CN102935582A - Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine - Google Patents
Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine Download PDFInfo
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- CN102935582A CN102935582A CN2012104645459A CN201210464545A CN102935582A CN 102935582 A CN102935582 A CN 102935582A CN 2012104645459 A CN2012104645459 A CN 2012104645459A CN 201210464545 A CN201210464545 A CN 201210464545A CN 102935582 A CN102935582 A CN 102935582A
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Abstract
The invention relates to a processing method of a tiepiece boss and a bone type shroud ring structure of a turbine and belongs to the technical field of turbine large blade processing. The processing method resolves the problem that processing quality of turbine large blades with length over 1000mm is poor at present. The processing method comprises the following steps: adopting numerical control scanning on milling a blade steam passage molded line of a rough forged blank blade; adopting a milling processing technology to process a fir tree blade rootflute profile of the blade; processing the tiepiece boss in the middle of a blade profile; processing a blade shroud bone-shaped shroud ring type line, and obtaining a processed large blade; performing welding processing of stellite alloy grooves on the processed large blade; and performing shot blasting strengthening on the obtained large blade processed by the step five, and obtaining the large blade with the tiepiece boss and the bone type shroud ring structure. The processing method is suitable for processing turbine large blades with length over 1000mm.
Description
Technical field
The present invention relates to the processing method of a kind of steam turbine band lacing wire boss and the large blade of bone-type enclosing strip structure, belong to the large blade processing technical field of steam turbine.
Background technology
At present, in the large blade processing of steam turbine, above the large blade more than the 1000mm, existing three-axis numerical control processing can not guarantee the crudy of its lacing wire boss and bone-type enclosing strip for length.
Summary of the invention
The present invention is the poor problem of crudy that at present length is surpassed the large blade of steam turbine more than the 1000mm in order to solve, and the processing method of a kind of steam turbine band lacing wire boss and the large blade of bone-type enclosing strip structure is provided.
The processing method of steam turbine band lacing wire boss of the present invention and the large blade of bone-type enclosing strip structure, it may further comprise the steps:
Step 1: adopt digital control scanning to mill blade steam passage molded line to the rough forge blanking blade;
Step 2: the fir tree blade root flute profile that adopts Milling Process processes blade;
Step 3: the lacing wire boss in the middle of the processing blade profile;
Step 4: processing integral shroud bone shape shroud shape line, the large blade after obtaining to process;
Step 5: the welding processing of the large blade after the processing being carried out the stellite groove;
Step 6: the large blade that obtains after the processing in the step 5 is carried out shot peening strengthening, obtain band lacing wire boss and the large blade of bone-type enclosing strip structure.
The process that employing digital control scanning in the step 1 mills blade steam passage molded line is: carry out first steam passage and rough mill, carry out the steam passage finish-milling again.
The process of the lacing wire boss in the step 3 in the middle of the processing blade profile is: carry out first the lacing wire boss and rough mill, carry out lacing wire boss finish-milling again.
The process of processing integral shroud bone shape shroud shape line is in the step 4: carry out first shroud and rough mill, carry out the shroud finish-milling again.
Advantage of the present invention is: among the present invention, the blade steam passage is not only long but also thin, therefore adopt four axle lathes to clamp take the blade root of large blade, leaf top centre hole as origin reference location, clamped one time is finished the processing of blade steam passage, lacing wire boss, bone-type enclosing strip and stellite groove.
Through being that the blade of 1200mm tries processing, detection, trial assembly and joins to length, 1200 blade processing precision, fitted position all reach designing requirement.Processing method is reasonable.The present invention has established solid foundation for the processing that will carry from now on lacing wire boss, the large blade of bone shape shroud form.
Description of drawings
Fig. 1 is the flow chart of processing method of the present invention.
