CN108971400B - Method for producing titanium alloy special-shaped forge piece by using free forging equipment - Google Patents
Method for producing titanium alloy special-shaped forge piece by using free forging equipment Download PDFInfo
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- CN108971400B CN108971400B CN201811186343.6A CN201811186343A CN108971400B CN 108971400 B CN108971400 B CN 108971400B CN 201811186343 A CN201811186343 A CN 201811186343A CN 108971400 B CN108971400 B CN 108971400B
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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
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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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
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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
- B21J13/085—Accessories for handling work or tools handling of tools
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Abstract
The invention discloses a method for producing a titanium alloy special-shaped forge piece by using free forging equipment, which comprises the steps of material feeding weight calculation, tool design, blank preparation, preforming, molding and the like. The invention utilizes the existing free forging equipment to produce the special-shaped forge piece, only needs to manufacture a simple forging die and demoulding equipment, so the invention has the advantages of low development cost, short period, less one-time investment, low technical requirement and low technical requirement, and is suitable for the production of die forge pieces in the development stage and the production of small-batch die forge pieces.
Description
Technical Field
The invention relates to a method for producing a titanium alloy special-shaped forging by using free forging equipment, belonging to the technical field of titanium alloy forging.
Background
The titanium alloy has the advantages of high strength, high temperature resistance, corrosion resistance and the like, and is widely applied to the fields of aerospace, aviation, ships and the like. For common titanium alloy forgings, the production process is mature, the performance index requirements of aerospace special-shaped forgings (such as hubs and the like) are strict, the forging process is complex, large die forging equipment is generally adopted for die forging forming, however, the die forging tooling cost investment is large, about hundreds of thousands to hundreds of thousands, the technical requirement is high, and the titanium alloy forging is not beneficial to the early development work. Although the method can also be used for directly machining and forming a simpler special-shaped forging piece in a machining mode, the special-shaped forging piece is machined, so that the material loss is large in the machining process, and the cost is high.
Therefore, a method with low cost, low material loss and low technical requirement is urgently needed to forge qualified titanium alloy special-shaped forgings.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a method for producing a titanium alloy special-shaped forging by using the existing free forging equipment so as to reduce the cost.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for producing a titanium alloy special-shaped forging by using free forging equipment comprises the following steps:
(1) calculating the weight of fed materials: according to the volume of the forging stock before machining, calculating the weight of the forging stock before machining, namely the weight of the material stock, namely the feeding weight;
(2) tool design: designing a forging die according to the size of a forging blank, wherein the forging die comprises an upper die and a lower die, the upper die is a male die, a cavity of the lower die is formed by vertically stacking two circular truncated cones with different diameters, the diameter of the bottom of the cavity of the lower die is consistent with the outer diameter of the bottom of a forged piece before machining, demoulding is convenient, and the demoulding angle of the upper die and the lower die is about 7 degrees;
(3) preparing a blank: calculating the height of the blank according to the feeding weight to obtain the specification of the blank, and then preparing the qualified blank by using free forging equipment;
(4) preforming: placing the lower die on a lower anvil of the free forging equipment, and clamping the upper die for later use by an operating machine of the free forging equipment; then putting the heated blank into a lower die; placing the upper die on the blank, and centering; pressing the upper die down for 1/5-1/4 strokes, then directly taking out the upper die by lifting the operating machine, clamping the lower die by the operating machine, turning over for 180 degrees, and directly dropping the blank from the lower die to obtain a preformed blank;
(5) molding: and placing the lower die on a lower anvil of the free forging equipment again, clamping the upper die for standby by using an operating machine of the free forging equipment, placing the preformed blank into the lower die, placing the upper die on the blank, paying attention to centering, pressing the upper die in place to obtain the formed forge piece, clamping the upper die by using the operating machine to lift, separating the forge piece from the lower die, and separating the forge piece from the upper die by using the simple demolding tool.
Compared with the prior art, the invention has the beneficial effects that: the existing free forging equipment is used for producing the special-shaped forge piece, and only a simple forging die and simple demoulding equipment are needed, so that the method is low in development cost, short in period, low in one-time investment, low in technical requirement and technical requirement, and suitable for production of die forge pieces in the development stage and production of small-batch die forge pieces.
Drawings
FIG. 1 is a schematic drawing of a forging to which the present invention relates, wherein the portion enclosed by solid lines is a forged piece after machining, and the portion enclosed by dotted lines is a forged blank before machining;
FIG. 2 is a schematic view of an upper die according to the present invention;
FIG. 3 is a schematic view of a lower mold according to the present invention.
Detailed Description
The invention will now be further elucidated with reference to the drawing.
