CN109186518B - Dovetail-shaped tenon rotor blade detection clamp and detection method - Google Patents
Dovetail-shaped tenon rotor blade detection clamp and detection method Download PDFInfo
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- CN109186518B CN109186518B CN201811032234.9A CN201811032234A CN109186518B CN 109186518 B CN109186518 B CN 109186518B CN 201811032234 A CN201811032234 A CN 201811032234A CN 109186518 B CN109186518 B CN 109186518B
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- blade
- rotor blade
- dovetail
- erowa
- tenon
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/047—Accessories, e.g. for positioning, for tool-setting, for measuring probes
-
- 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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
A dovetail tenon rotor blade detection clamp and a detection method are provided, wherein the detection clamp comprises a base which can be arranged on an EROWA tray, and the EROWA tray is arranged on an EROWA chuck of an automatic processing line; the top of the base is provided with a clamping groove for mounting the tail of the dovetail tenon rotor blade, and after the dovetail tenon rotor blade is mounted in place, the superposed shaft of the dovetail tenon rotor blade is superposed with the central shafts of the EROWA tray and the EROWA chuck; the base is provided with a mandril which can move up and down along the central shaft direction of the EROWA tray, one end of the mandril can tightly push the bottom surface of the dovetail-shaped tenon rotor blade to realize fastening, the other end of the mandril is installed on an eccentric shaft, and the eccentric shaft is transversely arranged on the upper part of the base and can be locked through a positioning pin. Corresponding measuring programs are set in the automatic machining line of the precisely forged blade, and an automatic production mode of unattended operation and less human intervention can be realized through interaction.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a dovetail-shaped tenon rotor blade detection clamp and a detection method.
Background
In the traditional three-coordinate detection of the precision forging blade, an inspector manually establishes a measuring coordinate system according to the standard required by a drawing of a measuring clamp, installs the blade in the measuring clamp for detection, and dismantles the blade after the detection is finished, prints a report, and repeats the steps in sequence to finish the batch detection of the blade. With the generation of an automatic line for machining the precision-forged blades, the detection method cannot meet the requirement of an unattended and less-manual-intervention production mode, and the unattended and less-manual-intervention production mode is an automatic production mode.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a dovetail tenon rotor blade detection clamp and a detection method, which can meet the requirement of automatic detection of dovetail tenon blades in a precision forging blade automatic processing line.
In order to achieve the above object, the dovetail tenon rotor blade inspection fixture of the present invention comprises a base capable of being mounted on an EROWA pallet mounted on an EROWA chuck of an automatic processing line; the top of the base is provided with a clamping groove for mounting the tail part of the dovetail tenon rotor blade, and after the dovetail tenon rotor blade is mounted in place, the superposed shaft of the dovetail tenon rotor blade is superposed with the central shafts of the EROWA tray and the EROWA chuck; the base is provided with a mandril which can move up and down along the central shaft direction of the EROWA tray, one end of the mandril can tightly push the bottom surface of the dovetail-shaped tenon rotor blade to realize fastening, the other end of the mandril is installed on an eccentric shaft, and the eccentric shaft is transversely arranged on the upper part of the base and can be locked through a positioning pin.
The upper part of the base is transversely provided with a through hole for arranging an eccentric shaft, a thread bushing and a centering bushing which are matched with the eccentric shaft are arranged in the through hole, and the eccentric shaft is arranged in the centering bushing in a clearance fit mode.
A threaded plug for dust prevention is installed in the centering bushing, and one end of the eccentric shaft extends out of the base and is connected with the handle.
The clamping groove is a trapezoidal section groove matched with the tail of the dovetail tenon rotor blade, and one end of the clamping groove is provided with an installation positioning block.
