CN105222703A - The method of screw thread simple pitch diameter measured by a kind of microscope - Google Patents
The method of screw thread simple pitch diameter measured by a kind of microscope Download PDFInfo
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- CN105222703A CN105222703A CN201510641818.6A CN201510641818A CN105222703A CN 105222703 A CN105222703 A CN 105222703A CN 201510641818 A CN201510641818 A CN 201510641818A CN 105222703 A CN105222703 A CN 105222703A
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- screw thread
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- pitch diameter
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Abstract
The present invention relates to a kind of method that screw thread simple pitch diameter measured by microscope, comprise the following steps: under screw thread to be measured is positioned over microscope by (1), adjust microscope until clear picture, the screw thread of leveling simultaneously; (2) gathered the image of screw thread to be measured by microscope, and this image is imported to automatic mapping software, described image comprises at least 2 tooth side lines of screw thread side to be measured and at least 4 tooth side lines of screw thread opposite side to be measured; (3) by the image of automatic mapping software process screw thread to be measured, and the simple pitch diameter of screw thread to be measured is calculated according to Three-ball method.Gathered the image of screw thread to be measured by microscope, and the image of screw thread to be measured imported in automatic mapping software, in automatic mapping software, simulate that principle that Three-ball method measures screw thread simple pitch diameter carries out mapping, dimensioning and result of calculation.Present invention achieves the non-contact measurement of screw thread simple pitch diameter, the simple pitch diameter that path increases the unconventional screw thread such as screw thread and brachymemma screw thread can be measured exactly.
Description
Technical field
The present invention relates to a kind of method that screw thread simple pitch diameter measured by microscope.
Background technology
At present, the conventional method measuring screw thread simple pitch diameter is Three-ball method, and this method is fast accurate, and measuring accuracy is high.Measuring the pitch diameter of thread with Three-ball method is be placed in the alveolus on detected screw thread both sides respectively by metering pin identical for three diameters, as shown in Figure 1.The span M between three metering pin buses is measured, according to pitch p, half of thread angle with measurement instrument
and metering pin diameter d
0calculate the simple pitch diameter of screw thread
for STRTHD
then there is d
2s=M-3d
0+ 0.866p; For acme thread
then there is d
2s=M-4.864d
0+ 1.866p.
But because path increases meeting at the bottom of the tooth of screw thread and three pins generation interference, and the tooth side of brachymemma screw thread normally cannot contact with three pins; Thus, the unconventional screw thread such as screw thread and brachymemma screw thread is increased for path, Three-ball method cannot be used to carry out the measurement of screw thread simple pitch diameter.
Summary of the invention
The object of this invention is to provide a kind of method that screw thread simple pitch diameter measured by microscope, in order to solve the problem that the pitch diameter of thread of the prior art measurement Three-ball method cannot be measured unconventional screw thread.
For achieving the above object, the solution of the present invention comprises:
A method for screw thread simple pitch diameter measured by microscope, comprises the following steps:
(1) under screw thread to be measured being positioned over microscope, microscope is adjusted until clear picture, the screw thread of leveling simultaneously;
(2) gathered the image of screw thread to be measured by microscope, and this image is imported to automatic mapping software, described image comprises at least 2 tooth side lines of screw thread side to be measured and at least 4 tooth side lines of screw thread opposite side to be measured;
(3) by the image of automatic mapping software process screw thread to be measured, and the simple pitch diameter of screw thread to be measured is calculated according to Three-ball method.
In described step (2), the image of the screw thread to be measured of microscope collection is 2 tooth side lines of screw thread side to be measured and 4 tooth side lines of screw thread opposite side to be measured.
Described microscope is JX13C microscope.
Described automatic mapping software is autoCAD.
