CN102941448B - A kind of aluminium alloy Closely locking nut processing technology - Google Patents
A kind of aluminium alloy Closely locking nut processing technology Download PDFInfo
- Publication number
- CN102941448B CN102941448B CN201210478217.4A CN201210478217A CN102941448B CN 102941448 B CN102941448 B CN 102941448B CN 201210478217 A CN201210478217 A CN 201210478217A CN 102941448 B CN102941448 B CN 102941448B
- Authority
- CN
- China
- Prior art keywords
- aluminium alloy
- locking nut
- closely locking
- worked pieces
- semi worked
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to a kind of aluminium alloy Closely locking nut processing technology, in the present invention, aluminium alloy Closely locking nut is processed according to roughing-artificial aging-fine finishining (boring internal thread containing attacking)-surface treatment-closing in-detection, wherein, the forward setting of artificially aged ensure that in whole process, the hardness of semi worked pieces and finished work-piece, intensity and structural homogenity, the putting upside down of surface treatment and closing in arranges the screw thread that ensure that closing in position and can not damage in surface treatment, thus not only shorten the processing technology length of aluminium alloy Closely locking nut, save process time, improve working (machining) efficiency, and effectively control every mechanical performance of aluminium alloy Closely locking nut, make the destruction tension distribution of aluminium alloy Closely locking nut when detecting consistent, the rate of decay of locking torque and the moment that gets loose slows down, and then the working (machining) efficiency solving aluminium alloy Closely locking nut in prior art is low and the problem of percent defective.
Description
Technical field
The present invention relates to Machining Technology field, particularly relate to a kind of aluminium alloy Closely locking nut processing technology.
Background technology
Aluminium alloy Closely locking nut is owing to possessing good locking property, and the feature such as easy for installation, lightweight, civilian and military aircraft is widely applied.The shape, structure, size, mechanical performance etc. of its relevant criterion to aluminium alloy Closely locking nut have clear and definite requirement.Because every part aluminium alloy Closely locking nut all requires to meet following five mechanical performances simultaneously: locking torque, the moment that gets loose, twist into two parts moment, pretightning force and destruction pulling force, and the force and moment value range that every mechanical performance index all requires the standard that reaches to specify.The aluminium alloy Closely locking nut installed aboard shows through flight test: if locking torque and the moment that gets loose do not reach the moment values requirement that standard specifies, then aircraft is in flight course, due to the vibration of aircraft, often cause nut and bolt connecting coupling to come off, cause aircraft accident; If locking torque and the moment values that gets loose are greater than the moment values requirement that standard specifies, then very difficult when nut and bolt connecting coupling are installed, and cause installing rear pretightning force and do not reach the requirement that standard specifies.If pretightning force does not reach the required value that standard specifies, then the composite plate be connected between nut with bolt connecting coupling will fill not clamping, is easy to produce vibration and come off in the process of aircraft flight, causes aircraft accident; If pretightning force is greater than the force value requirement that standard specifies, then after nut and bolt connecting coupling are installed, because pretightning force is large, composite plate is subject to excessive installing force and ftractures or fragmentation, finally causes aircraft to occur aircraft accident in flight course.Therefore, the manufacture processing of aluminium alloy Closely locking nut must take into full account the requirement of these five mechanical performances, because these five mechanical performances are not completely mutually independently, but it is interrelated and interference, therefore, the manufacturing processing technic of nut fully must coordinate the relation between each power and moment, finally could ensure the finished product nut machined, each performance indications is all qualified, so this manufacturing processing technic is particularly important.Because each part Closely locking nut all requires to meet five mechanical performances simultaneously, and five mechanical performance interrelated and interference again, further increase the difficulty that Closely locking nut manufactures, adopt conventional processing method, namely nut processing method conveniently first comes nut processing profile and screwed hole by machining, pass through heat treatment successively again, close up, surface treatment, the method of Ageing Treatment again, the working (machining) efficiency of aluminium alloy Closely locking nut is not only made to reduce very much, Product processing cost is high, and can not ensure that five mechanical performance index of each part aluminium alloy Closely locking nut are all qualified, the percent defective of aluminium alloy Closely locking nut is improved.