The invention discloses a detection method of a dovetail tenon rotor blade detection clamp, which comprises the following steps:
1) installing the dovetail tenon rotor blade in place, randomly measuring a plurality of points, prejudging whether blade clamping is accurate or not, if the error exceeds a threshold value, feeding error information back to a control system by a precision forging blade automatic processing line measuring machine, stopping measurement, and re-clamping;
2) after the dovetail tenon rotor blade is correctly clamped, firstly establishing an initial coordinate system, and measuring the circle center of the initial coordinate system as the circle center of the tray in the direction of the coordinate system of the automatic processing line measuring machine for the precision forging blade; then, establishing a measuring coordinate system at the tenon part of the blade which is not covered by the clamp; finally, analyzing the characteristics of the part to be measured of the measured blade and setting a measuring program;
3) an EROWA tray provided with a measured blade is grabbed from a material library by a precision forging blade automatic processing line through a manipulator and is placed on an EROWA chuck, and a measuring program of the measured blade is called to carry out related measurement;
in the measuring process, after each blade is measured, the manipulator grabs a standard blade to carry out measurement calibration, if the measurement error is greater than a set value, the wire is stopped for inspection, and if the measurement error is within the range of the set value, the system normally operates;
4) and outputting a measurement report.
Step 2) performing curve scanning on the working surface of the blade tenon of the exposed part of the mounting positioning block to construct a plane; the symmetrical plane of the plane constructed by the working surfaces of the blade basin and the blade back tenon is the direction and the zero point of the Y axis of the coordinate system, the positioning surface of the air inlet side of the blade is the direction of the X axis of the coordinate system, the translation distance A is the zero point of the X axis of the coordinate system, and the translation distance C of the bottom surface Z of the blade tenon is the zero point of the Z axis of the coordinate system. And 1) measuring 2-3 points on the dovetail-shaped tenon rotor blade at random to prejudge whether the blade is accurately clamped or not, and if the blade is incorrectly clamped, checking the reasons, wherein the reasons comprise whether the blade corresponds to a measuring program or not, whether the blade is clamped in place or not and whether the blade clamping direction is correct or not.
And 3) in the measuring process, after each 50 blades are measured, the manipulator grabs the standard blade for measurement and calibration.
Compared with the prior art, the dovetail tenon rotor blade detection clamp provided by the invention is provided with the base which can be matched with the EROWA tray, the automatic detection of the dovetail tenon blade is realized by adopting a WROWA ITS system automatic processing line, the top of the base is provided with a clamping groove for mounting the tail of the dovetail tenon rotor blade in the detection process, the superposed shaft of the dovetail tenon rotor blade is superposed with the central shafts of the EROWA tray and the EROWA chuck after being mounted in place, the bottom surface of the dovetail tenon rotor blade is tightly pressed by the ejector rod mounted on the eccentric shaft to realize fastening, a corresponding measuring program is arranged in the precision forging blade automatic processing line, and an automatic production mode of unattended operation and less human intervention can be realized through interaction.
Compared with the prior art, the detection method of the dovetail tenon rotor blade detection clamp comprises the steps of firstly randomly measuring a plurality of points in an automatic detection process to judge whether blade clamping is accurate or not, and establishing a related coordinate system and setting a measurement program after the blade clamping is accurate. In the measuring process, after each blade is measured, the manipulator grabs a standard blade for measurement and calibration, if the measurement error is greater than a set value, the manipulator stops the wire for inspection, and if the measurement error is within the range of the set value, the system normally operates, so that the accuracy of the automatic detection process is ensured, interference factors appearing in the detection process are automatically eliminated, and the operation stability is reliable.
Drawings
FIG. 1 is an overall view of the assembly of the inspection fixture of the present invention;
FIG. 2 is an assembled top view of the inspection fixture of the present invention;
FIG. 3 is an assembled A-A cross-sectional view of the inspection fixture of the present invention;
FIG. 4 is an assembled B-B cross-sectional view of the inspection fixture of the present invention;
FIG. 5 is an overall schematic view of the base of the present invention;
FIG. 6 is a top view of the base of the present invention;
FIG. 7 is a cross-sectional view A-A of the base of the present invention;
FIG. 8 is a cross-sectional view taken along line B-B of the base of the present invention;
FIG. 9 is a schematic view of the structure of the centering sleeve of the present invention;
FIG. 10 is a schematic view of the construction of the threaded plug of the present invention;
FIG. 11 is a schematic view showing the construction of the eccentric shaft of the present invention;
FIG. 12 is a schematic view of the construction of the carrier rod of the present invention;
FIG. 13 is a structural cross-sectional view of the threaded bushing of the present invention;
FIG. 14 is a schematic view of the handle of the present invention;
FIG. 15 is a schematic view of the tenon structure of the blade under test: (a) a front view; (b) and (6) a right view.
