CN114273579A - Preparation method of super-huge type ultrahigh cone forging - Google Patents
Preparation method of super-huge type ultrahigh cone forging Download PDFInfo
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- CN114273579A CN114273579A CN202111644612.0A CN202111644612A CN114273579A CN 114273579 A CN114273579 A CN 114273579A CN 202111644612 A CN202111644612 A CN 202111644612A CN 114273579 A CN114273579 A CN 114273579A
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- 238000005242 forging Methods 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 52
- 238000003754 machining Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 230000032683 aging Effects 0.000 claims description 18
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000006049 ring expansion reaction Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention provides a preparation method of an extra-large ultrahigh cone forging, which comprises the following steps: sequentially carrying out machining, primary heating, forging and primary rough machining on the cast ingot to obtain a blank; and sequentially carrying out secondary heating, primary ring expanding, secondary rough machining, tertiary heating, secondary ring expanding, heat treatment and finish machining on the blank to obtain the super-large ultrahigh cone forging. The forged piece prepared by the method provided by the invention has the advantages of high yield, greatly reduced cost and better comprehensive performance, and can meet the technical protocol requirements of the forged piece.
Description
Technical Field
The invention belongs to the technical field of cone forgings, and particularly relates to a method for manufacturing an extra-large ultra-high cone forging.
Background
The 7050 alloy super-large ultra-high cone forging is a forging supplied by southwest aluminum to Shanghai aerospace equipment manufacturing general factories; the maximum outer diameter of the ultrahigh cone forging reaches 2700mm, the height of the ultrahigh cone forging reaches 1100mm, the wall thickness is only 70mm, and the cone angle reaches 75 degrees.
The super-large super-high cone forging is an important part for spaceflight, the super-high cone forging has large and complex shape and size and higher requirement on the comprehensive performance of the forging; if the shape is processed by only a straight forging way, the cost investment is extremely high, and the performance and the like can not meet the requirements of technical protocols.
Disclosure of Invention
In view of the above, the invention aims to provide a method for manufacturing an extra-large ultra-high cone forging, and the extra-large ultra-high cone forging with better performance can be manufactured by the method provided by the invention.
The invention provides a preparation method of an extra-large ultrahigh cone forging, which comprises the following steps:
sequentially carrying out machining, primary heating, forging and primary rough machining on the cast ingot to obtain a blank;
and sequentially carrying out secondary heating, primary ring expanding, secondary rough machining, tertiary heating, secondary ring expanding, heat treatment and finish machining on the blank to obtain the super-large ultrahigh cone forging.
Preferably, the product with the taper of 80-90 degrees is processed by one-time rough machining.
Preferably, the primary ring expanding is subjected to cone forming by adopting a forging method, wherein the forging starting temperature is 410-440 ℃, and the finish forging temperature is more than or equal to 350 ℃.
Preferably, the machining angle in the secondary rough machining process is 9-12 degrees.
Preferably, the secondary ring expanding is subjected to cone forming by adopting a forging method, wherein the forging temperature in the forging process is 410-440 ℃, and the finish forging temperature is more than or equal to 350 ℃.
Preferably, the size of the cone obtained after the secondary ring expansion is as follows: the diameter of the big end is 2700-2740 mm, and the diameter of the small end is 2140-2180 mm.
Preferably, the heat treatment method comprises:
quenching is carried out firstly and then aging is carried out.
Preferably, the heating temperature in the quenching process is 472-482 ℃; the heat preservation time is 700-800 minutes.
Preferably, the aging method comprises:
firstly, carrying out primary aging and then carrying out secondary aging;
the temperature of the primary aging is 116-126 ℃;
the temperature of the secondary aging is 172-182 ℃.
Preferably, the temperature of the primary heating is 420-440 ℃;
the temperature of the secondary heating is 410-440 ℃;
the temperature of the third heating is 420-440 ℃.
According to the method provided by the invention, through specific process parameters and operation methods of primary rough machining, secondary rough machining, primary hole expanding, secondary hole expanding and heat treatment, the prepared super-large type ultrahigh cone forging has good size and shape, tensile property, high and low power performance and the like; the forged piece prepared by the method provided by the invention has the advantages of high forged piece yield, greatly reduced cost and better comprehensive performance, and can meet the technical protocol requirements of the forged piece.
