CN107931450A - The wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing - Google Patents
The wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing Download PDFInfo
- Publication number
- CN107931450A CN107931450A CN201710987278.6A CN201710987278A CN107931450A CN 107931450 A CN107931450 A CN 107931450A CN 201710987278 A CN201710987278 A CN 201710987278A CN 107931450 A CN107931450 A CN 107931450A
- Authority
- CN
- China
- Prior art keywords
- bushing
- stent
- oscillating bearing
- roller
- adapter
- 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.)
- Granted
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Classifications
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/12—Edge-curling
-
- 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
- B21D53/00—Making other particular articles
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a kind of airplane hydraulic pressure pressurized strut oscillating bearing with wheeled crimping method, is related to a kind of method for being used to carry out crimping to the oscillating bearing of airplane hydraulic pressure pressurized strut.It includes being delivered on bushing through compression bar, thrust bearing, adapter, stent and roller with pressure of the forcing press to curling mechanism application straight down, pressure；Adapter is rotated with spanner or other instruments, roller is moved in a circle along vertical axes on bushing, rolls bushing；Step 7：Rotary press, is pressed downward curling mechanism, is repeated several times and acts above, is required until the side plastic deformation of bushing reaches；Pressure is removed, base is replaced with cushion block, one side that bushing is spooled is installed on cushion block by guide rod, until oscillating bearing is completely fixed.The present invention can design roller of different shapes, have a wide range of application according to the difference of oscillating bearing fixed form.
Description
Technical field
The present invention relates to a kind of instrument for being used to carry out the oscillating bearing of airplane hydraulic pressure pressurized strut crimping, it is specifically
A kind of wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing.
Background technology
At present, the method for general common fixing joint bearing has steel ball/punch to coordinate percussion to fix with hammer, die for special purpose
Tool coordinates extruding fixed with forcing press and specific purpose tool coordinates rolling to fix with drilling machine.Steel ball/punch coordinates with hammer to be tapped admittedly
Determining method needs along the circumferential direction repeatedly to tap, and because the dynamics hammered every time is uneven, causes the surface quality of product after fixing to become
Difference, and whole process is time-consuming and laborious；Particular manufacturing craft coordinates extruding fixation to be to press particular manufacturing craft by forcing press with forcing press, passes through
The shape of mould ensures last quality, be easy to cause oscillating bearing and fixes not in place, also easily cracks；Specific purpose tool
Coordinate the fixed tool equipment not only needed of rolling complicated with drilling machine, but also, the warp that not enriches more demanding to operating personnel
Test and easily cause to damage.
The content of the invention
The purpose of the invention is to overcome the shortcoming of background technology, and provide a kind of airplane hydraulic pressure pressurized strut joint
The wheeled crimping method of bearing, can prevent from cracking in oscillating bearing fixation procedure, and oscillating bearing is after the completion of fixation,
Good quality can be obtained.
To achieve these goals, the technical scheme is that：The wheeled crimping of airplane hydraulic pressure pressurized strut oscillating bearing
Method, it is characterised in that it includes the following steps：Step 1：First by guide rod installation in the base, then by loose joint shaft
Hold, bushing and housing are installed on base by guide rod；Step 2：Two rollers are attached separately to the both sides of stent, in stent
Groove in install two collars, and by stent, roller and collar by guide rod be installed on bushing above；Step 3：By thrust
Bearing, compression bar are sequentially loaded into the switching cavity of adapter, then install cover board, and cover board is fixed on adapter with screw
On；Step 4：The component that adapter, thrust bearing, cover board, screw screw and compression bar are formed loads the upper pilot hole of stent
In；Step 5：With pressure of the forcing press to curling mechanism application straight down, pressure is through compression bar, thrust bearing, adapter, branch
Frame and roller are delivered on bushing；Step 6：Adapter is rotated with spanner or other instruments, makes roller along vertical axes on bushing
Move in a circle, roll bushing；Step 7：Rotary press, is pressed downward curling mechanism, is repeated several times and acts above, until lining
The side plastic deformation of set, which reaches, to be required；Step 8：Pressure is removed, replaces base with cushion block, one side that bushing is spooled passes through
Guide rod is installed on cushion block；Step 9：Repeat step one is to step 7, until oscillating bearing is completely fixed.
In the above-mentioned technical solutions, it is clearance fit between the roller and stent.
In the above-mentioned technical solutions, the roller is rack-mount by collar, and the width of roller is than collar and branch
The small 0.1mm of width in the gap formed between frame.
In the above-mentioned technical solutions, it is clearance fit between the base and guide rod, is also gap between stent and guide rod
Coordinate.
