CN110631538A - Measuring method for perpendicularity of end face - Google Patents
Measuring method for perpendicularity of end face Download PDFInfo
- Publication number
- CN110631538A CN110631538A CN201910940726.6A CN201910940726A CN110631538A CN 110631538 A CN110631538 A CN 110631538A CN 201910940726 A CN201910940726 A CN 201910940726A CN 110631538 A CN110631538 A CN 110631538A
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- CN
- China
- Prior art keywords
- probe
- measuring
- thread
- pitch diameter
- threads
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- 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
- G01B21/22—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 angles or tapers; for testing the alignment of axes
Abstract
The invention discloses a method for measuring the perpendicularity of an end face, which comprises the following steps: and the measuring probe extends into the thread profile, and the probe acquires data after detecting that the probe is contacted with the thread profiles on the two sides of the thread. Each circle of threads are respectively collected at one point in four directions of south, east, west and north, four points are collected, at least 6 circles of threads are collected, the pitch diameter of the threads is fitted, and a reference is established; measuring and fitting the three-coordinate probe one by one to obtain a bolt polish rod model and a bolt supporting surface end face model; and taking the pitch diameter fitted in the front face as a reference, and measuring the picking of the light-emitting rod to the pitch diameter and the perpendicularity of the support face to the pitch diameter. The invention adopts a contact type measuring mode, and has small measuring error.
Description
Technical Field
The invention belongs to the technical field of detection, and particularly relates to a method for measuring the perpendicularity of an end face.
Background
The precision bolt is widely applied to an aeroengine, and in order to ensure the reliability of bolt installation, the runout of a bolt polish rod is usually measured by taking the pitch diameter of the thread as a reference, but the pitch diameter of the thread is not a solid line segment but a virtual line segment. The measuring mode in production adopts a mode of converting reference, the major diameter of the thread is used as a medium diameter to replace reference, or a coaxiality ring gauge is used for measuring form and position tolerance. However, the two methods have the greatest disadvantage of poor measurement accuracy, and cannot meet the measurement requirements of high-precision bolts. The reason is that the major diameter of the thread formed by rolling is naturally formed by material flowing, the tolerance of jumping and roundness of the thread is large, the measurement error is large, and the jumping value of the bolt polish rod to the pitch diameter of the thread cannot be truly reflected due to reference conversion. The coaxiality ring gauge measurement mode is greatly influenced by the manufacturing precision. And a gap exists between the ring gauge and the precision bolt when the ring gauge is matched with the precision bolt, so that the measurement error is increased. The requirement of measuring the form and position tolerance of the high-precision bolt cannot be met.
Disclosure of Invention
The invention aims to overcome the defects and provide a method for measuring the light bar runout and the end face verticality of a high-precision bolt by using a contact type measuring mode and small measuring errors by taking the pitch diameter of a thread as a reference.
The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:
the invention relates to a method for measuring the perpendicularity of an end face, which comprises the following steps:
(1) selecting a matched probe according to the thread pitch, and confirming the diameter of the probe according to a three-pin measurement method, namely;
d=0.577P
d-Probe diameter
P-pitch of thread
(2) Mounting a measured bolt on a three-coordinate mounting table;
(3) and the measuring probe extends into the thread profile, and when the probe is detected to be in contact with the thread profiles on the two sides of the thread, the probe acquires data.
(4) Each circle of threads are respectively collected at one point in four directions of south, east, west and north, four points are collected, at least 6 circles of threads are collected, the pitch diameter of the threads is fitted, and a reference is established;
(5) measuring and fitting the three-coordinate probe one by one to obtain a bolt polish rod model and a bolt supporting surface end face model;
(6) and measuring the jumping of the light emitting rod to the pitch diameter and the verticality of the support surface to the pitch diameter by taking the pitch diameter fitted in the front surface as a reference.
Compared with the prior art, the invention has obvious beneficial effects, and the technical scheme can show that: according to the invention, a matched probe is selected according to the thread pitch, and the diameter confirmation of the probe is carried out according to a three-pin measurement method (see figure 1);
namely;
d=0.577P
d-Probe diameter
P-pitch of thread
The measuring probe extends into the thread profile and acquires data when it is detected that the probe has contacted the thread profile on both sides (see figure 2). Each circle of threads are respectively collected at one point in four directions of south, east, west and north, four points are collected, at least 6 circles of threads are collected, the pitch diameter of the threads is fitted, and a reference is established; measuring and fitting the three-coordinate probe one by one to obtain a bolt polish rod model and a bolt supporting surface end face model; and taking the pitch diameter fitted in the front face as a reference, and measuring the picking of the light-emitting rod to the pitch diameter and the perpendicularity of the support face to the pitch diameter. The adoption of a contact measurement mode is realized, and the measurement error is small.
Drawings
FIG. 1 is a view of the measuring installation position of the present invention;
fig. 2 is an enlarged view of fig. 1A.
Marked in the figure;
1. screw thread, 2, probe, 3, bolt, 4, location mesa.
Detailed Description
The invention relates to a method for measuring the perpendicularity of an end face, which comprises the following steps:
(1) selecting a matched probe according to the thread pitch, and confirming the diameter of the probe according to a three-pin measurement method, namely;
d=0.577P
d-Probe diameter
P-pitch of thread
(2) Mounting a measured bolt on a three-coordinate mounting table (see fig. 1);
(3) the measuring probe extends into the thread profile (see fig. 2) and collects data when it is detected that the probe has contacted the thread profile on both sides of the thread.
