CN110935835A - Forging die structure for deep-cavity thin-wall forge piece - Google Patents
Forging die structure for deep-cavity thin-wall forge piece Download PDFInfo
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- CN110935835A CN110935835A CN201911351395.9A CN201911351395A CN110935835A CN 110935835 A CN110935835 A CN 110935835A CN 201911351395 A CN201911351395 A CN 201911351395A CN 110935835 A CN110935835 A CN 110935835A
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- die
- cavity
- forging
- wall
- deep
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a forging die structure for a deep-cavity thin-wall forge piece, which comprises an upper die, a lower die and an ejector rod, wherein a die cavity is formed in the lower die, a lower die core is arranged at the bottom of the die cavity, an ejector rod assembling hole is formed in the center of the lower die core, the ejector rod comprises a head end and a rod part, and the rod part is inserted into the ejector rod assembling hole. The forging die structure for the deep-cavity thin-wall forge piece is characterized in that the forging die structure divides a die into a plurality of blocks to be designed in a split mode in an area where stress is most concentrated, and the die structure is assembled, so that stress concentration zones of the die are eliminated, and various working condition performances of the die are improved. The structure is simple, and the realization is easy; and the stress concentration area in the production process of the die is eliminated, so that the service life of the die is prolonged, and the die repairing cost in the use process of the die is reduced.
Description
Technical Field
The invention relates to a forging die, in particular to a forging die structure for a deep-cavity thin-wall forging piece.
Background
With the continuous development of forging technology, the demand of high-performance and low-cost die forgings is increasing day by day. The screw press is one of the mainstream die forging production devices, and can produce forgings of various materials and structures. The screw press has the double working characteristics of the die forging hammer and the forging press, and is particularly suitable for producing deep-cavity thin-wall forgings such as cylinders, flanges, end sockets, fixing bodies and the like. When designing the die of the forging, the problem of absorbing redundant energy during forging needs to be fully considered. When the material flows to the deepest part of the die cavity, the die cavity is basically filled, when striking is carried out again, most of kinetic energy of the sliding block is absorbed by elastic deformation of the die and the equipment, the inner diameter of the die is expanded along with further compression of the blank, the die bears great stress, when a certain number of forgings are produced, the region where the stress of the die is concentrated is easy to crack, and the region is mostly the deepest switching part of the die cavity. Once such a cracking phenomenon occurs, the production of repair molds is suspended with less cracking, and such molds are difficult and costly to repair. The severe cracking directly results in the die being scrapped. Not only influence the quality of forging, production efficiency and lead time all can receive very big influence simultaneously.
Disclosure of Invention
The invention aims to provide a forging die structure for a deep-cavity thin-wall forging piece, which aims to solve the problem that a forging die for the deep-cavity thin-wall forging piece in the prior art is easy to crack due to stress concentration.
In order to achieve the purpose, the invention adopts the following technical scheme:
the forging die structure for the deep-cavity thin-wall forge piece comprises an upper die, a lower die and an ejector rod, wherein a die cavity is formed in the lower die, the bottom of the die cavity is provided with the lower die core, the center of the lower die core is provided with an ejector rod assembling hole, the ejector rod comprises a head end and a rod portion, and the rod portion is inserted into the ejector rod assembling hole.
Particularly, the bottom of the die cavity is provided with a step hole, a step part matched with the step hole is arranged on the lower die core, and the lower die core is limited by the step surface.
Particularly, the bottom surface of the head end is arranged to be clung to the end surface of the lower die core.
In particular, the head end is spaced from an inner wall of the mold cavity.
Compared with the prior art, the lower die part of the forging die structure for the deep-cavity thin-wall forge piece adopts a split structure design, so that the forging die structure is simple in structure and easy to realize; and the stress concentration area in the production process of the die is eliminated, so that the service life of the die is prolonged, and the die repairing cost in the use process of the die is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a forging die structure for a deep-cavity thin-wall forging piece, provided by the embodiment of the invention.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a forging die structure for a deep cavity thin-wall forging according to an embodiment of the present invention.
In this embodiment, a forging die structure for deep cavity thin wall class forging includes mould 1, lower mould 2 and ejector pin 3, die cavity 4 has been seted up on lower mould 2, the bottom of die cavity 4 is provided with lower mould mold core 5, the bottom of die cavity 4 is provided with step hole 6, be provided with step portion 7 that cooperation step hole set up on the lower mould mold core 5, it is spacing to face lower mould mold core 5 through the step, ejector pin pilot hole 8 has been seted up to the center department of lower mould mold core 5, ejector pin 3 includes head end 30 and pole portion 31, pole portion 31 inserts in the ejector pin pilot hole 8.
The bottom surface of the head end 30 is tightly attached to the end surface of the lower die mold core 5, a gap is formed between the head end 30 and the inner wall of the mold cavity 4, and after the upper die 1 and the lower die 2 are closed, the upper die 1, the mold cavity 4, the end surface of the lower die mold core 5 and the head end 30 form a mold cavity for forging a blank.
The forging die structure for the deep-cavity thin-wall forge piece is actually a combined die, the region where the stress of the die is most concentrated, namely the region of the ejector rod 3 in the die cavity 4, is fully considered in the die design process, the die is divided into a plurality of small blocks from the region, and finally the combined design is carried out, so that the stress concentration region in the die production process is eliminated, the service life of the die is prolonged, and the die repairing cost in the die using process is reduced.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the invention, which are intended to be within the scope of the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The forging die structure for the deep-cavity thin-wall forge piece comprises an upper die, a lower die and an ejector rod, wherein a die cavity is formed in the lower die, the forging die structure is characterized in that the bottom of the die cavity is provided with the lower die core, an ejector rod assembling hole is formed in the center of the lower die core, the ejector rod comprises a head end and a rod portion, and the rod portion is inserted into the ejector rod assembling hole.
2. A forging die structure for a deep-cavity thin-wall forging according to claim 1, wherein a step hole is formed in the bottom of the die cavity, a step portion matched with the step hole is formed in the lower die core, and the lower die core is limited through the step surface.
3. A forging die structure for a deep-cavity thin-wall forging according to claim 1, wherein the bottom surface of the head end is closely attached to the end surface of the lower die core.
4. A die structure for a deep-cavity thin-wall type forging according to any one of claims 1 to 3, wherein the head end is spaced from the inner wall of the die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911351395.9A CN110935835A (en) | 2019-12-24 | 2019-12-24 | Forging die structure for deep-cavity thin-wall forge piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911351395.9A CN110935835A (en) | 2019-12-24 | 2019-12-24 | Forging die structure for deep-cavity thin-wall forge piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110935835A true CN110935835A (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911351395.9A Pending CN110935835A (en) | 2019-12-24 | 2019-12-24 | Forging die structure for deep-cavity thin-wall forge piece |
Country Status (1)
| Country | Link |
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| CN (1) | CN110935835A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951534A (en) * | 2021-12-28 | 2022-08-30 | 无锡透平叶片有限公司 | Split double-pier-head blank making die applied to screw press |
-
2019
- 2019-12-24 CN CN201911351395.9A patent/CN110935835A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951534A (en) * | 2021-12-28 | 2022-08-30 | 无锡透平叶片有限公司 | Split double-pier-head blank making die applied to screw press |
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