CN106392459B - A kind of method of pre stress shot peen correction aluminium alloy half snap ring deformation - Google Patents
A kind of method of pre stress shot peen correction aluminium alloy half snap ring deformation Download PDFInfo
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- CN106392459B CN106392459B CN201610906013.4A CN201610906013A CN106392459B CN 106392459 B CN106392459 B CN 106392459B CN 201610906013 A CN201610906013 A CN 201610906013A CN 106392459 B CN106392459 B CN 106392459B
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- snap ring
- shot
- half snap
- peening
- otch
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- 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
- B23P6/00—Restoring or reconditioning objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
A kind of method of pre stress shot peen correction aluminium alloy half snap ring deformation, measures half snap ring otch deflection, i.e. neck-in first；Then half snap ring is strutted, the amount of strutting is bigger than otch deflection by 10~30%；Then half and half clasp inner surface shot-peening.The present invention accelerates the internal stress distribution of adjustment part top layer by shot-peening under prestressing force, eliminates deformation and recovers geomery and keep stable, corrects efficiency high, without resilience after correction, avoid it is overproof scrap, reduce production cost.Meanwhile shot-peening introduces beneficial residual compressive stress, improves half snap ring corrosion resistance, wearability and fatigue life.Utilize existing shot blasting equipment, it is not necessary to which complex tool equipment, operation application is simple and easy to do, ensure that product quality.
Description
Technical field
The present invention relates to mechanical manufacturing field, is specifically related to a kind of using pre stress shot peen correction aluminium alloy half snap ring change
The method of shape.
Background technology
Half snap ring is the important stress part of Inspection Aircraft Wheels activity wheel rim fixation, bear to take off, land in it is huge
Shock loading, design and manufacture do not require nothing more than half snap ring material and have higher intensity, and require that half snap ring part has
Higher geometry and dimension precision requirement, the half and half clasp in wheel hub annular groove must assure that tire and wheel rim
Firm secure fit is on wheel hub, so as to ensure flight safety.Half snap ring is a kind of semi-circular shape part, is by aluminum alloy forge piece
It is machined into after annulus diametrically to cut and forms, obtains a half and half clasp.Due to forging heat treatment, machining etc. factor,
There is different degrees of internal stress and stress distribution inequality in half snap ring part, always have the deformation of some half snap rings in production, show and cut
Radially inside contracted at mouthful, shape and size can not meet technical requirements.The deformation of half snap ring not only brings difficulty to assembling, and can make
Into potential danger, such as coordinate not in place, fly in use because certain factor will deviate from annular groove, cause to get rid of castor
The major accident of edge and tire.For half snap ring of deformation be present, it is necessary to take measures to save as far as possible, meet technical requirements, together
When, reduce unnecessary loss from spoilage.
At present, the antidote of half snap ring deformation is typically using cold strong method of pressurizeing.Cold strong method of pressurizeing is at normal temperatures by zero
Part deforms part opposite direction on clamping fixture for correcting, with forcing press pressurization, after pressure is laid down, part is returned to requirement
Shape and size.Also method can be rectified with pressurized heat, it is that pressurization is carried out at a certain temperature.These methods are for certain deflection
Half snap ring can be remedied in technical requirements, but exists clearly disadvantageous, and it is low such as to correct efficiency, high to operator's skill set requirements,
The bounce-back that the part corrected has after shelving, heat, which is rectified, will special firing equipment etc..Therefore, need to open up new correction in production
The method of half snap ring shrinkage deformation.
Blasting technology application for a long time, is mainly used in surface peening and sheet moulding, and also the workpiece necessarily deformed can be carried out
Shot-peening is orthopedic, existing a little report.
J. Harper outstanding (Jack Champaigne) is " shot-peening general introduction " (Shot in the day header of January 18 in 2001
Peening Overview) in 6.2 sections to talk about shot-peening orthopedic, but do not provide specific shot-peening antidote and technique ginseng
Number, it is also how orthopedic using shot-peening without reference to aluminum alloy semi-ring shape part deformation.(Shot Peening Overview,by
Jack Champaigne Jan.18,2001, from webpage http://www.shotpeener.com English data).
