CN110645877A - Internal thread pitch diameter detection device - Google Patents
Internal thread pitch diameter detection device Download PDFInfo
- Publication number
- CN110645877A CN110645877A CN201911132998.XA CN201911132998A CN110645877A CN 110645877 A CN110645877 A CN 110645877A CN 201911132998 A CN201911132998 A CN 201911132998A CN 110645877 A CN110645877 A CN 110645877A
- Authority
- CN
- China
- Prior art keywords
- micrometer
- internal thread
- pitch diameter
- seat body
- detection device
- 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.)
- Pending
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
Abstract
The invention discloses an internal thread pitch diameter detection device, which comprises: a micrometer; the micrometer anvil measuring rod is arranged on the micrometer; the first end of the seat body is connected with the micrometer anvil rod; the ball is connected with the second end of pedestal, and the ball can contact with the internal thread tooth, can accurately conveniently detect the internal thread pitch diameter.
Description
Technical Field
The invention belongs to the technical field of automobile part manufacturing, and particularly relates to an internal thread pitch diameter detection device.
Background
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
in the machining fields of automobile parts, mold manufacturing, mechanical transmission and the like, a measurement problem is not solved, and the detection of the pitch diameter of the related internal thread is a difficult problem. Because the pitch diameter of the internal thread is not easy or can not be directly measured, certain difficulty is brought to processing and detection in actual production.
Disclosure of Invention
The invention aims to solve the technical problem of providing an internal thread pitch diameter detection device capable of accurately and conveniently detecting the pitch diameter of an internal thread.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an internal thread pitch diameter detection device is provided with:
a micrometer;
the micrometer anvil measuring rod is arranged on the micrometer section;
the first end of the seat body is connected with the micrometer anvil rod;
the ball is connected with the second end of the seat body and can be contacted with the thread of the internal thread;
from the geometric analysis, S ═ D (in D-D)/2 + a, i.e., D +2a-2S in D, and a ═ a-D/2+ D/2 × 1/sin (α/2) -1/4 × t ctg (α/2), the pitch diameter D of the threadInVaries with S only; wherein D is the diameter of the workpiece, A is the height of the measuring seat, S is the distance from the end surface of the seat body to the outer diameter of the workpiece to be measured, D is the diameter of the steel ball, D is the pitch diameter of the thread, t is the thread pitch, alpha is the thread profile angle, and a is the distance from the end surface of the measuring seat to the pitch diameter of the thread.
The micrometer caliper further comprises a guide sleeve, wherein the first end of the guide sleeve is connected with the micrometer anvil rod, and the second end of the guide sleeve is connected with the first end of the seat body.
And the inner hole of the guide sleeve is in clearance fit with the measuring anvil rod of the micrometer.
The seat body is arranged at the hole bottom of the inner hole of the guide sleeve; the micrometer anvil rod is contacted with the seat body.
One of the technical scheme has the following advantages or beneficial effects, and the internal thread pitch diameter can be accurately and conveniently detected.
Drawings
Fig. 1 is a schematic structural diagram of an internal thread pitch diameter detection device provided in an embodiment of the present invention;
the labels in the above figures are: 1. the method comprises the following steps of machining a workpiece, 2, a micrometer, 3, a steel ball, 4, a seat body, 5, a guide sleeve, 6, a micrometer anvil measuring rod, D, the diameter of the workpiece, A, the height of a measuring seat, S, the distance from the end face of the seat body to the outer diameter of the workpiece 1, D, the diameter of the steel ball, DInThe pitch, the angle alpha, the thread profile angle and the distance from the end face of the measuring seat to the pitch diameter line of the thread.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, an internal thread pitch diameter detection device includes:
a micrometer;
the micrometer anvil measuring rod is arranged on the micrometer;
the first end of the seat body is connected with the micrometer anvil rod;
the ball is connected with the second end of the seat body and can be contacted with the thread of the internal thread.
The first end of the guide sleeve is connected with the measuring anvil rod of the micrometer, and the second end of the guide sleeve is connected with the first end of the seat body.
