CN109182717A - A kind of aero-engine bracket pipe fitting bends heat treatment process - Google Patents
A kind of aero-engine bracket pipe fitting bends heat treatment process Download PDFInfo
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- CN109182717A CN109182717A CN201810996576.6A CN201810996576A CN109182717A CN 109182717 A CN109182717 A CN 109182717A CN 201810996576 A CN201810996576 A CN 201810996576A CN 109182717 A CN109182717 A CN 109182717A
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- Prior art keywords
- pipe fitting
- cooling
- heat treatment
- workpiece
- tempering
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/15—Bending tubes using mandrels or the like using filling material of indefinite shape, e.g. sand, plastic material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A kind of aero-engine bracket pipe fitting bends heat treatment process, comprising the following steps: blanking, part are bent, austenitizing heats, jet hardening and blasting treatment, tempering cooling.This aviation bracket guaranteeing workpiece strength and reducing workpiece hardness to guarantee unlike taking in traditional handicraft during processing, and after this process, intensity improves 10%, and fatigue resistance can be improved 28% or more, and service life improves 35% or more；This technological operation is simple, it can be achieved that automated production, long service life at low cost, and it is short to solve existing aviation bracket service life, the low problem of fatigue strength, and has the use of guard member to ensure that this technique processes the precision of part in this technique.
Description
Technical field
At the heat bent the present invention relates to the technique of metal tube processing more particularly to a kind of aero-engine bracket pipe fitting
Science and engineering skill.
Background technique
With science and technology and expanding economy, more and more central bay airlines establishments and personal aircraft are increasingly
It is more, aerospace components demand is also increased year by year.And aircraft be unable to do without aero-engine and has in aero-engine one important
Support member be aeroplane engine machine support, aeroplane engine machine support generally by hollow steel pipe after bending deformation again into
The frame structure in one space of row connection composition, quality of bend pipe is very crucial for entire bracket during this
, and the country there is no definite effective method to reach the high-quality of aerospace parts requirement for the processing of aviation pipe fitting
Amount, the technology of high standard, and it is existing excessively high for the processing cost of control part, or in conventional treatment pipe fitting technique often
So that fatigue strength is too low, service life is too short, and with the development of aeronautical technology, it is more next in the fatigue resistance of other component
It is stronger, when service life is higher and higher, aero-engine bracket pipe fitting is improved outstanding for its service life and fatigue strength
Seem of crucial importance.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of aero-engine bracket pipe fittings to bend heat treatment process,
The technique solves the technical problem that aero-engine stent fatigue intensity is too low, service life is short.
Problem of the invention is not limited to purpose mentioned above, the ordinary skill people of the technical field of the invention
Member can be expressly understood that unmentioned other problems according to following contents.
To achieve the above object, technical scheme is as follows: a kind of aero-engine bracket pipe fitting bends heat treatment
Technique, comprising the following steps:
(1) blanking: the pipe fitting that the sub-eutectoid steel that C content is 0.38~0.45 is raw material is subjected to cleaning treatment, is kept
The drying of raw material, and the pipe fitting of the good corresponding length of cutting as required；
(2) part is bent: the raw material of the good corresponding length of cutting being put into hydraulic pipe bender, to the pipe fitting that will be bent
Carry out emulation bend, confirmation bend it is errorless after, core bending has been carried out to original part, has been made to molding pipe fitting is bent in bending part set
Dedicated resilience-proof device；
(3) austenitizing heats: the original part bent being sent to heat treatment department in time, resilient mounting is unloaded and leads to
Dedicated hanger is crossed to hang below the guide rail of enclosed combustion furnace, with guide rail movement by original part be encased in 650 DEG C~
In 680 DEG C of heating furnace, combustion furnace is heated to 890 DEG C ± 10 DEG C in 15 minutes, heat preservation is come out of the stove for ± 5 minutes 60 minutes；
(4) jet hardening and shot blasting on surface processing: become rail after coming out of the stove as fast railway, complete heating in 15 seconds
Workpiece transport is to quenching chamber, and quenching medium uses PAG water-soluble quenching agent, and the concentration of quenching medium is 5% and solution temperature is maintained at
Between 2 DEG C~10 DEG C；Quenching medium is fitted into sprinkling equipment, pipe fitting is completed to spray in 5 seconds；Then by workpiece in 10 seconds
Transport carries out high speed blasting treatment to pipe fitting outer wall to adjacent blast room, and in the corresponding progress inside pipe wall spray of corresponding nozzle
Sand processing；After the completion of sandblasting, adjacent cooling chamber is entered, cooling chamber carries out workpiece by the way of normal-temperature water solution spraying
Spraying cooling is until pipe fitting is cooled to room temperature；
(5) it is tempered: the cooling pipe fitting finished is transported to tempering furnace, tempering temperature is will tempering temperature in 160 DEG C, 15 minutes
Degree is heated up to 280 DEG C ± 5 DEG C, tempering heat preservation ± 5 minutes 150 minutes.