《Aeronautical technology technology》09 periodical in 1978 carries the article of the 〇 workshops Peng Yue of one seven two factory three friends, entitled：" thin-walled
Cylindrical component correction new method-shot-peening correction ", this article [《Aeronautical technology technology》On, Peng of Xi'an Aircraft Manufacturing Corporation
The moon, friend delivered the article of entitled " correction of thin wall cylinder-shaped part correction new method shot-peening " ,] describe the original that shot-peening corrects
Reason, influence factor, the influence of injection density, the influence of workpiece stiffness etc., and give the parameter of correlation.This method is used for thin
Wall cylindrical shape steel part, and shot-peening correction of the deflection between 0.05~0.2mm, one of example prestressing force is in shot-peening
It is preceding to head on cylindrical work pieces deformation in advance shot-peening again with jack.But how shot-peening is applied to aluminum alloy semi-ring shape part deformation in text
Orthopedic to be not directed to, methods described and technological parameter are only applicable to the correction of thin wall cylinder-shaped steel part small deformation, are unsuitable for wall thickness as 6
~8mm semi-circular shape Al-alloy parts, and deflection is up to 5mm workpiece.
The content of the invention
It is unsuitable for the semi-circular shape Al-alloy parts that wall thickness is 6~8mm present in prior art to overcome, and deflection is most
The greatly deficiency of 5mm workpiece, the present invention propose a kind of method of pre stress shot peen correction aluminium alloy half snap ring deformation.
The present invention detailed process be：
Step 1, half snap ring otch deflection is measured.With inner circle radial ruler relative at the cut ends of half snap ring of gage measuring two
It is very little；The actual size of measurement is subtracted with the internal diameter given size of half snap ring cutting part, obtains half snap ring otch deflection.
Step 2, otch is strutted.Half snap ring-incision is strutted to apply prestressing force with strut, the amount of strutting deforms than otch
Measure big by 10~30%.
The length of the strut is equal to otch internal diameter given size propping opening amount, and half snap ring is strutted along the radial direction of half snap ring
Incision half snap ring corrected will be needed to strut, half snap ring is deformed in advance more than correct shape before spraying, or reversible deformation is simultaneously
Consider orthopedic rear resilience in favor of the thorough correction of shrinkage deformation.
Step 3, shot-peening.Half snap ring strutted with strut is horizontally mounted on shot-blasting machine workstation, half snap ring with
Workbench is rotated, and shot-peening is carried out by the inner surface of given shot-peening parameter half and half clasp.
Shot-peening parameter：Spray angle is 35 °~60 °, and jet length is 80~250mm, and bullet flow is 10~15Kg/
Min, bullet use S110 stainless steels bullet or S230 stainless steel bullets, and workbench revolution is 4~10r/min, and blast is 0.4~
0.7MPa, A Erman test piece camber value are 0.25~0.35mm, saturation shot-peening coverage rate more than 200%.
Step 4, examine.Half snap ring is removed from compressed air shotblasting machine, unloads lower supporting rod i.e. strut, vernier caliper measurement is used after parking 1h
Half snap ring otch radial dimension, examines internal diameter radial dimension at shot-peening rear card rings cut, whether shape meets requires, to not conforming to
The half snap ring repeat step 2 and step 3 of lattice, shot-peening correction is carried out again to the half snap ring inner surface, until inspection is qualified.
The half snap ring otch deformation refers to due to after cutting, stress release, redistribution in ring, causing half snap ring to become
Shape, and brought out in otch and inwardly shrink maximum.The present invention measures half snap ring otch deflection, i.e. neck-in first；Then will
Half snap ring struts, and half and half clasp inner surface shot-peening carries out shot-peening correction.
The present invention struts part shot-peening under prestress, is advantageous to part and is deformed toward correct direction, accelerates adjustment parts list
Layer internal stress distribution, makes elongate fiber in material reach unanimity substantially, is advantageous to eliminate deformation and recovers geomery and keep
Stable, correction deformation efficiency is high, without resilience after correction, avoid it is overproof scrap, reduce production cost.Meanwhile shot-peening introducing has
The residual compressive stress of benefit, improves half snap ring corrosion resistance, wearability and fatigue life.Utilize existing shot blasting equipment, it is not necessary to
Complex tool equipment, operation application is simple and easy to do, and product quality is guaranteed.