In the drawings: 1-a base; 2-centering the bushing; 3-a threaded plug; 4-an eccentric shaft; 5-a top rod; 6-a threaded bushing; 7-a handle; 8-a screw; 9-a positioning pin; a. the side positioning surface of the air inlet of the blade; b. a blade exhaust side positioning surface; c. a leaf back side positioning surface; d. leaf pot side positioning surface; e. the bottom surface of the blade tenon.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 4, the blade detection clamp of the present invention includes a base 1, a centering bushing 2, a threaded plug 3, an eccentric shaft 4, a push rod 5, a threaded bushing 6, a handle 7, a screw 8, and a positioning pin 9. The base 1 is fixed on an EROWA tray, then the tray with the detection clamp is installed on an EROWA chuck, and the superposition axis of the detected blade is ensured to be superposed with the central axes of the EROWA tray and the EROWA chuck. The EROWA tray and the EROWA chuck are compressed pneumatically, and the EROWA tray and the detection clamp are fixed by screws. Referring to fig. 5-8, the centering bush 2 of the present invention is coupled with the base 1 by a screw 8; the eccentric shaft 4 drives the mandril 5 to move up and down through the handle 7, so that the positioning surface of the blade is tightly attached to the M, N surface and the K surface of the base 1. The threaded bushing 6 is arranged in the base 1 and fixed by a screw 8, the threaded plug 3 is screwed into the base 1 and fixed by the screw 8, the threaded plug 3 is screwed into the centering bushing 2 for dust prevention, and the eccentric shaft 4 is arranged in the centering bushing 2 and the base 1 in a clearance fit manner; the mandril 5 is arranged in the base 1 in a clearance fit mode, the eccentric shaft 4 is arranged in the threaded bushing 6 and is integrated with the base 1 through the positioning pin 9. Referring to fig. 15(a) and 15(B), the distance B from the K surface of the base 1 to the center of the EROWA chuck is consistent with the distance B from the exhaust side positioning surface B of the blade to the blade stacking axis, and can define the clamping position of the blade in the direction of the exhaust side and the intake side. The distance D from the surface M of the base to the eccentric axis is consistent with the distance C from the surface N of the base to the eccentric axis, the error is not more than 0.005mm, and the surface M, N of the base is used for limiting the clamping positions of the blade basin side positioning surface D and the blade back side positioning surface C.
Referring to fig. 9-14, the detection method of the dovetail tenon rotor blade detection fixture of the invention comprises the following steps:
1) installing a blade: and the blade to be measured is manually installed in a measuring clamp with a tray outside the automatic processing line, so that the tenon end face of the blade to be measured is attached to the installation positioning block of the detecting clamp without a gap, and the blade is fixed in the detecting clamp. And putting the fixture with the blade belt tray into a material warehouse of an automatic processing line.
2) And (3) programming a measuring program:
2.1) preparation before measurement; delaying for 5 seconds so as to wait for the robot to mount the tray with the blades and the measuring clamp in the chuck, and closing the air supply so as to fix the EROWA chuck and the EROWA tray;
2.2) prejudging;
and measuring 2-3 points on the blade, judging whether the blade is accurately clamped, and if the clamping is wrong (the blade does not correspond to the measuring program, the blade is not clamped in place, and the blade is clamped in an unequal direction), feeding error information back to the control system by the measuring machine, and stopping measuring.
2.3) establishing an initial coordinate system;
the center of a circle of the initial measurement coordinate system is the center of a circle of the tray, and the direction of the center of the circle is the direction of the coordinate system of the measuring machine.
2.4) establishing a measurement coordinate system;
and establishing a measuring coordinate system at the tenon part of the blade, which is not covered by the clamp, according to the requirements of a drawing.
And (4) carrying out curve scanning on the working surface of the blade tenon of the exposed part of the positioning block of the measuring tool to construct a plane. The symmetrical plane of the plane constructed by the working surfaces of the blade basin and the blade back tenon is the direction and the zero point of the Y axis of the coordinate system, the positioning surface of the air inlet side of the blade is the direction of the X axis of the coordinate system, the translation distance A is the zero point of the X axis of the coordinate system, and the translation distance C of the bottom surface Z of the blade tenon is the zero point of the Z axis of the coordinate system.
And 2.5) analyzing the measured characteristics and the algorithms of the characteristics required by the measured blade according to the requirements of the design drawing, and setting in measurement software.