Base is used for supporing shell, bushing and oscillating bearing, and limits bushing in the position of vertical direction.Guide rod is used for fixed
Position base, oscillating bearing and curling mechanism.Forcing press gives compression bar one pressure straight down, is transmitted successively by thrust bearing
To adapter, stent, roller, finally on bushing, it is deformed bushing.Adapter is rotated by spanner or other instruments,
The square head of adapter drives stent and roller to move in a circle along vertical axes, rolls bushing.Rotary press, is pressed downward crimping
Mechanism, is repeated several times and acts above, is required until the plastic deformation of bushing reaches, oscillating bearing is fixed.
The present invention makes bushing produce initial acceptable plastic deformation by forcing press, then will by the circular motion of roller
Plastic deformation is expanded to the whole disc of bushing, and whole fixation procedure shows gradual change, and dynamic characteristic can by what is cracked
Energy property is preferably minimized.Tool equipment is simple, and operation is easy, repeatedly repeatedly after, good quality can be obtained.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the present invention considers quality on the basis of the fixing means of existing three kinds of oscillating bearings, personnel and into
This, and the wheeled curling mechanism used and forcing press fitting method, the present invention is in vertical direction with circumferencial direction using progressive
Formula, fixing joint bearing is rolled using roller.
2nd, the present invention is not only simple in structure, easy to operate, only needs forcing press to coordinate with curling mechanism, and cost
Low, the requirement to operating personnel is also low, efficient, and can obtain good product quality；
3rd, the present invention can design roller of different shapes, have a wide range of application according to the difference of oscillating bearing fixed form.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure diagram of curling mechanism.
1- bases in figure, 2- guide rods, 3- housings, 4- bushings, 5- oscillating bearings, 6- stents, 7- collars, 8- rollers, 9- turn
Connector, 10- thrust bearings, 11- cover boards, 12- screws, 13- compression bars, 14- forcing presses, 15- curling mechanisms, 16- racks, 17- hands
Handle, 18- columns, 19- upper beams, 20- bottom end rails, 21- turntables, 22- screw rods, pilot hole under 23-, 24- cushion blocks, are oriented on 25-
Hole, 26- pilot holes, 27- switching cavitys, 28- adapting rods.
Embodiment
The performance that the invention will now be described in detail with reference to the accompanying drawings, but they do not form limitation of the invention, only
It is for example.Make advantages of the present invention more clear by explanation at the same time and be readily appreciated that.
Understood refering to attached drawing：The wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing, it is characterised in that it is included such as
Lower step：
Step 1：First guide rod 2 is installed in base 1, then loose oscillating bearing 5, bushing 4 and housing 3 are passed through
Guide rod 2 is installed on base 1；
Step 2：Two rollers 8 are attached separately to the both sides of stent 6, two collars 7 are installed in the groove of stent 6, and
Stent 6, roller 8 and collar 7 are installed on the top of bushing 4 by guide rod 2；
Step 3：Thrust bearing 10, compression bar 13 are sequentially loaded into the switching cavity 27 of adapter 9, then cover board is installed
11, and cover board 11 is fixed on adapter 9 with screw 12；
Step 4：The component that adapter 9, thrust bearing 10, cover board 11, screw screw 12 and compression bar 13 are formed loads branch
In the upper pilot hole 25 of frame 6；
Step 5：Apply pressure straight down to curling mechanism 15 with forcing press 14, pressure is through compression bar 13, thrust bearing
10th, adapter 9, stent 6 and roller 8 are delivered on bushing 4；
Step 6：Adapter 9 is rotated with spanner or other instruments, roller is moved in a circle along vertical axes on bushing 4,
Roll bushing 4；
Step 7：Rotary press 14, is pressed downward curling mechanism 15, is repeated several times and acts above, until the side of bushing 4
Plastic deformation, which reaches, to be required；
Step 8：Pressure is removed, base 1 is replaced with cushion block 29, one side that bushing 4 is spooled is installed on pad by guide rod 2
On block 29；
Step 9：Repeat step one is to step 7, until oscillating bearing is completely fixed.