The invention has the beneficial effects as follows: the image being gathered screw thread to be measured by microscope, and the image of screw thread to be measured is imported in automatic mapping software, in automatic mapping software, simulate that principle that Three-ball method measures screw thread simple pitch diameter carries out mapping, dimensioning and result of calculation.Present invention achieves the non-contact measurement of screw thread simple pitch diameter, the simple pitch diameter that path increases the unconventional screw thread such as screw thread and brachymemma screw thread can be measured exactly.
Accompanying drawing explanation
Fig. 1 is that Three-ball method of the prior art measures pitch diameter of thread schematic diagram;
Fig. 2 is the process flow diagram of the embodiment of the present invention;
Fig. 3 is schematic diagram half side on the screw thread to be measured of the embodiment of the present invention;
Fig. 4 is schematic diagram half side under the screw thread to be measured of the embodiment of the present invention;
Fig. 5 is 6 tooth side line schematic diagram that the microscope of the embodiment of the present invention gathers;
Fig. 6 is the autoCAD process figure of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
The method employing contactless measurement of screw thread simple pitch diameter measured by the microscope of the embodiment of the present invention, as shown in Figure 2, comprises the following steps:
(1) under screw thread to be measured being positioned over microscope, adjusting focal length and lead angle until clear picture, leveling screw thread.
Under screw thread to be measured is positioned over JX13C microscope, adjusting focal length and lead angle until clear picture, meanwhile, leveling screw thread.
JX13C microscope belongs to universal tool-measuring microscope, adopts precise grating system as measuring sensor, has the many merits such as thermal value is low, anticorrosive, anti-pollution, vibration strength are good; And with powerful image processing software, complicated surveying work can be completed; Software adopts digital image technology, automatic contour identification border, reduces personal error, improves operating efficiency; With digital display circular dividing table and height measuring device, angle and highly all digital display, directly perceived, convenient; Lighting device adopts LED cold light source entirely, and thermal value is low, long service life.
(2) gathered the image of screw thread to be measured by microscope, and this image is imported to automatic mapping software.
2 tooth side lines are gathered in the side of screw thread to be measured, as shown in Figure 3 by JX13C microscope; Gather 4 tooth side lines at the opposite side of screw thread to be measured, as shown in Figure 4, amount to 6 tooth side lines.Then these 6 tooth side lines are imported in autoCAD software, as shown in Figure 5.
(3) by the image of automatic mapping software process screw thread to be measured, and the simple pitch diameter of screw thread to be measured is calculated according to Three-ball method.
In autoCAD, make the tangent circle of adjacent two straight lines respectively, diameter of a circle is the three pin diameters that tested screw thread should be selected, and then makes the center of circle line of two circles below, marks out the vertical range L value to two round heart lines below of the center of circle above, as shown in Figure 6.The principle measuring screw thread simple pitch diameter by simulation Three-ball method in autoCAD carries out mapping, dimensioning and result of calculation.
In the above-described embodiments, in described step (2), gather 2 tooth side lines by microscope in screw thread side, gather 4 tooth side lines in the side of screw thread, altogether gather 6 tooth side lines.As other embodiments, in described step (2), pass through microscope Direct Recognition thread contour to be measured and synthetic image.
In the above-described embodiments, the microscope of employing is JX13C universal tool-measuring microscope; As other embodiments, microscope adopts the universal tool-measuring microscope of other types.
In the above-described embodiments, described automatic mapping software is autoCAD software; As other embodiments, described automatic mapping software can adopt the mapping software of the other types such as CorelDRAW.
Claims (4)
1. a method for screw thread simple pitch diameter measured by microscope, it is characterized in that: comprise the following steps:
(1) under screw thread to be measured being positioned over microscope, microscope is adjusted until clear picture, the screw thread of leveling simultaneously;
(2) gathered the image of screw thread to be measured by microscope, and this image is imported to automatic mapping software, described image comprises at least 2 tooth side lines of screw thread side to be measured and at least 4 tooth side lines of screw thread opposite side to be measured;
(3) by the image of automatic mapping software process screw thread to be measured, and the simple pitch diameter of screw thread to be measured is calculated according to Three-ball method.
