CN103752983A - Hard-soldering deformation control method for turbine blade and special fixture for hard-soldering - Google Patents
Hard-soldering deformation control method for turbine blade and special fixture for hard-soldering Download PDFInfo
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- CN103752983A CN103752983A CN201310680231.7A CN201310680231A CN103752983A CN 103752983 A CN103752983 A CN 103752983A CN 201310680231 A CN201310680231 A CN 201310680231A CN 103752983 A CN103752983 A CN 103752983A
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- blade
- soldering
- deformation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0018—Brazing of turbine parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
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- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention provides a hard-soldering deformation control method for a turbine blade. The hard-soldering deformation control method for the turbine blade can effectively reduce the hard-soldering deformation of stellite alloy sheets at the steam inlet sides of last-stage large blades of a turbine. The hard-soldering deformation control method for the turbine blade is characterized by comprising the following steps: detecting the hard-soldering deformation and deformation tendency of a test blade by comparing the blade hard-soldering area of the blade before and after the hard-soldering with a blade theoretical model, obtaining a main hard-soldering deformation area and hard-soldering deformation direction of the test blade, and when performing hard-soldering of the stellite alloy sheets to the product blade having the same specification with the test blade, using a special fixture for hard-soldering to apply an over-deformation stress with direction opposite to the hard-soldering deformation direction to the main deformation area of the product blade corresponding to the test blade. The special fixture for hard-soldering comprises a machine tool guide rail connecting seat and multiple groups of chuck mechanisms, wherein the multiple groups of chuck mechanisms are mounted on the machine tool guide rail connecting seat, and the multiple groups of chuck mechanisms are uniformly arranged along the length direction of the hard-soldering area of the stellite alloy sheet of the blade.
Description
Technical field
The present invention relates to the welding deformation control field of large-size steam turbine exhaust stage blade, especially the anti-water erosion brazing deformation of the stellite alloy film control field that relates to last stage vane of steam turbine, is specially a kind of steam turbine large blade brazing deformation control method and soldering Special clamp device.
Background technology
Large-size steam turbine exhaust stage blade leading edge corrodes because of the water droplet souring that stands moist steam in operation process and condense, and is the most effective anti-water erosion measure at present at blade inlet edge soldering stellite alloy film, and by Ge great Design of Steam Turbine, factory is adopted.But, the anti-water erosion soldering of leading edge of last stage vane of steam turbine can produce distortion because of the impact of welding effect, therefore the dimensional accuracy and the blade dimensions correcting value that directly have influence on blade, if weld correction, can cause the destabilizing factors such as brazing defect and residual stress.
Summary of the invention
For the problems referred to above, the invention provides a kind of turbine blade brazing deformation control method, it can effectively reduce the brazing deformation amount of the large blade inlet edge stellite alloy film of steam turbine last stage; For this reason, the present invention also provides a kind of turbine blade leading edge stellite alloy film soldering Special clamp device.
A kind of turbine blade brazing deformation control method, it is characterized in that: the first leading edge soldering stellite alloy film at test blade according to common process, then detect described test blade before soldering, brazing deformation amount and deformation tendency that soldering rear blade brazing area is compared with blade design theoretical model, analyze described brazing deformation amount and deformation tendency, obtain territory, Main Deformation and the brazing deformation direction of pilot blade soldering, according to the territory, Main Deformation of the pilot blade soldering obtaining and brazing deformation direction, when carrying out stellite alloy film soldering with described test with the product blade of blade same specification, use soldering special fixture to apply and the distortional stress of crossing of brazing deformation opposite direction the territory, Main Deformation of the corresponding described pilot blade of described product blade, thereby reach the object of controlling blade brazing deformation.
It is further characterized in that:
Described soldering special fixture applies with the concrete operations of crossing distortional stress of brazing deformation opposite direction the territory, Main Deformation of the corresponding described pilot blade of described product blade, during described product blade clamping, the inner arc bracing or strutting arrangement of described soldering special fixture first with the interior arc shaped surface of described product blade between reserved 0.5mm～4mm gap, then the back of the body arc hold down gag of described soldering special fixture the more described product blade of lower compression convex profile until the interior arc shaped surface of described product blade and the inner arc bracing or strutting arrangement of described soldering special fixture be adjacent to;
The territory, Main Deformation of described pilot blade soldering and deformation direction comprise back edge torsional deflection to arc by inner arc, and the entirety in cross section, place, leaf top is by the inner arc arc canting of supporting or opposing.