Summary of the invention
The present invention proposes a kind of aluminium alloy Closely locking nut processing technology, be intended to solve the problem of the low and percent defective of the working (machining) efficiency of aluminium alloy Closely locking nut in prior art.
The technical scheme of aluminium alloy Closely locking nut processing technology of the present invention is as follows:
A kind of aluminium alloy Closely locking nut processing technology, comprises the following steps:
Step one, carries out the roughing of appearance and size, and obtains semi worked pieces to base material according to the specification of aluminium alloy Closely locking nut;
Step 2, carries out artificial aging process to semi worked pieces;
Step 3, according to the specification of aluminium alloy Closely locking nut, the semi-finished product via step 2 process are carried out to the fine finishining of appearance and size, and on semi worked pieces, attack brill internal thread, with the required precision making the appearance and size of semi worked pieces meet aluminium alloy Closely locking nut, and obtain finished work-piece;
Step 4, carries out surface treatment to processing via step 3 the finished work-piece got;
Step 5, carries out closing in processing to processing the finished work-piece got via step 4;
Step 6, detects the mechanical performance of processing the finished work-piece got via step 5.
Described base material is aluminium alloy bars.
Roughing described in step one is by realizing after claw or trombone slide clamping base material on engine lathe.
Artificial aging process described in step 2 comprises the following steps: first carry out to semi worked pieces the tempering that temperature is 175 degrees Celsius, and tempering time is 10 hours; Again the semi worked pieces after tempering is cooled naturally.
Fine finishining described in step 3 comprises the following steps: first processed by the rotary body part of engine lathe to semi worked pieces; Then, by six side's twisting positions of plain-milling machine processing semi worked pieces; Then, the burr at six side's twisting positions of semi worked pieces is removed; Finally, after attacking brill internal thread, semi worked pieces is revolved and is located in the threaded mandrel of Digit Control Machine Tool, by Digit Control Machine Tool, appearance and size processing is carried out to semi worked pieces.
Surface treatment described in step 4 comprises the following steps: first, the oil stain on removing finished work-piece surface; Then, surface anodization process is carried out to finished work-piece; Again then, at the surface of finished work-piece coating hexadecanol lubricating layer; Finally, the hexadecanol lubricating layer on finished work-piece is dried.
In the present invention, aluminium alloy Closely locking nut is processed according to roughing-artificial aging-fine finishining (boring internal thread containing attacking)-surface treatment-closing in-detection, wherein, the forward setting of artificially aged ensure that in whole process, the hardness of semi worked pieces and finished work-piece, intensity and structural homogenity, the putting upside down of surface treatment and closing in arranges the screw thread that ensure that closing in position and can not damage in surface treatment, thus not only shorten the processing technology length of aluminium alloy Closely locking nut, save process time, improve working (machining) efficiency; And effectively control every mechanical performance of aluminium alloy Closely locking nut, make the destruction tension distribution of aluminium alloy Closely locking nut when detecting consistent, the rate of decay of locking torque and the moment that gets loose slows down, and then the working (machining) efficiency solving aluminium alloy Closely locking nut in prior art is low and the problem of percent defective.
Accompanying drawing explanation
Fig. 1 is the structural representation of aluminium alloy Closely locking nut;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is that the A-A of Fig. 1 is to sectional view;
Fig. 4 is the semi-finished product structure schematic diagram in embodiments of the invention after step one is processed;
Fig. 5 is the semi-finished product structure schematic diagram in embodiments of the invention after turnery processing in step 3;
Fig. 6 is the semi-finished product structure schematic diagram in embodiments of the invention after step 3 Milling Process;
Fig. 7 is the right view of Fig. 6;
Fig. 8 is the semi-finished product structure schematic diagram in embodiments of the invention after step 4 processing;
Fig. 9 is the finished product structure schematic diagram in embodiments of the invention after step 5 processing.