(6) cooling: cold after tempering goes to transport the pipe fitting after tempering to cooling duct using low-temperature air-cooling, cooling logical
The temperature in road is between -5 DEG C~10 DEG C, cooling 15 minutes ± after five minutes, remove cooling duct until workpiece is to room temperature.
Further, it in the bending technique, bends to there is core to bend, wherein the specific steps are be added heat in the tube
Sand, and hot sand is 120 DEG C~135 DEG C, and hot sand is filled up in pipe fitting, blocks the wherein opening of pipe fitting two.
Further, it states after bend pipe bends successfully, selects the protection to match with the shape of pipe fitting bending part and angle
Part is sleeved on the pipe fitting of bending, for preventing the pipe fitting after bending from springing back, is removed guard member when being heated.
Further, described that only tube surface is quenched when being quenched using PAG water-soluble quenching agent, and
Comprehensive cooling need to be carried out to pipe fitting when into cooling chamber.
Further, sewage recovering system is provided below in the spray of aqueous solution described in the quenching technical.
The present invention has following usefulness:
This aviation bracket is guaranteeing workpiece strength and reduces workpiece hardness unlike taking in traditional handicraft during processing
Guarantee, after this process, intensity improves 10%, and fatigue resistance can be improved 28% or more, service life mentions
It is high by 35% or more；This technological operation is simple, it can be achieved that automated production, long service life at low cost solve existing aviation
Bracket service life is short, the low problem of fatigue strength, and has the use of guard member to ensure that this technique processes in this technique
The precision of part.
Specific embodiment
The present invention elaborates below.
A kind of aero-engine bracket pipe fitting bends heat treatment process, comprising the following steps:
(1) blanking: the pipe fitting that the sub-eutectoid steel that C content is 0.38~0.45 is raw material is subjected to cleaning treatment, is kept
The drying of raw material, and the pipe fitting of the good corresponding length of cutting as required.The previous process that pipe fitting is bent guarantees oil-free on pipe fitting
It is dirty and make pipe fitting.Pipe fitting is carrying out cleaning treatment into before bending, so that the phenomenon that part is not in saddle when bending,
Reduce the scrappage of its part.
(2) part is bent: the raw material of the good corresponding length of cutting being put into hydraulic pipe bender, to the pipe fitting that will be bent
Carry out emulation bend, confirmation bend it is errorless after, to original part carry out bending.This curved simulation process mainly verifies its strength bent
And the speed bent, acquisition and integrated data find most suitable data to be bent, to reduce the scrappage of pipe fitting.
(3) austenitizing heats: the original part bent being sent to heat treatment department in time, resilient mounting is unloaded and leads to
Dedicated hanger is crossed to hang below the guide rail of enclosed combustion furnace, with guide rail movement by original part be encased in 650 DEG C~
In 680 DEG C of heating furnace, combustion furnace is heated to 890 DEG C ± 10 DEG C in 15 minutes, heat preservation is come out of the stove for ± 5 minutes 60 minutes；?
