CN105004313B - A kind of measuring method of tube bending elongation - Google Patents
A kind of measuring method of tube bending elongation Download PDFInfo
- Publication number
- CN105004313B CN105004313B CN201510380224.4A CN201510380224A CN105004313B CN 105004313 B CN105004313 B CN 105004313B CN 201510380224 A CN201510380224 A CN 201510380224A CN 105004313 B CN105004313 B CN 105004313B
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- point
- length
- straight
- bend pipe
- elongation
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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
- G01B21/32—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 the deformation in a solid
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses the measuring method of tube bending elongation, its can direct measurement gone out tube bending processing first section elongation and endpiece elongation, when tube bending is processed, it can be very good to determine pipe range and inflection point, so as to ensure the precision of bend pipe processing well, the processing of bend pipe can be accurately instructed.
Description
Technical field
The present invention relates to e measurement technology, particularly a kind of measuring method of tube bending elongation.
Background technology
In ship pipeline process, in order to ensure bend pipe machining accuracy, it is necessary to measure that pipeline is after bending to be prolonged in advance
The amount of stretching.At present, the measuring method of pipeline bending elongation is as follows：The length L of the first accurately measure pipe to be curved before bend pipe,
After brake forming, then pipe after bending is placed on platform, measures arc length α, the straight line segment length at two point of contacts to end points of bent angle
S1、S2；α+S1+ S2-L are obtained into elongation.
Above-mentioned measuring method, it is thus necessary to determine that the arc length of point of contact and bending section, the determination at its point of contact is difficult to accurately, and measures
Arc length numerical value be also difficult to accurately, therefore measured extension accuracy of measurement is not high.In addition, its elongation measured is whole pipeline
Elongation, and the elongation before inflection point can not be measured（First section elongation）The only elongation after curved point（Endpiece extends
Amount）, the directive significance to processing is strong.Operating personnel can not accurately determine the starting point of bending operation, operating personnel according to it
Whole pipeline size is often shortened into corresponding length accordingly, then directly carries out bend pipe processing, whole elongation is all as endpiece
Elongation, error is brought to bend pipe processing.
The content of the invention
The present invention is intended to provide a kind of pipe first section elongation upon bending and endpiece elongation of can accurately measuring
Tube bending extends measuring method, accurately to instruct bend pipe to operate.
Tube bending of the present invention extends measuring method, comprises the following steps：
A, arc length C=R* π * α/180 and two length of tangent degree S=R*tan are calculated according to radius of curvature R and bent angle alpha
(α/2)
B, the position for drawing on pipe to be curved theoretical inflection point A, arc length, only curved point B；
C, bend pipe；
D, the pipe after bend pipe is placed on platform, width square is placed on platform, be close to first straight section (i.e. inflection point
Preceding straight length) tube outer wall, on first straight section away from inflection point position on choose a bit, then using another with a scale
Square, be adjacent to it is that width square is close to tube outer wall while, leaned against with graduated another side above pipe,
In scale value point A is marked for the place of tube outer diameter half1；With same method, another point A is marked on first straight section2；
Then A is connected1A2, and by A1A2Extension；
E, with the same methods of step D, draw out line segment on the tail straight section (i.e. the straight length of the bend pipe other end) of bend pipe
B1B2, and extend；
F, a bevel protractor is taken, bevel protractor is placed on bend pipe, a line and A1A2Overlap, another a line and B1B2Overlap,
Length of tangent line S is outwards measured from the crosspoint of bevel protractor, in straight line A1A2On point A ', be actual inflection point；In straight line B1B2On
Point B ', be actual to stop curved point；
G, the length for measuring line segment AA ', produce first section elongation；Line segment BB ' length is measured, endpiece elongation is produced.
Tube bending of the present invention extends measuring method, and it has easily measured the first section of tube bending processing
Elongation and endpiece elongation, when tube bending is processed, can be very good to determine pipe range and inflection point, so as to well ensure curved
The precision of pipe processing, can accurately instruct the processing of bend pipe.In addition, in the measurement process of its elongation, in the absence of to point of contact position
The determination and the measurement of bending arc length put, its measurement accuracy is easily guaranteed that, can easily be met and be reached high-precision requirement.
