CN109570936A - The processing method of torque tube component - Google Patents
The processing method of torque tube component Download PDFInfo
- Publication number
- CN109570936A CN109570936A CN201910014421.2A CN201910014421A CN109570936A CN 109570936 A CN109570936 A CN 109570936A CN 201910014421 A CN201910014421 A CN 201910014421A CN 109570936 A CN109570936 A CN 109570936A
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- China
- Prior art keywords
- sealing ring
- reference axis
- boss
- torque tube
- tube component
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Classifications
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a kind of processing methods of torque tube component, by being roughly ground before nickel plating to reference axis leading portion and projection section, it is that there are surpluses for the subsequent deformation in Ni-Speed, refines reference axis back segment, reference axis leading portion and boss are refined after nickel plating, to meet technique requirement.Process of this method from corase grinding to the end, centre do not allow to correct, and avoiding torque tube component, there are stress, influence the fitting of reference axis back segment nickel coating；The present invention uses on the one hand deformation that the mode of grinding is torque tube component in Ni-Speed, and there are surpluses, on the other hand ensure that gap and bounce require.
Description
Technical field
The present invention relates to engine part manufacture fields, particularly, are related to a kind of processing method of torque tube component.
Background technique
It is found after dissection model machine power turbine transmission shaft component, torque tube components part material and model machine part are not
Symbol, according to model machine part dissection and analysis as a result, increasing nickel plating requirement to torque tube component back segment and support ring surface.
1, nickel plating thickness is 0.025~0.04, and boss and long axis inner hole clearance requirement are 0.06~0.08, inorganic to add
Tolerance, therefore the method that take throwing to repair after nickel plating guarantees gap, difficulty is bigger；
2, to increase after nickel plating except cyanogen and solidification by cement, be spent 250 except cyanogen temperature has more；And it is being glued and cured process
Middle torque tube component is easily deformed, and boss bounce, which is difficult to ensure, cannot meet the technological requirements.
Summary of the invention
The present invention provides a kind of processing methods of torque tube component, difficult to solve the part deformation in Ni-Speed
With meet technique requirement the technical issues of.
The technical solution adopted by the invention is as follows:
A kind of processing method of torque tube component, after torque tube component includes: reference axis leading portion and reference axis
Section, is equipped with bar portion connecting the two between reference axis leading portion and reference axis back segment, bar portion periphery is equipped with boss, the processing method packet
Include following steps:
Reference axis leading portion and boss are roughly ground, there are surpluses for the deformation in subsequent handling；
Refine reference axis back segment；
In reference axis back segment nickel plating；
Refine reference axis leading portion and boss.
Further, further comprising the steps of before refining reference axis leading portion and boss after reference axis back segment nickel plating:
Sealing ring is assembled, sealing ring is assembled using tooling is imported, matches after so that sealing ring is passed through reference axis leading portion and boss with bar portion interference
It closes；
Importing tooling includes the tapered guide pin with the cooperation of reference axis leading portion end face, and tapered guide pin is big close for slowly supportting
Sealing ring is sheathed on reference axis leading portion by seal ring by being applied to the external force on sealing ring；
Importing tooling further includes the guide sleeves with bar portion cooperation, and guide sleeves include the tapered guide set of two semi-rings；Guidance
The internal diameter of set is matched with the outer diameter of bar portion, and the external force by being applied to sealing ring moves the sealing ring being set on reference axis leading portion
It moves to guide sleeves, guide sleeves and sealing ring is then shifted into boss, and sealing ring is individually moved to boss, then sealed
Ring passes through boss and bar portion cooperates.
Further, further comprising the steps of after assembly sealing ring: glued seals ring is glued sealing ring and bar portion,
And it is glued sealing ring close to one end of reference axis leading portion and the end face of boss.
Further, further comprising the steps of before roughly grinding reference axis leading portion and boss: grinding torque tube component
Centre bore；Then turning reference axis leading portion chamfering.
Further, it roughly grinds further comprising the steps of after reference axis leading portion and boss: being ground the end face of boss；Then it goes
Except the burr of boss outer peripheral surface.
Further, it refines further comprising the steps of after reference axis leading portion and boss: the chamfering at turning boss edge；So
The burr at boss edge is removed afterwards.
Further, it roughly grinds further comprising the steps of after reference axis leading portion and boss: detection torque tube component
Balance；And examine whether the size of torque tube component and bounce meet technique requirement.
