CN106493520B - A kind of processing method of thin-walled elastic ring - Google Patents
A kind of processing method of thin-walled elastic ring Download PDFInfo
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- CN106493520B CN106493520B CN201611049154.5A CN201611049154A CN106493520B CN 106493520 B CN106493520 B CN 106493520B CN 201611049154 A CN201611049154 A CN 201611049154A CN 106493520 B CN106493520 B CN 106493520B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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Abstract
A kind of processing method of thin-walled elastic ring, belongs to aero-engine technology field, described method includes following steps：Mechanical processing, annular thin-wall parts are processed by annular blank part；The boss of part is plugged in the location hole of bending female die of die by mechanical bending, and plane where thin-walled ring end face is bent into the low saddle in intermediate high both sides；Stress relief annealing, the thin-walled elasticity shaped part after bending is processed, which is put into heating furnace, carries out stress relief annealing；The boss of part is plugged in the location hole of bending female die of die by school type, manual calibration part shape, it is ensured that gap is not more than 0.35mm between part and molding surface；Sizing heat treatment, including quenching, in advance tempering and sizing tempering three phases；Product testing carries out nondestructive inspection to the thin-walled elasticity shaped part of dimension control qualification.The method of the invention can effectively improve the processing quality of thin-walled elasticity shaped part, solve thin-walled elasticity shaped part the problems such as being also easy to produce deformation and face crack after sizing is heat-treated.
Description
Technical field
The invention belongs to aero-engine technology fields, more particularly to a kind of processing method of thin-walled elastic ring.
Background technology
The elastic shaped part of some thin-walleds can be often used in aero-engine, the difficulty of processing of this kind of part is larger.Mesh
Method is used by the processing of preceding such thin-walled elasticity shaped part：It is machined first, by being machined blank
Part is processed into thin-walled shaped part；Bending processing is carried out to thin-walled shaped part later, is bent thin-walled shaped part at spy by mold
Fixed shape, to make it have enough elasticity；Heat treatment finally is carried out shaping to the thin-walled shaped part after bending, part is made to exist
With enough intensity while holding specific shape.
But due to being influenced by thin-wall construction, the rigidity of this kind of elasticity shaped part is poor, and part adds by machinery
Larger residual stress is will produce after work and bending processing, so as to cause after sizing is heat-treated, meeting is in piece surface or transition
The positions such as fillet generate small crackle, and increase the deformation of part after heat treatment, influence the normal use of part.Therefore, it needs
A kind of new processing method is wanted to solve the prior art existing above problem when processing thin-walled elasticity shaped part.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of processing method of thin-walled elastic ring, and this method has
Stronger practicability can effectively improve the processing quality of thin-walled elasticity shaped part, solve thin-walled elasticity shaped part in sizing heat
The problems such as deformation and face crack are also easy to produce after processing.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of processing method of thin-walled elastic ring, includes the following steps：
Step 1：Mechanical processing, is clamped in numerically-controlled machine tool by annular blank part, is processed into annular thin-wall parts, thin-walled ring
Shape part includes thin-walled ring, and in thin-walled ring end face, there are two boss for symmetrical machining in the axial direction, add between boss and thin-walled ring
Work has the knuckle that transition connects, and ensures that the surface roughness of annular thin-wall parts reaches 1.6 μm after processing, inside and outside thin-walled ring
The dimensional tolerance of diameter controls within 0.15mm, the various sharp burrs that removal processing generates by hand, at knuckle into
Row polishing treatment；
Step 2：Mechanical bending, bending mold lie against press bending apparatus, and the boss of part is plugged in bending female die of die
Location hole in, it is ensured that after part positioning stablity, enable the punch-pin of bending mold be aligned and cavity plate and start press bending apparatus, press-bending is set
