CN101363075A - Processing method for concentrated peening to blade - Google Patents
Processing method for concentrated peening to blade Download PDFInfo
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- CN101363075A CN101363075A CNA2008101560325A CN200810156032A CN101363075A CN 101363075 A CN101363075 A CN 101363075A CN A2008101560325 A CNA2008101560325 A CN A2008101560325A CN 200810156032 A CN200810156032 A CN 200810156032A CN 101363075 A CN101363075 A CN 101363075A
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- peening
- shot
- blade
- spray gun
- stress
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Abstract
The invention relates to a centralized shot blasting processing method of a tenon tooth of a blade, which can precisely control stress of various parts of the tenon tooth of the blade and can improve the fatigue property of the tenon tooth parts of the blade, thus prolonging the service life of the last-stage blade and the second last-stage blade of a steam turbine. The processing method is characterized in that: the centralized shot blasting of the tenon tooth of the blade is carried out by adopting a numerical control shot blasting machine. The process parameters of the shot blasting are as follows: the pressure of compressed air is 0.1MPa-0.6MPa, the nozzle diameter of a spray gun is phi 5mm-15mm, the distance between the spray gun and the shot blasting surface is 50mm-300mm, the travel speed of the spray gun is 10mm/min-500mm/min, the included angle between the spray gun and the shot blasting surface is 5-90 degrees, the comprehensive stress depth is controlled within the range of 0mm-0.5mm, and the compressive stress is controlled within the range of 0MPa-800MPa.
Description
Technical field
The present invention relates to the tenon tooth processing technique field of blade, be specially the working method of the tenon tooth of blade being concentrated shot-peening.
Background technology
At present China's steam turbine last stage, second last stage blade in use, the weakest position is blade tenon tooth position.Through the blade of long-term operation, repeated stress is born at a certain temperature for a long time in above-mentioned position, and the tenon tooth position reaches easy generation fatigue cracking and destroys.Therefore, in order to improve final stage, second last stage blade tenon tooth position fatigue resistance, adopt special warfare that the specific position at this position is carried out particular processing.
Shot-peening is the effective ways that improve the fatigue property of material, but traditional many blade shot-peenings all adopt many spray guns shot-peening, and many shower nozzles by-passing portions pressure, cause the pressure of each shower nozzle lower, radian is little, and its spray angle is different, does not firmly concentrate, be difficult for spraying, and can not satisfy the stress requirement of a certain privileged site.
Summary of the invention
At the problems referred to above, the invention provides the working method of the tenon tooth of blade being concentrated shot-peening, it can accurately control the stress at each position of blade tenon tooth, improves the fatigue property at blade tenon tooth position, thereby the final stage of steam turbine, the work-ing life of second last stage blade are prolonged.
Its technical scheme is such:
It is characterized in that: adopt the numerical control shotblasting machine that the tenon tooth of blade is concentrated shot-peening.
It is further characterized in that: the processing parameter during shot-peening is
Compressed air pressure: 0.1MPa～0.6MPa
Spray tip diameter: Φ 5mm～Φ 15mm
Spray gun is from bead blasted surfaces distance: 50mm～300mm
Spray gun translational speed: 10mm/min～500mm/min
Spray gun and bead blasted surfaces angle: 5 °～90 °
Stress degree of depth control: 0mm～0.5mm
Stress control: 0MPa～800MPa;
The processing step of described shot-peening is:
(1), selects mouthful a nozzle, the position of adjusting spray gun and treating spray plane, spray gun and bead blasted surfaces angle: 5 °～90 ° for use for footpath Φ 5mm-Φ 15mm;
(2), select pill for use, pellet diameters is at 0.5mm～2mm;
(3), adjust compressed air pressure between 0.1MPa～0.6MPa;
(4), adjust the movement velocity 10mm/min-500mm/min of spray gun;
(5), adjust spray gun and bead blasted surfaces apart from 50mm-300mm;
(6), first product is being carried out the forward and backward of shot-peening, carry out the inspection of A Er piece stress, test block is being installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in test block, the shot-peening stress that checking shot-peening parameter obtains with the product shot-peening.
(7), with blade according to process Installation in the shot-peening anchor clamps of special use, location, locking, fixing;
(8), working procedure, to target shot-peening district carry out 1-3 all over shot peening strength be the shot-peening of 0.45mmA-0.50mmA camber;
(9), ordering parameter, working procedure, to target shot-peening district carry out 1-2 all over shot peening strength be the shot-peening of 0.25mmA-0.30mmA;
(10), unload and cleaning, cleaning blade to surperficial no-sundries.