Example one
As shown in fig. 1 to 3, the method for producing a titanium alloy special-shaped forging by using a free forging device of the embodiment includes the following steps:
(1) calculating the weight of fed materials: according to the volume of the forging stock before machine adding, namely the volume contained by a red dotted line in figure 1, the weight M of the forging stock before machine adding, namely the feeding weight M is calculated;
(2) tool design: designing a forging die according to the size of a machined front forging, namely a blank, wherein the forging die comprises an upper die and a lower die, the upper die is a male die, a cavity of the lower die is formed by vertically stacking two circular truncated cones with different diameters, the bottom diameter phi D of the cavity of the lower die is consistent with the bottom outer diameter phi D of the machined front forging, and the draft angle designed by the upper die and the lower die is about 7 degrees for convenience of demolding;
(3) preparing a blank: calculating the height H of the blank according to the feeding weight M to obtain the specification phi D multiplied by H of the blank, and then preparing the qualified blank by free forging equipment;
(4) preforming: placing the lower die on a lower anvil of the free forging equipment, and clamping the upper die for later use by an operating machine of the free forging equipment; then putting the heated blank into a lower die; placing the upper die on the blank, and centering; then, the upper die is pressed down for about 1/5-1/4 strokes (the depth of an inner hole of the preformed blank is only 1/5-1/4 of the actual depth), then the upper die is directly taken out by utilizing the lifting of an operating machine, the operating machine is used for clamping the lower die to turn over for 180 degrees, and the blank directly falls off from the lower die to obtain the preformed blank;
(5) molding: placing the lower die on a lower anvil of the free forging equipment again, clamping the upper die for standby by using an operating machine of the free forging equipment, placing the preformed and reheated blank into the lower die, placing the upper die on the blank, taking attention to centering, and pressing the upper die in place, namely, basically coinciding the plane A of the upper die with the plane B of the lower die to obtain a formed forging;
(6) demolding: due to the design of the demoulding angle, the preforming process and the use of a proper lubricant during forming, the forge piece is easily separated from the mould by clamping of two operating machines of the free forging equipment.
Claims (1)
1. A method for producing a titanium alloy special-shaped forging by using free forging equipment is characterized by comprising the following steps:
(1) calculating the weight of fed materials: according to the volume of the forging stock before machining, calculating the weight of the forging stock before machining, namely the weight of the material stock, namely the feeding weight;
(2) tool design: designing a forging die according to the size of a forging blank, wherein the forging die comprises an upper die and a lower die, the upper die is a male die, a cavity of the lower die is formed by vertically stacking two circular truncated cones with different diameters, the diameter of the bottom of the cavity of the lower die is consistent with the outer diameter of the bottom of a forged piece before machining, demoulding is convenient, and the demoulding angle of the upper die and the lower die is 7 degrees;
(3) preparing a blank: calculating the height of the blank according to the feeding weight to obtain the specification of the blank, and then preparing the qualified blank by using free forging equipment;
(4) preforming: placing the lower die on a lower anvil of the free forging equipment, and clamping the upper die for later use by an operating machine of the free forging equipment; then putting the heated blank into a lower die; placing the upper die on the blank, and centering; pressing the upper die down for 1/5-1/4 strokes, then directly taking out the upper die by lifting the operating machine, clamping the lower die by the operating machine, turning over for 180 degrees, and directly dropping the blank from the lower die to obtain a preformed blank;
(5) molding: and placing the lower die on a lower anvil of the free forging equipment again, clamping the upper die for standby by using an operating machine of the free forging equipment, placing the preformed blank into the lower die, placing the upper die on the blank, paying attention to centering, pressing the upper die in place to obtain the formed forge piece, clamping the upper die by using the operating machine to lift, separating the forge piece from the lower die, and separating the forge piece from the upper die by using the simple demolding tool.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811186343.6A CN108971400B (en) | 2018-10-12 | 2018-10-12 | Method for producing titanium alloy special-shaped forge piece by using free forging equipment |
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| CN201811186343.6A CN108971400B (en) | 2018-10-12 | 2018-10-12 | Method for producing titanium alloy special-shaped forge piece by using free forging equipment |
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| CN108971400A CN108971400A (en) | 2018-12-11 |
| CN108971400B true CN108971400B (en) | 2020-02-11 |
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| CN112275979B (en) * | 2020-10-09 | 2022-05-27 | 中国航发北京航空材料研究院 | Free forging blank-making forming control method for multi-groove special-shaped forging |
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| JPS613627A (en) * | 1984-06-15 | 1986-01-09 | Kobe Steel Ltd | Manufacture of automobile wheel |
| CZ296062B6 (en) * | 1999-09-21 | 2006-01-11 | Device for closed-die forging of forgings with internal flash | |
| RU2344898C2 (en) * | 2007-01-09 | 2009-01-27 | Открытое акционерное общество "КАМАЗ-Металлургия" | Method for manufacture of hollow forged piece with offset |
| CN102107255B (en) * | 2010-12-20 | 2012-11-14 | 沈阳黎明航空发动机(集团)有限责任公司 | Die forging forming method of basin-shaped blank |
| CN104624890B (en) * | 2014-12-03 | 2017-01-18 | 鞍钢重型机械有限责任公司 | Forging method for lifting ring forged part |
| CN105170865B (en) * | 2015-10-09 | 2017-06-13 | 大连理工大学 | A kind of crystal grain control method of explosive valve GH690 alloys shearing lid |
| CN105750469B (en) * | 2016-05-12 | 2018-10-16 | 中车戚墅堰机车车辆工艺研究所有限公司 | One discharge plate forging forging mold and forging method |
| CN107186139B (en) * | 2017-07-21 | 2018-09-18 | 贵州航天新力铸锻有限责任公司 | The H profile steel manufacturing method of nuclear fusion stack magnet support |
| CN207723402U (en) * | 2017-12-13 | 2018-08-14 | 陕西宏远航空锻造有限责任公司 | A kind of forging mold of large titanium alloy casing class forging part |
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Address after: No. 97, Qianming Road, Qingshan Community, Deshan Street, Changde Economic and Technological Development Zone, Changde City, Hunan Province, 415001 Patentee after: Hunan Xiangtou Jintian Titanium Technology Co., Ltd. Address before: 415000 97 Qianming Road, Deshan Town, Changde economic and Technological Development Zone, Changde City, Hunan Province Patentee before: HUNAN GOLDSKY TITANIUM INDUSTRY TECHNOLOGY Co.,Ltd. |