It is standby that punch-pin is driven to move downward, so that thin-walled ring end face is fitted with molding surface, plane where thin-walled ring end face is bent in
Between the low saddle in high both sides；
Step 3：Stress relief annealing, the thin-walled elasticity shaped part after bending is processed are put into heating furnace, are heated to its institute
Select the stress relief annealing temperature range of material, furnace cooling after heat preservation 1-4 hours；
Step 4：The boss of part is plugged in the location hole of bending female die of die by school type, manual calibration part shape
Shape makes thin-walled elasticity shaped part be fitted closely with molding surface, it is ensured that gap is not more than 0.35mm between part and molding surface；
Step 5：It shapes and is heat-treated, including quench, be tempered in advance and shape and be tempered three phases, zero after first high-ranking officers' type
Part is put into heating furnace, is heated to being quenched within the scope of the hardening heat of its selected material, oil cooling to room temperature；After quenching,
Part free state is put into heating furnace and is tempered in advance, the tempering range of its selected material is heated to, is kept the temperature
10-30 minutes, and water cooling is to room temperature；It is carried out shaping back being put into heating furnace on the parts fixation to mold after advance tempering
Fire ensures the dimensionally stable of part and does not spring back, temperature is heated in the tempering range of its selected material, protects
2-3 hours warm, water cooling to room temperature completes all sizing heat treatment；
Step 6：Product testing carries out nondestructive inspection to the thin-walled elasticity shaped part of dimension control qualification.
Bending mold described in step 2 includes cope plate and lower template, and cope plate and lower template are individually fixed in press-bending and set
Standby upper mounting plate and lower platform is fixed with punch-pin on cope plate, and cavity plate is fixed in lower template, and the upper surface of cavity plate is equipped with cambered surface
Groove, cambered surface groove and the punch-pin of cavity plate match, and are opened there are two through-hole in bottom portion of groove, two through-hole distances and thin-walled are elastic
The distance between two boss are identical on shaped part, and locating piece is provided in through-hole, and location hole is provided among locating piece, positioning
Block can be moved up and down along through-hole, be connected by spring between locating piece and lower template, when spring free state, the upper table of locating piece
In face and the upper surface of cavity plate are generally aligned in the same plane.
Nondestructive inspection described in step 6 is the magnetic crack detection carried out using magnetic crack detector.
Beneficial effects of the present invention：
The present invention has supplied a kind of processing method of thin-walled elastic ring, this method to have stronger practicability, can effectively improve
The processing quality of thin-walled elasticity shaped part.The present invention has carried out going to answer to the thin-walled elasticity shaped part after bending processing in step 2
Power processing can effectively remove step 1 mechanical processing and step 2 machinery bending residual stress caused by inside parts, change
The stress state of kind inside parts reduces the influence of part status after residual stress is heat-treated sizing, thin to solve
Wall elasticity shaped part is also easy to produce at deformation, face crack and knuckle iso-stress concentration after sizing is heat-treated and cracks
Problem improves the processing quality of part and the stability of process.Step 4 school type has been carried out after destressing processing,
The step process corrects the rebound and deformation that part generates before this, is conducive to the control of processing part size, makes zero
Size and shape when part is into lower step process are more accurate.
Description of the drawings
Fig. 1 is the dimensional structure diagram of thin-walled elasticity shaped part；
Fig. 2 is the front view of thin-walled elasticity shaped part；
Fig. 3 is the A-A sectional views of Fig. 2；
Fig. 4 is bending mold structure diagram；
Fig. 5 is the vertical view of bending mold lower template and cavity plate；
In figure：1- thin-walled rings, 2- boss, 3- knuckles, 4- cope plates, 5- lower templates, 6- punch-pin, 7- cavity plates, 8- are recessed
Slot, 9- through-holes, 10- locating pieces, 11- location holes, 12- springs.
Specific implementation mode
Example is processed as with the thin-walled elasticity shaped part of T11 materials below in conjunction with the accompanying drawings, the present invention is done further detailed
Explanation.
