CN114654168A - Processing technology of high-lock nut for aerospace - Google Patents
Processing technology of high-lock nut for aerospace Download PDFInfo
- Publication number
- CN114654168A CN114654168A CN202210198681.1A CN202210198681A CN114654168A CN 114654168 A CN114654168 A CN 114654168A CN 202210198681 A CN202210198681 A CN 202210198681A CN 114654168 A CN114654168 A CN 114654168A
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- nut
- finished product
- lock nut
- upset
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- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 239000011265 semifinished product Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 17
- 238000005242 forging Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 238000000641 cold extrusion Methods 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 9
- 238000007747 plating Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 229910052709 silver Inorganic materials 0.000 claims abstract description 6
- 239000004332 silver Substances 0.000 claims abstract description 6
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 12
- 229960000541 cetyl alcohol Drugs 0.000 claims description 8
- 238000002048 anodisation reaction Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 238000003754 machining Methods 0.000 claims 3
- 238000010079 rubber tapping Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 9
- 238000011056 performance test Methods 0.000 description 6
- 238000010622 cold drawing Methods 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a processing technology of a high lock nut for aerospace, which comprises the following manufacturing steps: step S1, forging an aluminum alloy material to prepare a blank; step S2, forming an upset bar material after multiple times of upset forming, and cutting the upset bar material into the length required by the bolt bar material; step S3, cold extruding and upsetting the bar to form a nut semi-finished product, wherein the process part and the working part in the nut semi-finished product are both formed by cold extrusion; step S4, plating copper on the surface of the nut semi-finished product; step S5, tapping an internal thread; step S6, placing the nut workpiece into an aging furnace for artificial aging treatment; and step S7, silver is plated on the inner thread surface of the nut workpiece. The high-lock nut manufactured by the processing technology has high quality and high processing yield, and can obviously reduce the cost.
Description
Technical Field
The invention relates to the technical field of nut processing, in particular to a processing technology of a high-lock nut for aerospace.
Background
The aluminum alloy high-locking nut has the characteristics of good locking performance, convenience in installation, light weight and the like, and is widely applied to civil and military aircrafts.
At present, in the process of producing the high-locking nut, a turning mode is generally adopted for mechanical processing, and the method has the following defects: turning is not very accurate to the precision of size, often can produce small error, leads to the product uniformity of processing to be relatively poor, requires very high scene to the accuracy of mounting dimension, if the uniformity of product is poor, will lead to the installation moment of force when installing not to adjust well, causes the high lock nut compactness inconsistent of installation, often can bring some potential safety hazards like this.
Disclosure of Invention
The invention aims to solve the problem of poor consistency of existing products, and provides a processing technology of a high lock nut for aerospace.
In order to achieve the purpose, the invention provides the following technical scheme: a processing technology of a high lock nut for aerospace comprises the following manufacturing steps:
step S1, forging an aluminum alloy material to prepare a blank;
step S2, forming an upset bar material after multiple times of upset forming, and cutting the upset bar material into the length required by the bolt bar material;
step S3, cold extruding and upsetting the bar to form a nut semi-finished product, wherein the process part and the working part in the nut semi-finished product are both formed by cold extrusion;
step S4, plating copper on the surface of the nut semi-finished product;
in step S5, an internal thread is tapped,
step S6, placing the nut workpiece into an aging furnace for artificial aging treatment;
and step S7, silver is plated on the inner thread surface of the nut workpiece.
Preferably, in step S1, the forging temperature is 600-700 ℃.
Preferably, in the step S6, the aging temperature is 680 +/-10 ℃ and the time is 14-16 h.
Preferably, step S3 includes placing the upset bar into a cold extrusion die, and cold extruding the upset bar by a hydraulic press to form the outer shapes of the process portion and the working portion in the semi-finished product of the tensile high-lock nut.
Preferably, the aerospace high-lock nut further includes: and step S8, performing oil removal, surface anodization and cetyl alcohol lubricating layer coating treatment on the nut finished product workpiece, and airing the cetyl alcohol.
Compared with the prior art, the invention has the beneficial effects that: not only has high quality and high processing yield, but also can obviously reduce the cost.
