CN207548050U - A kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole - Google Patents
A kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole Download PDFInfo
- Publication number
- CN207548050U CN207548050U CN201721558218.4U CN201721558218U CN207548050U CN 207548050 U CN207548050 U CN 207548050U CN 201721558218 U CN201721558218 U CN 201721558218U CN 207548050 U CN207548050 U CN 207548050U
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- CN
- China
- Prior art keywords
- rolling
- tool apron
- bearing hole
- wheel
- face
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- 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.)
- Expired - Fee Related
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Abstract
A kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole, rolling wheel is located at knife bar one end, and the rolling wheel positioned at knife bar end is made to stretch into bearing hole in the form of cantilever beam, pass through spring applied force, realize the finish rolling hardening to the bearing hole, residual compressive stress is introduced in piece surface, to improve material fatigue resistance, improves product length of service, that is, service life.The utility model can solve the technical issues of existing rolling device cannot roll bearing hole to hole surface rolling.Bearing hole surface roughness after being rolled by the utility model is Ra0.2 μm, and case depth is 0.5 1.5mm.
Description
Technical field
The present invention relates to aviation machine surface rolling reinforcement techniques, particularly of the invention to disclose a kind of finish rolling hardening aviation machine
The rolling tool of wheel bearing bore.
Background technology
Inspection Aircraft Wheels are that aircraft has one of wheel aircraft takeoff landing gear important equipment including helicopter etc., are born larger
Structural loads.With the raising that wheel service life and wheel load require, wheel design and fabrication technology also proposed
New requirement.Wheel bearing hole is supporting-point of the wheel hub on wheel shaft, and bearing is mounted on hub spindle bearing bore, and wheel is enclosed by bearing
It is rotated around wheel shaft, to facilitate aircraft in ground motion.Wheel bearing hole position stress is larger, particularly bearing hole root (bearing
Bottom hole platform and hole wall joint) because structure limitation round-corner transition radius r is smaller, bearing hole root is sharper or very sharp, stress collection
In it is serious, easily induce and germinating fatigue crack, lead to machine hub portion rupture failure or even cause the accident.Rolling is that one kind has
Effect, surface strengthening technology economical and environmentally friendly, significantly improve and improve the fatigue strength and service life of machinework, navigating
It is used at empty wheel fixed flange R, annular groove.Rolling operation is also no working angles, it is with rolling wheel instead point of a knife, rolling
Pinch roller is fixed on knife bar or tool apron end with force application mechanism or is fixed on beside knife bar end, to needing to strengthen
Surface rolling power effect under carry out rolling roll it is flat.Existing Inspection Aircraft Wheels do not have recognized the need to actively to bearing hole implementation table
Face finish rolling hardening, undergoes bench test and line, and bearing hole position influences long-life, high load capacity Inspection Aircraft Wheels robustness
Highlight, it is necessary to bearing hole finish rolling hardening, and existing wheel rolling device can only cylindrical rolling surface, rolling wheel into
Less than in bearing hole.
Invention content
To overcome the deficiencies in the prior art, the present invention proposes a kind of rolling of finish rolling hardening Inspection Aircraft Wheels bearing hole
Tool.
The Inspection Aircraft Wheels bearing hole rolling tool of the spring force includes rolling wheel, mobile knife bar, tool apron, piston rod and end
Lid.Mobile knife bar one end end face center is useful for the axle journal of installation rolling wheel；The movement knife bar other end is mounted on tool apron
Upper surface.Piston rod and spring are respectively positioned in the tool apron, and make the shaft of the piston rod and mobile knife bar mating.
One end face of the spring is bonded with the end face of piston rod；The other end of the spring is sleeved on the bearing in the tool apron
On the boss at upper surface center.Bearing is positioned by screw；End cap is fixed by screws on the lower face of the tool apron；It is described
Rolling wheel has annular groove at the end face outer rim of knife bar one end；The external peripheral surface of the rolling wheel is by cambered surface and inclined-plane group
Into.
The depth of the annular groove is 0.5~1.2mm, and the groove bottom of the annular groove and the end face of rolling wheel with
Inclined-plane seamlessly transits；The distance La on circular arc vertex of the annular groove outer edge apart from rolling wheel external peripheral surface is 4~5mm.