Described soldering special fixture, it is characterized in that: it comprises machine tool guideway Connection Block and some groups of chuck mechanisms, described some groups of chuck mechanisms are installed on described machine tool guideway Connection Block, and described some groups of chuck mechanisms are evenly arranged along the length direction of the brazing area of blade stellite alloy film, distance described in two adjacent groups between chuck mechanism is 10cm～20cm, described machine tool guideway Connection Block is installed on machine tool guideway and can, along described machine tool guideway translation, between described machine tool guideway Connection Block and described machine tool guideway, by machine tool guideway lock-screw, locks.
It is further characterized in that:
Described chuck mechanism comprises inner arc bracing or strutting arrangement and back of the body arc hold down gag, described inner arc bracing or strutting arrangement is installed on described machine tool guideway Connection Block, described back of the body arc hold down gag is installed on described machine tool guideway Connection Block by supporting adn fixing device, and described back of the body arc hold down gag is positioned at described inner arc bracing or strutting arrangement top, in the region of blade to be welded between described inner arc bracing or strutting arrangement, back of the body arc hold down gag, and coordinate and compress by described inner arc bracing or strutting arrangement, back of the body arc hold down gag, give described blade to be welded to cross distortional stress simultaneously;
Described inner arc bracing or strutting arrangement comprises inner arc support cylinder and adjusting bearing, and described adjusting bearing is installed on described machine tool guideway Connection Block, and described inner arc support cylinder can be installed in described adjusting bearing up or down;
Described adjusting bearing has vertical holding tank, and described inner arc support cylinder is installed in described holding tank and by the lock-screw locking positioning on described adjusting bearing;
Described adjusting bearing has tapped through hole radially, described tapped through hole and described holding tank UNICOM, described lock-screw front end holds out against the described inner arc support cylinder in described holding tank through after described tapped through hole, and described lock-screw rear end is provided with regulating handle;
Described back of the body arc hold down gag comprises back of the body arc compact heap and back of the body arc clamping screw, described back of the body arc compact heap is installed on described supporting adn fixing device, described supporting adn fixing device is installed on described lathe Connection Block, vertical at right angle setting is on described back of the body arc compact heap movably for described back of the body arc clamping screw, and the lower end of described back of the body arc clamping screw is provided with hold-down head;
Described back of the body arc compact heap has the sliding tray of level, and described back of the body arc clamping screw is vertically through passing through locking nut positioning and locking on described back of the body arc compact heap after described sliding tray, and described back of the body arc clamping screw can be along described sliding tray horizontal sliding;
The compression end face of the support end face of described inner arc support cylinder, the perpendicular head of pressure of back of the body arc clamping screw is all provided with support ball;
On described machine tool guideway Connection Block, be positioned at described brazing area, near the outside of blade root side, blade support device be installed.
The beneficial effect of turbine blade brazing deformation control method of the present invention is: it is to the forward and backward brazing deformation component analysis of comparing with blade design theoretical model of blade soldering for test, according to analysis result, to using while carrying out soldering with the product blade of blade same specification soldering special fixture to apply and the mistake distortional stress of brazing deformation opposite direction the territory, Main Deformation of the corresponding pilot blade of product blade with test, thereby reach the object of controlling blade brazing deformation, it can effectively control blade brazing deformation; During the soldering of product blade, the clamping of product blade is simple, clamping and positioning is reliable, and the operation that product blade brazing area was loaded to distortional stress is also simple and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation that adopts soldering special fixture clamping turbine blade of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to structure for amplifying schematic diagram;
Fig. 3 is pilot blade brazing deformation monitoring gear schematic diagram in embodiment;
Fig. 4 is pilot blade brazing deformation selecting test point schematic diagram in embodiment.