Further, assemble sealing ring the following steps are included:
Sealing ring is inserted on tapered guide pin and slowly supports by the Internal hole positioning of tapered guide pin and reference axis leading portion end face
Greatly, then seal ring set is located on reference axis leading portion by being applied to the external force of sealing ring；
Using the tapered guide set of two semi-rings, position the outer diameter of itself and bar portion, by the external force for being applied to sealing ring
Sealing ring is moved in guide sleeves；
Guide sleeves and sealing ring are moved to boss by being applied to the external force of guide sleeves, and by sealing ring be individually moved to
On boss；
Sealing ring is passed through boss and is bonded with bar portion by the external force by being applied to sealing ring, and sealing ring is close to reference axis
One end of leading portion is bonded with the end face of boss.
Further, before glued seals ring is the following steps are included: be assembled to bar portion corresponding position for sealing ring, in bar portion
The position gluing of upper corresponding installation sealing ring, and the end face gluing being bonded on boss with sealing ring；And solidify at normal temperature；
Then heating cure again makes sealing ring and bar portion splicing and sealing ring is close to one end of reference axis leading portion and the end face glue of boss
It connects.
Further, in the nickel plating of reference axis back segment and glued seals ring step, torque tube component is in vertical shape
State, to reduce the deformation of torque tube component.
The invention has the following advantages:
The processing method of torque tube component of the invention, by before nickel plating to reference axis leading portion and projection section into
Row corase grinding is the subsequent deformation in Ni-Speed there are surplus, refines reference axis back segment, after nickel plating to reference axis leading portion and
Boss fine grinding, to meet technique requirement.Process of this method from corase grinding to the end, centre do not allow to correct, and avoid surveying and turn round benchmark
There are stress for shaft assembly, influence the fitting of reference axis back segment nickel coating；The present invention uses the mode of grinding on the one hand to turn round base to survey
There are surpluses for deformation of the fiducial axis component in Ni-Speed, on the other hand ensure that gap and bounce require.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to accompanying drawings, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the torque tube component of the preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the importing tooling installation sealing ring of the preferred embodiment of the present invention；
Fig. 3 is the importing tooling installation another structural schematic diagram of sealing ring of the preferred embodiment of the present invention.
Drawing reference numeral explanation:
10, reference axis leading portion；20, reference axis back segment；30, boss；40, sealing ring；50, tooling is imported；51, guidance pin；
52, guide sleeves.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to Fig.1, the preferred embodiment of the present invention provides a kind of processing method of torque tube component, surveys and turns round benchmark
Shaft assembly includes: reference axis leading portion 10, reference axis back segment 20, and linker is equipped between reference axis leading portion 10 and reference axis back segment 20
The periphery of the bar portion of fiducial axis leading portion 10 and reference axis back segment 20, bar portion is equipped with boss 30.The torque tube module processing method
The following steps are included:
Reference axis leading portion 10 and boss 30 are roughly ground, there are surpluses for the deformation in subsequent handling；
Refine reference axis back segment 20；
In 20 nickel plating of reference axis back segment；
Reference axis leading portion 10 and boss 30 are refined, to meet technique requirement.
In the present embodiment, in the outer peripheral surface of reference axis back segment 20 and inner hole nickel plating, before before nickel plating to reference axis
Section 10 and boss 30 are roughly ground, and for there are surpluses for the deformation of reference axis leading portion 10 and boss 30 in Ni-Speed, then refine base
Fiducial axis back segment 20 refines reference axis leading portion 10 and boss 30 after nickel plating, it is made to meet technique requirement.In addition, corase grinding benchmark
Axis leading portion 10 and boss 30 and fine grinding reference axis back segment 20 are in no particular order, it is only necessary to complete before nickel plating.
The processing method of the present embodiment, by being roughly ground before nickel plating to reference axis leading portion 10 and boss 30, and made allowance
0.2, with there are surpluses for the subsequent deformation in Ni-Speed, reference axis back segment 20 is refined, to reference axis leading portion after nickel plating
10 and boss 30 refine, with meet technique requirement.Process of this method from corase grinding to the end, centre do not allow to correct, because becoming
There are stress after shape correction, will affect the fitting of nickel coating on reference axis back segment 20；Present invention one side by the way of grinding
For deformation of the torque tube component in Ni-Speed, there are surpluses, on the other hand ensure that bounce and clearance requirement, meet
Technique requirement.
Preferably, further comprising the steps of before precision grinding process after Ni-Speed: assembly sealing ring 40 utilizes importing work
50 assembly sealing rings 40 are filled, are interference fitted after so that sealing ring 40 is passed through reference axis leading portion 10 and boss 30 with bar portion.