Drawings
FIG. 1 is a block diagram of a process for manufacturing a high lock nut for aerospace use according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
First embodiment
The invention relates to a processing technology of a high lock nut for aerospace, which comprises the following manufacturing steps:
step S1, forging the aluminum alloy material to prepare a blank; specifically, an aluminum alloy material is selected, cold drawing, solid solution and polishing treatment are carried out in advance, and then cogging and forging are carried out on a forging machine, wherein the forging temperature is 600-700 ℃, and the mechanical property of a forged blank can be ensured.
Step S2, placing the nut workpiece into an aging furnace for artificial aging treatment; specifically, the aging temperature is 680 +/-10 ℃, and the time is 14-16 h;
step S3, forming an upset bar material after multiple upset forming, and cutting the upset bar material into the length required by the bolt bar material; specifically, the first upsetting is carried out by heating to 900 ℃, then the second upsetting is carried out by heating to 1200 ℃, and finally the third upsetting is carried out by heating to 800 ℃, so that the metal structure is more stable.
Step S4, cold extruding and upsetting the bar to form a nut semi-finished product, wherein the process part and the working part in the nut semi-finished product are both formed by cold extrusion; specifically, the upsetting bar is placed into a cold extrusion die, and the upsetting bar is subjected to cold extrusion forming through a hydraulic press to form the shapes of a process part and a working part in the semi-finished product of the tensile high-lock nut.
Step S5, plating copper on the surface of the nut semi-finished product; specifically, a cyanide-free copper plating process is adopted to plate copper on the surface of the initially machined part;
step S6, tapping internal threads, specifically, placing the nut plated with copper on a common tapping machine to tap the internal threads;
step S7, silver is plated on the surface of the internal thread of the nut workpiece;
step S8, performing oil removal, surface anodization and hexadecanol lubricating layer coating on the nut finished product workpiece, and airing the hexadecanol;
and step S9, randomly extracting a certain number of aluminum alloy nuts according to standards according to the batch of the processed aluminum alloy high-lock nuts, performing mechanical performance test tests such as locking torque and the like on the nuts on a torsion testing machine, performing destructive tension test on the nuts on a tension testing machine, issuing a mechanical performance test report after the tests are qualified, and packaging and warehousing the batch of nuts to finish the processing and acceptance work of the whole batch of nuts.
Second embodiment
The invention relates to a processing technology of a high lock nut for aerospace, which comprises the following manufacturing steps:
step S1, forging the aluminum alloy material to prepare a blank; specifically, an aluminum alloy material is selected, cold drawing, solid solution and polishing treatment are carried out in advance, and then cogging and forging are carried out on a forging machine, wherein the forging temperature is 600-700 ℃, and the mechanical property of a forged blank can be ensured.
Step S2, forming an upset bar material after multiple times of upset forming, and cutting the upset bar material into the length required by the bolt bar material; specifically, the first upsetting is carried out by heating to 900 ℃, then the second upsetting is carried out by heating to 1200 ℃, and finally the third upsetting is carried out by heating to 800 ℃, so that the metal structure is more stable.
Step S3, cold extruding and upsetting the bar to form a nut semi-finished product, wherein the process part and the working part in the nut semi-finished product are both formed by cold extrusion; specifically, the upsetting bar is placed into a cold extrusion die, and the upsetting bar is subjected to cold extrusion forming through a hydraulic press to form the shapes of a process part and a working part in the semi-finished product of the tensile high-lock nut.
Step S4, plating copper on the surface of the nut semi-finished product; specifically, a cyanide-free copper plating process is adopted to plate copper on the surface of the initially machined part;
step S5, tapping internal threads, specifically, placing the nut plated with copper on a common tapping machine to tap the internal threads;
step S6, placing the nut workpiece into an aging furnace for artificial aging treatment; specifically, the aging temperature is 680 +/-10 ℃, and the time is 14-16 h;
step S7, silver is plated on the surface of the internal thread of the nut workpiece;
step S8, performing oil removal, surface anodization and cetyl alcohol lubricating layer coating treatment on the nut finished product workpiece, and airing cetyl alcohol;
and step S9, according to the batch of the processed aluminum alloy high-locking nuts, randomly extracting a certain number of aluminum alloy nuts according to standards, performing mechanical performance test tests such as locking torque and the like on the nuts on a torsion testing machine, performing destructive tension test on the nuts on a tension testing machine, issuing a mechanical performance test report after the tests are qualified, and packaging and warehousing the batch of nuts to finish the processing and acceptance work of the whole batch of nuts.
