CN216729382U - Die forging die for connecting rod of large internal combustion engine - Google Patents
Die forging die for connecting rod of large internal combustion engine Download PDFInfo
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- CN216729382U CN216729382U CN202123385883.7U CN202123385883U CN216729382U CN 216729382 U CN216729382 U CN 216729382U CN 202123385883 U CN202123385883 U CN 202123385883U CN 216729382 U CN216729382 U CN 216729382U
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Abstract
The utility model relates to a die forging die for a large internal combustion engine connecting rod, which comprises an upper die fixedly arranged at the bottom of an upper base plate of a hydraulic machine and a lower die arranged at the top of a lower base plate of the hydraulic machine, wherein the upper die and the lower die correspond up and down; the lower die cavity is internally provided with two first material returning holes which are communicated up and down and arranged side by side in the left and right directions, one first material returning hole is positioned at a shaft hole forming boss for forming a shaft hole on a forge piece in the lower die cavity, the first material returning hole is offset at the center of the top of the shaft hole forming boss, and an ejector rod matched with the first material returning hole in an embedded mode is arranged in the first material returning hole. The die forging die for the connecting rod of the large internal combustion engine can realize the forging processing of the large connecting rod, the yield of the forged piece is high, the die forging die is flexible in material returning, the forging process is simple, the operation is flexible, and the processing efficiency of the forged piece is improved.
Description
Technical Field
The utility model relates to the field of machining of connecting rods of large internal combustion engines, in particular to a die forging die for connecting rods of large internal combustion engines.
Background
A crank connecting rod mechanism in the internal combustion engine is an important component for realizing the working cycle and finishing energy conversion of the engine, and a connecting rod in the crank connecting rod mechanism is an important component for connecting a piston and a crankshaft.
The existing connecting rod of the internal combustion engine is formed by forging and machining. However, machining can only process a connecting rod having a relatively small structure, and the machining cost is relatively high because the machining allowance is relatively large. The forging processing is more flexible, the later-stage processing allowance is small, and the processing cost is lower, so the forging processing is most widely used.
Due to different sizes of the internal combustion engines, for some large internal combustion engines, such as internal combustion engines for ships, the connecting rod has very large size, the conventional forging and forming effect is not obvious, metal is difficult to fill a die cavity during die forging, multi-fire die forging is needed, the processing efficiency is low, and the die is inconvenient to return materials.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a die forging die for a large internal combustion engine connecting rod, which has good forming effect and is convenient to return materials after die forging.
In order to solve the technical problems, the utility model is realized by the following technical scheme: a die forging die for a large internal combustion engine connecting rod comprises an upper die fixedly arranged at the bottom of an upper base plate of a hydraulic press and a lower die arranged at the top of a lower base plate of the hydraulic press, wherein the upper die and the lower die correspond up and down; the lower die cavity is internally provided with two first material returning holes which are communicated up and down and arranged side by side in the left and right directions, one first material returning hole is positioned at a shaft hole forming boss for forming a shaft hole on a forge piece in the lower die cavity, the first material returning hole is offset at the center of the top of the shaft hole forming boss, and an ejector rod matched with the first material returning hole in an embedded mode is arranged in the first material returning hole.
Further, the top of the lower backing plate is provided with a cavity, the lower die is erected right above the cavity, the lower end of the ejector rod extends downwards into the cavity, a top plate which vertically corresponds to the bottom of the ejector rod is arranged in the cavity, a second material returning hole which is vertically communicated with the bottom of the lower backing plate is formed in the bottom of the cavity, and the top of the second material returning hole vertically corresponds to the bottom of the top plate.
Furthermore, the second material returning holes are at least two and are arranged in parallel from left to right.
Further, a distance is reserved between the bottom of the ejector rod and the top of the top plate, and the vertical height h of the distance is 10 mm.
Furthermore, a plurality of inwards concave detection grooves are formed in the upper die cavity, the end faces of the detection grooves are of circular structures, and the detection grooves are arranged in parallel along the length direction of the upper die cavity.
