 202320922492 U CN202320922492 U CN 202320922492U CN 219900251 U CN219900251 U CN 219900251U
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 28
- 239000002184 metal Substances 0.000 title claims abstract description 28
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052721 tungsten Inorganic materials 0.000 abstract description 5
- 239000010937 tungsten Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of dies, and relates to a powder metallurgy forming die for a metal gasket, which comprises a split forming female die, a forming core rod, a forming upper punch and a forming lower punch, wherein the forming core rod is arranged in a guide hole of the forming lower punch in a guide fit manner; during the metal gasket forming operation, the forming core rod moves up and down to be matched with the guide hole of the forming upper punch in a guiding way; the forming female die comprises an outer lining, the bottom surface of the outer lining is fixedly connected with a forming female die fixing bottom plate, at least two female die core sections are matched in a conical inner cavity of the outer lining, at least two female die core sections form a conical female die core, and the conical female die core is matched with the conical inner cavity of the outer lining. The forming die can solve the problem that tungsten steel is damaged due to stress concentration during forming of products.
Description
Technical Field
The utility model belongs to the technical field of dies, and relates to a powder metallurgy forming die of a metal gasket.
Background
The main raw materials of powder metallurgy are metal and nonmetal powder, which are taken as raw materials, the powder is put into a die cavity after being mixed by proper proportion, and pressed by certain pressure to form a pressed compact with the shape and the size of the required part, and then the pressed compact is sintered. And then finishing, heat treatment, machining and other treatments are carried out according to the requirements to obtain the product part.
The powder metallurgy part production process has the essential advantages of high part final forming capability and high material utilization rate. And can easily realize the compounding of multiple types, fully exert the respective characteristics of raw materials of each group, and is a process technology for producing high-performance metal matrix composite materials with low cost. Is widely applied to the production of mechanical parts with complex shapes.
The powder metallurgy product can produce parts with complex structure and high precision by few or no mechanical processing such as cutting, so the material and processing cost can be greatly saved, the production cost of the product is reduced, and the advantages are particularly obvious in the mass production process. The precision and performance requirements of the parts are greatly improved due to the rapid development of the industry nowadays. And part density is often an important key to improving product performance. However, parts produced by powder metallurgy are formed by powder compaction. The presence of internal voids results in a relatively dense part with a lower product density. In order to increase the density, not only the tonnage of the machine used for molding needs to be increased, but also the used mold needs to have a certain bearing capacity. And when the density of the product reaches about 7.0g/cm < 3 >, the requirement on the tension which can be born by the die is higher. In order to ensure the precision of products, the conventional die core adopts high-hardness materials such as tungsten steel, but the high-hardness materials such as tungsten steel have good wear resistance but relatively poor toughness, and the conventional die is used for producing parts with complex shapes and higher density. If the metal pad has 4 protruding angles, the density should reach 7.2g/cm3. The stress concentration at the protruding angle during forming and pressurizing causes the tungsten steel to be unbearable and form cracking.
Disclosure of Invention
The utility model aims at the problems and provides a powder metallurgy forming die for a metal gasket, which can solve the problem that tungsten steel is damaged due to stress concentration during forming of a product.
According to the technical scheme of the utility model: a powder metallurgy forming die of a metal gasket is characterized in that: the forming die comprises a split forming die, a forming core rod, a forming upper punch and a forming lower punch, wherein the forming core rod is arranged in a guide hole of the forming lower punch in a guide fit manner; during the metal gasket forming operation, the forming core rod moves up and down to be matched with the guide hole of the forming upper punch in a guiding way;
the forming female die comprises an outer lining, the bottom surface of the outer lining is fixedly connected with a forming female die fixing bottom plate, at least two female die core halves are matched in a conical inner cavity of the outer lining, at least two female die core halves form a conical female die core, the conical female die core is matched with the conical inner cavity of the outer lining, the conical female die core is limited in the conical inner cavity of the outer lining through the forming female die fixing bottom plate, the conical female die core is provided with an axially-through forming female die cavity, and the forming female die cavity is consistent with the outline of a gasket of the metal gasket;
the forming core rod comprises a forming large core rod, a forming small core rod, a forming core rod upper cover and a forming core rod base, wherein the forming large core rod and the forming small core rod are respectively fixed on the forming core rod base through the forming core rod upper cover;
the forming upper punch comprises a forming upper punch head, a first through hole and a second through hole are formed in the forming upper punch head, the forming lower punch comprises a forming lower punch head, a third through hole and a fourth through hole are formed in the forming lower punch head, a forming large core rod can reciprocate in the first through hole and the third through hole in a guiding manner, a forming small core rod can reciprocate in the second through hole and the fourth through hole in a guiding manner, and the punch parts of the forming upper punch head and the forming lower punch head are consistent with the shape of a forming female die cavity.