As shown in Figures 1 to 5, a kind of processing method of thin-walled elastic ring, belongs to aero-engine technology field, for navigating
The processing of thin-walled elasticity shaped part in empty engine.
The processing method of thin-walled elastic ring of the present invention includes the following steps：
Step 1：Mechanical processing.Annular blank part is clamped in numerically-controlled machine tool, is processed into annular thin-wall parts, thin-walled ring
Shape part includes thin-walled ring 1,1 end face of thin-walled ring in the axial direction symmetrical machining there are two boss 2, boss 2 and thin-walled ring 1 it
Between be machined with transition connection knuckle 3, after processing ensure annular thin-wall parts surface roughness reach 1.6 μm, thin-walled
The dimensional tolerance of ring internal-and external diameter controls within 0.15mm, the various sharp burrs that removal processing generates by hand, to transition circle
It is processed by shot blasting at angle.The annular thin-wall parts dimensional uniformity that is processed using numerically-controlled machine tool is high, surface roughness is good
And product quality is more stablized.
Step 2：Mechanical bending.It, need to be by circular thin-wall zero to make the annular thin-wall parts processed in step 1 that there is elasticity
Part is installed on progress bending processing on the bending mold of press bending apparatus.In the present embodiment, bending mold includes cope plate 4 under
Template 5, cope plate 4 and lower template 5 are individually fixed in the upper mounting plate and lower platform of press bending apparatus, and punch-pin is fixed on cope plate 4
6, cavity plate 7 is fixed in lower template 5, the upper surface of cavity plate 7 is equipped with cambered surface groove 8, cambered surface groove 8 and 6 phase of punch-pin of cavity plate 7
Match, for bending part, the bending degree of part can be controlled by adjusting the size of groove 8 so that part obtain it is different
Elasticity.Through-hole 9 there are two being opened in 8 bottom of groove, between two 9 distances of through-hole and two boss 2 on thin-walled elasticity shaped part
Apart from identical, it is provided with locating piece 10 in through-hole 9, location hole 11 is provided among locating piece 10, locating piece 10 can be along through-hole 9
Lower movement, is connected between locating piece 10 and lower template 5 by spring 12, when 12 free state of spring, the upper surface of locating piece 10
It is generally aligned in the same plane with the upper surface of cavity plate 7 interior.
Spring 12 in a free state, the boss 2 of part is plugged in location hole 11, it is ensured that part positioning stablity
Afterwards, it enabling punch-pin 6 be directed at cavity plate 7, and starts press bending apparatus, press bending apparatus upper mounting plate drives the punch-pin 6 of bending mold to move downward,
So that the end face of annular thin-wall parts is fitted with 8 surface of groove on cavity plate 7, plane where annular thin-wall parts end face is bent
At the low saddle in intermediate high both sides, it is made to obtain elasticity.
Step 3：Stress relief annealing.Stress relief annealing is carried out to the thin-walled elasticity shaped part after bending processing in step 2,
Stress relief annealing can effectively remove step 1 mechanical processing and step 2 machinery bending residual stress caused by inside parts,
The stress state for improving inside parts, reduces part deformation and face crack etc. caused by the presence of residual stress and asks
Topic, improves the processing quality and processing stability of part, and advantageous basis has been established for follow-up sizing heat treatment procedure, and
It is preferable to overcome part generated rebound phenomenon after step 2 processing.