Detailed description of the invention
The embodiment of aluminium alloy Closely locking nut processing technology of the present invention: as shown in Figures 1 to 9, comprise the following steps:
Step one, in claw base material being loaded engine lathe or trombone slide, carries out rough turn processing (see Fig. 4) by engine lathe to base material;
Step 2, puts into aging furnace by the semi worked pieces after rough turn and carries out artificial aging process;
Step 3, by the rotary body part (see Fig. 5) of the turnery processing semi worked pieces in the trombone slide of engine lathe of the semi worked pieces clamping after Ageing Treatment, again by six side's twisting positions (see Fig. 6 and Fig. 7) of semi worked pieces clamping milling semi worked pieces on plain-milling machine, and remove the burr at six side's twisting positions;
Step 4, is placed on threaded screw thread (see Fig. 8) on common tapping machine by nut;
Step 5, after screw thread process completes, with threaded mandrel location, semi worked pieces is tightened on threaded mandrel, by Digit Control Machine Tool, appearance and size processing (see Fig. 9) is carried out to semi worked pieces, so as to obtain standard-required nut shape, twist into two parts moment values and destroy value of thrust;
Step 6, after digital control processing completes, carries out oil removing, surface anodization process and coating hexadecanol lubricating layer process operation, and is dried by hexadecanol by finished work-piece;
Step 7, is placed on finished work-piece to receive on pressing mold and carries out the processing of receipts pressure, obtain locking torque, the moment values that gets loose and pretension force value (see Fig. 1 to Fig. 3), namely complete whole processing of aluminium alloy Closely locking nut;
Step 8, according to the batch of the aluminium alloy Closely locking nut machined, the aluminium alloy nut of some is randomly drawed by standard, torsion tester carries out nut the measuring mechanical property tests such as locking torque, on tensile testing machine, destruction pull test is carried out to nut again, after pass the test, provide mechanical test report, by this batch of nut packaging warehouse-in, namely complete processing and the checking and accepting of nut by the gross.
Wherein, a kind of base material selected of step is aluminium alloy bars; Artificial aging in step 2 is treated to semi worked pieces tempering at the temperature of 175 DEG C, and tempering time is 10 hours, with the metastable phase making the inside of semi worked pieces define certain limit, and along with the effect of hardening.Along with the increase of aging time, common phase is separated out and is started slowly to disappear, and non-common phase is separated out and started to prevail, material is thus formed the existence of a common phase and non-common phase scope, but at the high temperature of 175 DEG C, the form that part common phase is formed is faster, it is also just faster that aging strength increases.Artificial aging effectively solves aluminium alloy and does not quench by oil quenching or gas and improve the method for hardness or intensity, and raw material of aluminum alloy intensity does not reach product standard requirement, causes Closely locking nut to destroy the batch underproof problem of pulling force.
