CN109341478B - Turbine blade size measuring device and measuring method - Google Patents
Turbine blade size measuring device and measuring method Download PDFInfo
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- CN109341478B CN109341478B CN201811371680.2A CN201811371680A CN109341478B CN 109341478 B CN109341478 B CN 109341478B CN 201811371680 A CN201811371680 A CN 201811371680A CN 109341478 B CN109341478 B CN 109341478B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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Abstract
The invention discloses a turbine blade size measuring device and a measuring method, wherein a turbine blade to be measured is placed in a groove of a lower positioning machine base, the turbine blade to be measured is pressed by a pressing block, then a detection meter and a counter pin are calibrated, the detection meter moves along the upper surface of the upper positioning machine base, the measured values of a blade crown and a blade flange after the turbine blade is ground can be obtained, the counter pin on the measuring device is directly used for counter-measuring, various errors generated by using a standard component for counting the meter are reduced, the detection accuracy of the characteristics generated by grinding the blade flange or the blade crown is improved, the influence on the error of the manufacturing of the surface component is avoided, the difficult problem of detecting the measured errors of the blade crown and the blade flange after the turbine blade is ground is solved, the detection period is shortened, the detection efficiency is improved, the structure is novel, the operation is convenient, and the positioning, clamping and the, the method can be widely applied to the detection of other complex parts, and has popularization value.
Description
Technical Field
The invention relates to a turbine blade size measuring device and a turbine blade size measuring method, and belongs to the field of blade detection.
Background
When the grinding size of the turbine blade tenon and the blade shroud is measured, corresponding standard parts are made to be matched with a measuring tool for use. The standard part measuring tool is firstly positioned during detection, then the surface of the machined surface is relatively measured, and due to the fact that machining errors cause that the standard part datum plane cannot be accurately attached to the positioning datum plane of the measuring tool, detection data of an inspector during detection are unstable, repeated measurement is conducted on the same size for multiple times, detection efficiency is low, and misjudgment is prone to occurring. And the size transfer accumulated error is easy to occur in the whole detection process.
The measuring tool is checked by using the standard sample piece during each measurement, the measured parts are measured one by one, and if the parts are machined at the upper limit position and the lower limit position, repeated measurement is caused due to inaccurate positioning. The detection period can not be counted accurately, and the variation is large. The detection occupies a large amount of time to do useless work, and the detection efficiency is low.
The standard part needs to be repeatedly confirmed during detection, so that detection errors caused by human factors are easy to occur. The standard component reference surface itself that selects has manufacturing error, can produce when using the standard component to the table error, because the table error is measured when measuring the part to be measured, further influences the accuracy of measuring result.
Disclosure of Invention
The invention aims to provide a turbine blade dimension measuring device and a measuring method, which are used for overcoming the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a turbine blade size measuring device comprises a lower positioning base and an upper positioning base, wherein the upper positioning base is fixed at the upper end of the lower positioning base; a pressing block is arranged on one side, opposite to the upper positioning base, of the lower positioning base, the pressing block is rotatably connected with the lower positioning base, the pressing block is fixedly pressed through a fastening bolt, the upper end face of the upper positioning base is a horizontal plane, and a counter pin mounting groove for fixedly mounting a counter pin is formed in the upper positioning base; the lower positioning machine base is provided with a groove for placing the turbine blade, and the shape of the groove is matched with that of the turbine blade to be detected.
Furthermore, the pressing block is rotatably connected with the lower positioning machine base through a rotating pin.
Furthermore, a lower flat plate is fixed at the lower end of the lower positioning machine base, the lower flat plate is fixedly connected with the lower positioning machine base through screws, a side flat plate which is fixedly connected with the lower positioning machine base and the upper positioning machine base is arranged on the side face of the lower positioning machine base, and the side flat plate is flush with the end face of the groove for placing the turbine blade on the lower positioning machine base.
Furthermore, the side flat plate is fixedly connected with the lower positioning machine base through a fastening screw, and the side flat plate is fixedly connected with the upper positioning machine base through a bolt group; the upper positioning machine base is provided with a through hole, and the bolt group is arranged in the through hole.