As a further development of the utility model, the shaped female die fixing base plate is fastened to the bottom surface of the outer lining by means of shaped female die fixing screws.
As a further improvement of the utility model, the outer side surface of the cone female die core is arranged in a shape with large upper and lower parts, and the outer side surface of the cone female die core forms a cone angle of 3-12 degrees.
As a further improvement of the utility model, one forming large mandrel is provided, four forming small mandrels are provided, and the four forming small mandrels are circumferentially and uniformly distributed on the outer side of the forming large mandrel.
As a further improvement of the utility model, the forming mandrel upper cover is provided with a first positioning step difference hole of the mandrel upper cover, a second positioning step difference hole of the mandrel upper cover and a screw countersink;
the forming large core rod comprises a forming core rod connecting rod, a forming large core rod head is fixedly connected to the upper end of the forming core rod connecting rod through a forming large core rod locking screw, a large core rod positioning section is formed at the lower end of the forming core rod connecting rod, the forming large core rod penetrates through a first positioning section difference hole of the core rod upper cover, and the large core rod positioning section is matched with the first positioning section difference hole of the core rod upper cover;
the forming small core rod comprises a small core rod connecting rod and a small core rod head fixedly connected with the small core rod connecting rod, a first welding exhaust hole and a second welding exhaust hole which are mutually communicated are formed in the small core rod connecting rod, the upper end of the first welding exhaust hole extends to the bottom surface of the small core rod head, the outer end of the second welding exhaust hole extends to the surface of the small core rod connecting rod, a small core rod positioning section is formed at the lower end of the small core rod connecting rod, the forming small core rod penetrates through a second positioning section difference hole of the upper cover of the core rod, and the small core rod positioning section is matched with the second positioning section difference hole of the upper cover of the core rod;
the countersunk holes of the screws are aligned with the threaded holes on the base of the forming mandrel and are fastened and connected by the mandrel fixing screws.
As a further improvement of the utility model, the lower end of the shaping large core rod head is provided with a shaping large core rod head guide section, the upper end of the shaping core rod connecting rod is provided with a protruding guide section, and the shaping large core rod head guide section is matched with the protruding guide section.
The utility model has the technical effects that: the product of the utility model has reasonable and ingenious structure, adopts the multi-petal female die core to enclose and form the conical female die core, and directly distributes stress born by the product by joints in the process of pressing the product, thereby reducing the problem of die core cracking caused by stress concentration, greatly reducing the problem of die remanufacturing caused by damage and greatly reducing the production cost.
Drawings
Fig. 1 is a top view of a metal gasket.
Fig. 2 is a top view of a split forming die.
Fig. 3 is a cross-sectional view of a split forming die.
Fig. 4 is a cross-sectional view of the outer liner.
Fig. 5 is a top view of a female cone mold core.
Fig. 6 is a front view of a female cone mold core.
Fig. 7 is a cross-sectional view of a forming mandrel.
Fig. 8 is a cross-sectional view of a shaped large mandrel.
Fig. 9 is a cross-sectional view of a formed mandrel bar.
FIG. 10 is a cross-sectional view of the forming mandrel top cover.
FIG. 11 is a cross-sectional view of a forming mandrel base.
Fig. 12 is a cross-sectional view of a shaped overshoot.