Third embodiment
The invention relates to a processing technology of a high lock nut for aerospace, which comprises the following manufacturing steps:
step S1, forging an aluminum alloy material to prepare a blank; specifically, an aluminum alloy material is selected, cold drawing, solid solution and polishing treatment are carried out in advance, and then cogging and forging are carried out on a forging machine, wherein the forging temperature is 600-700 ℃, and the mechanical property of a forged blank can be ensured.
Step S2, forming an upset bar material after multiple times of upset forming, and cutting the upset bar material into the length required by the bolt bar material; specifically, the first upsetting is carried out by heating to 800 ℃, then the second upsetting is carried out by heating to 1200 ℃, and the third upsetting is carried out by heating to 900 ℃, so that the metal structure is more stable.
Step S3, cold extruding and upsetting the bar to form a nut semi-finished product, wherein the process part and the working part in the nut semi-finished product are both formed by cold extrusion; specifically, the upsetting bar is placed into a cold extrusion die, and the upsetting bar is subjected to cold extrusion forming through a hydraulic press to form the shapes of a process part and a working part in the semi-finished product of the tensile high-lock nut.
Step S4, plating copper on the surface of the nut semi-finished product; specifically, a cyanide-free copper plating process is adopted to plate copper on the surface of the initially machined part;
step S5, tapping internal threads, specifically, placing the nut plated with copper on a common tapping machine to tap the internal threads;
step S6, placing the nut workpiece into an aging furnace for artificial aging treatment; specifically, the aging temperature is 680 +/-10 ℃, and the time is 14-16 h;
step S7, silver is plated on the surface of the internal thread of the nut workpiece;
step S8, performing oil removal, surface anodization and cetyl alcohol lubricating layer coating treatment on the nut finished product workpiece, and airing cetyl alcohol;
and step S9, randomly extracting a certain number of aluminum alloy nuts according to standards according to the batch of the processed aluminum alloy high-lock nuts, performing mechanical performance test tests such as locking torque and the like on the nuts on a torsion testing machine, performing destructive tension test on the nuts on a tension testing machine, issuing a mechanical performance test report after the tests are qualified, and packaging and warehousing the batch of nuts to finish the processing and acceptance work of the whole batch of nuts.
The first, second and third embodiments of the present invention each processed 20 high lock nuts and tested the number of acceptable products. The data are as follows:
| examples | Number of |
| 1 | 14 |
| 2 | 20 |
| 3 | 16 |
As can be seen from the data in table 1, the yield of the second embodiment reaches 100% when 20 products are processed, so the consistency of the products processed by the second embodiment of the present application is significantly better.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention by equivalent replacement or change according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (5)
1. The processing technology of the high lock nut for aerospace is characterized by comprising the following manufacturing steps:
step S1, forging an aluminum alloy material to prepare a blank;
step S2, forming an upset bar material after multiple upset forming, and cutting the upset bar material into the length required by the bolt bar material;
step S3, cold extruding and upsetting the bar to form a nut semi-finished product, wherein the process part and the working part in the nut semi-finished product are both formed by cold extrusion;
step S4, plating copper on the surface of the nut semi-finished product;
in step S5, an internal thread is tapped,
step S6, placing the nut workpiece into an aging furnace for artificial aging treatment;
and step S7, silver is plated on the inner thread surface of the nut workpiece.
2. The aerospace high lock nut machining process according to claim 1, wherein in the step S1, the forging temperature is 600-700 ℃.
3. The aerospace high lock nut machining process according to claim 1, wherein in the step S6, the aging temperature is 680 +/-10 ℃ and the time is 14-16 hours.
4. The aerospace high lock nut processing technology according to claim 1, wherein the step S3 includes placing the upset bar into a cold extrusion die, and cold extruding the upset bar by a hydraulic press to form the shapes of the process portion and the working portion in the semi-finished product of the tensile high lock nut.