In the present embodiment, totally simultaneously by the thin-walled elastic ring Cleaning of Parts of the T11 materials after bending processing in step 2
It dries, is placed on pallet later, part is steadily put in vacuum drying oven together with pallet, charging temperature is more than or equal to 150 DEG C,
550 DEG C -600 DEG C are at the uniform velocity warming up to, 40-60 minutes is kept the temperature later, argon gas (0.2-0.4) MPa is filled with into stove, is cooled to the furnace
80 DEG C or less are come out of the stove air-cooled, complete the stress relief annealing of part.
Step 4：School type.For correcting the rebound and deformation that part generates before this, be conducive to the control of accessory size
System, size and shape when part being made to enter lower step process are more accurate.In the present embodiment, by the convex of thin-walled elasticity shaped part
Platform 2 is plugged in the location hole 11 of bending female die of die, manual calibration part shape, is made on thin-walled elasticity shaped part and cavity plate 7
8 surface of groove fit closely, it is ensured that between part and molding surface gap be not more than 0.35mm；
Step 5：Sizing heat treatment.By heat treatment of shaping the performance indicators satisfaction such as consistency and elasticity of part can make
Play the role of fixed shape, including quenching, in advance tempering and sizing three ranks of tempering with requiring, and to the part after bending
Section.Due to having carried out stress relief annealing in step 3, the residual stress in part is eliminated, the internal stress of part is improved
State, so will not crack or cause zero at positions such as thin-walled ring 1 or knuckles 3 when high temperature carries out shaping heat treatment
The resilience of part.In the present embodiment, progress claimed below is pressed in sizing heat treatment.
Quenching.Part after high-ranking officers' type, which is put into heating furnace, is heated to 800 ± 10 DEG C, keeps the temperature 8-10 minutes, oil cooling later
To room temperature.The performances such as the hardness, intensity and wearability of thin-walled elasticity shaped part can be improved by quenching treatment, and use oil cooling can
Reduce deflection and tearing tendency of the part in quenching.
Tempering in advance.Quenched thin-walled elasticity shaped part free state is flat on pallet, is put into heating furnace and adds
Heat keeps the temperature 15-20 minutes, later water cooling to room temperature to 380 ± 10 DEG C.Due to the hardness of thin-walled elasticity shaped part after quenching compared with
Height is directly also easy to produce crackle when clamping carries out shaping tempering on mold or brittle failure occurs, and therefore, is first arranged before sizing is tempered
It is tempered, to adjust the hardness after thin-walled elastic ring parts quenching, can be come in advance by using hardness test block after tempering in advance
Whether the hardness for being detected part meets the requirements.
Sizing tempering.By on the thin-walled elastic ring parts fixation to mold after advance tempering, ensure the dimensionally stable of part
And do not spring back, it is put into heating furnace is heated to 380-400 DEG C later, keep the temperature 2.5-3 hours, water cooling to room temperature.It shapes back
Hardness, intensity, plasticity and the toughness of the adjustable part of fire ensure essence to reach requirement, while the size of energy stabilizer elements
Degree, and part generated internal stress in quenching is eliminated, it prevents to deform and crack.
Step 6：Product testing.After sizing is heat-treated, need to re-start inspection veritification to accessory size, to ruler
The part of very little qualification carries out nondestructive inspection again, to examine the defects of whether there is or not the crackles for influencing product normal use.In the present embodiment
In, magnetic crack detection is carried out using magnetic crack detector to the thin-walled elasticity shaped part of T11 materials, checks that piece surface and superficial face are
It is no that there are crackles.
Step 7：Storage.The thin-walled elasticity shaped part storage for detecting qualified in step 6 is spare.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to preferred embodiment to this hair
It is bright to be described in detail, it will be appreciated by those skilled in the art that can technical scheme of the present invention be modified or be waited
With replacing, without departing from the objective and range of the technical program, should all cover in scope of the presently claimed invention.
