CN114526681A - Method for measuring size of inner hole of hard alloy bar - Google Patents
Method for measuring size of inner hole of hard alloy bar Download PDFInfo
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- CN114526681A CN114526681A CN202210234947.3A CN202210234947A CN114526681A CN 114526681 A CN114526681 A CN 114526681A CN 202210234947 A CN202210234947 A CN 202210234947A CN 114526681 A CN114526681 A CN 114526681A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000956 alloy Substances 0.000 title claims abstract description 27
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a method for measuring the size of an inner hole of a hard alloy bar, which comprises the following steps: horizontally placing a hard alloy bar to be detected on a detection table, wherein the end face of the bar is right opposite to a right-angle prism, and an objective lens is arranged right above the right-angle prism and is connected with a computer through a data line; during testing, the end face of the bar is projected onto the objective lens in equal proportion through the right-angle prism, the objective lens is displayed on a computer screen through data transmission, 5 points are uniformly selected along the edge of an inner hole according to the end face of the bar on the computer screen, a graph of the inner hole is obtained according to a method of drawing a circle by the 5 points, and the diameter of the inner hole is directly read. The method is simple and quick to operate, is suitable for production detection of a large number of products, is novel and unique in measuring method, and has obvious effect of guiding production of the inner-cooling spiral hole bar products.
Description
Technical Field
The invention belongs to the technical field of hard alloy cutting materials, and particularly relates to a method for measuring the size of an inner hole of a hard alloy bar.
Background
The hard alloy bar with the inner cooling hole is a representative product of a high and new technology of superfine hard alloy, and hard alloy bar products with the hole diameter of 0.4-3.0mm are available two decades ago abroad. Along with the demand of the hard alloy bar with the inner cooling hole (such as an inner cooling spiral hole bar, a straight hole bar and a gun drill) on the market is larger and larger, and the precision requirement of cutting processing on the size of a product is higher and higher, the technical problem how to accurately test the inner hole parameters of the hard alloy bar with the inner cooling hole is also an urgent need to be solved.
In patent publication No. CN108613613A, a workpiece inner hole detection device and a detection assembly line and a use method thereof are disclosed, the workpiece inner hole detection device includes a sorting mechanism, a detection mechanism, and a judgment mechanism, and judges whether the measurement section is inserted into the inner hole. The patent is a rough qualitative detection device and cannot quantitatively detect the size of an inner hole.
In patent publication No. CN208125009U, a work piece hole detection device is disclosed, its technical scheme main points are be provided with on the base just right to locating pin cover and with the detection round pin that work piece hole diameter size equals, this patent is qualitative detection device, unable quantitative determination.
In patent publication No. CN208187353U, an inner hole imaging measuring instrument is disclosed, by which not only the measurement of the size of an inner hole is realized, but also multi-section map image collection can be firstly carried out on the inner hole wall, and finally, a complete image of the inner hole wall is obtained after the collected multi-section images are sequentially spliced through an image processing device, but the inner hole with a larger diameter can only be detected, and the inner hole with a diameter of 0.4-3.0mm cannot be detected.
In patent publication No. CN108507444A, a device and a method for detecting the diameter of an inner hole at a special position of a workpiece are disclosed, four ends of four measuring contact rods, four extension rods and a cross measuring rod of the device are sequentially connected through threads, one end of each measuring contact rod is a spherical end face, and a handle is vertically arranged at the center of the cross measuring rod. The measuring contact rod is inserted into the inner hole through the handle to measure the diameters in the X direction and the Y direction, then the measuring contact rod is rotated by a certain angle in sequence to measure and obtain the measured value under each angle, the actual diameters of the inner hole of the workpiece in the X direction and the Y direction are obtained by taking the average value, and the difference between the actual diameters in the X direction and the Y direction is the roundness of the inner hole of the workpiece. The patent is that the contact rod type measures the diameter of an inner hole, only can detect a hole with a larger diameter, and cannot detect the inner hole with the diameter of 0.4-3.0 mm.