Available more stable austenite is heated within the scope of 890 DEG C ± 10 DEG C, heat preservation was in order to enable pipe at ± 5 minutes 60 minutes
The state of austenite and the conversion of austenite are more thorough in part, more than 60 minutes ± after five minutes, one side waste of resource,
On the other hand make meeting so that austenite conversion is thorough.
(4) jet hardening and surface sand-blasting process: become rail after coming out of the stove as fast railway, complete heating in 15 seconds
For workpiece transport to quenching chamber, quenching medium uses PAG water-soluble quenching agent, and the concentration of quenching medium is 5%~10% and solution temperature
It is maintained between 2 DEG C~10 DEG C；Quenching medium is fitted into sprinkling equipment, pipe fitting is completed to spray in 5 seconds；Then at 10 seconds
It is interior that workpiece transport to adjacent blast room is subjected to high speed blasting treatment to pipe fitting outer wall, and carry out corresponding nozzle is corresponding
Inside pipe wall blasting treatment；After the completion of sandblasting, adjacent cooling chamber is entered, cooling chamber is by the way of normal-temperature water solution spraying pair
Workpiece carries out spraying cooling until pipe fitting is cooled to room temperature.Processing in this way is so that outer surface of pipe fittings hardness is stronger, and in pipe fitting
Inner surface remains good moulding again, so that the fatigue resistance of workpiece is stronger, service life is stronger.The concentration of quenching medium is
5%~10% is also saved and is injected into the full extent to go other than effect can normally eject and reach cold
The load of this and reduction spraying equipment.The tensile stress and pressure when bending on pipe fitting are eliminated after the heating, and subsequent
A compressive pre-stress and strengthening layer are generated to tube surface again in technique blasting craft, improves the service life of pipe fitting.
(5) it is tempered: the cooling pipe fitting finished is transported to tempering furnace, tempering temperature is will tempering temperature in 160 DEG C, 15 minutes
Degree is heated up to 280 DEG C ± 5 DEG C, tempering heat preservation ± 5 minutes 150 minutes.
(6) cooling: cold after tempering goes to transport the pipe fitting after tempering to cooling duct using low-temperature air-cooling, cooling logical
The temperature in road is between -5 DEG C~10 DEG C, cooling 15 minutes ± after five minutes, remove cooling duct until workpiece is to room temperature.
Further, it states after bend pipe bends successfully, selects the protection to match with the shape of pipe fitting bending part and angle
Part is sleeved on the pipe fitting of bending, for preventing the pipe fitting after bending from springing back, is removed guard member when being heated.
The setting of the guard member avoids and bends rear pipe fitting and stacking, and occurs the case where place's of bending rebound in transit.
Further, described that only tube surface is quenched when being quenched using PAG water-soluble quenching agent, and
Comprehensive cooling need to be carried out to pipe fitting when into cooling chamber, that is, only tube surface is quenched when quenching, it is right while cooling
Entire pipe fitting carries out whole cooling.On the one hand the technique quenched in this way eliminates the compression and tensile stress of inside pipe fitting, improve
On the other hand the fatigue strength of pipe fitting forms a strengthening layer outside pipe fitting, and on surface produces compressive pre-stress, into one
Step improves fatigue strength, and while pipe fitting external strengthening inside in cool time first time connect cooling, improve pipe fitting
Internal moulding, enhances abrasion resistance.
