CN108680125B - Method for measuring area of special-shaped hole of aluminum extrusion and wire drawing die - Google Patents
Method for measuring area of special-shaped hole of aluminum extrusion and wire drawing die Download PDFInfo
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- CN108680125B CN108680125B CN201810478034.XA CN201810478034A CN108680125B CN 108680125 B CN108680125 B CN 108680125B CN 201810478034 A CN201810478034 A CN 201810478034A CN 108680125 B CN108680125 B CN 108680125B
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- area
- wire drawing
- die
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- 238000000034 method Methods 0.000 title claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 20
- 238000001125 extrusion Methods 0.000 title claims abstract description 20
- 238000005491 wire drawing Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 claims description 28
- 238000013507 mapping Methods 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 3
- 230000001788 irregular Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
- G01B11/285—Measuring arrangements characterised by the use of optical techniques for measuring areas using photoelectric detection means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Extrusion Of Metal (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a method for measuring the area of a special-shaped hole of an aluminum extrusion and wire drawing die. The method comprises the steps of measuring the actual length of a section of an aperture by using a projector capable of measuring the actual length of the aperture, taking a projection picture of the aperture, measuring the length of the section of the aperture and the area of the aperture in a picture by putting the section of the aperture in computer software, and finally calculating the actual sectional area of the aperture according to the ratio of the actual length of the aperture to the length in the picture. The invention does not need to purchase additional equipment for small and medium-sized cable companies, has low cost, simple and quick operation and high efficiency, and has no special requirement on the environment.
Description
Technical Field
The invention discloses a method for measuring the area of a special-shaped hole of a die, and relates to the technical field of area measurement of special-shaped holes of aluminum extrusion dies and wire drawing dies.
Background
When measuring the aperture area of the mold, the conventional mechanical measuring instrument cannot effectively measure the area of the irregular hole because the irregular hole is irregular in shape and deeply buried in the mold. And other instruments with higher precision, such as a pneumatic measuring instrument, an electric measuring instrument and the like, have high environmental requirements and are difficult to meet the conventional use efficiency of enterprises. In another measurement method in the prior art, a three-coordinate measuring machine is used for measuring the aperture measurement, although the resolution of the measurement is extremely high, the cost is too high, and enterprises cannot use the measurement on a large scale in actual production and manufacturing.
Disclosure of Invention
The invention aims to: in order to solve the problems of difficult measurement, complex operation, high cost and the like of the existing scheme, the invention discloses a method for measuring the thickness of a workpieceProvides a method for measuring the area of the special-shaped hole of the aluminum extrusion and wire drawing die, which can not only be accurate to 10-3Millimeter, no need for additional equipment purchase for small and medium-sized cable companies, low cost, simple and rapid operation, high efficiency and no special requirement for environment.
The technical scheme of the invention is as follows: in order to realize the purpose, the invention adopts the following technical scheme:
a method for measuring the area of a special-shaped hole of an aluminum extrusion and wire drawing die uses measuring equipment comprising a projector and shooting equipment, wherein the shooting angle of the shooting equipment is parallel to a projection screen; the method comprises the steps of obtaining an image of a special-shaped hole of the mould through shooting equipment; measuring an image of a special-shaped hole of the mold to obtain the aperture area in the image; and calculating the aperture area in the image to obtain the actual area of the aperture of the die.
As a further preferable scheme of the invention, when the method is applied to measurement of a special-shaped die hole containing a reducing hole, the shape and the sectional area of the hole at the position of the minimum section of the reducing hole need to be measured; the method is suitable for the die with coaxial die holes and any cross section for aluminum extrusion and wire drawing.