The present invention has put upside down the operation of heat treatment and machining.In normal conditions, the object of machining is not only the shape specified to obtain Closely locking nut standard, and the more important thing is and twist into two parts moment to obtain the nut specified in Closely locking nut technical specification, if conveniently process route first carries out machining, moment is twisted into two parts in acquisition, carry out artificial aging intensive treatment again, then the scope be difficult to during machining twisting into two parts moment controls.First, assuming that the intensity of the every a collection of raw material of aluminum alloy bought is all consistent, in this case, 1) during machining, if control in the scope that standard specifies by twisting into two parts moment values, then when after artificial aging strengthening, because nut obtains strengthening, what then process in advance twists into two parts moment values and will change, and usually exceeds specification set upper limit value because the effect of strengthening will make to twist into two parts moment values, causes entire block to be scrapped, 2) during machining, if control in a certain scope of the lower limit specified in standard by twisting into two parts moment values, then when after artificial aging strengthening, because strengthening temperature can not all control each time on some fixing points, it can only be a certain temperature range, therefore, with the nut of a collection of or different batch, owing to strengthening the difference of temperature, intensity after causing nut to be strengthened is different, therefore, moment values is twisted into two parts just in time in the scope that standard specifies after the nut strengthening easily caused, the lower limit that moment values specifies lower than standard is twisted into two parts after some nut strengthenings, some nuts twist into two parts the higher limit that moment values specifies higher than standard, nut by the gross is finally caused to be scrapped.Secondly, actual conditions are, due to the reason of smelting technique, the intensity of the every a collection of raw material of aluminum alloy bought is all inconsistent, therefore when machining, cannot determine the moment values of twisting into two parts of every a collection of nut actually should to what kind of scope, after more cannot determining machining, need to carry out artificially aged nut actually which temperature range of this employing carry out timeliness.Therefore, all cause very difficult situation to production and technology.In order to effectively address this problem, what we found out thisly puts upside down operation, effective method, just can solve this difficult problem thoroughly.First, no matter be the raw material of aluminum alloy bought in which producer, no matter also the intensity difference of the different raw material of aluminum alloy criticized has much, as long as when putting into production, the raw material of same batch are decided to be a production batch, this production is criticized and is not mixed with other batch, during artificial aging, artificial aging intensive treatment is carried out according to the material certificate that this raw material manufacturer provides, owing to being the same a collection of raw material that same manufacturer provides, therefore, their intensity is more or less the same, after artificial aging strengthening, intensity obtains strengthening and homogenizing.When carrying out machining again, because intensity obtains homogenizing, according to debugging situation during machining, be just easy to control to twist into two parts moment values and reach the scope that standard specifies.And after machining, follow-uply no longer carry out any strengthening or Weakening treatment to twisting into two parts position, therefore twisting into two parts moment can not change again.
Artificial aging requires: at 175 ± 5 DEG C, be incubated more than 10 hours, the intensity of aluminum alloy after timeliness is σ b >=420MPa, σ 0.2 >=345MPa, δ > 6%.Although standard is to wider range of requirement of strength after artificial aging, but in reality processing, must control in a very narrow scope with the strength range of a collection of product, otherwise the moment of twisting into two parts of nut does not just control during machining, the dispersion of twisting into two parts moment after processing is very large, and product is difficult to qualified.
Below tabulate test situation:
1) with a collection of product, first machining, rear artificial aging, twists into two parts moment values and compares
2) first artificial aging, rear machining, twists into two parts moment values and compares
3) with a collection of product, first machining, rear artificial aging, twists into two parts moment values and compares
4) first artificial aging, rear machining, twists into two parts moment values and compares
5) with a collection of product, first machining, rear artificial aging, twists into two parts moment values and compares
6) first artificial aging, rear machining, twists into two parts moment values and compares
The present invention has put upside down surface treatment and closing in operation.Under regular situation, closing in operation is not only to obtain the locking torque value and the moment values that gets loose that standard specifies, meanwhile, the size of the locking torque that the nut after the size of closing in degree and the quality of surface lubrication degree can directly affect closing in again obtains and the moment values that gets loose.The thread surface lubrication of nut good, want to obtain qualified locking torque and the moment values that gets loose, then when closing up, the receipts pressure degree of nut accordingly can be larger; Bad (the owing lubricating status) if of thread surface lubrication, then when closing up, the receipts pressure degree of nut accordingly can be smaller; Bad (the crossing lubricating status) if of thread surface lubrication, then when closing up, the receipts pressure degree of nut will be larger.Simultaneously, namely the closing in of nut receives pressure degree is mechanical, controlled, but the lubrication of nut thread is chemical treatment, the thickness of its lubricating layer is uncontrollable, therefore, if first carry out closing in operation, locking torque is controlled in certain limit, simultaneously meet get loose moment qualified when, after carry out lubricated, following result will be obtained: lubricating layer thickness suitable or less than normal time, then the locking torque of nut is all qualified with the moment that gets loose, and when lubricating layer thickness is partially thick, the moment that gets loose of nut is defective.If first carry out lubricated, then regardless of the thickness of lubricating layer, because the pressure degree that closes up is controlled, the locking torque that the receipts pressure degree all by controlling nut controls nut is qualified with the moment that gets loose.