Furthermore, both ends are equipped with a locating piece standing groove respectively around being used for placing turbine blade's the recess on the lower location frame, are equipped with first locating piece and second locating piece in the locating piece standing groove respectively, go up the location frame and be close to the both ends that are used for placing turbine blade recess one side and be equipped with a locating piece fixed slot respectively, are equipped with in the locating piece fixed slot of going up the location frame and are used for carrying out the fixed side locating piece of side direction location to turbine blade that awaits measuring.
Further, the first positioning block is horizontally arranged in the positioning block placing groove along the front and back direction and fixed with the lower positioning machine base through bolts, and the second positioning block) is horizontally arranged in the positioning block placing groove along the left and right direction and fixed with the lower positioning machine base through bolts.
Furthermore, the lower end of the upper positioning machine base is provided with a positioning pin hole, the upper end of the lower positioning machine base is provided with a positioning pin hole corresponding to the positioning pin hole of the upper positioning machine base, the upper end of the upper positioning machine base is provided with a countersunk through hole, the upper end of the lower positioning machine base is provided with a threaded hole coaxial with the countersunk through hole, and the upper positioning machine base and the lower positioning machine base are fixedly connected through a fixing bolt.
Furthermore, a through hole is formed in the pressing block, a threaded hole is formed in the lower positioning base, and the pressing block is matched with the threaded hole in the lower positioning base through a fastening bolt in the pressing process.
Furthermore, a threaded rod is fixed on the lower positioning base, in the compressing process, the compressing block is close to the lower positioning base and is fastened with the threaded rod through nuts, a compressing plate is arranged between the nuts, and the compressing block is compressed through the compressing plate.
A turbine blade dimensional measurement method comprising the steps of: the turbine blade to be detected is placed in the groove of the lower positioning machine base, one end of the turbine blade to be detected is in end face contact with the side flat plate, then the turbine blade to be detected is positioned in three directions through the first positioning block, the second positioning block and the side positioning block respectively, the turbine blade to be detected is compressed through the compression block, then the detection table and the alignment pin are aligned, the detection table moves along the upper surface of the upper positioning machine base, and the measured value of the turbine blade grinding rear shroud and the edge plate can be obtained.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the turbine blade size measuring device, a turbine blade to be measured is placed in a groove of a lower positioning base, the turbine blade to be measured is pressed by a pressing block, then a detection table and a pair of gauge pins are calibrated, the detection table moves along the upper surface of the upper positioning base, and then a measured value of a blade shroud and a blade shroud after the turbine blade is ground can be obtained, the pair of gauge pins on the measuring device is directly used for measuring the gauge, so that various errors caused by using a standard component to measure the gauge, the detection accuracy of characteristics caused by grinding the blade shroud or the blade shroud is improved, and accurate and reliable analysis data are provided for technicians; the characteristic positioning and clamping requirements of the blade shroud and the edge plate after the turbine blade is ground are met, the error of the original measurement to the use standard component of the gauge is avoided, and the traditional positioning detection scheme of the characteristic of the blade shroud and the edge plate after the turbine blade is ground is improved. The method is not influenced by errors of manufacturing of the surface parts, so that the detection requirements of the characteristics of the blade shroud and the edge plate after the turbine blade is ground can be completely met, the detection problem of the measurement errors of the blade shroud and the edge plate after the turbine blade is ground is solved, the detection period is shortened, the detection efficiency is improved, the structure is novel, the operation is convenient, the positioning, clamping and detection reliability are high, the method can be widely applied to the detection of other complex parts, and the popularization value is high.
Further, through under the location frame lower extreme set up dull and stereotyped, dull and stereotyped and location frame pass through screw fixed connection down, the side of location frame is equipped with simultaneously with down location frame and last location frame fixed connection's side flat board down, the side flat board with on the location frame under with be used for placing turbine blade's recess terminal surface parallel and level, make turbine blade one end and the dull and stereotyped end face contact of side that awaits measuring, through first locating piece, second locating piece and side locating piece are fixed a position the three direction of turbine blade that awaits measuring respectively, realize accurate location, guarantee measuring result's accuracy.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the positioning detection of the present invention;
fig. 2 is a side view of fig. 1.