(4) Each circle of threads are respectively collected at one point in four directions of south, east, west and north, four points are collected, at least 6 circles of threads are collected, the pitch diameter of the threads is fitted, and a reference is established;
(5) measuring and fitting the three-coordinate probe one by one to obtain a bolt polish rod model and a bolt supporting surface end face model;
(6) and measuring the jumping of the light emitting rod to the pitch diameter and the verticality of the support surface to the pitch diameter by taking the pitch diameter fitted in the front surface as a reference.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.
Claims (1)
1. A method for measuring the perpendicularity of an end face comprises the following steps:
(1) selecting a probe according to the thread pitch, and performing probe diameter confirmation according to a three-pin measurement method, namely;
d=0.577P
d-Probe diameter
P-pitch of thread
(2) Mounting a measured bolt on a three-coordinate mounting table;
(3) the measuring probe extends into the thread profile, and when the probe is detected to be in contact with the thread profiles on the two sides of the thread, the probe acquires data;
(4) each circle of threads are respectively collected at one point in four directions of south, east, west and north, four points are collected, at least 6 circles of threads are collected, the pitch diameter of the threads is fitted, and a reference is established;
(5) measuring and fitting the three-coordinate probe one by one to obtain a bolt polish rod model and a bolt supporting surface end face model;
(6) and measuring the jumping of the light emitting rod to the pitch diameter and the verticality of the support surface to the pitch diameter by taking the pitch diameter fitted in the front surface as a reference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910940726.6A CN110631538A (en) | 2019-09-30 | 2019-09-30 | Measuring method for perpendicularity of end face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910940726.6A CN110631538A (en) | 2019-09-30 | 2019-09-30 | Measuring method for perpendicularity of end face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110631538A true CN110631538A (en) | 2019-12-31 |
Family
ID=68974837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910940726.6A Pending CN110631538A (en) | 2019-09-30 | 2019-09-30 | Measuring method for perpendicularity of end face |
Country Status (1)
| Country | Link |
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| CN (1) | CN110631538A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS552980A (en) * | 1978-06-23 | 1980-01-10 | Takayuki Kodama | Rule for stairway side plate |
| JP2001272215A (en) * | 2000-03-23 | 2001-10-05 | Niigata Eng Co Ltd | Measuring method of screw, apparatus therefor and determining apparatus for propriety of shape of screw |
| CN102221349A (en) * | 2011-04-01 | 2011-10-19 | 浙江大学宁波理工学院 | Method for eliminating error of cylinder screw thread non-contact measurement |
| CN103615960A (en) * | 2013-12-16 | 2014-03-05 | 南车戚墅堰机车车辆工艺研究所有限公司 | External thread coaxiality measuring device and measuring method |
| CN104457608A (en) * | 2013-09-16 | 2015-03-25 | 上海航天精密机械研究所 | Cylinder size error detection system |
| CN107167078A (en) * | 2017-05-23 | 2017-09-15 | 扬州大学 | A kind of multiple degrees of freedom laser displacement sensor system and spiral bevel gear measuring method |
| CN105043200B (en) * | 2015-09-09 | 2017-10-31 | 广西玉柴机器股份有限公司 | The pulsation measurement device of bolt |
| CN108592795A (en) * | 2018-06-06 | 2018-09-28 | 中国计量科学研究院 | A kind of thread parameter measurement device based on spectral confocal sensor |
-
2019
- 2019-09-30 CN CN201910940726.6A patent/CN110631538A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS552980A (en) * | 1978-06-23 | 1980-01-10 | Takayuki Kodama | Rule for stairway side plate |
| JP2001272215A (en) * | 2000-03-23 | 2001-10-05 | Niigata Eng Co Ltd | Measuring method of screw, apparatus therefor and determining apparatus for propriety of shape of screw |
| CN102221349A (en) * | 2011-04-01 | 2011-10-19 | 浙江大学宁波理工学院 | Method for eliminating error of cylinder screw thread non-contact measurement |
| CN104457608A (en) * | 2013-09-16 | 2015-03-25 | 上海航天精密机械研究所 | Cylinder size error detection system |
| CN103615960A (en) * | 2013-12-16 | 2014-03-05 | 南车戚墅堰机车车辆工艺研究所有限公司 | External thread coaxiality measuring device and measuring method |
| CN105043200B (en) * | 2015-09-09 | 2017-10-31 | 广西玉柴机器股份有限公司 | The pulsation measurement device of bolt |
| CN107167078A (en) * | 2017-05-23 | 2017-09-15 | 扬州大学 | A kind of multiple degrees of freedom laser displacement sensor system and spiral bevel gear measuring method |
| CN108592795A (en) * | 2018-06-06 | 2018-09-28 | 中国计量科学研究院 | A kind of thread parameter measurement device based on spectral confocal sensor |
Non-Patent Citations (1)
| Title |
|---|
| 王庆广等: "三坐标测量机测量外螺纹螺距和中径的方法", 《计量技术》 * |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Chang Inventor after: Sui Tianlong Inventor after: Wu Qiang Inventor before: Sui Tianlong Inventor before: Wu Qiang |
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| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191231 |
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| RJ01 | Rejection of invention patent application after publication |