Brief description of the drawings
Fig. 1 is the half snap ring schematic diagram with strut.
Fig. 2 is the flow chart of the present invention.In figure：
1. half snap ring；2. strut；3. bead blasted surfaces.
Embodiment
For the snap ring otch after-contraction problem on deformation of Inspection Aircraft Wheels half, the present invention proposes that a kind of pre stress shot peen correction aluminium closes
The method of golden half snap ring shrinkage deformation.Detailed process is：
Step 1, half snap ring otch deflection is measured.The half snap ring otch deflection is to be cut after half snap ring is cut by annulus
The inside amount of contraction of internal diameter at mouthful；The deflection be equal to half snap ring incision internal diameter design requirement size and actual size it
Difference.With inner circle radial dimension relative at the cut ends of half snap ring of gage measuring two；With the inside callipers scale of half snap ring cutting part
The very little actual size for subtracting measurement, obtain half snap ring otch deflection.It is true for below step 2 to measure half snap ring otch deflection
Surely the amount of strutting of half snap ring is strutted.Described measurer is slide measure.
Step 2, half snap ring-incision being strutted with strut to apply prestressing force, the amount of strutting is bigger than otch deflection by 10~
30%.Using strut, the strut is a diameter of 10mm stainless steel tube；Stay length is equal to otch internal diameter given size propping
Opening amount, the incision of half snap ring is strutted along the radial direction of half snap ring, i.e., will need what is corrected at the otch inner surface of half snap ring two
Half snap ring struts, and half snap ring is deformed in advance more than correct shape before spraying, or reversible deformation and consider it is orthopedic after resilience in favor of
The thorough correction of shrinkage deformation.Apply prestressing force by strutting half snap ring, prestressing force size is determined that the amount of strutting ratio is cut by the amount of strutting
Mouth deflection is big by 10~30%.
Step 3, half and half clasp inner surface shot-peening.Half snap ring strutted with strut is horizontally mounted in compressed air shotblasting machine work
On platform, half snap ring is rotated with workbench, and shot-peening is carried out by the inner surface of given shot-peening parameter half and half clasp.
Shot-peening parameter：Spray angle is 35 °~60 °, and jet length is 80~250mm, and bullet flow is 10~15Kg/
Min, bullet use S110 stainless steels bullet or S230 stainless steel bullets, and workbench revolution is 4~10r/min, and blast is 0.4~
0.7MPa, A Erman test piece camber value are 0.25~0.35mm, saturation shot-peening coverage rate more than 200%.
Step 4, examine.Half snap ring is removed from compressed air shotblasting machine, unloads lower supporting rod i.e. strut, vernier caliper measurement is used after parking 1h
Half snap ring otch radial dimension, examines internal diameter radial dimension at shot-peening rear card rings cut, whether shape meets requires, to not conforming to
The half snap ring repeat step 2 and step 3 of lattice, shot-peening correction is carried out again to the half snap ring inner surface, until inspection is qualified.
The present invention also deforms overproof rectify by different embodiment explanations to the snap ring part notch contraction of aluminium alloy half
Positive concrete application.Described shot-peening correcting process is identical with the shot-peening correcting process proposed in embodiment, different
Part is in the technological parameter in each embodiment.Table 1 is the technological parameter of different embodiments.
The snap ring otch of table 1 half deforms pre stress shot peen rectification technique parameter
Corrected using aluminium alloy half snap ring part notch contraction deformation of the present invention to 3 kinds of different inner diameters is overproof, its
In it is maximum it is overproof be 10mm.Pre stress shot peen correction achieves the goal, and is shown in Table 2.Diameter phi 10mm is used in operation
Strut made of stainless steel tube carries out prestressing force as strut, and technological parameter is shown in Table 1.