Drawings
FIG. 1 is a schematic illustration of a rough machining operation in an embodiment of the present invention;
FIG. 2 is a schematic diagram of secondary rough machining in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a preparation method of an extra-large ultrahigh cone forging, which comprises the following steps:
sequentially carrying out machining, primary heating, forging and primary rough machining on the cast ingot to obtain a blank;
and sequentially carrying out secondary heating, primary ring expanding, secondary rough machining, tertiary heating, secondary ring expanding, heat treatment and finish machining on the blank to obtain the super-large ultrahigh cone forging.
In the present invention, the composition of the ingot is preferably an aluminum alloy, and more preferably 7050 aluminum alloy.
In the invention, the thickness of the cast ingot is preferably 450-550 mm, more preferably 480-520 mm, and most preferably 500 mm; the width of the cast ingot is preferably 1500-1600 mm, more preferably 1520-1580 mm, and most preferably 1540-1560 mm; the length of the cast ingot is preferably 2000-3000 mm, more preferably 2300-2700 mm, and most preferably 2500 mm; the weight of the cast ingot is preferably 5 to 6 tons, more preferably 5.2 to 5.8 tons, and most preferably 5.4 to 5.6 tons.
In the invention, the machining angle is preferably selected during the machining process, and the machining angle can be controlled to be closer to the finished product angle in the subsequent reaming; the machining angle of the machining is preferably 9-12 degrees, and more preferably 10-11 degrees.
In the invention, the temperature of the primary heating is preferably 420-440 ℃, more preferably 425-435 ℃, and most preferably 430 ℃; the heat preservation time in the primary heating process is preferably at least 500 minutes, more preferably 500-3000 minutes, more preferably 1000-2500 minutes, and most preferably 1500-2000 minutes.
In the invention, a 2300X 2100mm flat anvil is preferably arranged on a 10000 ton oil press upper die, a 2500X 2800mm flat anvil lower die is arranged on a working platform (the lower anvil is removed), and the upper longitudinal key and the transverse key are fixed in the forging process.
In the invention, the forging temperature in the forging process is preferably 410-440 ℃, more preferably 420-430 ℃, and most preferably 425 ℃; the finish forging temperature is preferably 350 ℃ or more, more preferably 350 to 440 ℃, more preferably 380 to 420 ℃, and most preferably 400 ℃.
In the present invention, the forging process preferably includes:
primary upsetting, upsetting width, upsetting thickness, squaring, chamfering, rounding and secondary upsetting.
In the invention, the length of the ingot is preferably 1080-1120 mm by the primary upsetting, more preferably 1090-1110 mm, and most preferably 1100 mm; the heading width is preferably 1080-1120 mm, more preferably 1090-1110 mm and most preferably 1100 mm; the upsetting is preferably performed so that the thickness of the ingot is 680-720 mm, more preferably 690-710 mm, and most preferably 700 mm.
In the present invention, the rounding is preferably such that the ingot has a diameter of 980 to 1020mm, more preferably 990 to 1010mm, and most preferably 1000 mm.
In the invention, the secondary upsetting is preferably to make the diameter of the cast ingot 1380-1420 mm, more preferably 1390-1410 mm, and most preferably 1400 mm; the length is 1140-1160 mm, more preferably 1145-1155 mm, and most preferably 1150 mm; and preferably, the secondary upsetting is performed in a head aligning mode, so that the diameter of one end is more than 1400mm, and a proper conical punch is selected for punching and leveling.
In the present invention, the primary roughing preferably produces a specific taper, as shown in fig. 1; the taper is 80-90 degrees, more preferably 82-88 degrees, and most preferably 84-86 degrees.
In the invention, a side-emphasis processing angle is preferably selected in the primary rough processing process, the primary rough processing angle can be closer to a finished product angle in subsequent chambering, and the processing angle is preferably 5-8 degrees, and more preferably 6-7 degrees.
In the invention, the secondary heating temperature is preferably 410-440 ℃, more preferably 420-430 ℃ and most preferably 425 ℃; the holding time of the secondary heating is preferably at least 400 minutes, more preferably 400 to 2400 minutes, more preferably 1000 to 2000 minutes, and most preferably 1500 minutes.
In the invention, the primary ring expanding is preferably subjected to cone forming by adopting a forging method, and the forging opening temperature of the forging is preferably 410-440 ℃, more preferably 420-430 ℃, and most preferably 425 ℃; the final forging temperature of the forging is preferably more than or equal to 350 ℃, more preferably 350-440 ℃, more preferably 380-420 ℃, and most preferably 400 ℃; in the forging process, a 1 ten thousand ton oil press is preferably adopted, the hole is enlarged to the maximum size (mopping) by using a small horse frame, and then the hole is stopped, and the core rod and the ring are required to be vertical during hole enlargement.
