CN105415162A - High-accuracy surface fine machining and finish machining method for thin-wall wheel discs - Google Patents
High-accuracy surface fine machining and finish machining method for thin-wall wheel discs Download PDFInfo
- Publication number
- CN105415162A CN105415162A CN201510800770.9A CN201510800770A CN105415162A CN 105415162 A CN105415162 A CN 105415162A CN 201510800770 A CN201510800770 A CN 201510800770A CN 105415162 A CN105415162 A CN 105415162A
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- Prior art keywords
- vibration
- minutes
- wheel discs
- wheel disc
- machining
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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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
- B24B31/064—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers the workpieces being fitted on a support
-
- 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
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
Abstract
The invention discloses a high-accuracy surface fine machining and finish machining method for thin-wall wheel discs. The rotary shaft type vibrating finish machining process is adopted for machining the surfaces of the wheel discs. The method specifically comprises the machining steps of (1), protecting the labyrinth parts of the wheel discs through black tape before machining, wherein the height of abrasive material is higher than the total height of the wheel discs and a clamp by more than 100 mm; (2), clamping the wheel discs on the clamp, installing the clamp on a pneumatic chuck of a machine tool, starting the machine tool and carrying out trial vibration; (3), carrying out vibrating finish machining on the surfaces of the sides A of the wheel discs and then carrying out forward vibration for 30 minutes and reverse vibration for 30 minutes; (4), halting the machine tool, clamping the wheel discs again, carrying out vibrating finish machining on the surfaces of the sides B of the wheel discs and then carrying out forward vibration for 30 minutes and reverse vibration for 30 minutes; (5), halting the machine tool, discharging the clamp and the wheel discs and clearing redundant material on the surfaces of the wheel discs. According to the method, high-quality and efficient surface fine machining is realized.
Description
Technical field
The invention belongs to aero engine technology field, relate to piece surface retrofit and Finishing, provide a kind of effective reduction Part Surface Roughness value and change the processing method of surface stress, being mainly used in surface fine processing and the skin processing of the slewing parts such as the various disk ring of aero-engine, drum barrel.
Background technology
In engine, the part such as disk ring, drum barrel, axle journal is all core rotatable parts and key components of engine, is work under high temperature, high pressure, high-revolving adverse circumstances.This kind of part material adopts the manufacture of the difficult-to-machine material such as high temperature alloy, titanium alloy mostly, dimension precision requirement is high, technical conditions are strict, and require high to surface quality of workpieces, surface integrity, the height of its crudy directly has influence on service life and the security reliability of engine.
Traditional skin processing is as the polishing of sheave surface, and be on engine lathe, use emery cloth strip, adopt manual polishing mode to process, due to opening wide property of turbine disk die cavity difference, manual polishing is almost unreachable, and roughness not easily ensures, quality is unstable.To the processing at all kinds of edges such as limit, hole, lace, trough rim, generally adopt that file, oilstone and meche are manual removes burr and the process of polishing completes the processing of all kinds of edge, processing back edge dimensional uniformity is poor.Traditional cooked mode relies on the experience of operator too much and level of skill completes processing, and artifical influence factor is large, and quality is unstable.Along with improving constantly of aero-engine performance, be badly in need of being optimized improvement to these crucial tumbler surface fine processing and finishing process, realize automation, precision processing.
Summary of the invention
One is the object of the present invention is to provide can effectively to reduce Part Surface Roughness value, obtain high marginal dimension uniformity, and change the processing method of piece surface stress state, meet aero-engine of new generation to the requirement of coiling the strict surface quality of the crucial rotational parts such as axle, drum barrel, axle journal and surface integrity.
Technical scheme of the present invention is:
1, the determination of piece surface and edge polishing processing method
Because aero-engine requires high to the surface quality of the crucial rotational components such as dish, drum barrel and surface integrity, traditional manual operations can not meet the requirement of part serviceability to the processing mode that piece surface and all kinds of edge carry out polishing, therefore new technology scheme have employed a kind of spin axis formula vibration finishing processing technology, after vibration finishing, Part Surface Roughness value reduces by 1 ~ 2 grade, the dimensional uniformity at all kinds of edge improves more than 40%, meets part service life and security reliability.