5. The aerospace high lock nut machining process according to claim 1, further comprising: and step S8, performing oil removal, surface anodization and cetyl alcohol lubricating layer coating treatment on the nut finished product workpiece, and airing the cetyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210198681.1A CN114654168A (en) | 2022-03-02 | 2022-03-02 | Processing technology of high-lock nut for aerospace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210198681.1A CN114654168A (en) | 2022-03-02 | 2022-03-02 | Processing technology of high-lock nut for aerospace |
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| Publication Number | Publication Date |
|---|---|
| CN114654168A true CN114654168A (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210198681.1A Pending CN114654168A (en) | 2022-03-02 | 2022-03-02 | Processing technology of high-lock nut for aerospace |
Country Status (1)
| Country | Link |
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| CN (1) | CN114654168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115091136A (en) * | 2022-07-08 | 2022-09-23 | 贵州航天精工制造有限公司 | Small-size alloy screw thread forming processing method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2897867A (en) * | 1957-05-06 | 1959-08-04 | Torre Joseph La | Lock nut having pivoting concave bearing end and inwardly deformed tip to effectuate uniformly stressed threads |
| CN102941448A (en) * | 2012-11-22 | 2013-02-27 | 河南航天精工制造有限公司 | Aluminum alloy highly-locking nut machining process |
| CN104551561A (en) * | 2014-12-11 | 2015-04-29 | 海盐三马标准件有限公司 | Nut processing technology |
| CN107322236A (en) * | 2017-06-22 | 2017-11-07 | 贵州精立航太科技有限公司 | A kind of processing technology of high temperature supporting plate self-lock nut |
| CN108488192A (en) * | 2018-03-26 | 2018-09-04 | 贵州精立航太科技有限公司 | A kind of spindle-type riveting nut and preparation method thereof |
| CN110421318A (en) * | 2019-07-24 | 2019-11-08 | 王丽 | A kind of aero titanium alloy high locked bolts processing technology |
| CN110479936A (en) * | 2019-08-20 | 2019-11-22 | 王丽 | A kind of Closely locking nut production method |
| CN111069850A (en) * | 2019-11-30 | 2020-04-28 | 河南航天精工制造有限公司 | Method for processing stainless steel tensile high-locking nut |
| CN113074178A (en) * | 2021-05-06 | 2021-07-06 | 嘉兴京凯云德信息技术有限公司 | Locknut and preparation method thereof |
-
2022
- 2022-03-02 CN CN202210198681.1A patent/CN114654168A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2897867A (en) * | 1957-05-06 | 1959-08-04 | Torre Joseph La | Lock nut having pivoting concave bearing end and inwardly deformed tip to effectuate uniformly stressed threads |
| CN102941448A (en) * | 2012-11-22 | 2013-02-27 | 河南航天精工制造有限公司 | Aluminum alloy highly-locking nut machining process |
| CN104551561A (en) * | 2014-12-11 | 2015-04-29 | 海盐三马标准件有限公司 | Nut processing technology |
| CN107322236A (en) * | 2017-06-22 | 2017-11-07 | 贵州精立航太科技有限公司 | A kind of processing technology of high temperature supporting plate self-lock nut |
| CN108488192A (en) * | 2018-03-26 | 2018-09-04 | 贵州精立航太科技有限公司 | A kind of spindle-type riveting nut and preparation method thereof |
| CN110421318A (en) * | 2019-07-24 | 2019-11-08 | 王丽 | A kind of aero titanium alloy high locked bolts processing technology |
| CN110479936A (en) * | 2019-08-20 | 2019-11-22 | 王丽 | A kind of Closely locking nut production method |
| CN111069850A (en) * | 2019-11-30 | 2020-04-28 | 河南航天精工制造有限公司 | Method for processing stainless steel tensile high-locking nut |
| CN113074178A (en) * | 2021-05-06 | 2021-07-06 | 嘉兴京凯云德信息技术有限公司 | Locknut and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115091136A (en) * | 2022-07-08 | 2022-09-23 | 贵州航天精工制造有限公司 | Small-size alloy screw thread forming processing method |
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