In the invention, in the primary ring expanding process, preferably expanding the hole until the outer diameter of the large end is 1900-2100 m; more preferably 2000 mm.
In the present invention, the secondary roughening is preferably to smooth out slopes and planes, as shown in fig. 2.
In the invention, the secondary rough machining process preferably emphasizes the machining angle, and the secondary rough machining angle can be closer to the finished product angle in the subsequent reaming; the machining angle is preferably 9-12 degrees, and more preferably 10-11 degrees.
In the invention, the temperature of the three times of heating is preferably 420-440 ℃, more preferably 425-435 ℃, and most preferably 430 ℃; the heat preservation time in the three heating processes is at least 400 minutes, more preferably 400-2400 minutes, more preferably 1000-2000 minutes, and most preferably 1500 minutes.
In the invention, the secondary ring expanding is preferably subjected to cone forming by adopting a forging method, and the forging temperature in the forging process is preferably 410-440 ℃, more preferably 420-430 ℃, and most preferably 425 ℃; the final forging temperature in the forging process is preferably more than or equal to 350 ℃, more preferably 350-440 ℃, more preferably 380-420 ℃ and most preferably 400 ℃; in the forging process, a large trestle for 1 ten thousand tons of oil presses is preferably adopted for reaming to reach the size, the hole is controlled by a sample plate, and a core rod and a ring are required to be vertical during reaming; the preferred size is 2700-2740 mm of the diameter of the big end, more preferably 2710-2730 mm, and most preferably 2720 mm; the diameter of the small head is preferably 2140-2180 mm, more preferably 2150-2170 mm, and most preferably 2160 mm.
In the present invention, the method of heat treatment includes:
quenching is carried out firstly and then aging is carried out.
In the invention, the heating temperature in the quenching process is preferably 472-482 ℃, more preferably 475-480 ℃, and most preferably 477 ℃; the heat preservation time in the quenching process is preferably 700-800 minutes, more preferably 730-770 minutes, and most preferably 750 minutes; the quenching cooling mode is water cooling, and the water temperature of the water cooling is preferably 60-70 ℃, more preferably 63-67 ℃, and most preferably 65 ℃.
In the present invention, the aging method preferably includes:
and performing primary aging firstly and then performing secondary aging.
In the invention, the temperature of the primary aging is preferably 116-126 ℃, more preferably 118-122 ℃, and most preferably 121 ℃; the heat preservation time is preferably 4-8 hours, more preferably 5-7 hours, and most preferably 2 hours; the temperature of the secondary aging is preferably 172-182 ℃, more preferably 175-180 ℃ and most preferably 177 ℃; the heat preservation time is preferably 8 to 9 hours, and more preferably 8.5 hours.
In the present invention, a lathe is preferably used in the finishing process to a finished size.
In the present invention, the finishing process preferably further comprises:
and (4) carrying out flaw detection, boring re-inspection, sampling and acceptance on the finished product to obtain the super-huge type ultrahigh cone forging.
In the invention, the weight of the super-large ultra-high cone forging is preferably 1-1.5 tons, more preferably 1.1-1.4 tons, and most preferably 1.2-1.3 tons.
In the invention, the size of the super-large type ultrahigh cone forging piece preferably has the maximum outer diameter of 2700mm, the height of 1100mm and the wall thickness of only 70 mm; the taper is 15 °.
According to the method provided by the invention, through specific technological parameters and operation methods of primary rough machining, secondary rough machining, primary reaming, secondary reaming and heat treatment, the prepared super-large ultra-high cone forging has good size and shape, tensile property, high and low power performance and the like, and can meet the technical protocol requirements of the forging; the forged piece prepared by the method provided by the invention has the advantages of high forged piece yield, greatly reduced cost and better comprehensive performance, and can meet the technical protocol requirements of the forged piece.
While the invention has been described and illustrated with reference to specific embodiments thereof, such description and illustration are not intended to limit the invention. It will be clearly understood by those skilled in the art that various changes in form and details may be made therein without departing from the true spirit and scope of the invention as defined by the appended claims, to adapt a particular situation, material, composition of matter, substance, method or process to the objective, spirit and scope of this application. All such modifications are intended to be within the scope of the claims appended hereto. Although the methods disclosed herein have been described with reference to particular operations performed in a particular order, it should be understood that these operations may be combined, sub-divided, or reordered to form equivalent methods without departing from the teachings of the present disclosure. Accordingly, unless specifically indicated herein, the order and grouping of the operations is not a limitation of the present application.