2, vibration finishing process equipment and principle
Spin axis formula vibrating burnisher is have selected according to the specification shape of part.Vibration finishing is processed by the relative motion of abrasive material and part, produce the grinding effect of trace, remove sharp limit and the minute protrusions of piece surface, impel Part Surface Roughness value to reduce, piece surface produces residual compressive stress simultaneously, thus improves the surface integrity of part.Spin axis formula vibrating burnisher can positive and negative Double-directional rotary, around self rotation, can revolve round the sun around the alignment of shafts simultaneously, abrasive material case periodically pumps, thus part and abrasive contact and grinding are accelerated, the multi-direction friction of large area, realizes efficient skin processing.
Vibration finishing adds man-hour, first wheel disc one side surface is passed down through special fixture, diskware is arranged on the pneumatic chuck of lathe, part is driven to enter in abrasive material by the lifting of axis system, under the effect of many-sided kinematic systems such as planet circular system, motion hopper, skin processing is carried out to the outer surface of wheel disc part, die cavity and end face, abrasive material and piece surface is produced extrude, the motion such as scratching, realize the micro-cutting highly-efficient processing to part.
3, abrasive material is selected
Abrasive components is selected: can select pottery or white fused alumina, ensure that the surface quality requirements that part is strict.
Abrasive size, shape are selected: according to each surface configuration of part and edge polishing processing request, select specification to be the polygon rhombus of 3 × 3 × 4mm (oblique triangle) abrasive material.
4, Special Clamps Design
Realized the connection of part and equipment during vibration finishing by special fixture, special fixture comprises lower locating ring 1, upper locating ring 2, switching cartridge module 3, hold-down bolt 4, connecting bolt 5; Switching cartridge module 3 is made up of chassis 6, cylinder 7, connecting ring 8, and chassis 6 to be set in bottom cylinder 7 and to be welded as a whole with cylinder 7, and adapter ring 8 is set in cylinder 7 top and is welded as a whole with cylinder 7; Upper locating ring 2 is located at cylinder 7 above and be connected by connecting bolt 5 with adapter ring 8, and lower locating ring 1 is connected by hold-down bolt 4 with upper locating ring 2.Hold-down bolt 4 quantity is 8, and connecting bolt 5 quantity is 6.
5, vibration finishing procedure of processing
(1) protect wheel disc comb teeth portion position with special friction tape before processing, friction tape is wound around comb tooth and is no less than 5 layers, and load abrasive material by spin axis formula bobbing machine, abrasive material need exceed more than the total height 100mm of wheel disc and fixture;
(2) wheel disc clamping is arranged on the pneumatic chuck of lathe on fixture and by fixture, starts lathe, carry out examination and shake, after confirming situation without exception, formally process wheel disc;
(3) to wheel disc
side surface carries out vibration finishing processing, rotates forward vibration 30 minutes, reversion vibration 30 minutes;
(4) shut down, clamping wheel disc again, to wheel disc
side surface carries out vibration finishing processing, rotates forward vibration 30 minutes, reversion vibration 30 minutes;
(5) shut down, unload lower clamp and wheel disc, clean-up wheel panel surface fifth wheel, dip in the water stain and dust of acetone wiping wheel panel surface with absorbent cotton, after wiping, leave standstill 5-10 minute, make the acetone volatilization of sheave surface completely.
6, the machined parameters of vibration finishing processing
Vibration frequency: 60 ± 5HZ;
Mill liquid: lathe Special grinding liquid;
Mill liquid spraying time: 3min;
Mill liquid interval time: 3min;
The vibration finishing time: 60 minutes (rotating forward vibration 30 minutes, reversion vibration 30 minutes).
The present invention has following useful effect:
The present invention technically has important breakthrough and innovation at the crucial rotational components surface finishing of engine, efficiently solve that the manual polishing of the part such as the turbine disk, drum barrel is large, of poor quality by artifical influence factor, the manual polishing of the semiclosed die cavity of part is unreachable, roughness not easily ensures, the technical barrier that polishing back edge dimensional uniformity is poor, quality is unstable.