In actual work, the present invention includes such as lower structure：Forcing press 14, oscillating bearing 5, housing 3 and curling mechanism 15；
The forcing press 14 includes rack 16 and handle 17, and the rack 16 is by more root posts 18, more 19 and of upper beam
More bottom end rails 20 are formed, and the handle 17 is made of turntable 21 and screw rod 22, and described 22 one end of screw rod is fixed with turntable 21 to be connected
Connect, the other end is threadedly coupled with upper beam 19 and bottom end rail 20 successively；
The curling mechanism 15 includes base 1, guide rod 2, stent 6, adapter 9 and compression bar 13, and 1 upper end of base is equipped with
Lower pilot hole 23,6 both ends of stent are connected with roller 24, and the 6 middle part upper end of stent is equipped with upper pilot hole 25, in stent 6
Subordinate end is equipped with the pilot hole 26 connected with upper pilot hole 25, and the length of side of upper pilot hole 25 is more than the diameter of pilot hole 26, described
9 upper end of adapter is equipped with switching cavity 27, and 9 lower end of adapter is connected with and the upper matched adapting rod 28 of pilot hole 25, institute
State the top of adapter 9 and be connected with the cover board 11 for covering the switching cavity 27,13 upper end of compression bar is connected with screw rod 22, presses
13 lower end of bar is in the switching cavity 27 and spacing with the formation shaft shoulder of cover board 11,13 bottom of compression bar and switching cavity 27
Thrust bearing 10 is installed, 2 upper end of guide rod is located in the pilot hole 26, and 2 lower end of guide rod is under described between bottom
In pilot hole 23；
The oscillating bearing 5 is sleeved on guide rod 2, and oscillating bearing 5 is connected by bushing 4 with housing 3, the oscillating bearing
5th, bushing 4 and housing 3 are installed on base 1 by guide rod 2.
Preferably, it is clearance fit between the roller 8 and stent 6.
Preferably, the roller 8 is installed on the frame 6 by collar 7, and the width of roller 8 than collar 7 and stent 6 it
Between the small 0.1mm of width in gap that is formed.
Preferably, it is clearance fit between the base 1 and guide rod 2, is also clearance fit between stent 6 and guide rod 2.
Cracked in order to prevent in oscillating bearing fixation procedure, and obtain good quality in the completed, the present invention exists
On the basis of common three kinds of fixing means, quality, personnel and cost are considered, coordinated using wheeled curling mechanism and forcing press
Method, in vertical direction and circumferencial direction using gradual, utilize roller rolling fixing joint bearing.
In actual work, base is used to support with positioning joint bearing and stent, it is necessary to there is higher hardness.Guide rod is used for
Positioning base, oscillating bearing and stent, therefore the hole on base and stent and guide rod are clearance fit.Stent, which is used to install, to be rolled
Wheel, while connecting adapter.Tetragonal body is connected with stent below adapter, for transmitting moment of torsion and pressure.Thrust bearing makes to turn
Connector can also rotate in the case where being stressed.Cover board, screw are used for fixed and dust-proof.Forcing press passes through compression bar transmission
Pressure.Cushion block is in oscillating bearing while replacing base after completing crimping.Compression bar, adapter, stent and roller are pressure-containing parts, are needed
There is higher hardness.
The depth of the ring-shaped groove of base needs to be calculated according to specific oscillating bearing thickness and liner height, the purpose is to
Ensure that bushing is equal in the height that the both sides of oscillating bearing are exposed.The difference of cushion block and base is ringless-type groove, puts down
Face is used to support the side of crimping.
It is accurate clearance fit between roller and stent, the width of roller is smaller than the width formed between collar and stent
0.1 millimeter.Roller can be freely rotated.Change the shape of roller, be suitable for different types of oscillating bearing.
Other unaccounted parts belong to the prior art.
Claims (4)
1. the wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing, it is characterised in that it includes the following steps：
Step 1：First guide rod (2) is installed in base (1), then by loose oscillating bearing (5), bushing (4) and housing
(3) it is installed on by guide rod (2) on base (1)；
Step 2：Two rollers (8) are attached separately to the both sides of stent (6), two collars are installed in the groove of stent (6)
(7), and by stent (6), roller (8) and collar (7) by guide rod (2) it is installed on above bushing (4)；
Step 3：Thrust bearing (10), compression bar (13) are sequentially loaded into the switching cavity (27) of adapter (9), then installed
Cover board (11), and cover board (11) is fixed on adapter (9) with screw (12)；
Step 4：The component that adapter (9), thrust bearing (10), cover board (11), screw screw (12) and compression bar (13) are formed
It is fitted into the upper pilot hole (25) of stent (6)；
Step 5：With pressure of the forcing press (14) to curling mechanism (15) application straight down, pressure is through compression bar (13), thrust axis
(10), adapter (9), stent (6) and roller (8) is held to be delivered on bushing (4)；
Step 6：Adapter (9) is rotated with spanner or other instruments, roller is moved in a circle along vertical axes on bushing (4),
Roll bushing (4)；
Step 7：Rotary press (14), is pressed downward curling mechanism (15), is repeated several times and acts above, until the one of bushing (4)
Side plastic deformation, which reaches, to be required；
Step 8：Pressure is removed, base (1) is replaced with cushion block (24), one side that bushing (4) is spooled is installed by guide rod (2)
On cushion block (24)；
Step 9：Repeat step one is to step 7, until oscillating bearing is completely fixed.