2. the method for screw thread simple pitch diameter measured by microscope according to claim 1, it is characterized in that: in described step (2), the image of the screw thread to be measured of microscope collection is 2 tooth side lines of screw thread side to be measured and 4 tooth side lines of screw thread opposite side to be measured.
3. the method for screw thread simple pitch diameter measured by microscope according to claim 1, it is characterized in that: described microscope is JX13C microscope.
4. the method for screw thread simple pitch diameter measured by microscope according to claim 1, it is characterized in that: described automatic mapping software is autoCAD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641818.6A CN105222703A (en) | 2015-09-30 | 2015-09-30 | The method of screw thread simple pitch diameter measured by a kind of microscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641818.6A CN105222703A (en) | 2015-09-30 | 2015-09-30 | The method of screw thread simple pitch diameter measured by a kind of microscope |
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|---|---|
| CN105222703A true CN105222703A (en) | 2016-01-06 |
Family
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|---|---|---|---|
| CN201510641818.6A Pending CN105222703A (en) | 2015-09-30 | 2015-09-30 | The method of screw thread simple pitch diameter measured by a kind of microscope |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592809A (en) * | 2018-07-19 | 2018-09-28 | 中国北方车辆研究所 | Tap with odd slots screw thread simple pitch diameter measurement method based on arc eyepiece |
Citations (6)
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|---|---|---|---|---|
| EP0404544A2 (en) * | 1989-06-21 | 1990-12-27 | Shin-Etsu Handotai Company Limited | Non-contact type automatic multi-point diameter measurement apparatus |
| JP2000146532A (en) * | 1998-11-05 | 2000-05-26 | Mitaka Koki Co Ltd | Non-contact measuring method for dimension by automatic focus of laser |
| CN102735182A (en) * | 2011-04-15 | 2012-10-17 | 顾建达 | Method and device for scanning inner contour of buildings by using handheld rangefinder |
| CN103322935A (en) * | 2013-06-09 | 2013-09-25 | 复旦大学附属金山医院 | Spectacle frame wearing deformation displacement measuring device and measuring method thereof |
| CN104864806A (en) * | 2014-02-24 | 2015-08-26 | 顺富科技实业有限公司 | Stereo-space measuring instrument and space measuring method thereof |
| CN104880156A (en) * | 2015-06-05 | 2015-09-02 | 贵州航天精工制造有限公司 | Method for measuring large R value by using CAD technology |
-
2015
- 2015-09-30 CN CN201510641818.6A patent/CN105222703A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0404544A2 (en) * | 1989-06-21 | 1990-12-27 | Shin-Etsu Handotai Company Limited | Non-contact type automatic multi-point diameter measurement apparatus |
| JP2000146532A (en) * | 1998-11-05 | 2000-05-26 | Mitaka Koki Co Ltd | Non-contact measuring method for dimension by automatic focus of laser |
| CN102735182A (en) * | 2011-04-15 | 2012-10-17 | 顾建达 | Method and device for scanning inner contour of buildings by using handheld rangefinder |
| CN103322935A (en) * | 2013-06-09 | 2013-09-25 | 复旦大学附属金山医院 | Spectacle frame wearing deformation displacement measuring device and measuring method thereof |
| CN104864806A (en) * | 2014-02-24 | 2015-08-26 | 顺富科技实业有限公司 | Stereo-space measuring instrument and space measuring method thereof |
| CN104880156A (en) * | 2015-06-05 | 2015-09-02 | 贵州航天精工制造有限公司 | Method for measuring large R value by using CAD technology |
Non-Patent Citations (1)
| Title |
|---|
| 刘兴富: "不用三针的"三针测量"方法", 《上海计量测量》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592809A (en) * | 2018-07-19 | 2018-09-28 | 中国北方车辆研究所 | Tap with odd slots screw thread simple pitch diameter measurement method based on arc eyepiece |
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Application publication date: 20160106 |