Patent publication No. CN101701805A discloses an inner hole detection method with high measurement accuracy and a special detection device. The method is characterized in that two hole sections are selected along a pore passage, a reference axis is established by using the center points of the two hole sections, the deviation between the center points of other hole sections of the pore passage and the reference axis is observed, and finally the detection data of the inner hole is obtained. This patent can only detect the great hole of diameter, can't detect the hole of aperture 0.4 ~ 3.0 mm.
In summary, the existing patents for detecting the size of the inner hole of the workpiece are either rough qualitative detection devices or can only quantitatively detect the inner hole with a larger diameter, and cannot detect the inner hole with a diameter of 0.4-3.0 mm.
Disclosure of Invention
The invention aims to provide a method for accurately measuring the size of an inner hole of a hard alloy bar; in the method, prism light refraction is used, the end face of a horizontal hard alloy hole rod product is thrown into a vertical objective lens of a coordinate instrument, the vertical objective lens is displayed on a computer screen according to the size ratio of 1:1, finally, a hole pattern is planned through a five-point circle drawing method, drawing is carried out through a series of circle center connecting lines, center connecting lines and included angles, and the size of an inner hole of the hole rod can be accurately measured.
The method for measuring the size of the inner hole of the hard alloy bar comprises the following steps:
1) horizontally placing a hard alloy bar to be detected on a detection table, wherein the end face of the bar is right opposite to a right-angle prism, and an objective lens is arranged right above the right-angle prism and is connected with a computer through a data line;
2) during testing, the end face of the bar is projected onto the objective lens in an equal proportion through the right-angle prism, the objective lens is displayed on a computer screen through data transmission, 5 points are uniformly selected along the edge of the inner hole according to the end face of the bar on the computer screen, a graph of the inner hole is obtained according to a method of drawing a circle by the 5 points, and the diameter of the inner hole is directly read.
In the step 1), an included angle between the right-angle prism and the detection table is 45 degrees.
In the step 2), when the hard alloy bar is a double-hole bar, drawing the graphs of two inner holes, and then connecting the centers of the inner holes to obtain the length of the line segment, namely the hole spacing size.
Preferably, in the step 2), 5 points are uniformly drawn on the root circle of the excircle of the bar product to obtain the excircle of the bar, the circle center M of the excircle of the bar is further determined, the circle center M of the excircle of the bar is connected with the midpoint N of a connecting line between the circle center M of the excircle of the bar and the hole spacing, and the length of the obtained line segment MN is the eccentric distance of the double-hole bar, which is the size of the connecting line.
In the step 2), when the hard alloy bar is a three-hole bar, obtaining the graph of 3 inner holes by a 5-point circle drawing method, determining the circle center of the graph, then sequentially clicking the circle centers of 3 holes to draw a circle at 3 points, and directly reading the diameter size of the drawn circle, namely the hole pitch size
Preferably, 5 points are uniformly drawn on the root circle of the excircle of the bar product to obtain the excircle of the bar, the circle center M of the excircle of the bar is further determined, then the circle center M of the bar is sequentially connected with 3 inner hole circle centers to form 3 straight lines, and the adjacent included angles of the 3 straight lines are sequentially measured to obtain the hole symmetry size of the three-hole bar.
The invention has the beneficial effects that: 1) the method of the invention uses the principle similar to a projector, the end face of an inner cooling spiral hole rod product is displayed on an objective lens according to the size of 1:1, then the end face is displayed on a computer screen according to a set ratio through the objective lens, a hole pattern is planned to be drawn through a five-point circle drawing method, and drawing is performed through a series of circle center connecting lines, center connecting lines and included angles, so that the accurate aperture, hole spacing and hole deviation of the double spiral hole rod can be obtained. For the hole symmetry of the three-spiral hole rod, the hole symmetry is measured by an included angle method, and the hole shape and size are detected more comprehensively. The hole deviation of the double-spiral hole rod and the hole symmetry of the three-spiral hole rod are critical sizes, and the method has important significance for subsequent guidance of blank production of products and grinding and edging after sintering. 2) The method is simple and quick to operate, is suitable for production detection of a large number of products, is novel and unique in measurement method, and has an obvious effect of guiding production of the inner-cooling spiral hole rod products.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a hard alloy spiral hole rod;
FIG. 2 is a simplified schematic of the method of the present invention;
FIG. 3 is a schematic view showing the end face structure of a double-spiral holed rod in example 1;
FIG. 4 is a schematic view showing the pore diameter measurement of a double-spiral-hole rod in example 1;
FIG. 5 is a schematic view showing the hole pitch detection of a double-screw-hole rod in example 1;
FIG. 6 is a schematic diagram illustrating the eccentricity detection of the double-screw rod in example 1;
FIG. 7 is a schematic view showing the end face structure of a triple-helical perforated rod in example 2;
FIG. 8 is a schematic view of pore diameter detection of a triple-helical-hole rod in example 2;
FIG. 9 is a schematic view of the detection of the hole pitch of a triple-helical-hole rod in example 2;
FIG. 10 is a schematic diagram of the symmetry detection of three-screw-hole rod in example 2.