3) The measurement process comprises the following steps: according to the automatic line control system, the manipulator grabs the tray with the measured blade from the material warehouse, puts the tray into a chuck of the measuring machine, and calls a measuring program of the measured blade to measure.
4) And (3) calibrating the measurement process: in order to ensure the measurement accuracy, after measuring 50 blades (which can be adjusted according to actual conditions), the mechanical arm grabs a standard blade to carry out measurement calibration, if the measurement error is greater than a set value, the wire is stopped for checking, and if the measurement error is within the range of the set value, the system operates normally.
5) And (4) outputting a report: the measurement report format is selected and the measurement report is printed according to the customer's requirements.
Claims (8)
1. The utility model provides a dovetail tenon rotor blade detects anchor clamps which characterized in that: the automatic processing machine comprises a base (1) capable of being installed on an EROWA tray, wherein the EROWA tray is installed on an EROWA chuck of an automatic processing line;
the top of the base (1) is provided with a clamping groove for mounting the tail of the dovetail tenon rotor blade, and after the dovetail tenon rotor blade is mounted in place, the superposed shaft of the dovetail tenon rotor blade is superposed with the central shafts of the EROWA tray and the EROWA chuck; the base (1) is provided with a hole along the central shaft direction of the EROWA tray and is provided with a push rod (5) capable of moving up and down, one end of the push rod (5) can push against the bottom surface of a dovetail tenon rotor blade to realize fastening, the other end of the push rod is arranged on an eccentric shaft (4), and the eccentric shaft (4) is transversely arranged on the upper part of the base (1) and can be locked through a positioning pin (9); the upper part of the base (1) is transversely provided with a through hole for arranging the eccentric shaft (4), a threaded bushing (6) and a centering bushing (2) which are matched with the eccentric shaft (4) are arranged in the through hole, and the eccentric shaft (4) is arranged in the centering bushing (2) in a clearance fit manner; the clamping groove is a trapezoidal section groove which can be matched with the tail part of the dovetail tenon rotor blade; the distance B from the K surface of the base (1) to the center of the EROWA chuck is consistent with the distance B from the exhaust side positioning surface B of the blade to the blade superposed shaft, the clamping position of the blade in the direction of the exhaust side can be limited, the distance D from the M surface of the base (1) to the eccentric axis is consistent with the distance C from the N surface of the base (1) to the eccentric axis, and the M, N surfaces of the base (1) are used for limiting the clamping positions of the blade basin side positioning surface D and the blade back side positioning surface C of the blade.
2. The dovetail rotor blade inspection fixture of claim 1, wherein: a threaded plug (3) for dust prevention is installed in the centering bushing (2), and one end of the eccentric shaft (4) extends out of the base (1) and is connected with a handle (7).
3. The dovetail rotor blade inspection fixture of claim 1, wherein: and one end of the clamping groove is provided with an installation positioning block.
4. An inspection method using the dovetail rotor blade inspection jig of any one of claims 1-3, comprising the steps of:
1) installing the dovetail tenon rotor blade in place, randomly measuring a plurality of points, prejudging whether blade clamping is accurate or not, if the error exceeds a threshold value, feeding error information back to a control system by a precision forging blade automatic processing line measuring machine, stopping measurement, and re-clamping;
2) after the dovetail tenon rotor blade is correctly clamped, firstly establishing an initial coordinate system, and measuring the circle center of the initial coordinate system as the circle center of the tray in the direction of the coordinate system of the automatic processing line measuring machine for the precision forging blade; then, establishing a measuring coordinate system at the tenon part of the blade which is not covered by the clamp; finally, analyzing the characteristics of the part to be measured of the measured blade and setting a measuring program;
3) an EROWA tray provided with a measured blade is grabbed from a material library by a precision forging blade automatic processing line through a manipulator and is placed on an EROWA chuck, and a measuring program of the measured blade is called to carry out related measurement;
in the measuring process, after each blade is measured, the manipulator grabs a standard blade to carry out measurement calibration, if the measurement error is greater than a set value, the wire is stopped for inspection, and if the measurement error is within the range of the set value, the system normally operates;
4) and outputting a measurement report.