1) with a collection of nut, first close up, rear lubrication, locking and release force moment ratio are comparatively
2) first lubricate, rear closing in, locking and release force moment ratio are comparatively
3) with a collection of nut, first close up, rear lubrication, locking and release force moment ratio are comparatively
4) first lubricate, rear closing in, locking and release force moment ratio are comparatively
5) with a collection of nut, first close up, rear lubrication, locking and release force moment ratio are comparatively
6) first lubricate, rear closing in, locking and release force moment ratio are comparatively
Therefore the present invention by above several put upside down operation can effectively control finished product Closely locking nut destroy pulling force defective, the decay of locking torque, the moment that gets loose too fastly do not reach standard-required, twist into two parts the series of problems such as the unstable and pretightning force of moment is defective, a series of technical barrier such as effectively solve aluminium alloy Closely locking nut mechanical performance and metallurgy characteristic is defective, percent defective is high, delivery cycle is long, quality is unstable.
In the above-described embodiments, the surface treatment method in step 6 constitutes the surface treatment to finished work-piece, and in other embodiments, surface treatment also can comprise the operation such as employing plating, coating antirust paint.
In the above-described embodiments, step 3, four, five constitutes the fine finishining of the appearance and size to semi worked pieces, in other embodiments, also can directly realize on Digit Control Machine Tool the fine finishining of the appearance and size of semi worked pieces, and the manufacturing procedure eliminated on engine lathe and plain-milling machine, and Digit Control Machine Tool also can complete the manufacturing procedure of attacking brill internal thread at semi worked pieces.
In the above-described embodiments, artificial aging process in step 2 is that semi worked pieces is tempered to 175 degrees Celsius, in other embodiments, temperature also can be between 100 degrees Celsius to 175 degrees Celsius or 175 degrees Celsius to 200 degrees Celsius, this temperature range and the tempering time at corresponding temperature belong to prior art, therefore repeat no more.
As seen from the above embodiment, aluminium alloy Closely locking nut processing technology of the present invention realizes by following steps, and concrete steps are as follows:
Step one, carries out the roughing of appearance and size, and obtains semi worked pieces to base material according to the specification of aluminium alloy Closely locking nut;
Step 2, carries out artificial aging process to semi worked pieces;
Step 3, according to the specification of aluminium alloy Closely locking nut, the semi-finished product via step 2 process are carried out to the fine finishining of appearance and size, and on semi worked pieces, attack brill internal thread, with the required precision making the appearance and size of semi worked pieces meet aluminium alloy Closely locking nut, and obtain finished work-piece;
Step 4, carries out surface treatment to processing via step 3 the finished work-piece got;
Step 5, carries out closing in processing to processing the finished work-piece got via step 4;
Step 6, detects the mechanical performance of processing the finished work-piece got via step 5.