Claims (10)
1. A method for manufacturing an extra-large ultrahigh cone forging comprises the following steps:
sequentially carrying out machining, primary heating, forging and primary rough machining on the cast ingot to obtain a blank;
and sequentially carrying out secondary heating, primary ring expanding, secondary rough machining, tertiary heating, secondary ring expanding, heat treatment and finish machining on the blank to obtain the super-large ultrahigh cone forging.
2. The method according to claim 1, wherein the primary rough machining is used for machining a product with a taper of 80-90 degrees.
3. The method as claimed in claim 1, wherein the primary ring expanding is subjected to cone forming by a forging method, wherein the forging temperature is 410-440 ℃, and the finish forging temperature is more than or equal to 350 ℃.
4. The method according to claim 1, wherein the machining angle in the secondary rough machining process is 9-12 °.
5. The method as claimed in claim 1, wherein the secondary ring expanding is subjected to cone forming by a forging method, wherein the forging temperature in the forging process is 410-440 ℃, and the finish forging temperature is more than or equal to 350 ℃.
6. The method of claim 5, wherein the taper size obtained after the secondary ring expansion is: the diameter of the big end is 2700-2740 mm, and the diameter of the small end is 2140-2180 mm.
7. The method of claim 1, wherein the method of heat treating comprises:
quenching is carried out firstly and then aging is carried out.
8. The method according to claim 7, wherein the heating temperature in the quenching process is 472-482 ℃; the heat preservation time is 700-800 minutes.
9. The method of claim 7, wherein the aging method comprises:
firstly, carrying out primary aging and then carrying out secondary aging;
the temperature of the primary aging is 116-126 ℃;
the temperature of the secondary aging is 172-182 ℃.
10. The method according to claim 1, wherein the temperature of the primary heating is 420-440 ℃;
the temperature of the secondary heating is 410-440 ℃;
the temperature of the third heating is 420-440 ℃.
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| CN202111644612.0A CN114273579A (en) | 2021-12-29 | 2021-12-29 | Preparation method of super-huge type ultrahigh cone forging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115890170A (en) * | 2023-03-08 | 2023-04-04 | 贵州航宇科技发展股份有限公司 | Eccentric conical tube machining method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537468A (en) * | 2009-04-17 | 2009-09-23 | 中国科学院金属研究所 | Design method of middle blank and prefabricating blank during conical shell forgeable piece forming process |
| CN102319868A (en) * | 2011-08-08 | 2012-01-18 | 西南铝业（集团）有限责任公司 | Forging molding method of large-scale aluminum alloy conical ring |
| CN109261866A (en) * | 2018-11-19 | 2019-01-25 | 西南铝业（集团）有限责任公司 | A kind of super-huge conical ring forging production technology of 7050 alloys |
| CN110653328A (en) * | 2019-06-03 | 2020-01-07 | 遵义航天新力精密铸锻有限公司 | Processing technology of inner lug special-shaped cover |
| CN111761009A (en) * | 2020-05-07 | 2020-10-13 | 山东南山铝业股份有限公司 | Forging forming method of 2A70 aluminum alloy aircraft engine conical shell |
-
2021
- 2021-12-29 CN CN202111644612.0A patent/CN114273579A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537468A (en) * | 2009-04-17 | 2009-09-23 | 中国科学院金属研究所 | Design method of middle blank and prefabricating blank during conical shell forgeable piece forming process |
| CN102319868A (en) * | 2011-08-08 | 2012-01-18 | 西南铝业（集团）有限责任公司 | Forging molding method of large-scale aluminum alloy conical ring |
| CN109261866A (en) * | 2018-11-19 | 2019-01-25 | 西南铝业（集团）有限责任公司 | A kind of super-huge conical ring forging production technology of 7050 alloys |
| CN110653328A (en) * | 2019-06-03 | 2020-01-07 | 遵义航天新力精密铸锻有限公司 | Processing technology of inner lug special-shaped cover |
| CN111761009A (en) * | 2020-05-07 | 2020-10-13 | 山东南山铝业股份有限公司 | Forging forming method of 2A70 aluminum alloy aircraft engine conical shell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115890170A (en) * | 2023-03-08 | 2023-04-04 | 贵州航宇科技发展股份有限公司 | Eccentric conical tube machining method |
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Application publication date: 20220405 |