CN112605322A - Cooling method for thread rolling forming of aluminum alloy fastener for aerospace - Google Patents
Cooling method for thread rolling forming of aluminum alloy fastener for aerospace Download PDFInfo
- Publication number
- CN112605322A CN112605322A CN202011499295.3A CN202011499295A CN112605322A CN 112605322 A CN112605322 A CN 112605322A CN 202011499295 A CN202011499295 A CN 202011499295A CN 112605322 A CN112605322 A CN 112605322A
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- China
- Prior art keywords
- kerosene
- aluminum alloy
- thread rolling
- thread
- aerospace
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/04—Making by means of profiled-rolls or die rolls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Abstract
The invention discloses a cooling method for thread rolling forming of an aluminum alloy fastener for aerospace, which comprises the following steps: a kerosene guide pipe is arranged at the upper part between the thread rolling wheels of the roller press; connecting an oil inlet pipe of the kerosene guide pipe with an oil pump for extracting kerosene; placing the workpiece to be processed between thread rolling wheels of a roller press; starting a rolling machine to work, wherein the rolling machine enables a thread rolling wheel to rotate, and the thread rolling wheel drives a workpiece to be processed to rotate and roll and form; and starting the kerosene oil pump to work, pumping the kerosene oil to the processed workpiece through the kerosene oil pump through the kerosene guide pipe, and continuously lubricating and cooling the processed workpiece in the rolling forming process to finish the processing work. According to the cooling method for the thread rolling forming of the aluminum alloy fastener for aerospace, kerosene is used as cooling liquid for the thread rolling forming of the aluminum alloy thread fastener, and the kerosene has a good cleaning effect. The defects of poor thread roughness and scale in aluminum alloy thread rolling are eliminated, and the processing quality of products and the economic benefits of production and operation are improved.
Description
Technical Field
The invention relates to the technical field of aerospace aluminum alloy fastener thread roll forming, in particular to a cooling method for aerospace aluminum alloy fastener thread roll forming.
Background
At present, interference threads are used for more than 80% of standard aluminum alloy studs and bolts used for aerospace, the aluminum alloy interference threads are formed in an aging state, the plastic deformation capability of aluminum alloy is poor, and a large amount of heat is generated due to friction in the rolling process, so that the defects of thread top diameter cracking, poor roughness, scale generation and the like are easily caused during thread rolling processing. Adopt machine oil as the coolant liquid during traditional man-hour, the high messenger's piece of viscosity of machine oil is remained easily in the screw thread, increases the roughness of screw thread, produces scale defect, destroys the screw thread integrality even.
Disclosure of Invention
The invention mainly aims to solve the defects, and provides the engine oil which adopts emulsified kerosene as cooling liquid, wherein the emulsified kerosene has good fluidity and lower viscosity, aluminum alloy scraps are easy to remove, and the kerosene has volatility and has a heat dissipation effect superior to that of engine oil. The thread obtained by using emulsified kerosene as cooling liquid has the defects of no crest diameter cracking, poor surface roughness, scale generation in the thread and the like.
A cooling method for thread rolling forming of an aluminum alloy fastener for aerospace comprises the following steps: (1) a kerosene guide pipe is arranged at the upper part between the thread rolling wheels of the roller press; (2) connecting an oil inlet pipe of the kerosene guide pipe with an oil pump for extracting kerosene; (3) placing the workpiece to be processed between thread rolling wheels of a roller press; (4) starting a rolling machine to work, wherein the rolling machine enables a thread rolling wheel to rotate, and the thread rolling wheel drives a workpiece to be processed to rotate and roll and form; (5) and starting the kerosene oil pump to work, pumping the kerosene oil to the processed workpiece through the kerosene oil pump through the kerosene guide pipe, and continuously lubricating and cooling the processed workpiece in the rolling forming process to finish the processing work.
Furthermore, the kerosene of the cooling method for the thread rolling forming of the aluminum alloy fastener for aerospace is common kerosene, but not aviation kerosene.
Further, the kerosene of the cooling method for the thread rolling forming of the aluminum alloy fastener for aerospace is emulsified kerosene.
Furthermore, the granularity of the emulsified kerosene of the cooling method for the thread rolling forming of the aluminum alloy fastener for aerospace is 0.256-0.581 mu m.
Further, the average flow of kerosene which continuously flows to a workpiece to be processed in the cooling method for the thread rolling forming of the aluminum alloy fastener for aerospace is 5-10 mL/s.
Further, the average flow velocity of kerosene in the kerosene conduit of the cooling method for the thread roll forming of the aluminum alloy fastener for aerospace is 0.3-0.6 m/s.
Further, the whole processing process of the cooling method for the thread roll forming of the aluminum alloy fastener for aerospace is not higher than 40 ℃.
Compared with the prior art, the invention has the beneficial technical effects that: according to the cooling method for the thread rolling forming of the aluminum alloy fastener for aerospace, kerosene is used as cooling liquid for the thread rolling forming of the aluminum alloy thread fastener, the kerosene has a good cleaning effect, and residual aluminum alloy chips in the rolling process are prevented from scratching and damaging threads; in addition, the kerosene has volatility, the cooling effect is better, and the thread damage caused by overhigh rolling temperature is prevented. The aluminum alloy thread rolling cooling liquid replaces the traditional engine oil to serve as the cooling liquid for aluminum alloy thread rolling, eliminates the defects of poor thread roughness and scale in the aluminum alloy thread rolling, prevents the integrity of threads from being damaged, and improves the processing quality of products and the economic benefits of production and operation.
Drawings
Fig. 1 is a working principle diagram of the present invention.
