CN220944190U - Turning and grinding integrated fixture for inner spacer ring of high-pressure air compressor of aero-engine - Google Patents
Turning and grinding integrated fixture for inner spacer ring of high-pressure air compressor of aero-engine Download PDFInfo
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- CN220944190U CN220944190U CN202322482175.8U CN202322482175U CN220944190U CN 220944190 U CN220944190 U CN 220944190U CN 202322482175 U CN202322482175 U CN 202322482175U CN 220944190 U CN220944190 U CN 220944190U
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- spacer ring
- inner spacer
- pressing plate
- turning
- supporting base
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- 125000006850 spacer group Chemical group 0.000 title claims abstract description 69
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 238000013461 design Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 230000008521 reorganization Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of aero-engine repair, and discloses a turning and grinding integrated clamp for an inner spacer ring of a high-pressure compressor of an aero-engine, which comprises a supporting base, a top pressing plate and a bolt assembly, wherein the top pressing plate is provided with a supporting base; the supporting base is disc-shaped; the edge of one side end face is circumferentially provided with an annular shoulder which is matched with the small end size of the inner spacer ring, the small end of the inner spacer ring is arranged on the end face of the supporting base and is radially limited through the annular shoulder, the taper of the outer wall of the top pressing plate is the same as that of the inner cavity of the large end of the inner spacer ring, and when the inner spacer ring is used, the top pressing plate is arranged in the inner cavity of the large end of the inner spacer ring, the inner spacer ring is axially pressed between the supporting base and the top pressing plate through the bolt assembly, so that the inner spacer ring is clamped in grinding and turning chamfering, rigidity in a part machining process is effectively enhanced, and machining deformation is prevented. The utility model has simple structure, convenient clamping and low cost, greatly relieves the pressure of spare parts of the spacer ring in the air compressor, and ensures the production period.
Description
Technical Field
The utility model belongs to the technical field of aero-engine repair, and particularly relates to a turning and grinding integrated clamp for an inner spacer ring of a high-pressure compressor of an aero-engine.
Background
The inner spacer is an important part assembled in a high-pressure compressor of an aeroengine, the inner spacer body is of a frustum thin-wall structure, the large end edge is provided with an outward radial annular edge, the small end edge is provided with an inward radial annular edge, and the small end radial annular edge is provided with an annular boss along the axial direction. According to the axial dimension difference of the inner space ring, the inner space ring is divided into 16 groups, the sizes of the inner space ring are sequentially increased from the group 1 to the group 16, the sizes of the inner space ring are only different by 0.051mm, and the inner space ring is required to be matched according to the axial distance of the installation position during assembly. In addition, after the engine is used, the axial assembly space of the inner spacer ring on the air compressor can be changed due to the reasons of working vibration, tiny deformation of matched disc parts on the air compressor and the like, so that the axial dimension of the inner spacer ring does not meet the assembly requirement, and the inner spacer ring is required to be newly selected for assembly during engine maintenance.
Because the inner space ring is produced by a manufacturer with special equipment underwriting qualification and is limited by the production of the type of engine, the practical demand quantity of the inner space ring is limited, so that the number of suppliers for producing the inner space ring at present in China is very small, and the production quantity of the inner space ring is also small. Therefore, the inner space rings purchased at present are basically in large groups, the number of small groups is very small, and the assembly requirements of the small groups cannot be met. The conventional method in the factory is to measure the axial dimension of the inner spacer ring in a plurality of installed compressors for matching, and if the axial dimension meets the assembly requirement of the engine to be maintained, the matched inner spacer ring is detached and then is installed on the high-pressure compressor of the engine to be maintained, so that the workload is high and the time is consumed.
Based on the problem that the required inner space rings have large size difference and are difficult to select, scientific researchers propose that the purchased inner space rings of a large group can be reorganized and processed, or the axial size of the inner space rings of a small group can be increased by spraying a coating, and then the required size range can be achieved by subsequent reorganization and processing. But the assembly requirement is needed to grind and turn the chamfer on the large end face of the inner spacer ring of the high-pressure compressor in the reorganization process, the diameter size of the inner spacer ring is large, the wall thickness is only 1.52 mm-1.78 mm, the inner spacer ring belongs to a typical large-cone angle thin-wall structure, the thin-wall inclination angle is 25 DEG+/-1 DEG, the structure is complex, the clamping is difficult, the deformation is easy to generate in the processing process, the processing rigidity is poor, and the axial size precision of the inner spacer ring is difficult to guarantee.