Claims (3)
1. a kind of processing method of thin-walled elastic ring, for the processing of thin-walled elasticity shaped part in aero-engine, feature exists
In including the following steps：
Step 1：Mechanical processing, is clamped in numerically-controlled machine tool by annular blank part, is processed into annular thin-wall parts, circular thin-wall zero
Part includes thin-walled ring, and in thin-walled ring end face, there are two boss for symmetrical machining in the axial direction, are machined between boss and thin-walled ring
The knuckle of transition connection ensures that the surface roughness of annular thin-wall parts reaches 1.6 μm after processing, thin-walled ring internal-and external diameter
Dimensional tolerance controls within 0.15mm, the various sharp burrs that removal processing generates by hand, to being thrown at knuckle
Light processing；
Step 2：Mechanical bending, bending mold lie against press bending apparatus, and the boss of part is plugged in determining for bending female die of die
In the hole of position, it is ensured that after part positioning stablity, enable the punch-pin of bending mold be directed at cavity plate and start press bending apparatus, press bending apparatus band
Dynamic punch-pin moves downward, and thin-walled ring end face is made to fit with molding surface, and plane where thin-walled ring end face is bent at intermediate high
The low saddle in both sides；
Step 3：Stress relief annealing, the thin-walled elasticity shaped part after bending is processed are put into heating furnace, are heated to selected by it
The destressing of thin-walled elasticity shaped part is moved back in the stress relief annealing temperature range of material, furnace cooling after heat preservation 1-4 hours, completion
Fire processing；
Step 4：The boss of part is plugged in the location hole of bending female die of die by school type, and manual calibration part shape makes
Thin-walled elasticity shaped part is fitted closely with molding surface, it is ensured that gap is not more than 0.35mm between part and molding surface；
Step 5：Sizing is heat-treated, including quenching, in advance tempering and sizing are tempered three phases, and the part after first high-ranking officers' type is put
Enter in heating furnace, is heated to being quenched within the scope of the hardening heat of its selected material, oil cooling to room temperature；After quenching, by zero
Part free state is put into heating furnace and is tempered in advance, is heated to the tempering range of its selected material, keeps the temperature 10-30
Minute, and water cooling is to room temperature；Tempering is carried out shaping by being put into heating furnace on the parts fixation to mold after advance tempering, is ensured
It the dimensionally stable of part and does not spring back, temperature is heated in the tempering range of its selected material, heat preservation 2-3 is small
When, water cooling to room temperature completes all sizing heat treatment；
Step 6：Product testing carries out nondestructive inspection to the thin-walled elasticity shaped part of dimension control qualification.
2. the processing method of thin-walled elastic ring according to claim 1, it is characterised in that：Bending mold described in step 2
Including cope plate and lower template, cope plate and lower template are individually fixed in the upper mounting plate and lower platform of press bending apparatus, on cope plate
It is fixed with punch-pin, cavity plate is fixed in lower template, the upper surface of cavity plate is equipped with cambered surface groove, cambered surface groove and the punch-pin phase of cavity plate
Matching is opened in bottom portion of groove there are two through-hole, two through-hole distances and the distance between two boss on thin-walled elasticity shaped part
It is identical, it is provided with locating piece in through-hole, location hole is provided among locating piece, locating piece can be moved up and down along through-hole, locating piece
It is connect by spring between lower template, when spring free state, the upper surface of locating piece and the upper surface of cavity plate are located at same
In plane.
3. the processing method of thin-walled elastic ring according to claim 1, it is characterised in that：Nondestructive inspection described in step 6
For the magnetic crack detection carried out using magnetic crack detector.
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| CN111570874A (en) * | 2020-04-20 | 2020-08-25 | 哈尔滨汽轮机厂有限责任公司 | Elastic ring numerical control milling tool and milling method |
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| CN113897476A (en) * | 2021-09-27 | 2022-01-07 | 中国航发哈尔滨东安发动机有限公司 | Process method for improving qualified rate of thin-wall elastic washer products and tempering tool |
| CN114231725B (en) * | 2021-12-02 | 2024-05-10 | 贵州航天精工制造有限公司 | Heat treatment method and heat treatment device for elastic gasket with angle |
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| EP0839936A1 (en) * | 1996-10-31 | 1998-05-06 | Kanai Juyo Kogyo Co., Ltd. | Production method of a spinning ring for a ring spinning machine |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
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