By designing a kind of spin axis formula vibration finishing processing method, after making processing, Part Surface Roughness value reduces 1-2 grade, surface topography after vibration finishing has and takes on a new look greatly, superficial makings is evenly regular, surface stress changes into compression by the tension before vibration finishing, and value of compressive stress is between-200MPa ~-500MPa.All kinds of edge adopts vibration finishing processing rear surface quality good, surface roughness value is low, marginal dimension is even, and dimensional uniformity can reach 90%-100%, and the surface finishing for aero-engine key components and parts provides practicable process and machined parameters.
Accompanying drawing explanation
Fig. 1 is that wheel disc of the present invention carries out scheme of installation on fixture;
Fig. 2 is clamping schematic diagram in wheel disc process of the present invention;
Fig. 3 is clamp structure schematic diagram of the present invention;
Fig. 4 is fixture transfer extend neck modular construction schematic diagram of the present invention;
In figure: 1, lower locating ring; 2, upper locating ring; 3, switching cartridge module; 4, hold-down bolt; 5, connecting bolt; 6, chassis; 7, cylinder; 8, connecting ring; 9, vibration finishing region (except comb tooth).
Detailed description of the invention
Describe the present invention below in conjunction with drawings and Examples.
1, design of part
As shown in Figure 1, turbine disk part belongs to major diameter labyrinth thin-walled dish like members, and with mounting edge structure, mounting edge and wheel disc disc form semiclosed deep-small hole, opens wide property extreme difference.Wherein wheel rim, disc, mounting edge place cylindrical, end face and disc deep-small hole inside surface roughness require strict, are Ra0.80 μm, adopt manual polishing mode to process in the past always, due to opening wide property of turbine disk die cavity difference, manual polishing is almost unreachable, and roughness not easily ensures, quality is unstable.
2, clamp structure
The processing of turbine disk vibration finishing adopts a set of special fixture clamping parts, and this special fixture comprises lower locating ring 1, upper locating ring 2, switching cartridge module 3, hold-down bolt 4, connecting bolt 5; Switching cartridge module 3 is made up of chassis 6, cylinder 7, connecting ring 8, and chassis 6 to be set in bottom cylinder 7 and to be welded as a whole with cylinder 7, and adapter ring 8 is set in cylinder 7 top and is welded as a whole with cylinder 7; Upper locating ring 2 is located at cylinder 7 above and be connected by connecting bolt 5 with adapter ring 8, and lower locating ring 1 is connected by hold-down bolt 4 with upper locating ring 2.Hold-down bolt 4 quantity is 8, and connecting bolt 5 quantity is 6.
3, procedure of processing
(1) protect turbine disk comb teeth portion position with special friction tape before processing, friction tape is wound around 5 layers, comb tooth, and the polygon rhombus abrasive material of filling 3 × 3 × 4mm pottery, abrasive material need exceed the total height 150mm of part and fixture.
(2) first by clamping position shown in Fig. 1, part is arranged between the lower locating ring 1 of fixture and upper locating ring 2, and with 8 hold-down bolt 4 compressing components, then by fixture and fitting turnover 180 °, as shown in Figure 2, be arranged on by fixture on the pneumatic chuck of lathe, start lathe, examination is shaken 3 minutes, after confirming situation without exception, can formal processing parts.
(3) to part
side surface carries out vibration finishing processing, pass through special fixture, diskware is arranged on the pneumatic chuck of lathe, part is driven to enter in abrasive material by the lifting of axis system, under the effect of many-sided kinematic systems such as planet circular system, motion hopper, skin processing is carried out to the outer surface of wheel disc part, die cavity and end face, abrasive material and piece surface is produced extrude, the motion such as scratching, realize the micro-cutting highly-efficient processing to part.Rotate forward vibration 30 minutes, reversion vibration 30 minutes.
(4) shut down, unload lower clamp and part, unclamp hold-down bolt 4, by fitting turnover 180 °, benchmark
part is arranged between lower locating ring 1 and upper locating ring 2 (see Fig. 1) by side upward again, and after compressing, upset 180 ° (see Fig. 2 clamping schematic diagram), is reinstalled on the pneumatic chuck of lathe, to part by fixture
side surface carries out vibration finishing processing (process principle is the same), rotates forward vibration 30 minutes, reversion vibration 30 minutes.
(5) shut down, unload lower clamp and part, cleaning piece surface fifth wheel, dip in the water stain and dust in acetone wiper element surface with absorbent cotton, after wiping, leave standstill 5 minutes, make the acetone volatilization of piece surface completely.