Disclosure of utility model
In order to solve the problem that the inner spacer is easy to deform due to the special structure of the inner spacer in the process of reorganizing the inner spacer, and the axial dimensional accuracy is difficult to guarantee, the utility model provides a turning and grinding integrated fixture for the inner spacer of a high-pressure compressor of an aeroengine.
The technical scheme of the utility model is as follows: the lathe grinding integrated fixture for the inner spacer ring of the high-pressure compressor of the aeroengine is characterized in that the inner spacer ring body is of a frustum thin-wall structure, an outward radial annular edge is arranged at the edge of a large end, an inward radial annular edge is arranged at the edge of a small end, and an annular boss along the axial direction is arranged at the edge of the radial annular edge of the small end. The turning and grinding integrated clamp comprises a supporting base 1, a top pressing plate 3 and a bolt assembly;
The support base 1 is disc-shaped, an annular convex shoulder is machined on the edge of one side end face along the circumferential direction, and the small end of the inner spacing ring is arranged on the end face of the support base and is radially limited through the annular convex shoulder;
The inner circular surface of the annular shoulder is matched with the end surface and the outer circular surface of the small end annular boss of the inner spacer ring as design references according to the outer circular size of the small end annular boss of the inner spacer ring;
The outer wall of the top pressing plate 3 is conical and the same as the taper of the inner cavity of the large end of the inner spacer ring, and when the top pressing plate is used, the top pressing plate is arranged in the inner cavity of the large end of the inner spacer ring;
a plurality of mounting holes are uniformly distributed on the end surface of the support base around the circumferential direction, and U-shaped holes are arranged between adjacent mounting holes and are used for connecting the support base with a lathe;
The end face of the top pressing plate 3 is provided with a plurality of mounting holes which are coincident with the axes of the mounting holes on the supporting base, and the inner spacing ring is axially limited between the supporting base and the top pressing plate through a bolt assembly.
Further, the concentricity of the annular shoulder relative to the outer circle of the support base is not more than 0.02mm.
Further, the parallelism of the two end faces of the support base is not more than 0.005mm.
Further, a weight-reducing through hole is formed in the support base 1 along the axis.
Further, weight reducing holes are formed in the top pressing plate 3 and located between the adjacent mounting holes.
Further, the supporting base 1 and the top pressing plate 3 are made of 45 # steel.
Further, during grinding, the supporting base 1 is fixedly connected with the grinding machine turntable through an electromagnetic chuck on the grinding machine.
Advantageous effects
1. The fixture is designed to be a supporting base, the inner spacer ring of the high-pressure compressor is coaxially arranged on the supporting base, the annular convex shoulder arranged on the supporting base is used for realizing radial limit of the annular convex platform at the small end of the inner spacer ring, and the pressing plate arranged in the cavity of the inner spacer ring is used for realizing axial compression of the inner spacer ring through the compression nut, so that the rigidity of the inner spacer ring in the processing process is effectively enhanced.
2. The upper end face and the lower end face of the supporting base in the clamp are subjected to grinding processing to ensure parallelism of 0.005mm, the inner circular face of the annular convex shoulder positioned on the upper end face is matched with the end face and the outer circular face of the inner spacer ring small end annular boss as design references according to the outer circular size of the inner spacer ring small end annular boss, and the design references are used as clamping positioning references, so that the processing positioning precision of parts is improved.
3. The design of the outer contour of the top pressing plate in the fixture is consistent with the inclination angle and taper of the inner cavity of the inner spacer ring of the high-pressure compressor, so that the top pressing plate is convenient to install in the inner cavity of the spacer ring, the rigidity of the inner spacer ring in the processing process is effectively enhanced, the deformation generated in the processing process is controlled, and the processing precision is greatly improved.
4. The clamp disclosed by the utility model can be used for clamping in the machining process of two working procedures of grinding and turning of the spacer ring in the air compressor, is convenient to use and avoids the influence of different secondary clamping on the machining precision of parts in the turning process.
5. The fixture has low cost, the repair cost of reorganizing the fixture is only 0.5 ten thousand yuan, 2.6 ten thousand yuan is needed for purchasing 1 inner space ring, 2.1 ten thousand yuan is saved for each repair cost, the spare part pressure is greatly relieved, and the production period is ensured.