Detailed Description
The schematic diagram of the internal structure of the cemented carbide spiral hole rod is shown in figure 1.
Example 1
A specific test model of this example was a double spiral perforated rod B.PHI.10.3 X.2 PHI.1.4 X.4.8 X.330B.
Horizontally placing the double-spiral hole rod on a detection table, wherein the end face of the double-spiral hole rod is right opposite to a right-angle prism (the included angle between the right-angle prism and the detection table is 45 degrees), an objective lens is arranged right above the right-angle prism, and the objective lens is connected with a computer through a data line; the specific placement can be seen in fig. 2.
The end face of the hole rod is projected on an objective lens in equal proportion through a right-angle prism, the objective lens transmits data to a screen of a computer, a schematic diagram of the end face structure of the double-spiral hole rod is obtained and is shown in figure 3, 5 points are uniformly selected on the contour line of an inner hole on a displayed graph and are shown in figure 4, then 2 inner hole circles are drawn through a 5-point circle drawing method, then the diameter of the inner hole circle is directly read out on the computer, and data can be shown in table 1;
the centers of the two inner hole circles are determined by the drawn inner hole circles, the centers of the two inner hole circles are connected as shown in fig. 5, the length of a line segment between the two centers of the circles is read, and the data can be seen in table 1, namely the hole spacing. And further determining the midpoint N of a connecting line of the centers of the two inner holes.
Uniformly drawing 5 points along the root circle of the excircle of the bar product to obtain the excircle of the bar, determining the circle center of the excircle of the bar as M, connecting the circle center M with the midpoint N of the connection line of the circle centers of the two inner holes to obtain a line segment MN (shown in figure 6), reading the length of the line segment MN, namely the length of the line segment MN is the eccentric distance of the double-spiral-hole bar hole, and specific data can be shown in a table 1.
TABLE 1
| Bar specification (30 degree double helix hole bar) | Hole spacing, mm | Eccentricity, mm | Pore diameter, mm |
| BΦ10.3×2Φ1.4×4.8×330B | 4.658 | 0.101 | 1.402/1.411 |
Example 2
The specific test model of this example is a three-helix perforated rod of B Φ 10.3 × 3 Φ 0.85 × 5.1 × 330B,
the three-spiral hole rod is horizontally placed on the detection table, the end face of the three-spiral hole rod is right opposite to the right-angle prism (the included angle between the right-angle prism and the detection table is 45 degrees), the objective lens is arranged right above the right-angle prism, and the objective lens is connected with a computer through a data line.
Testing the three-spiral hole rod, projecting the end face of the hole rod on an objective lens in equal proportion through a right-angle prism, transmitting the objective lens to a screen of a computer through data transmission to obtain a schematic diagram of the end face structure of the three-spiral hole rod, as shown in fig. 7, uniformly selecting 5 points on a contour line of an inner hole on a displayed graph, as shown in fig. 8, drawing 3 inner hole circles through a 5-point circle drawing method, and directly reading the diameter of the inner hole circle on the computer, wherein the data can be shown in a table 2;
the centers of three inner hole circles are determined through the drawn inner hole circles, 3 points of the centers of the 3 inner holes are used for drawing circles, as shown in fig. 9, a circle with the center of N is obtained, the diameter of the circle is read, the hole distance is obtained, and data can be shown in a table 2.
Uniformly drawing 5 points along the excircle tooth root circle of a bar product to obtain the excircle of the bar, determining the circle center of the excircle of the bar as M, connecting the circle center M with the centers of three inner holes to obtain three lines taking the circle center as M as an end point, sequentially measuring adjacent included angles of 3 straight lines, namely the hole symmetry size of the three-hole bar, and displaying data in a table 2.
TABLE 2
| Bar specification (30 degree three spiral hole bar) | Hole spacing, mm | Hole included angle | Pore diameter, mm |
| BΦ10.3×3Φ0.85×5.1*330B | 5.058 | 119.2°/121.8°/119.0° | 0.823/0.811/0.815 |
Claims (6)
1. A method for measuring the size of an inner hole of a hard alloy bar comprises the following steps:
1) horizontally placing a hard alloy bar to be detected on a detection table, wherein the end face of the bar is right opposite to a right-angle prism, and an objective lens is arranged right above the right-angle prism and is connected with a computer through a data line;
2) during testing, the end face of the bar is projected onto the objective lens in an equal proportion through the right-angle prism, the objective lens is displayed on a computer screen through data transmission, 5 points are uniformly selected along the edge of the inner hole according to the end face of the bar on the computer screen, a graph of the inner hole is obtained according to a method of drawing a circle by the 5 points, and the diameter of the inner hole is directly read.
2. The method for measuring the size of the inner hole of the hard alloy bar according to claim 1, wherein in the step 1), the included angle between the right-angle prism and the detection table is 45 degrees0。
3. The method for measuring the size of the inner hole of the hard alloy bar according to claim 1, wherein in the step 2), when the hard alloy bar is a double-hole bar, two inner holes are drawn, then the centers of the inner holes are connected, and the length of the line segment is the size of the hole spacing.
4. The method for measuring the size of the inner hole of the hard alloy bar according to claim 3, wherein in the step 2), a circle is drawn uniformly at 5 points along the root circle of the excircle of the bar product to obtain the excircle of the bar, the circle center M of the excircle of the bar is further determined, the circle center M of the excircle of the bar is connected with the midpoint N of a connecting line of the circle center M of the excircle of the bar and the hole spacing, and the length of the obtained line segment MN is the eccentricity of the double-hole bar.
5. The method for measuring the size of the inner hole of the hard alloy bar according to claim 1, wherein in the step 2), when the hard alloy bar is a three-hole bar, a graph of 3 inner holes is obtained by a 5-point circle drawing method, the center of the graph is determined, then the centers of 3 holes are sequentially clicked to draw a circle at 3 points, and the diameter size of the drawn circle is directly read as the hole pitch size.
6. The method for measuring the size of the inner hole of the hard alloy bar according to claim 5, wherein 5 points of circle drawing is performed uniformly on the root circle of the excircle of the bar product to obtain the excircle of the bar, the circle center M of the excircle of the bar is further determined, then the circle center M of the bar is sequentially connected with 3 inner hole circle centers to form 3 straight lines, and the adjacent included angles of the 3 straight lines are sequentially measured to obtain the hole symmetry size of the three-hole bar.
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| CN111829443A (en) * | 2020-06-04 | 2020-10-27 | 广州奥鑫通讯设备有限公司 | Optical fiber spacing measuring system and measuring method thereof |
| CN112764394A (en) * | 2020-12-29 | 2021-05-07 | 上海维宏电子科技股份有限公司 | Method, equipment, device, processor and storage medium for realizing speed-limiting control for workpiece machining track in numerical control system |
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2022
- 2022-03-11 CN CN202210234947.3A patent/CN114526681A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2854510Y (en) * | 2005-08-30 | 2007-01-03 | 河北德强冶金材料科技有限公司 | Portable hot-rolled steel rod on-line detector and its optical signal conduction device |
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| CN102061517A (en) * | 2010-12-13 | 2011-05-18 | 浙江长兴众成电子有限公司 | Czochralski single crystal silicon diameter measurement method |
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Application publication date: 20220524 |