FIG. 3 is a schematic structural view of a lower positioning base;
FIG. 4 is a sectional view taken along line A and line B of FIG. 3;
FIG. 5 is a schematic view of the structure of the upper positioning base;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a schematic view of the structure of FIG. 5A;
FIG. 8 is a schematic structural view of a compact;
wherein, 1, lower positioning machine base; 2. an upper positioning base; 3. a compression block; 5. a lower flat plate; 6. a side plate; 7. a nut; 8. a rotation pin; 9. a compression plate; 11. a first positioning block; 12. a second positioning block; 13. a side positioning block; 14. a turbine blade to be tested; 15. a hold-down bolt; 16. fixing the bolt; 17. fastening a bolt; 18. fastening screws; 19. positioning pins; 21. a bolt group; 23. and (6) checking and pinning the meter.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 to 8, a turbine blade size measuring device includes a lower positioning base 1 and an upper positioning base 2, wherein the upper positioning base 2 is fixed at the upper end of the lower positioning base 1; a pressing block 3 is arranged on one side, corresponding to the upper positioning base 2, of the lower positioning base 1, the pressing block 3 is rotatably connected with the lower positioning base 1, the pressing block 3 is fixedly pressed through a pressing bolt 15, the upper end face of the upper positioning base 2 is a horizontal plane, a counter pin mounting groove for fixedly mounting a counter pin 23 is formed in the upper positioning base 2, and the counter pin 23 is used for calibrating a nuclear measurement meter; the lower positioning base 1 is provided with a groove for placing a turbine blade, the shape of the groove is matched with that of a turbine blade 14 to be measured, and the surface to be measured of the turbine blade 14 to be measured is parallel to the upper end surface of the upper positioning base 2;
the pressing block 3 is rotationally connected with the lower positioning machine base 1 through a rotating pin 8;
as shown in fig. 2, a lower flat plate 5 is fixed at the lower end of a lower positioning machine base 1, the lower flat plate 5 is fixedly connected with the lower positioning machine base 1 through a fastening bolt 17, a side flat plate 6 which is fixedly connected with the lower positioning machine base 1 and an upper positioning machine base 2 is arranged on the side surface of the lower positioning machine base 1, and the side flat plate 6 is flush with the end surface of a groove for placing a turbine blade on the lower positioning machine base 1 and is used for transversely positioning the turbine blade to be measured; as shown in fig. 1 and 7, the side plate 6 is fixedly connected with the lower positioning machine base 1 through a fastening screw 18, and the side plate 6 is fixedly connected with the upper positioning machine base 2 through a bolt group 21; the upper positioning machine base 2 is provided with a through hole, and the bolt group 21 is arranged in the through hole;
as shown in fig. 3 to 7, the front end and the rear end of the groove for placing the turbine blade on the lower positioning machine base 1 are respectively provided with a positioning block placing groove, the positioning block placing grooves are respectively provided with a first positioning block 11 and a second positioning block 12, the two ends of the upper positioning machine base 2 close to the side for placing the groove for placing the turbine blade are respectively provided with a positioning block fixing groove, and the positioning block fixing groove of the upper positioning machine base 2 is internally provided with a side positioning block 13; the side positioning block 13 is used for laterally positioning and fixing the turbine blade to be measured;
the first positioning block 11 is horizontally arranged in the positioning block placing groove along the front and back direction and fixed with the lower positioning machine base 1 through a bolt, and the second positioning block 12 is horizontally arranged in the positioning block placing groove along the left and right direction and fixed with the lower positioning machine base 1 through a bolt;
the lower end of the upper positioning machine base 2 is provided with a positioning pin hole, the upper end of the lower positioning machine base 1 is provided with a positioning pin hole corresponding to the positioning pin hole of the upper positioning machine base 2, and the lower positioning machine base 1 and the upper positioning machine base 2 are fixed by a fixing bolt 16 after being positioned by a positioning pin 19; the upper end of the upper positioning machine base 2 is provided with a countersunk through hole, the upper end of the lower positioning machine base 1 is provided with a threaded hole coaxial with the countersunk through hole, and the upper positioning machine base 2 is fixedly connected with the lower positioning machine base 1 by using a fixing bolt 16;