5. The inspection method of a dovetail rotor blade inspection fixture as claimed in claim 4, wherein: step 2) performing curve scanning on the blade tenon working surface of the exposed part of the mounting positioning block to construct a plane; the symmetrical plane of the plane constructed by the working surfaces of the blade basin and the blade back tenon is the direction and the zero point of the Y axis of the coordinate system, the positioning surface of the air inlet side of the blade is the direction of the X axis of the coordinate system, the translation distance A is the zero point of the X axis of the coordinate system, and the translation distance C of the bottom surface Z of the blade tenon is the zero point of the Z axis of the coordinate system.
6. The inspection method of a dovetail rotor blade inspection fixture as claimed in claim 4, wherein: 2-3 points are measured on the dovetail tenon rotor blade at random to prejudge whether the blade clamping is accurate or not.
7. The inspection method of a dovetail rotor blade inspection fixture as claimed in claim 6, wherein: when whether blade clamping is accurate or not is judged in advance, if the blade clamping is wrong, reasons are checked, and the reasons comprise whether the blade corresponds to a measuring program or not, whether the blade clamping is in place or not and whether the blade clamping direction is correct or not.
8. The inspection method of a dovetail rotor blade inspection fixture as claimed in claim 4, wherein: and 3) in the measuring process, after each 50 blades are measured, the manipulator grabs the standard blade for measurement and calibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032234.9A CN109186518B (en) | 2018-09-05 | 2018-09-05 | Dovetail-shaped tenon rotor blade detection clamp and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811032234.9A CN109186518B (en) | 2018-09-05 | 2018-09-05 | Dovetail-shaped tenon rotor blade detection clamp and detection method |
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| Publication Number | Publication Date |
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| CN109186518A CN109186518A (en) | 2019-01-11 |
| CN109186518B true CN109186518B (en) | 2021-03-30 |
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| CN201811032234.9A Active CN109186518B (en) | 2018-09-05 | 2018-09-05 | Dovetail-shaped tenon rotor blade detection clamp and detection method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319801B (en) * | 2019-07-11 | 2021-01-05 | 中国航发航空科技股份有限公司 | Three-coordinate measuring clamp for circular arc bottom surface tenon blade |
| CN113617987B (en) * | 2021-03-25 | 2023-04-07 | 中国航发南方工业有限公司 | Automatic feeding system for cold-rolled blade with tenon and machining method thereof |
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| CN102155928A (en) * | 2011-03-03 | 2011-08-17 | 西北工业大学 | Fixture for three-coordinate measuring machine of blade and method for establishing measuring coordinate system |
| CN101786237B (en) * | 2009-12-29 | 2012-10-10 | 东方电气集团东方汽轮机有限公司 | Fixture used for processing small moving blade in turbine and processing method thereof |
| RU156047U1 (en) * | 2015-01-23 | 2015-10-27 | Юрий Александрович Борисов | DEVICE FOR MEASURING THE INCORPORTIVITY OF THE HELICOPTER BLADES OF A HELICOPTER |
| DE102015206984A1 (en) * | 2015-04-17 | 2016-10-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for optical control of cooling air recesses of turbomachinery |
| CN106112582A (en) * | 2016-06-28 | 2016-11-16 | 中国南方航空工业(集团)有限公司 | The clamping device of blade |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201540106U (en) * | 2009-11-13 | 2010-08-04 | 中国航空工业集团公司北京航空材料研究院 | Measuring fixture for precision cast turbine blades |
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- 2018-09-05 CN CN201811032234.9A patent/CN109186518B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786237B (en) * | 2009-12-29 | 2012-10-10 | 东方电气集团东方汽轮机有限公司 | Fixture used for processing small moving blade in turbine and processing method thereof |
| CN102155928A (en) * | 2011-03-03 | 2011-08-17 | 西北工业大学 | Fixture for three-coordinate measuring machine of blade and method for establishing measuring coordinate system |
| RU156047U1 (en) * | 2015-01-23 | 2015-10-27 | Юрий Александрович Борисов | DEVICE FOR MEASURING THE INCORPORTIVITY OF THE HELICOPTER BLADES OF A HELICOPTER |
| DE102015206984A1 (en) * | 2015-04-17 | 2016-10-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for optical control of cooling air recesses of turbomachinery |
| CN106112582A (en) * | 2016-06-28 | 2016-11-16 | 中国南方航空工业(集团)有限公司 | The clamping device of blade |
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