The measuring method comprises the following specific steps:
(1) calibrating the accuracy of the measuring equipment;
(2) measuring the mold;
201) placing the special-shaped hole die on a workbench from the small surface;
202) adjusting the x axis to align the 0 point of the x axis with any point on the left side of the hole in the projector;
203) moving the X axis left and right to align with the right side point of the hole in the projector, recording the length X1, and taking a picture by using a shooting device;
204) adjusting the y axis to align the 0 point of the y axis with any point on the opposite side of the hole in the projector;
205) moving the Y axis up and down to align with the opposite side point of the hole in the projector, recording the length Y1, and taking a picture by using a shooting device;
(3) graph fitting, namely drawing a graph of the shot picture along the outline of the graph by using drawing software, and drawing lines (the length is X2, Y2) of paths of 0 points of an X axis and a Y axis in the two pictures;
(4) measuring the size;
401) adjusting the scale of the drawn graph to enable X2 to be equivalent to or stretch in equal proportion to X1, and then mapping the area;
402) adjusting the scale of the drawn graph to enable Y2 to be equivalent to or stretch in equal proportion to Y1, and then drawing the area;
403) and taking the arithmetic mean of the two mapped areas to obtain the hole area of the special-shaped hole die.
As a further preferable mode of the present invention, in the method, after the start of measurement, the mold is fixed so that the measurement end face of the hole is perpendicular to the projector.
As a further preferred aspect of the invention, the method further comprises measuring the size of the holes through a gauge-length curtain using a projection device.
As a further preferable aspect of the present invention, the method further comprises performing measurement by scaling up and down by a double mirror.
As a further preferable scheme of the invention, the method further comprises the step of measuring the size in the hole by adopting a method of oblique projection and then software compensation.
As a further preferable aspect of the present invention, the method further includes setting a corresponding compensation coefficient through a plurality of measurements to achieve the measurement of the dimension.
As a further preferable aspect of the present invention, the method further includes selecting a reference line in an arbitrary direction as a basis for measurement.
As a further preferable scheme of the present invention, in the graph fitting process in the step (3), the graph fitting is performed by using a software automatic fitting or manual fitting manner, and the larger the length of the multi-segment line is, the more favorable the improvement of the measurement accuracy is.
As a further preferable embodiment of the present invention, in the dimension measuring process in the step (4), the measurement of the area of the shaped hole is realized by calculating through a shrinkage pattern in which the length of the shaft is proportional.
The invention has the beneficial effects that: the measuring method disclosed by the invention can be used for accurately measuring the aperture area of the aluminum extrusion die at zero cost for small and medium-sized cable companies, is simple and quick to operate and has no special requirements on the environment.
Drawings
Fig. 1 shows a projector used for measurement in the present invention.
Fig. 2 is a left side view of the projector in the present invention.
Fig. 3 and 4 are schematic diagrams of outline drawing and axis marking of X-axis and Y-axis in the graph fitting step in the present invention.
Detailed Description
The technical solution of the present invention is described in detail below by way of specific embodiments with reference to the accompanying drawings.
In the projector for measurement use as shown in fig. 1, a power switch and a dimmer switch 6 are turned on, a mold is placed on a workbench 4, a focusing handwheel 1 is rotated to make the projection screen 7 clearly influenced, an X-axis adjusting screw 2 or a Y-axis adjusting screw 3 is rotated, the real length 9 and 10 of a certain length of the mold projection 8 on the projection screen 7 (namely the length X1 and Y1 of the movement of 0 point of the X-axis and the Y-axis) is measured, the length displayed by an LED display screen 5 is recorded, and finally a picture projected on the projection screen 7 is taken.
The method for measuring the area of the special-shaped hole of the aluminum extrusion and wire drawing die comprises the following measuring steps:
(1) calibrating measurement device accuracy
And opening the ruler, putting the ruler on a workbench, measuring the opening length of the ruler by using a projector for three times, and identifying the measurement precision of the projector.
(2) Measuring die
a) Placing the special-shaped hole die on a workbench from the small surface;
b) adjusting the x-axis to align the 0 point of the x-axis with any point on the left side of the hole in the projector,
c) moving the X axis left and right (the y axis can not be moved) to align with the right side point of the hole in the projector, recording the length X1, and taking a picture by using the projector;
d) the Y-axis is adjusted so that the 0 point of the Y-axis is aligned with an arbitrary point on the side opposite the hole in the projector, the Y-axis is moved up and down (the Y-axis cannot be moved) so as to be aligned with the side point on the side opposite the hole in the projector, the length Y1 is recorded, and the projector is used to take a picture.