the pressing block 3 is provided with a through hole, the lower positioning machine base 1 is provided with a threaded hole, and in the pressing process, the pressing block 3 is matched with the threaded hole in the lower positioning machine base 1 through a pressing bolt 15 to press the pressing block 3;
or a threaded rod is fixed on the lower positioning base 1, in the compressing process, the compressing block 3 is close to the lower positioning base 1 and is fastened with the threaded rod by using a nut 7, a compressing plate 9 is arranged between the nuts 7, and the compressing block 3 is compressed by using the compressing plate 9; the pressing plate 9 and the nut 7 are matched and pressed, so that the device is convenient, rapid and detachable, and is suitable for turbine blades to be detected with large rotation direction;
a turbine blade dimensional measurement method comprising the steps of: the turbine blade to be detected is placed in a groove of the lower positioning base 1, one end of the turbine blade to be detected is in end face contact with a side flat plate, then the turbine blade to be detected is positioned in three directions through the first positioning block 11, the second positioning block 12 and the side positioning block 13 respectively, the turbine blade to be detected is compressed by the compression block 3, then the detection table and the alignment pin 23 are aligned, the detection table moves along the upper surface of the upper positioning base 2, and the measured value of the turbine blade grinding rear shroud and the edge plate can be obtained.
The invention directly uses the meter-aligning and pin-aligning measurement on the measuring device, reduces various errors generated by using a standard component to align the meter, improves the detection accuracy of the characteristics generated by grinding the turbine blade edge plate or the blade shroud, and provides accurate and reliable analysis data for technicians
The device and the method for measuring the blade shroud and the edge plate after the turbine blade is ground improve, meet the requirement of positioning and clamping the characteristics of the blade shroud and the edge plate after the turbine blade is ground, avoid the error of the original measurement to the standard part, and improve the traditional positioning and detecting scheme of the characteristics of the blade shroud and the edge plate after the turbine blade is ground. The method is not influenced by errors of manufacturing of the surface parts, so that the detection requirements of the characteristics of the blade shroud and the edge plate after the turbine blade is ground can be completely met, the detection problem of the measurement errors of the blade shroud and the edge plate after the turbine blade is ground is solved, the detection period is shortened, the detection efficiency is improved, the method is universal, the structure is novel, the operation is convenient, the positioning, clamping and detection reliability are high, the method can be widely applied to the detection of other complex parts, and the popularization value is high.
Claims (6)
1. A turbine blade size measuring device is characterized by comprising a lower positioning base (1) and an upper positioning base (2), wherein the upper positioning base (2) is fixed at the upper end of the lower positioning base (1); a pressing block (3) is arranged on one side, opposite to the upper positioning base (2), of the lower positioning base (1), the pressing block (3) is rotatably connected with the lower positioning base (1), the pressing block (3) is fixedly pressed through a pressing bolt (15), the upper end surface of the upper positioning base (2) is a horizontal plane, and a counter pin mounting groove for fixedly mounting a counter pin (23) is formed in the upper positioning base (2); a groove for placing a turbine blade is arranged on the lower positioning base (1), and the shape of the groove is matched with that of the turbine blade (14) to be detected; the pressing block (3) is rotatably connected with the lower positioning base (1) through a rotating pin (8), a lower flat plate (5) is fixed at the lower end of the lower positioning base (1), the lower flat plate (5) is fixedly connected with the lower positioning base (1) through a fastening bolt (17), a side face of the lower positioning base (1) is provided with a side flat plate (6) which is fixedly connected with the lower positioning base (1) and the upper positioning base (2) simultaneously, the side flat plate (6) is flush with the groove end face of the lower positioning base (1) for placing turbine blades, a through hole is formed in the pressing block (3), a threaded hole is formed in the lower positioning base (1), in the pressing process, the pressing block (3) is matched with the threaded hole in the lower positioning base (1) through a pressing bolt (15) to tightly press the pressing block (3).