Further, sewage recovering system is provided below in the spray of aqueous solution described in the quenching technical.Recycling makes
The water resource expended in this technique is obtained, can be reused, more environmentally-friendly, saving.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (5)
1. a kind of aero-engine bracket pipe fitting bends heat treatment process, which comprises the following steps:
(1) blanking: the pipe fitting that the sub-eutectoid steel that C content is 0.38~0.45 is raw material is subjected to cleaning treatment, keeps former material
The drying of material, and the pipe fitting of the good corresponding length of cutting as required；
(2) part is bent: the raw material of the good corresponding length of cutting being put into hydraulic pipe bender, are carried out to the pipe fitting that will be bent
Emulation is bent, confirmation bend it is errorless after, to original part carry out bending；
(3) austenitizing heats: the original part bent being sent to heat treatment department in time, is hung on by hanger closed
Combustion furnace guide rail below, as workpiece is encased in 660 DEG C~670 DEG C of heating furnace by the movement of guide rail, in 15 minutes
Combustion furnace is heated to 890 DEG C ± 10 DEG C, heat preservation 60min ± 5min comes out of the stove；
(4) jet hardening and surface sand-blasting process: becoming rail as fast railway after coming out of the stove, the workpiece for completing heating in 15 seconds
Transport is to quenching chamber, and quenching medium uses PAG water-soluble quenching agent, and the concentration of quenching medium is 7%~9% and solution temperature is maintained at
Between 2 DEG C~10 DEG C；Quenching medium is fitted into sprinkling equipment, pipe fitting is completed to spray in 5 seconds；Then by workpiece in 10 seconds
Transport carries out high speed blasting treatment to pipe fitting outer wall to adjacent blast room, and towards sandblasting inwardly at every pipe port, with reality
Now to every pipe fitting inner wall blasting treatment；After the completion of sandblasting, adjacent cooling chamber is entered, cooling chamber is sprayed using room temperature aqueous solution
The mode of leaching carries out spraying cooling to workpiece until pipe fitting is cooled to room temperature；
(5) it is tempered: the cooling pipe fitting finished being transported to tempering furnace, tempering temperature is to add tempering temperature in 160 DEG C, 15 minutes
Temperature is to 280 DEG C ± 5 DEG C, tempering heat preservation 150min ± 5min；
(6) cooling: the cooling after tempering uses low-temperature air-cooling, and the pipe fitting after tempering is transported to cooling duct, in cooling duct
Temperature range everywhere controls between -5 DEG C~10 DEG C, and after cooling 15min ± 5min, workpiece continues after removing cooling duct
Natural cooling guarantees that workpiece is cooled to room temperature.
2. a kind of aeroplane engine machine support bends heat treatment process according to claim 1, which is characterized in that described to bend work
In skill, bend to there is core to bend, the specific steps are that, hot sand is added in the tube, and hot sand is 120 DEG C~135 DEG C, and will be hot
Sand fills up in pipe fitting, blocks two open ends of pipe fitting.
3. a kind of aeroplane engine machine support bends heat treatment process according to claim 1, which is characterized in that the bend pipe is curved
After function is made, selects the guard member to match with the shape of pipe fitting bending part and angle to be sleeved on the pipe fitting of bending, be used to
It prevents the pipe fitting after bending from springing back, removes guard member when being heated.
4. a kind of aeroplane engine machine support bends heat treatment process according to claim 1, which is characterized in that using PAG
Only tube surface is quenched when water-soluble quenching agent is quenched, and pipe fitting is carried out when entering cooling chamber comprehensive
It is cooling.