Fig. 13 is a cross-sectional view of a shaped undershoot.
Fig. 14 is an assembled cross-sectional view of a powder metallurgy forming die of a metal shim.
Description of the embodiments
The following describes the embodiments of the present utility model further with reference to the drawings.
In the figures 1 to 14 of the drawings, comprises a metal gasket 1, a gasket outline 1-1, a protruding angle 1-2, a gasket central hole 1-3, a gasket round hole 1-4, a split forming female die 2, an outer lining 2-1, an inner side surface 2-1 of the outer lining, a cone female die core 2-2, a female die core mold 2-1, an outer side surface 2-2-2 of the cone female die core, a forming female die fixing bottom plate 2-3, a forming female die fixing screw 2-4, a forming female die cavity 2-5, a cavity point 2-6, a forming core rod 3, a forming large core rod 3-1, a forming large core rod head 3-1-1, a forming core rod connecting rod 3-1-2, a forming large core rod screw 3-1-3 the shape of the formed large core rod head is 3-1-4, the countersink is 3-1-5, the formed large core rod head guide section is 3-1-6, the protruding guide section is 3-1-7, the threaded hole is 3-1-8, the large core rod positioning section is 1-9, the formed small core rod is 3-2, the small core rod head is 3-2-1, the shape of the small core rod head is 3-2-2, the small core rod connecting rod is 3-2-3, the first welding exhaust hole is 3-2-4, the second welding exhaust hole is 3-2-5, the small core rod positioning section is 3-2-6, the formed core rod upper cover is 3-3, the core rod upper cover is first positioning section difference hole is 3-3-1, the core rod upper cover is second positioning section difference hole is 3-3-2, the screw countersink is 3-3-3-3, the forming mandrel comprises a forming mandrel base 3-4, a screw hole 3-4-1, a forming mandrel base 3-4, a mandrel fixing screw 3-5, a forming upper punch 4-1, a first through hole 4-2, a second through hole 4-3, a forming lower punch 5, a third through hole 5-2, a fourth through hole 5-3 and the like.
As shown in fig. 1-14, the utility model relates to a powder metallurgy forming die for a metal gasket, which comprises a split forming female die 2, a forming core rod 3, a forming upper punch 4 and a forming lower punch 5, wherein the forming core rod 3 is arranged in a guide hole of the forming lower punch 5 in a guide fit manner; during the metal gasket forming operation, the forming mandrel 3 moves up and down to be in guide fit with the guide hole of the forming upper punch 4.
The forming female die 2 comprises an outer bushing 2-1, the bottom surface of the outer bushing 2-1 is fixedly connected with a forming female die fixing bottom plate 2-3, at least two female die core sections 2-2-1 are matched in a conical inner cavity of the outer bushing 2-1, at least two female die core sections 2-2-1 form a conical female die core 2-2, the conical female die core 2-2 is matched with the conical inner cavity of the outer bushing 2-1, the conical female die core 2-2 is limited in the conical inner cavity of the outer bushing 2-1 through the forming female die fixing bottom plate 2-3, the conical female die core 2-2 is provided with an axially through forming female die cavity 2-5, and the forming female die cavity 2-5 is consistent with the gasket outline 1-1 of the metal gasket 1. Further, in specific practice, the number of female mold core sections 2-2-1 is selected according to the product requirement, for example, in the present case, the gasket profile 1-1 of the metal gasket 1 has 4 protruding angles 1-2, and the protruding angles 1-2 at the 4 positions are equally divided, so that 4 female mold core sections 2-2 with the same size and shape as the female mold core sections 2-2-1 are arranged to form a cone body female mold core.
The outer side surface of the cone female die core 2-2 is set to be in a shape with large upper and lower directions, and the outer side surface of the cone female die core 2-2 is formed to have a cone angle of 3-12 degrees, and in specific practice, the cone angle is preferably 5-7 degrees. It should be noted that the shape cavity point 2-6 matching the protruding angle 1-2 at the 4 positions of the shape cavity of the female mold and the metal gasket 1 is aligned with the side edge joint surface of the 4 female mold core segments 2-2-1, and the shape cavity 2-5 is identical to the gasket outline 1-1 of the metal gasket 1.