The specific embodiment
Embodiment:
Below in conjunction with accompanying drawing, specifically describe the method for turbine blade brazing deformation of the present invention control:
First according to common process, in test, use the leading edge soldering stellite alloy film of blade, then adopting three-dimensional checkout equipment to detect test respectively uses blade before soldering, brazing deformation amount and deformation tendency that soldering rear blade brazing area is compared with blade design theoretical model, after pilot blade soldering, deformation test the results are shown in Table 1, the 11st point～15 point deformation value of interim every grade is maximum and be negative (from inner arc toward carrying on the back), distortion that 1 point～5 are located is relatively little and be mainly just (from back of the body arc toward interior), and 9, 11, 12 gears, deflection is negative value, it is back edge by the support or oppose torsional deflection of arc of inner arc that analysis obtains the territory, Main Deformation of pilot blade soldering and deformation direction, and the entirety in cross section, place, leaf top is by the inner arc arc canting of supporting or opposing, then according to the pilot blade brazing deformation analysis result obtaining, to with test while carrying out stellite alloy film soldering with the product blade of blade same specification, use soldering special fixture to clamp product blade, simultaneously brazing jig applies and the distortional stress of crossing of brazing deformation opposite direction the territory, Main Deformation of the corresponding pilot blade of product blade, thereby reach the object of controlling blade brazing deformation.At soldering special fixture, the territory, Main Deformation of the corresponding pilot blade of product blade is applied with the concrete operations of crossing distortional stress of brazing deformation opposite direction and be, during product blade clamping, the inner arc bracing or strutting arrangement of soldering special fixture first with the interior arc shaped surface of product blade between reserved 0.5mm～4mm gap, then the back of the body arc hold down gag of soldering special fixture more lower compression product blade convex profile until the interior arc shaped surface of product blade and the inner arc bracing or strutting arrangement of soldering special fixture be adjacent to.Adopt after said method, the brazing deformation situation of testing product blade is in Table 2, the about 0.65mm of the maximum deformation quantity of whole blade as can be seen from Table 2, and the maximum deformation quantity 2.5 of comparing table 1 declines approximately 74%, successful.
Soldering special fixture, it comprises machine tool guideway Connection Block 1 and some groups of chuck mechanisms 2, in the present embodiment, chuck mechanism 2 is provided with three groups, see Fig. 1 and Fig. 2, three groups of chuck mechanisms 2 are installed on machine tool guideway Connection Block 1, and three groups of chuck mechanisms 2 are evenly arranged along the length direction of the brazing area of blade stellite alloy film, distance between two adjacent groups chuck mechanism 2 is 10cm～20cm, machine tool guideway Connection Block 1 is installed on also can be along machine tool guideway 3 translations on machine tool guideway 3, between machine tool guideway Connection Block 1 and machine tool guideway 3, by machine tool guideway lock-screw 4, lock, in Fig. 1 and Fig. 2,19 is stellite alloy film brazing area.
Chuck mechanism comprises inner arc bracing or strutting arrangement and back of the body arc hold down gag, inner arc bracing or strutting arrangement is installed on machine tool guideway Connection Block 1, back of the body arc hold down gag is installed on machine tool guideway Connection Block 1 by supporting adn fixing device 5, and back of the body arc hold down gag is positioned at inner arc bracing or strutting arrangement top, in the region of blade 6 to be welded between inner arc bracing or strutting arrangement, back of the body arc hold down gag, and coordinate and compress by inner arc bracing or strutting arrangement, back of the body arc hold down gag, give blade 6 to be welded to cross distortional stress simultaneously; Supporting adn fixing device 5 can regulate according to the thickness of different leaves.
Inner arc bracing or strutting arrangement comprises inner arc support cylinder 7 and regulates bearing 8, regulates bearing 8 to be installed on machine tool guideway Connection Block 1, and inner arc support cylinder 7 can be installed on up or down and regulate in bearing 8; Regulate bearing 8 to have vertical holding tank 9, inner arc support cylinder 7 is installed in holding tank 9 and by lock-screw 10 locking positionings that regulate on bearing 8; Regulate bearing 8 to have tapped through hole radially, tapped through hole and holding tank 9 UNICOMs, lock-screw 10 front ends hold out against the inner arc support cylinder 7 in holding tank 9 through after tapped through hole, and lock-screw 10 rear ends are provided with regulating handle 11;
Back of the body arc hold down gag comprises back of the body arc compact heap 12 and back of the body arc clamping screw 13, back of the body arc compact heap 12 is installed on supporting adn fixing device 5, supporting adn fixing device 5 is installed on lathe Connection Block 1, vertical at right angle setting is on back of the body arc compact heap 12 movably for back of the body arc clamping screw 13, and the lower end of back of the body arc clamping screw 13 is provided with hold-down head 14; Back of the body arc compact heap 12 has the sliding tray 15 of level, back of the body arc clamping screw 13 vertical through after sliding tray 15 by locking nut 16 positioning and lockings on back of the body arc compact heap 12, back of the body arc clamping screw 13 can be along sliding tray 15 horizontal slidings; The compression end face of the support end face of inner arc support cylinder 7, the hold-down head 14 of back of the body arc clamping screw 13 is all provided with and supports ball 16;
On the machine tool guideway Connection Block 1 of brazing area near blade root 17 1 sides, blade support device 18 is installed.