Adopt aforesaid method that the blade root surface is strengthened, owing to adopt the numerical control shotblasting machine that the tenon tooth of blade is concentrated shot-peening, Pen position can stress like this, and the position of switching can be adjusted in good time, thereby can meet the requirements of hard power value.
Embodiment
Adopt the numerical control shotblasting machine that the tenon tooth of blade is concentrated shot-peening.
Below in conjunction with embodiment the course of processing of the present invention is described:
Embodiment 1
(1), select mouthful a nozzle for use for footpath Φ 5mm, adjust spray gun and the position for the treatment of spray plane, spray gun and bead blasted surfaces angle: 5 °, spray gun is from bead blasted surfaces distance: 300mm
(2), select pill, pellet diameters 2mm for use;
(3), adjust compressed air pressure 0.35MPa;
(4), adjust the movement velocity 255mm/min of spray gun;
Shot peening strength control: 0.10mmA
Stress degree of depth control: 0.5mm
Stress control: 800MPa;
(6), first product is being carried out the forward and backward of shot-peening, carry out the inspection of A Er piece stress, test block is being installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in test block, the shot-peening stress that checking shot-peening parameter obtains with the product shot-peening.
(7), with blade according to process Installation in the shot-peening anchor clamps of special use, location, locking, fixing;
(8), working procedure, to the target shot-peening district shot-peening that to carry out 1 time shot peening strength be the 0.45mmA camber;
(9), ordering parameter, working procedure is to the target shot-peening district shot-peening that to carry out 1 time shot peening strength be 0.25mmA;
(10), unload and cleaning, cleaning blade to surperficial no-sundries.
Embodiment 2
(1), select mouthful a nozzle for use for footpath Φ 10mm, adjust spray gun and the position for the treatment of spray plane, spray gun and bead blasted surfaces angle: 90 °, spray gun is from bead blasted surfaces distance: 50mm
(2), select pill for use, pellet diameters is at 1.25mm;
(3), adjust compressed air pressure at 0.1MPa;
(4), adjust the movement velocity 10mm/min of spray gun;
Shot peening strength control: 0.80mmA
Stress degree of depth control: 0mm
Stress control: 0MPa;
(6), first product is being carried out the forward and backward of shot-peening, carry out the inspection of A Er piece stress, test block is being installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in test block, the shot-peening stress that checking shot-peening parameter obtains with the product shot-peening.
(7), with blade according to process Installation in the shot-peening anchor clamps of special use, location, locking, fixing;
(8), working procedure, to the target shot-peening district shot-peening that to carry out 2 times shot peening strengths be the 0.50mmA camber;
(9), ordering parameter, working procedure is to the target shot-peening district shot-peening that to carry out 2 times shot peening strengths be 0.30mmA;
(10), unload and cleaning, cleaning blade to surperficial no-sundries.
Embodiment 3
(1), select mouthful a nozzle for use for footpath Φ 15mm, adjust spray gun and the position for the treatment of spray plane, spray gun and bead blasted surfaces angle: 47.5 °, spray gun is from bead blasted surfaces distance: 175mm
(2), select pill for use, pellet diameters is at 0.5mm;
(3), adjust compressed air pressure at 0.6MPa;
(4), adjust the movement velocity 500mm/min of spray gun;
Shot peening strength control: 0.45mmA
Stress degree of depth control: 0.25mm
Stress control: 400MPa;
(6), first product is being carried out the forward and backward of shot-peening, carry out the inspection of A Er piece stress, test block is being installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in test block, the shot-peening stress that checking shot-peening parameter obtains with the product shot-peening.
(7), with blade according to process Installation in the shot-peening anchor clamps of special use, location, locking, fixing;
(8), working procedure, to the target shot-peening district shot-peening that to carry out 3 times shot peening strengths be the 0.475mmA camber;
(9), ordering parameter, working procedure is to the target shot-peening district shot-peening that to carry out 2 times shot peening strengths be 0.275mmA;
(10), unload and cleaning, cleaning blade to surperficial no-sundries.
Claims (3)
1, the tenon tooth of blade is concentrated the working method of shot-peening, be it is characterized in that: adopt the numerical control shotblasting machine that the tenon tooth of blade is concentrated shot-peening.