The forming core rod 3 comprises a forming large core rod 3-1, a forming small core rod 3-2, a forming core rod upper cover 3-3 and a forming core rod base 3-4, wherein the forming large core rod 3-1 and the forming small core rod 3-2 are respectively fixed on the forming core rod base 3-4 through the forming core rod upper cover 3-3.
The forming upper punch 4 comprises a forming upper punch 4-1, a first through hole 4-2 and a second through hole 4-3 are arranged on the forming upper punch 4-1, the forming lower punch 5 comprises a forming lower punch 5-1, a third through hole 5-2 and a fourth through hole 5-3 are arranged on the forming lower punch 5-1, the forming large core rod 3-1 can reciprocate in the first through hole 4-2 and the third through hole 5-2, the forming small core rod 3-2 can reciprocate in the second through hole 4-3 and the fourth through hole 5-3, and the punch heads of the forming upper punch 4-1 and the forming lower punch 5-1 are consistent with the shape of the forming female die cavity 2-5.
The forming female die fixing bottom plate 2-3 is fixedly connected with the bottom surface of the outer bushing 2-1 through forming female die fixing screws 2-4.
One forming large core rod 3-1, four forming small core rods 3-2, and four forming small core rods 3-2 are circumferentially and uniformly distributed on the outer side of the forming large core rod 3-1.
The forming mandrel upper cover 3-3 is provided with a first positioning step difference hole 3-3-1 of the mandrel upper cover, a second positioning step difference hole 3-3-2 of the mandrel upper cover and a screw countersink 3-3-3. The specific setting mode is as follows: the forming core rod upper cover 3-3 is provided with a core rod upper cover first positioning step difference hole 3-3-2 which allows the forming core rod head appearance 3-1-4 arranged by the forming core rod 3-1-1 and is matched with the forming core rod positioning section 3-1-9, a core rod upper cover second positioning step difference hole 3-3-2 which allows the forming core rod head appearance 3-2 and is matched with the forming core rod positioning section 3-2-6 to pass through at the positions of the forming core rod upper cover first positioning step difference holes 3-3-1 and 4, and screw countersinks 3-3-3 which are equally distributed at the positions of 4 are arranged at the periphery.
The forming large core rod 3-1 comprises a forming core rod connecting rod 3-1-2, the forming large core rod head 3-1-1 is fixedly connected to the upper end of the forming core rod connecting rod 3-1-2 through a forming large core rod locking screw 3-1-3, a large core rod positioning section 3-1-9 is constructed at the lower end of the forming core rod connecting rod 3-1-2, the forming large core rod 3-1 penetrates through a first positioning section difference hole 3-3-1 of the core rod upper cover, and the large core rod positioning section 3-1-9 is matched with the first positioning section difference hole 3-3-1 of the core rod upper cover.
The forming small core rod 3-2 comprises a small core rod connecting rod 3-2-3 and a small core rod head 3-2-1 fixedly connected with the small core rod connecting rod 3-2-3, a first welding vent hole 3-2-4 and a second welding vent hole 3-2-5 which are mutually communicated are arranged on the small core rod connecting rod 3-2-3, the upper end of the first welding vent hole 3-2-4 extends to the bottom surface of the small core rod head 3-2-1, the outer end of the second welding vent hole 3-2-5 extends to the surface of the small core rod connecting rod 3-2-3, a small core rod positioning section 3-2-6 is constructed at the lower end of the small core rod connecting rod 3-2-3, the forming small core rod 3-2 penetrates through the second positioning section difference hole 3-3-2 of the upper cover of the core rod, and the small core rod positioning section 3-2-6 is matched with the second positioning section difference hole 3-3-2 of the upper cover of the core rod. Through the arrangement of the first welding vent holes 3-2-4 and the second welding vent holes 3-2-5 which are mutually communicated, gas can be discharged from the through air holes when the small core rod head 3-2-1) and the small core rod connecting rod 3-2-3 are welded, so that welding is more compact, and the core rod is prevented from being broken when a product is taken out of a die.