2. The turbine blade size measuring device of claim 1, wherein the side flat plate (6) is fixedly connected with the lower positioning base (1) through a fastening screw (18), and the side flat plate (6) is fixedly connected with the upper positioning base (2) through a bolt group (21); the upper positioning machine base (2) is provided with a through hole, and the bolt group (21) is arranged in the through hole.
3. The turbine blade size measuring device according to claim 1, wherein a positioning block placing groove is respectively arranged at the front end and the rear end of the groove for placing the turbine blade on the lower positioning base (1), a first positioning block (11) and a second positioning block (12) are respectively arranged in the positioning block placing grooves, a positioning block fixing groove is respectively arranged at the two ends of the upper positioning base (2) close to the side for placing the groove of the turbine blade, and a side positioning block (13) for laterally positioning and fixing the turbine blade to be measured is arranged in the positioning block fixing groove of the upper positioning base (2).
4. The turbine blade dimension measuring device according to claim 3, wherein the first positioning block (11) is horizontally disposed in the positioning block placement groove along the front-rear direction and fixed to the lower positioning base (1) by a bolt, and the second positioning block (12) is horizontally disposed in the positioning block placement groove along the left-right direction and fixed to the lower positioning base (1) by a bolt.
5. The turbine blade size measuring device of claim 1, wherein the lower end of the upper positioning base (2) is provided with a positioning pin hole, the upper end of the lower positioning base (1) is provided with a positioning pin hole corresponding to the positioning pin hole of the upper positioning base (2), the upper end of the upper positioning base (2) is provided with a countersunk through hole, the upper end of the lower positioning base (1) is provided with a threaded hole coaxial with the countersunk through hole, and the upper positioning base (2) and the lower positioning base (1) are fixedly connected through a fixing bolt (16).
6. A turbine blade dimension measuring method based on the turbine blade dimension measuring apparatus according to claim 1, characterized by comprising the steps of: placing the turbine blade that awaits measuring in the recess of lower location frame (1), make turbine blade one end that awaits measuring and the dull and stereotyped end face contact of side, then through first locating piece (11), second locating piece (12) and side locating piece (13) are respectively to the three orientation location back of turbine blade that awaits measuring, utilize compact heap (3) to compress tightly the turbine blade that awaits measuring, then will detect the table and go on to the table and right round pin (23) to the calibration, will detect the table and follow last location frame (2) upper surface removal, can obtain turbine blade grinding rear shroud and flange board measured value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811371680.2A CN109341478B (en) | 2018-11-14 | 2018-11-14 | Turbine blade size measuring device and measuring method |
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| CN201811371680.2A CN109341478B (en) | 2018-11-14 | 2018-11-14 | Turbine blade size measuring device and measuring method |
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| CN109341478A CN109341478A (en) | 2019-02-15 |
| CN109341478B true CN109341478B (en) | 2020-10-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834455A (en) * | 2020-06-24 | 2021-12-24 | 中国航发商用航空发动机有限责任公司 | Turbine stator runout detection device |
| CN115555921B (en) * | 2022-12-07 | 2023-03-10 | 北京汉飞航空科技有限公司 | Self-adaptive adjusting device and method for turbine blade based on six-point measuring tool |
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| CN107560519A (en) * | 2017-09-28 | 2018-01-09 | 中国航发动力股份有限公司 | A kind of moving turbine blade locking plate groove scrap (bridge) size detecting device |
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| EP2764324B1 (en) * | 2011-10-06 | 2019-03-27 | Renishaw PLC | Method and apparatus for locating a feature of an object |
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| JP2012154327A (en) * | 2011-01-25 | 2012-08-16 | General Electric Co <Ge> | Turbine blade measuring device |
| CN104197799A (en) * | 2014-08-18 | 2014-12-10 | 南京赛达机械制造有限公司 | Measuring tool positioning device special for die forging blade of steam turbine |
| CN204301636U (en) * | 2014-12-17 | 2015-04-29 | 四川绵竹鑫坤机械制造有限责任公司 | A kind of blade comprehensive check tool |
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