The cambered surface of the external peripheral surface of the rolling wheel is with treating that the surface of finish rolling hardening contacts, to implement the work of finish rolling hardening
Make face；Arc radius in the working face is consistent with the wheel bearing hole root knuckle radius for treating finish rolling hardening or less than waiting to roll
The wheel bearing hole root knuckle radius of pressure；When the arc radius in the working face is less than the wheel axis for treating finish rolling hardening
During the knuckle radius of bearing bore root, difference≤0.05mm of wheel bearing hole root knuckle radius and the arc radius in working face.
The tool apron is hollow cuboid, and the geometric center of one end end face has the mounting hole of screw；The end of the other end
There is the socket of U-shaped in face.The endoporus of the tool apron is circle；The aperture of the endoporus and the diameter phase of the upper piston head of piston rod
Together, and make to be slidably matched therebetween.The limiting stand of the piston rod of radially protruding is arranged at the top of the bore area；The limit dais
Internal diameter it is identical with the diameter of piston club body, and make to be slidably matched therebetween, and supporting piston bar, while limit piston rod
Stroke.Have the bar shaped clamping bench of protrusion in tool apron outer surface side, by clamping bench by tool apron clamping on lathe.Institute
The height for stating clamping bench is less than the height of tool apron；The length of the clamping bench is equal to the sum of the length of tool apron and the length of end cap.
The external peripheral surface of the piston rod is three-level cascaded surface.Wherein on the outer diameter of piston rod upper end and mobile knife bar
Piston rod mounting hole aperture it is identical；The outer diameter of the piston-rod lower end is identical with the internal diameter of the tool apron, and makes therebetween
Clearance fit；Internal diameter in the middle part of the diameter of the piston club body and the tool apron at boss is identical, and make therebetween gap match
It closes.The end face that step difference in the piston rod upper end is formed is for the mobile knife bar of fixed and bearing.
The end cap central has screw hole, and screw is screwed into the screw hole, bearing is pushed to be moved into tool apron hole by the screw,
And then compressed spring pushes piston rod, so as to push mobile knife bar that rolling wheel is pressed on the surface to be rolled；
After tool apron grips, wheel bearing hole end surface has no less than 25mm spacing away from a lateral surface is operated on.
The present invention has the rolling that existing rolling device is transformed, and can solve existing rolling to hole surface rolling
Pressure device cannot roll the technical issues of bearing hole.
The present invention is rational in infrastructure, simple and feasible, can effectively solve prior art Shortcomings.The present invention is by following ways
Diameter is realized：Rolling wheel is arranged to be in and leaves knife bar or tool apron fixed point a distance, with the cantilever beam of suitable length
Form stretches into the purpose that wheel bearing hole realizes finish rolling hardening.Bearing cannot be rolled by solving existing rolling device using the present invention
The technical issues of hole, expands application range of the surface rolling reinforcement technique in Inspection Aircraft Wheels, meanwhile, using the present invention to machine
Wheel bearing bore surface particularly bearing hole root finish rolling hardening introduces beneficial residual compressive stress, improves stress concentration and stress
Situation improves the position fatigue strength, has delayed fatigue crack initiation, improves wheel bearing capacity and service life.Root
According to existing theory analysis and prototype test, fatigue strength improves at least more than 25% after the finish rolling hardening of bearing hole root, meets length
Service life, high load capacity Inspection Aircraft Wheels technology requirement.
Description of the drawings
Fig. 1 is the structure diagram of invention；
Fig. 2 is the partial enlarged view of rolling wheel in Fig. 1；
Fig. 3 is the dimensional structure diagram of tool apron.In figure：
1. rolling wheel；2. end cap；3. bearing；4. axle journal；5. screw；6. move knife bar；7. tool apron；8. piston rod；9. bullet
Spring；10. bearing；M：Clamping face.
Specific embodiment
The present embodiment is a kind of Inspection Aircraft Wheels bearing hole rolling tool, including rolling wheel 1, mobile knife bar 6, tool apron 7, piston rod
8th, end cap 12.The knife bar 2 is straight shank arbour, and knife bar is as rectangular section.Described knife bar one end end face center has axle journal 4, uses
In installation rolling wheel 1；The movement knife bar other end is mounted on tool apron 7.Piston rod 8 and spring 9 are respectively positioned in the tool apron,
And make the shaft of the piston rod and mobile knife bar 6 mating.One end face of the spring is bonded with the end face of piston rod；It is described
The other end of spring is sleeved on the boss at the 10 upper surface center of bearing in the tool apron.Bearing 10 is fixed by screw 11
Position；End cap 12 is fixed on by screw 11 on the lower face of the tool apron.