5. a kind of aeroplane engine machine support bends heat treatment process according to claim 1, which is characterized in that the quencher
Sewage recovering system is provided below in the spray of aqueous solution described in skill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996576.6A CN109182717B (en) | 2018-08-29 | 2018-08-29 | Bending heat treatment process for bracket pipe fitting of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996576.6A CN109182717B (en) | 2018-08-29 | 2018-08-29 | Bending heat treatment process for bracket pipe fitting of aircraft engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109182717A true CN109182717A (en) | 2019-01-11 |
| CN109182717B CN109182717B (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810996576.6A Active CN109182717B (en) | 2018-08-29 | 2018-08-29 | Bending heat treatment process for bracket pipe fitting of aircraft engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405023A (en) * | 2019-08-21 | 2019-11-05 | 青岛越洋工程咨询有限公司 | A kind of pipeline heat treatment process |
| CN112893561A (en) * | 2021-01-15 | 2021-06-04 | 滁州美杰精密部件制造有限公司 | Top cover bending process convenient to install |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636330A (en) * | 1979-08-31 | 1981-04-09 | Sumitomo Metal Ind Ltd | Manufacture of elbow provided with straight pipe |
| JPS617020A (en) * | 1984-06-20 | 1986-01-13 | Dai Ichi High Frequency Co Ltd | Production of heat treated bended tube with straight tube part |
| JP2003145220A (en) * | 2001-11-15 | 2003-05-20 | Aisin Takaoka Ltd | Method for manufacturing tubular reinforcing material against collision |
| CN101962707A (en) * | 2010-10-28 | 2011-02-02 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN102837159A (en) * | 2012-07-30 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Method using 0 chromium (Cr) 17 nickel (Ni) 4 copper (Cu) 4 niobium (Nb) thin wall square pipes to machine and manufacture linkage ring guide pipe parts |
| CN103088270A (en) * | 2011-11-03 | 2013-05-08 | 中国石油天然气集团公司 | Manufacturing method of X70 large-deformation steel fire-bent pipe |
| CN104191174A (en) * | 2014-08-19 | 2014-12-10 | 北京北方车辆集团有限公司 | Hot bending-quenching compound forming technology for lower front arc deck |
| JP2016179764A (en) * | 2015-03-24 | 2016-10-13 | 日本発條株式会社 | Manufacturing method of hollow stabilizer |
| JP2017166063A (en) * | 2016-03-09 | 2017-09-21 | 新日鐵住金株式会社 | Method for producing hardened steel material |
-
2018
- 2018-08-29 CN CN201810996576.6A patent/CN109182717B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636330A (en) * | 1979-08-31 | 1981-04-09 | Sumitomo Metal Ind Ltd | Manufacture of elbow provided with straight pipe |
| JPS617020A (en) * | 1984-06-20 | 1986-01-13 | Dai Ichi High Frequency Co Ltd | Production of heat treated bended tube with straight tube part |
| JP2003145220A (en) * | 2001-11-15 | 2003-05-20 | Aisin Takaoka Ltd | Method for manufacturing tubular reinforcing material against collision |
| CN101962707A (en) * | 2010-10-28 | 2011-02-02 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN103088270A (en) * | 2011-11-03 | 2013-05-08 | 中国石油天然气集团公司 | Manufacturing method of X70 large-deformation steel fire-bent pipe |
| CN102837159A (en) * | 2012-07-30 | 2012-12-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Method using 0 chromium (Cr) 17 nickel (Ni) 4 copper (Cu) 4 niobium (Nb) thin wall square pipes to machine and manufacture linkage ring guide pipe parts |
| CN104191174A (en) * | 2014-08-19 | 2014-12-10 | 北京北方车辆集团有限公司 | Hot bending-quenching compound forming technology for lower front arc deck |
| JP2016179764A (en) * | 2015-03-24 | 2016-10-13 | 日本発條株式会社 | Manufacturing method of hollow stabilizer |
| JP2017166063A (en) * | 2016-03-09 | 2017-09-21 | 新日鐵住金株式会社 | Method for producing hardened steel material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405023A (en) * | 2019-08-21 | 2019-11-05 | 青岛越洋工程咨询有限公司 | A kind of pipeline heat treatment process |
| CN112893561A (en) * | 2021-01-15 | 2021-06-04 | 滁州美杰精密部件制造有限公司 | Top cover bending process convenient to install |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109182717B (en) | 2020-05-15 |
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Denomination of invention: A Heat Treatment Process for Bending Aircraft Engine Support Pipe Fitting Effective date of registration: 20230802 Granted publication date: 20200515 Pledgee: Jingzhou Tiansheng Financing Guarantee Co.,Ltd. Pledgor: JINGZHOU JIANGHAN ZHONGLI INDUSTRIAL Co.,Ltd. Registration number: Y2023980050633 |
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