Compared with the prior art, the utility model has the advantages that: the die forging die for the connecting rod of the large internal combustion engine can realize the forging processing of the large connecting rod, the yield of the forged piece is high, the die forging die is flexible in material returning, the forging process is simple, the operation is flexible, and the processing efficiency of the forged piece is improved.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a connecting rod die forging die for a large internal combustion engine according to the utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural diagram of an upper die of a connecting rod die forging die for a large internal combustion engine according to the utility model;
FIG. 4 is a schematic view of the lower die structure of a connecting rod die forging die for a large internal combustion engine according to the present invention;
FIG. 5 is a schematic view of the billet construction of the present invention;
FIG. 6 is a schematic view of the forging structure of the present invention.
In the figure: 1. an upper die; 11. an upper mold cavity; 12. inspecting the groove; 2. a lower die; 21. a lower die cavity; 22. a first material returning hole; 23. forming a boss in the shaft hole; 24. a lower guide hole; 3. an upper base plate; 4. a lower base plate; 41. a second material returning hole; 5. a top plate; 6. a top rod; 7. a concave cavity; 8. blanking; 9. forging; 91. and the shaft hole.
The specific implementation mode is as follows:
the utility model is described in detail below with reference to the figures and the detailed description.
Fig. 1, 3 and 4 show a die forging die for connecting rods of a large internal combustion engine, which comprises an upper die 1 fixedly arranged at the bottom of an upper backing plate 3 of a hydraulic machine and a lower die 2 arranged at the top of a lower backing plate 4 of the hydraulic machine, wherein the upper die 1 and the lower die 2 correspond to each other up and down, an upper die cavity 11 is arranged at the bottom of the upper die 1, a lower die cavity 21 is arranged at the top of the lower die 2, and the upper die cavity 11 and the lower die cavity 21 are symmetrical up and down; the lower die cavity 21 is internally provided with first material returning holes 22 which are communicated up and down, the first material returning holes 22 are provided with two parts which are arranged side by side from left to right, one first material returning hole 22 is positioned in the lower die cavity 21 and used for forming a shaft hole forming boss 23 of a shaft hole 91 on a forge piece 9, the first material returning hole 22 is offset at the top center of the shaft hole forming boss 23, the jacking rod 6 in the first material returning hole 22 can be prevented from being jacked out during material returning, and the jacking rod 6 matched with the first material returning hole in an embedded mode is arranged in the first material returning hole 22.
In order to facilitate the material returning of the material returning mechanism to balance the action of the two ejector rods 6, the cavity 7 is arranged at the top of the lower base plate 4, the lower die 2 is erected right above the cavity 7, the lower ends of the ejector rods 6 extend downwards into the cavity 7, the top plate 5 vertically corresponding to the bottoms of the ejector rods 6 is arranged in the cavity 7, the bottom of the cavity 7 is provided with a second material returning hole 41 vertically communicated with the bottom of the lower base plate 4, and the top of the second material returning hole 41 vertically corresponds to the bottom of the top plate 5.
In order to ensure the balance when the top plate 5 is pushed upwards, at least two second material returning holes 41 are arranged in parallel from left to right.
In order to prevent the interference between the bottom of the ejector pin 6 and the top plate 5 when the ejector pin is subjected to a force during swaging, as shown in fig. 2, a gap is provided between the bottom of the ejector pin 6 and the top of the top plate 5, and the vertical height h of the gap is 10 mm.
In order to form a detection boss on the forged piece 9 and facilitate detection of the forged piece 9, a plurality of concave detection grooves 13 are arranged in the upper die cavity 11, and the end faces of the detection grooves 13 are of circular structures and are arranged in parallel along the length direction of the upper die cavity 11.