The specific embodiment
The specific embodiment one: below in conjunction with Fig. 1 present embodiment is described, the processing method of the described steam turbine band of present embodiment lacing wire boss and the large blade of bone-type enclosing strip structure, it may further comprise the steps:
Step 1: adopt digital control scanning to mill blade steam passage molded line to the rough forge blanking blade;
Step 2: the fir tree blade root flute profile that adopts Milling Process processes blade;
Step 3: the lacing wire boss in the middle of the processing blade profile;
Step 4: processing integral shroud bone shape shroud shape line, the large blade after obtaining to process;
Step 5: the welding processing of the large blade after the processing being carried out the stellite groove;
Step 6: the large blade that obtains after the processing in the step 5 is carried out shot peening strengthening, obtain band lacing wire boss and the large blade of bone-type enclosing strip structure.
Present embodiment is processed at four axle machine tools, finishes the processing of described large blade in the situation that does not increase equipment investment.
Blade take length as 1200mm is example, its blade root is adopted fir shape straight-tooth structure, blade profile is free forming bending structure, the back side carries the lacing wire boss in the middle of the blade profile, back of the body convex concave line skeletonization shape in the leaf top girth band, at steam passage top admission side weld 400mm stellite alloy film, the gap assembling is adopted in anti-water erosion.The steam passage total length is carried out shot peening, can improve blade surface intensity, improves the performance of blade antifatigue.
Welding processing in the step 5 adopts overlength stellite alloy film high-frequency induction welding technique method.
The specific embodiment two: present embodiment is for to the further specifying of embodiment one, and the process that the employing digital control scanning in the described step 1 of present embodiment mills blade steam passage molded line is: carry out first steam passage and rough mill, carry out the steam passage finish-milling again.
The specific embodiment three: present embodiment is for to the further specifying of embodiment one or two, and the process of the lacing wire boss in the described step 3 of present embodiment in the middle of the processing blade profile is: carry out first the lacing wire boss and rough mill, carry out lacing wire boss finish-milling again.
The specific embodiment four: present embodiment is for to embodiment one, two or three further specify, and the process of processing integral shroud bone shape shroud shape line is in the described step 4 of present embodiment: carry out first shroud and rough mill, carry out the shroud finish-milling again.
Among the present invention, more than 30 the small numerical control procedure such as whole NC Machining Process comprises that steam passage is rough milled, steam passage finish-milling, lacing wire boss are rough milled, lacing wire boss finish-milling, shroud are rough milled, shroud finish-milling, Si Taili alloy groove are rough milled, the multiple cutters such as employing dish milling cutter, cylindrical bar milling cutter, rose cutter, bulb tapering cutter replace milling, adopt respectively the multiple cutting forms such as minute half milling and accumulation milling to finish the processing of blade shape.
Claims (4)
1. the processing method of a steam turbine band lacing wire boss and the large blade of bone-type enclosing strip structure, it is characterized in that: it may further comprise the steps:
Step 1: adopt digital control scanning to mill blade steam passage molded line to the rough forge blanking blade;
Step 2: the fir tree blade root flute profile that adopts Milling Process processes blade;
Step 3: the lacing wire boss in the middle of the processing blade profile;
Step 4: processing integral shroud bone shape shroud shape line, the large blade after obtaining to process;
Step 5: the welding processing of the large blade after the processing being carried out the stellite groove;
Step 6: the large blade that obtains after the processing in the step 5 is carried out shot peening strengthening, obtain band lacing wire boss and the large blade of bone-type enclosing strip structure.
2. the processing method of steam turbine band lacing wire boss according to claim 1 and the large blade of bone-type enclosing strip structure, it is characterized in that: the process that the employing digital control scanning in the step 1 mills blade steam passage molded line is: carry out first steam passage and rough mill, carry out the steam passage finish-milling again.
3. the processing method of steam turbine band lacing wire boss according to claim 1 and 2 and the large blade of bone-type enclosing strip structure, it is characterized in that: the process of the lacing wire boss in the step 3 in the middle of the processing blade profile is: carry out first the lacing wire boss and rough mill, carry out lacing wire boss finish-milling again.
