CN112197671A - Device and method for detecting distance from blade fixed point to casing end face - Google Patents
Device and method for detecting distance from blade fixed point to casing end face Download PDFInfo
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- CN112197671A CN112197671A CN202011068483.0A CN202011068483A CN112197671A CN 112197671 A CN112197671 A CN 112197671A CN 202011068483 A CN202011068483 A CN 202011068483A CN 112197671 A CN112197671 A CN 112197671A
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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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- 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
- G01B5/0004—Supports
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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
- G01B5/003—Measuring of motor parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a device and a method for detecting the distance from a blade fixed point to the end face of a casing, which utilize a positioning measuring structure formed by a positioning measuring tool and a measuring rod, wherein the positioning measuring tool is provided with a measuring rod mounting hole and a plurality of positioning holes for accurately positioning the connecting hole of the end face of the casing of a workpiece to be detected, the measuring rod is arranged in the measuring rod mounting hole, a dial indicator on the measuring rod is utilized, the measuring rod of the dial indicator is connected with a measuring head on the measuring rod, the positioning measuring tool is positioned with the connecting hole of the end face of the casing of the workpiece to be detected through a positioning pin, the measuring head on the measuring rod can contact the surface of the fixed point at the air inlet edge of the blade of the workpiece to be detected, the whole workpiece to be detected does not need to be positioned in the measuring process, only the positioning measuring tool and the end face of the casing of the workpiece to be detected need to be aligned and positioned, the, and real-time detection in processing can be realized, and the detection and correction efficiency is improved.
Description
Technical Field
The invention belongs to the field of machine manufacturing, and particularly relates to a device and a method for detecting the distance from a blade fixed point to the end face of a casing.
Background
As shown in fig. 5 to 7, after assembling, welding and processing of an engine supercharging stage stator blade 13 and a supercharging stage casing 14, the distance from the inlet edge fixed point of the stator blade to the end face of the supercharging stage casing needs to be measured efficiently and precisely, as L in fig. 5 is the distance from the inlet edge fixed point of the blade to the end face of the supercharging stage casing, since the fixed point position of the stator blade is uncertain, the measurement is mainly performed on a three-coordinate measuring device at present, the three-coordinate measuring device has a complex structure and is troublesome to clamp, a workpiece or a clamp needs to be detached from a processing device during the processing, the workpiece or the clamp is placed on a three-coordinate system, the workpiece or the clamp is re-installed on the processing device after the detection and is corrected after alignment, the complexity and the feasibility are poor, the surface of a part to be measured at each stage is easily scratched, the efficiency of the three-coordinate measuring method is low (about 150 stator blades), greatly restricting the working efficiency.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the distance from a blade fixed point to the end face of a casing, so as to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a blade fixed point is to quick-witted casket terminal surface apart from detection device, including location survey utensil and measuring staff, be equipped with the measuring staff mounting hole on the location survey utensil and with the workpiece casing terminal surface lateral wall that awaits measuring location structure to it, the measuring staff is installed in the measuring staff mounting hole, be equipped with the percentage table on the measuring staff, the measuring staff of percentage table is connected with the gauge head on the measuring staff, during the measurement, the location structure of location survey utensil aligns the contact with workpiece casing terminal surface lateral wall that awaits measuring, gauge head on the measuring staff can contact workpiece blade air inlet edge fixed point position surface that awaits measuring.
Furthermore, the positioning structure on the positioning measuring tool is that a plurality of positioning holes are arranged on the positioning measuring tool or a positioning boss is arranged on the surface of the positioning measuring tool, which is attached to the end face of the casing of the workpiece to be measured; the inner side surface of the positioning boss can be attached to the outer side surface of the casing of the workpiece to be measured; the distance from the circle center of the measuring rod mounting hole to the arc line where the plurality of positioning holes are located is equal to the distance from the air inlet edge fixed point of the workpiece blade to be measured to the arc line where the connecting hole of the end face of the casing of the workpiece to be measured is located.
Furthermore, a positioning boss is arranged on the surface of the positioning measuring tool, which is attached to the end face of the casing of the workpiece to be measured, and the curvature of the inner side surface of the positioning boss is the same as that of the outer side surface of the casing of the workpiece to be measured.
Further, the measuring stick includes sleeve and gauge head, is equipped with spacing platform in the sleeve, and the gauge head sets up in the sleeve, and the tip of gauge head is provided with the stopper with spacing platform contact, and telescopic one end is fixed with the percentage table connecting seat, and on the percentage table was fixed in the percentage table connecting seat, the measuring stick of percentage table contacted with the one end of gauge head, and the other end of gauge head is used for and awaits measuring workpiece surface contact, is equipped with the spring between the one end of gauge head and the percentage table connecting seat.
Further, the percentage table connecting seat is well logical structure, and the one end of percentage table connecting seat is equipped with the internal thread, with the external screw thread connection of sleeve one end, and the other end of percentage table connecting seat is equipped with the external screw thread, and the measuring stick of percentage table sets up in the percentage table connecting seat and contacts with the one end tip of gauge head.
Furthermore, the dial indicator is locked and fixed on the dial indicator connecting seat through a dial indicator connecting nut.
Furthermore, one side of the positioning measuring tool is provided with a sleeve locking hole, and a locking screw for locking the sleeve is arranged in the sleeve locking hole.
Further, still including to the calibrating device, to table calibrating device includes the base and is fixed in table piece and locating piece on the base, passes through the fix with screw on the base to the table piece, and the locating piece up end is less than the up end to the table piece, and the locating piece up end is parallel with the up end to the table piece.
A method for detecting the distance from a blade fixed point to the end face of a casing comprises the following steps:
step 1), fixing a measuring rod in a measuring rod mounting hole of a positioning measuring tool, and calibrating and zeroing a measuring head of the measuring rod;
and 2) aligning and contacting a positioning structure of the positioning measuring tool with the side wall of the end face of the casing of the workpiece to be measured, contacting a measuring head of the measuring rod with the surface of the workpiece to be measured, reading a reading of a dial indicator on the measuring rod, wherein the sum of the reading of the dial indicator and a calibration value of the measuring rod is the distance from the fixed point of the blade to the end face of the casing.
Further, before measurement, the reference surface and the surface to be measured of the workpiece to be measured are wiped clean; after measuring a workpiece blade to be measured, the blade to be measured rotates along the circumferential direction of the casing of the workpiece to be measured, a measuring head of a measuring rod is positioned at the upper end of the next workpiece blade to be measured, a dial indicator is read after the positioning pin is used for positioning, and the distance measurement from the fixed point of the workpiece blade to be measured to the end face of the casing can be completed by repeating the steps.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a device for detecting the distance from a blade fixed point to the end face of a casing, which utilizes a positioning measurement structure formed by a positioning measurement tool and a measuring rod, wherein the positioning measurement tool is provided with a measuring rod mounting hole and a plurality of positioning holes for accurately positioning the connecting hole on the end face of the casing of a workpiece to be detected, the measuring rod is arranged in the measuring rod mounting hole, a dial indicator on the measuring rod is utilized, the measuring rod of the dial indicator is connected with a measuring head on the measuring rod, the positioning measurement tool is positioned with the connecting hole on the end face of the casing of the workpiece to be detected through a positioning pin, the measuring head on the measuring rod can contact the surface of the fixed point on the air inlet edge of the blade of the workpiece to be detected, the whole workpiece to be detected does not need to be positioned in the measurement process, only the positioning measurement tool needs to be aligned and positioned with the end face of the casing of the workpiece to be detected, and real-time detection in processing can be realized, and the detection and correction efficiency is improved.
Furthermore, a positioning boss is arranged on the surface, attached to the end face of the casing, of the workpiece to be detected, of the positioning measuring tool, the curvature of the inner side face of the positioning boss is the same as that of the outer side face of the casing of the workpiece to be detected, the positioning measuring tool is convenient to mount and position, and positioning accuracy is improved.
Furthermore, the measuring rod adopting the sleeve and the measuring head structure is simple in structure, convenient to detach and replace and high in measuring accuracy.
Furthermore, the meter calibration device is calibrated, so that the measurement data statistics is convenient and fast.
The invention relates to a method for detecting the distance from a blade fixed point to the end face of a casing, which is convenient and quick and has high accuracy.
Drawings
Fig. 1 is a schematic structural diagram of a positioning measuring tool in an embodiment of the invention.
Fig. 2 is a bottom view of fig. 1.
FIG. 3 is a schematic view of a measuring rod according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a meter calibration device in an embodiment of the present invention.
FIG. 5 is a schematic view of a booster stage stator assembly.
Fig. 6 is a side view of fig. 5.
Fig. 7 is a perspective view of a booster stage stator assembly.
Wherein, 1, positioning measuring tools; 2. a measuring rod; 3. a measuring head; 4. a sleeve; 5. a limiting block; 6. positioning holes; 7. a measuring rod mounting hole; 8. a spring; 9. a dial indicator connecting seat; 10. a nut; 11. a dial indicator; 12. connecting holes on the end face of the casing of the workpiece to be detected; 13. booster stage stator vanes; 14. a booster stage casing; 15. an inner ring; 16. positioning the boss; 17. a sleeve locking hole; 18. a base; 19. matching the table blocks; 20. and (5) positioning the blocks.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, 2, and 3, a device for detecting a distance from a blade fixed point to a casing end face includes a positioning measuring tool 1 and a measuring rod 2, the positioning measuring tool 1 is provided with a measuring rod mounting hole 7, the measuring rod 2 is mounted in the measuring rod mounting hole 7, the measuring rod 2 is provided with a dial indicator 11, the measuring rod of the dial indicator 11 is connected with a measuring head on the measuring rod 2, the positioning measuring tool 1 is provided with a positioning structure for aligning with a casing end face side wall of a workpiece to be measured, during measurement, the positioning structure of the positioning measuring tool 1 is aligned and contacted with the casing end face side wall of the workpiece to be measured, and the measuring head on the measuring rod 2 can contact with a fixed point position surface of a blade air inlet edge of the. Before measurement, the measuring rod 2 is fixed in the measuring rod mounting hole 7 of the positioning measuring tool 1, and the measuring head of the measuring rod 2 is calibrated and zeroed.
Specifically, a positioning structure on the positioning measuring tool 1 is provided with a plurality of positioning holes 6 through the positioning measuring tool 1 or a positioning boss 16 is arranged on one surface of the positioning measuring tool 1, which is attached to the end face of a casing of a workpiece to be measured; as shown in fig. 2, the curvature of the inner side surface of the positioning boss 16 is the same as that of the outer side surface of the casing of the workpiece to be measured, and the inner side surface of the positioning boss 16 can be attached to the outer side surface of the casing of the workpiece to be measured, so that the positioning measuring tool 1 can be conveniently positioned and installed.
The distance from the circle center of the measuring rod mounting hole 7 to the arc line where the positioning holes 6 are located is equal to the distance from the air inlet edge fixed point of the workpiece blade to be measured to the outer wall of the end face of the casing of the workpiece to be measured, namely, the positioning measuring tool 1 is in contact positioning with the side wall of the end face of the casing of the workpiece to be measured through the positioning pin, and the contact position of the measuring head on the measuring rod and the surface of the workpiece to be measured is the. Preferably, as shown in fig. 1, two positioning holes 6 are formed on the positioning measuring tool 1.
As shown in fig. 3, measuring staff 2 includes sleeve 4 and gauge head 3, be equipped with spacing platform in the sleeve 4, gauge head 3 sets up in sleeve 4, gauge head 3 can slide in sleeve 4, the tip of gauge head 3 sets up stopper 5, the one end of sleeve 4 is fixed with percentage table connecting seat 9, percentage table 11 is fixed in on the percentage table connecting seat 9, the measuring staff of percentage table 11 contacts with the one end of gauge head 3, the other end of gauge head 3 is used for and awaits measuring workpiece surface contact, be equipped with spring 8 between the one end of gauge head 3 and the percentage table connecting seat 9.
The dial indicator connecting seat 9 is a through structure, an internal thread is arranged at one end of the dial indicator connecting seat 9, the internal thread is connected with the external thread at one end of the sleeve 4, an external thread is arranged at the other end of the dial indicator connecting seat 9, a measuring rod of the dial indicator 11 is arranged in the dial indicator connecting seat 9 and is in contact with one end of the measuring head 3, and the dial indicator 11 is locked through a dial indicator connecting nut 10. The nut 10 is a through-hole lock nut.
One side of the positioning measuring tool 1 is provided with a sleeve locking hole 17, and a locking screw is arranged in the sleeve locking hole 17 and used for locking the sleeve 4.
The device comprises a base 18, a meter aligning block 19 and a positioning block 20, wherein the meter aligning block 19 and the positioning block 20 are fixed on the base 18, the meter aligning block 19 is fixed on the base 18 through a screw, the upper end surface of the positioning block 20 is lower than the upper end surface of the meter aligning block 19, and the upper end surface of the positioning block 20 is parallel to the upper end surface of the meter aligning block 19; when the dial gauge is calibrated, the end face of the positioning measuring tool 1 is contacted with the upper end face of the calibration block 19, and the position of the positioning measuring tool 1 is adjusted to enable the measuring head on the measuring rod 2 to be contacted with the upper end face of the positioning block 20, so that the zero calibration of the dial gauge is realized. Adopt annular structure to table piece 19, locating piece 20 sets up in the middle of table piece 19, and simple structure is convenient for location measuring tool 1 to the adjustment to the table.
The flatness of the upper end surface of the positioning block 20 and the upper end surface of the counter block 19 is less than 0.02 mm. The vertical distance between the upper end face of the positioning block 20 and the upper end face of the counter block 19 is a standard distance.
The method for detecting the distance from the blade fixed point to the end face of the casing based on the device for detecting the distance from the blade fixed point to the end face of the casing comprises the following steps:
step 1), fixing a measuring rod 2 in a measuring rod mounting hole 7 of a positioning measuring tool 1, and calibrating and zeroing a measuring head of the measuring rod 2;
and 2) aligning and contacting a positioning structure of a positioning measuring tool 1 with the side wall of the end face of the casing of the workpiece to be measured according to the structure of the workpiece to be measured, contacting a measuring head of a measuring rod 2 with the surface of the workpiece to be measured, reading a reading of a dial indicator on the measuring rod 2, wherein the sum of the reading of the dial indicator and a calibration value of the measuring rod 2 is the distance from a blade fixed point to the end face of the casing, taking down a positioning pin on the positioning measuring tool 1 after measuring a blade of the workpiece to be measured, rotating along the circumferential direction of the casing of the workpiece to be measured, positioning the measuring head of the measuring rod 2 at the upper end of the next blade of the workpiece to be measured, reading the reading of the dial indicator after positioning by adopting the positioning.
The calibration value of the measuring bar 2 refers to the distance from the measuring bar 2 to the surface of the measuring bar calibration device, namely the calibration value of the measuring bar calibration device, when the measuring bar 2 arranged on the positioning measuring tool 1 is calibrated and zeroed by the measuring bar calibration device.
Before measurement, the reference surface and the surface to be measured of the workpiece to be measured are wiped clean.
The positioning measuring tool 1 is in clearance fit with the central hole of the measuring rod 2, and the tolerance requirement is +/-0.01 mm.
The invention relates to a method for detecting the distance from a blade fixed point to the end face of a casing, which utilizes a positioning measurement structure formed by a positioning measurement tool 1 and a measuring rod 2, does not need to position the whole workpiece to be detected, only needs to align and position the positioning measurement tool with the end face of the casing of the workpiece to be detected, has simple structure, continuously measures a plurality of blades without moving the workpiece to be detected, has 2-3 hours of detection time relative to three-coordinate measurement equipment, has simple structure and low detection cost, can realize real-time detection in processing and has high detection precision.
Claims (10)
1. The utility model provides a blade fixed point is to quick-witted casket terminal surface distance detection device, a serial communication port, including location measuring tool (1) and measuring staff (2), be equipped with measuring staff mounting hole (7) on location measuring tool (1) and with the workpiece casing terminal surface lateral wall that awaits measuring to its location structure, measuring staff (2) are installed in measuring staff mounting hole (7), be equipped with percentage table (11) on measuring staff (2), the measuring staff of percentage table (11) is connected with the gauge head on measuring staff (2), during the measurement, the location structure of location measuring tool (1) aligns the contact with the workpiece casing terminal surface lateral wall that awaits measuring, gauge head on measuring staff (2) can contact the workpiece blade that awaits measuring and admit air limit fixed point position surface.
2. The device for detecting the distance from the blade fixed point to the end face of the casing according to claim 1, wherein the positioning structure on the positioning measuring tool (1) is that a plurality of positioning holes (6) are formed in the positioning measuring tool (1) or a positioning boss (16) is arranged on the surface, which is attached to the end face of the casing, of the workpiece to be detected on the positioning measuring tool (1); the inner side surface of the positioning boss (16) can be attached to the outer side surface of the casing of the workpiece to be measured; the distance from the circle center of the measuring rod mounting hole (7) to the arc line where the plurality of positioning holes (6) are located is equal to the distance from the air inlet edge fixed point of the workpiece blade to be measured to the outer wall of the end face of the casing of the workpiece to be measured.
3. The device for detecting the distance from the fixed point of the blade to the end face of the casing as claimed in claim 2, wherein the curvature of the inner side of the positioning boss (16) is the same as that of the outer side of the casing of the workpiece to be measured.
4. The device for detecting the distance from the fixed point of the blade to the end face of the casing according to claim 1, wherein the measuring rod (2) comprises a sleeve (4) and a measuring head (3), a limiting table is arranged in the sleeve (4), the measuring head (3) is arranged in the sleeve (4), a limiting block in contact with the limiting table is arranged at the end of the measuring head (3), a dial indicator connecting seat (9) is fixed at one end of the sleeve (4), a dial indicator (11) is fixed on the dial indicator connecting seat (9), the measuring rod of the dial indicator (11) is in contact with one end of the measuring head (3), the other end of the measuring head (3) is used for being in surface contact with a workpiece to be detected, and a spring (8) is arranged between one end of the measuring head (3) and the dial indicator connecting seat.
5. The device for detecting the distance from the fixed point of the blade to the end face of the casing according to claim 4, wherein the dial indicator connecting seat (9) is of a through structure, one end of the dial indicator connecting seat (9) is provided with an internal thread and is connected with an external thread at one end of the sleeve (4), the other end of the dial indicator connecting seat (9) is provided with an external thread, and the measuring rod of the dial indicator (11) is arranged in the dial indicator connecting seat (9) and is in contact with one end of the measuring head (3).
6. The device for detecting the distance from the fixed point of the blade to the end face of the casing according to claim 5, wherein the dial indicator (11) is locked and fixed on the dial indicator connecting seat (9) through a dial indicator connecting nut (10).
7. The device for detecting the distance from the blade fixed point to the end face of the casing according to claim 4, wherein a sleeve locking hole (17) is formed in one side of the positioning measuring tool (1), and a locking screw for locking the sleeve (4) is arranged in the sleeve locking hole (17).
8. The device for detecting the distance from the fixed point of the blade to the end face of the casing according to claim 1, further comprising a pair of meter calibrating device, wherein the pair of meter calibrating device comprises a base (18), and a pair of meter block (19) and a positioning block (20) which are fixed on the base (18), the pair of meter block (19) is fixed on the base (18) through a screw, the upper end face of the positioning block (20) is lower than the upper end face of the pair of meter block (19), and the upper end face of the positioning block (20) is parallel to the upper end face of the pair of meter block (19).
9. The blade fixed point-to-casing end surface distance detection method of the blade fixed point-to-casing end surface distance detection device according to claim 1, comprising the steps of:
step 1), fixing a measuring rod in a measuring rod mounting hole of a positioning measuring tool, and calibrating and zeroing a measuring head of the measuring rod;
and 2) aligning and contacting a positioning structure of the positioning measuring tool with the side wall of the end face of the casing of the workpiece to be measured, contacting a measuring head of the measuring rod with the surface of the workpiece to be measured, reading a reading of a dial indicator on the measuring rod, wherein the sum of the reading of the dial indicator and a calibration value of the measuring rod is the distance from the fixed point of the blade to the end face of the casing.
10. The method according to claim 9, wherein before the measurement, the reference surface and the surface to be measured of the workpiece are wiped clean; after measuring a workpiece blade to be measured, the blade to be measured rotates along the circumferential direction of the casing of the workpiece to be measured, a measuring head of a measuring rod is positioned at the upper end of the next workpiece blade to be measured, a dial indicator is read after the positioning pin is used for positioning, and the distance measurement from the fixed point of the workpiece blade to be measured to the end face of the casing can be completed by repeating the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011068483.0A CN112197671A (en) | 2020-09-29 | 2020-09-29 | Device and method for detecting distance from blade fixed point to casing end face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011068483.0A CN112197671A (en) | 2020-09-29 | 2020-09-29 | Device and method for detecting distance from blade fixed point to casing end face |
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| Publication Number | Publication Date |
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| CN112197671A true CN112197671A (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011068483.0A Pending CN112197671A (en) | 2020-09-29 | 2020-09-29 | Device and method for detecting distance from blade fixed point to casing end face |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899284A (en) * | 2021-09-29 | 2022-01-07 | 中国航发动力股份有限公司 | Measuring tool and measuring method for detecting thickness of coating of engine blade |
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| CN113899284A (en) * | 2021-09-29 | 2022-01-07 | 中国航发动力股份有限公司 | Measuring tool and measuring method for detecting thickness of coating of engine blade |
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Application publication date: 20210108 |