Claims (4)
1. an aluminium alloy Closely locking nut processing technology, is characterized in that, comprises the following steps:
Step one, carries out the roughing of appearance and size, and obtains semi worked pieces to base material according to the specification of aluminium alloy Closely locking nut;
Step 2, puts into aging furnace by semi worked pieces, carries out artificial aging process to semi worked pieces; Artificial aging process comprises the following steps: first carry out to semi worked pieces the tempering that temperature is 175 degrees Celsius, and tempering time is 10 hours; Again the semi worked pieces after tempering is cooled naturally;
Step 3, according to the specification of aluminium alloy Closely locking nut, the semi-finished product via step 2 process are carried out to the fine finishining of appearance and size, and on semi worked pieces, attack brill internal thread, with the required precision making the appearance and size of semi worked pieces meet aluminium alloy Closely locking nut, and obtain finished work-piece; Described fine finishining comprises the following steps: first processed by the rotary body part of engine lathe to semi worked pieces; Then, by six side's twisting positions of plain-milling machine processing semi worked pieces; Then, the burr at six side's twisting positions of semi worked pieces is removed; Finally, after attacking brill internal thread, semi worked pieces is revolved and is located in the threaded mandrel of Digit Control Machine Tool, by Digit Control Machine Tool, appearance and size processing is carried out to semi worked pieces;
Step 4, carries out surface treatment to processing via step 3 the finished work-piece got;
Step 5, carries out closing in processing to processing the finished work-piece got via step 4;
Step 6, detects the mechanical performance of processing the finished work-piece got via step 5.
2. aluminium alloy Closely locking nut processing technology according to claim 1, is characterized in that, described base material is aluminium alloy bars.
3. aluminium alloy Closely locking nut processing technology according to claim 1, is characterized in that, the roughing described in step one is by realizing after claw or trombone slide clamping base material on engine lathe.
4. aluminium alloy Closely locking nut processing technology according to claim 1, it is characterized in that, the surface treatment described in step 4 comprises the following steps: first, the oil stain on removing finished work-piece surface; Then, surface anodization process is carried out to finished work-piece; Again then, at the surface of finished work-piece coating hexadecanol lubricating layer; Finally, the hexadecanol lubricating layer on finished work-piece is dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478217.4A CN102941448B (en) | 2012-11-22 | 2012-11-22 | A kind of aluminium alloy Closely locking nut processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478217.4A CN102941448B (en) | 2012-11-22 | 2012-11-22 | A kind of aluminium alloy Closely locking nut processing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102941448A CN102941448A (en) | 2013-02-27 |
| CN102941448B true CN102941448B (en) | 2016-01-20 |
Family
ID=47724488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210478217.4A Active CN102941448B (en) | 2012-11-22 | 2012-11-22 | A kind of aluminium alloy Closely locking nut processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102941448B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897794B (en) * | 2014-03-26 | 2015-06-17 | 航天精工股份有限公司 | Water-based hexadecanol lubricant, and preparation method and application thereof |
| CN104148884B (en) * | 2014-05-28 | 2016-08-24 | 无锡兴澄特种材料有限公司 | Special-shaped rod processing technique |
| CN104014998A (en) * | 2014-06-11 | 2014-09-03 | 沈阳飞机工业（集团）有限公司 | Method for machining titanium alloy torsion test bar |
| CN104314948A (en) * | 2014-11-11 | 2015-01-28 | 贵州航天精工制造有限公司 | Light controllable pretightening force self-locking swing nut assembly |
| CN104588978A (en) * | 2014-11-25 | 2015-05-06 | 吴中区长桥诚惠机械加工厂 | Sleeve machining process |
| CN104889679A (en) * | 2015-05-08 | 2015-09-09 | 广西金达造船有限公司 | Machining method of fastening nut of propeller |
| CN105834686A (en) * | 2016-04-26 | 2016-08-10 | 苏州昭沃五金科技有限公司 | Manufacturing process for connecting nut |