4, vibration finishing machined parameters
Vibration frequency: 60 ± 5HZ;
Mill liquid: lathe Special grinding liquid;
Mill liquid spraying time: 3min;
Mill liquid interval time: 3min;
The vibration finishing time: 60 minutes (rotating forward vibration 30 minutes, reversion vibration 30 minutes).
A kind of high accuracy thin-walled sheave surface retrofit of the present invention and polishing processing method, can be used for aero-engine disk ring, the surface of the slewing parts such as drum barrel finally processes, breach sheave surface skin processing for a long time, operator's level of skill and experience is relied on to use emery cloth strip on engine lathe, manual polishing mode is adopted to complete the pattern of processing, efficiently solve due to opening wide property of part die cavity difference, manual polishing is almost unreachable, roughness not easily ensures, marginal dimension uniformity is poor, the technical barrier of quality instability, achieve the processing of high-quality and efficient surface fine.After processing, part proves after testing, Part Surface Roughness value reduces 2 grades, the dimensional uniformity at all kinds of edge improves more than 40%, and working (machining) efficiency improves 50%, for the surface finishing of aero-engine labyrinth dish drum part provides practicable technical method.By carrying out the processing of batch to typical complex structure turbine disk part, achieve obvious technique effect and economic benefit.Benefit 7,500,000 yuan can be created year, economize on the use of funds 1,700,000 yuan year.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. the retrofit of high accuracy thin-walled sheave surface and a polishing processing method, is characterized in that, adopt spin axis formula vibration finishing processing technology to process sheave surface, concrete procedure of processing is as follows:
(1) process front friction tape to protect wheel disc comb teeth portion position, friction tape is wound around comb tooth and is no less than 5 layers, and load abrasive material by spin axis formula bobbing machine, abrasive material need exceed more than the total height 100mm of wheel disc and fixture;
(2) wheel disc clamping is arranged on the pneumatic chuck of lathe on fixture and by fixture, starts lathe, carry out examination and shake, after confirming situation without exception, formally process wheel disc;
(3) to wheel disc
side surface carries out vibration finishing processing, rotates forward vibration 30 minutes, reversion vibration 30 minutes;
(4) shut down, clamping wheel disc again, to wheel disc
side surface carries out vibration finishing processing, rotates forward vibration 30 minutes, reversion vibration 30 minutes;
(5) shut down, unload lower clamp and wheel disc, clean-up wheel panel surface fifth wheel, dip in the water stain and dust of acetone wiping wheel panel surface with absorbent cotton, after wiping, leave standstill 5-10 minute, make the acetone volatilization of sheave surface completely.
2. according to a kind of high accuracy thin-walled sheave surface retrofit according to claim 1 and polishing processing method, it is characterized in that, the machined parameters of described vibration finishing processing is as follows:
Vibration frequency: 60 ± 5HZ;
Mill liquid: lathe Special grinding liquid;
Mill liquid spraying time: 3min;
Mill liquid interval time: 3min;
The vibration finishing time: 60 minutes, comprise and rotate forward vibration 30 minutes and vibration 30 minutes of reversing.
3. according to a kind of high accuracy thin-walled sheave surface retrofit according to claim 1 and polishing processing method, it is characterized in that, described abrasive material is pottery or white fused alumina.
4. according to a kind of high accuracy thin-walled sheave surface retrofit according to claim 3 and polishing processing method, it is characterized in that, described abrasive material is the polygon rhombus abrasive material of 3 × 3 × 4mm pottery.