Referring to Fig. 2 and Fig. 3, importing tooling 50 includes the tapered guide pin 51 with the cooperation of 10 end face of reference axis leading portion, taper
Guiding pin 51 to be used for, slowly support is big by sealing ring 40, and sealing ring 40 is set in benchmark by the external force being applied on sealing ring 40
On axis leading portion 10；
Importing tooling 50 further includes the guide sleeves 52 with bar portion cooperation, and guide sleeves 52 include the tapered guide of two semi-rings
Set；The internal diameter of guide sleeves 52 is matched with the outer diameter of bar portion, by the external force that is applied on sealing ring 40 by sealing ring 40 from benchmark
It is moved on axis leading portion 10 in guide sleeves 52, guide sleeves 52 and sealing ring 40 is then shifted into boss 30 together by external force, and
Sealing ring 40 is individually moved to boss 30, then sealing ring 40 passes through boss 30 and bar portion cooperates, and sealing ring 40 leans on
One end of nearly reference axis leading portion 10 is bonded with the end face of boss 30.
In the present embodiment, sealing ring 40 will assemble after nickel plating, because to carry out dehydrogenation after nickel plating, dehydrogenation temperature has
Left and right being spent 250, the high temperature during Ni-Speed and dehydrogenation will lead to the failure of sealing ring 40, influence 40 performance of sealing ring more.
In the present embodiment, sealing ring 40 assembly technology the following steps are included:
1) it, cleans: dipping in acetone with de- cotton and sealing ring 40 is cleaned；
2) it, heats: sealing ring 40 being put into 85 degree to 90 degree water and is heated 5 minutes；
3) it, installs: assembling sealing ring 40 using tooling 50 is imported；
4) it, checks: checking 40 appearance of sealing ring, it is ensured that situations such as 40 surface of sealing ring is without scratching, cracking.
Specifically, sealing ring 40 is packed into from reference axis leading portion 10, and sealing ring 40 is elastic sealing ring 40, is not easy sharply to increase
Greatly, in order to avoid influencing its performance in use.By tapered guide pin 51, by sealing ring 40, slowly support is big, will seal
Ring 40 passes through reference axis leading portion 10 and boss 30, is interference fitted with bar portion, and sealing ring 40 is close to the one of reference axis leading portion 10
End is bonded with the end face of boss 30.
40 installation steps of sealing ring are as follows: sealing ring 40 is assembled from reference axis leading portion 10 along Fig. 2 arrow direction, first by taper
Guidance pin 51 is put into reference axis leading portion 10 and is positioned, and then by 40 sets of sealing ring on tapered guide pin 51, slowly support is big,
Sealing ring 40 is shifted on reference axis leading portion 10 by the external force being applied on sealing ring 40, that is, on first step surface；
Then it is positioned using the tapered guide set of two semi-rings with bar portion cooperation, by the external force that is applied on sealing ring 40 by sealing ring
On the outer peripheral surface of 40 push-in guide sleeves 52；Guide sleeves 52 and sealing ring 40 are shifted into boss 30, boss 30 namely second together
Sealing ring 40 is individually moved to boss 30 by external force, then crosses second step surface, by sealing ring 40 by a step surface
It is bonded with bar portion, and close 10 one end of reference axis leading portion of sealing ring 40 is bonded with the end face of boss 30, completes sealing ring 40
Assembly.In the present embodiment, boss 30 has 4, and sealing ring 40 will cross first boss 30 close to reference axis leading portion 10.
Preferably, further comprising the steps of after assembly sealing ring 40: glued seals ring 40 makes sealing ring 40 and bar portion glue
It connects, and sealing ring 40 is glued close to one end of reference axis leading portion 10 and the end face of boss 30.
In the present embodiment, the process flow of splicing is as follows:
1) it, leads glue: getting A, B group two component；
2) it, cleans: cleaning sealing ring 40 with acetone and be glued tool；
3) it, mixes glue: 2 groups of glue is sufficiently stirred；
4), gluing: glue is uniformly applied in bar portion and boss 30；
5), normal temperature cure: solidify 8 hours at normal temperature；
6) the fitting situation of sealing ring 40, is checked；
7) it, heating cure: 2 hours of heat preservation solidification under 150 degree of environment of sealing ring 40, then cools to room temperature.
In the present embodiment, before sealing ring 40 being assembled to bar portion corresponding position, the corresponding installation sealing ring in bar portion
40 position gluings, and the gluing on the end face of one end that boss 30 is bonded with sealing ring 40.So that sealing ring 40 and bar portion glue
It connects, sealing ring 40 is glued close to one end of reference axis leading portion 10 and the end face of boss 30.In addition, being used during heating cure
Special tooling hangs torque tube component vertically, to reduce the deformation of torque tube component in Bonding Process.
