CN117506640A - Double-layer blisk blade profile vibration polishing method - Google Patents
Double-layer blisk blade profile vibration polishing method Download PDFInfo
- Publication number
- CN117506640A CN117506640A CN202311254395.3A CN202311254395A CN117506640A CN 117506640 A CN117506640 A CN 117506640A CN 202311254395 A CN202311254395 A CN 202311254395A CN 117506640 A CN117506640 A CN 117506640A
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- Prior art keywords
- blade
- blisk
- polishing
- double
- shaped rubber
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- 238000005498 polishing Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000001681 protective effect Effects 0.000 claims abstract description 51
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000003746 surface roughness Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000003801 milling Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to a double-layer blisk blade profile vibration polishing method, which specifically comprises the following steps: selecting a vibration polishing machine tool according to the structural form of the blisk: a rotary vibration finishing machine without a center island; the edges of the blades of the double-layer blisk are protected; performing long-time vibration polishing on the double-layer blisk blade; dismantling the U-shaped rubber protective sleeve; polishing the protected part of the double-layer blisk blade; and (5) performing short-time vibration polishing processing on the double-layer blisk blade. According to the invention, the edge protection of the blade is realized, the vibration polishing time is prolonged, most of the area of the surface of the blade is polished by the vibration polishing, the manual polishing workload is greatly reduced, the problem of long manual polishing period of the double-layer integral blade disc is solved, and the total processing period can be shortened to 30% by the method; the processing efficiency and the surface integrity are greatly improved, and the development period is shortened; the blade size is ensured to be qualified, and the blade size out-of-tolerance caused by vibration polishing is avoided.
Description
Technical Field
The invention belongs to the technical field of blisk finishing processing, and particularly relates to a double-layer blisk blade profile vibration finishing method.
Background
The double-layer blisk of the aero-engine is a rotor part with two-stage blisks connected into a whole and is a key part. The fatigue strength requirement is high, and the surface roughness value requirement of the blade is low. The blank is an integral die forging, the blade part is formed by milling, the surface roughness is generally between Ra0.8 and Ra1.6, and further finishing processing is still needed. The traditional finishing processing method is to hold tools such as oilstones, sand paper and the like for manual polishing, and then to carry out vibration finishing for a short time to improve the surface problem of the blade, so as to reduce the removal amount of the front edge and the rear edge as much as possible. However, the method has the problems of large manual polishing difficulty, large workload, long period and unstable polishing quality because the blades are mutually shielded and the space is narrow.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a double-layer blisk blade profile vibration polishing method.
A double-layer blisk blade profile vibration polishing method specifically comprises the following steps:
step one: selecting a vibration polishing machine tool according to the structural form of the blisk;
step two: the edges of the blades of the double-layer blisk are protected;
step three: performing long-time vibration polishing on the double-layer blisk blade;
step four: dismantling the U-shaped rubber protective sleeve;
step five: polishing the protected part of the double-layer blisk blade;
step six: and (5) performing short-time vibration polishing processing on the double-layer blisk blade.
In the first step, a rotary vibration finishing machine without a central island is selected according to the structural characteristics of the blisk, a cylindrical cavity is arranged in a process groove of the rotary vibration finishing machine without the central island, and the blisk can be placed in the center of the process groove for processing.
In the second step, the edge of the blade is required to be protected before the vibration polishing, and the protection is characterized in that the blade is not fallen off in the processing process of the vibration polishing and is easy to remove after the processing; the front edge and the rear edge of the blade are provided with U-shaped rubber protective sleeves which are fixed through ultraviolet light gel.
The method for protecting the blade edge comprises the following steps:
(1) preparing a U-shaped rubber protective sleeve with the length of 15m, wherein the specification is phi 1 multiplied by 3, and the U-shaped rubber protective sleeve is sleeved on the whole length of the front edge and the rear edge of the blade, except for a blade root R, and the length of the U-shaped rubber protective sleeve is equal to the whole length of the front edge and the rear edge according to the required metering;
(2) cutting the U-shaped rubber protective sleeves needed by the upper layer and the lower layer according to the measured lengths of the front edge and the rear edge;
(3) wiping the front and rear edges of the blade and an extension area of 10mm by using special wiping paper for the blade to dip acetone;
(4) the U-shaped rubber protective sleeve is filled with ultraviolet light gel after wearing the protective glove;
(5) sleeving the U-shaped rubber protective sleeve filled with ultraviolet light gel on the whole length of the front edge and the rear edge of the blade, except for a blade root R, and attaching the profile;
(6) the U-shaped rubber protective sleeves on each blade are uniformly irradiated by the ultraviolet point light source when the ultraviolet protective glasses are worn and the ultraviolet protective clothing is worn, so that the U-shaped rubber protective sleeves are firmly fixed on the blades.
In the third step, the processing time of the vibration polishing is 6 hours.
In the fourth step, the U-shaped rubber protective sleeve is heated through a hot air gun, and the U-shaped rubber protective sleeve is quickly removed.