During clamping, inner arc support cylinder is first installed, and regulate the height of support cylinder, make the gap of ball apart from the about 0.5-4mm of soldering blade concavity profile, and then installation blade, back of the body arc hold down gag is installed again, is tightened locking nut 16 and make blade concavity profile be close to the ball of lower support cylinder fixture.
Table 1:
Table 2:
Claims (10)
1. a turbine blade brazing deformation control method, it is characterized in that: the first leading edge soldering stellite alloy film at test blade according to common process, then detect described test blade before soldering, brazing deformation amount and deformation tendency that soldering rear blade brazing area is compared with blade design theoretical model, analyze described brazing deformation amount and deformation tendency, obtain territory, Main Deformation and the brazing deformation direction of pilot blade soldering, according to the territory, Main Deformation of the pilot blade soldering obtaining and brazing deformation direction, when carrying out stellite alloy film soldering with described test with the product blade of blade same specification, use soldering special fixture to apply and the distortional stress of crossing of brazing deformation opposite direction the territory, Main Deformation of the corresponding described pilot blade of described product blade, thereby reach the object of controlling blade brazing deformation.
2. a kind of turbine blade brazing deformation control method according to claim 1, it is characterized in that: described soldering special fixture applies with the concrete operations of crossing distortional stress of brazing deformation opposite direction the territory, Main Deformation of the corresponding described pilot blade of described product blade and is, during described product blade clamping, reserved 0.5mm～4mm gap between the inner arc bracing or strutting arrangement elder generation of described soldering special fixture and the interior arc shaped surface of described product blade, then the back of the body arc hold down gag of the described soldering special fixture lower convex profile that compresses described product blade again, until the interior arc shaped surface of described product blade and the inner arc bracing or strutting arrangement of described soldering special fixture are adjacent to.
3. a kind of turbine blade brazing deformation control method according to claim 1, it is characterized in that: the territory, Main Deformation of described pilot blade soldering and deformation direction comprise back edge torsional deflection to arc by inner arc, and the entirety in cross section, place, leaf top is by the inner arc arc canting of supporting or opposing.
4. soldering special fixture claimed in claim 2, it is characterized in that: it comprises machine tool guideway Connection Block and some groups of chuck mechanisms, described some groups of chuck mechanisms are installed on described machine tool guideway Connection Block, and described some groups of chuck mechanisms are evenly arranged along the length direction of the brazing area of blade stellite alloy film, distance described in two adjacent groups between chuck mechanism is 10cm～20cm, described machine tool guideway Connection Block is installed on also can be along described machine tool guideway translation on machine tool guideway, between described machine tool guideway Connection Block and described machine tool guideway, by machine tool guideway lock-screw, lock.
5. soldering special fixture according to claim 4, it is characterized in that: described chuck mechanism comprises inner arc bracing or strutting arrangement and back of the body arc hold down gag, described inner arc bracing or strutting arrangement is installed on described machine tool guideway Connection Block, described back of the body arc hold down gag is installed on described machine tool guideway Connection Block by supporting adn fixing device, and described back of the body arc hold down gag is positioned at described inner arc bracing or strutting arrangement top, blade to be welded is positioned at described inner arc bracing or strutting arrangement, in region between back of the body arc hold down gag, and by described inner arc bracing or strutting arrangement, back of the body arc hold down gag coordinates compression, give described blade to be welded to cross distortional stress simultaneously.
6. soldering special fixture according to claim 5, it is characterized in that: described inner arc bracing or strutting arrangement comprises inner arc support cylinder and regulates bearing, described adjusting bearing is installed on described machine tool guideway Connection Block, and described inner arc support cylinder can be installed in described adjusting bearing up or down.