Drawings
FIG. 1 is an exploded view of the turning and grinding integrated fixture of the present utility model;
FIG. 2 is a schematic diagram of the positioning and installation of the turning mold integrated fixture of the present utility model.
In the figure: 1-a supporting base; 2-inner space rings; 3-pressing plate; 4-a gasket; 5-a compression bolt.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings and specific examples.
A turning and grinding integrated fixture for a spacer ring in a high-pressure air compressor of an aeroengine comprises a supporting base 1, a top pressing plate 3, a gasket 4 and a compression bolt 5. The support base 1 is disc-shaped, an annular convex shoulder is machined on the edge of the upper end face of the support base, the inner spacer ring 2 of the high-pressure compressor is positioned on the upper end face, the inner diameter of the annular convex shoulder is equal to the outer diameter of the annular convex boss of the small end of the inner spacer ring of the high-pressure compressor, and the annular convex boss of the small end of the inner spacer ring is radially positioned. The concentricity of the annular shoulder relative to the outer circle of the support base is not more than 0.02mm. The top pressing plate 3 is arranged in the inner cavity of the large end of the inner spacer ring and is attached to the step surface in the cavity, and the top pressing plate 3 is connected with the support base 1 through the gasket 4 and the compression bolt 5 to fix the inner spacer ring between the top pressing plate and the support base.
The support base 1 is disc-shaped, the parallelism of the upper end face and the lower end face is not more than 0.005mm through grinding, and 0.005mm is obtained in the embodiment. The edge of the upper end face of the support base is provided with an annular shoulder along the axis, the inner circular face of the annular shoulder is matched according to the outer circular size of the small end annular boss of the inner spacer ring, and the concentricity of the outer circular face of the support base is not more than 0.02mm. Four threaded stepped holes are circumferentially and uniformly distributed on the end face of the support base, and are connected with the top pressing plate 3 through compression bolts, so that the inner spacer ring is fixed between the top pressing plate and the support base. The middle part of the supporting base is provided with a round lightening hole. Four U-shaped holes are uniformly distributed on the end face of the support base and are arranged at intervals with the threaded step holes and communicated with the round lightening holes, and the support base is clamped on the lathe through a T-shaped head bolt special for a disc chuck on the lathe.
The top pressing plate 3 is of a conical disc structure, the outer wall taper is the same as the inner cavity taper of the inner spacer ring of the high-pressure compressor, the top pressing plate is convenient to install in the inner cavity of the inner spacer ring in a matched mode, rigidity in the part machining process is effectively improved, deformation generated in the part machining process is controlled, and machining precision is improved. The middle part of the top pressing plate is provided with a round lightening hole along the axis. Four threaded stepped holes are uniformly distributed on the end face of the pressing plate along the circumferential direction, and the axes of the threaded stepped holes are coincident with the axes of the threaded stepped holes on the supporting base and are used for being connected with the pressing bolts 5 through gaskets 4. A sector lightening hole is further formed in the middle between two adjacent threaded stepped holes.
The supporting base 1 and the top pressing plate 3 are made of 45 # steel.
The installation method for grinding the end face of the inner spacer ring by adopting the turning and grinding integrated fixture comprises the following steps:
a1. The supporting base is fixed on the rotary table through the magnetic force of the electromagnetic chuck of the grinding machine, and the runout of the annular shoulder end face on the supporting base is aligned to be not more than 0.01mm.
A2. the small end of the inner space ring of the high-pressure compressor is downward and is arranged at the annular shoulder of the supporting base.
A3. Installing the top pressing plate on the step surface of the cavity of the inner spacer ring, and adjusting the position alignment of a threaded step hole on the solid top pressing plate and a threaded step hole on the supporting base;
and a4, sequentially placing a gasket 4 and a compression bolt 5 in the threaded stepped hole of the pressing plate, and symmetrically screwing up the 4 bolts to finish clamping before grinding.
And a5, grinding the end face of the large end of the inner spacer, and marking marks along the axial direction on the side walls of the support base and the inner spacer according to the assembly positions of the support base and the inner spacer during grinding after finishing grinding so as to avoid influencing the machining precision due to the difference of the secondary clamping positions during turning.