| CN106239053B (en) * | 2016-08-26 | 2018-02-23 | 无锡兴澄特种材料有限公司 | The method that special-shaped rod one is pumped into type |
| CN108457968A (en) * | 2017-12-21 | 2018-08-28 | 河南航天精工制造有限公司 | Screwed assembly and its nut |
| CN110026739A (en) * | 2019-04-16 | 2019-07-19 | 贵州航天风华精密设备有限公司 | A kind of processing method of the aluminium alloy thin-walled discoid part of T4 |
| 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 |
| CN114654168A (en) * | 2022-03-02 | 2022-06-24 | 江苏东睿航天科技有限公司 | Processing technology of high-lock nut for aerospace |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5717096A (en) * | 1995-05-01 | 1996-11-21 | Mcdonnell Douglas Corporation | Preparation of pre-coated aluminum alloy articles |
| CA2279084C (en) * | 1998-09-11 | 2013-12-03 | Steven G. Keener | Method for coating faying surfaces of aluminum-alloy components and faying surfaces coated thereby |
| US8137755B2 (en) * | 2005-04-20 | 2012-03-20 | The Boeing Company | Method for preparing pre-coated, ultra-fine, submicron grain high-temperature aluminum and aluminum-alloy components and components prepared thereby |
| CN201180725Y (en) * | 2008-04-21 | 2009-01-14 | 贵州航天精工制造有限公司 | High-lock nut |
| CN201318376Y (en) * | 2008-11-05 | 2009-09-30 | 中国航空工业标准件制造有限责任公司 | Novel high locking nut |
| CN101504025B (en) * | 2009-03-12 | 2013-07-31 | 贾灯喜 | Manufacturing method of double-thread fastener |
| CN102748360A (en) * | 2012-07-10 | 2012-10-24 | 航天精工有限公司 | High-locking bolt provided with groove end as well as processing method and roller thereof |
-
2012
- 2012-11-22 CN CN201210478217.4A patent/CN102941448B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102941448A (en) | 2013-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102941448B (en) | A kind of aluminium alloy Closely locking nut processing technology | |
| CN102941447B (en) | A kind of manufacturing processing technic of bolt | |
| CN103111808B (en) | A kind of nickel base superalloy GH4169 hexagon socket head cap screw processing technologys | |
| CN105397010B (en) | Isothermal die forging forming method for rare earth magnesium alloy thin webbed supporting fork | |
| Rawangwong et al. | Influence of cutting parameters in face milling semi-solid AA 7075 Using Carbide tool affected the surface roughness and tool wear | |
| CN105274457B (en) | The super plasticized processing methods of magnesium alloy 3D and superplasticity method for precisely forming | |
| CN101077515A (en) | Process for manufactruing super large oblique three-way | |
| CN107322237A (en) | A kind of processing technology of high-temperature alloy bolt | |
| CN106624638A (en) | Automobile aluminum alloy hub manufacturing technology | |
| Miao et al. | Low cycle fatigue and strengthening mechanism of cold extruded large diameter internal thread of Q460 steel | |
| CN102248361A (en) | Process method for controlling concentricity error of engine body | |
| CN107677786B (en) | Cast steel shrinkage porosity defect rating method | |
| CN110653328A (en) | Processing technology of inner lug special-shaped cover | |
| CN111069850A (en) | Method for processing stainless steel tensile high-locking nut | |
| CN114654168A (en) | Processing technology of high-lock nut for aerospace | |
| CN110877086A (en) | Preparation method of fine-grain large-size magnesium alloy section | |
| CN111140585A (en) | High-temperature supporting plate self-locking nut and processing method thereof | |
| CN101555939A (en) | Processing method of front casing of differential mechanism | |
| CN111575618B (en) | Treatment method for reducing cracking tendency of large-deformation rolling Al-Zn alloy | |
| CN107877092A (en) | A kind of 12 jiaos of special bolts processing methods of large flange | |
| Siadkowska et al. | Selecting a material for an aircraft diesel engine block | |
| CN110293153B (en) | Accurate straightening method for keeping appearance color consistency after crankshaft ion nitriding | |
| CN115198214B (en) | Manufacturing method of marine diesel engine air valve capable of regulating and controlling mixed grain boundary | |
| DE19956895C1 (en) | Stress relieving aluminum alloy cylinder head casting, by plastic deformation to create elastic compressive stress in shaft regions facing combustion chambers | |
| CN114453540B (en) | Production method of V-shaped high-strength die forging for military aircraft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |