CN114777719B - Tooling detection method based on reverse scanning - Google Patents
Tooling detection method based on reverse scanning Download PDFInfo
- Publication number
- CN114777719B CN114777719B CN202210274524.4A CN202210274524A CN114777719B CN 114777719 B CN114777719 B CN 114777719B CN 202210274524 A CN202210274524 A CN 202210274524A CN 114777719 B CN114777719 B CN 114777719B
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- China
- Prior art keywords
- tool
- fitting
- detection method
- reverse scanning
- method based
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims description 24
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Classifications
-
- 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
- G01B21/20—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 contours or curvatures, e.g. determining profile
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention belongs to the technical field of tool measurement, and discloses a tool detection method based on reverse scanning, which comprises the following steps: step one: placing a tool to be tested on a special measuring platform; step two: scanning the actual profile of the tool to be tested through a reverse scanning system of the articulated arm type measuring machine; measuring a reference hole, a mounting hole and a tool scribing of the tool to be measured through a measuring system; step three: fitting and comparing the scanned actual profile of the tool with a theoretical digital-to-analog of the tool; step four: and according to the fitting comparison structure, a data detection report is provided and data is stored. The invention overcomes the defects of the prior art, and is simple, practical, accurate and quick.
Description
Technical Field
The invention belongs to the technical field of tool measurement, and relates to a tool detection method based on reverse scanning.
Background
After a series of mechanical processing is carried out on the aircraft metal plate gold tool, whether a molded surface and a scribed line conform to a three-dimensional mold or not is detected, the tolerance is smaller, a conclusion or a quantized data report is provided, the two methods are currently available, the first method is mainly based on three-coordinate detection, red liner powder is coated on a measuring head, the tool molded surface is touched on the tool molded surface through an operation program, the tool molded surface is dipped with the red liner powder, whether the scribed line exceeds a red liner powder area or not is observed, and a qualified or unqualified conclusion is provided, and the detection method is difficult to observe due to the smaller tolerance and has errors; the second kind of three-coordinate measurement or photographic measurement with joint arm type, the method needs to project the measured point onto the theoretical digital model, then make data comparison, or directly make the measured point data comparison, and then make data report.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a tooling detection method based on reverse scanning, which is quick and accurate.
A tool detection method based on reverse scanning comprises the following steps:
step one: placing a tool to be tested on a special measuring platform;
step two: scanning the actual profile of the tool to be tested through a reverse scanning system of the articulated arm type measuring machine; measuring a reference hole, a mounting hole and a tool scribing of the tool to be measured through a measuring system;
step three: fitting and comparing the scanned actual profile of the tool with a theoretical digital-to-analog of the tool;
step four: and according to the fitting comparison structure, a data detection report is provided and data is stored.
Further, the step one further includes: and cleaning the measuring reference hole and the surface greasy dirt of the tool to be measured. So as to ensure that burrs and oil stains generated by tooling processing are reduced.
Further, in the third step, fitting is performed by a first method: and (3) fitting the to-be-measured tool reference hole obtained in the step two with the theoretical reference hole, and comparing whether the molded surface is out of tolerance. The theoretical digital model has a tool reference, and the report can be obtained by fitting and detecting the theoretical digital model by the method and can be used for next processing and repairing.
Further, in the third step, fitting is performed by a second method: and (3) performing optimal fitting on the actual molded surface of the tool to be tested obtained in the second step and the theoretical molded surface of the digital-analog. The profile fitting method may ignore measurement errors due to fiducial hole errors.
In the third step, if the profile is out of tolerance after fitting by the first method, the second method is adopted for re-fitting. And the equal-size out-of-tolerance indicates that the detection hole is eccentric, but the tool profile and the theoretical profile actually meet the design requirement.
In the third step, if the tool to be tested has no reference hole, the second method is directly used for fitting. Reference hole fitting cannot be used without reference holes.
Further, the third step further includes: after fitting, establishing a cylindrical surface for each mounting hole measured in the second step; comparing the established cylindrical surface center line with a theoretical cylindrical surface center line; judging whether the mounting hole is out of tolerance. The hole position measurement is inaccurate during scanning.
Further, the third step further includes: and (3) projecting the tool score line measured in the step two onto the actual profile of the tool obtained by scanning, comparing the tool score line with the theoretical score line, and judging whether the tool score line is out of tolerance. And the line is projected onto the actual molded surface, so that errors caused by the depth of the line can be reduced, and the line errors caused by the molded surface of the tool are reserved.
The invention has the following effects:
compared with the conventional measuring method, the tool detection method based on the reverse scanning provided by the invention can accurately and conveniently measure whether the scribing line and the profile of the tool are out of tolerance or not, can provide a detection data report, and is also suitable for tools without reference holes.
Drawings
FIG. 1 is a schematic illustration of a scan alignment;
FIG. 2 is a schematic illustration of a post-scan profile;
FIG. 3 is a schematic diagram of a hole site;
fig. 4 is a schematic view of the local deviation after reticle projection.
Detailed Description
A tool detection method based on reverse scanning, taking actual reverse scanning tool as reference, projecting detected line onto scanned actual tool profile, comparing with theoretical work digital-to-analog, and giving numerical report or detection conclusion after comparison, comprising:
step 1, after the measured tool is cleaned and measured with burrs of the orifice of the reference hole and greasy dirt on the surface of the tool, so as to ensure that errors caused by burrs and greasy dirt generated by tool processing are reduced, the tool is placed on a special measuring platform for inspection, and the relative accuracy of the tool measuring result can be ensured.
And 2, scanning the actual profile by using a reverse scanning system of the articulated arm type measuring machine, and measuring a measuring reference hole, other hole positions and tool scribing lines by using the measuring system.
And 3, performing best fitting on the actual molded surface and the theoretical digital-analog by using Geomagic X measuring software and combining the scanned molded surface, the measured hole site, the measured score line and the theoretical digital-analog, and then comparing.
And step 4, storing data and simultaneously providing a data detection report for the judgment of the inspector according to the comparison result. The theoretical digital model has a tool reference, and the report can be obtained by fitting and detecting the theoretical digital model by the method and can be used for next processing and repairing.
The step 3 further includes:
and 3.1, after fitting, establishing a cylindrical surface for the measured hole position, comparing the established cylindrical center line with the theoretical hole cylindrical center line, judging whether the theoretical hole cylindrical center line exceeds the theoretical hole cylindrical center line, and reporting.
And 3.2, comparing whether the molded surface is out of tolerance, judging whether the molded surface is out of tolerance, and reporting.
And 3.3, projecting the actual score line on the side onto the surface of the scanned actual profile, comparing the actual score line with the theoretical score line, judging whether the actual score line is out of tolerance, and reporting.
In the step 1, the tool measurement reference hole is made to be upward or at a position which can be conveniently measured.
The detection platform should be equipped with V-shaped magnets of different specifications for detecting small-sized tools.
Step 3.1 comprises two fitting methods, namely, a first fitting method, wherein after a measurement reference hole site is fitted with a theoretical reference hole site, whether the molded surface is out of tolerance is compared; and in the second fitting method, the scanned actual profile and the digital-analog theoretical profile are optimally fitted.
After the fitting in the step 3.1, if the fact that the measured actual molded surface and the theoretical molded surface have out-of-tolerance conditions and the out-of-tolerance is equal-size out-of-tolerance, the fact that the actual detection hole and the theoretical detection hole have deviation at the moment is indicated, and a second method is adopted at the moment; if the tool to be tested has no measurement reference hole and cannot use the first method, the second method is directly used.
The step 3.3 should be performed after the measurement data of the step 3.2 are qualified, so as to reduce unnecessary operations.
In the step 4, the stored data can be used for inspection by an inspector, and a technician can be provided for analyzing the position of the super-difference point and making a repair scheme.
Examples
1. As shown in fig. 1, first, initial alignment is performed, then the alignment direction is ensured by switching the alignment, and finally the alignment accuracy is ensured by 3-2-1 alignment.
After the alignment of fig. 3 is completed, geometric comparison is selected in geomic X, and the position degree of the hole site is determined.
2. After the hole position is determined, the position of the required profile is selected through 3D comparison, and deviation of the profile is obtained, as shown in figure 2.
3. The point cloud obtained by scanning is processed into a surface patch form through surface patch processing, a curve is selected, a theoretical contour line (curve 1) is selected by a frame, the theoretical contour line is projected onto the surface patch to obtain a new contour line (curve 2), and then the measured curve is projected onto the surface patch to obtain a curve 3. By comparing the curve 2 and the curve 3, the contour deviation of the part line is obtained.
4. As shown in fig. 4, the error between the established patch and the initial point cloud is checked in geomatic X to determine whether the measurement is correct.
5. And (5) finally, concluding and reporting.
Claims (6)
1. The tool detection method based on reverse scanning is characterized by comprising the following steps of: the method comprises the following steps:
step one: placing a tool to be tested on a special measuring platform;
step two: scanning the actual profile of the tool to be tested through a reverse scanning system of the articulated arm type measuring machine; measuring a reference hole, a mounting hole and a tool scribing of the tool to be measured through a measuring system;
step three: using Geomagic X measuring software, combining a scanning molded surface, a measuring hole site, a measuring score line and a theoretical digital-to-analog, and carrying out fitting comparison on the scanned actual molded surface of the tool and the theoretical digital-to-analog of the tool; after fitting, establishing a cylindrical surface for each mounting hole measured in the second step; comparing the established cylindrical surface center line with a theoretical cylindrical surface center line; judging whether the mounting hole is out of tolerance; after the hole position degree is determined, the position of the required molded surface is selected through 3D comparison, and the deviation of the profile degree is obtained; projecting the tool scribing measured in the second step onto the actual profile of the tool obtained by scanning, comparing the tool scribing with the theoretical scribing, and judging whether the tool scribing is out of tolerance;
step four: and according to the fitting comparison structure, a data detection report is provided and data is stored.
2. The tooling detection method based on reverse scanning according to claim 1, wherein the tooling detection method based on reverse scanning is characterized in that: the first step further comprises the following steps: and cleaning the measuring reference hole and the surface greasy dirt of the tool to be measured.
3. The tooling detection method based on reverse scanning according to claim 2, wherein the tooling detection method based on reverse scanning is characterized in that: in the third step, fitting is performed by a first method: and (3) fitting the to-be-measured tool reference hole obtained in the step two with the theoretical reference hole, and comparing whether the molded surface is out of tolerance.
4. A reverse scanning-based tool detection method according to claim 3, wherein: in the third step, fitting is performed by a second method: and (3) performing optimal fitting on the actual molded surface of the tool to be tested obtained in the second step and the theoretical molded surface of the digital-analog.
5. The tooling detection method based on reverse scanning of claim 4, wherein the tooling detection method based on reverse scanning is characterized in that: in the third step, if the profile out-of-tolerance is equal-size out-of-tolerance after fitting by the first method, re-fitting by the second method.
6. The tooling detection method based on reverse scanning of claim 5, wherein the tooling detection method based on reverse scanning is characterized in that: in the third step, if the tool to be tested has no reference hole, the second method is directly used for fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210274524.4A CN114777719B (en) | 2022-03-21 | 2022-03-21 | Tooling detection method based on reverse scanning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210274524.4A CN114777719B (en) | 2022-03-21 | 2022-03-21 | Tooling detection method based on reverse scanning |
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| Publication Number | Publication Date |
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| CN114777719A CN114777719A (en) | 2022-07-22 |
| CN114777719B true CN114777719B (en) | 2023-12-22 |
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| CN202210274524.4A Active CN114777719B (en) | 2022-03-21 | 2022-03-21 | Tooling detection method based on reverse scanning |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465246A (en) * | 2013-09-17 | 2013-12-25 | 吴林波 | Rough casting marking-off method and marking-off device |
| CN109112446A (en) * | 2018-09-13 | 2019-01-01 | 湖北三江航天红阳机电有限公司 | Large thin-wall high strength alumin ium alloy bipyramid diamond shape entirety cabin shell precision casting molding method |
| CN109117602A (en) * | 2018-10-17 | 2019-01-01 | 江西洪都航空工业集团有限责任公司 | Large scale covering digitizing detection method based on laser tracker |
| CN113405487A (en) * | 2021-06-03 | 2021-09-17 | 梦达驰汽车系统（天津）有限公司 | Rapid positioning and high-precision 3D scanning measurement method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7421370B2 (en) * | 2005-09-16 | 2008-09-02 | Veeco Instruments Inc. | Method and apparatus for measuring a characteristic of a sample feature |
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2022
- 2022-03-21 CN CN202210274524.4A patent/CN114777719B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465246A (en) * | 2013-09-17 | 2013-12-25 | 吴林波 | Rough casting marking-off method and marking-off device |
| CN109112446A (en) * | 2018-09-13 | 2019-01-01 | 湖北三江航天红阳机电有限公司 | Large thin-wall high strength alumin ium alloy bipyramid diamond shape entirety cabin shell precision casting molding method |
| CN109117602A (en) * | 2018-10-17 | 2019-01-01 | 江西洪都航空工业集团有限责任公司 | Large scale covering digitizing detection method based on laser tracker |
| CN113405487A (en) * | 2021-06-03 | 2021-09-17 | 梦达驰汽车系统（天津）有限公司 | Rapid positioning and high-precision 3D scanning measurement method |
Non-Patent Citations (1)
| Title |
|---|
| 王小军 等.《运载火箭数字样机工程》.中国宇航出版社,2017,第191~193页. * |
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| CN114777719A (en) | 2022-07-22 |
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