The method for installing the clamp during the turning of the large end face chamfer of the inner spacer ring comprises the following steps:
b1. 4 lathe special T-shaped head bolts arranged on a lathe chuck penetrate through U-shaped holes of a supporting base, gaskets and nuts are sequentially arranged on the upper end faces of the U-shaped holes in a cling mode, and the 4 nuts are symmetrically screwed; and (3) aligning to ensure that the jumping amount of the end face of the annular shoulder of the support base is not more than 0.01mm and the jumping amount of the diameter of the inner circle is not more than 0.02mm.
B2. The small end of the inner spacer ring of the high-pressure compressor is downward, the marking line during grinding is aligned, and the marking line is arranged at the annular shoulder of the supporting base.
B3. And (3) installing the top pressing plate at the step surface of the cavity of the inner spacer ring, adjusting the position alignment of a threaded step hole on the solid top pressing plate and a threaded step hole on the supporting base, symmetrically screwing 4 bolts, and aligning to ensure that the jumping amount of the excircle of the large end of the inner spacer ring of the high-pressure compressor is not more than 0.051mm, thereby finishing the clamping before turning.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the utility model.
Claims (7)
1. The turning and grinding integrated fixture for the inner spacer ring of the high-pressure compressor of the aeroengine is characterized in that the inner spacer ring body is of a frustum thin-wall structure, the large end edge is provided with an outward radial annular edge, the small end edge is provided with an inward radial annular edge, and the small end radial annular edge is provided with an annular boss along the axial direction; the turning and grinding integrated fixture is characterized by comprising a supporting base (1), a pressing plate (3) and a bolt assembly;
The support base (1) is disc-shaped, an annular convex shoulder is machined at the edge of one side end face along the circumferential direction, and the small end of the inner spacing ring is arranged on the end face of the support base and is radially limited through the annular convex shoulder;
the inner circular surface of the annular shoulder takes the end surface and the outer circular surface of the small end annular boss of the inner spacer ring as design references, and is matched according to the outer circular size of the small end annular boss of the inner spacer ring;
The outer wall of the top pressing plate (3) is conical and the same as the taper of the inner cavity of the large end of the inner spacer ring, and the top pressing plate is arranged in the inner cavity of the large end of the inner spacer ring when in use;
A plurality of mounting holes are uniformly distributed on the end surface of the support base around the circumferential direction, and U-shaped holes are arranged between adjacent mounting holes and are used for connecting the support base with a lathe;
The end face of the top pressing plate (3) is provided with a plurality of mounting holes, the mounting holes are coincident with the axis of the mounting holes on the supporting base, and the inner spacing ring is axially limited between the supporting base and the top pressing plate through the bolt assembly.
2. The turning and grinding integrated fixture according to claim 1, characterized in that the concentricity of the annular shoulder with respect to the outer circle of the support base (1) is not more than 0.02mm.
3. The turning and grinding integrated fixture according to claim 2, wherein the parallelism of the two end surfaces of the support base is not more than 0.005mm.
4. The turning and grinding integrated clamp according to claim 1, wherein the support base (1) is provided with a weight-reducing through hole along an axis.
5. The turning and grinding integrated fixture according to claim 4, wherein weight reducing holes are formed in the pressing plate (3) and located between adjacent mounting holes.
6. The turning and grinding integrated clamp according to any one of claims 1-5, characterized in that the support base (1) and the top pressure plate (3) are made of 45 # steel.
7. The turning and grinding integrated fixture according to claim 6, wherein the supporting base (1) is fixedly connected with the grinding machine turntable through an electromagnetic chuck on the grinding machine during grinding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322482175.8U CN220944190U (en) | 2023-09-13 | 2023-09-13 | Turning and grinding integrated fixture for inner spacer ring of high-pressure air compressor of aero-engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322482175.8U CN220944190U (en) | 2023-09-13 | 2023-09-13 | Turning and grinding integrated fixture for inner spacer ring of high-pressure air compressor of aero-engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220944190U true CN220944190U (en) | 2024-05-14 |
Family
ID=90981562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322482175.8U Active CN220944190U (en) | 2023-09-13 | 2023-09-13 | Turning and grinding integrated fixture for inner spacer ring of high-pressure air compressor of aero-engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220944190U (en) |
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2023
- 2023-09-13 CN CN202322482175.8U patent/CN220944190U/en active Active
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