2. the wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing according to claim 1, it is characterised in that：It is described
It is clearance fit between roller (8) and stent (6).
3. the wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing according to claim 2, it is characterised in that：It is described
Roller (8) is installed on stent (6) by collar (7), and the width of roller (8) is than forming between collar (7) and stent (6)
The small 0.1mm of width in gap.
4. the wheeled crimping of airplane hydraulic pressure pressurized strut oscillating bearing according to any one of claims 1 to 3 claim
Method, it is characterised in that：It is clearance fit between the base (1) and guide rod (2), between being also between stent (6) and guide rod (2)
Gap coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987278.6A CN107931450B (en) | 2017-10-20 | 2017-10-20 | The wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987278.6A CN107931450B (en) | 2017-10-20 | 2017-10-20 | The wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107931450A true CN107931450A (en) | 2018-04-20 |
| CN107931450B CN107931450B (en) | 2019-06-14 |
Family
ID=61935515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710987278.6A Active CN107931450B (en) | 2017-10-20 | 2017-10-20 | The wheeled crimping method of airplane hydraulic pressure pressurized strut oscillating bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107931450B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068420A (en) * | 2018-07-17 | 2018-12-21 | 中山市康舒美电器有限公司 | A kind of quartz heating-pipe |
| CN115255874A (en) * | 2022-07-28 | 2022-11-01 | 四川航天烽火伺服控制技术有限公司 | Joint bearing closing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004025250A (en) * | 2002-06-26 | 2004-01-29 | Denso Corp | Calking apparatus |
| JP2006125456A (en) * | 2004-10-27 | 2006-05-18 | Nsk Ltd | Shell type needle bearing manufacturing method |
| CN201026559Y (en) * | 2007-03-20 | 2008-02-27 | 永城煤电集团有限责任公司 | Hand-swing type bearing dismounting machine for support roller |
| CN102072260A (en) * | 2010-12-07 | 2011-05-25 | 成都飞机工业（集团）有限责任公司 | Closing-in device of joint bearing with spherical surface |
| CN203917657U (en) * | 2014-05-05 | 2014-11-05 | 燕山大学 | The oscillating bearing roll riveting erecting device of three taper rollers is housed |
| CN204953617U (en) * | 2015-09-17 | 2016-01-13 | 苏州轴承厂股份有限公司 | Punching press outer ring bearing vertical hydraulic trimming machine |
-
2017
- 2017-10-20 CN CN201710987278.6A patent/CN107931450B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004025250A (en) * | 2002-06-26 | 2004-01-29 | Denso Corp | Calking apparatus |
| JP2006125456A (en) * | 2004-10-27 | 2006-05-18 | Nsk Ltd | Shell type needle bearing manufacturing method |
| CN201026559Y (en) * | 2007-03-20 | 2008-02-27 | 永城煤电集团有限责任公司 | Hand-swing type bearing dismounting machine for support roller |
| CN102072260A (en) * | 2010-12-07 | 2011-05-25 | 成都飞机工业（集团）有限责任公司 | Closing-in device of joint bearing with spherical surface |
| CN203917657U (en) * | 2014-05-05 | 2014-11-05 | 燕山大学 | The oscillating bearing roll riveting erecting device of three taper rollers is housed |
| CN204953617U (en) * | 2015-09-17 | 2016-01-13 | 苏州轴承厂股份有限公司 | Punching press outer ring bearing vertical hydraulic trimming machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068420A (en) * | 2018-07-17 | 2018-12-21 | 中山市康舒美电器有限公司 | A kind of quartz heating-pipe |
| CN115255874A (en) * | 2022-07-28 | 2022-11-01 | 四川航天烽火伺服控制技术有限公司 | Joint bearing closing device |
| CN115255874B (en) * | 2022-07-28 | 2023-11-14 | 四川航天烽火伺服控制技术有限公司 | Joint bearing closing-in device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107931450B (en) | 2019-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Wheel crimping method for joint bearing of aircraft hydraulic actuator Effective date of registration: 20220113 Granted publication date: 20190614 Pledgee: Wuhan Rural Commercial Bank Co.,Ltd. Dongxihu sub branch Pledgor: WUHAN HANGDA AERO SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2022420000009 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230403 Granted publication date: 20190614 Pledgee: Wuhan Rural Commercial Bank Co.,Ltd. Dongxihu sub branch Pledgor: WUHAN HANGDA AERO SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2022420000009 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Wheel rolling method for aircraft hydraulic actuator joint bearings Effective date of registration: 20230404 Granted publication date: 20190614 Pledgee: Wuhan Rural Commercial Bank Co.,Ltd. Dongxihu sub branch Pledgor: WUHAN HANGDA AERO SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2023420000148 |