Embodiment
A kind of tube bending extends measuring method, first, according to radius of curvature R and bent angle alpha calculate arc length C=
R* π * α/180 and two length of tangent degree S=R*tan (α/2)；Afterwards, theoretical inflection point A, arc length are drawn on pipe to be curved, is stopped
Curved point B position；Then bend pipe operation is carried out；After bend pipe, the pipe of bending is placed on platform, width square is placed on flat
On platform, it is close to the tube outer wall of first straight section, is chosen a bit on the position away from inflection point on first straight section, then using another
Square with a scale, be adjacent to it is that width square is close to tube outer wall while, lean against pipe with graduated another side
Above sub, point A is marked for the place of tube outer diameter half in scale value1；With same method, another point A is marked2；Then
Connect A1A2, and by A1A2Extension；Then, with same method, in the other end of bend pipe（That is tail straight section）On draw out straight line
B1B2, and extend；Then, a bevel protractor is taken, bevel protractor is placed on bend pipe, a line and A1A2Overlap, another a line with
B1B2Overlap, length of tangent line S is outwards measured from the crosspoint of bevel protractor, in straight line A1A2On point A ', be actual inflection point；
Straight line B1B2On point B ', be actual to stop curved point；Finally, line segment A A ' length is measured, first section elongation is produced；Measure line
Section B B ' length, produces endpiece elongation.Its whole measurement process is simple and convenient, can ensure precision well.
Claims (1)
1. a kind of tube bending extends measuring method, it is characterised in that：Comprise the following steps：
A, calculated according to radius of curvature R and bent angle alpha arc length C=R* π * α/180 and two length of tangent degree S=R*tan (α/
2)
B, the position for drawing on pipe to be curved theoretical inflection point A, arc length, only curved point B；
C, bend pipe；
D, the pipe after bend pipe is placed on platform, width square is placed on platform, is close to before first straight section, i.e. inflection point straight
The tube outer wall of pipeline section, chooses a bit on first straight section on the position away from inflection point, then using another with a scale straight
Angle square, be adjacent to it is that width square is close to tube outer wall while, leaned against with graduated another side above pipe, carve
Angle value marks point A for the place of tube outer diameter half1；With same method, another point A is marked on first straight section2；Then
Connect A1A2, and by A1A2Extension；
E, with the same methods of step D, draw out line segment B on the tail straight section of bend pipe, the i.e. straight length of the bend pipe other end1B2, and
Extension；
F, a bevel protractor is taken, bevel protractor is placed on bend pipe, a line and A1A2Overlap, another a line and B1B2Overlap, from angle
The crosspoint of degree chi outwards measures length of tangent line S, in straight line A1A2On point A ', be actual inflection point；In straight line B1B2On point
B ', is actual only curved point；
G, the length for measuring line segment AA ', produce first section elongation；Line segment BB ' length is measured, endpiece elongation is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510380224.4A CN105004313B (en) | 2015-07-02 | 2015-07-02 | A kind of measuring method of tube bending elongation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510380224.4A CN105004313B (en) | 2015-07-02 | 2015-07-02 | A kind of measuring method of tube bending elongation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105004313A CN105004313A (en) | 2015-10-28 |
| CN105004313B true CN105004313B (en) | 2017-10-10 |
Family
ID=54377078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510380224.4A Active CN105004313B (en) | 2015-07-02 | 2015-07-02 | A kind of measuring method of tube bending elongation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105004313B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783619B (en) * | 2016-03-07 | 2018-11-13 | 中车株洲电力机车研究所有限公司 | Measurer and measurement method for water cooling tube stringing in cooling system |
| CN106055822B (en) * | 2016-06-14 | 2019-06-18 | 大连船舶重工集团有限公司 | For obtaining the straight tube of swan-neck accurately without surplus cutting length confirmation method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3216035A1 (en) * | 1982-04-29 | 1983-11-10 | Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach | Deformation monitoring of a pipe bend |
| CN1037074C (en) * | 1991-07-08 | 1998-01-21 | 武汉交通科技大学 | Computerized resilience and elongation instrument for bent tubes |
| JP2014048133A (en) * | 2012-08-30 | 2014-03-17 | Toshiba Corp | Pipe dimension measuring device |
-
2015
- 2015-07-02 CN CN201510380224.4A patent/CN105004313B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105004313A (en) | 2015-10-28 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171123 Address after: 511462 Guangdong city of Guangzhou province Nansha District new three Road Auto Park B District No. 1-11 building BC Patentee after: Guangzhou dragon Pipe Industry Co. Ltd. Address before: 510382 Guangzhou, Guangdong Province, south of Fangcun Avenue, No. 40 Patentee before: GUANGZHOU SHIPYARD INTERNATIONAL COMPANY LIMITED |