The working principle of the die forging die is as follows: placing a fired rough blank 8 (see the attached drawing 5 of the specification for details) or a fired forged piece 9 (see the attached drawing 6 of the specification for details) in a lower die cavity 21 of a lower die 2, starting a hydraulic machine, driving an upper die 1 to move downwards synchronously by an upper backing plate of the hydraulic machine, enabling an upper die cavity 11 at the bottom of the upper die 1 to be folded with the rough blank 8 or the forged piece 9 in the lower die cavity 21 and extruding the rough blank 8 or the forged piece 9 to enable metal to fill the upper die cavity 11 and the lower die cavity 21, driving the upper backing plate 3 to drive the upper die 1 to reset upwards by the hydraulic machine after die forging is finished, separating the formed forged piece 9, then jacking a material jacking cylinder arranged below a lower backing plate 4 to jack upwards along a corresponding second material jacking hole 41 through a piston rod and pushing a top plate 5 to move upwards, driving an ejector rod 6 at the top of the top plate 5 to move upwards under the action of force, and jacking the forged piece positioned in the lower die cavity 21 through the ejector rod 6.
The die forging die for the connecting rod of the large internal combustion engine can realize the forging processing of the large connecting rod, the yield of the forged piece is high, the die forging die is flexible in material returning, the forging process is simple, the operation is flexible, and the processing efficiency of the forged piece is improved.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (5)
1. A die forging die for a large internal combustion engine connecting rod is characterized by comprising an upper die (1) fixedly arranged at the bottom of an upper backing plate (3) of a hydraulic machine and a lower die (2) arranged at the top of a lower backing plate (4) of the hydraulic machine, wherein the upper die (1) and the lower die (2) correspond up and down, an upper die cavity (11) is arranged at the bottom of the upper die (1), a lower die cavity (21) is arranged at the top of the lower die (2), and the upper die cavity (11) and the lower die cavity (21) are vertically symmetrical; lower die cavity (21) is provided with first material returned hole (22) of intercommunication from top to bottom, first material returned hole (22) have two, control and set up side by side, and one of them first material returned hole (22) is located lower die cavity (21) and is used for shaft hole (91) fashioned shaft hole shaping boss (23) department on forging (9), and this first material returned hole (22) biasing is at the top center of shaft hole shaping boss (23), be provided with in first material returned hole (22) rather than embedded complex ejector pin (6).
2. The die forging die for the connecting rod of the large internal combustion engine according to claim 1, wherein a concave cavity (7) is formed in the top of the lower backing plate (4), the lower die (2) is erected directly above the concave cavity (7), the lower end of the ejector rod (6) extends downwards into the concave cavity (7), a top plate (5) which vertically corresponds to the bottom of the ejector rod (6) is arranged in the concave cavity (7), a second material returning hole (41) which is vertically communicated with the bottom of the lower backing plate (4) is formed in the bottom of the concave cavity (7), and the top of the second material returning hole (41) vertically corresponds to the bottom of the top plate (5).
3. The die forging die for the connecting rod of the large internal combustion engine according to claim 2, wherein the number of the second material ejection holes (41) is at least two, and the second material ejection holes are arranged in parallel in the left and right direction.
4. The die forging die for the connecting rod of the large internal combustion engine according to claim 2, wherein a space is formed between the bottom of the ejector rod (6) and the top of the top plate (5), and the vertical height h of the space is 10 mm.
5. The die forging die for the connecting rod of the large internal combustion engine as claimed in claim 1, wherein a plurality of concave checking grooves (13) are formed in the upper die cavity (11), and the end faces of the checking grooves (13) are of a circular structure and are arranged in parallel along the length direction of the upper die cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385883.7U CN216729382U (en) | 2021-12-30 | 2021-12-30 | Die forging die for connecting rod of large internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385883.7U CN216729382U (en) | 2021-12-30 | 2021-12-30 | Die forging die for connecting rod of large internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN216729382U true CN216729382U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123385883.7U Active CN216729382U (en) | 2021-12-30 | 2021-12-30 | Die forging die for connecting rod of large internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346160A (en) * | 2021-12-30 | 2022-04-15 | 苏州昆仑重型装备制造有限公司 | Forging process for connecting rod of large internal combustion engine and die forging die thereof |
-
2021
- 2021-12-30 CN CN202123385883.7U patent/CN216729382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346160A (en) * | 2021-12-30 | 2022-04-15 | 苏州昆仑重型装备制造有限公司 | Forging process for connecting rod of large internal combustion engine and die forging die thereof |
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