Bearing 3 in the centre bore of rolling wheel 1 is installed, the rolling wheel is mounted on by knife bar end axle journal by the bearing
On.
The external peripheral surface of the rolling wheel 1 is made of cambered surface and inclined-plane.The cambered surface and the surface for treating finish rolling hardening
Contact, to implement the working face of finish rolling hardening；Wheel bearing hole root of the arc radius with treating finish rolling hardening in the working face
Knuckle radius is consistent or less than the wheel bearing hole root knuckle radius for treating finish rolling hardening；When the circular arc in the working face half
Diameter is less than when the wheel bearing hole root knuckle radius of finish rolling hardening, in wheel bearing hole root knuckle radius and working face
Difference≤0.05mm of arc radius.
The rolling wheel 1 has annular groove at the end face outer rim of knife bar one end, the depth of the annular groove for 0.5~
1.2mm；Reduce the contact area of rolling wheel end face and bearing hole bottom surface by the annular technique groove.
The rolling wheel 1 has annular groove away from the end face at knife bar end, and the depth of the annular groove is 0.5~1.2mm；It is recessed
The distance La on slot outer lip and the circular arc vertex of rolling wheel external peripheral surface is 4~5mm；Groove inward flange and 1 end face of rolling wheel
Linking, and make the cohesive position and the inclined-plane in rolling wheel external peripheral surface and the inclined-plane in rolling wheel external peripheral surface and rolling
Pinch roller end face cohesive position is corresponding.The annular groove is for the rolling wheel end face and bearing hole bottom surface in reduction rolling
Contact area, ensure to the effective finish rolling hardening in bearing hole bottom root, and idler wheel rigidity will not be reduced.
In the present embodiment, the annular groove is depth 1.0mm, and the groove bottom of the groove and the end face of rolling wheel are with oblique
Face seamlessly transits.The distance La on circular arc vertex of the groove outer lip apart from rolling wheel external peripheral surface is 4mm；
The tool apron 7 is hollow cuboid, and the geometric center of one end end face has the mounting hole of screw 11；The other end
There is the socket of U-shaped in end face.The endoporus of the tool apron 7 is circle；The aperture of the endoporus and the diameter of the upper piston head of piston rod
It is identical, and make to be slidably matched therebetween.The limiting stand of the piston rod 8 of radially protruding is arranged at the top of the bore area；The limiting
Internal diameter at platform is identical with the diameter of piston club body, and makes to be slidably matched therebetween, and supporting piston bar 8, limits simultaneously
The stroke of piston rod 8.There is the bar shaped clamping bench of protrusion in the 7 outer surface side of tool apron, tool apron clamping is existed by clamping bench
On lathe.The height of the clamping bench is less than the height of tool apron；The length of the clamping bench is equal to the length of tool apron and the length of end cap
The sum of degree.Geometric center in the lower face of the tool apron 7 has the mounting hole of screw 11.
The mobile knife bar 6 is rectangular section bar.There is the via of piston rod end in one end of the movement knife bar.
The external peripheral surface of the piston rod 8 is three-level cascaded surface.The wherein outer diameter of piston rod upper end and mobile knife bar 6
On piston rod mounting hole aperture it is identical；The outer diameter of the piston-rod lower end is identical with the internal diameter of the tool apron 7, and makes the two
Between clearance fit；The diameter of the piston club body is identical with the internal diameter at boss in the middle part of the tool apron, and makes gap therebetween
Cooperation.The end face that step difference in the piston rod upper end is formed is for the mobile knife bar 6 of fixed and bearing.
End cap 12 is fixed on 7 other end of tool apron, and there is screw hole at 12 center of end cap, and screw 11 is screwed into the screw hole, passes through the spiral shell
Nail pushes bearing 10 to be moved into 7 hole of tool apron, and then compressed spring 9 pushes piston rod 8, so as to push mobile knife bar 6 that will roll
Wheel 1 is pressed on the surface to be rolled；
After tool apron 7 grips, 1 roller press wheel bearing bore of rolling wheel, wheel bearing hole end surface leaves 7 lateral surface of tool apron and stays
There are appropriate spacing, at least 25mm, the present embodiment 30mm.