The screw countersinks 3-3-3 are aligned with the screw holes 3-4-1 on the shaped mandrel base 3-4 and are securely connected by the mandrel set screws 3-5.
The lower end of the formed large core rod head 3-1-1 is constructed into a formed large core rod head guide section 3-1-6, the upper end of the formed core rod connecting rod 3-1-2 is constructed into a protruding guide section 3-1-7, and the formed large core rod head guide section 3-1-6 is matched with the protruding guide section 3-1-7.
As shown in fig. 1 to 14, the specific implementation mode of the product of the utility model in operation is as follows: the forming mandrel 3 is first fixed to the machine during the whole assembly.
The third through hole 5-2 and the fourth through hole 5-3 arranged in the molding undershoot 5 are respectively slid into the molding core rod 3 from top to bottom after passing through the molding large core rod 3-1 and 4 molding small core rods 3-2, and are installed and fixed on a machine.
The forming female die cavity 2-5 arranged in the forming female die 2 is aligned with the lower punch 5-1 arranged in the lower punch 4, sleeved from top to bottom and then fixed on the machine equipment, and the machine is adjusted to the powder filling position.
The forming upper punch 4-1 arranged on the forming upper punch 4 faces downwards and is aligned with the forming female die cavity 2-5 arranged in the forming female die 2, and the first through hole 4-2 and the second through hole 4-3 can be confirmed to smoothly enter the forming large core rod 3-1 and the 4 forming small core rods 3-2, then are sleeved into the forming female die cavity 2-5 from top to bottom, and are fixed on a machine.
The cone female die core 2-2 consists of female die core halves 2-2-1.
In the production process, the forming upper punch and the forming lower punch apply pressure through a machine table to press the product to meet the designed density requirement, at the moment, the conical female die core 2-2 is divided into 4 female die core halves 2-2-1 in the manufacturing process, and the stress born by the conical female die core 2-2 is directly dispersed from a joint, so that the problem of die core cracking caused by standing concentration is solved. And greatly reduces the problem that the mold is damaged and needs to be manufactured again. Thereby greatly reducing the production cost.
Claims (6)
1. A powder metallurgy forming die of a metal gasket is characterized in that: the forming die comprises a split forming die (2), a forming mandrel (3), a forming upper punch (4) and a forming lower punch (5), wherein the forming mandrel (3) is arranged in a guide hole of the forming lower punch (5) in a guide fit manner; during metal gasket forming operation, the forming core rod (3) moves up and down to be matched with a guide hole of the forming upper punch (4) in a guiding way;
the forming female die (2) comprises an outer lining (2-1), the bottom surface of the outer lining (2-1) is fixedly connected with a forming female die fixing bottom plate (2-3), at least two female die core halves (2-2-1) are matched in a conical inner cavity of the outer lining (2-1), at least two female die core halves (2-2-1) form a conical female die core (2-2), the conical female die core (2-2) is matched with the conical inner cavity of the outer lining (2-1), the conical female die core (2-2) is limited in the conical inner cavity of the outer lining (2-1) through the forming female die fixing bottom plate (2-3), the conical female die core (2-2) is provided with an axially through forming female die cavity (2-5), and the forming female die cavity (2-5) is consistent with a gasket outline (1-1) of the metal gasket (1);
the forming core rod (3) comprises a forming large core rod (3-1), a forming small core rod (3-2), a forming core rod upper cover (3-3) and a forming core rod base (3-4), wherein the forming large core rod (3-1) and the forming small core rod (3-2) are fixed on the forming core rod base (3-4) through the forming core rod upper cover (3-3) respectively;
the forming upper punch (4) comprises a forming upper punch head (4-1), a first through hole (4-2) and a second through hole (4-3) are formed in the forming upper punch head (4-1), the forming lower punch (5) comprises a forming lower punch head (5-1), a third through hole (5-2) and a fourth through hole (5-3) are formed in the forming lower punch head (5-1), the forming large core rod (3-1) can reciprocate in the first through hole (4-2) and the third through hole (5-2), the forming small core rod (3-2) can reciprocate in the second through hole (4-3) and the fourth through hole (5-3), and the punch parts of the forming upper punch head (4-1) and the forming lower punch head (5-1) are consistent with the shape of the female die of the forming cavity (2-5).