The inner hole of the guide sleeve is in clearance fit with the measuring anvil rod of the micrometer.
The seat body is arranged at the hole bottom of the inner hole of the guide sleeve; the anvil measuring rod of the micrometer contacts with the seat body.
On the basis of a common micrometer, a special measuring seat and a guide sleeve are added for use. The measuring seat is formed by welding steel balls and a seat body, and the inner hole of the guide sleeve is in high-precision clearance fit with the measuring anvil rod of the micrometer. The detection device has the advantages of simple structure, convenient use and accurate measurement.
The inner hole of the guide sleeve is in clearance fit with the measuring anvil rod of the micrometer in high precision, and a measuring seat (formed by welding a steel ball and a seat body) is arranged on the guide sleeve. Calculated by geometric analysis, S ═ D (D-D)In) 2+ a, i.e. dInD +2a-2S, a-D/2+ D/2 x 1/sin (α/2) -1/4 x t ctg (α/2), a is also a constant value because the height a of the measuring seat, the diameter D of the steel ball and the thread form angle α are all constants, and the diameter D of the workpiece is also a constant value, i.e., the diameter D of the middle thread varies with S only, so that the change in the diameter D of the middle thread can be detected at any time by using a micrometer to detect the dimension S from the end surface of the seat body 4 to the outer diameter of the workpiece 1 during machining. Before measurement, the zero position can be adjusted according to the calibration method of the micrometer, so that the measurement accuracy is high.
After adopting foretell structure, can accurate convenient internal thread pitch diameter that detects.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (4)
1. An internal thread pitch diameter detection device is characterized by comprising:
a micrometer;
the micrometer anvil measuring rod is arranged on the micrometer section;
the first end of the seat body is connected with the micrometer anvil rod;
the ball is connected with the second end of the seat body and can be contacted with the thread of the internal thread;
calculated by geometric analysis, S ═ D (D-D)In) 2+ a, i.e. dInD +2a-2S, and a-D/2+ D/2 x 1/sin (α/2) -1/4 x t ctg (α/2), pitch diameter DInVaries with S only; wherein D is the diameter of the workpiece, A is the height of the measuring seat, S is the distance from the end surface of the seat body to the outer diameter of the workpiece to be measured, D is the diameter of the steel ball, DInIs the pitch diameter of the thread, t is the thread pitch, alpha is the thread profile angle, and a is the distance from the end face of the measuring seat to the pitch diameter of the thread.
2. The internal thread pitch diameter detection device of claim 1, further comprising a guide sleeve, wherein a first end of the guide sleeve is connected with the micrometer anvil rod, and a second end of the guide sleeve is connected with the first end of the seat body.
3. The internal thread pitch diameter detection device of claim 2, wherein the guide sleeve inner hole is in clearance fit with the micrometer anvil rod.
4. The internal thread pitch diameter detection device of claim 3, wherein the seat body is arranged at the bottom of the inner hole of the guide sleeve; the micrometer anvil rod is contacted with the seat body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132998.XA CN110645877A (en) | 2019-11-19 | 2019-11-19 | Internal thread pitch diameter detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132998.XA CN110645877A (en) | 2019-11-19 | 2019-11-19 | Internal thread pitch diameter detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110645877A true CN110645877A (en) | 2020-01-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911132998.XA Pending CN110645877A (en) | 2019-11-19 | 2019-11-19 | Internal thread pitch diameter detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110645877A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879505A (en) * | 2020-07-08 | 2020-11-03 | 常州海通石油管业有限公司 | Oil pipe thread detection device for high-pressure oil-gas well operation |
-
2019
- 2019-11-19 CN CN201911132998.XA patent/CN110645877A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879505A (en) * | 2020-07-08 | 2020-11-03 | 常州海通石油管业有限公司 | Oil pipe thread detection device for high-pressure oil-gas well operation |
| CN111879505B (en) * | 2020-07-08 | 2022-02-08 | 常州海通石油管业有限公司 | Oil pipe thread detection device for high-pressure oil-gas well operation |
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