(3) Fitting of patterns
a) Importing the photos shot twice into drawing software;
b) the drawing software tool was used to draw the figure along the outline of the figure of the photographs and to draw the lines (length X2, Y2) of the X-axis and Y-axis origin paths in the two photographs, as shown in fig. 3 and 4.
(4) Dimensional measurement
a) The rendered image is scaled so that X2 is comparable to or scaled to X1, and then the area is mapped using the mapping software.
b) The rendered graphic is scaled so that Y2 is comparable to or scaled to Y1, and then the area is mapped using the mapping software.
c) And taking the arithmetic mean of the two mapped areas to obtain the area of the die hole.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for measuring the area of a special-shaped hole of an aluminum extrusion and wire drawing die is characterized by comprising the following steps: the method uses a measuring device comprising a projector and a shooting device, wherein the shooting angle of the shooting device is parallel to a projection screen;
the method comprises the steps of obtaining an image of a special-shaped hole of the mould through shooting equipment;
measuring an image of a special-shaped hole of the mold to obtain the aperture area in the image;
the measuring method comprises the following specific steps:
(1) calibrating the accuracy of the measuring equipment;
(2) measuring the mold;
201) placing the special-shaped hole die on a workbench from the small surface;
202) adjusting the x axis to align the 0 point of the x axis with any point on the left side of the hole in the projector;
203) moving the X axis left and right to align with the right side point of the hole in the projector, recording the length X1, and taking a picture by using a shooting device;
204) adjusting the y axis to align the 0 point of the y axis with any point on the opposite side of the hole in the projector;
205) moving the Y axis up and down to align with the opposite side point of the hole in the projector, recording the length Y1, and taking a picture by using a shooting device;
(3) graph fitting, namely drawing a graph of the shot picture along the outline of the graph by using drawing software, and drawing lines of paths of 0 points of an X axis and a Y axis in the two pictures, wherein the lengths of the lines are X2 and Y2;
(4) measuring the size;
401) adjusting the scale of the drawn graph to enable X2 to be equivalent to or stretch in equal proportion to X1, and then mapping the area;
402) adjusting the scale of the drawn graph to enable Y2 to be equivalent to or stretch in equal proportion to Y1, and then drawing the area;
403) taking the arithmetic mean of the two mapped areas to obtain the hole area of the special-shaped hole die;
and calculating the aperture area in the image to obtain the actual area of the aperture of the die.
2. The method for measuring the area of the profiled hole of the aluminum extrusion and wire drawing die as claimed in claim 1, wherein: when the method is applied to measurement of the special-shaped die hole containing the variable-diameter hole, the shape and the sectional area of the hole at the position of the minimum section of the variable-diameter hole need to be measured;
the method is suitable for the die with coaxial die holes and any cross section for aluminum extrusion and wire drawing.
3. The method for measuring the area of the profiled hole of the aluminum extrusion and wire drawing die as claimed in claim 1, wherein: in the method, after the start of measurement, the mold is fixed so that the measurement end face of the hole is perpendicular to the projector.
4. A method of measuring the profiled hole area of an aluminium extrusion, wire drawing die as claimed in claim 1 or 3, wherein: the method also includes measuring a size of the hole through the pitched curtain using the projection device.
5. A method of measuring the profiled hole area of an aluminium extrusion, wire drawing die as claimed in claim 1 or 3, wherein: the method further comprises performing measurement by scaling up and down the lens in equal proportion.
6. A method of measuring the profiled hole area of an aluminium extrusion, wire drawing die as claimed in claim 1 or 3, wherein: the method also comprises the step of measuring the size in the hole by adopting a method of oblique projection and then software compensation.