2. The powder metallurgy forming die for a metal gasket according to claim 1, wherein: the forming female die fixing bottom plate (2-3) is fixedly connected with the bottom surface of the outer lining sleeve (2-1) through a forming female die fixing screw (2-4).
3. The powder metallurgy forming die for a metal gasket according to claim 1, wherein: the outer side surface of the cone female die core (2-2) is in a shape with large upper and lower parts, and the outer side surface of the cone female die core (2-2) is provided with a cone angle of 3-12 degrees.
4. The powder metallurgy forming die for a metal gasket according to claim 1, wherein: one forming large core rod (3-1) is arranged, four forming small core rods (3-2) are arranged, and the four forming small core rods (3-2) are circumferentially and uniformly distributed on the outer side of the forming large core rod (3-1).
5. The powder metallurgy forming die for a metal gasket according to claim 1, wherein: the forming mandrel upper cover (3-3) is provided with a first positioning step difference hole (3-3-1) of the mandrel upper cover, a second positioning step difference hole (3-3-2) of the mandrel upper cover and a screw countersink (3-3-3);
the large forming core rod (3-1) comprises a large forming core rod connecting rod (3-1-2), the large forming core rod head (3-1-1) is fixedly connected to the upper end of the large forming core rod connecting rod (3-1-2) through a large forming core rod locking screw (3-1-3), a large forming core rod positioning section (3-1-9) is formed at the lower end of the large forming core rod connecting rod (3-1-2), the large forming core rod (3-1) penetrates through a first positioning section difference hole (3-3-1) of the core rod upper cover, and the large forming core rod positioning section (3-1-9) is matched with the first positioning section difference hole (3-3-1) of the core rod upper cover;
the forming small core rod (3-2) comprises a small core rod connecting rod (3-2-3) and a small core rod head (3-2-1) fixedly connected with the small core rod connecting rod (3-2-3), a first welding vent hole (3-2-4) and a second welding vent hole (3-2-5) which are mutually communicated are arranged on the small core rod connecting rod (3-2-3), the upper end of the first welding vent hole (3-2-4) extends to the bottom surface of the small core rod head (3-2-1), the outer end of the second welding vent hole (3-2-5) extends to the surface of the small core rod connecting rod (3-2-3), a small core rod positioning section (3-2-6) is formed at the lower end of the small core rod connecting rod (3-2-3), the forming small core rod (3-2) penetrates through a second positioning section difference hole (3-3-2) of the upper cover of the core rod, and the small core rod positioning section (3-2-6) is matched with the second positioning section difference hole (3-3-2) of the upper cover;
the screw countersink (3-3-3) is aligned with the screw tooth hole (3-4-1) on the forming mandrel base (3-4) and is fastened and connected through the mandrel fixing screw (3-5).
6. The powder metallurgy forming die for a metal gasket according to claim 5, wherein: the lower end of the forming large core rod head (3-1-1) is provided with a forming large core rod head guide section (3-1-6), the upper end of the forming core rod connecting rod (3-1-2) is provided with a protruding guide section (3-1-7), and the forming large core rod head guide section (3-1-6) is matched with the protruding guide section (3-1-7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320922492.4U CN219900251U (en) | 2023-04-23 | 2023-04-23 | Powder metallurgy forming die for metal gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320922492.4U CN219900251U (en) | 2023-04-23 | 2023-04-23 | Powder metallurgy forming die for metal gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219900251U true CN219900251U (en) | 2023-10-27 |
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ID=88424541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320922492.4U Active CN219900251U (en) | 2023-04-23 | 2023-04-23 | Powder metallurgy forming die for metal gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219900251U (en) |
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- 2023-04-23 CN CN202320922492.4U patent/CN219900251U/en active Active
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