In the figure, 1, a roller; 2. a workpiece; 3. a fuel conduit; 4. an oil pump.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
A cooling method for thread rolling forming of an aluminum alloy fastener for aerospace comprises the following steps: (1) a kerosene guide pipe 3 is arranged at the upper part between the thread rolling wheels 1 of the roller press; (2) connecting an oil inlet pipe of the kerosene guide pipe 3 with an oil pump 4 for extracting kerosene; (3) placing a workpiece 2 to be processed between thread rolling wheels 1 of a roller press;
(4) starting a rolling machine to work, wherein the rolling machine enables a thread rolling wheel 1 to rotate, and the thread rolling wheel 1 drives a workpiece 2 to be processed to rotate and roll and form; (5) starting the kerosene oil pump 4 to work, pumping the kerosene oil from the kerosene oil pump 4 to the workpiece 2 to be processed through the kerosene guide pipe 3, and continuously lubricating and cooling the workpiece 2 to be processed in the process of roll forming to finish the processing work. The kerosene is common kerosene, and is not aviation kerosene. The kerosene is emulsified kerosene. The granularity of the emulsified kerosene is 0.256-0.581 mu m. The average flow rate of the kerosene which continuously flows to the processed workpiece 2 is 5-10 mL/s. The average flow velocity of kerosene in the kerosene conduit 3 is 0.3-0.6 m/s. The whole processing process is not higher than 40 ℃.
When producing aluminum alloy interference thread for aviation, the common engine oil is used as cooling liquid. In the rolling process, the aluminum alloy interference thread has poor plastic deformation capability in an aging state due to small tolerance of the intermediate diameter, and a large amount of heat is generated due to friction in the rolling process, so that the defects of thread top diameter cracking, poor roughness, scale generation and the like are easily caused during thread rolling processing. After the cooling liquid is changed into kerosene with the emulsified particle size of 0.256-0.581 mu m, the rolled thread has no defects of cracking, scale generation and poor roughness, and the aluminum alloy thread with a good appearance is prepared. The process is that the work piece 2 which is shaped and cooled is arranged between the rotating thread rolling wheels 1, kerosene is conveyed to the upper part of the work piece in rolling through the conduit 3 by the oil pump in the thread rolling process, the kerosene continuously flows to the shaping part of the work piece 2, the lubricating and cooling effects are achieved, the average flow of the kerosene is required to be 5-10mL/s, and the average flow speed of the kerosene in the pipe is required to be 0.3-0.6 m/s.
The invention adopts emulsified kerosene as cooling liquid, the emulsified kerosene has good fluidity and lower viscosity, alloy scraps are easy to remove, and the kerosene has volatility and has better heat dissipation effect than engine oil. The thread obtained by using emulsified kerosene as cooling liquid has the defects of no crest diameter cracking, poor surface roughness, scale generation in the thread and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A cooling method for thread rolling forming of an aluminum alloy fastener for aerospace is characterized by comprising the following steps: the cooling method for the thread roll forming of the aluminum alloy fastener for aerospace comprises the following steps:
(1) a kerosene guide pipe is arranged at the upper part between the thread rolling wheels of the roller press;
(2) connecting an oil inlet pipe of the kerosene guide pipe with an oil pump for extracting kerosene;
(3) placing the workpiece to be processed between thread rolling wheels of a roller press;
(4) starting a rolling machine to work, wherein the rolling machine enables a thread rolling wheel to rotate, and the thread rolling wheel drives a workpiece to be processed to rotate and roll and form;
(5) and starting the kerosene oil pump to work, pumping the kerosene oil to the processed workpiece through the kerosene oil pump through the kerosene guide pipe, and continuously lubricating and cooling the processed workpiece in the rolling forming process to finish the processing work.
2. The cooling method for roll forming of threads of an aerospace aluminum alloy fastener according to claim 1, wherein: the kerosene is common kerosene or non-aviation kerosene.
3. The cooling method for roll forming of threads of an aerospace aluminum alloy fastener according to claim 2, wherein: the kerosene is emulsified kerosene.
4. The cooling method for roll forming of threads of an aerospace aluminum alloy fastener according to claim 3, wherein: the granularity of the emulsified kerosene is 0.256-0.581 mu m.
5. The cooling method for roll forming of threads of an aerospace aluminum alloy fastener according to claim 4, wherein: the average flow rate of the kerosene which continuously flows to the processed workpiece is 5-10 mL/s.
6. The cooling method for roll forming of threads of an aerospace aluminum alloy fastener according to claim 5, wherein: the average flow velocity of the kerosene in the kerosene guide pipe is 0.3-0.6 m/s.
7. The cooling method for roll forming of threads of an aerospace aluminum alloy fastener according to claim 6, wherein: the whole processing process is not higher than 40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011499295.3A CN112605322A (en) | 2020-12-18 | 2020-12-18 | Cooling method for thread rolling forming of aluminum alloy fastener for aerospace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011499295.3A CN112605322A (en) | 2020-12-18 | 2020-12-18 | Cooling method for thread rolling forming of aluminum alloy fastener for aerospace |
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| CN112605322A true CN112605322A (en) | 2021-04-06 |
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| CN202011499295.3A Pending CN112605322A (en) | 2020-12-18 | 2020-12-18 | Cooling method for thread rolling forming of aluminum alloy fastener for aerospace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996874A (en) * | 2021-12-03 | 2022-02-01 | 中机生产力促进中心 | RPV main bolt external thread three-axis rolling processing parameter obtaining method |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996874A (en) * | 2021-12-03 | 2022-02-01 | 中机生产力促进中心 | RPV main bolt external thread three-axis rolling processing parameter obtaining method |
| CN113996874B (en) * | 2021-12-03 | 2022-09-06 | 中机生产力促进中心有限公司 | RPV main bolt external thread three-axis rolling processing parameter obtaining method |
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Application publication date: 20210406 |
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