7. The method for measuring the area of the profiled hole of the aluminum extrusion and wire drawing die as claimed in claim 3, wherein: the method further comprises setting corresponding compensation coefficients through multiple measurements to achieve the measurement of the size.
8. The method for measuring the area of the profiled hole of the aluminum extrusion and wire drawing die as claimed in claim 3, wherein: the method further comprises selecting a datum line in any direction as a basis for measurement.
9. The method for measuring the area of the profiled hole of the aluminum extrusion and wire drawing die as claimed in claim 3, wherein: in the graph fitting process in the step (3), the graph fitting is carried out in a mode of automatic software fitting or manual fitting, and the larger the length of the multi-section line is, the better the measurement precision is.
10. The method for measuring the area of the profiled hole of the aluminum extrusion and wire drawing die as claimed in claim 3, wherein: in the dimension measuring process of the step (4), the measurement of the area of the special-shaped hole is realized through calculating by using a shrinkage pattern with the shaft length in proportion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810478034.XA CN108680125B (en) | 2018-05-18 | 2018-05-18 | Method for measuring area of special-shaped hole of aluminum extrusion and wire drawing die |
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| CN201810478034.XA CN108680125B (en) | 2018-05-18 | 2018-05-18 | Method for measuring area of special-shaped hole of aluminum extrusion and wire drawing die |
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| CN108680125B true CN108680125B (en) | 2020-05-29 |
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| CN113091656B (en) * | 2021-03-25 | 2022-09-30 | 中国航发南方工业有限公司 | Method and system for measuring cross-sectional area of closed special-shaped narrow-channel part |
| CN114406001B (en) * | 2022-01-26 | 2023-12-26 | 北京首钢股份有限公司 | Rolled piece shearing control method, device and equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201344792Y (en) * | 2008-12-17 | 2009-11-11 | 中国科学院上海光学精密机械研究所 | Object three-dimensional profile measuring device |
| CN101726262A (en) * | 2008-10-13 | 2010-06-09 | 株式会社高永科技 | Three dimension shape measuring method |
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| US6891967B2 (en) * | 1999-05-04 | 2005-05-10 | Speedline Technologies, Inc. | Systems and methods for detecting defects in printed solder paste |
| JP4046010B2 (en) * | 2002-08-27 | 2008-02-13 | 東海ゴム工業株式会社 | Dynamic damper |
| CN101319882A (en) * | 2008-07-02 | 2008-12-10 | 朱凯生 | Detection method for thread diameter of textile dragging thread |
| CN101907442B (en) * | 2009-06-08 | 2013-07-31 | 鸿富锦精密工业（深圳）有限公司 | Projection type measuring device |
| CN201876244U (en) * | 2010-11-22 | 2011-06-22 | 四川辉煌测控设备有限公司 | Intelligent inner hole measurer for wire production dies |
| CN201955069U (en) * | 2010-11-23 | 2011-08-31 | 西安科维实电力技术有限公司 | Optical pore diameter measurer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101726262A (en) * | 2008-10-13 | 2010-06-09 | 株式会社高永科技 | Three dimension shape measuring method |
| CN201344792Y (en) * | 2008-12-17 | 2009-11-11 | 中国科学院上海光学精密机械研究所 | Object three-dimensional profile measuring device |
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Denomination of invention: A method for measuring the area of special-shaped hole of aluminum extrusion and wire drawing die Effective date of registration: 20220726 Granted publication date: 20200529 Pledgee: Lianyungang Branch of Suzhou Bank Co.,Ltd. Pledgor: ZHONGFU CARBON FIBER CORE CABLE TECHNOLOGY Co.,Ltd. Registration number: Y2022320010419 |
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Granted publication date: 20200529 Pledgee: Lianyungang Branch of Suzhou Bank Co.,Ltd. Pledgor: ZHONGFU CARBON FIBER CORE CABLE TECHNOLOGY Co.,Ltd. Registration number: Y2022320010419 |