2, concentrate the working method of shot-peening according to the described tenon tooth to blade of claim 1, it is characterized in that: the processing parameter of shot-peening is compressed air pressure: 0.1MPa～0.6MPa, spray tip diameter: Φ 5mm～Φ 15mm, spray gun are from bead blasted surfaces distance: 50mm～300mm, spray gun translational speed: 10mm/min～500mm/min, spray gun and bead blasted surfaces angle: 5 °～90 °, stress degree of depth control: 0mm～0.5mm, stress control: 0MPa～800MPa.
3, concentrate the working method of shot-peening according to the described tenon tooth to blade of claim 1, it is characterized in that: the processing step of described shot-peening is:
(1), selects mouthful a nozzle, the position of adjusting spray gun and treating spray plane, spray gun and bead blasted surfaces angle: 5 °～90 ° for use for footpath Φ 5mm～Φ 15mm;
(2), select pill for use, pellet diameters is at 0.5mm～2mm;
(3), adjust compressed air pressure between 0.1MPa～0.6MPa;
(4), adjust the movement velocity 10mm/min～500mm/min of spray gun;
(5), adjust spray gun and bead blasted surfaces apart from 50mm～300mm;
(6), first product is being carried out the forward and backward of shot-peening, carry out the inspection of A Er piece stress, test block is being installed in the special shot-peening anchor clamps, use the processing parameter identical that shot-peening is carried out in test block, the shot-peening stress that checking shot-peening parameter obtains with the product shot-peening.
(7), with blade according to process Installation in the shot-peening anchor clamps of special use, location, locking, fixing;
(8), working procedure, to the target shot-peening district shot-peening that to carry out 1～3 time shot peening strength be 0.45mmA～0.50mmA camber;
(9), ordering parameter, working procedure is to the target shot-peening district shot-peening that to carry out 1～2 time shot peening strength be 0.25mmA～0.30mmA;
(10), unload and cleaning, cleaning blade to surperficial no-sundries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101560325A CN101363075A (en) | 2008-09-26 | 2008-09-26 | Processing method for concentrated peening to blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101560325A CN101363075A (en) | 2008-09-26 | 2008-09-26 | Processing method for concentrated peening to blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101363075A true CN101363075A (en) | 2009-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101560325A Pending CN101363075A (en) | 2008-09-26 | 2008-09-26 | Processing method for concentrated peening to blade |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927458A (en) * | 2010-07-13 | 2010-12-29 | 国电联合动力技术有限公司 | Method for treating surface of fan blade |
| CN103114184A (en) * | 2012-12-07 | 2013-05-22 | 无锡透平叶片有限公司 | Method of improving shot blasting surface fineness of stainless steel blades |
| CN104625967A (en) * | 2014-12-24 | 2015-05-20 | 上海振华重工集团(南通)传动机械有限公司 | Shot blasting treatment method for increasing stress of gear workpiece |
| CN105500216A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Shot peening strengthening technique of middleware of hub of helicopter rotor system |
| CN112338814A (en) * | 2020-10-29 | 2021-02-09 | 中国航发南方工业有限公司 | Composite shot blasting method for turbine disk |
-
2008
- 2008-09-26 CN CNA2008101560325A patent/CN101363075A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927458A (en) * | 2010-07-13 | 2010-12-29 | 国电联合动力技术有限公司 | Method for treating surface of fan blade |
| CN101927458B (en) * | 2010-07-13 | 2012-08-22 | 国电联合动力技术有限公司 | Method for treating surface of fan blade |
| CN103114184A (en) * | 2012-12-07 | 2013-05-22 | 无锡透平叶片有限公司 | Method of improving shot blasting surface fineness of stainless steel blades |
| CN104625967A (en) * | 2014-12-24 | 2015-05-20 | 上海振华重工集团(南通)传动机械有限公司 | Shot blasting treatment method for increasing stress of gear workpiece |
| CN105500216A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Shot peening strengthening technique of middleware of hub of helicopter rotor system |
| CN105500216B (en) * | 2016-01-20 | 2017-09-12 | 哈尔滨飞机工业集团有限责任公司 | Helicopter rotor system propeller hub center piece stress peening process method |
| CN112338814A (en) * | 2020-10-29 | 2021-02-09 | 中国航发南方工业有限公司 | Composite shot blasting method for turbine disk |
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Open date: 20090211 |