4. the processing method of steam turbine band lacing wire boss according to claim 3 and the large blade of bone-type enclosing strip structure is characterized in that: the process of processing integral shroud bone shape shroud shape line is in the step 4: carry out first shroud and rough mill, carry out the shroud finish-milling again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104645459A CN102935582A (en) | 2012-11-16 | 2012-11-16 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104645459A CN102935582A (en) | 2012-11-16 | 2012-11-16 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
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| CN102935582A true CN102935582A (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104645459A Pending CN102935582A (en) | 2012-11-16 | 2012-11-16 | Processing method of large blade with tiepiece boss and bone type shroud ring structure of turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109213081A (en) * | 2017-10-29 | 2019-01-15 | 中国航空制造技术研究院 | A kind of numerical-control processing method of more blades model propeller peculiar to vessel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB372139A (en) * | 1931-06-22 | 1932-05-05 | Asea Ab | Improvements in method of manufacturing turbine blades |
| CN2883679Y (en) * | 2006-03-15 | 2007-03-28 | 哈尔滨汽轮机厂有限责任公司 | Final blade of large-scale air cooling turbine |
| CN200952408Y (en) * | 2006-06-28 | 2007-09-26 | 哈尔滨汽轮机厂有限责任公司 | Special last stage blades for large air-cooled turbine |
| CN101358271A (en) * | 2008-09-26 | 2009-02-04 | 无锡透平叶片有限公司 | Blade root surface strengthening method |
| CN101363327A (en) * | 2008-09-26 | 2009-02-11 | 无锡透平叶片有限公司 | Method for processing TC11 material blade |
| CN201599065U (en) * | 2009-11-27 | 2010-10-06 | 哈尔滨汽轮机厂有限责任公司 | Low-voltage end-stage moving blade with bone-shaped shroud ring and dummy club tiepiece for supercritical steam turbine |
| CN202398875U (en) * | 2011-11-28 | 2012-08-29 | 廊坊市百斯图工具制造有限公司 | Milling cutter for machining roots of blades of steam turbine |
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2012
- 2012-11-16 CN CN2012104645459A patent/CN102935582A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB372139A (en) * | 1931-06-22 | 1932-05-05 | Asea Ab | Improvements in method of manufacturing turbine blades |
| CN2883679Y (en) * | 2006-03-15 | 2007-03-28 | 哈尔滨汽轮机厂有限责任公司 | Final blade of large-scale air cooling turbine |
| CN200952408Y (en) * | 2006-06-28 | 2007-09-26 | 哈尔滨汽轮机厂有限责任公司 | Special last stage blades for large air-cooled turbine |
| CN101358271A (en) * | 2008-09-26 | 2009-02-04 | 无锡透平叶片有限公司 | Blade root surface strengthening method |
| CN101363327A (en) * | 2008-09-26 | 2009-02-11 | 无锡透平叶片有限公司 | Method for processing TC11 material blade |
| CN201599065U (en) * | 2009-11-27 | 2010-10-06 | 哈尔滨汽轮机厂有限责任公司 | Low-voltage end-stage moving blade with bone-shaped shroud ring and dummy club tiepiece for supercritical steam turbine |
| CN202398875U (en) * | 2011-11-28 | 2012-08-29 | 廊坊市百斯图工具制造有限公司 | Milling cutter for machining roots of blades of steam turbine |
Non-Patent Citations (1)
| Title |
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| 唐清春等: "600MW汽轮机调节级动叶片制造工艺研究", 《汽轮机技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109213081A (en) * | 2017-10-29 | 2019-01-15 | 中国航空制造技术研究院 | A kind of numerical-control processing method of more blades model propeller peculiar to vessel |
| CN109213081B (en) * | 2017-10-29 | 2020-07-07 | 中国航空制造技术研究院 | Numerical control machining method of propeller model for multi-blade ship |
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Application publication date: 20130220 |