7. soldering special fixture according to claim 6, is characterized in that: described adjusting bearing has vertical holding tank, and described inner arc support cylinder is installed in described holding tank and by the lock-screw locking positioning on described adjusting bearing; Described adjusting bearing has tapped through hole radially, described tapped through hole and described holding tank UNICOM, described lock-screw front end holds out against the described inner arc support cylinder in described holding tank through after described tapped through hole, and described lock-screw rear end is provided with regulating handle.
8. soldering special fixture according to claim 7, it is characterized in that: described back of the body arc hold down gag comprises back of the body arc compact heap and back of the body arc clamping screw, described back of the body arc compact heap is installed on described supporting adn fixing device, described supporting adn fixing device is installed on described lathe Connection Block, vertical at right angle setting is on described back of the body arc compact heap movably for described back of the body arc clamping screw, and the lower end of described back of the body arc clamping screw is provided with hold-down head; Described back of the body arc compact heap has the sliding tray of level, and described back of the body arc clamping screw is vertically through passing through locking nut positioning and locking on described back of the body arc compact heap after described sliding tray, and described back of the body arc clamping screw can be along described sliding tray horizontal sliding.
9. soldering special fixture according to claim 8, is characterized in that: the compression end face of the support end face of described inner arc support cylinder, the perpendicular head of pressure of back of the body arc clamping screw is all provided with support ball.
10. soldering special fixture according to claim 9, is characterized in that: on described machine tool guideway Connection Block, be positioned at described brazing area, near the outside of blade root side, blade support device be installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310680231.7A CN103752983B (en) | 2013-12-15 | 2013-12-15 | Hard-soldering deformation control method for turbine blade and special fixture for hard-soldering |
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| CN201310680231.7A CN103752983B (en) | 2013-12-15 | 2013-12-15 | Hard-soldering deformation control method for turbine blade and special fixture for hard-soldering |
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| CN103752983B CN103752983B (en) | 2017-02-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057169A (en) * | 2014-06-13 | 2014-09-24 | 南京赛达机械制造有限公司 | Special fixture for processing turbine blade |
| CN104551494A (en) * | 2014-11-18 | 2015-04-29 | 哈尔滨汽轮机厂有限责任公司 | Clamp for welding Stellite alloy sheet of steam turbine blade |
| CN105643478A (en) * | 2015-12-27 | 2016-06-08 | 无锡透平叶片有限公司 | Suspension type shot blasting clamp device used for blade root shot blasting of turbine blades |
| CN106984880A (en) * | 2017-03-02 | 2017-07-28 | 哈尔滨汽轮机厂有限责任公司 | A kind of stellite linear leaf automatic brazing system and method |
| CN107649800A (en) * | 2017-09-27 | 2018-02-02 | 中车株洲电机有限公司 | Overlap joint gap control device and obtain the method that optimal loading force carries out soldering |
| CN108098100A (en) * | 2017-12-07 | 2018-06-01 | 北京动力机械研究所 | A kind of Control Thermal Deformation device of multiple degrees of freedom space structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057169A (en) * | 2014-06-13 | 2014-09-24 | 南京赛达机械制造有限公司 | Special fixture for processing turbine blade |
| CN104551494A (en) * | 2014-11-18 | 2015-04-29 | 哈尔滨汽轮机厂有限责任公司 | Clamp for welding Stellite alloy sheet of steam turbine blade |
| CN105643478A (en) * | 2015-12-27 | 2016-06-08 | 无锡透平叶片有限公司 | Suspension type shot blasting clamp device used for blade root shot blasting of turbine blades |
| CN106984880A (en) * | 2017-03-02 | 2017-07-28 | 哈尔滨汽轮机厂有限责任公司 | A kind of stellite linear leaf automatic brazing system and method |
| CN106984880B (en) * | 2017-03-02 | 2019-03-12 | 哈尔滨汽轮机厂有限责任公司 | A kind of stellite linear leaf automatic brazing system and method |
| CN107649800A (en) * | 2017-09-27 | 2018-02-02 | 中车株洲电机有限公司 | Overlap joint gap control device and obtain the method that optimal loading force carries out soldering |
| CN108098100A (en) * | 2017-12-07 | 2018-06-01 | 北京动力机械研究所 | A kind of Control Thermal Deformation device of multiple degrees of freedom space structure |
| CN108098100B (en) * | 2017-12-07 | 2020-11-20 | 北京动力机械研究所 | Thermal deformation control device of multi-degree-of-freedom space structure |
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| CN103752983B (en) | 2017-02-15 |
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