Claims (7)
1. a kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole, which is characterized in that including rolling wheel, mobile knife bar, tool apron,
Piston rod and end cap；Mobile knife bar one end end face center is useful for the axle journal of installation rolling wheel；The movement knife bar other end
Mounted on the upper surface of tool apron；Piston rod and spring are respectively positioned in the tool apron, and make the bar of the piston rod and mobile knife bar
Body is mating；One end face of the spring is bonded with the end face of piston rod；The other end of the spring is sleeved on positioned at described
On the boss at the bearing upper surface center in tool apron；Bearing is positioned by screw；End cap is fixed by screws in the tool apron
On lower face；The rolling wheel has annular groove at the end face outer rim of knife bar one end；The external peripheral surface of the rolling wheel
It is made of cambered surface and inclined-plane.
2. the rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole as described in claim 1, which is characterized in that the annular groove
Depth is 0.5~1.2mm, and the groove bottom of the annular groove and the end face of rolling wheel are seamlessly transitted with inclined-plane；The annular is recessed
The distance La on circular arc vertex of the slot outer edge apart from rolling wheel external peripheral surface is 4~5mm.
3. the rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole as described in claim 1, which is characterized in that outside the rolling wheel
The cambered surface of circumferential surface is with treating that the surface of finish rolling hardening contacts, to implement the working face of finish rolling hardening；Circular arc in the working face
Radius is consistent with the wheel bearing hole root knuckle radius for treating finish rolling hardening or less than the wheel bearing hole root for treating finish rolling hardening
Knuckle radius；When the arc radius in the working face is less than when the wheel bearing hole root knuckle radius of finish rolling hardening, machine
Difference≤0.05mm of wheel bearing bore root knuckle radius and the arc radius in working face.
4. the rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole as described in claim 1, which is characterized in that during the tool apron is
Empty cuboid, the geometric center of one end end face have the mounting hole of screw；There is the socket of U-shaped in the end face of the other end；The tool apron
Endoporus is circle；The aperture of the endoporus is identical with the diameter of the upper piston head of piston rod, and makes to be slidably matched therebetween；
The limiting stand of the piston rod of radially protruding is arranged at the top of the bore area；The internal diameter of the limit dais and the diameter of piston club body
It is identical, and make to be slidably matched therebetween, and supporting piston bar, while limit the stroke of piston rod；In the tool apron outer surface
There is the bar shaped clamping bench of protrusion in side, by clamping bench by tool apron clamping on lathe；The height of the clamping bench is less than tool apron
Height；The length of the clamping bench is equal to the sum of the length of tool apron and the length of end cap.
5. the rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole as described in claim 1, which is characterized in that the piston rod
External peripheral surface is three-level cascaded surface；The wherein aperture phase of the outer diameter of piston rod upper end and the piston rod mounting hole on mobile knife bar
Together；The outer diameter of the piston-rod lower end is identical with the internal diameter of the tool apron, and makes clearance fit therebetween；The piston club body
Diameter is identical with the internal diameter at boss in the middle part of the tool apron, and makes clearance fit therebetween；Rank in the piston rod upper end
The end face that terraced difference is formed is for the mobile knife bar of fixed and bearing.
6. the rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole as described in claim 1, which is characterized in that the end cap central has
Screw hole, screw are screwed into the screw hole, bearing are pushed to be moved into tool apron hole by the screw, and then compressed spring pushes piston
Bar, so as to push mobile knife bar that rolling wheel is pressed on the surface to be rolled.
7. the rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole as described in claim 1, which is characterized in that tool apron grips
Afterwards, wheel bearing hole end surface has no less than 25mm spacing away from a lateral surface is operated on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558218.4U CN207548050U (en) | 2017-11-21 | 2017-11-21 | A kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558218.4U CN207548050U (en) | 2017-11-21 | 2017-11-21 | A kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207548050U true CN207548050U (en) | 2018-06-29 |
Family
ID=62680466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721558218.4U Expired - Fee Related CN207548050U (en) | 2017-11-21 | 2017-11-21 | A kind of rolling tool of finish rolling hardening Inspection Aircraft Wheels bearing hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207548050U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813102A (en) * | 2017-11-21 | 2018-03-20 | 西安航空制动科技有限公司 | The Inspection Aircraft Wheels bearing hole rolling tool and rolling depression method of spring force |
-
2017
- 2017-11-21 CN CN201721558218.4U patent/CN207548050U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813102A (en) * | 2017-11-21 | 2018-03-20 | 西安航空制动科技有限公司 | The Inspection Aircraft Wheels bearing hole rolling tool and rolling depression method of spring force |
| CN107813102B (en) * | 2017-11-21 | 2019-09-03 | 西安航空制动科技有限公司 | The Inspection Aircraft Wheels bearing hole rolling tool and rolling depression method of spring force |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180629 Termination date: 20211121 |