And in the fifth step, polishing the area protected by the U-shaped rubber protective sleeve.
The front and rear 5mm areas protected by the U-shaped rubber protective sleeve were polished.
In the sixth step, the vibration polishing processing time is 1 hour.
The beneficial effects of the invention are as follows: according to the invention, the edge protection of the blade is realized, the vibration polishing time is prolonged, only the small part of the area of the surface of the blade, which is shielded by the protective sleeve, needs to be manually polished, the manual polishing workload is greatly reduced, the problem of long manual polishing period of the double-layer integral blade disc is solved, and the total processing period can be shortened to 30% by the method; the processing efficiency and the surface integrity are greatly improved, and the development period is shortened; the blade size is ensured to be qualified, and the blade size out-of-tolerance caused by vibration polishing is avoided.
The blisk part is used as an indispensable part of a turbofan aeroengine, a low-pressure compressor and a high-pressure compressor are used, and the number of the blisk part in a single engine can be up to more than 10, so that the method has wide application prospect in the manufacturing of blisk parts in the industry. The economic benefit is mainly reflected in reducing the manual polishing and repairing labor hour, improving the processing efficiency and avoiding the waste loss, and is in direct proportion to the processing quantity of the parts.
Drawings
FIG. 1 is a schematic illustration of a double-deck blisk according to an embodiment of the present invention;
FIG. 2 is a diagram of a rotary vibration finishing machine with a center island;
FIG. 3 is a physical diagram of a rotary vibration finishing machine without a center island;
FIG. 4 is a schematic view of a process tank of a rotary vibration finishing machine without a center island;
FIG. 5 is a schematic view of a U-shaped rubber boot employed in the present invention;
FIG. 6 is a schematic view of blade protection during processing in accordance with the present invention;
Detailed Description
For better explanation of the present invention, for easy understanding, the technical solution and effects of the present invention will be described in detail below by way of specific embodiments with reference to the accompanying drawings.
The principle of vibration polishing is free abrasive barreling finishing technology, and the excitation source generated by the unbalanced motor drives the abrasive to micro-impact, scratch and grind the surface of the workpiece to improve the surface stress state of the workpiece, reduce the surface roughness value of the workpiece and improve the surface quality of the workpiece.
The method for polishing the double-layer blisk by adopting the double-layer blisk blade profile vibration polishing method provided by the invention comprises the following steps:
step one: selecting proper vibration polishing machine tool according to structural form of blisk
As shown in figure 1, the blisk has the structural characteristics that the middle is a disk body, thin-wall blades are uniformly distributed on the outermost circumference, the whole mass of a part is heavy, and the outer-circle blades are easy to bruise and bend, so that a machine tool with the blisk fixed relative to the machine tool position in the polishing process is required to be selected, only the contact between abrasive materials and the part is realized, and the rolling and collision caused by free vibration polishing of the part are avoided. As shown in fig. 2, the annular process groove of the rotary vibration finishing machine with the island at the center is suitable for small parts without clamping and is processed in batches. Therefore, the rotary vibration finishing machine without a center island is selected for the structural characteristics of the blisk, as shown in fig. 3. The unbalanced motor of the rotary vibration finishing machine without the center island is arranged below the process groove, the material box is arranged below the tail end of the conveyor belt, as shown in fig. 4, a cylindrical cavity is arranged in the process groove, and the blisk can be arranged in the center of the process groove for processing.
Step two: protecting the blade edge of a double-layer blisk
In order to remove milling marks on the blade surface, reduce the surface roughness value and reduce the manual polishing workload, a longer vibration polishing process time is required, and the longer vibration polishing time can generate excessive removal amount on the edge, which is not acceptable. Therefore, the blade edges need to be protected before vibration finishing. The protection is that the vibration polishing does not fall off in the processing process and is easy to remove after processing. The U-shaped rubber protective sleeves are arranged at the front edge and the rear edge of the blade and are fixed through ultraviolet light gel, so that a good protection effect is achieved. Specific:
(1) a15 m long U-shaped rubber protective sleeve is prepared, the specification is phi 1 multiplied by 3, as shown in fig. 5, the U-shaped rubber protective sleeve is sleeved on the whole length of the front edge and the rear edge of the blade, except for a blade root R, as shown in fig. 6, the required length is measured according to the metering, and the length of the U-shaped rubber protective sleeve is equal to the whole length of the front edge and the rear edge.
(2) The U-shaped rubber protection sleeves needed by the upper layer 39 blades and the lower layer 49 blades are cut according to the lengths of the measured front edge and the measured rear edge, the front edge and the rear edge of each blade are respectively provided with a protection sleeve, 78U-shaped rubber protection sleeves are needed in total for the upper layer, and 98U-shaped rubber protection sleeves are needed for the lower layer.
(3) The front and rear edges of the blade and the 10mm extension area were wiped clean with a blade-specific wiping paper dipped with acetone.
(4) The U-shaped rubber protective sleeve is filled with ultraviolet light gel when the protective glove is worn.