The snap ring otch of table 2 half deformation pre stress shot peen correction anteroposterior dimension
Claims (2)
1. the method for a kind of pre stress shot peen correction aluminium alloy half snap ring deformation, it is characterised in that detailed process is：
Step 1, half snap ring otch deflection is measured：With inner circle radial dimension relative at the cut ends of half snap ring of gage measuring two；
The actual size of measurement is subtracted with the internal diameter given size of half snap ring cutting part, obtains half snap ring otch deflection；
Step 2, otch is strutted：Half snap ring-incision strutted with strut to apply prestressing force, the amount of strutting is bigger than otch deflection
10~30%；
Step 3, shot-peening：Half snap ring strutted with strut is horizontally mounted on shot-blasting machine workstation, half snap ring is with work
Platform is rotated, and shot-peening is carried out by the inner surface of given shot-peening parameter half and half clasp；
Shot-peening parameter：Spray angle is 35 °~60 °, and jet length is 80~250mm, and bullet flow is 10~15Kg/min, bullet
Ball uses S110 stainless steels bullet or S230 stainless steel bullets, and workbench revolution is 4~10r/min, and blast is 0.4~
0.7MPa, A Erman test piece camber value are 0.25~0.35mm, saturation shot-peening coverage rate more than 200%；
Step 4, examine：Half snap ring is removed from compressed air shotblasting machine, unloads lower supporting rod, is parked after 1h with the snap ring otch of vernier caliper measurement half
Radial dimension, examines internal diameter radial dimension at shot-peening rear card rings cut, whether shape meets requires, to underproof half snap ring
Repeat step 2 and step 3, shot-peening correction is carried out again to the half snap ring inner surface, until inspection is qualified.
2. the method for pre stress shot peen correction aluminium alloy half snap ring deformation as claimed in claim 1, it is characterised in that the strut
Length be equal to otch internal diameter given size propping opening amount, strutting the incision of half snap ring along the radial direction of half snap ring will need to rectify
Half positive snap ring struts, and half snap ring is deformed in advance more than correct shape before spraying.
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| CN109487183B (en) * | 2018-12-10 | 2020-11-27 | 同济大学 | Wet shot blasting surface modification method suitable for aluminum-lithium alloy |
| CN111992977B (en) * | 2020-07-17 | 2022-05-24 | 国营芜湖机械厂 | Preventive repair research method for stress corrosion damage of main bearing structure of airplane |
| CN113432945B (en) * | 2021-06-23 | 2022-09-23 | 长春汽车检测中心有限责任公司 | Device and method for preparing asbestos standard test piece for polarizing microscope |
| CN117921551A (en) * | 2024-03-25 | 2024-04-26 | 成都飞机工业（集团）有限责任公司 | Shot blasting correction method for controlling deformation of frame parts |
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| GB636084A (en) * | 1947-11-25 | 1950-04-19 | English Electric Co Ltd | Improvements in and relating to runners of hydraulic turbines |
| US4689190A (en) * | 1983-12-19 | 1987-08-25 | Chicago Rawhide Mfg. Co. | Method of and apparatus for molding a composite fluorocarbon helix seal |
| NO324400B1 (en) * | 2002-12-18 | 2007-10-01 | Arne Engebretsen | A structural element |
| CN101530959B (en) * | 2009-04-17 | 2010-07-07 | 中国航空工业第一集团公司北京航空制造工程研究所 | A peen forming method for a ribbed structure |
| CN201519711U (en) * | 2009-09-27 | 2010-07-07 | 天津市立鑫晟精细铸造有限公司 | Tool for adjusting deformation of semi-circular ring steel casting |
| CN102189493B (en) * | 2011-04-22 | 2012-11-07 | 重庆红旗弹簧有限公司 | Reinforced stress shot blasting method and device |
| CN103143597A (en) * | 2013-01-31 | 2013-06-12 | 上海飞机制造有限公司 | Pre-stressing clamp for laser peening formation of workpiece |
| CN104588441B (en) * | 2014-10-15 | 2016-08-17 | 中航飞机股份有限公司西安飞机分公司 | The method of a kind of wallboard pre stress shot peen school shape and pre-bending fixture |
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