5. according to a kind of high accuracy thin-walled sheave surface retrofit according to claim 1 and polishing processing method, it is characterized in that, described fixture comprises lower locating ring (1), upper locating ring (2), switching cartridge module (3), hold-down bolt (4), connecting bolt (5); Described switching cartridge module (3) is made up of chassis (6), cylinder (7), connecting ring (8), described chassis (6) is set in cylinder (7) bottom and is welded as a whole with cylinder (7), and described adapter ring (8) is set in cylinder (7) top and is welded as a whole with cylinder (7); Described upper locating ring (2) is located at cylinder (7) above and be connected by connecting bolt (5) with adapter ring (8), and described lower locating ring (1) is connected by hold-down bolt (4) with upper locating ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510800770.9A CN105415162A (en) | 2015-11-19 | 2015-11-19 | High-accuracy surface fine machining and finish machining method for thin-wall wheel discs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510800770.9A CN105415162A (en) | 2015-11-19 | 2015-11-19 | High-accuracy surface fine machining and finish machining method for thin-wall wheel discs |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107088753A (en) * | 2016-07-28 | 2017-08-25 | 中航湖南通用航空发动机有限公司 | A kind of turbine disk-like accessory groove edge finishing process and processing unit (plant) |
| CN107755987A (en) * | 2017-11-24 | 2018-03-06 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of processing technology of aero-engine high-pressure compressor rectifier |
| CN110722453A (en) * | 2019-11-19 | 2020-01-24 | 中国航发贵州黎阳航空动力有限公司 | Polishing clamp |
| CN110860953A (en) * | 2019-11-27 | 2020-03-06 | 中国航发沈阳黎明航空发动机有限责任公司 | Vibration finishing processing method for high-temperature alloy disc parts |
| CN111702610A (en) * | 2020-07-07 | 2020-09-25 | 中国航发动力股份有限公司 | Engine wheel disc annular row special-shaped tongue-and-groove sharp edge treatment method |
| CN112077675A (en) * | 2020-09-17 | 2020-12-15 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for improving surface quality of turning of assembly matching part of rectifier by polishing |
| CN112091804A (en) * | 2020-09-11 | 2020-12-18 | 张本辉 | Surface polishing equipment for bonded table tennis balls |
| CN112091235A (en) * | 2020-09-15 | 2020-12-18 | 中国航发贵州黎阳航空动力有限公司 | Powder high-temperature alloy stepped grate vehicle machining method |
| CN113043077A (en) * | 2021-03-17 | 2021-06-29 | 中国航发动力股份有限公司 | Thermal barrier coating finishing process method |
| CN115070599A (en) * | 2022-08-23 | 2022-09-20 | 泰州华丰精密铸造有限公司 | Precision casting polishing device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107088753A (en) * | 2016-07-28 | 2017-08-25 | 中航湖南通用航空发动机有限公司 | A kind of turbine disk-like accessory groove edge finishing process and processing unit (plant) |
| CN107755987A (en) * | 2017-11-24 | 2018-03-06 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of processing technology of aero-engine high-pressure compressor rectifier |
| CN110722453A (en) * | 2019-11-19 | 2020-01-24 | 中国航发贵州黎阳航空动力有限公司 | Polishing clamp |
| CN110860953B (en) * | 2019-11-27 | 2021-04-16 | 中国航发沈阳黎明航空发动机有限责任公司 | Vibration finishing processing method for high-temperature alloy disc parts |
| CN110860953A (en) * | 2019-11-27 | 2020-03-06 | 中国航发沈阳黎明航空发动机有限责任公司 | Vibration finishing processing method for high-temperature alloy disc parts |
| CN111702610B (en) * | 2020-07-07 | 2021-05-25 | 中国航发动力股份有限公司 | Engine wheel disc annular row special-shaped tongue-and-groove sharp edge treatment method |
| CN111702610A (en) * | 2020-07-07 | 2020-09-25 | 中国航发动力股份有限公司 | Engine wheel disc annular row special-shaped tongue-and-groove sharp edge treatment method |
| CN112091804A (en) * | 2020-09-11 | 2020-12-18 | 张本辉 | Surface polishing equipment for bonded table tennis balls |
| CN112091235A (en) * | 2020-09-15 | 2020-12-18 | 中国航发贵州黎阳航空动力有限公司 | Powder high-temperature alloy stepped grate vehicle machining method |
| CN112077675A (en) * | 2020-09-17 | 2020-12-15 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for improving surface quality of turning of assembly matching part of rectifier by polishing |
| CN112077675B (en) * | 2020-09-17 | 2021-11-16 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for improving surface quality of turning of assembly matching part of rectifier by polishing |
| CN113043077A (en) * | 2021-03-17 | 2021-06-29 | 中国航发动力股份有限公司 | Thermal barrier coating finishing process method |
| CN115070599A (en) * | 2022-08-23 | 2022-09-20 | 泰州华丰精密铸造有限公司 | Precision casting polishing device |
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Application publication date: 20160323 |