(5) And (3) sleeving the U-shaped rubber protective sleeve filled with ultraviolet photogel on the whole length of the front edge and the rear edge of the blade (except for the blade root R), and attaching the U-shaped rubber protective sleeve to the molded surface.
(6) The U-shaped rubber protective sleeves on each blade are uniformly irradiated by the ultraviolet point light source when the ultraviolet protective glasses are worn and the ultraviolet protective clothing is worn, so that the U-shaped rubber protective sleeves are firmly fixed on the blades.
Step three: long-time vibration polishing processing for double-layer blisk blade
Through an actual vibration polishing test, the surface roughness is smaller than Ra0.4 through visual inspection, amplification detection and a roughness meter detection mode, no milling trace exists, and the vibration polishing processing time is determined to be 6 hours.
Step four: dismantling U-shaped rubber protective sleeve
The U-shaped rubber protective sleeve is heated by the hot air gun, and the U-shaped rubber protective sleeve is quickly removed.
Step five: polishing the protected part of the double-layer blisk blade
The 5mm area of the leading and trailing edges protected by the U-shaped rubber boot was polished manually.
Step six: short-time vibration polishing processing for double-layer blisk blade
Through an actual vibration polishing test, the surface roughness is smaller than Ra0.4, no milling trace exists, the cross section outline size of the blade is qualified, and the vibration polishing processing time is determined to be 1 hour through visual inspection, amplification detection, roughness meter detection and three-coordinate outline size detection modes.
Claims (9)
1. The double-layer blisk blade profile vibration polishing method is characterized by comprising the following steps of:
step one: selecting a vibration polishing machine tool according to the structural form of the blisk;
step two: the edges of the blades of the double-layer blisk are protected;
step three: performing long-time vibration polishing on the double-layer blisk blade;
step four: dismantling the U-shaped rubber protective sleeve;
step five: polishing the protected part of the double-layer blisk blade;
step six: and (5) performing short-time vibration polishing processing on the double-layer blisk blade.
2. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: in the first step, a rotary vibration finishing machine without a central island is selected according to the structural characteristics of the blisk, a cylindrical cavity is arranged in a process groove of the rotary vibration finishing machine without the central island, and the blisk can be placed in the center of the process groove for processing.
3. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: in the second step, the edge of the blade is required to be protected before the vibration polishing, and the protection is characterized in that the blade is not fallen off in the processing process of the vibration polishing and is easy to remove after the processing; the front edge and the rear edge of the blade are provided with U-shaped rubber protective sleeves which are fixed through ultraviolet light gel.
4. A method of double-deck blisk airfoil vibration finishing according to claim 3, wherein: the method for protecting the blade edge comprises the following steps:
(1) preparing a U-shaped rubber protective sleeve with the length of 15m, wherein the specification is phi 1 multiplied by 3, and the U-shaped rubber protective sleeve is sleeved on the whole length of the front edge and the rear edge of the blade, except for a blade root R, and the length of the U-shaped rubber protective sleeve is equal to the whole length of the front edge and the rear edge according to the required metering;
(2) cutting the U-shaped rubber protective sleeves needed by the upper layer and the lower layer according to the measured lengths of the front edge and the rear edge;
(3) wiping the front and rear edges of the blade and an extension area of 10mm by using special wiping paper for the blade to dip acetone;
(4) the U-shaped rubber protective sleeve is filled with ultraviolet light gel after wearing the protective glove;
(5) sleeving the U-shaped rubber protective sleeve filled with ultraviolet light gel on the whole length of the front edge and the rear edge of the blade, except for a blade root R, and attaching the profile;
(6) the U-shaped rubber protective sleeves on each blade are uniformly irradiated by the ultraviolet point light source when the ultraviolet protective glasses are worn and the ultraviolet protective clothing is worn, so that the U-shaped rubber protective sleeves are firmly fixed on the blades.
5. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: in the third step, the processing time of the vibration polishing is 6 hours.
6. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: in the fourth step, the U-shaped rubber protective sleeve is heated through a hot air gun, and the U-shaped rubber protective sleeve is quickly removed.
7. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: and in the fifth step, polishing the area protected by the U-shaped rubber protective sleeve.
8. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: the front and rear 5mm areas protected by the U-shaped rubber protective sleeve were polished.
9. The method for oscillating and polishing a double-deck blisk profile according to claim 1, wherein: in the sixth step, the vibration polishing processing time is 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311254395.3A CN117506640A (en) | 2023-09-27 | 2023-09-27 | Double-layer blisk blade profile vibration polishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311254395.3A CN117506640A (en) | 2023-09-27 | 2023-09-27 | Double-layer blisk blade profile vibration polishing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117506640A true CN117506640A (en) | 2024-02-06 |
Family
ID=89761465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311254395.3A Pending CN117506640A (en) | 2023-09-27 | 2023-09-27 | Double-layer blisk blade profile vibration polishing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117506640A (en) |
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2023
- 2023-09-27 CN CN202311254395.3A patent/CN117506640A/en active Pending
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