The processing method of the present embodiment, by corase grinding reference axis leading portion and boss, with to be subsequent in nickel plating process and assembly
The deformation occurred during glued seals ring there are surplus, assemble refine after sealing ring and glued seals ring reference axis leading portion and
Boss, the present embodiment guarantee that bounce requires by way of grinding, meet the technique requirement of torque tube component.In addition,
In nickel plating process and splicing process, torque tube component is hung vertically using special tooling, to reduce in nickel plating and glue
Deformation in termination process.
Preferably, further comprising the steps of before corase grinding reference axis leading portion 10 and boss 30:
1) torque tube component semi-finished product, are got, which does not install sealing ring 40；
2) torque tube component, is corrected, and head-stamp is carried out to each component；
3), it is ground the centre bore of torque tube component；
4), the chamfering of turning reference axis leading portion 10.
Optionally, it roughly grinds reference axis leading portion 10 and boss 30 is further comprising the steps of later:
1), it is ground the outer circle of 30 end face of boss；
2) burr on boss 30, is removed, in order to avoid sealing ring 40 is scratched when installing sealing ring 40.
In the present embodiment, it is ground the end face of the boss 30 cooperated with sealing ring 40, is avoided when installing sealing ring 40, it is convex
The burr of 30 end face of platform scratches sealing ring 40, to influence the performance of sealing ring 40.The burr on boss 30 is removed later in base
The outer peripheral surface of fiducial axis back segment 20 and inner hole nickel plating, nickel plating thickness are 0.025~0.04.
Preferably, it refines reference axis leading portion 10 and boss 30 is further comprising the steps of later:
1), the edge chamfer of turning boss 30；
2) flash removed, is removed；
3) balance of torque tube component, is tested；
4) whether the size and bounce for, examining torque tube component meet the requirements.
Torque tube module processing method of the invention, by being roughly ground before nickel plating to reference axis leading portion and boss, and
For the subsequent deformation in Ni-Speed, there are surpluses, refine the nickel plating of reference axis back segment later to reference axis leading portion and boss essence
Mill, to meet technique requirement.Process of this method from corase grinding to the end, centre does not allow to correct, because existing after distortion correction
Stress will affect the fitting of reference axis back segment nickel coating；The present invention uses the mode of grinding on the one hand for torque tube component
There are surpluses for deformation in Ni-Speed, on the other hand ensure that gap and bounce require.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of processing method of torque tube component, the torque tube component includes: reference axis leading portion (10) and base
Fiducial axis back segment (20) is equipped with bar portion connecting the two, institute between the reference axis leading portion (10) and the reference axis back segment (20)
Bar portion periphery is stated equipped with boss (30), which is characterized in that the processing method the following steps are included:
The reference axis leading portion (10) and boss (30) are roughly ground, there are surpluses for the deformation in subsequent handling；
Refine the reference axis back segment (20)；
In reference axis back segment (20) nickel plating；
Refine the reference axis leading portion (10) and boss (30).
2. the processing method of torque tube component according to claim 1, which is characterized in that in the reference axis back segment
(20) further comprising the steps of before refining the reference axis leading portion (10) and boss (30) after nickel plating:
It assembles sealing ring (40), assembles the sealing ring (40) using tooling (50) are imported, the sealing ring (40) is made to pass through institute
Reference axis leading portion (10) and the boss (30) is stated to be interference fitted with the bar portion afterwards；
Import tooling (50) include the tapered guide pin (51) with reference axis leading portion (10) end face cooperation, the taper
Guidance pin (51), will be described close by the external force being applied on the sealing ring (40) for slowly supportting the big sealing ring (40)
Seal ring (40) is sheathed on the reference axis leading portion (10)；
Import tooling (50) further include the guide sleeves (52) with bar portion cooperation, and the guide sleeves (52) include two and half
The tapered guide set of ring；The internal diameter of the guide sleeves (52) is matched with the outer diameter of the bar portion, by being applied to the sealing ring
(40) sealing ring (40) being set on the reference axis leading portion (10) is moved on the guide sleeves (52) by external force, then
The guide sleeves (52) and sealing ring (40) are shifted to the boss (30), and the sealing ring (40) is individually moved to described
On boss (30), then the sealing ring (40) passes through the boss (30) and the bar portion cooperates.
3. the processing method of torque tube component according to claim 2, which is characterized in that assemble the sealing ring
(40) further comprising the steps of after:
It is glued the sealing ring (40), is glued the sealing ring (40) and the bar portion, and lean on the sealing ring (40)
One end of the nearly reference axis leading portion (10) and the end face of the boss (30) are glued.
4. the processing method of torque tube component according to claim 1, which is characterized in that before roughly grinding the reference axis
It is further comprising the steps of before section (10) and the boss (30):
It is ground the centre bore of the torque tube component；Then reference axis leading portion (10) chamfering described in turning.
5. the processing method of torque tube component according to claim 1, which is characterized in that before roughly grinding the reference axis
It is further comprising the steps of after section (10) and the boss (30):
It is ground the end face of the boss (30)；Then the burr of the boss (30) outer peripheral surface is removed.
6. the processing method of torque tube component according to claim 1, which is characterized in that before refining the reference axis
It is further comprising the steps of after section (10) and the boss (30):
The chamfering at boss described in turning (30) edge；Then the burr at the boss (30) edge is removed.
7. the processing method of torque tube component according to claim 1, which is characterized in that before roughly grinding the reference axis
It is further comprising the steps of after section (10) and the boss (30):
Detect the balance of the torque tube component；And examine whether the size of the torque tube component and bounce accord with
Close technique requirement.
8. the processing method of torque tube component according to claim 2, which is characterized in that assembly sealing ring (40) packet
Include following steps:
The Internal hole positioning of the tapered guide pin (51) and reference axis leading portion (10) end face, the sealing ring (40) is inserted in
On the tapered guide pin (51) and slowly support is big, then by being applied to the external force of the sealing ring (40) for the sealing ring
(40) it is set on the reference axis leading portion (10)；
Using the tapered guide set of two semi-rings, position the outer diameter of itself and the bar portion, by being applied to the sealing ring
(40) sealing ring (40) is moved on the guide sleeves (52) by external force；
It is moved to by being applied to the external force of the guide sleeves (52) for the guide sleeves (52) and the sealing ring (40) described
Boss (30), and the sealing ring (40) is individually moved on the boss (30)；
The sealing ring (40) are passed through the boss (30) and the bar portion by the external force by being applied to the sealing ring (40)
Fitting, and the sealing ring (40) is bonded close to one end of the reference axis leading portion (10) with the end face of the boss (30).
9. the processing method of torque tube component according to claim 3, which is characterized in that be glued the sealing ring
(40) the following steps are included:
It is corresponding in the bar portion that the sealing ring is installed before the sealing ring (40) is assembled to the bar portion corresponding position
(40) position gluing, and the end face gluing being bonded on the boss (30) with the sealing ring (40)；And at normal temperature
Solidification；Then heating cure again makes the sealing ring (40) and bar portion splicing and the sealing ring (40) is close to described
One end of reference axis leading portion (10) and the end face of the boss (30) are glued.
10. the processing method of torque tube component according to claim 3, which is characterized in that
In reference axis back segment (20) nickel plating and it is glued in sealing ring (40) step, the torque tube component is in
Vertical state, to reduce the deformation of the torque tube component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014421.2A CN109570936B (en) | 2019-01-04 | 2019-01-04 | Machining method of torsion measurement reference shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014421.2A CN109570936B (en) | 2019-01-04 | 2019-01-04 | Machining method of torsion measurement reference shaft assembly |
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| CN109570936A true CN109570936A (en) | 2019-04-05 |
| CN109570936B CN109570936B (en) | 2020-05-19 |
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| CN201910014421.2A Active CN109570936B (en) | 2019-01-04 | 2019-01-04 | Machining method of torsion measurement reference shaft assembly |
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| CN112008445A (en) * | 2020-08-29 | 2020-12-01 | 中国航发南方工业有限公司 | Blind hole slender shaft inner supporting method |
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| CN112008603A (en) * | 2020-08-29 | 2020-12-01 | 中国航发南方工业有限公司 | Blind hole slender shaft inner supporting device |
| CN112008445A (en) * | 2020-08-29 | 2020-12-01 | 中国航发南方工业有限公司 | Blind hole slender shaft inner supporting method |
| CN112008603B (en) * | 2020-08-29 | 2021-08-06 | 中国航发南方工业有限公司 | Blind hole slender shaft inner supporting device |
| CN112008445B (en) * | 2020-08-29 | 2022-01-04 | 中国航发南方工业有限公司 | Blind hole slender shaft inner supporting method |
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| CN109570936B (en) | 2020-05-19 |
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